Comtech EF Data CDM 625 Satellite Modem Installation and Operation Manual

CDM-625
Advanced Satellite Modem (18 kbps – 25 Mbps)
Installation and Operation Manual
For Firmware Version 2.3.1 or higher
IMPORTANT NOTE: The information contained in this document supersedes all previously published
information regarding this product. Product specifications are subject to change without prior notice.
Part Number MN-CDM625
Revision 15
Errata A for MN-CDM625 Rev 15
Comtech EF Data Documentation Update
Subject:
Errata Part Number:
PLM CO Number:
Comments:
Change page 1-8, IP Packet Processor AES Encryption Installation Method to Available
as EN model.
ER-CDM625-EA15 (Errata documents are not revised)
C-0035152
See attached page(s). The new information will be included in the next released
revision of the manual.
ER-CDM625-EA15
Rev -
ER-CDM625-EA15
Rev -
CDM-625
Advanced Satellite Modem (18 kbps – 25 Mbps)
Installation and Operation Manual
For Firmware Version 2.3.1 or higher
Part Number MN-CDM625
Revision 15
Copyright © 2014 Comtech EF Data. All rights reserved. Printed in the USA.
Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: 480.333.2161
BLANK PAGE
ii
TABLE OF CONTENTS
TABLE OF CONTENTS ............................................................................................................III
TABLES ................................................................................................................................ XXII
FIGURES .............................................................................................................................. XXIII
PREFACE ........................................................................................................................... XXVII
About this Manual ....................................................................................................................... xxvii
Conventions and References ........................................................................................................ xxvii
Patents and Trademarks ........................................................................................................................................... xxvii
Warnings, Cautions, and Notes ................................................................................................................................ xxvii
Recommended Standard Designations .................................................................................................................. xxviii
Safety and Compliance .................................................................................................................xxviii
Electrical Safety and Compliance ............................................................................................................................ xxviii
Grounding .................................................................................................................................................................. xxviii
Electrical Installation ................................................................................................................................................... xxix
Battery ..................................................................................................................................................................... xxix
Fuses
..................................................................................................................................................................... xxix
Operating Environment ............................................................................................................................................... xxx
European Union Radio Equipment and Telecommunications Terminal Equipment (R&TTE) Directive
(1999/5/EC) and EN 301 489-1................................................................................................................................... xxx
European Union Electromagnetic Compatibility (EMC) Directive (2004/108/EC) ...........................................xxx
European Union Low Voltage Directive (LVD) (2006/95/EC) ............................................................................ xxxi
European Union RoHS Directive (2002/95/EC) ................................................................................................... xxxi
European Union Telecommunications Terminal Equipment Directive (91/263/EEC) ................................... xxxi
CE Mark ................................................................................................................................................................ xxxi
Product Support............................................................................................................................xxxii
Comtech EF Data Headquarters .....................................................................................................xxxii
Warranty Policy ............................................................................................................................xxxii
Limitations of Warranty............................................................................................................................................ xxxiii
Exclusive Remedies ................................................................................................................................................... xxxiii
CHAPTER 1.
INTRODUCTION ............................................................................................1–1
1.1
Overview ............................................................................................................................ 1–1
1.2
Functional Description ........................................................................................................ 1–2
iii
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
1.3
Features ............................................................................................................................. 1–3
1.3.1
Physical Description .................................................................................................................................. 1–3
1.3.2
Modem Compatibility .............................................................................................................................. 1–3
1.3.3
Verification................................................................................................................................................. 1–4
1.3.4
Updating Modem Firmware .................................................................................................................... 1–4
1.3.5
Standard Data Interfaces ......................................................................................................................... 1–4
1.3.6
Optional Hardware and Accessories....................................................................................................... 1–5
1.3.7
Fully Accessible System Topology (FAST) ............................................................................................... 1–6
1.3.8
Supporting Hardware and Software ....................................................................................................... 1–9
1.3.9
Physical Features.....................................................................................................................................1–10
1.3.9.1 Dimensional Envelope .......................................................................................................................1–10
1.3.9.2 Front Panel .......................................................................................................................................... 1–11
1.3.9.3 Rear Panel ........................................................................................................................................... 1–12
1.4
Summary of Specifications ................................................................................................ 1–13
1.4.1
Modulator ................................................................................................................................................ 1–13
1.4.2
Demodulator ........................................................................................................................................... 1–15
1.4.3
Data Interfaces ........................................................................................................................................1–19
1.4.4
Automatic Uplink Power Control (AUPC) .............................................................................................1–19
1.4.5
DoubleTalk® Carrier- in-Carrier® (CnC) ...................................................................................................1–20
1.4.6
Framing Summary...................................................................................................................................1–21
1.4.7
Data Rate Ranges ....................................................................................................................................1–22
1.4.8
VersaFEC Adaptive Coding and Modulation (ACM)............................................................................1–26
1.4.9
Miscellaneous.......................................................................................................................................... 1–27
1.4.10
Approvals ................................................................................................................................................. 1–27
CHAPTER 2.
2.1
INSTALLATION .............................................................................................2–1
Unpack and Inspect the Shipment ....................................................................................... 2–1
2.2
Install the Unit Into a Rack Enclosure ................................................................................... 2–2
2.2.1
Install the Optional Rear-Mounting Support Brackets Kits .................................................................. 2–4
2.3
Configure the CDM-625 ....................................................................................................... 2–5
2.4
Verify Modem Operation .................................................................................................... 2–5
2.5
Connect the External Cables ................................................................................................ 2–5
CHAPTER 3.
3.1
REAR PANEL CONNECTORS AND PINOUTS ............................................3–1
CDM-625 Rear Panel Overview ............................................................................................ 3–1
3.2
CDM-625 Cable Connections ............................................................................................... 3–2
3.2.1
IF Connection Group................................................................................................................................. 3–3
3.2.1.1 Rx IF Connectors ................................................................................................................................... 3–3
3.2.1.2 Tx IF Connectors ................................................................................................................................... 3–3
3.2.2
Terrestrial Data Connection Group......................................................................................................... 3–4
iv
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
3.2.2.1 Data Interface (DB-25F) ....................................................................................................................... 3–4
3.2.2.1.1 HSSI Operation via the CIC-60 Interface Adapter Module.......................................... 3–5
3.2.2.2 G.703 Connectors................................................................................................................................. 3–7
3.2.2.2.1 Balanced G.703 (DB-9F) .............................................................................................. 3–7
3.2.2.2.2 Aux G.703 (DB-9F) ....................................................................................................... 3–7
3.2.2.2.3 Quad E1 Operation via the Balanced G.703 / Aux G.703 Connectors ........................ 3–8
3.2.2.2.3.1 CA-0000163 Adapter Cable.................................................................................. 3–8
3.2.2.2.3.2 CA-0000164 Adapter Cable.................................................................................. 3–9
3.2.2.2.3.3 KT-0000122/KT-0020570 Quad E1 Balanced/Unbalanced Adapter Cable Kits . 3–10
3.2.2.2.4 Unbal G.703 / ASI – Out (IDO), In (DDI) .................................................................... 3–11
3.2.2.2.5 G.703 IDI (Insert Data In), DDO (Drop Data Out) ...................................................... 3–11
3.2.2.3 Quad 10/100 Ethernet (RJ-45) ..........................................................................................................3–11
3.2.2.4 IDR Data / Alarms / Audio (HD-44F) .................................................................................................3–11
3.2.2.5 ESC (DB-9F).......................................................................................................................................... 3–12
3.2.3
Utility Connections Group......................................................................................................................3–12
3.2.3.1 Remote Control (DB-9M) ..................................................................................................................3–12
3.2.3.2 Alarms (DB-15M) ................................................................................................................................3–13
3.2.3.3 PMSI Connector, DB-9F .....................................................................................................................3–13
3.2.3.4 1:1 Control (DB-9F).............................................................................................................................3–14
3.2.3.5 Ext Ref In/Out .....................................................................................................................................3–14
3.3
CDM-625 Ground and Power Connections ......................................................................... 3–15
3.3.1
Chassis Ground Interface .......................................................................................................................3–15
3.3.2
Standard 100V/240V Alternating Current (AC) Power Interface ......................................................3–16
3.3.2.1 AC Operation – CDM-625 Accessories .............................................................................................3–16
3.3.2.2 AC Operation – Apply Power ............................................................................................................3–17
3.3.2.3 AC Operation – Replace the Fuses ...................................................................................................3–17
3.3.3
Optional 48V Direct Current (DC) Power Interface .............................................................................3–18
3.3.3.1 Optional DC Operation – CDM-625 Accessories.............................................................................3–19
3.3.3.2 Optional DC Operation – Apply Power ............................................................................................3–19
3.3.3.3 Optional DC Operation – Replace the Fuses ...................................................................................3–20
CHAPTER 4.
UPDATING FIRMWARE ................................................................................4–1
4.1
Updating Firmware via Internet........................................................................................... 4–1
4.2
About Firmware Files, Naming, Versions, and Archive Formats ............................................ 4–1
4.3
Firmware Update Procedure ............................................................................................... 4–3
4.3.1
Getting Started: Preparing for the Firmware Download...................................................................... 4–3
4.3.2
Downloading and Extracting the Firmware Update ............................................................................. 4–5
4.3.3
Executing the Ethernet FTP Upload Procedure ..................................................................................... 4–7
CHAPTER 5.
FRONT PANEL OPERATION ........................................................................5–1
5.1
Overview ............................................................................................................................ 5–1
5.1.1
LED Indicators ............................................................................................................................................ 5–2
5.1.2
Keypad........................................................................................................................................................ 5–3
v
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
5.1.3
Vacuum Fluorescent Display (VFD) ......................................................................................................... 5–4
5.1.3.1 Screen Saver.......................................................................................................................................... 5–4
5.1.3.2 Opening Screen .................................................................................................................................... 5–4
5.1.3.2.1 Feature Availability/Operation Indicators via the Opening Screen ............................ 5–4
5.2
SELECT: (Main) Menu .......................................................................................................... 5–6
5.2.1
SELECT: Configuration Menus ................................................................................................................. 5–8
5.2.1.1 CONFIG: All ............................................................................................................................................ 5–9
5.2.1.2 CONFIG: Mode...................................................................................................................................5–10
5.2.1.3 CONFIG: Tx .......................................................................................................................................... 5–12
5.2.1.3.1 CONFIG: Tx  Tx-IF................................................................................................... 5–12
5.2.1.3.2 CONFIG: Tx  Freq (Frequency) ............................................................................... 5–13
5.2.1.3.3 CONFIG: Tx  Power ................................................................................................ 5–13
5.2.1.3.3.1 CONFIG: Tx  Power  Mode  AUPC .......................................................... 5–14
5.2.1.3.4 CONFIG: Tx  FEC .................................................................................................... 5–15
5.2.1.3.5 CONFIG: Tx  Mod (Modulation) ............................................................................ 5–17
5.2.1.3.6 CONFIG: Tx  Data ................................................................................................... 5–18
5.2.1.3.7 CONFIG: Tx  Symb (IP-ACM Mode Only) ............................................................... 5–19
5.2.1.3.8 CONFIG: Tx  Scrambler .......................................................................................... 5–20
5.2.1.4 CONFIG: Rx .......................................................................................................................................... 5–21
5.2.1.4.1 CONFIG: Rx  Rx-IF .................................................................................................. 5–21
5.2.1.4.2 CONFIG: Rx Freq (Frequency) ............................................................................... 5–22
5.2.1.4.3 CONFIG: Rx  FEC .................................................................................................... 5–22
5.2.1.4.4 CONFIG: Rx  Demod (Demodulation) .................................................................... 5–24
5.2.1.4.5 CONFIG: Rx  Data .................................................................................................. 5–25
5.2.1.4.6 CONFIG: Rx  Symb (IP-ACM Mode Only) ............................................................... 5–26
5.2.1.4.7 CONFIG: Rx  Descram (Descrambler) .................................................................... 5–27
5.2.1.4.8 CONFIG: Rx  Eq (Equalizer) .................................................................................... 5–27
5.2.1.4.9 CONFIG: Rx  EbNo ................................................................................................. 5–28
5.2.1.5 CONFIG: Clocks ...................................................................................................................................5–29
5.2.1.5.1 CONFIG: Clocks  Tx Clock....................................................................................... 5–29
5.2.1.5.2 CONFIG: Clocks  Rx Buffer/Clock ........................................................................... 5–30
5.2.1.5.3 CONFIG: Clocks  Clk-Ext (G.703 Clock Extension).................................................. 5–31
5.2.1.5.4 CONFIG: Clocks  Freq-Ref ...................................................................................... 5–32
5.2.1.5.5 CONFIG: Clocks  Int-Ref-Adjust ............................................................................. 5–32
5.2.1.6 CONFIG: D&I (Drop & Insert) ............................................................................................................5–33
5.2.1.6.1 CONFIG: D&I  Loop ................................................................................................ 5–33
5.2.1.6.2 CONFIG: D&I  Drp-Type or Ins-Type ...................................................................... 5–33
5.2.1.6.3 CONFIG: D&I  (Drop or Insert) Chan/TS (Channel Timeslots) ............................... 5–34
5.2.1.6.4 CONFIG: Quad D&I (QDI) .......................................................................................... 5–34
5.2.1.7 CONFIG: ACM (Adaptive Coding and Modulation) (IP-ACM Mode Only) ...................................5–36
5.2.1.7.1 CONFIG: ACM  Min/Max-ModCod ........................................................................ 5–36
5.2.1.7.2 CONFIG: ACM  Unlock-Action ............................................................................... 5–36
5.2.1.7.3 CONFIG: ACM  Target-EbNo-Margin ..................................................................... 5–37
5.2.1.8 CONFIG: CnC .......................................................................................................................................5–37
5.2.1.8.1 CONFIG: CnC  Mode .............................................................................................. 5–37
5.2.1.8.2 CONFIG: CnC  CONFIG: CnC  Freq-Offset .......................................................... 5–38
5.2.1.8.3 CONFIG: CnC  Search-Delay .................................................................................. 5–38
vi
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
5.2.1.8.4 CONFIG: CnC  PMSI-Control .................................................................................. 5–39
5.2.1.9 CONFIG: EDMAC.................................................................................................................................5–40
5.2.1.10 CONFIG: Misc ......................................................................................................................................5–41
5.2.1.10.1 CONFIG: Misc  G.703-LineCode (Ternary Code).................................................. 5–41
5.2.1.10.2 CONFIG: Misc  IDR-ESC ........................................................................................ 5–41
5.2.1.10.3 CONFIG: Misc  HSSI ............................................................................................. 5–42
5.2.1.10.4 CONFIG: Misc  RTS .............................................................................................. 5–42
5.2.1.10.5 CONFIG: Misc  Audio-Vol (ADPCM Audio Volumes) ........................................... 5–42
5.2.1.10.6 CONFIG: Misc  HiRateESC .................................................................................... 5–43
5.2.1.10.7 CONFIG: Misc  Warm-Up..................................................................................... 5–44
5.2.1.10.8 CONFIG: Misc  Stats (Statistics) ........................................................................... 5–44
5.2.1.10.9 CONFIG: Misc  MEO ............................................................................................ 5–45
5.2.1.10.9.1 CONFIG: Misc  MEO Antenna Handover .................................................. 5–46
5.2.1.11 CONFIG: Mask.....................................................................................................................................5–46
5.2.1.11.1 CONFIG: Mask  AIS .............................................................................................. 5–46
5.2.1.11.2 CONFIG: Mask  Buffer or Ref............................................................................... 5–47
5.2.1.11.3 CONFIG: Mask  RxIF............................................................................................. 5–47
5.2.1.11.4 CONFIG: Mask  TxClk ........................................................................................... 5–47
5.2.1.11.5 CONFIG: Mask  TxSat (Satellite Tx Alarms) ......................................................... 5–48
5.2.1.11.6 CONFIG: Mask  RxSat (Satellite Rx Alarms) ......................................................... 5–48
5.2.1.11.7 CONFIG: Mask  Terr............................................................................................. 5–48
5.2.1.11.8 CONFIG: Mask  ROp (RAN Optimization) (FUTURE) ............................................ 5–48
5.2.1.11.9 CONFIG: Mask  BUC ............................................................................................ 5–49
5.2.1.11.10 CONFIG: Mask  LNB ........................................................................................... 5–49
5.2.1.11.11 CONFIG: Mask  CEX (G.703 Clock Extension mask)........................................... 5–49
5.2.1.12 CONFIG: Remote (Remote Control) .................................................................................................5–49
5.2.1.12.1 CONFIG: Remote  Local or Serial remote settings .............................................. 5–50
5.2.1.13 CONFIG: IP ........................................................................................................................................... 5–50
5.2.1.13.1 CONFIG: IP  Addresses ........................................................................................ 5–50
5.2.1.13.2 CONFIG: IP  SNMP ............................................................................................... 5–51
5.2.1.13.3 CONFIG: IP  Setup................................................................................................ 5–53
5.2.1.13.4 CONFIG: IP  ANT (Advanced Network Timing) .................................................... 5–64
5.2.1.13.4.1 CONFIG: IP  ANT  SNTP (Simple Network Time Protocol) ........................ 5–64
5.2.1.13.4.2 CONFIG: IP  ANT  PTP (Precision Time Protocol) ...................................... 5–65
5.2.1.13.5 CONFIG: IP AccessList.......................................................................................... 5–65
5.2.1.13.6 CONFIG: IP  PktP-Enable ..................................................................................... 5–66
5.2.2
SELECT: Test Menus................................................................................................................................5–67
5.2.2.1 SELECT: TEST  Mode.......................................................................................................................5–67
5.2.2.2 SELECT: TEST  BERT ........................................................................................................................5–69
5.2.2.2.1 SELECT: TEST  BERT  Config ............................................................................... 5–69
5.2.2.2.2 SELECT: TEST  BERT  Monitor ............................................................................ 5–69
5.2.2.3 SELECT: TEST  CnC-APC-Monitor ..................................................................................................5–69
5.2.2.4 SELECT: TEST  Uncorrected-BER ...................................................................................................5–70
5.2.3
SELECT: Monitor Menus.........................................................................................................................5–71
5.2.3.1 Monitor: Live-Alarms .........................................................................................................................5–71
5.2.3.2 Monitor: Stored Events .....................................................................................................................5–72
5.2.3.3 Monitor: ACM .....................................................................................................................................5–73
5.2.3.4 Monitor: Statistics ..............................................................................................................................5–73
vii
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
5.2.3.5 Monitor: Rx Parameters ....................................................................................................................5–75
5.2.3.6 Monitor: AUPC-Parameters ..............................................................................................................5–75
5.2.3.7 Monitor: CnC-Parameters .................................................................................................................5–75
5.2.3.8 Monitor: IP Statistics ..........................................................................................................................5–76
5.2.4
SELECT: Info (Information) Menus ........................................................................................................5–76
5.2.4.1 Info: All ................................................................................................................................................. 5–76
5.2.4.2 Info: ID ................................................................................................................................................. 5–76
5.2.4.3 Info: Mode........................................................................................................................................... 5–77
5.2.4.4 Info: Tx ................................................................................................................................................. 5–77
5.2.4.5 Info: Rx ................................................................................................................................................. 5–77
5.2.4.6 Info: Clocks .......................................................................................................................................... 5–78
5.2.4.7 Info: EDMAC........................................................................................................................................5–78
5.2.4.8 Info: Drop ............................................................................................................................................ 5–78
5.2.4.9 Info: Insert ........................................................................................................................................... 5–79
5.2.4.10 Info: Remote .......................................................................................................................................5–79
5.2.4.11 Info: Alarms Mask...............................................................................................................................5–79
5.2.4.12 Info: Misc ............................................................................................................................................. 5–79
5.2.5
SELECT: Store/Ld (Store/Load) Menus .................................................................................................5–80
5.2.6
SELECT: Utility Menus.............................................................................................................................5–81
5.2.6.1 Utilities: Set-RTC .................................................................................................................................5–81
5.2.6.2 Utilities: Display-Bright.......................................................................................................................5–81
5.2.6.3 Utilities: CarrID ....................................................................................................................................5–81
5.2.6.4 Utilities: LED ........................................................................................................................................5–82
5.2.6.5 Utilities: Redundancy .........................................................................................................................5–82
5.2.6.5.1 Utilities: Redundancy  Traffic-IP-Addr/Range ....................................................... 5–82
5.2.6.5.2 Utilities: Redundancy  1:1 ..................................................................................... 5–82
5.2.6.5.3 Utilities: Redundancy  1:N..................................................................................... 5–82
5.2.6.6 Utilities: Circuit-ID...............................................................................................................................5–83
5.2.6.7 Utilities: Firmware ..............................................................................................................................5–84
5.2.6.7.1 Utilities: Firmware  Base-Modem ......................................................................... 5–84
5.2.6.7.1.1 Utilities: Firmware  Base-Modem  Boot-ROM, Image#X ........................... 5–84
5.2.6.7.1.2 Utilities: Firmware  Base-Modem Select.................................................... 5–84
5.2.6.7.2 Utilities: Firmware  Packet-Processor ................................................................... 5–85
5.2.6.7.2.1 Utilities: Firmware  Packet-Processor  Boot-ROM, Image#X ..................... 5–85
5.2.6.7.2.2 Utilities: Firmware  Packet-Processor Select ............................................. 5–85
5.2.6.8 Utilities: Em (CDM-600/600L Emulation) ........................................................................................5–86
5.2.7
SELECT: ODU Menus (Summary Only) .................................................................................................5–86
5.2.8
SELECT: FAST Menus ..............................................................................................................................5–87
5.2.8.1 FAST: Options......................................................................................................................................5–87
5.2.8.1.1 FAST: Options  View Options ................................................................................ 5–87
5.2.8.1.2 FAST: Options  Set Registers ................................................................................. 5–88
5.2.8.2 FAST: Demo-Mode .............................................................................................................................5–89
5.2.8.3 FAST: CnC ............................................................................................................................................ 5–90
CHAPTER 6.
6.1
ETHERNET-BASED REMOTE PRODUCT MANAGEMENT .........................6–1
Overview ............................................................................................................................ 6–1
viii
CDM-625 Advanced Satellite Modem
Table of Contents
6.2
Revision 15
MN-CDM625
Ethernet Management Interface Connectors ....................................................................... 6–1
6.3
SNMP Interface................................................................................................................... 6–2
6.3.1
Management Information Base (MIB) Files........................................................................................... 6–2
6.3.2
SNMP Community Strings........................................................................................................................ 6–3
6.3.3
SNMP Traps ............................................................................................................................................... 6–3
6.4
Telnet Interface .................................................................................................................. 6–5
6.4.1
Using the Telnet Interface for Remote Control Operation .................................................................. 6–5
6.4.1.1 Using HyperTerminal for Telnet Remote Control Operation .......................................................... 6–5
6.4.2
Using the Telnet Interface for Telnet Command Line Interface (CLI) Operation............................... 6–7
6.5
Web Server (HTTP) Interface ............................................................................................... 6–8
6.5.1
User Login .................................................................................................................................................. 6–8
6.5.2
Web Server Interface – Operational Features....................................................................................... 6–9
6.5.2.1 Navigation ............................................................................................................................................. 6–9
6.5.2.2 Page Sections ........................................................................................................................................ 6–9
6.5.2.3 Action Buttons ...................................................................................................................................... 6–9
6.5.2.4 Drop-down Lists..................................................................................................................................6–10
6.5.2.5 Text or Data Entry...............................................................................................................................6–10
6.5.3
Web Server Interface – Menu Tree ......................................................................................................6–11
6.5.3.1 Conditional Access to IP Packet Processor Pages ...........................................................................6–12
6.5.4
Web Server Page Descriptions ..............................................................................................................6–13
6.5.4.1 Home Pages ........................................................................................................................................6–13
6.5.4.1.1 Home | Home ........................................................................................................... 6–13
6.5.4.1.2 Home | Contact ........................................................................................................ 6–14
6.5.4.1.3 Home | Support ........................................................................................................ 6–15
6.5.4.2 Admin Pages .......................................................................................................................................6–16
6.5.4.2.1 Admin | Access ......................................................................................................... 6–16
6.5.4.2.2 Admin | SNMP .......................................................................................................... 6–18
6.5.4.2.3 Admin | Firmware Pages .......................................................................................... 6–19
6.5.4.2.3.1 Admin | Firmware | Base Modem ..................................................................... 6–19
6.5.4.2.3.2 Admin | Firmware | Packet Processor............................................................... 6–20
6.5.4.2.4 Admin | Reboot ........................................................................................................ 6–21
6.5.4.2.5 Admin | FAST ............................................................................................................ 6–22
6.5.4.2.6 Admin | Utilities ........................................................................................................ 6–23
6.5.4.3 Configuration Pages ...........................................................................................................................6–24
6.5.4.3.1 Configuration | Modem ............................................................................................ 6–24
6.5.4.3.2 Configuration | LAN Pages ........................................................................................ 6–25
6.5.4.3.2.1 Configuration | LAN | IP .................................................................................... 6–25
6.5.4.3.2.2 Configuration | LAN | ARP ................................................................................. 6–29
6.5.4.3.3 Configuration | Routing Pages .................................................................................. 6–31
6.5.4.3.3.1 Configuration | Routing | Routes ...................................................................... 6–31
6.5.4.3.3.2 Configuration | Routing | IGMP ........................................................................ 6–33
6.5.4.3.3.3 Configuration | Routing | DHCP ........................................................................ 6–35
6.5.4.3.3.4 Configuration | Routing | DNS .......................................................................... 6–36
6.5.4.3.4 Configuration | Managed Switch.............................................................................. 6–37
6.5.4.3.5 Configuration | WAN Pages ...................................................................................... 6–39
ix
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
6.5.4.3.5.1 Configuration | WAN | QoS Pages..................................................................... 6–39
6.5.4.3.5.1.1 Configuration | WAN | QoS Pages – Max/Priority, Min/Max Modes ........ 6–40
6.5.4.3.5.1.2 Configuration | WAN | QoS Pages – DiffServ Mode................................... 6–44
6.5.4.3.5.2 Configuration | WAN | Compression ................................................................ 6–46
6.5.4.3.5.3 Configuration | WAN | Encryption .................................................................... 6–47
6.5.4.3.6 Configuration | Overhead......................................................................................... 6–49
6.5.4.3.7 Configuration | Utilities ............................................................................................ 6–51
6.5.4.3.8 Configuration | D&I (Drop and Insert) ...................................................................... 6–54
6.5.4.3.9 Configuration | BUC (Block Up Converter) ............................................................... 6–55
6.5.4.3.10 Configuration | LNB (Low Noise Block Down Converter) ....................................... 6–55
6.5.4.3.11 Configuration | ANT (Advanced Network Timing) Pages ....................................... 6–56
6.5.4.3.11.1 Configuration | ANT | PTP (Precision Time Protocol) ..................................... 6–56
6.5.4.3.11.2 Configuration | ANT | SNTP (Simple Network Timing Protocol) ..................... 6–58
6.5.4.3.12 Configuration | MEO (Mid-Earth Orbit).................................................................. 6–59
6.5.4.4 Status Pages ........................................................................................................................................6–60
6.5.4.4.1 Status | Modem Status ............................................................................................. 6–60
6.5.4.4.2 Status | Modem Logs ................................................................................................ 6–61
6.5.4.4.2.1 Status | Modem Logs | Base Modem ................................................................ 6–61
6.5.4.4.2.2 Status | Modem Logs | Packet Processor.......................................................... 6–63
6.5.4.4.3 Status | Modem Info................................................................................................. 6–64
6.5.4.4.4 Status | Traffic Statistics Pages ................................................................................. 6–65
6.5.4.4.4.1 Status | Traffic Statistics | Ethernet .................................................................. 6–65
6.5.4.4.4.2 Status | Traffic Statistics | Router ..................................................................... 6–66
6.5.4.4.4.3 Status | Traffic Statistics | Managed Switch...................................................... 6–67
6.5.4.4.4.4 Status | Traffic Statistics | WAN ........................................................................ 6–68
6.5.4.4.4.5 Status | Traffic Statistics | Compression ........................................................... 6–69
6.5.4.4.4.6 Status | Traffic Statistics | QoS .......................................................................... 6–70
6.5.4.4.4.7 Status | Traffic Statistics | PTP .......................................................................... 6–71
6.5.4.4.4.8 Status | Traffic Statistics | MAC Table ............................................................... 6–73
6.5.4.4.4.9 Status | Traffic Statistics | Clear Counters......................................................... 6–74
6.5.4.4.5 Status | Performance Pages ..................................................................................... 6–75
6.5.4.4.5.1 Status | Performance | Performance ................................................................ 6–75
6.5.4.4.5.2 Status | Performance | Graphs ......................................................................... 6–76
6.5.4.5 ODU (Outdoor Unit) Pages (Summary Only)...................................................................................6–77
6.5.4.6 Redundancy page ...............................................................................................................................6–78
CHAPTER 7.
FORWARD ERROR CORRECTION OPTIONS ............................................7–1
7.1
Overview ............................................................................................................................ 7–1
7.2
Viterbi ................................................................................................................................ 7–1
7.3
Sequential .......................................................................................................................... 7–2
7.4
Reed-Solomon Outer Codec ................................................................................................ 7–3
7.4.1
Closed Network Modes............................................................................................................................ 7–3
7.4.2
Open Network Modes.............................................................................................................................. 7–4
x
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
7.5
Trellis Coding (FAST Option) ................................................................................................ 7–4
7.6
Turbo Product Codec (Hardware Option) ............................................................................. 7–5
7.7
TPC and Low Density Parity Check (LDPC) coding ................................................................. 7–6
7.7.1
About TPC/LDPC........................................................................................................................................ 7–6
7.7.2
LDPC versus TPC ........................................................................................................................................ 7–7
7.7.3
End-to-End Processing Delay .................................................................................................................7–10
7.8
VersaFEC (Short-block LDPC).............................................................................................. 7–11
7.8.1
VersaFEC Extensions ...............................................................................................................................7–13
7.8.1.1 Extended CCM Codes.........................................................................................................................7–13
7.8.1.2 Ultra-Low-Latency (ULL) Codes.........................................................................................................7–13
7.9
Uncoded Operation (No FEC) ............................................................................................. 7–14
CHAPTER 8.
8.1
AUTOMATIC UPLINK POWER CONTROL (AUPC) ....................................8–1
Overview ............................................................................................................................ 8–1
8.2
Setting AUPC Parameters .................................................................................................... 8–2
8.2.1
Target Eb/No ............................................................................................................................................. 8–2
8.2.2
Max Range ................................................................................................................................................. 8–2
8.2.3
Alarm .......................................................................................................................................................... 8–3
8.2.4
Demod Unlock........................................................................................................................................... 8–3
8.3
Compensation Rate............................................................................................................. 8–3
8.4
Monitoring ......................................................................................................................... 8–4
CHAPTER 9.
9.1
CLOCK MODES AND DROP AND INSERT (D&I)........................................9–1
Overview ............................................................................................................................ 9–1
9.2
Transmit Clocking ............................................................................................................... 9–1
9.2.1
Internal Clock ............................................................................................................................................. 9–1
9.2.2
TX Terrestrial.............................................................................................................................................. 9–2
9.2.3
RX Loop-Timed, RX=TX ............................................................................................................................. 9–2
9.2.4
RX Loop-Timed, RX<>TX (Asymmetric Loop Timing) ............................................................................ 9–2
9.2.5
External TT with ST = RX Satellite ............................................................................................................ 9–2
9.3
Receive Clocking ................................................................................................................. 9–4
9.3.1
Buffer Disabled (RX Satellite) ................................................................................................................... 9–4
9.3.2
Buffer Enabled, TX=RX (TX Terrestrial or Int (SCT) Clock) ..................................................................... 9–4
9.3.3
Buffer Enabled, RX<>TX (TX Terrestrial or Int (SCT) Clock)................................................................... 9–4
9.4
X.21 Notes .......................................................................................................................... 9–6
9.5
Drop and Insert ................................................................................................................... 9–6
xi
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
9.6
Frame Formats.................................................................................................................... 9–7
9.7
Timeslot Selection............................................................................................................... 9–8
9.8
Drop and Insert (D&I) Clocking ............................................................................................ 9–9
9.9
RX Buffer Clock = Insert (D&I only) .................................................................................... 9–10
9.10
Single-Source Multiple Modems ........................................................................................ 9–10
9.11 G.703 Clock Extension ....................................................................................................... 9–11
9.11.1
Clock Extension Mode 1 .........................................................................................................................9–11
9.11.2
Clock Extension Mode 2 .........................................................................................................................9–12
9.11.3
Clock Extension Mode 3 .........................................................................................................................9–12
9.12
Quad E1 Operation ........................................................................................................... 9–16
CHAPTER 10.
DOUBLETALK CARRIER-IN-CARRIER OPTION .....................................10–1
10.1
Overview .......................................................................................................................... 10–1
10.2
What is DoubleTalk Carrier-in-Carrier? .............................................................................. 10–1
10.3 Application Requirements ................................................................................................. 10–2
10.3.1
Operational Recommendations ............................................................................................................10–4
10.4 System Functionality and Operational Considerations........................................................ 10–5
10.4.1
DoubleTalk Carrier-in-Carrier Cancellation Process ............................................................................10–7
10.4.2
Margin Requirements ............................................................................................................................10–9
10.4.3
Carrier-in-Carrier Latency.......................................................................................................................10–9
10.4.4
Carrier-in-Carrier and Adaptive Coding and Modulation ...................................................................10–9
10.4.5
Carrier-in-Carrier Link Design.................................................................................................................10–9
10.4.5.1 Symmetric Data Rate Link .............................................................................................................. 10–10
10.4.5.2 Asymmetric Data Rate Link ............................................................................................................ 10–12
10.4.5.3 Power Limited Links ........................................................................................................................ 10–13
10.4.6
Carrier-in-Carrier Commissioning and Deployment ........................................................................ 10–15
10.4.7
Validate Carrier-in-Carrier Performance ........................................................................................... 10–16
10.5 Operational References................................................................................................... 10–17
10.5.1
Calculate Carrier-in-Carrier Link Budget ............................................................................................ 10–17
10.5.2
Methods to Use to Estimate PSD Ratio ............................................................................................. 10–18
10.5.2.1 Use Downlink EIRP and Symbol Rate ............................................................................................ 10–18
10.5.2.2 Use LST.............................................................................................................................................. 10–18
10.5.2.3 Use SatMaster ................................................................................................................................. 10–19
10.5.2.4 Use a Spectrum Analyzer................................................................................................................ 10–19
10.6 Carrier-in-Carrier Automatic Power Control (CnC-APC) ..................................................... 10–20
10.6.1
About CnC-APC..................................................................................................................................... 10–20
10.6.2
AUPC and Carrier-in-Carrier in the CDM-625 ................................................................................... 10–20
xii
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
10.6.3
The CnC Automatic Power Control Algorithm.................................................................................. 10–20
10.6.4
CnC-APC Framing ................................................................................................................................. 10–23
10.6.4.1 CnC-APC Framing and the Self-Locking Problem......................................................................... 10–24
10.6.5
CnC-APC Response Time ..................................................................................................................... 10–24
10.6.6
CnC-APC Setup ..................................................................................................................................... 10–24
10.6.7
CnC-APC Redundancy Support Notes ............................................................................................... 10–27
10.7
DoubleTalk Carrier-in-Carrier Specifications ..................................................................... 10–28
10.8
Carrier-in-Carrier Summary ............................................................................................. 10–29
10.9
Glossary.......................................................................................................................... 10–29
CHAPTER 11.
EDMAC CHANNEL ....................................................................................11–1
11.1 Overview .......................................................................................................................... 11–1
11.1.1
EDMAC ..................................................................................................................................................... 11–1
11.1.2
Drop & Insert ++ ......................................................................................................................................11–2
11.1.3
EDMAC-3.................................................................................................................................................. 11–2
11.2
EDMAC Channel M&C Connection ..................................................................................... 11–3
11.3
EDMAC Channel Setup ...................................................................................................... 11–4
CHAPTER 12.
ESC++........................................................................................................12–1
12.1
Overview .......................................................................................................................... 12–1
12.2
Overhead Details .............................................................................................................. 12–1
12.3
Available Baud Rates......................................................................................................... 12–2
12.4
Configuration.................................................................................................................... 12–2
12.5
Effect on Eb/No Performance ............................................................................................ 12–2
CHAPTER 13.
OFFSET QPSK OPERATION ....................................................................13–1
CHAPTER 14.
OPEN NETWORK OPERATIONS .............................................................14–1
14.1
Overview .......................................................................................................................... 14–1
14.2 Intelsat Business Service (IBS) ........................................................................................... 14–1
14.2.1
IBS Clock/Data Recovery and De-jitter .................................................................................................14–2
14.2.2
IBS Framing .............................................................................................................................................. 14–2
14.2.3
IBS Engineering Service Channel ...........................................................................................................14–2
14.2.4
IBS Scrambling .........................................................................................................................................14–2
xiii
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
14.3 Drop and Insert (D&I) ........................................................................................................ 14–3
14.3.1
D&I Primary Data Interfaces ..................................................................................................................14–4
14.3.2
D&I Framing............................................................................................................................................. 14–4
14.4 Intermediate Data Rate (IDR) ............................................................................................ 14–5
14.4.1
IDR Primary Data Interfaces...................................................................................................................14–6
14.4.2
IDR Engineering Service Channel ..........................................................................................................14–6
CHAPTER 15.
IP SUB-MUX ..............................................................................................15–1
15.1
Overview .......................................................................................................................... 15–1
15.2
Available Ratios ................................................................................................................ 15–1
15.3
Data Rate vs. Composite Rate............................................................................................ 15–2
CHAPTER 16.
16.1
ETHERNET NETWORK CONFIGURATION ..............................................16–1
Overview .......................................................................................................................... 16–1
16.2 CDM-625 Ethernet Overview ............................................................................................. 16–1
16.2.1
Interface Architecture ............................................................................................................................16–1
16.2.2
Modes of Ethernet Operation ...............................................................................................................16–2
16.2.3
Ethernet Networking Loops...................................................................................................................16–2
16.2.3.1 Networking Loops in Managed Switch Mode.................................................................................16–3
16.2.3.1.1 Hub-to-Hub using Ethernet Switches ..................................................................... 16–3
16.2.3.1.2 Hub-to-Hub using Ethernet Routers ....................................................................... 16–4
16.2.3.1.3 Hub-to-Remotes using Ethernet Switches or Routers ............................................ 16–5
16.2.3.2 Networking Loops in Router Mode (with IP Packet Processor) ....................................................16–6
16.3 Ethernet Network Configurations in Managed Switch Mode .............................................. 16–7
16.3.1
Point-to-Multipoint Hub-to-Remotes, Split-path Traffic Using Routers ........................................16–7
16.3.2
Point-to-Multipoint Hub-to-Remotes, Split-path Traffic Using Switches ......................................16–8
16.4 Ethernet Network Configurations in Router Mode (with IP Packet Processor) ..................... 16–9
16.4.1
Point-to-Multipoint (Router Multipoint Hub) Mode ..........................................................................16–9
16.4.1.1 Router Multipoint Hub Configuration..............................................................................................16–9
16.4.2
Multicast Routing Mode ..................................................................................................................... 16–11
16.4.2.1 Multicast Routing Configuration ................................................................................................... 16–12
16.5 Ethernet Overhead over WAN Interface .......................................................................... 16–13
16.5.1
Managed Switch Mode (without IP Packet Processor) ................................................................... 16–13
16.5.2
Router Mode or Managed Switch Mode (with IP Packet Processor) ............................................ 16–13
16.6
Ethernet Redundancy...................................................................................................... 16–14
16.7 Advanced Network Timing .............................................................................................. 16–15
16.7.1
Overview ............................................................................................................................................... 16–15
xiv
CDM-625 Advanced Satellite Modem
Table of Contents
16.7.2
16.7.3
Revision 15
MN-CDM625
SNTP (Simple Network Time Protocol).............................................................................................. 16–15
PTP (Precision Time Protocol)............................................................................................................. 16–15
CHAPTER 17.
ADAPTIVE CODING AND MODULATION (ACM) .....................................17–1
17.1
Overview .......................................................................................................................... 17–1
17.2
Background ...................................................................................................................... 17–2
17.3
Requirements for ACM...................................................................................................... 17–3
17.4
An Existing Satellite ACM Scheme...................................................................................... 17–5
17.5
Disadvantages of DVB-S2 .................................................................................................. 17–5
17.6
VersaFEC ACM .................................................................................................................. 17–6
17.7
VersaFEC ACM Latency ...................................................................................................... 17–8
17.8
Configuring VersaFEC ACM in the CDM-625 ....................................................................... 17–9
17.9
Monitoring ACM performance......................................................................................... 17–11
17.10
ACM Congestion Control ............................................................................................. 17–12
17.11
Notes and Recommendations ...................................................................................... 17–13
17.12
VersaFEC ACM – Summary of Specifications ................................................................. 17–15
CHAPTER 18.
IP PACKET PROCESSOR OPTION ..........................................................18–1
18.1 Overview .......................................................................................................................... 18–1
18.1.1
IP Packet Processor – Operational Requirements ..............................................................................18–1
18.1.2
Interoperability Compatibility/Limitations...........................................................................................18–2
18.2 IP Packet Processor Features ............................................................................................. 18–2
18.2.1
Streamline Encapsulation (SLE) .............................................................................................................18–2
18.2.2
Modes of Operation ...............................................................................................................................18–2
18.2.3
Subsystem Multiplex (Sub-Mux) ...........................................................................................................18–2
18.2.4
Adaptive Coding and Modulation (ACM) .............................................................................................18–3
18.2.5
FAST Options ...........................................................................................................................................18–3
18.2.5.1 Header Compression .........................................................................................................................18–4
18.2.5.2 Payload Compression ........................................................................................................................18–4
18.2.5.3 Advanced Quality of Service (QoS)...................................................................................................18–4
18.2.5.4 Advanced Encryption Standard (AES) Encryption ..........................................................................18–5
18.3 CDM-625 Operation with IP Packet Processor .................................................................... 18–5
18.3.1
Front Panel Operation ............................................................................................................................18–5
18.3.2
Ethernet-based Remote Product Management .................................................................................18–5
xv
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
18.3.2.1 SNMP Interface...................................................................................................................................18–6
18.3.2.2 Telnet Interface ..................................................................................................................................18–6
18.3.2.3 Web Server (HTTP) Interface ............................................................................................................18–7
18.4
List of Supported Internet RFCs (Requests for Comment) ................................................... 18–8
18.5 IP Packet Processor Field Upgrade Procedure .................................................................... 18–9
18.5.1
Overview .................................................................................................................................................. 18–9
18.5.2
Requirements for Field Upgrade ...........................................................................................................18–9
18.5.3
Field Upgrade Procedure .................................................................................................................... 18–10
CHAPTER 19.
CARRIER ID (METACARRIER® ) ...............................................................19–1
19.1
Overview .......................................................................................................................... 19–1
19.2
About MetaCarrier ............................................................................................................ 19–1
19.3
Functional Description ...................................................................................................... 19–2
19.4 Configure the CDM-625 for Carrier ID Operation ................................................................ 19–3
19.4.1
Enable Carrier ID Operation...................................................................................................................19–4
19.4.1.1 Use the Front Panel Keypad and VFD to Enable Operation ..........................................................19–4
19.4.1.2 Use the Web Server (HTTP) Interface to Enable Operation ..........................................................19–4
19.4.2
Create the MetaCarrier Custom Message ...........................................................................................19–5
19.4.2.1 Use the Front Panel Keypad and VFD to Create the Message ......................................................19–5
19.4.2.2 Use the Web Server (HTTP) Interface to Create the Message......................................................19–5
CHAPTER 20.
QUALITY OF SERVICE (QOS) ..................................................................20–1
20.1 Overview .......................................................................................................................... 20–1
20.1.1
QoS Terminology.....................................................................................................................................20–1
20.2 Layer 2 QoS....................................................................................................................... 20–2
20.2.1
Modem Tx Data Rate vs. QoS Tx Data Rate .........................................................................................20–2
20.2.2
Flow Control ............................................................................................................................................ 20–3
20.2.3
Port-based Layer 2 QoS ..........................................................................................................................20–3
20.2.4
VLAN-based Layer 2 QoS........................................................................................................................20–6
20.3 Layer 3 QoS..................................................................................................................... 20–10
20.3.1
Layer 3 QoS Max-Pri Mode ................................................................................................................. 20–10
20.3.2
Layer 3 QoS Min-Max Mode............................................................................................................... 20–12
20.3.3
Layer 3 QoS DiffServ Mode ................................................................................................................. 20–14
20.3.3.1 Layer 3 QoS Congestion Avoidance............................................................................................... 20–14
20.3.3.2 Layer 3 QoS List of Supported RFCs (Requests for Comment)................................................... 20–15
20.4 QoS with ACM (Adaptive Coding and Modulation) ........................................................... 20–16
20.4.1
Maximum Clipping............................................................................................................................... 20–16
20.4.2
Minimum Data Rate ............................................................................................................................ 20–16
xvi
CDM-625 Advanced Satellite Modem
Table of Contents
APPENDIX A.
Revision 15
MN-CDM625
CABLE DRAWINGS ..................................................................................... A-1
A.1
Overview ............................................................................................................................ A-1
A.1.1
EIA-530 to EIA-422/449 DCE Conversion Cable..................................................................................... A-2
A.1.2
EIA-530 to V.35 DCE Conversion Cable .................................................................................................. A-3
A.1.3
EIA-232 Remote Control Cable................................................................................................................ A-4
APPENDIX B.
EB/NO MEASUREMENT............................................................................... B–1
APPENDIX C.
FAST ACTIVATION PROCEDURE ............................................................. C–1
C.1
FAST System Overview ........................................................................................................ C–1
C.2
FAST Activation Procedure .................................................................................................. C–2
C.2.1
FAST Activation via the CDM-625 Front Panel ......................................................................................C–2
C.2.2
FAST Activation via the CDM-625 Web Server (HTTP) Interface.........................................................C–4
APPENDIX D.
REMOTE CONTROL ................................................................................... D–1
D.1
Overview ........................................................................................................................... D–1
D.2
EIA-485 .............................................................................................................................. D–1
D.3
EIA-232 .............................................................................................................................. D–2
D.4
Basic Protocol .................................................................................................................... D–2
D.4.1
Packet Structure ....................................................................................................................................... D–3
D.4.1.1 Start of Packet...................................................................................................................................... D–3
D.4.1.2 Target Address ..................................................................................................................................... D–4
D.4.1.3 Address Delimiter ................................................................................................................................ D–4
D.4.1.4 Instruction Code .................................................................................................................................. D–4
D.4.1.5 Instruction Code Qualifier .................................................................................................................. D–4
D.4.1.6 Optional Message Arguments ........................................................................................................... D–6
D.4.1.7 End Of Packet....................................................................................................................................... D–6
D.5
Remote Commands and Queries ........................................................................................ D–7
D.5.1
Table Indexes............................................................................................................................................ D–7
D.5.2
Tx Parameters ........................................................................................................................................ D–10
D.5.3
Rx Parameters ........................................................................................................................................ D–19
D.5.4
Unit Parameters ..................................................................................................................................... D–27
D.5.5
Bulk Configuration Strings..................................................................................................................... D–41
D.5.6
Modem Information.............................................................................................................................. D–47
D.5.7
Modem Performance Information ...................................................................................................... D–50
D.5.8
BUC Parameters (L-Band Device) ......................................................................................................... D–57
D.5.9
LNB Parameters (L-Band Device) ......................................................................................................... D–59
D.5.10 Ethernet Parameters ............................................................................................................................. D–60
xvii
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
APPENDIX E. TELNET COMMAND LINE INTERFACE (CLI) OPERATION ...................... E–1
E.1
Overview ............................................................................................................................ E–1
E.1.1
Interface Access ........................................................................................................................................ E–1
E.1.2
Terminal Emulator Considerations ......................................................................................................... E–2
E.1.2.1 Using the PuTTY Terminal Emulator .................................................................................................. E–2
E.1.2.2 Using the Tera Term Terminal Emulator ........................................................................................... E–4
E.2
Using the Telnet Command Line Interface (CLI) .................................................................... E–7
E.2.1
Telnet CLI Menu System – Parallel Functionality .................................................................................. E–7
E.2.2
CLI Menus – Common Navigation and Operation Features ................................................................ E–7
E.3
Command Line Interface Pages.......................................................................................... E–10
E.3.1
Home (Main) Menu ................................................................................................................................ E–10
E.3.1.1 Home > Remote Access Mode ......................................................................................................... E–11
E.3.2
Home > Administration Submenu ........................................................................................................ E–12
E.3.2.1 Home > Administration > Host Access List ...................................................................................... E–13
E.3.2.2 Home > Administration > SNMP ...................................................................................................... E–14
E.3.2.3 Home > Administration > Firmware (Base Modem) or (Packet Processor) ................................E–15
E.3.2.4 Home > Administration > Reboot..................................................................................................... E–16
E.3.2.5 Home > Administration > FAST......................................................................................................... E–17
E.3.2.6 Home > Administration > Save Modem Configuration / Load Modem Configuration..............E–19
E.3.2.7 Home > Administration > Restore Factory Defaults ......................................................................E–21
E.3.3
Home > Modem Submenu .................................................................................................................... E–22
E.3.3.1 Home > Modem > Interface.............................................................................................................. E–23
E.3.3.2 Home > Modem > Modem TX .......................................................................................................... E–24
E.3.3.3 Home > Modem > Modem RX.......................................................................................................... E–26
E.3.3.4 Home > Modem > Carrier-in-Carrier (CnC) ..................................................................................... E–28
E.3.3.5 Home > Modem > Adaptive Coding and Modulation (ACM)........................................................E–29
E.3.3.6 Home > Modem > Drop and Insert (D&I) ........................................................................................ E–30
E.3.3.6.1 Home > Modem > Drop and Insert (D&I) > D&I Tables ............................................ E–31
E.3.3.7 Home > Modem > Block Upconverter (BUC) .................................................................................. E–33
E.3.3.8 Home > Modem > (Low-Noise Block Downconverter) LNB ..........................................................E–34
E.3.3.9 Home > Modem > MEO (Medium-Earth Orbit) .............................................................................E–35
E.3.3.10 Home > Modem > Utilities ................................................................................................................ E–36
E.3.3.11 Home > Modem > Overhead ............................................................................................................ E–38
E.3.4
Home > Network Submenu ................................................................................................................... E–40
E.3.4.1 Home > Network > Ethernet Ports ................................................................................................... E–41
E.3.4.1.1 Home > Network > Ethernet Ports > Ethernet Port # ............................................... E–42
E.3.4.2 Home > Network > LAN IP................................................................................................................. E–43
E.3.4.3 Home > Network > LAN ARP ............................................................................................................. E–44
E.3.4.3.1 Home > Network > LAN ARP > Arp Table > Arp Entry # ............................................ E–45
E.3.4.4 Home > Network > VLAN .................................................................................................................. E–46
E.3.4.4.1 Home > Network > VLAN > VLAN Table > VLAN # .................................................... E–47
E.3.4.5 Home > Network > Routes ................................................................................................................ E–48
E.3.4.5.1 Home > Network > Routes > Route Table................................................................. E–49
E.3.4.6 Home > Network > Managed Switch ............................................................................................... E–50
E.3.4.7 Home > Network > IGMP (Internet Group Management Protocol) ............................................E–51
xviii
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
E.3.4.8 Home > Network > DNS (Domain Name System) ..........................................................................E–52
E.3.4.9 Home > Network > DHCP (Dynamic Host Configuration Protocol) ..............................................E–52
E.3.4.10 Home > Network > PTP (Precision Time Protocol) .........................................................................E–53
E.3.4.11 Home > Network > SNTP (Simple Network Time Protocol) ..........................................................E–54
E.3.4.12 Home > Network > MAC Table ......................................................................................................... E–55
E.3.5
Home > WAN Submenu ......................................................................................................................... E–56
E.3.5.1 Home > WAN > QoS Submenu ......................................................................................................... E–56
E.3.5.1.1 Home > WAN > QoS > Max-Pri and Min-Max Table ................................................. E–57
E.3.5.1.2 Home > WAN > QoS > QoS Differentiated Services Table ........................................ E–58
E.3.5.2 Home > WAN > Compression ........................................................................................................... E–59
E.3.5.3 Home >WAN > Encryption ................................................................................................................ E–60
E.3.6
Home > Outdoor Unit (ODU) Submenus (Summary Only) ................................................................E–62
E.3.7
Home > Redundancy Submenu ............................................................................................................ E–63
E.3.8
Home > General Information Submenu............................................................................................... E–64
E.3.8.1 Home > General Information > Modem Status ..............................................................................E–65
E.3.8.2 Home > General Information > Modem Information ....................................................................E–66
E.3.8.3 Home > General Information > MAC Table..................................................................................... E–67
E.3.8.4 Home > General Information > Block Upconverter (BUC) ............................................................E–68
E.3.8.5 Home > General Information > Low Noise Block Downconverter (LNB).....................................E–68
E.3.9
Home > Logs Submenu .......................................................................................................................... E–69
E.3.9.1 Home > Logs > Base Modem ............................................................................................................ E–70
E.3.9.1.1 Home > Logs > Base Modem > Stored Event Table .................................................. E–71
E.3.9.1.2 Home > Logs > Base Modem > Stored Statistic Table............................................... E–72
E.3.9.2 Home > Logs > Packet Processor ...................................................................................................... E–73
E.3.9.2.1 Home > Logs > Packet Processor > Stored Event Table ............................................ E–74
E.3.10
Home > Statistics Submenu ................................................................................................................... E–75
E.3.10.1 Home > Statistics > Ethernet Submenu ........................................................................................... E–76
E.3.10.1.1 Home > Statistics > Ethernet > Rx ........................................................................... E–77
E.3.10.1.2 Home > Statistics > Ethernet > Tx ........................................................................... E–78
E.3.10.1.3 Home > Statistics > Ethernet > Errors ..................................................................... E–79
E.3.10.2 Home > Statistics > Router ................................................................................................................ E–80
E.3.10.3 Home > Statistics > Managed Switch ............................................................................................... E–81
E.3.10.4 Home > Statistics > WAN (Router Mode) ........................................................................................ E–82
E.3.10.5 Home > Statistics > WAN (Managed Switch Mode).......................................................................E–83
E.3.10.6 Home > Statistics > Compression ..................................................................................................... E–84
E.3.10.6.1 Home > Statistics > Compression > Table View ...................................................... E–85
E.3.10.7 Home > Statistics > QoS ..................................................................................................................... E–86
E.3.10.7.1 Home > Statistics > QoS > Table View..................................................................... E–86
E.3.10.8 Home > Statistics > PTP ..................................................................................................................... E–87
E.3.10.8.1 Home > Statistics > PTP > LAN Details .................................................................... E–88
E.3.10.8.2 Home > Statistics > PTP > WAN Details .................................................................. E–88
E.3.10.9 Home > Statistics > CPU..................................................................................................................... E–89
E.3.10.10 Home > Statistics > Clear All Counters ............................................................................................. E–89
E.3.11
Home > Contact Page ............................................................................................................................. E–90
APPENDIX F. CDM-625 ODU (TRANSCEIVER, BUC, LNB) OPERATION........................ F–1
F.1
Overview ............................................................................................................................ F–1
xix
CDM-625 Advanced Satellite Modem
Table of Contents
F.2
Revision 15
MN-CDM625
ODU Remote Control Address Setup .................................................................................... F–2
F.3
ODU Operations via the CDM-625 Front Panel ..................................................................... F–3
F.3.1
CDM-625 Front Panel Operation Overview........................................................................................... F–3
F.3.2
CDM-625 Front Panel Menus – ODU Menu Hierarchy ........................................................................ F–4
F.3.3
SELECT: (Main) Menu Overview.............................................................................................................. F–5
F.3.3.1 (SELECT: CONFIGURATION) Menu Branches .................................................................................... F–6
F.3.3.1.1 CONFIG: Tx  Freq and CONFIG: Rx  Freq Submenus ........................................... F–6
F.3.3.1.2 (SELECT: CONFIGURATION) Mask Submenus ............................................................. F–6
F.3.3.1.2.1 CONFIG: Mask  BUC.......................................................................................... F–7
F.3.3.1.2.2 CONFIG: Mask  LNB .......................................................................................... F–8
F.3.3.2 (SELECT: MONITOR) Live-Alarms Menu ............................................................................................ F–9
F.3.3.3 (SELECT:) ODU Menu Branches ........................................................................................................ F–10
F.3.3.3.1 ODU: BUC:PwrSupply+Ref (Power Supply and Reference) ....................................... F–10
F.3.3.3.1.1 ODU: BUC:PwrSupply+Ref  PSU-and-10MHz Parameters .............................. F–10
F.3.3.3.1.2 ODU: BUC:PwrSupply+Ref  LO Freq (Local Oscillator Frequency).................. F–11
F.3.3.3.1.3 ODU: BUC:PwrSupply+Ref  PSUmonitor ........................................................ F–11
F.3.3.3.2 ODU: LNB:PwrSupply+Ref (Power Supply and Reference) ....................................... F–12
F.3.3.3.2.1 ODU: LNB:PwrSupply+Ref  PSU-and-10MHz .................................................. F–12
F.3.3.3.2.2 ODU: LNB:PwrSupply+Ref  LO-Freq (Local Oscillator Frequency) .................. F–12
F.3.3.3.2.3 ODU: LNB:PwrSupply+Ref  PSUmonitor......................................................... F–13
F.3.3.3.3 ODU: FSK-control ...................................................................................................... F–13
F.3.3.3.3.1 ODU: FSK-control  CSAT ................................................................................. F–15
F.3.3.3.3.1.1 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Configuration............. F–15
F.3.3.3.3.1.1.1 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Configuration  Tx ....
.............................................................................................................. F–15
F.3.3.3.3.1.1.2 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Configuration  Rx ....
.............................................................................................................. F–16
F.3.3.3.3.1.1.3 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Configuration  LNA .
.............................................................................................................. F–16
F.3.3.3.3.1.1.4 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Configuration  Misc
.............................................................................................................. F–17
F.3.3.3.3.1.2 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Monitor ..................... F–18
F.3.3.3.3.1.3 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Alarms ....................... F–18
F.3.3.3.3.1.3.1 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Alarms CurrentAlarms
.............................................................................................................. F–18
F.3.3.3.3.1.3.2 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Alarms  StoredAlarms
.............................................................................................................. F–19
F.3.3.3.3.1.4 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Info ............................ F–19
F.3.3.3.3.2 ODU: FSK-control  2CSATs .............................................................................. F–21
F.3.3.3.3.2.1 ODU: FSK-control  2CSATs  CSAT#X ..................................................... F–21
F.3.3.3.3.2.2 ODU: FSK-control  2CSATs  Redundancy-Box ...................................... F–21
F.3.3.3.3.3 ODU: FSK-control  KST .................................................................................... F–23
F.3.3.3.3.3.1 ODU: FSK-control  KST  Configuration ................................................. F–23
F.3.3.3.3.3.1.1 ODU: FSK-control  KST  Configuration  Tx................................. F–23
F.3.3.3.3.3.1.2 ODU: FSK-control  KST  Configuration  Rx ................................ F–23
F.3.3.3.3.3.1.3 ODU: FSK-control  KST  Configuration  Miscellaneous ............. F–23
F.3.3.3.3.3.1.4 ODU: FSK-control  KST  Information ............................................. F–24
xx
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
F.3.3.3.3.3.1.5 ODU: FSK-control  KST  Information  Model............................. F–24
F.3.3.3.3.3.1.6 ODU: FSK-control  KST  Information  Tx+Rx-Param .................. F–24
F.3.3.3.3.3.1.7 ODU: FSK-control  KST  Information  Misc ............................... F–25
F.3.3.3.3.3.1.8 ODU: FSK-control  KST  Information  Numbers ........................ F–25
F.3.3.3.3.3.1.9 ODU: FSK-control  KST  Alarms ..................................................... F–25
F.3.3.3.3.4 ODU: FSK-control  BUC ................................................................................... F–26
F.3.3.3.3.4.1 ODU: FSK-control  BUC  Configuration ................................................ F–26
F.3.3.3.3.4.2 ODU: FSK-control  BUC  Status ............................................................ F–26
F.3.3.3.3.4.3 ODU: FSK-control  BUC  Advanced-FSK ............................................... F–26
F.3.3.3.3.4.3.1 ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD) ...................................................................................................... F–27
F.3.3.3.3.4.3.1.1 ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD)  Cnfg ..................................................................................... F–27
F.3.3.3.3.4.3.1.2 ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD) Monitor ................................................................................ F–29
F.3.3.3.3.4.3.1.3 ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs
Online/Offline LPOD)  LPOD  Alarms ................................................................... F–30
F.3.3.3.3.4.3.1.4 ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs
Online/Offline LPOD) Statistics ............................................................................... F–31
F.3.3.3.3.4.3.1.5 ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs
Online/Offline LPOD) Information .......................................................................... F–33
F.3.3.3.3.4.3.1.6 ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs
Online/Offline LPOD)  Redun .................................................................................. F–34
F.3.3.3.3.4.3.1.7 ODU: FSK-control  BUC  Advanced-FSK  2LPODs .............. F–35
F.4
ODU Operations via the CDM-625 Web Server (HTTP) Interface ......................................... F–36
F.4.1
Web Server Interface and Menu Tree .................................................................................................. F–36
F.4.2
Web Page Descriptions .......................................................................................................................... F–38
F.4.2.1 Configuration | BUC (Block Up Converter) Page ............................................................................ F–38
F.4.2.2 Configuration | LNB (Low Noise Block Down Converter) .............................................................. F–39
F.4.2.3 Status | Modem Logs | Base Modem Page .................................................................................... F–40
F.4.2.4 ODU Pages........................................................................................................................................... F–42
F.4.2.4.1 ODU | Enable ............................................................................................................ F–43
F.4.2.4.2 ODU | Config Pages................................................................................................... F–44
F.4.2.4.2.1 ODU | Config (CSAT-5060) ................................................................................. F–44
F.4.2.4.2.2 ODU | Config (KST-2000A/B) ............................................................................. F–47
F.4.2.4.3 ODU | Status ............................................................................................................. F–49
F.4.2.4.3.1 ODU | Status (CSAT-5060) ................................................................................. F–49
F.4.2.4.3.2 ODU | Status (KST-2000A/B) .............................................................................. F–50
F.4.2.4.4 ODU | Utilities ........................................................................................................... F–51
F.4.2.4.4.1 ODU | Utilities (CSAT-5060) ............................................................................... F–51
F.4.2.4.4.2 ODU | Utilities (KST-2000A/B) ........................................................................... F–53
F.5
ODU Operations via the CDM-625 Telnet Command Line Interface (CLI) ............................. F–54
F.5.1
ODU Operations using the Telnet CLI ................................................................................................... F–55
F.5.1.1 Home (Main) Menu ........................................................................................................................... F–55
F.5.1.2 Home > Outdoor Unit (ODU) Submenu .......................................................................................... F–56
F.5.1.2.1 Home > Outdoor Unit (ODU) > CSAT-5060 Submenu ............................................... F–57
xxi
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
F.5.1.2.1.1 Home > Outdoor Unit (ODU) > CSAT-5060 > Up Converter Settings 1/2, 2/2 ... F–58
F.5.1.2.1.2 Home > Outdoor Unit (ODU) > CSAT-5060 > Down Converter Settings 1/2, 2/2 ......
............................................................................................................................ F–59
F.5.1.2.1.3 Home > Outdoor Unit (ODU) > CSAT-5060 > Unit Settings 1/2, 2/2 .................. F–60
F.5.1.2.1.4 Home > Outdoor Unit (ODU) > CSAT-5060 > LNA Settings ................................ F–61
F.5.1.2.1.5 Home > Outdoor Unit (ODU) > CSAT-5060 > Status .......................................... F–62
F.5.1.2.1.6 Home > Outdoor Unit (ODU) > CSAT-5060 > Logs ............................................. F–63
F.5.1.2.1.7 Home > Outdoor Unit (ODU) > CSAT-5060 > Redundancy ................................ F–64
F.5.1.2.1.8 Home > Outdoor Unit (ODU) > CSAT-5060 > Utilities ........................................ F–64
TABLES
Table 1-1. CDM-625 Optional Hardware and Accessories ........................................................................ 1–5
Table 1-2. CDM-625 FAST and FAST-accessible Hardware Options.......................................................... 1–7
Table 3-1. CDM-625 Rear Panel Cabling Connections .............................................................................. 3–2
Table 3-2. Data Interface Connector Pinouts........................................................................................... 3–4
Table 3-3. CIC-60 Module – HSSI/EIA-613 Side Connector Pinouts ......................................................... 3–6
Table 3-4. Balanced G.703 Connector Pinouts......................................................................................... 3–7
Table 3-5. Auxiliary G.703 Connector Pinouts ......................................................................................... 3–7
Table 3-6. CA-0000163 Connector Pinouts .............................................................................................. 3–8
Table 3-7. CA-0000164 Connector Pinouts .............................................................................................. 3–9
Table 3-8. CA-0000347/CA-0020710 Connector Pinouts....................................................................... 3–10
Table 3-9. IDR Data/Alarms/Audio Connector Pinouts .......................................................................... 3–11
Table 3-10. ESC Connector Pinouts ........................................................................................................ 3–12
Table 3-11. Remote Control Connector Pinouts .................................................................................... 3–12
Table 3-12. Alarm Interface Connector Pinouts..................................................................................... 3–13
Table 3-13. PMSI (Pre-Mapped Symbol Interface) Connector Pinouts.................................................. 3–13
Table 3-14. 1:1 Control Interface Connector Pinouts ............................................................................ 3–14
Table 7-1. Viterbi Decoding Summary ...................................................................................................... 7–2
Table 7-2. Sequential Decoding Summary ................................................................................................ 7–3
Table 7-3. Concatenated RS Coding Summary.......................................................................................... 7–4
Table 7-4. 8-PSK/TCM Coding Summary ................................................................................................... 7–5
Table 7-5. Available TPC/ LDPC Modes ..................................................................................................... 7–8
Table 7-6. Comparison of all Comtech EF Data TPC/LDPC Modes (CDM-625 with TPC/LDPC Codec) ..... 7–9
Table 7-7. TPC/LDPC Processing Delay Comparison ............................................................................... 7–10
Table 7-8. TPC/LDPC Summary ............................................................................................................... 7–10
Table 7-9. The VersaFEC ModCod set ..................................................................................................... 7–11
Table 10-1. Spectral Efficiency using DoubleTalk Carrier-in-Carrier ....................................................... 10–7
Table 17-1. The VersaFEC ModCod set ................................................................................................... 17–7
Table 17-2. VersaFEC Implementation of ACM – 100 ksymbols/sec Example Case ............................... 17–8
Table 20-1. Modem Tx Data Rate vs. QoS Tx Data Rate (Hardware-limited) ......................................... 20–2
Table 20-2. 802.1q to Layer 2 QoS Priority Conversion .......................................................................... 20–6
xxii
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
FIGURES
Figure 1-1. CDM-625 Advanced Satellite Modem .................................................................................... 1–1
Figure 1-2. CDM-625 Dimensional Envelope .......................................................................................... 1–10
Figure 1-3. CDM-625 Front Panel Features ............................................................................................ 1–11
Figure 1-4. CDM-625 Rear Panel Features .............................................................................................. 1–12
Figure 1-5. Rx Carrier Level vs. Symbol Rate – L-Band (950-2000 MHz) ................................................. 1–18
Figure 1-6. Rx Carrier Level vs. Symbol Rate – IF Band (50-180 MHz) .................................................... 1–18
Figure 2-1. Unpack and Inspect the Shipment .......................................................................................... 2–1
Figure 2-2. Install the Unit Into a Rack Enclosure ..................................................................................... 2–3
Figure 2-3. Install the Optional Rear-Mounting Support Brackets Kit ...................................................... 2–4
Figure 3-1. CDM-625 Rear Panel View ...................................................................................................... 3–1
Figure 3-2. CIC-60 Interface Adapter Module (CEFD P/N PL-0000307) .................................................... 3–5
Figure 3-3. CA-0000163 Adapter Cable (DB-9M  (2X) DB-15F) ............................................................. 3–8
Figure 3-4. CA-0000164 Adapter Cable (DB-9M  (2X) RJ-48F) .............................................................. 3–9
Figure 3-5. Quad E1 Balanced/Unbalanced Adapter Cable Kits ............................................................. 3–10
Figure 3-6. CDM-625 Chassis Ground Interface ...................................................................................... 3–15
Figure 3-7. CDM-625 Standard AC Chassis (CEFD P/N PL/12587-1) ....................................................... 3–16
Figure 3-8. Apply AC Power to the CDM-625.......................................................................................... 3–17
Figure 3-9. Replace the CDM-625 AC Fuses ............................................................................................ 3–17
Figure 3-10. CDM-625 Optional DC Chassis (CEFD P/N PL/12587-2) ...................................................... 3–18
Figure 3-11. Apply Power to the CDM-625 Optional DC Chassis ............................................................ 3–19
Figure 3-12. Replace the CDM-625 Optional DC Chassis Fuses .............................................................. 3–20
Figure 5-1. CDM-625 Front Panel Features .............................................................................................. 5–1
Figure 5-2. CDM-625 Principle Menu Tree (FW Ver. 2.3.1) ...................................................................... 5–7
Figure 5-3. Loopback Modes ................................................................................................................... 5–68
Figure 6-1. CDM-625 Telnet Command Line Interface (CLI) ..................................................................... 6–7
Figure 6-2. CDM-625 Web Server (HTTP) Interface Menu Tree (FW Ver. 2.3.1) .................................... 6–11
Figure 6-3. CDM-625 Satellite Modem Home page ................................................................................ 6–13
Figure 6-4. Home | Contact page............................................................................................................ 6–14
Figure 6-5. Home | Support page ........................................................................................................... 6–15
Figure 6-6. Admin | Access page ............................................................................................................ 6–16
Figure 6-7. Admin | SNMP page ............................................................................................................. 6–18
Figure 6-8. Admin | Firmware | Base Modem page ............................................................................... 6–19
Figure 6-9. Admin | Firmware | Packet Processor page......................................................................... 6–20
Figure 6-10. Status | Firmware Info | Reboot page................................................................................ 6–21
Figure 6-11. Admin | FAST page ............................................................................................................. 6–22
Figure 6-12. Admin | Utilities page ......................................................................................................... 6–23
Figure 6-13. Configuration | Modem page ............................................................................................. 6–24
Figure 6-14. Configuration | LAN | IP page ............................................................................................ 6–25
Figure 6-15. Configuration | LAN | ARP page ......................................................................................... 6–29
Figure 6-16. Configuration | Routing | Routes page .............................................................................. 6–31
Figure 6-17. Configuration | Routing | IGMP page ................................................................................ 6–33
Figure 6-18. Configuration | Routing | DHCP page ................................................................................ 6–35
Figure 6-19. Configuration | Routing | DNS page................................................................................... 6–36
Figure 6-20. Configuration | Managed Switch page ............................................................................... 6–37
Figure 6-21. Configuration | WAN | QoS Pages ..................................................................................... 6–40
xxiii
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
Figure 6-22. Configuration | WAN | QoS page (DiffServ Mode) ............................................................ 6–44
Figure 6-23. Configuration | WAN | Compression page ........................................................................ 6–46
Figure 6-24. Configuration | WAN | Encryption page ............................................................................ 6–47
Figure 6-25. Configuration | Overhead page .......................................................................................... 6–49
Figure 6-26. Configuration | Utilities page ............................................................................................. 6–51
Figure 6-27. Configuration | D&I page (Selected Framing Mode = D&I) ................................................ 6–54
Figure 6-28. Configuration | BUC page ................................................................................................... 6–55
Figure 6-29. Configuration | LNB page ................................................................................................... 6–55
Figure 6-30. Configuration | ANT | PTP page ......................................................................................... 6–56
Figure 6-31. Configuration | ANT | SNTP page ....................................................................................... 6–58
Figure 6-32. Configuration | ANT | SNTP page ....................................................................................... 6–59
Figure 6-33. Status | Modem Status page .............................................................................................. 6–60
Figure 6-34. Status | Modem Logs | Base Modem page ........................................................................ 6–61
Figure 6-35. Status | Modem Logs | Packet Processor page .................................................................. 6–63
Figure 6-36. Status | Modem Info page .................................................................................................. 6–64
Figure 6-37. Status | Traffic Statistics | Ethernet page .......................................................................... 6–65
Figure 6-38. Status | Traffic Statistics | Router page.............................................................................. 6–66
Figure 6-39. Status | Traffic Statistics | Managed Switch page .............................................................. 6–67
Figure 6-40. Status | Traffic Statistics | WAN page ................................................................................ 6–68
Figure 6-41. Status | Traffic Statistics | Compression page ................................................................... 6–69
Figure 6-42. Status | Traffic Statistics | QoS page (DiffServ Mode) ....................................................... 6–70
Figure 6-43. Status | Traffic Statistics | PTP page................................................................................... 6–71
Figure 6-44. Status | Traffic Statistics | MAC Table page ....................................................................... 6–73
Figure 6-45. Status | Traffic Statistics | Clear Counters page ................................................................. 6–74
Figure 6-46. Status | Performance | Performance page ........................................................................ 6–75
Figure 6-47. Status | Performance | Graphs page.................................................................................. 6–76
Figure 6-48. ODU Page Examples (Enable, Config, Status, and Utilities) ................................................ 6–77
Figure 6-49. Redundancy page ............................................................................................................... 6–78
Figure 7-1. TPC & LDPC Modes Performance (Relative to Shannon Limit)............................................... 7–7
Figure 7-2. VersaFEC Codes versus Shannon Capacity ........................................................................... 7–12
Figure 7-3. Viterbi Decoding ................................................................................................................... 7–16
Figure 7-4. Viterbi with Concatenated R-S Outer Code .......................................................................... 7–17
Figure 7-5. 8-PSK/TCM Rate 2/3 with and without Concatenated RS Outer Code................................. 7–18
Figure 7-6. Rate 3/4, Rate 7/8 16-QAM with Concatenated RS Outer Code .......................................... 7–19
Figure 7-7. Sequential Decoding at 64 kbps ........................................................................................... 7–20
Figure 7-8. Sequential Decoding at 2048 kbps ....................................................................................... 7–21
Figure 7-9. Sequential Decoding at 512 kbps with RS 220,200 Outer Code ........................................... 7–22
Figure 7-10. Rate 5/16 BPSK Turbo Product Codec ................................................................................ 7–23
Figure 7-11. Rate 21/44 BPSK, QPSK, OQPSK Turbo Product Codec....................................................... 7–24
Figure 7-12. Rate 3/4 QPSK/OQPSK, 8-PSK/8-QAM and 16-QAM Turbo Product Codec ....................... 7–25
Figure 7-13. Rate 7/8 QPSK/OQPSK, 8-PSK/8-QAM and 16-QAM Turbo Product Codec ....................... 7–26
Figure 7-14. Rate 0.95 QPSK and Rate 0.95 8-PSK Turbo Product Codec ............................................... 7–27
Figure 7-15. Rate 1/2 BPSK, QPSK, OQPSK, LDPC Codec......................................................................... 7–28
Figure 7-16. Rate 2/3 QPSK, OQPSK, 8-PSK, 8-QAM LDPC Codec ........................................................... 7–29
Figure 7-17. Rate 3/4 QPSK, OQPSK, 8-PSK, 8-QAM, 16-QAM LDPC Codec ........................................... 7–30
Figure 7-18. VersaFEC Codec – BPSK, Rate 0.488 ................................................................................... 7–31
Figure 7-19. VersaFEC Codec – QPSK, Rate 0.533, 0.631, 0.706 and 0.803 ............................................ 7–32
Figure 7-20. VersaFEC Codec – 8-QAM, Rate 0.642, 0.711, and 0.780 ................................................... 7–33
xxiv
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
Figure 7-21. VersaFEC Codec – 16-QAM, Rate 0.731, 0.780, 0.829 and 0.853....................................... 7–34
Figure 9-1. TX Clock Modes ....................................................................................................................... 9–3
Figure 9-2. RX Clock Modes ...................................................................................................................... 9–5
Figure 9-3. Supported T1 and E1 Framing Formats .................................................................................. 9–7
Figure 9-4. Drop and Insert Clocking......................................................................................................... 9–9
Figure 9-5. Single-Source Multiple Modems (Looming) ......................................................................... 9–10
Figure 9-6. Single-Source Multiple Modems (Daisy-chain) ..................................................................... 9–10
Figure 9-7. G.703 Clock Extension Mode 1 ............................................................................................. 9–13
Figure 9-8. G.703 Clock Extension Mode 2 ............................................................................................. 9–14
Figure 9-9. G.703 Clock Extension Mode 3 ............................................................................................. 9–15
Figure 10-1. Conceptual Block Diagram .................................................................................................. 10–3
Figure 10-2. Conventional FDMA Link .................................................................................................... 10–5
Figure 10-3. Same Link Using CDM-625 and DoubleTalk Carrier-in-Carrier............................................ 10–6
Figure 10-4. Duplex Link Optimization.................................................................................................... 10–6
Figure 10-5. DoubleTalk Carrier-in-Carrier Signals ................................................................................. 10–8
Figure 10-6. Carrier-in-Carrier Signal Processing Block Diagram ............................................................ 10–8
Figure 16-1. CDM-625 Ethernet Architecture Design ............................................................................. 16–1
Figure 16-2. Improper Use of External Ethernet Switch with CDM-625 ................................................. 16–2
Figure 16-3. Ethernet Networking Loop Example (Simplified) ............................................................... 16–2
Figure 16-4. Networking Loop Example .................................................................................................. 16–3
Figure 16-5. Hub-to-Hub with Standard Traffic using Routers ............................................................... 16–4
Figure 16-6. Hub-to-Remotes with Standard Traffic using Routers or Switches .................................... 16–5
Figure 16-7. Point-to-Point Configuration in “Router Multipoint Hub” Working Mode ........................ 16–6
Figure 16-8. Point-to-Multipoint using Routers ...................................................................................... 16–7
Figure 16-9. Point-to-Multipoint using Switches .................................................................................... 16–8
Figure 16-10. Point-to-Multipoint (Router Multipoint Hub Mode) ........................................................ 16–9
Figure 16-11. Multicast Routing Diagram ............................................................................................. 16–11
Figure 16-12. Configuration Example for a Multicast Routing Network............................................... 16–12
Figure 16-13. Configuration Example – Point-to-Point Network with PTP ........................................... 16–16
Figure 16-14. PTP Master/Slave Assignment Example ......................................................................... 16–17
Figure 17-1. ACM-over-Satellite – Generic Example............................................................................... 17–4
Figure 17-2. VersaFEC Codes vs. Constrained Capacity .......................................................................... 17–7
Figure 17-3. CDM-625 – ACM ModCod Switch Points .......................................................................... 17–10
Figure 17-4. CDM-625 – ACM Congestion Control ............................................................................... 17–12
Figure 20-1. IEEE 802.1q VLAN priority ................................................................................................... 20–6
Figure A-1. EIA-530 to EIA-422/449 DCE Conversion Cable (CEFD P/N CA/WR0049) .............................. A-2
Figure A-2. EIA-530 to V.35 DCE Conversion Cable .................................................................................. A-3
Figure A-3. EIA-232 Remote Control Cable (CDM-625 Remote Control Port to PC 9-Pin Serial Port) ...... A-4
Figure C-1. CDM-625 Web Server (HTTP) Interface – ‘ADMIN | FAST’ page ............................................ C–4
Figure F-1. CDM-625 Front Panel Features ............................................................................................... F–3
Figure F-2.CDM-625 Front Panel ODU Operation Menu Tree – (FW Ver. 2.3.1) ...................................... F–4
Figure F-3. CDM-625 Web Server (HTTP) Interface Home Page ............................................................. F–36
Figure F-4. CDM-625 Web Server (HTTP) Interface Menu Tree (FW Ver. 2.3.1) .................................... F–37
Figure F-5. Configuration | BUC page ..................................................................................................... F–38
Figure F-6. Configuration | LNB page ..................................................................................................... F–39
Figure F-7. Status | Modem Logs | Base Modem page .......................................................................... F–40
Figure F-8. ODU | Enable page ............................................................................................................... F–43
Figure F-9. ODU | Config page (CSAT-5060) ........................................................................................... F–44
xxv
CDM-625 Advanced Satellite Modem
Table of Contents
Revision 15
MN-CDM625
Figure F-10. ODU | Config page (KST-2000A/B)...................................................................................... F–47
Figure F-11. ODU | Status page (CSAT-5060) ......................................................................................... F–49
Figure F-12. ODU | Status page (KST-2000A/B) ...................................................................................... F–50
Figure F-13. ODU | Utilities page (CSAT-5060) ....................................................................................... F–51
Figure F-14. ODU | Utilities page (KST-2000A/B) ................................................................................... F–53
Figure F-15. CDM-625 Telnet Command Line Interface (CLI) ................................................................. F–54
xxvi
PREFACE
About this Manual
This manual provides installation and operation information for the Comtech EF Data CDM-625
Advanced Satellite Modem. This is a document intended for the persons responsible for the
operation and maintenance of the CDM-625.
Conventions and References
Patents and Trademarks
See all of Comtech EF Data's Patents and Patents Pending at http://patents.comtechefdata.com.
Comtech EF Data acknowledges that all trademarks are the property of the trademark owners.
•
DoubleTalk® is licensed from “Raytheon Applied Signal Technology”.
•
DoubleTalk® is a registered trademark of “Raytheon Applied Signal Technology”.
•
Carrier-in-Carrier® is a registered trademark of Comtech EF Data.
Warnings, Cautions, and Notes
A WARNING gives information about a possible hazard that MAY CAUSE DEATH or
SERIOUS INJURY.
A CAUTION gives information about a possible hazard that MAY CAUSE INJURY or
PROPERTY DAMAGE.
A NOTE gives important information about a task or the equipment.
A REFERENCE directs the user to additional information about a task or the
equipment.
xxvii
CDM-625 Advanced Satellite Modem
Preface
Revision 15
MN-CDM625
Recommended Standard Designations
The new designation of the Electronic Industries Association (EIA) supersedes the Recommended
Standard (RS) designations. References to the old designations may be shown when depicting
actual text (e.g., RS-232) displayed on the unit front panel menus, Web Server pages, serial remote
interface, Telnet Command Line Interface (CLI), or unit rear panel. All other references in the
manual refer to EIA designations.
CAUTION – The user should carefully review the following information.
Safety and Compliance
Electrical Safety and Compliance
The unit complies with the EN 60950 Safety of Information Technology Equipment (Including
Electrical Business Machines) safety standard.
CAUTION – If the unit is operated in a vehicle or movable installation, make sure the
unit is stable. Otherwise, EN 60950 safety is not guaranteed.
Sect. 3.3 CDM-625 Ground and Power Connections
Grounding
CAUTION – PROPER GROUNDING PROTECTION IS REQUIRED: The installation
instructions require that the integrity of the protective earth must be ensured and
that the equipment shall be connected to the protective earth connection at all
times.
The unit is designed for connection to a power system that has separate ground,
line and neutral conductors. The equipment is not designed for connection to a
power system that has no direct connection to ground. It is therefore imperative
during installation, configuration, and operation for the user to ensure that the unit
has been properly grounded using the ground stud provided on the rear panel of
the unit.
•
In Finland: "Laite on liitettävä suojamaadoituskoskettimilla varustettuun
pistorasiaan."
•
In Norway: “Apparatet må tilkoples jordet stikkontakt.”
•
In Sweden: “Apparaten skall anslutas till jordat uttag.”
xxviii
CDM-625 Advanced Satellite Modem
Preface
Revision 15
MN-CDM625
Electrical Installation
The unit is rated for a nominal operating range of 100-240 volts AC; for the appropriately
equipped DC option, nominal operating range is 43-60 volts DC. The unit has a maximum power
consumption of 300 watts.
The installation and connection to the line supply must be made in compliance to local or
national wiring codes and regulations.
The unit is shipped with a line inlet cable suitable for use in the country of operation. If it is
necessary to replace this cable, ensure the replacement has an equivalent specification.
Examples of acceptable ratings for the cable include HAR, BASEC and HOXXX-X.
Examples of acceptable connector ratings include VDE, NF-USE, UL, CSA, OVE, CEBEC, NEMKO,
DEMKO, BS1636A, BSI, SETI, IMQ, KEMA-KEUR and SEV.
Battery
WARNING – THE MODEM CONTAINS A LITHIUM BATTERY. DANGER OF EXPLOSION
EXISTS IF THE BATTERY IS INCORRECTLY REPLACED. REPLACE ONLY WITH THE SAME OR
EQUIVALENT TYPE RECOMMENDED BY THE MANUFACTURER. DISPOSE OF USED
BATTERIES IN ACCORDANCE WITH LOCAL AND NATIONAL REGULATIONS.
Fuses
CAUTION – FOR CONTINUED OPERATOR SAFETY, ALWAYS REPLACE THE FUSES WITH
THE CORRECT TYPE AND RATING.
The unit is fitted with two fuses:
•
For AC operation, the unit requires two common 4 Amp/250 volts 20mm x 5mm Slow-blow
fuses that are contained within a fuse holder that is press-fit into the body of the IEC power
inlet module (on the rear panel of the unit).
•
For DC operation, the unit requires two different fuses that are contained within the
individual screw-in receptacles below the terminal block (on the rear panel of the unit).
These DC fuse requirements are as follows:
o
Modem Operation – 3 Amp/250 volts 20mm x 5mm Slow-blow fuse.
o
BUC Operation – 6.3 Amp/250 volts 20mm x 5mm Slow-blow fuse.
xxix
CDM-625 Advanced Satellite Modem
Preface
Revision 15
MN-CDM625
Operating Environment
CAUTION – DO NOT OPERATE THE UNIT IN ANY OF THESE EXTREME OPERATING
CONDITIONS:
•
AMBIENT TEMPERATURES LESS THAN 0°C (32°F) OR MORE THAN 50°C (122°F). (MAXIMUM
STORAGE TEMPERATURE ALLOWED IS -25°C (-13°F) TO 85°C (185°F)).
•
PRECIPITATION, CONDENSATION, OR HUMID ATMOSPHERES OF MORE THAN 95%
RELATIVE HUMIDITY.
•
UNPRESSURIZED ALTITUDES OF MORE THAN 2000 METRES (6561.7 FEET).
•
EXCESSIVE DUST.
•
FLAMMABLE GASES.
•
CORROSIVE OR EXPLOSIVE ATMOSPHERES.
European Union Radio Equipment and Telecommunications Terminal
Equipment (R&TTE) Directive (1999/5/EC) and EN 301 489-1
Independent testing verifies that the unit complies with the European Union R&TTE Directive, its
reference to EN 301 489-1 (Electromagnetic compatibility and Radio spectrum Matters [ERM];
ElectroMagnetic Compatibility [EMC] standard for radio equipment and services, Part 1:
Common technical requirements), and the Declarations of Conformity for the applicable
directives, standards, and practices that follow:
European Union Electromagnetic Compatibility (EMC) Directive
(2004/108/EC)
•
Emissions: EN 55022 Class B – Limits and Methods of Measurement of Radio Interference
Characteristics of Information Technology Equipment.
•
Immunity: EN 55024 – Information Technology Equipment: Immunity Characteristics, Limits,
and Methods of Measurement.
•
EN 61000-3-2 – Harmonic Currents Emission
•
EN 61000-3-3 – Voltage Fluctuations and Flicker.
•
Federal Communications Commission Federal Code of Regulation FCC Part 15, Subpart B.
xxx
CDM-625 Advanced Satellite Modem
Preface
Revision 15
MN-CDM625
CAUTION – TO ENSURE THAT THE UNIT COMPLIES WITH THESE STANDARDS, OBEY
THESE INSTRUCTIONS:
•
Use coaxial cable that is of good quality (e.g., RG58/U (50Ω) or RG59/U (75Ω)) for
connections to the IF Tx and Rx (transmit and receive) BNC female connectors.
•
Use Type 'D' connectors that have back-shells with continuous metallic shielding.
Type ‘D’ cabling must have a continuous outer shield (either foil or braid, or both). The
shield must be bonded to the back-shell.
•
Operate the unit with its cover on at all times.
European Union Low Voltage Directive (LVD) (2006/95/EC)
Symbol
Description
<HAR>
Type of power cord required for use in the European Community.
!
CAUTION: Double-pole/Neutral Fusing
ACHTUNG: Zweipolige bzw. Neutralleiter-Sicherung
International Symbols
Symbol
Definition
Symbol
Definition
Alternating Current
Protective Earth
Fuse
Chassis Ground
For additional symbols, see the Warnings, Cautions and Notes explained earlier in this
Preface.
European Union RoHS Directive (2002/95/EC)
This unit satisfies (with exemptions) the requirements specified in the European Union Directive
on the Restriction of Hazardous Substances in Electrical and Electronic Equipment (EU RoHS,
Directive 2002/95/EC).
European Union Telecommunications Terminal Equipment Directive
(91/263/EEC)
In accordance with the European Union Telecommunications Terminal Equipment Directive
91/263/EEC, do not directly connect the unit to the Public Telecommunications Network.
CE Mark
Comtech EF Data declares that the unit meets the necessary requirements for the CE Mark.
xxxi
CDM-625 Advanced Satellite Modem
Preface
Revision 15
MN-CDM625
Product Support
For all product support, please call:
+1.240.243.1880
+1.866.472.3963 (toll free USA)
Comtech EF Data Headquarters
http://www.comtechefdata.com
Comtech EF Data Corp.
2114 West 7th Street
Tempe, Arizona USA 85281
+1.480.333.2200
Warranty Policy
Comtech EF Data products are warranted against defects in material and workmanship for a
specific period from the date of shipment, and this period varies by product. In most cases, the
warranty period is two years. During the warranty period, Comtech EF Data will, at its option,
repair or replace products that prove to be defective. Repairs are warranted for the remainder
of the original warranty or a 90 day extended warranty, whichever is longer. Contact Comtech
EF Data for the warranty period specific to the product purchased.
For equipment under warranty, the owner is responsible for freight to Comtech EF Data and all
related customs, taxes, tariffs, insurance, etc. Comtech EF Data is responsible for the freight
charges only for return of the equipment from the factory to the owner. Comtech EF Data will
return the equipment by the same method (i.e., Air, Express, Surface) as the equipment was
sent to Comtech EF Data.
All equipment returned for warranty repair must have a valid RMA number issued prior to
return and be marked clearly on the return packaging. Comtech EF Data strongly recommends
all equipment be returned in its original packaging.
Comtech EF Data Corporation’s obligations under this warranty are limited to repair or
replacement of failed parts, and the return shipment to the buyer of the repaired or replaced
parts.
xxxii
CDM-625 Advanced Satellite Modem
Preface
Revision 15
MN-CDM625
Limitations of Warranty
The warranty does not apply to any part of a product that has been installed, altered, repaired,
or misused in any way that, in the opinion of Comtech EF Data Corporation, would affect the
reliability or detracts from the performance of any part of the product, or is damaged as the
result of use in a way or with equipment that had not been previously approved by Comtech EF
Data Corporation.
The warranty does not apply to any product or parts thereof where the serial number or the
serial number of any of its parts has been altered, defaced, or removed.
The warranty does not cover damage or loss incurred in transportation of the product.
The warranty does not cover replacement or repair necessitated by loss or damage from any
cause beyond the control of Comtech EF Data Corporation, such as lightning or other natural
and weather related events or wartime environments.
The warranty does not cover any labor involved in the removal and or reinstallation of
warranted equipment or parts on site, or any labor required to diagnose the necessity for repair
or replacement.
The warranty excludes any responsibility by Comtech EF Data Corporation for incidental or
consequential damages arising from the use of the equipment or products, or for any inability to
use them either separate from or in combination with any other equipment or products.
A fixed charge established for each product will be imposed for all equipment returned for
warranty repair where Comtech EF Data Corporation cannot identify the cause of the reported
failure.
Exclusive Remedies
Comtech EF Data Corporation’s warranty, as stated is in lieu of all other warranties, expressed,
implied, or statutory, including those of merchantability and fitness for a particular purpose.
The buyer shall pass on to any purchaser, lessee, or other user of Comtech EF Data
Corporation’s products, the aforementioned warranty, and shall indemnify and hold harmless
Comtech EF Data Corporation from any claims or liability of such purchaser, lessee, or user
based upon allegations that the buyer, its agents, or employees have made additional
warranties or representations as to product preference or use.
The remedies provided herein are the buyer’s sole and exclusive remedies. Comtech EF Data
shall not be liable for any direct, indirect, special, incidental, or consequential damages, whether
based on contract, tort, or any other legal theory.
xxxiii
CDM-625 Advanced Satellite Modem
Preface
Revision 15
MN-CDM625
Notes:
xxxiv
Chapter 1. INTRODUCTION
1.1
Overview
Figure 1-1. CDM-625 Advanced Satellite Modem
The CDM-625 Advanced Satellite Modem (Figure 1-1) is intended for both closed network and
legacy Intelsat applications. The unit is a replacement for the CDM-600 and CDM-600L Open
Network Satellite Modems, and it includes many new or enhanced features:
•
It is compact – 1RU high and 17.6 inches deep – and consumes only 48W (typical).
•
It features front panel LED Indicators, a keypad, and a Vacuum Fluorescent Display (VFD) for
local configuration and monitoring and control (M&C). It also can be fully remote-controlled
through its serial remote control or Ethernet-based Web Server (HTTP) and Telnet
Command Line interfaces.
•
It provides a full range of built-in (i.e., no plug-in cards required) traffic data interface
types, including all G.703 types, Quad E1 Drop and Insert, HSSI, and ASI.
•
Its IF frequency range simultaneously covers 50-180 MHz and 950-2000 MHz.
•
It offers variable data rates, from 18 kbps to 25 Mbps, in BPSK, QPSK, Offset QPSK (OQPSK),
8PSK, 8-QAM and 16-QAM modes. Viterbi, Sequential, concatenated Reed-Solomon (RS),
Trellis Coded Modulation (TCM), Turbo Product Coding (TPC), Low-density Parity Check
Coding (LDPC), and VersaFEC® (short-block, low latency LDPC) are provided as Forward Error
Correction (FEC) options.
•
It is compliant with IESS-308/309/310/315 specifications, but also adds other significant
features in closed network modes.
•
Its demod design incorporates fast acquisition, improved composite power handling, and an
integrated adaptive equalizer.
•
It includes VersaFEC Adaptive Coding and Modulation to increase capacity on IP links.
1–1
CDM-625 Advanced Satellite Modem
Introduction
1.2
Revision 15
MN-CDM625
•
It can be equipped with a DoubleTalk® Carrier-in-Carrier® option card that can save up to 50%
transponder bandwidth.
•
It can be equipped with an optional IP Packet Processor card that, in addition to providing
Layer 3 functionality, incorporates a number of key features for Wide Area Network (WAN)
bandwidth optimization: very low overhead Streamline Encapsulation (SLE), Header and
Payload Compression, Advanced Quality of Service (QoS), and Advanced Encryption Standard
(AES) Encryption.
•
IEEE-1588v2 Precision Timing Protocol (PTP) and Jumbo Frame Support are available options
(either requires the CDM-625 Rev 2 Hardware configuration).
•
Carrier ID is a patent pending carrier identification (CID) technique that uses MetaCarrier®
spread spectrum technology to embed a unique carrier identification sequence for the
transmitted carrier.
Functional Description
The unit has two fundamentally different types of interface – IF and data:
•
The IF interface provides a bidirectional link with the satellite via the uplink and downlink
equipment.
•
The data interface is a bidirectional path that connects with the customer’s equipment
(assumed to be the DTE) and the modem (assumed to be the DCE).
Transmit data is received by the terrestrial interface where line receivers convert the clock and
data signals to CMOS levels for further processing. A small FIFO follows the terrestrial interface
to facilitate the various clocking and framing options. If framing is enabled, the transmit clock
and data output from the FIFO pass through the framer, where the overhead data (IDR, IBS, D&I
or EDMAC) is added to the main data; otherwise, the clock and data are passed directly to the
Forward Error Correction encoder.
In the FEC encoder, the data is differentially encoded, scrambled, and then convolutionally or
block encoded. Following the encoder, the data is fed to the transmit digital filters, which
perform spectral shaping on the data signals. The resultant I and Q signals are then fed to the
BPSK, QPSK/OQPSK, 8PSK, 8-QAM, or 16-QAM modulator.
The carrier is generated by a frequency synthesizer, and the I and Q signals directly modulate
this carrier. For L-Band applications, the directly modulated signal comprises the main output.
For IF applications (50–180 MHz), the L-Band signal is mixed down and filtered to produce the
desired output. The Rx-IF signal at L-Band is processed by a dual IF superheterodyne receiver.
For IF applications (50–180 MHz), the signal is first mixed up to the first IF frequency. The
second conversion is a complex mix, resulting in the signal once more being split into an inphase (I) and a quadrature (Q) component, producing an output at near-zero frequency.
1–2
CDM-625 Advanced Satellite Modem
Introduction
Revision 15
MN-CDM625
An AGC circuit maintains the desired signal level constant over a broad range. Following this, the
I and Q signals are sampled by high-speed (flash) A/D converters. All processing beyond this
conversion is purely digital, performing the functions of Nyquist filtering, carrier recovery, and
symbol timing recovery. The resultant demodulated signal is fed, in soft decision form, to the
selected FEC decoder, which can be Viterbi, Sequential, TCM, Reed-Solomon, TPC, LDPC or
VersaFEC (if installed).
After decoding, the recovered clock and data pass to the de-framer (if IBS, IDR, D&I or EDMAC
framing is enabled), where the overhead information is removed. Following this, the data passes
to the Plesiochronous/Doppler buffer, which has a programmable size, or may be bypassed.
From here, the receive clock and data signals are routed to the terrestrial interface, and are
passed to the externally connected DTE equipment.
1.3
Features
1.3.1
Physical Description
The unit is constructed as a 1RU-high rack-mounting chassis, which can be free-standing if
desired. Handles at the front ease placement into and removal from a rack.
The unit chassis assembly (CEFD P/N PL/12587-1 Standard AC Chassis or CEFD P/N PL/12587-2
Optional DC Chassis) is physically comprised of two main card assemblies:
1.3.2
•
Baseband Framing Card (CEFD P/N PL/11963-1). This first card includes all of the interface
circuits, the framer/de-framer, plesiochronous/Doppler buffer, Reed Solomon outer codec,
HDLC framer, Ethernet switch, and the main microcontroller.
•
Modem Card (CEFD P/N PL/12575-1). This second card is the modem itself. It performs all
signal processing functions of modulation, demodulation, and primary Forward Error
Correction.
Modem Compatibility
The unit is fully backwards-compatible with the Comtech EF Data CDM-500, CDM-550, and
CDM-550T modems. As an Open Network Modem, the unit is fully compatible with modems
from other manufacturers that are compliant with the IESS-308/309/310/314 specifications.
Note, however, that IESS-315 (VSAT Turbo) defines closed network operation, and this therefore
requires modems from the same manufacturer at both ends of the link.
The CDM-625 also serves as a ‘drop-in’ replacement product and is fully backwards compatible
with the CDM-600 and CDM-600L modems (with the exception of a lower data rate range of 18
kbps). An emulation mode is provided to accomplish this design intent, and is configurable via
either the unit front panel or by remote control.
1–3
CDM-625 Advanced Satellite Modem
Introduction
1.3.3
Revision 15
MN-CDM625
Verification
The unit includes many test modes and loopbacks for rapid verification of the correct
functioning of the unit. Of particular note is the IF loopback, which permits you to perform a
quick diagnostic test without having to disturb external cabling. During the loopback, all of the
receive configuration parameters are temporarily changed to match those of the transmit side,
and an internal RF switch connects the modulator output to the demodulator input. When
normal operation is again selected, all of the previous values are restored.
1.3.4
Updating Modem Firmware
Chapter 4. UPDATING FIRMWARE
The unit stores its firmware internally in flash memory, which simplifies the firmware updating
process without having to open the modem. Firmware downloads are available via the Internet
from Comtech EF Data’s Web site, via e-mail, or on CD, and can be transferred from an external
client PC once connectivity has been established with the modem.
1.3.5
Standard Data Interfaces
Chapter 3. REAR PANEL CONNECTORS AND PINOUTS
The unit includes a universal data interface that eliminates the need to exchange interface cards
for different applications. The interfaces offered, as standard, include:
•
RS-422 (EIA530) DCE (at rates up to 14 Mbps)
•
X.21 DTE and DCE (at rates up to 2.048 Mbps)
•
V.35 DCE (at rates up to 14 Mbps)
•
G.703 E1, balanced and unbalanced
•
G.703 T1, balanced
•
G.703 E2, unbalanced
•
G.703 T2, balanced and unbalanced
•
Quad E1 Drop and Insert (QDI) – up to 4 balanced E1ports
•
Serial LVDS (at rates up to 25 Mbps)
1–4
CDM-625 Advanced Satellite Modem
Introduction
Revision 15
MN-CDM625
•
HSSI (at rates up to 25 Mbps)
•
ASI
•
Four-port Ethernet 10/100 BaseT switch for IP bridging and routing
•
Dual Audio, 600Ω (produces a single 64 kbps data stream with either IBS or EDMAC framing)
1.3.6
Optional Hardware and Accessories
Table 1-1 identifies the available hardware options and accessories that can be factory-installed
at the time of ordering or user-installed in the field. Refer to the chapter section in this manual
for further information or details. Contact Comtech EF Data Product Support to purchase any of
these products.
Table 1-1. CDM-625 Optional Hardware and Accessories
Feature
LDPC/TPC
VersaFEC
Codec
CnC
IP Packet
Processor
Rack
Installation
Data
Interface
AC Power
DC Power
CEFD P/N
Description
Combination Low-density Parity Check / TPC Codec daughter card providing
KT-0000093
data rates up to 25 Mbps and a full range of code rates/modulation
VersaFEC Codec daughter card providing data rates up to 16 Mbps, 12
KT-0000092
combinations of modulation and code rate (ModCod)
KT-0000094 DoubleTalk® Carrier-in-Carrier® daughter card
KT-0000176 IP Packet Processor daughter card with Fan
KT-0000174 IP Packet Processor Kit for AC units (includes 175W Power Supply)
KT-0000175 IP Packet Processor Kit for DC units (includes 125W Power Supply).
KT/6228-2
Rear Rack-Mount Kit – 4” Bracket
KT/6228-3
Rear Rack-Mount Kit – 10” Bracket
PL-0000307
CiC-60 (HSSI) Interface Adapter Module
Quad E1 Adapter Y-Cable (for two E1 Ports: D-Type 9-pin Male to 2X D-Type
CA-0000163
15-pin Female)
CA-0000164 Quad E1 Adapter Y-Cable (for two E1 Ports: D-Type 9-pin Male to 2X RJ-48)
KT-0000122 Quad E1 Balanced/Unbalanced Adapter Kit, 6”
KT-0020570 Quad E1 Balanced/Unbalanced Adapter Kit, 3 Ft
Adapter Cable: D-Type 25-pin Male to D-Type 37-pin Female, 8” (RTS/CTS
CA/WR12685-1
Control)
KT-0020703 AC to 24VDC Conversion Kit
KT-0000226 AC to 48VDC Conversion Kit
KT-0000283 AC Primary Power Supply: 100-240 VAC (65W Power Supply) w/required cables
AC Primary Power Supply: 100-240 VAC (175W Power Supply) w/required
KT-0020701
cables
PS-0000075 AC 65W Power Supply
PS-0000065 AC 175W Power Supply
CA/17725
AC Power Cord, Standard (IEC-60320 Type C13) – USA
CA/90025-5FT AC Power Jumper Cord, Standard (IEC-60320 Type C13)
KT/11633-1
AC Power Cord Retainer Kit (for any AC Cord)
CA/17850
AC Power Cord – European / French
PP-0000097 AC Power Cord – Japanese
PP-0020556 AC Power Cord – India
PL/12587-2
Modem Chassis – DC
KT-0020683 DC to AC Conversion Kit for CDM-625 Base Modem
KT-0020680 DC to AC Conversion Kit for CDM-625 with IP Packet Processor
1–5
Chapter
7.7
7.8
10.7
18.1.1
2.2.1
3.2.2.1.1
3.2.2.2.3.1
3.2.2.2.3.2
3.2.2.2.3.3
N/A
3.3.2
3.3.3
CDM-625 Advanced Satellite Modem
Introduction
Feature
DC Power
(cont.)
1.3.7
CEFD P/N
KT-0000282
PS-0000066
PS-0020545
CA-0000455
KT/9640-3
KT-0000029
KT-0000185
KT-0000186
Revision 15
MN-CDM625
Description
DC Primary Power Supply: –48 VDC, w/required cables
DC 48V 125W Power Supply
DC 24V 120W Power Supply
DC Pigtail Adapter
BUC Power Supply: 24 VDC 90W (50° C) (100-240 VAC Input)
BUC Power Supply: 48 VDC 150W (50° C) (100-240 VAC Input)
BUC Power Supply: 24 VDC 90W (50° C) (–48 VDC Input)
BUC Power Supply: 48 VDC 150W (50° C) (–48 VDC Input)
Chapter
3.3.3
Fully Accessible System Topology (FAST)
Appendix C. FAST Activation Procedure
The CDM-625 Advanced Satellite Modem incorporates a number of optional features. In order
to permit a lower initial cost, you may purchase the unit enabled with only the desired features.
If you wish to upgrade the functionality of a unit at a later date, Comtech EF Data provides Fully
Accessible System Topology (FAST), which permits the purchase and activation of options
through special authorization codes. You may purchase these unique, register-specific Fast
Access Codes from Comtech EF Data during normal business hours, and then load these codes
into the unit using either the front panel keypad or the CDM-625 Web Server (HTTP) Interface.
Contact Comtech EF Data Product Support to order the desired options.
FAST System Theory: FAST facilitates on-location upgrade of the operating feature set without
removing a unit from the setup. FAST technology allows you to order a unit precisely tailored for
the initial application. When your service requirements change, you can upgrade the topology of
the unit to meet these requirements within minutes. This accelerated upgrade can be
accomplished because of FAST’s extensive use of the programmable logic devices incorporated
into Comtech EF Data products.
FAST Implementation: Comtech EF Data’s FAST system is factory-implemented in the modem.
All FAST options are available through the basic platform unit at the time of order – FAST allows
immediate activation of available options, after confirmation by Comtech EF Data, through the
CDM-625 Web Server (HTTP) Interface.
FAST Accessible Options: Table 1-2 shows the FAST and FAST-accessible hardware options
available for the unit. The base CDM-625 unit is equipped with Viterbi and Reed-Solomon
codecs. It offers BPSK, QPSK, and OQPSK modulation types, and data rates up to 5.0 Mbps, with
all interface types. While it is limited to Closed Network operation, it also includes EDMAC and
AUPC.
1–6
CDM-625 Advanced Satellite Modem
Introduction
Revision 15
MN-CDM625
Table 1-2. CDM-625 FAST and FAST-accessible Hardware Options
Option
Description and Comments
Installation Method
IF band
50-180 MHz
BASE UNIT
950-2000 MHz (L-Band)
FAST
Viterbi, Sequential and concatenated Reed-Solomon
BASE UNIT
LDPC/TPC Codec daughter card
HARDWARE
VersaFEC Codec daughter card
HARDWARE
Data rate 18 kbps to 5.0 Mbps
BASE UNIT
Data rate 18 kbps to 10.0 Mbps
FAST
Data rate 18 kbps to 15.0 Mbps
FAST
Data rate 18 kbps to 20.0 Mbps
FAST
Data rate 18 kbps to 25.0 Mbps
FAST
Data rate 18 kbps to 5.0 Mbps
BASE UNIT
Data rate 18 kbps to 10.0 Mbps
FAST
Data rate 18 kbps to 15.0 Mbps
FAST
Data rate 18 kbps to 20.0 Mbps
FAST
Data rate 18 kbps to 25.0 Mbps
FAST
BPSK, QPSK, OQPSK
BASE UNIT
8PSK and 8-QAM
FAST
16-QAM
FAST
Open Network
All IDR/IBS Open Network features
FAST
Drop and Insert
T1/E1 D&I (single port)
FAST
Quad E1 Drop and Insert
FAST
DoubleTalk Carrier-in-Carrier daughter card
HARDWARE
Data rate 18 kbps to 512 kbps
FAST
Data rate 18 kbps to 1 Mbps
FAST
Data rate 18 kbps to 2.5 Mbps
FAST
Data rate 18 kbps to 5.0 Mbps
FAST
Data rate 18 kbps to 10.0 Mbps
FAST
Data rate 18 kbps to 15.0 Mbps
FAST
Data rate 18 kbps to 20.0 Mbps
FAST
Data rate 18 kbps to 25.0 Mbps
FAST
Symbol rate 37 ksps to 300 ksps
HARDWARE / FAST
Symbol rate 37 ksps to 1200 ksps
HARDWARE / FAST
Symbol rate 37 ksps to 4100 ksps
HARDWARE / FAST
Forward Error Correction
Data Rate (base function)
Data Rate (LDPC/TPC function)
Modulation
DoubleTalk Carrier-in-Carrier
VersaFEC Adaptive Coding
and Modulation (ACM)
1–7
CDM-625 Advanced Satellite Modem
Introduction
Revision 15
MN-CDM625
Option
Description and Comments
Installation Method
G.703 Clock Extension
G.703 Clock Extension
FAST
IP Packet
Processor
Card
IP Packet Processor daughter card
HARDWARE
Payload
Compression
Data rate up to 5 Mbps or Symbol rate up to 1200 ksps (ACM)
FAST
Data rate up to 10 Mbps or Symbol rate up to 4100 ksps (ACM)
FAST
Data rate up to 15 Mbps or Symbol rate up to 4100 ksps (ACM)
FAST
Data rate up to 20 Mbps or Symbol rate up to 4100 ksps (ACM)
FAST
Data rate up to 25 Mbps or Symbol rate up to 4100 ksps (ACM)
FAST
Data rate up to 5 Mbps or Symbol rate up to 1200 ksps (ACM)
FAST
Data rate up to 10 Mbps or Symbol rate up to 4100 ksps (ACM)
FAST
Data rate up to 15 Mbps or Symbol rate up to 4100 ksps (ACM)
FAST
Data rate up to 20 Mbps or Symbol rate up to 4100 ksps (ACM)
FAST
Data rate up to 25 Mbps or Symbol rate up to 4100 ksps (ACM)
FAST
Advanced QoS
Advanced QoS
FAST
AES Encryption
Tx Packet Encryption / Rx Packet Decryption
FAST
Advanced Network Timing
(ANT)
IEEE-1588v2 Precision Timing Protocol (PTP)
REV 2 HARDWARE /
FAST
BUC Power Supplies
24V, 100W
HARDWARE
48V, 150W @ 50° C (180W@ 35° C)
HARDWARE
100-240 VAC nom.
90-264 VAC max.
HARDWARE
43-60 VDC nom.
36-60 VDC max.
HARDWARE
Header
Compression
Main Power Supplies
1–8
CDM-625 Advanced Satellite Modem
Introduction
1.3.8
Revision 15
MN-CDM625
Supporting Hardware and Software
Redundancy Support: Comtech EF Data provides redundant operations support to the CDM-625
as follows:
•
For 1:1 redundancy applications, via its low-cost external CRS-170A L-Band and CRS-180
70/140 MHz IF 1:1 Redundancy Switches.
•
For M:N redundancy (hub) applications, via its external CRS-300 1:10 Redundancy Switch or
the CRS-500 M:N Redundancy System.
Transceiver Support: The unit is a companion product for Comtech EF Data’s CSAT-5060 and
KST-2000A/B RF Transceivers. The modem incorporates a Frequency Shift-keying (FSK) serial link
that can be activated on the Rx-IF port for the purpose of communicating with a transceiver, if
connected. In this manner, you may configure, monitor and control the transceiver using either
the unit’s front panel display and keypad or any of its remote control interfaces. The EDMAC
channel may also be used to convey M&C data to a transceiver at the distant end of a satellite
link, if it is connected to a CDM-625.
BUC Support: The unit incorporates an FSK serial link that can be activated on the Tx-IF port for
the purpose of communicating with an FSK-capable “smart” BUC. This link is designed to be
compatible with the Global VSAT Forum/ND SatCom specification. In this manner, you may
configure, monitor and control the BUC using either the unit’s front panel display and keypad or
any of its remote control interfaces.
Additionally, Comtech EF Data provides for an "Advanced FSK" for use with its LPOD BUCs, reusing the existing FSK channel to pass additional "proprietary" commands to expand front panel
user control. The EDMAC channel can be used to convey M&C interface to a BUC at the distant
end of a satellite link, if it is connected to a CDM-625.
1–9
CDM-625 Advanced Satellite Modem
Introduction
1.3.9
Revision 15
MN-CDM625
Physical Features
1.3.9.1
Dimensional Envelope
All dimensions are in inches. Dimensions shown in parentheses are in metric units (mm).
Figure 1-2. CDM-625 Dimensional Envelope
1–10
CDM-625 Advanced Satellite Modem
Introduction
1.3.9.2
Revision 15
MN-CDM625
Front Panel
Chapter 5. FRONT PAN EL OPERATION
Feature
Description
Function
LED Indicators
The LEDs indicate, in a summary fashion, the status of the modem.
5.1.1
2
Keypad
The keypad comprises six individual keyswitches. The keys have a
positive ‘click’ action that provides tactile feedback. Enter data via
the k eypad. D ata, pr ompts, and m essages ar e di splayed on t he
VFD.
5.1.2
3
Vacuum
Fluorescent
Display (VFD)
The V FD i s an ac tive di splay s howing t wo l ines of 40 characters
each. It produces a blue light with adjustable brightness. Nested
menus display all available options and pr ompt you to carry out a
required action.
5.1.3
1
Chapter
Figure 1-3. CDM-625 Front Panel Features
1–11
CDM-625 Advanced Satellite Modem
Introduction
1.3.9.3
Revision 15
MN-CDM625
Rear Panel
Chapter 3. REAR PANEL CONNECTORS AND PINOUTS
Figure 1-4. CDM-625 Rear Panel Features
(Top) Standard AC Chassis (CEFD P/N PL/12587-1)
(Bottom) Optional 48VDC Chassis (CEFD P/N PL/12587-2)
Figure 1-4 shows the rear panel of the modem. External cables are attached to connectors on
the rear panel of the unit. They comprise:
Connector Group
(Chapter)
IF
(Sect. 3.2.1)
Terrestrial Data
(Sect. 3.2.2)
Name
Connector Type
BNC female (70/140MHz band)
Rx
Type ’N’ female (L-Band)
BNC female (70/140MHz band)
Tx
Type ’N’ female (L-Band)
Data Interface
Balanced G.703
Auxiliary G.703
Unbalanced Out
G.703
Unbalanced In
Data
IDI
DDO
Utility
(Sect. 3.2.3
Ground / Power
(Sect 3.3)
10/100 Ethernet
IDR Data/Alarms/Audio
ESC
Remote Control
Alarms
PMSI
1:1 Control
External Reference
Ground
AC Power (Standard)
DC Power (Optional)
25-pin Type ‘D’ female
9-pin Type ‘D’ female
9-pin Type ‘D’ female
BNC female
BNC female
BNC female
BNC female
(4X) RJ-45 female
44-pin High Density Type ‘D’ female
9-pin Type ‘D’ female
9-pin Type ‘D’ male
15-pin Type ‘D’ male
9-pin Type ‘D’ female
9-pin Type ‘D’ female
BNC female
#10-32 stud – See Sect. 3.3.1
See Sect. 3.3.2
See Sect. 3.3.3
Function
IF Input
IF Output
Serial synchronous data input/output
G.703, D&I or D&I++; Quad E1 Ports 1 & 2
Quad E1 Ports 3 & 4
Receive G.703 (IDO); ASI
Transmit G.703 (DDI); ASI
Insert Data In / Sub-rate Auxiliary Tx G.703 In
Drop Data Output / Sub-rate Auxiliary Rx
G.703 Out
10/100 BaseT management and data
Intelsat Open Network auxiliary signals
ESC input/output (RS232/485)
Serial Remote Interface (RS232/485)
Form C Alarms (relay closures)
Pre-Mapped Symbol Interface (CnC)
Connection to External 1:1 Controller
Input/output
Common Chassis Ground
Chassis power
Chassis power
The European EMC Directive 2004/108/EEC (EN 55022, EN 50024) requires using
properly shielded cables for DATA I/O. These cables must be double-shielded from
end-to-end, ensuring a continuous ground shield.
1–12
CDM-625 Advanced Satellite Modem
Introduction
1.4
1.4.1
Summary of Specifications
Modulator
Modulation
Symbol rate range
Data rate range
Operating frequency
Operating modes
FEC
Revision 15
MN-CDM625
BPSK, QPSK, OQPSK, 8PSK, 8-QAM and 16-QAM
18 ksps to 12.5 Msps
18 kbps to 25 Mbps. See Sect. 1.4.7
50-180 MHz (BNC connector) AND 950-2000 MHz (Type N connector), 100 Hz resolution
Note: Firmware Ver. 1.4.1 and later increases L-Band range to 950-2000 MHz.
Stability ±0.06 ppm (±6 x 10-8) 0-50oC (32-122oF), when using internal reference
Open Network, per Intelsat IESS-308/309/310/314 (IDR, IBS/SMS)
E1/T1 Drop and Insert
Transparent, Closed Network, IESS-315 (VSAT Turbo)
Proprietary EDMAC framed mode:
* 5% overhead – EDMAC (data rates < 2.048 Mbps all modes except BPSK Turbo, Rate 21/44 QPSK Turbo)
* 1.6% overhead– EDMAC-2 (rates >2.048 Mbps and all Rate 21/44, 5/16 Turbo)
* EDMAC-3 – for SNMP Proxy – same as EDMAC
R-S Outer Codec
Turbo Product Codec – 2nd Generation (optional plug-in module)
LDPC Codec (optional plug-in module – includes all 2nd Generation TPC modes
VersaFEC® Codec (optional plug-in module – short-block, low latency and ultra-low-latency LDPC)
VersaFEC® Adaptive Coding and Modulation – IP interface only – max. symbol rate = 4100 ksps
Automatic Uplink Power Control (AUPC) mode
High Rate ESC, Enhanced ESC (ESC++)
Enhanced Drop & Insert (D&I++)
Quad E1 Drop & Insert (QDI) – concatenates time slots from up to four E1 G.703 streams, Framed QDI
DoubleTalk® Carrier-in-Carrier® mode (optional plug-in module)
None: Uncoded BPSK/QPSK/OQPSK
Viterbi: k=7, per IESS-308/309
BPSK: Rate 1/2
QPSK/OQPSK: Rate 1/2, Rate 3/4 and Rate 7/8
16-QAM: Rate 3/4 and Rate 7/8 (Viterbi plus Reed-Solomon only)
Sequential:
BPSK: Rate 1/2
QPSK/OQPSK: Rate 1/2, Rate 3/4 and Rate 7/8
Reed-Solomon (Open Network):
IDR modes:
225/205 for T1
219/201 for E1 and IESS-310 mode,
194/178 for T2 and E2
IBS modes:
126/112 and 219/201 for IESS-310 mode
Reed-Solomon (Closed Network):
220,200 outer code (transparent mode)
225,205 outer code (transparent mode, EF Data compatible, V.35 scrambling)
126,112 outer code (transparent mode, IBS parameters, D&I++ mode)
219,201 outer code (transparent mode, IESS-310 parameters)
200,180 outer code (EDMAC modes)
Interleaver depth = 4 or 8 (depending on mode)
8PSK/TCM Rate 2/3 (Trellis): Per IESS-310
Turbo Product Codec, 2nd Generation (Optional plug-in card, includes LDPC modes):
Rate 5/16 (2-dimensional) and Rate 21/44 (3-dimensional) BPSK
Rate 21/44 QPSK/OQPSK (aka 1/2) – 3 dimensional
Rate 3/4 QPSK/OQPSK/8PSK/8-QAM/16-QAM – 2-dimensional
Rate 7/8 QPSK/OQPSK/8PSK/8-QAM/16-QAM – 2-dimensional
Rate 0.95 QPSK/OQPSK/8PSK/8-QAM/- 2-dimensional TPC (exact Code Rate is actually 17/18, or 0.944)
Low Density Parity Check (LDPC) Codec (Optional plug-in card):
Rate 1/2 BPSK/QPSK/OQPSK
Rate 2/3 QPSK/OQPSK/8PSK/8-QAM
Rate 3/4 QPSK/OQPSK/8PSK/8-QAM/16-QAM
VersaFEC Codec (Optional plug-in card – short-block, low latency LDPC):
Rate 0.488 BPSK (also 0.493 BPSK Ultra-Low-Latency – requires Firmware 1.5.4 or higher)
Rate 0.533, 0.631, 0.706, 0.803 QPSK (0.493, 0.654, 0.734 Ultra-Low-Latency – requires Firmware 1.5.4 or higher)
Rate 0.642, 0.711, 0.780 8-QAM (also 0.576 8-QAM Extended CCM – requires Firmware 1.5.4 or higher)
Rate 0.731, 0.780, 0.829, 0.853 16-QAM (also 0.644 16-QAM Extended CCM – requires Firmware 1.5.4 or higher)
1–13
CDM-625 Advanced Satellite Modem
Introduction
Transmit filtering
Scrambling
External Reference
Harmonics/spurious
Transmit on/off ratio
Output phase noise
Firmware prior to 1.4.0: Root-Raised Cosine, alpha = 0.35 (fixed)
Firmware 1.4.0 or later: Root-Raised Cosine, alpha = 0.35 and 0.25 – front panel/software selectable
See graph of output spectrum provided at the end of this section
IDR Mode, no RS, – per ITU V.35 (Intelsat variant)
IBS mode, no RS – per IESS-309, externally frame synchronized
Transparent Closed Network mode, no RS or Turbo coding – per ITU V.35 (Intelsat variant)
EDMAC mode, no RS coding – externally frame synchronized – proprietary
Turbo Product Code/LDPC/VersaFEC modes – externally frame synchronized – proprietary
All RS modes – externally frame synchronized per IESS-308/309/310
As an input: 1, 2, 5 or 10MHz –6dBm to +10dBm (nom. 50/75 Ω, BNC female connector)
As an output: 10MHz, 2.7V peak-to-peak ±0.4V, low impedance output
(The Ext. reference phase locks Tx and Rx synthesizers, and all baseband clock generation)
Better than –60 dBc/4 kHz (typically <-65 dBc/4kHz)
measured from 1-500 MHz (50-180 MHz band)
measured F0 ±500 MHz (950-2000 MHz band)
-60 dBc minimum
< 0.480rms double sided, 100 Hz to 1MHz (minimum of 16 dB better overall than the INTELSAT IESS-308/309 requirement)
dB/Hz
-63.0
-73.0
-83.0
-93.0
Output power
Power accuracy
Output impedance
Output connector
Clocking options
External TX Carrier Off
BUC Reference
(10 MHz):
Phase Noise
BUC Supply Voltage
BUC Current Monitor
Tx Carrier ON Delay
BUC Monitoring
Revision 15
MN-CDM625
Frequency Offset
100 Hz
1 kHz
10 kHz
100 kHz
Fundamental AC line spurious is –42 dBc or lower
The sum of all other single sideband spurious, from 0 to 0.75 x symbol rate, is –48 dBc or lower
950-2000 MHz band: 0 to –40 dBm, 0.1 dB steps – manual mode. See AUPC section also
50-180 MHz band: 0 to –25 dBm, 0.1 dB steps – manual mode. See AUPC section also
950-2000 MHz band:
±0.7dB over frequency, data rate, modulation type and temperature range 15-35oC
±1.0 dB over frequency, data rate, modulation type and temperature range 0-50oC
50-180 MHz band:
±0.5dB over frequency, data rate, modulation type and temperature range 15-35oC
±0.8dB over frequency, data rate, modulation type and temperature range 0-50oC
950-2000 MHz band: 50Ω, 19 dB minimum return loss (21 dB typical)
50-180 MHz band: 50Ω, or 75Ω 16 dB minimum return loss (18 dB typical)
950-2000 MHz band: Type N female
50-180 MHz band: BNC female
Internal, ±0.06 ppm (SCT)
External, locking over a ±100 ppm range (TT)
Loop timing (Rx satellite clock) – supports asymmetric operation – Rx and Tx data rates need not be identical
External Clock
G.703 Clock Extension mode – internal ST clock can be slaved to an external T1 or E1 G.703 signal, and a G.703 timing
signal re-constituted at the distant end of the link, regardless of the actual link data rate
By TTL 'low' signal or external contact closure – hardware function automatically over-rides processor
On center conductor of L-Band output connector; 10.0 MHz ± 0.06 ppm (internal reference selected)
0.0 dBm, ± 3 dB; programmable ON/OFF
Source: either Internal Modem Reference or External Reference (10 MHz)
dB/Hz
Frequency Offset
-105
10 Hz
-125
100 Hz
-138
1 kHz
-148
10 kHz
-150
100 kHz
Standard unit has no BUC supply.
Optional BUC Supply:
•
24VDC, 4.17 Amps max., 100W
•
48VDC, 3.125 Amps max., 150W @ 50oC (180W @ 30oC)
•
Supplied through Tx IF center conductor and selectable ON/OFF via M&C control.
Minimum/maximum programmable current alarm thresholds.
Selectable feature power on to allow internal ovenized reference to stabilize before turning on Tx carrier. Intelligent algorithm
minimizes delay time based on internal temperature at power-up.
Power level, temperature, power class, PLL lock.
Uses ND Satcom/Global VSAT Forum specification for FSK control and monitoring.
1–14
CDM-625 Advanced Satellite Modem
Introduction
0.0
0.1
0.2
0.3
Revision 15
MN-CDM625
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
Symbol Rate, Rs
0
-5
Comtech EF Data
CDM-625 Transmit
Power Spectral
Density, referred to
symbol rate
-10
-15
Note: Tx Alpha = 0.25 requires
Firmware v1.4.0 or higher
-20
-25
-30
-35
Tx Alpha = 0.35
-40
CDM-625
Modulator
typically < -50 dB, and
guaranteed to be
< -45 dB at offsets
> 0.75 Rs
-45
-50
Spectral
density, dB
Intelsat
IESS
308/309
Limit
Intelsat
IESS
308/309
Limit
Tx Alpha = 0.25
-55
1.4.2
Demodulator
Note: Data rate range, operating modes, descrambling, input impedance/return loss etc, as per Sect. 1.4.1 Modulator.
Input power range,
desired carrier
Maximum Composite
Operating Level
Absolute Maximum, No
Damage
FEC
Adaptive Equalizer
Acquisition range
Acquisition time
950-2000 MHz (950-1950 MHz w/Firmware prior to Ver. 1.4.1) band:
–130 + 10log(symbol rate) to –80 + 10 log(symbol rate) dBm
50-180 MHz band:
–105 + 10 log(symbol rate) to –70 + 10 log(symbol rate) dBm
950-2000 MHz band:
102 – 10 log(symbol rate, desired carrier) dBc, +10 dBm max., with the additional requirement that within ±10
MHz of the desired carrier, composite power is ≤ +30 dBc.
50-180 MHz band:
94 – 10 log(symbol rate, desired carrier) dBc, +10 dBm max., with the additional requirement that
within ±10 MHz of the desired carrier, composite power is ≤ +30 dBc
+20 dBm
Viterbi: 3-bit soft decision
Sequential: 2-bit soft decision
Trellis: Per IESS-310
Reed-Solomon(Open Network): Per IESS-308/309/310
Reed-Solomon(Closed Network): Proprietary
Turbo Product Codec: 6-bit soft decision, proprietary
LDPC: 5-bit soft decision, proprietary
VersaFEC: 6-bit soft decision, proprietary
5-tap design, selectable on/off
Programmable in 1kHz increments, and subject to the following:
Below 64 ksymbols/sec: ±1 to ±(Rs/2) kHz, where Rs = symbol rate in ksymbols/sec
Between 64 and 389 ksymbols/sec: ±1 up to a max. of ±32kHz
Above 389 ksymbols/sec: ±1 to ±(0.1Rs) kHz, up to a max. of ±200 kHz
Highly dependent on data rate, FEC rate, and demodulator acquisition range.
Examples: 120 ms average at 64 kbps, R1/2 QPSK, ±10 kHz acquisition sweep range, 6dB Eb/No
2 s average at 18 kbps, R1/2 QPSK, ±10 kHz, 6dB Eb/No
Note: The use of Reed-Solomon, TPC, LDPC, VersaFEC increases acquisition time, due to the additional time
taken for these decoders to declare synchronization.
1–15
CDM-625 Advanced Satellite Modem
Introduction
Revision 15
MN-CDM625
Clock tracking range
Clocking modes
±100 ppm min
Full range of clocking options supported – see plesiochronous/Doppler buffer section
On center conductor of L-Band input connector, selectable ON/OFF. Level: –3dBm ±3 dB.
Source: either Internal modem reference or External reference
LNB 10 MHz Reference
Performance: For phase noise, refer to L-Band modulator 10 MHz. Frequency stability same as the modulator 10
MHz reference.
On center conductor of L-Band input connector, selectable ON, OFF,13V, 18V per DiSEq 4.2 and 24VDC at 500
LNB Voltage
mA max.
LNB Current Alarm
Programmable MIN and MAX current alarms.
For BER=10-X
Rate – Guaranteed Eb/No (typical value in parentheses)
VITERBI BER performance
Rate 1/2 (B, Q, OQ)
Rate 3/4 (Q, OQ)
Rate 7/8 (Q, OQ)
(met in the presence of two
BER=10-5
5.4 dB (4.9 dB)
6.8 dB (6.3 dB)
7.7 dB (7.2 dB)
adjacent carriers, each 7 dB
BER=10-6
6.0 dB (5.5 dB)
7.4 dB (6.9 dB)
8.4 dB (7.9 dB)
higher than the desired
BER=10-7
6.7 dB (6.2 dB)
8.2 dB (7.7 dB)
9.0 dB (8.6 dB)
carrier)
VITERBI and RS 220,200 or
200,180 Outer Code BER
(with two adjacent carriers,
each 7 dB higher than the
desired carrier)
8PSK/TCM CODEC BER
(with two adjacent carriers,
each 7 dB higher than the
desired carrier)
16-QAM VITERBI/220,200
RS BER (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
SEQUENTIAL at 64 kbps
BER performance (met in
the presence of two
adjacent carriers, each 7 dB
higher than the desired
carrier)
SEQUENTIAL at 2048 kbps
BER performance (met in
the presence of two
adjacent carriers, each 7 dB
higher than the desired
carrier)
SEQUENTIAL and RS
220,200 Outer Code at 512
kbps BER performance
(with two adjacent carriers,
each 7 dB higher than the
desired carrier)
TURBO PRODUCT CODEC
BER (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
TURBO PRODUCT CODEC
BER (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
Rate 1/2 (B, Q, OQ)
4.3 dB (4.0 dB)
4.4 dB (4.1 dB)
4.5 dB (4.2 dB)
Rate 3/4 (Q, OQ)
5.6 dB (4.7 dB)
5.8 dB (4.8 dB)
6.0 dB (5.2 dB)
Rate 2/3 8PSK/TCM
BER=10-4
BER=10-6
BER=10-8
7.9 dB (7.2 dB)
9.5 dB (8.7 dB)
10.4 dB (9.5 dB)
Rate 3/4 16-QAM
Viterbi/RS
8.1 dB (7.5 dB)
8.6 dB (8.0 dB)
Rate 1/2 (B, Q, OQ)
4.4 dB (4.0 dB)
5.1 dB (4.6 dB)
5.7 dB (5.2 dB)
Rate 2/3 8PSK/TCM
with concatenated RS
6.3 dB (5.4 dB)
6.7 dB (5.8 dB)
6.9 dB (6.0 dB)
Rate 7/8 16-QAM
Viterbi/RS
9.5 dB (9.0 dB)
10.1 dB (9.5 dB)
Rate 3/4 (Q, OQ)
5.2 dB (4.7 dB)
5.8 dB (5.4 dB)
6.4 dB (6.0 dB)
Attention: For 126,112
Reed-Solomon, add 0.2 dB to
these figures
Rate 7/8 (Q, OQ)
6.2 dB (5.7 dB)
7.0 dB (6.6 dB)
7.9 dB (7.4 dB)
BER=10-4
BER=10-6
BER=10-8
Rate 1/2 (Q, OQ)
5.0 dB (4.6 dB)
5.8 dB (5.4 dB)
6.7 dB (6.3 dB)
Rate 3/4 (Q, OQ)
5.6 dB (5.2 dB)
6.4 dB (6.0 dB)
7.3 dB (6.8 dB)
Rate 7/8 (Q, OQ)
6.5 dB (6.0 dB)
7.6 dB (7.2 dB)
8.7 dB (8.2 dB)
BER=10-4
BER=10-6
BER=10-8
Rate 1/2 (B, Q, OQ)
4.5 dB (4.1 dB)
4.7 dB (4.3 dB)
4.9 dB (4.6 dB)
Rate 3/4 (Q, OQ)
5.0 dB (4.6 dB)
5.2 dB (4.8 dB)
5.4 dB (5.0 dB)
BER=10-6
BER=10-7
BER=10-8
Rate 21/44 (B, Q, OQ)*
3.1 dB (2.9 dB)
3.3 dB (3.1 dB)
3.5 dB (3.3 dB)
BER=10-6
BER=10-7
BER=10-8
* See Notes 1 and 2
Rate 3/4 (Q, OQ)
3.8dB (3.4dB)
4.1dB (3.7dB)
4.4dB (4.0dB)
BER=10-5
BER=10-6
BER=10-7
BER=10-5
BER=10-7
BER=10-8
BER=10-6
BER=10-8
1–16
Rate 7/8 (Q, OQ)
6.5 dB (6.0 dB)
6.7 dB (6.2 dB)
6.9 dB (6.5 dB)
Rate 7/8 (Q, OQ)
5.9 dB (5.5 dB)
6.1 dB (5.7 dB)
6.3 dB (5.9 dB)
Rate 5/16 (B)
2.7 dB (2.5dB)
2.9 dB (2.7dB)
3.1 dB (2.9dB)
Rate 3/4 (8PSK, 8-QAM)
6.4 dB (6.0 dB)
6.7 dB (6.3 dB)
7.1 dB (6.7 dB)
Rate 3/4 (16-QAM)
7.8 dB (7.4 dB)
8.1 dB (7.7 dB)
8.5 dB (8.2 dB)
CDM-625 Advanced Satellite Modem
Introduction
TURBO PRODUCT CODEC
BER (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
TURBO PRODUCT CODEC
BER (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
LDPC CODEC BER (with
two adjacent carriers, each
7 dB higher than the
desired carrier)
LDPC CODEC BER (with
two adjacent carriers, each
7 dB higher than the
desired carrier)
LDPC CODEC BER (with
two adjacent carriers, each
7 dB higher than the
desired carrier)
LDPC CODEC BER (with
two adjacent carriers, each
7 dB higher than the
desired carrier)
VersaFEC CODEC BER
BPSK (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
VersaFEC CODEC BER
QPSK (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
VersaFEC CODEC BER
8-QAM (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
VersaFEC CODEC BER
16-QAM (with two adjacent
carriers, each 7 dB higher
than the desired carrier)
VersaFEC CODEC –
Extended CCM BER (with
two adjacent carriers, each
7 dB higher than the
desired carrier)
Ultra-Low-Latency (ULL)
CODEC BER (with two
adjacent carriers, each 7
dB higher than the desired
carrier)
For BER=10-X
BER=10-5
BER=10-8
Revision 15
MN-CDM625
Rate – Guaranteed Eb/No (typical value in parentheses)
Rate 7/8 (Q, OQ)
Rate 7/8 (8PSK, 8-QAM)
Rate 7/8 (16-QAM)
4.3 dB (4.0 dB)
7.0 dB (6.7 dB)
8.1 dB (7.7 dB)
4.5 dB (4.2 dB)
7.2 dB (6.8 dB)
8.4 dB (8.1 dB)
BER=10-5
BER=10-9
Rate 0.95 (Q, OQ)
6.4 dB (6.0 dB)
6.7 dB (6.3 dB)
6.9 dB (6.5 dB)
Rate 1/2 (B, Q, OQ)* LDPC
2.0 dB (1.7 dB)
2.3 dB (2.0 dB)
* See Note 2
Rate 2/3 8PSK LDPC
--5.7 dB (5.2 dB)
BER=10-5
BER=10-9
Rate 2/3 8-QAM LDPC
4.6 dB (4.2 dB)
5.0 dB (4.6 dB)
BER=10-5
BER=10-9
Rate 3/4 16-QAM LDPC
6.8 dB (6.2 dB)
7.1 dB (6.8 dB)
BER=10-5
BER=10-8
Rate 0.488
2.4 dB (2.1 dB)
2.7 dB (2.4 dB)
BER=10-6
BER=10-7
BER=10-8
BER=10-5
BER=10-9
Rate 0.95 (8PSK, 8-QAM)
9.6 dB (9.2 dB)
10.1 dB (9.7 dB)
10.6 dB (10.2 dB)
Rate 2/3 (Q, OQ) LDPC
2.3 dB (2.0 dB)
2.7 dB (2.3 dB)
Rate 3/4 (Q, OQ) LDPC
3.0 dB (2.6 dB)
3.3 dB (3.0 dB)
Rate 3/4 8PSK LDPC
5.6 dB (5.2 dB)
6.0 dB (5.6 dB)
Rate 3/4 8-QAM LDPC
5.6 dB (5.2 dB)
6.0 dB (5.6 dB)
BER=10-5
BER=10-8
Rate 0.533 QPSK
2.3 dB (2.0 dB)
2.5 dB (2.2 dB)
Rate 0.631 QPSK
2.8 dB (2.5 dB)
3.0 dB (2.7 dB)
Rate 0.706 QPSK
3.3 dB (3.0 dB)
3.7 dB (3.4 dB)
Rate 0.803 QPSK
3.8 dB (3.5 dB)
4.1 dB (3.8 dB)
BER=10-5
BER=10-8
Rate 0.642 8-QAM
4.6 dB (4.3 dB)
4.9 dB (4.6 dB)
Rate 0.711 8-QAM
5.2 dB (4.9 dB)
5.5 dB (5.2 dB)
Rate 0.780 8-QAM
5.6 dB (5.3 dB)
6.0 dB (5.7 dB)
BER=10-5
BER=10-8
Rate 0.731 16-QAM
6.4 dB (6.1 dB)
6.6 dB (6.3 dB)
Rate 0.780 16-QAM
7.0 dB (6.7 dB)
7.3 dB (7.0 dB)
Rate 0.829 16-QAM
7.5 dB (7.2 dB)
7.8 dB (7.5 dB)
Rate 0.853 16-QAM
8.0 dB (7.7 dB)
8.3 dB (8.0 dB)
BER=10-5
BER=10-8
Rate 0.576 8-QAM
4.5 dB (4.2 dB)
4.9 dB (4.6 dB)
Rate 0.644 16-QAM
6.4 dB (6.1 dB)
6.9 dB (6.6 dB)
BER=10-5
BER=10-8
Rate 0.493 BPSK
3.1 dB (2.8 dB)
3.7 dB (3.4 dB)
Rate 0.493 QPSK
3.1 dB (2.8 dB)
3.7 dB (3.4 dB)
Rate 0.654 QPSK
3.6 dB (3.3 dB)
4.2 dB (3.9 dB)
Rate 0.734 QPSK
4.1 dB (3.8 dB)
4.7 dB (4.4 dB)
Notes:
1. Rate 21/44 QPSK is shown as Rate 1/2 on the Front Panel display, etc.
2. The demod acquisition and tracking threshold for OQPSK is approx 1 dB worse than the QPSK case in this mode.
1–17
CDM-625 Advanced Satellite Modem
Introduction
Plesiochronous/
Doppler Buffer
Revision 15
MN-CDM625
Selectable size of 64 to 262,144 bits, in 16-bit steps (with added limitations for G.704 frame boundaries).
Size selection is displayed in bytes and milliseconds.
Supports asymmetric operation – when buffer is clocked from Tx clock, Rx and Tx rates do not need to be
identical.
Eb/No estimate:
•
2 to 10 dB with ±0.3 dB accuracy
•
0 to 16 dB with ±0.5 dB accuracy
Corrected Bit Error Rate, 1E-3 to 1E-10
Frequency offset, ±32 kHz range, (or 200 kHz range, depending on band and symbol rate) 100 Hz resolution
Buffer fill state, in percent
Receive signal level:
•
950-2000 MHz band accuracy: ±3 dB
•
50-180 MHz band accuracy: ±2 dB
Monitor Functions
0
Carrier Level in dBm
-10
Maximum
-20
-30
-40
-50
-60
-70
Minimum
-80
-90
10
100
1000
10000
100000
Symbol Rate in ksps
Figure 1-5. Rx Carrier Level vs. Symbol Rate – L-Band (950-2000 MHz)
10
Carrier Level in dBm
0
Maximum
-10
-20
-30
-40
Minimum
-50
-60
-70
-80
10
100
1000
10000
100000
Symbol Rate in ksps
Figure 1-6. Rx Carrier Level vs. Symbol Rate – IF Band (50-180 MHz)
1–18
CDM-625 Advanced Satellite Modem
Introduction
1.4.3
Revision 15
MN-CDM625
Data Interfaces
Primary Data
(4 selectable modes)
RS-422/EIA-530 DCE (Rates up to 14 Mbps)
(also supports X.21 DCE & DTE up to 2.048 Mbps and 8k ESC orderwire for IDR)
V.35 DCE (Rates up to 14 Mbps)
LVDS serial (Rates up to 25 Mbps)
HSSI serial (Rates up to 25 Mbps)
25-pin D-sub (female)
G.703 (Tx In, Drop Out,
Insert In, Rx Out)
1.544 Mbps T1 (Balanced 100 Ω)
6.312 Mbps T2 (unbalanced 75 Ω or balanced 110 Ω)
2.048 Mbps E1 (unbalanced 75 Ω or balanced 120 Ω)
8.448 Mbps E2 (unbalanced 75 Ω)
Note: All Drop and Insert modes are a FAST option.
9-pin D-sub (female)
or BNC (female)
ASI
Uses G.703 (Tx In, Rx Out) ports
BNC (female)
Auxiliary G.703
(used for Quad D&I modes)
Two additional 2.048 Mbps E1 ports (balanced 120 Ω)
Note: All Drop and Insert modes are a FAST option.
9-pin D-sub (female)
External Reference In/Out
As an input:
1, 2, 5 or 10MHz –6dBm to +10dBm (nom. 50/75 Ω)
As an output:
10MHz, 2.7V peak-to-peak +/- 0.4V, low impedance output
BNC (female)
Overhead Data
RS-422 octet clocks for IDR ESC & IBS
RS-422 IDR 64 kbps ESC data & clock
44-pin High-density
D-sub (male)
IDR BWA
IDR BWA Inputs/4 backward alarm Form C relay outputs
Inputs/Outputs
2 audio channels, each occupying 32 kbps bandwidth as part of IDR overhead or as
a 64 kbps primary data rate option.
ADPCM Audio Interface
600 Ω balanced – 0 dBm0 nom., –6 to +8 dB, 2 dB steps
Modem Alarms
Relay outputs (Tx, Rx & unit faults)
Demodulator I & Q test outputs (constellation)
Demodulator Rx Signal Level output (0 to 2.5V)
External carrier off input
15-pin D-sub (male)
ESC (Overhead)
Standard IBS ESC interfaces
RS-232/485 High Rate ESC data
RS-232/485 ESC++ data
9-pin D-sub (female)
Remote Control
RS-232 or RS-485 modem control and monitoring
9-pin D-sub (male)
PMSI Interface
Pre-mapped Symbol interface
(used by DoubleTalk Carrier-in-Carrier function)
9-pin D-sub (female)
1:1 Control
Control interface for CRS170A/CRS180 1:1 Redundancy unit
9-pin D-sub (male)
Ethernet
4 ports of 10/100 BaseT auto-sensing full/half duplex Ethernet
RJ-45
1.4.4
Automatic Uplink Power Control (AUPC)
Operating Mode
Requires Closed Network Framed mode (EDMAC, D&I++, Enhanced D&I, or ESC++) for transport of
Eb/No information from remote modem (EDMAC can be enabled or disabled)
Target Eb/No range
0 to 14.9 dB at remote demod (default is 4.0 dB)
Maximum AUPC range
0 to 9 dB (default is 3 dB)
Monitor functions
Remote demod Eb/No
Tx power level increase
(front panel or via remote control interface)
1–19
CDM-625 Advanced Satellite Modem
Introduction
1.4.5
Revision 15
MN-CDM625
DoubleTalk® Carrier- in-Carrier® (CnC)
Operating Mode
Power Spectral Density Ratio and
CnC Ratio
Requires the two links to share a common carrier frequency (Outbound and Inbound symbol rates do
not have to be equal)
• BSPK/QPSK/8PSK/8-QAM: –7 dB to +11 dB (ratio of power spectral density, outbound interferer
to desired inbound)
• 16-QAM: –7 dB to +7 dB (ratio of power spectral density, outbound interferer to desired inbound)
Note: With asymmetric carriers, the absolute power ratio (or CnC ratio) would be different,
depending on the ratio of the symbol rates.
Example:
Outbound interferer = 1 Msymbols/sec
Desired Inbound = 500 ksymbols/sec
Ratio of power spectral density = +7 dB
Absolute power ratio (CnC Ratio) = +7dB + (10log Outbound/desired symbol rate) = +10 dB
Maximum Symbol Rate Ratio
3:1 (TX:RX or RX:TX)
Inbound/Outbound frequency
uncertainty
Within the normal acquisition range of the demod, as follows:
• Below 64 ksymbols/sec: ±1 to ±(Rs/2) kHz, where Rs = symbol rate in ksymbols/sec
• Between 64 and 389 ksymbols/sec: ±1up to a max. of ±32kHz
• Above 389 ksymbols/sec: ±1 to ±(0.1Rs) kHz, up to a max. of ±200 kHz
Delay range
0-330 ms
Eb/No Degradation
(equal Inbound/Outbound power
spectral density)
• BPSK = 0.3dB
• QPSK = 0.3dB
• OQPSK = 0.3dB
• 8PSK = 0.5dB
• 8-QAM = 0.4dB
• 16-QAM = 0.6dB
For +10 dB power spectral density ratio (outbound interferer 10 dB higher than desired inbound) add
an additional 0.3 dB
• Delay, in milliseconds
• Frequency offset (between outbound interferer and desired inbound). 100 Hz resolution
• CnC Power Ratio, in 0.1 dB (ratio of absolute power, outbound interferer to desired inbound)
• Power Spectral Density Ratio, in 0.1 dB
Monitor Functions
CnC Monitor Accuracy
±0.1 dB for symmetric symbol rate
1–20
CDM-625 Advanced Satellite Modem
Introduction
1.4.6
Revision 15
MN-CDM625
Framing Summary
Framing Mode Overhead added
Available data rates
and format
Overhead
components
Transparent
None
All rates and formats
None
EDMAC
To 2 Mbps: 5%
Above 2 Mbps: 1.6%
(see Note 2)
All rates and formats
EDMAC-2
EDMAC-3
IDR
IBS
D&I
D&I++
ESC++
QDI
Framed QDI
Remote control link
between modems’
processor plus AUPC
Remote control link
1.6%
All rates and formats
between modems’
processor plus AUPC
Remote control link
To 2 Mbps: 5%
between modems’
All rates and formats
Above 2 Mbps: 1.6%
processor plus AUPC
EIA-422 ESC
(8 kbps)
T1, E1, T2 and E2; all EIA-422 ESC
Fixed 96 kHz
(64 kbps or
formats
2 audio links)
4 BW alarms
EIA-232 Earth station
1/15 of front panel data 64 to 2048 kbps only; link at 1/480th of
primary data rate. One
rate
all formats
BW alarm
EIA-232 Earth station
1/15 of front panel data
Specific multiples of 64 link at 1/480th of
rate
primary data rate
kbps only
Terrestrial is T1 or E1
One BW alarm
1/45 of front panel data
Same as EDMAC, plus
rate
Any multiple of 64 kbps, EIA-232 Earth station
Terrestrial is
up to n = 31
link at 1/576th of
T1 or E1
primary data rate
Variable: between
EIA-232 Earth station
11.76% at 64 kbps to
All rates and formats
link at variable rate,
1.58% above 7 Mbps
plus AUPC
n x 64 kbps, up to
0.78% (129/128) of
n = 128 using a max. of
None
front panel data rate
4 balanced G.703 E1
D&I interfaces
n x 64 kbps, up to
Concatenation of QDI n = 128 using a max. of
None
and EDMAC-2
4 balanced G.703 E1
D&I interfaces
Additional ReedSolomon Overhead
200/220
225/205
219/201
126/112
Scrambling
(see Note 1)
200/180
Proprietary scrambler
200/180
Proprietary scrambler
200/180
Proprietary scrambler
T1 = 225/205
E1 = 219/201 and
IESS-310 mode
T2/E2 = 194/178
Basic ITU V.35
(Intelsat)
126/112
219/201 for IESS-310
mode
IESS-309 scrambler
126/112
219/201 for IESS-310
mode
IESS-309 scrambler
126/112
Basic ITU V.35
(Intelsat)
126/112
Basic ITU V.35
(Intelsat)
220/200
225/205
219/201
Basic ITU V.35
(Intelsat)
200/180
Basic ITU V.35
(Intelsat)
Notes:
1.
Reed-Solomon is Off.
2.
% for Rates 5/16 or 21/44 BPSK Turbo, Rate 1/2 QPSK/OQPSK Turbo, and all rates > 2 Mbps.
1–21
Basic ITU
V.35 (Intelsat)
CDM-625 Advanced Satellite Modem
Introduction
1.4.7
Revision 15
MN-CDM625
Data Rate Ranges
UNFRAMED (NO REED SOLOMON)
No FEC, BPSK
No FEC, O/QPSK
VITERBI, BPSK, 1/2
VITERBI, O/QPSK, 1/2
VITERBI, O/QPSK, 3/4
VITERBI, O/QPSK, 7/8
SEQUENTIAL, BPSK, 1/2
SEQUENTIAL, O/QPSK, 1/2
SEQUENTIAL, O/QPSK, 3/4
SEQUENTIAL, O/QPSK, 7/8
TRELLIS, 8PSK, 2/3
TPC, BPSK, 5/16
TPC, BPSK, 21/44 (aka 1/2)
TPC, O/QPSK, 21/44 (aka 1/2)
TPC, O/QPSK, 3/4
TPC, O/QPSK, 17/18 (aka 0.95)
TPC, O/QPSK, 7/8
TPC, 8PSK/8-QAM, 3/4
TPC, 8PSK/8-QAM, 17/18 (aka 0.95)
TPC, 8PSK/8-QAM, 7/8
TPC, 16-QAM, 3/4
TPC, 16-QAM, 7/8
LDPC, BPSK, 1/2
LDPC, O/QPSK, 1/2
LDPC, O/QPSK, 3/4
LDPC, O/QPSK, 2/3
LDPC, 8PSK/8-QAM, 3/4
LDPC, 8PSK/8-QAM, 2/3
LDPC, 16-QAM, 3/4
Lower Limit (kbps)
18.0
36.0
18.0
18.0
27.0
31.5
18.0
18.0
27.0
31.5
36.0
18.0
18.0
18.0
27.0
34.2
31.5
40.5
52.0
48.0
54.0
63.0
18.0
18.0
27.0
24.0
40.5
36.0
54.0
Upper Limit (kbps)
12500
25000.0
6250.0
12500.0
18750.0
21875.0
1024.0
2048.0
2048.0
2048.0
25000.0
3906.2
5965.9
11931.8
18750.0
23611.1
21875.0
25000.0
25000.0
25000.0
25000.0
25000.0
6250.0
12500.0
18750.0
16666.6
25000.0
25000.0
25000.0
UNFRAMED (ANY REED SOLOMON)
VITERBI, BPSK, 1/2
VITERBI, O/QPSK, 1/2
VITERBI, O/QPSK, 3/4
VITERBI, O/QPSK, 7/8
SEQUENTIAL, BPSK, 1/2
SEQUENTIAL, O/QPSK, 1/2
SEQUENTIAL, O/QPSK, 3/4
SEQUENTIAL, O/QPSK, 7/8
TRELLIS, 8PSK, 2/3
VIT 16-QAM, 3/4
VIT 16-QAM, 7/8
Lower Limit (kbps)
18.0
18.0
27.0
31.5
18.0
18.0
29.0
31.5
36.0
54.0
63.0
Upper Limit (kbps)
5555.0
11111.0
16666.6
19444.0
1024.0
2048.0
2048.0
2048.0
22222.0
22222.0
22222.0
1–22
CDM-625 Advanced Satellite Modem
Introduction
Revision 15
MN-CDM625
EDMAC, EDMAC-2, or EDMAC-3 (NO REED SOLOMON)
No FEC, BPSK
No FEC, O/QPSK
VITERBI, BPSK, 1/2
VITERBI, O/QPSK, 1/2
VITERBI, O/QPSK, 3/4
VITERBI, O/QPSK, 7/8
SEQUENTIAL, BPSK, 1/2
SEQUENTIAL, O/QPSK, 1/2
SEQUENTIAL, O/QPSK, 3/4
SEQUENTIAL, O/QPSK, 7/8
TRELLIS, 8PSK, 2/3
TPC, BPSK, 5/16
TPC, BPSK, 21/44 (aka 1/2)
TPC, O/QPSK, 21/44 (aka 1/2)
TPC, O/QPSK, 3/4
TPC, O/QPSK, 17/18 (aka 0.95)
TPC, O/QPSK, 7/8
TPC, 8PSK/8-QAM, 3/4
TPC, 8PSK/8-QAM, 17/18 (aka 0.95)
TPC, 8PSK/8-QAM, 7/8
TPC, 16-QAM, 3/4
TPC, 16-QAM, 7/8
LDPC, BPSK, 1/2
LDPC, O/QPSK, 1/2
LDPC, O/QPSK, 3/4
LDPC, O/QPSK, 2/3
LDPC, 8PSK/8-QAM, 3/4
LDPC, 8PSK/8-QAM, 2/3
LDPC, 16-QAM, 3/4
Lower Limit (kbps)
18.0
35.5
18.0
18.0
26.6
31.0
18.0
18.0
26.6
31.0
35.5
18.0
18.0
18.0
26.6
33.5
31.0
39.9
50.2
46.5
53.2
62.0
18.0
18.0
26.6
23.7
39.9
35.5
53.2
Upper Limit (kbps)
12295.0
24590.1
6147.5
12295.0
18442.6
21516.3
1024.0
2048.0
2048.0
2048.0
24590.1
3842.2
5868.1
11736.2
18442.6
23224.0
21516.3
24590.1
24590.1
24590.1
24590.1
24590.1
6147.5
12295.0
18442.6
16393.4
24590.1
24590.1
24590.1
EDMAC, EDMAC-2, or EDMAC-3 (ANY REED SOLOMON)
VITERBI, BPSK, 1/2
VITERBI, O/QPSK, 1/2
VITERBI, O/QPSK, 3/4
VITERBI, O/QPSK, 7/8
SEQUENTIAL, BPSK, 1/2
SEQUENTIAL, O/QPSK, 1/2
SEQUENTIAL, O/QPSK, 3/4
SEQUENTIAL, O/QPSK, 7/8
TRELLIS, 8PSK, 2/3
VIT 16-QAM, 3/4
VIT 16-QAM, 7/8
Lower Limit (kbps)
18.0
18.0
24.0
27.9
18.0
18.0
24.0
27.9
31.9
47.9
55.8
Upper Limit (kbps)
5532.7
11065.5
16598.3
19364.7
1024.0
2048.0
2048.0
2048.0
22131.1
22131.1
22131.1
1–23
CDM-625 Advanced Satellite Modem
Introduction
Revision 15
MN-CDM625
IBS (NO REED SOLOMON)
No FEC, BPSK
No FEC, O/QPSK
VITERBI, BPSK, 1/2
VITERBI, O/QPSK, 1/2
VITERBI, O/QPSK, 3/4
VITERBI, O/QPSK, 7/8
SEQUENTIAL, BPSK, 1/2
SEQUENTIAL, O/QPSK, 1/2
SEQUENTIAL, O/QPSK, 3/4
SEQUENTIAL, O/QPSK, 7/8
TRELLIS, 8PSK, 2/3
TPC, BPSK, 5/16
TPC, BPSK, 21/44 (aka 1/2)
TPC, O/QPSK, 21/44 (aka 1/2)
TPC, O/QPSK, 3/4
TPC, O/QPSK, 17/18 (aka 0.95)
TPC, O/QPSK, 7/8
TPC, 8PSK/8-QAM, 3/4
TPC, 8PSK/8-QAM, 17/18 (aka 0.95)
TPC, 8PSK/8-QAM, 7/8
TPC, 16-QAM, 3/4
TPC, 16-QAM, 7/8
LDPC, BPSK, 1/2
LDPC,O/ QPSK, 1/2
LDPC, O/QPSK, 3/4
LDPC, O/QPSK, 2/3
LDPC, 8PSK/8-QAM, 3/4
LDPC, 8PSK/8-QAM, 2/3
LDPC, 16-QAM, 3/4
Lower Limit (kbps)
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
Upper Limit (kbps)
8448.0
8448.0
5859.3
8448.0
8448.0
8448.0
1024.0
2048.0
2048.0
2048.0
8448.0
3662.1
5593.0
8448.0
8448.0
8448.0
8448.0
8448.0
8448.0
8448.0
8448.0
8448.0
5859.3
8448.0
8448.0
8448.0
8448.0
8448.0
8448.0
IBS (ANY REED SOLOMON)
VITERBI, BPSK, 1/2
VITERBI, O/QPSK, 1/2
VITERBI, O/QPSK, 3/4
VITERBI, O/QPSK, 7/8
SEQUENTIAL, BPSK, 1/2
SEQUENTIAL, O/QPSK, 1/2
SEQUENTIAL, O/QPSK, 3/4
SEQUENTIAL, O/QPSK, 7/8
TRELLIS, 8PSK, 2/3
VIT 16-QAM, 3/4
VIT 16-QAM, 7/8
Lower Limit (kbps)
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
Upper Limit (kbps)
5208.0
8448.0
8448.0
8448.0
1024.0
2048.0
2048.0
2048.0
8448.0
8448.0
8448.0
1–24
CDM-625 Advanced Satellite Modem
Introduction
Revision 15
MN-CDM625
ESC++ (NO REED SOLOMON)
No FEC, BPSK
No FEC, O/QPSK
VITERBI, BPSK, 1/2
VITERBI, O/QPSK, 1/2
VITERBI, O/QPSK, 3/4
VITERBI, O/QPSK, 7/8
SEQUENTIAL, BPSK, 1/2
SEQUENTIAL, O/QPSK, 1/2
SEQUENTIAL, O/QPSK, 3/4
SEQUENTIAL, O/QPSK, 7/8
TRELLIS, 8PSK, 2/3
TPC, BPSK, 5/16
TPC, BPSK, 21/44 (aka 1/2)
TPC, O/QPSK, 21/44 (aka 1/2)
TPC, O/QPSK, 3/4
TPC, O/QPSK, 17/18 (aka 0.95)
TPC, O/QPSK, 7/8
TPC, 8PSK/8-QAM, 3/4
TPC, 8PSK/8-QAM 17/18 (aka 0.95)
TPC, 8PSK/8-QAM, 7/8
TPC, 16-QAM, 3/4
TPC, 16-QAM, 7/8
LDPC, BPSK, 1/2
LDPC, O/QPSK, 1/2
LDPC, O/QPSK, 3/4
LDPC, O/QPSK, 2/3
LDPC, 8PSK/8-QAM, 3/4
LDPC, 8PSK/8-QAM,2/3
LDPC, 16-QAM, 3/4
Lower Limit (kbps)
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
Upper Limit (kbps)
12304.6
24609.3
5921.0
12304.6
18457.0
21533.2
1024.0
2048.0
2048.0
2048.0
24609.3
3700.6
5651.9
11745.3
18457.0
23242.1
21533.2
24609.3
24609.3
24609.3
24609.3
24609.3
5921.0
12304.6
18457.0
16406.2
24609.3
24609.3
24609.3
ESC++ (ANY REED SOLOMON)
VITERBI, BPSK, 1/2
VITERBI, O/QPSK, 1/2
VITERBI, O/QPSK, 3/4
VITERBI, O/QPSK, 7/8
SEQUENTIAL, BPSK, 1/2
SEQUENTIAL, O/QPSK, 1/2
SEQUENTIAL, O/QPSK, 3/4
SEQUENTIAL, O/QPSK, 7/8
TRELLIS, 8PSK, 2/3
VITERBI, 16-QAM, 3/4
VITERBI, 16-QAM, 7/8
Lower Limit (kbps)
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
64.0
Upper Limit (kbps)
5263.1
10937.5
16406.2
19140.6
1024.0
2048.0
2048.0
2048.0
21875.0
21875.0
21875.0
1–25
CDM-625 Advanced Satellite Modem
Introduction
Revision 15
MN-CDM625
VersaFEC (ANY MODE)
VersaFEC BPSK Rate 0.488
VersaFEC QPSK Rate 0.533
VersaFEC QPSK Rate 0.631
VersaFEC QPSK Rate 0.706
VersaFEC QPSK Rate 0.803
VersaFEC 8-QAM Rate 0.576 (ECCM)
VersaFEC 8-QAM Rate 0.642
VersaFEC 8-QAM Rate 0.711
VersaFEC 8-QAM Rate 0.780
VersaFEC 16-QAM Rate 0.644 (ECCM)
VersaFEC 16-QAM Rate 0.731
VersaFEC 16-QAM Rate 0.780
VersaFEC 16-QAM Rate 0.829
VersaFEC 16-QAM Rate 0.853
ULL BPSK Rate 0.493
ULL QPSK Rate 0.493
ULL QPSK Rate 0.654
ULL QPSK Rate 0.734
Lower Limit (kbps)
18.0
20.0
23.0
26.0
28.0
32.0
35.0
39.0
43.0
47.0
53.0
57.0
60.0
62.0
18.0
18.0
24.0
27.0
Upper Limit (kbps)
5700.0
10000.0
10000.0
10000.0
12000.0
11000.0
12000.0
12000.0
12000.0
11000.0
12000.0
14000.0
14000.0
16000.0
5700.0
6000.0
9000.0
9000.0
VersaFEC Adaptive Coding and Modulation (ACM): See Specifications that follow (Sect.1.4.8)
1.4.8
VersaFEC Adaptive Coding and Modulation (ACM)
Symbol Rate Range
Adaptive Coding and Modulation, using BPSK, QPSK, 8-QAM , 16-QAM and
VersaFEC short-block LDPC coding – total of 12 ModCods
37 ksps to 4100 ksps
Interface
10/100 Base T Ethernet, with auto-negotiated Congestion Control
Remote SNR Teporting
Automatically reported from remote modem – built in function at the physical
layer – requires no additional overhead
System Type
Maximum Span of Data Rate 7:1 over range of adaptation
Switch Point (Decreasing
SNR)
Corresponds to SNR (Eb/No) that gives BER=5 x 10-8
Switch Point Hysteresis
0.3 dB
Maximum Fading Rate
Approximately 1 dB/second (higher if Target Eb/No margin >1 dB)
Maximum ModCod Update
Rate
One update every two seconds (no restriction on distance between ModCods)
Configurable Parameters
System Latency
Monitored Parameters
MIN and MAX ModCod (ModCod0 through ModCod11)
Remote Demod Unlock Action: Maintain current ModCod, Go to MIN ModCod
Target Eb/No margin (0-4.5 dB, 0.5 dB steps)
54 ms max. (for a system operating at 100 ksps, and assuming a WAN
buffer of 20 ms, not including satellite path)
Tx and Rx ModCods
Local and Remote SNR
(–3.0 to +22.0dB, 0.1dB resolution, ±0.5 dB accuracy)
Configuration and monitor menus displaying data rate, modulation and code rate update
dynamically with ModCod
1–26
CDM-625 Advanced Satellite Modem
Introduction
Modulation
Code Rate
BPSK
QPSK
QPSK
QPSK
QPSK
8-QAM
8-QAM
8-QAM
16-QAM
16-QAM
16-QAM
16-QAM
0.488
0.533
0.631
0.706
0.803
0.642
0.711
0.780
0.731
0.780
0.829
0.853
1.4.9
Revision 15
MN-CDM625
Spectral
Typical Eb/No, for
Efficiency, bps/Hz
BER=5 x 10-8
0.49
1.07
1.26
1.41
1.61
1.93
2.13
2.34
2.93
3.12
3.32
3.41
2.4 dB
2.2 dB
2.7 dB
3.4 dB
3.8 dB
4.6 dB
5.2 dB
5.6 dB
6.3 dB
7.0 dB
7.5 dB
8.0 dB
Minimum Data
Rate,
ACM Mode
Maximum Data
Rate,
ACM Mode
18.1 kbps
39.6 kbps
46.7 kbps
52.2 kbps
59.6 kbps
71.5 kbps
78.8 kbps
86.6 kbps
108.5 kbps
115.5 kbps
122.8 kbps
126.2 kbps
2.00 Mbps
4.38 Mbps
5.16 Mbps
5.78 Mbps
6.60 Mbps
7.91 Mbps
8.73 Mbps
9.59 Mbps
12.01 Mbps
12.79 Mbps
13.61 Mbps
14.00 Mbps
Miscellaneous
Front Panel
Tactile keypad, 6 keys (up, down, left, right, ENTER, CLEAR)
Vacuum Fluorescent Display (blue) – two lines @ 40 characters/line
Loopbacks
Internal IF loopback, RF loopback, digital loopback, and inward/outward loopback
Fault Relays
Hardware fault, Rx and Tx Traffic Alarms, Open Network Backward Alarms
Type: Form C Contacts. Rating: Up to +/-50V, max. 0.5 Amp
M&C Interface
EIA-232 and EIA-485 (addressable multidrop, 2-wire or 4-wire) or Ethernet (10/100 BaseT)
M&C Software
Serial communications, SNMP, Telnet, Web Server (HTTP)
Firmware update
Via Ethernet port. ftp protocol
Dimensions
1RU high, 17.65 inches (448 mm) deep
Weight
10.5 lbs (4.8 kg) max. (All option cards and 48V BUC supply installed)
AC Consumption
48W (typ. TPC/LDPC Codec and CnC module installed), 68W (max.)
280W (typ. TPC/LDPC Codec, CnC module, 48V BUC supply installed), 300W (max.)
AC Operating Voltage
100-240 VAC nom. – autosensing
90-264 VAC max.
DC Consumption (option) As per AC consumption
DC Operating Voltage
43-60 VDC nom.
36-60 VDC max.
Operating temperature
0-50ºC (32-122ºF)
1.4.10 Approvals
“CE” as follows:
EN 55022 Class B (Emissions)
EN 50082-1 (Immunity)
EN 60950-1 (Safety)
FCC
Federal Communications Commission Federal Code of Regulation FCC Part 15, Subpart B.
1–27
EN 61000-3-2
EN 61000-3-3
EN 61000-4-2
EN 61000-4-4
EN 61000-4-5
EN 61000-4-6
EN 61000-4-8
EN 61000-4-9
EN 61000-4-11
EN 61000-4-13
CDM-625 Advanced Satellite Modem
Introduction
Revision 15
MN-CDM625
Notes:
1–28
Chapter 2. INSTALLATION
2.1
Unpack and Inspect the Shipment
Figure 2-1. Unpack and Inspect the Shipment
The CDM-625 Advanced Satellite Modem, , its optional Installation and Operation Manual
(otherwise available online at http://www.comtechefdata.com), and its power cord were
packaged and shipped in a reusable cardboard carton containing protective foam spacing.
CAUTION – THIS EQUIPMENT CONTAINS PARTS AND ASSEMBLIES SENSITIVE TO
DAMAGE BY ELECTROSTATIC DISCHARGE (ESD). USE ESD PRECAUTIONARY
PROCEDURES WHEN HANDLING THE EQUIPMENT.
2–1
CDM-625 Advanced Satellite Modem
Installation
Revision 15
MN-CDM625
Once opened, inspect the shipment:
Step
2.2
Task
1
Keep all shipping materials.
2
Check the packing list to make sure the shipment is complete.
3
Inspect the equipment for damage. If damage exists, immediately contact the carrier
and Comtech EF Data to submit a damage report.
4
Read the manual.
Install the Unit Into a Rack Enclosure
Mount The unit in its assigned position in the rack enclosure (Figure 2-2):
Use, as required:
•
A standard rack-mounted shelf;
•
User-supplied screws to secure the front panel to the rack enclosure threaded front
mounting rails;
•
Comtech EF Data’s optional KT/6228 (4”) or KT/6228 (10”) Rear-Mounting Support Brackets
Kit (Figure 2-3).
CAUTION – When mounting The unit into a rack enclosure:
•
•
PROPER GROUNDING PROTECTION IS REQUIRED. The equipment must be connected
to the protective earth connection at all times. It is therefore imperative that the unit
is properly grounded, using the ground stud provided on the unit rear panel, during
installation, configuration, and operation.
o
In Finland: "Laite on liitettävä suojamaadoituskoskettimilla varustettuun
pistorasiaan."
o
In Norway: “Apparatet må tilkoples jordet stikkontakt.”
o
In Sweden: “Apparaten skall anslutas till jordat uttag.”
PROPER AIR VENTILATION IS REQUIRED. In a rack system where there is high
heat discharge, provide forced-air cooling with top- or bottom-mounted fans or
blowers.
o
Make sure there is adequate clearance inside the enclosure, especially at the
side for air ventilation.
2–2
CDM-625 Advanced Satellite Modem
Installation
o
Revision 15
MN-CDM625
Air temperature inside the rack enclosure should never exceed 50°C (122°F).
For information about custom rack enclosures, contact Comtech EF Data Product
Support.
•
Feature
The CDM-625 CANNOT have rack slides mounted to the sides of the chassis.
Cooling fans and exhaust vents are provided here – air flow must not be
impeded. Comtech EF Data recommends that an alternate method of support is
provided within the rack, such as standard rack shelves or the optional RearMounting Support Bracket Kit. If there is any doubt, contact Comtech EF Data
Product Support.
Description
1
Custom Rack Enclosure
2
CDM-625 Advanced Satellite Modem
3
Standard Rack Shelving
Rack Enclosure Threaded Front
Mounting Rail (typical)
Unit Front Panel
User-supplied Screws
4
5
6
Figure 2-2. Install the Unit Into a Rack Enclosure
2–3
CDM-625 Advanced Satellite Modem
Installation
Revision 15
MN-CDM625
2.2.1 Install the Optional Rear-Mounting Support Brackets Kits
Detail
1
2
Item
Description
Back of modem
Rack Enclosure Threaded Rear Mounting Rail (typical)
Kit / Quantity
CEFD P/N
Description
2
HW/10-32SHLDR
Shoulder Screw, #10
4
HW/10-32FLT
Flat Washer, #10
2
2
HW/10-32SPLIT
Lock Washer, #10
4
2
2
HW/10-32HEXNUT
Hex Nut, #10
5
4
4
HW/10-32x1/2RK
Bolt, #10, Rear Support Bracket
KT/6228-2
KT/6228-3
1
2
2
4
3
6
2
–
FP/6138-2
Bracket, Rear Support – 4”
–
2
FP/6138-3
Bracket, Rear Support – 10”
Figure 2-3. Install the Optional Rear-Mounting Support Brackets Kit
Tools needed to install the optional KT/6228 (4”) or KT/6228 (10”) Rear-Mounting Support
Brackets Kit:
•
A medium Phillips screwdriver
•
A 5/32-inch SAE Allen Wrench
•
An adjustable Crescent wrench.
2–4
CDM-625 Advanced Satellite Modem
Installation
Revision 15
MN-CDM625
Follow these steps to install the optional KT/6228 (4”) or KT/6228 (10”) Rear-Mounting Support
Brackets Kit:
Step
2.3
Task
1
Use the #10 flat washers, #10 split washers, and #10 hex nut to secure the #10 shoulder screws to the unit
chassis through the rear right and left side mounting slots as shown.
2
Use the #10 rack bracket bolts to install the rear support brackets onto the rack enclosure threaded rear
mounting rails.
3
Mount the unit into the rack enclosure. Ensure that the shoulders of the #10 shoulder screws properly engage
into the rear support bracket slots.
Configure the CDM-625
Chapter 5. FRONT PANEL OPERATION
The unit is shipped with a default 64 kbps, QPSK, Rate 1/2 configuration. There are no internal
jumpers to configure, no interface cards to install, and no other options to install. Conifugration is
carried out entirely via the modem’s installed firmware – use the front panel keypad and display to
configure the modem locally.
The auto-sensing AC power supply does not require any adjustments. Simply plug in
the supplied line cord, and turn on the rear panel switch.
2.4
Verify Modem Operation
Chapter 5. FRONT PANEL OPERATION – Sect. 5.2.2 SELECT: Test Menus
You may use the modem’s test functions to quickly verify proper operation of the modem,
without the need for externally connected equipment. Use the front panel keypad and, from the
top level menu, select TEST: Mode → IF↓ (IF LOOP).The demod should synchronize, and the Rx
TRAFFIC LED should illuminate GREEN. If the unit does not pass this test, contact Comtech EF
Data Product Support for further assistance.
2.5
Connect the External Cables
Chapter 3. REAR PANEL CONNECTORS AND PINOUTS
Once you verify correct operation via the Internal IF Loop test, use the front panel keypad to
finalize your configuration as needed. Connect all external cables. If difficulties occur, contact
Comtech EF Data Product Support for further assistance.
2–5
CDM-625 Advanced Satellite Modem
Installation
Revision 15
MN-CDM625
Notes:
2–6
Chapter 3. REAR PANEL
CONNECTORS A ND PINOUTS
3.1
CDM-625 Rear Panel Overview
Figure 3-1. CDM-625 Rear Panel View
(Top) Standard AC Chassis (CEFD P/N PL/12587-1)
(Bottom) Optional 48V DC Chassis (CEFD P/N PL/12587-2)
The CDM-625 Advanced Satellite Modem’s rear panel, shown in Figure 3-1, provides all
necessary external connections between the modem and other equipment:
•
Section 3.2 details the cabling connections provided on the rear panel interface, grouped
according to service function. Where applicable, the connector’s pinout table is provided.
•
Section 3.3 details the unit’s grounding and power features.
3–1
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
3.2
Revision 15
MN-CDM625
CDM-625 Cable Connections
Table 3-1. CDM-625 Rear Panel Cabling Connections
Connector
Group (Sect)
Name
IF
Sect. 3.2.1
Rx
Connector Type
BNC female (70/140MHz band)
Type ’N’ female (L-Band)
BNC female (70/140MHz band)
Tx
Terrestrial Data
Sect. 3.2.2
Data Interface
IF Input
IF Output
25-pin Type ‘D’ female
Serial synchronous data input/output
Balanced G.703
9-pin Type ‘D’ female
G.703, D&I or D&I++;
Quad E1 Ports 1 & 2
Auxiliary G.703
9-pin Type ‘D’ female
Quad E1 Ports 3 & 4
Unbalanced Out
BNC female
Receive G.703 (IDO); ASI
Unbalanced In
BNC female
Transmit G.703 (DDI);ASI
IDI
BNC female
Insert Data In / Sub-rate Auxiliary Tx
G.703 In
DDO
BNC female
Drop Data Output / Sub-rate Auxiliary Rx
G.703 Out
10/100 Ethernet
(4X) RJ-45 female
10/100 Base-T management and data
IDR Data/Alarms/Audio
44-pin High Density Type ‘D’
female
Intelsat Open Network auxiliary signals
ESC
9-pin Type ‘D’ female
ESC Input/output (RS232/485)
Remote Control
9-pin Type ‘D’ male
Serial Remote Interface (RS232/485)
Alarms
15-pin Type ‘D’ male
Form C Alarms (relay closures)
PMSI
9-pin Type ‘D’ female
Pre-Mapped Symbol Interface (CnC)
1:1 Control
9-pin Type ‘D’ female
Connection to External 1:1 Controller
External Reference
BNC female
Input/output
G.703
Data
Utility
Sect. 3.2.3
Type ’N’ female (L-Band)
Function
The European EMC Directive 2004/108/EEC (EN 55022, EN 50024) requires using properly
shielded cables for DATA I/O. These cables must be double-shielded from end-to-end,
ensuring a continuous ground shield.
3–2
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
3.2.1
Revision 15
MN-CDM625
IF Connection Group
WARNING! THERE MAY BE DC VOLTAGES PRESENT ON THE TYPE ‘N’ RX AND TX IF
CONNECTORS, UP TO A MAXIMUM OF 48 VOLTS.
3.2.1.1
3.2.1.2
Rx IF Connectors
Connector Type
Description
Type ‘N’
Rx IF signal, L- band
BNC
Rx IF signal, 70/140 MHz band
Direction
In
Tx IF Connectors
Connector Type
Description
Type ‘N’
Tx IF signal, L- band
BNC
Tx IF signal, 70/140 MHz band
3–3
Direction
Out
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
3.2.2
3.2.2.1
Revision 15
MN-CDM625
Terrestrial Data Connection Group
Data Interface (DB-25F)
The Data Interface connector is a 25-pin, Type ‘D’ female interface that
conducts data input and output signals to and from the modem, and
connects to customer’s terrestrial equipment, breakout panel, or
protection switch.
Table 3-2. Data Interface Connector Pinouts
Pin #
(R-L)
1
14
2
15
3
16
4
17
5
Generic Signal Description
Direction
EIA-422
EIA 530
V.35
HSSI
LVDS
Circuit
#
Shield
–
Shield
FG
Shield
Shield
101
Transmit Data B
DTE to Modem
SD B
SD B
SD B
SD B
103
Transmit Data A
DTE to Modem
SD A
SD A
SD A
SD A
103
Internal Transmit Clock A
Modem to DTE
ST A
SCT A
ST A
ST A
114
Receive Data A
Modem to DTE
RD A
RD A
RD A
RD A
104
Receive Data B
Modem to DTE
RD B
RD B
RD B
RD B
104
Request to Send A *
DTE to Modem
RS A
RTS
TA A
–
105
Receive Clock A
Modem to DTE
RT A
SCR A
RT A
RT A
115
Clear to Send A *
Modem to DTE
CS A
CTS
–
–
106
18
(NOTE 2)
6
19
7
Data Set Ready A (NOTE 2)
Modem to DTE
DM A
DSR
–
–
–
Request to Send B *
DTE to Modem
RS B
-
TA B
–
105
Signal Ground
–
SG
SG
SG
SG
102
RLSD
CA A
RR A
109
20
(NOTE 2)
8
Receiver Ready A
Modem to DTE
9
Receive Clock B
Modem to DTE
RT B
SCR B
RT B
RT B
115
Data Set Ready B (NOTE 2)
Modem to DTE
DM B
–
–
–
–
Receiver Ready B
Modem to DTE
RR B
–
CA B
RR B
109
21
RR A
(NOTE 2)
22
10
23
(NOTE 2)
11
24
12
Transmit Clock B
DTE to Modem
TT B
SCTE B
TT B
TT B
113
Transmit Clock A
DTE to Modem
TT A
SCTE A
TT A
TT A
113
Internal Transmit Clock B
Modem to DTE
ST B
SCT B
ST B
ST B
114
–
–
–
106
25
(NOTE 2)
13
Clear to Send B *
Modem to DTE
CS B
Notes:
1.
When the rear-panel LED marked “1:N Active!” is OFF, all of the signals shown above are available and functional. In
addition, pins not shown are not connected, and therefore no damage will occur if other signals are connected to the
additional pins.
3–4
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
Revision 15
MN-CDM625
2.
When the rear-panel LED marked “1:N Active!” is ON, the signals shown highlighted are no longer available. Furthermore,
pins 6, 18, 20, 21, 22, 23 and 25 are reserved for use by the 1:N system. DO NOT connect signals to any of these pins in
this mode. Certain pins have DC voltages present that may damage equipment other than a Comtech EF Data redundancy
switch.
3.
For X.21 operation, use the EIA-422 pins, but ignore Receive Clock if the Modem is DTE, and ignore Transmit clocks if the
Modem is DCE.
4.
For IDR operation using G.703, this primary interface becomes the 8 kbps EIA-422 overhead channel.
3.2.2.1.1
HSSI Operation via the CIC-60 Interface Adapter Module
For HSSI operation (Tx, Rx, or both), the optional CIC-60 Interface Adapter Module (Figure 3-2)
may be purchased from Comtech EF Data to adapt the Data Interface 25-pin Type ‘D’ female
connection to a standard 50-pin Type ‘HD’ HSSI (SCSI-II) female connection.
See Table 3-3 for the pinouts for the HSSI/EIA-613 side of the CIC-60 Adapter Module.
The modem must first be configured for the appropriate HSSI operation, via the
CDM-625 Front Panel, before using this adapter:
SELECT: Configure  Mode 
(Select HSSI for both Tx Mode / Interface and Rx Mode / Interface)
Chapter 5. FRONT PANEL OPERATION
CIC-60 Interface Adapter Module
(Modem Interface Side)
CIC-60 Interface Adapter Module
(Installed, HSSI Interface Side Shown)
Figure 3-2. CIC-60 Interface Adapter Module (CEFD P/N PL-0000307)
3–5
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
Revision 15
MN-CDM625
Table 3-3. CIC-60 Module – HSSI/EIA-613 Side Connector Pinouts
Pin #
(+,-)
Signal Function
1, 26
Circuit
Direction
HSSI Signal
EIA-613 Circuit
Comment
Signal Ground
SG
102
2, 27
Receive Timing
RT
115
From DCE
3, 28
DCE Available
CA
107
From DCE
4, 29
Receive Data
RD
104
From DCE
5, 30
Loopback circuit C
LC
undefined
From DCE
6, 31
Send Timing
ST
114
From DCE
7, 32
Signal Ground
SG
102
8, 33
DTE Available
TA
108/2
to DCE
9, 34
Terminal Timing
TT
113
to DCE
10, 35
Loopback circuit A
LA
143
to DCE
11, 36
Send Data
SD
103
to DCE
12, 37
Loopback Circuit B
LB
144
to DCE
13, 38
Signal Ground
SG
102
Ground
14, 39
Not used
undefined
Not used
15, 40
TX DVALID
undefined
Not used
Ground
Not used
Ground
Not used
Not used
16, 41
Reserved (to DCE)
Not used
17, 42
Reserved (to DCE)
Not used
18, 43
Reserved (to DCE)
Not used
19, 44
Signal Ground
102
Ground
20
undefined
Not used
45
undefined
Not used
21
undefined
Not used
46
SG
Reserved (to DTE)
Not used
22, 47
undefined
from DCE
Not used
23, 48
undefined
from DCE
Not used
from DCE
Not used
24, 49
Test Mode
TM
142
25, 50
Signal Ground
SG
102
3–6
Ground
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
3.2.2.2
3.2.2.2.1
Revision 15
MN-CDM625
G.703 Connectors
Balanced G.703 (DB-9F)
The Balanced G.703 connector is a 9-pin Type ‘D’ female connector. It is
used for single port G.703, D&I or D&I++. When used with Quad E1
operations, this connector serves Ports 1 and 2 of the Quad E1 interface.
Table 3-4. Balanced G.703 Connector Pinouts
Pin #
(R-L)
1
6
2
7
3
8
4
9
5
3.2.2.2.2
Signal Function
Serial G.703
Rx out Rx out +
GND
Tx in +
Signal Function
D&I or D&I++
IDO IDO +
IDI IDI +
GND
DDO +
DDO DDI DDI +
Signal Function
Quad D&I
Port 2 Rx Out Port 2 Rx Out +
Port 2 Tx In Port 2 Tx In +
GND
Port 1 Rx Out +
Port 1 Rx Out Port 1 Tx In Port 1 Tx In +
Aux G.703 (DB-9F)
The Auxiliary G.703 connector is a 9-pin Type ‘D’ female connector. When
used with Quad E1 operations, this connector serves Ports 3 and 4 of the
Quad E1 interface.
Table 3-5. Auxiliary G.703 Connector Pinouts
Pin #
(R-L)
1
6
2
7
3
8
4
9
5
Signal Function
Serial G.703
–
–
–
–
–
–
–
–
–
Signal Function
D&I or D&I++
–
–
–
–
–
–
–
–
–
3–7
Signal Function
Quad D&I
Port 4 Rx out Port 4 Rx out +
Port 4 Tx in Port 4 Tx in +
GND
Port 3 Rx out Port 3 Rx out +
Port 3 Tx in Port 3 Tx in +
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
Revision 15
MN-CDM625
3.2.2.2.3 Quad E1 Operation via the Balanced G.703 / Aux G.703
Connectors
Each adapter cable option provides for two of the four ports of the Quad E1
interface. If all four ports of Quad E1 are needed, the user will need to obtain a
quantity of (2X) of any adapter option.
For Quad E1 operation, optional Comtech EF Data cabling accessories may be purchased from
Comtech EF Data to adapt the Balanced G.703 or Auxiliary G.703 connectors as follows:
Figure
3-3
3-4
3-5
CEFD Part No.
CA-0000163
CA-0000164
KT-0000122 or
KT-0020570
Converts (1) 9-pin Type ‘D’ Connector (DB-9F) to:
(2) DB-15F connections – see Table 3-6 for the connector pinout
(2) RJ-48 F connections – see Table 3-7 for the connector pinout
(2) BNC 75Ω BNC-F connections – see Table 3-8 for the connector pinout
3.2.2.2.3.1 CA-0000163 Adapter Cable
Figure 3-3. CA-0000163 Adapter Cable (DB-9M  (2X) DB-15F)
Table 3-6. CA-0000163 Connector Pinouts
Connector
P1
J1
5
9
4
8
7
2
6
1
3
9
1
11
3
2
J2
Twisted
Pair
X
X
9
1
11
3
2
X
X
–
3–8
Signal Function
Port 1 or 3 Tx In +
Port 1 or 3 Tx In Port 1 or 3 Rx In +
Port 1 or 3 Rx In Port 2 or 4 Tx In +
Port 2 of 4 Tx In Port 2 or 4 Rx In +
Port 2 or 4 Rx In GND
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
Revision 15
MN-CDM625
3.2.2.2.3.2 CA-0000164 Adapter Cable
Figure 3-4. CA-0000164 Adapter Cable (DB-9M  (2X) RJ-48F)
Table 3-7. CA-0000164 Connector Pinouts
Connector
P1
J1
J2
5
9
4
8
7
2
6
1
3
1
2
4
5
–
–
–
–
3
–
–
–
–
1
2
4
5
3
Twisted
Pair
X
X
X
X
–
3–9
Signal Function
Port 1 or 3 Tx In +
Port 1 or 3 Tx In Port 1 or 3 Rx In +
Port 1 or 3 Rx In Port 2 or 4 Tx In +
Port 2 of 4 Tx In Port 2 or 4 Rx In +
Port 2 or 4 Rx In GND
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
Revision 15
MN-CDM625
3.2.2.2.3.3 KT-0000122/KT-0020570 Quad E1 Balanced/Unbalanced Adapter
Cable Kits
Quad E1 Balanced/Unbalanced Adapter Kits
Kit / Quantity
Part Number
KT-0000122
KT-0020570
1
–
CA-0000347
–
1
CA-0020710
2
2
502-0532-001
Description
Y-Cable Assembly, 6”, DB-9M  2X RJ-48 Male
(See Table 3-8)
Y-Cable Assembly, 3’, DB-9M  2X RJ-48 Male
(See Table 3-8)
Bolun Adapter, 2X RJ-48 Female  2X BNC 75Ω
Female
Figure 3-5. Quad E1 Balanced/Unbalanced Adapter Cable Kits
Table 3-8. CA-0000347/CA-0020710 Connector Pinouts
P1 PINOUT
Connector
P1
J1
J2
5
9
4
8
7
2
6
1
3
1
2
4
5
–
–
–
–
3
–
–
–
–
1
2
4
5
3
Twisted
Pair
X
X
X
X
–
J1/ J2 TYPICAL WIRE CHART
Signal Function
PIN
WIRE COLOR
Port 1 or 3 Tx In +
Port 1 or 3 Tx In Port 1 or 3 Rx In +
Port 1 or 3 Rx In Port 2 or 4 Tx In +
Port 2 of 4 Tx In Port 2 or 4 Rx In +
Port 2 or 4 Rx In GND
1
2
3
4
5
6
7
8
WHITE / ORANGE STRIPE
ORANGE
WHITE / GREEN STRIPE
BLUE
WHITE / BLUE STRIPE
GREEN
WHITE / BROWN STRIPE
BROWN
3–10
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
3.2.2.2.4
Revision 15
MN-CDM625
Unbal G.703 / ASI – Out (IDO), In (DDI)
Connector Type
BNC
3.2.2.2.5
BNC
\
3.2.2.4
Direction
G.703 Unbalanced Rx (IDO) / ASI
Out
G.703 Unbalanced Tx (DDI) / ASI
In
G.703 IDI (Insert Data In), DDO (Drop Data Out)
Connector Type
3.2.2.3
Description
Description
Direction
IDI (Insert Data Input)
In
DDO (Drop Data Output)
Out
Quad 10/100 Ethernet (RJ-45)
These are four standard RJ-45 female connectors, operating at 10/100 Mbps, half
and full duplex, auto-negotiating.
IDR Data / Alarms / Audio (HD-44F)
The IDR Data/Alarms/Audio interface is a 44-pin, high-density Type ‘D’
female connector.
Table 3-9. IDR Data/Alarms/Audio Connector Pinouts
Top
Pin #
(R-L)
Description
Center
Pin #
(R-L)
Description
Bottom
Pin #
(R-L)
Description
1
BWA4 out Normally Closed
16
No Connect
31
BWA4 out Normally Open
2
BWA3 out Normally Closed
17
BWA4 out Common
32
BWA3 out Normally Open
3
BWA2 out Normally Closed
18
BWA3 out Common
33
BWA2 out Normally Open
4
BWA1 out Normally Closed
19
BWA2 out Common
34
BWA1 out Normally Open
5
No Connect
20
BWA1 out Common
35
TBD RS-422 A in
6
RS-422 Tx ESC Data A in
21
TBD RS-422 B in
36
RS-422 Tx ESC Data B in
7
RS-422 Tx Octet B out
22
RS-422 Tx Octet A out
37
8
BWA3 in
23
BWA4 in
38
BWA2 in
9
Audio Out 2-
24
BWA1 in
39
Audio Out 2+
10
Audio In 2+
25
Audio In 2-
40
Audio Out 1-
11
Audio In 1-
26
Audio Out 1+
41
Audio In 1+
12
RS-422 Tx ESC Clock A out
27
RS-422 Tx ESC Clock B out
42
TBD RS-422 A out
13
RS-422 Rx Octet A out
28
TBD RS-422 B out
43
RS-422 Rx Octet B out
14
RS-422 Rx ESC Clock B out
29
RS-422 Rx ESC Clock A out
44
RS-422 Rx ESC Data A out
15
Ground
30
RS-422 Rx ESC Data B out
3–11
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
3.2.2.5
Revision 15
MN-CDM625
ESC (DB-9F)
The ESC (Engineering Service Channel) port is a 9-pin Type ‘D’ female
connector.
Table 3-10. ESC Connector Pinouts
Pin #
(R-L)
1
6
2
7
3
8
4
9
5
3.2.3
3.2.3.1
Asynchronous
Synchronous
Ground
RS-485 Tx Data B in
RS-232 Rx Data out
RS-485 Tx Data A in
RS-232 Tx Data in
RS-485 Rx Data B out
–
RS-485 Rx Data A out
–
Ground
–
RS-232 Rx Data out
–
RS-232 Tx Data in
–
RS-232 Rx Clock out
–
RS-232 Tx Clock out
Utility Connections Group
Remote Control (DB-9M)
The Remote Control interface is a 9-pin Type ‘D’ male connector. It is
intended for connection to an M&C computer or terminal device, and is user
selectable for either EIA-232 or EIA-485.
Table 3-11. Remote Control Connector Pinouts
Pin #
(L-R)
1
6
2
7
3
8
4
9
5
Description
Direction
Ground
EIA-485 Receive Data ‘B’ *
EIA-232 Transmit Data
EIA-485 Receive Data ‘A’ *
EIA-232 Receive Data
EIA-485 Transmit Data ‘B’ *
Reserved – Do Not Use
EIA-485 Transmit Data ‘A’ *
Ground
–
In
Out
In
In
Out
–
Out
–
*Use for EIA-485 2-wire operation
3–12
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
3.2.3.2
Revision 15
MN-CDM625
Alarms (DB-15M)
Unit alarms are provided on this 15-pin Type ‘D’ male connector.
Table 3-12. Alarm Interface Connector Pinouts
Pin #
(L-R)
1
9
2
10
3
11
4
12
5
13
6
14
7
15
8
3.2.3.3
Name
Signal Function
GND
EXT-OFF
AGC
N/A
RX-Q
RX-I
UNIT-COM
UNIT-NO
UNIT-NC
TX-COM
TX-NO
TX-NC
RX-COM
RX-NO
RX-NC
Ground
EXT Carrier OFF
AGC Voltage (Rx signal level, 0 to 10 Volts)
Spare (No connection)
Rx Q Channel (Constellation Monitor)
RX I Channel (Constellation Monitor)
Unit Fault
Unit Fault (Energized, No Fault)
Unit Fault (De-energized, No Fault)
Tx Traffic
Tx Traffic (Energized, No Fault)
Tx Traffic (De-energized, No Fault)
Rx Traffic
Rx Traffic (Energized, No Fault)
Rx Traffic (De-energized, No Fault)
PMSI Connector, DB-9F
The PMSI (Pre-Mapped Symbol interface) is a 9-pin Type ‘D’ female
connector. The PMSI is an EIA-485 multidrop bus system, used in tandem
with Carrier-in-Carrier (CnC), where one device transmits, and all other
devices on the multidrop bus are configured to receive.
Table 3-13. PMSI (Pre-Mapped Symbol Interface) Connector Pinouts
Pin #
(R-L)
1
6
2
7
3
8
4
9
5
Description
Direction
Ground
Spare (No connection)
Spare (No connection)
PMSI symbol clock – RS485 PMSI symbol clock – RS485 +
PMSI LSB – RS485 PMSI LSB – RS485 +
PMSI MSB – RS485 PMSI MSB – RS485 +
3–13
–
–
–
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
3.2.3.4
Revision 15
MN-CDM625
1:1 Control (DB-9F)
The 1:1 Control connector is intended only for connection to a CRS-170A or CRS-180
Redundancy Switch.
The 1:1 Control connector is a 9-pin Type ‘D’ female connector.
Table 3-14. 1:1 Control Interface Connector Pinouts
Pin #
(R-L)
1
6
2
7
3
8
4
9
5
3.2.3.5
Description
Direction
Ground
Transmit Serial Data – auxiliary channel
Receive Serial Data – auxiliary channel
Redundancy Out 1
Redundancy In 1
Redundancy Out 2
Redundancy In 2
Fused +12 volt Out
Ground
–
Out
In
Out
In
Out
In
Out
–
Ext Ref In/Out
Connector Type
Description
Direction
BNC
External Reference
In/Out
3–14
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
3.3
3.3.1
Revision 15
MN-CDM625
CDM-625 Ground and Power Connections
Chassis Ground Interface
CAUTION – PROPER GROUNDING PROTECTION IS REQUIRED. The equipment must be
connected to the protective earth connection at all times. It is therefore imperative that
the unit is properly grounded, using the ground stud provided on the unit rear panel,
during installation, configuration, and operation.
Figure 3-6. CDM-625 Chassis Ground Interface
(T op) S tandard AC C has s is (C E F D P /N P L /12587-1)
(B ottom) Optional 48V DC C has s is (C E F D P /N P L /12587-2)
Use the #10-32 stud, located adjacent to the power interface, for connecting a
common chassis ground among equipment.
The AC power interface provides the safety ground.
3–15
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
3.3.2
Revision 15
MN-CDM625
Standard 100V/240V Alternating Current (AC) Power Interface
Feature
Description
1
On / Off Switch
2
Press-fit Fuse Holder
3
IEC-60320 Type C14 Three-prong Connector
AC Power Specifications
Input Power
48 watts (typical with TPC/LDPC Codec and
CnC module installed), 68 watts (max)
280 watts (typical TPC/LDPC Codec, CnC
module and 48 volt BUC supply installed),
300 watts (max)
Input Voltage
100V to 240V AC, +6%/-10%, autosensing
(total absolute max. range is 90V to 264V
AC)
Connection Type
IEC-60320 Type C13/C14
Fuse Protection
Line and neutral fusing
(2X) 5mm x 20mm Slow-blow type fuses:
T4A ( 250V AC operation)
Figure 3-7. CDM-625 Standard AC Chassis (CEFD P/N PL/12587-1)
3.3.2.1
AC Operation – CDM-625 Accessories
Contact Comtech EF Data Product Support to purchase any of these available accessories:
CEFD P/N
KT-0020703
Description
AC to 24V DC Conversion Kit
KT-0000226
KT-0000283
KT-0020701
PS-0000075
PS-0000065
CA/17725
AC to 48V DC Conversion Kit
AC Primary Power Supply: 100-240 VAC (65W Power Supply) w/required cables
AC Primary Power Supply: 100-240 VAC (175W Power Supply) w/required cables
AC 65W Power Supply
AC 175W Power Supply
AC Power Cord, Standard (IEC-60320 Type C13) – USA
CA/90025-5FT
KT/11633-1
CA/17850
PP-0000097
PP-0020556
AC Power Jumper Cord, Standard (IEC-60320 Type C13)
AC Power Cord Retainer Kit (for any AC Cord)
AC Power Cord – European / French
AC Power Cord – Japanese
AC Power Cord – India
3–16
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
3.3.2.2
Revision 15
MN-CDM625
AC Operation – Apply Power
Figure 3-8. Apply AC Power to the CDM-625
To apply AC power to the CDM-625 (Figure 3-8):
•
First, plug the provided AC power cord female end into the unit.
•
Then, plug the AC power cord male end into the user-supplied power source.
•
Finally, switch the unit ON.
3.3.2.3
AC Operation – Replace the Fuses
For AC operation, the unit uses two common 5mm x 20mm Slow-blow fuses – one each for line
and neutral connections. The fuses are contained within a fuse holder that is press-fit into the
body of the IEC power module (located on the rear panel, Figure 3-9).
Figure 3-9. Replace the CDM-625 AC Fuses
To replace the fuse(s):
WARNING! DISCONNECT THE POWER SUPPLY BEFORE PROCEEDING!
•
First, unseat the fuse holder from the IEC power module:
3–17
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
•
Revision 15
MN-CDM625
o
Use the slot to pry the holder outward from the IEC power module.
o
Pull the holder straight out, and then swing the holder away from the module.
Then, remove and replace the T4A (4 Amp) fuses as needed.
CAUTION – FOR CONTINUED OPERATOR SAFETY, ALWAYS REPLACE THE FUSES
WITH THE CORRECT TYPE AND RATING.
•
3.3.3
Finally, reseat the fuse holder in the IEC power module.
Optional 48V Direct Current (DC) Power Interface
This DC input design supersedes the configuration featured on modems built prior
to May 2009.
Feature
Description
1
On / Off Switch
2
Power Terminal Block
3
Screw-in Fuse Holders / Receptacles
DC Power Specifications
Input Power
48 watts (typical with TPC/LDPC Codec and CnC
module installed), 68 watts (max)
280 watts (typical TPC/LDPC Codec, CnC module
and 48 volt BUC supply installed), 300 watts (max)
Input Voltage
43 – 60 VDC Nominal
36 – 60 VDC Maximum
Connector Type
Terminal Block
Fuse Protection
(2X) 5mm x 20mm Slow-blow type fuses:
Modem Fuse: 3Amp/250Volts
BUC Fuse: 6.3 Amp/250 Volts
Figure 3-10. CDM-625 Optional DC Chassis (CEFD P/N PL/12587-2)
3–18
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
3.3.3.1
Revision 15
MN-CDM625
Optional DC Operation – CDM-625 Accessories
Contact Comtech EF Data Product Support to purchase any of these available accessories:
3.3.3.2
CEFD P/N
KT-0020683
KT-0020680
KT-0000282
Description
DC to AC Conversion Kit for CDM-625 Base Modem
DC to AC Conversion Kit for CDM-625 with IP Packet Processor
DC Primary Power Supply: -48 VDC, w/required cables
PS-0000066
PS-0020545
CA-0000455
KT/9640-3
KT-0000029
KT-0000185
DC 48V 125W Power Supply
DC 24V 120W Power Supply
DC Pigtail Adapter
BUC Power Supply: 24 VDC 90W (50° C) (100-240 VAC Input)
BUC Power Supply: 48 VDC 150W (50° C) (100-240 VAC Input)
BUC Power Supply: 24 VDC 90W (50° C) (-48 VDC Input)
KT-0000186
BUC Power Supply: 48 VDC 150W (50° C) (-48 VDC Input)
Optional DC Operation – Apply Power
Figure 3-11. Apply Power to the CDM-625 Optional DC Chassis
To apply DC power to the CDM-625:
•
First, connect the user-supplied (+) and (–) DC power leads to their respective terminals.
Number 18 AWG minimum wires are recommended.
•
Then, connect the user-supplied DC power leads to the power source.
•
Finally, switch the unit ON.
3–19
CDM-625 Advanced Satellite Modem
Rear Panel Connectors and Pinouts
3.3.3.3
Revision 15
MN-CDM625
Optional DC Operation – Replace the Fuses
For DC operation,the unit requires two different fuses that are contained within the individual
screw-in receptacles below the terminal block (located on the rear panel, Figure 3-12).
Figure 3-12. Replace the CDM-625 Optional DC Chassis Fuses
To replace the fuses:
WARNING! DISCONNECT THE POWER SUPPLY BEFORE PROCEEDING!
•
First, unscrew either fuse holder from its receptacle. Then, remove and replace the modem
and/or the BUC fuse(s):
o
Use T3A (3 Amp) 250V fuses for modem operation (left-hand receptacle).
o
Use T6.3A (6.3 Amp) 250V fuses when a Block Upconverter (BUC) is installed (right-hand
receptacle).
CAUTION – FOR CONTINUED OPERATOR SAFETY, ALWAYS REPLACE THE FUSES
WITH THE CORRECT TYPE AND RATING.
•
Screw either fuse holder back into its receptacle.
3–20
Chapter 4. UPDATING FIRMWARE
4.1
Updating Firmware via Internet
BE SURE TO OPERATE THE CDM-625 WITH ITS LATEST AVAILABLE FIRMWARE.
The CDM-625 Advanced Satellite Modem is factory-shipped with its latest version of operating
firmware. If a firmware update is needed, once Ethernet connectivity has been established with
the unit, you can download the update archive file from the Comtech EF Data Web site
(www.comtechefdata.com), or obtain it through e-mail from Comtech EF Data Product Support.
You can perform the CDM-625 Firmware Update without opening the unit as follows:
4.2
•
Connect the rear panel serial “Remote Control” port or “10/100 Ethernet” port to a serial or
10/100 BaseT Ethernet port of the user PC.
•
Download the firmware update archive file via the Internet to the user PC.
•
Use File Transfer Protocol (FTP) to transfer the extracted firmware update files from the
user PC to the UNIT.
About Firmware Files, Naming, Versions, and Archive Formats
Comtech EF Data’s Web site catalogues its firmware update
files by product type (e.g., modem, converter, etc.) and
specific model/optional configuration. The hyperlinks appear
as per the example to the right. This example depicts the
F0020534*_V### base modem bulk firmware download
hyperlink (where ‘###’ indicates the firmware version
number, and ‘*’ denotes the revision letter of that version).
In addition to this base modem bulk firmware archive file, downloads are available for the
UNIT’s optional IP Packet Processor Module, available with or without AES Encryption. This
module requires separate firmware update.
4–1
CDM-625 Advanced Satellite Modem
Updating Firmware
Revision 15
MN-CDM625
Firmware updates are available from Comtech EF Data as follows:
Web Hyperlink
EXE/ZIP Filename
F12864*_V###
FW12864*
F0020534*_V###
Fw-0020534*
F0000342*_V###
FW0000342*
CONTACT CEFD
FW0000438*
Contains Image File ( where ‘ * ’ denotes revision letter)
Fw12864*.bin
Base modem firmware up to FW Version 1.6.0
Fw-0020534*.bin
Base modem firmware from FW Version 2.0.1 to current
FW-0000342*.bin
IP Packet Processor Module option without AES Encryption.
FW-0000438*.bin
IP Packet Processor Module option with AES Encryption.
Only firmware for the CDM-625 base modem and IP Packet Processor Module
without AES Encryption is available for download from the CEFD Web site. To
obtain the firmware update for the CDM-625 IP Packet Processor Module with AES
Encryption, contact Network Product Customer Support:
Phone: 480.333.2433
E-mail: [email protected].
The firmware download files are available from Comtech EF Data in two archive file formats:
*.exe (self extracting) and *.zip (compressed). Some firewalls will not allow the downloading of
*.exe files; in this case, download the *.zip file instead. If applicable, one version prior to the
current release is also available for download.
For additional help with "zipped" file types, refer to the help files provided with the
"PKZIP for Windows", "WinZip", or "ZipCentral" file archiving programs. “PKZIP for
Command-line” is not supported due to file naming conventions.
To verify the correct firmware number, see Step 2 in Sect. 4.3.1 Getting Started: Preparing for
the Firmware Download.
4–2
CDM-625 Advanced Satellite Modem
Updating Firmware
4.3
Revision 15
MN-CDM625
Firmware Update Procedure
4.3.1 Getting Started: Preparing for the Firmware Download
Step
1
2
Task
Connect the Windows-based user PC to the CDM-625:
•
Connect the appropriate modem Ethernet port either via a hub or a switch or directly with an Ethernet or
crossover cable. Make sure that a compatible web browser is running on the PC.
•
Connect the modem “Remote Control” port to a serial port on the PC. Make sure that a terminal emulator
program such as Hyper Terminal is running on the PC.
Identify the CDM-625 configuration in use, and its firmware number and current version:
A. For the CDM-625 Base Modem, the firmware number and running version can be obtained as follows:
•
From the modem front panel – The firmware version is available from the VFD’s top-level “splash” screen. To
view this screen, press the [CLEAR] key several times.
The firmware numbers are provided within the SELECT: UTIL  Firmware  Info  Image#1 or
Image#2 menu screens. For more information, see Chapter 5. FRONT PANEL OPERATION.
•
From HTTP via the Base Modem Web Server Interface – The Bootrom, Bulk1 and Bulk2 firmware loads may
be viewed on the Admin | Firmware | Base Modem page. For more information, see Chapter 6.5. Web
Server (HTTP) Interface.
•
Using serial Remote Control query – The firmware number, versions, and revision level can be queried as
follows:
o
The condensed query displays the firmware version – Type <0/SWR?
o
The detailed query displays the complete firmware load information – Type <0/FRW?1 (for Image 1) or
<0/FRW?2 (for Image 2)
For more information, see Appendix D. SERIAL REMOTE CONTROL.
B. For the CDM-625 with installed IP Packet Processor, the firmware number and running version can be
obtained as follows:
•
From the modem front panel – Select the Utilities: Firmware  Packet-Processor  Info  Image#1 or
Image#2 menu trees. For more information, see Chapter 5. FRONT PANEL OPERATION.
•
From HTTP via the Base Modem Web Server Interface – Select the Admin | Firmware | Packet Processor
page. The Bootrom, Bulk1 and Bulk2 firmware loads may be viewed here. For more information, see Chapter 6.5
Web Server (HTTP) Interface.
•
Using serial Remote Control query – Use the IP Packet Processor’s firmware revision query <0/VS1? (Image
1) or <0/VS2? (Image 2).
For more information, see Appendix D. REMOTE CONTROL.
4–3
CDM-625 Advanced Satellite Modem
Updating Firmware
Step
3
Revision 15
MN-CDM625
Task
Create a temporary folder (subdirectory) on the user PC for the firmware archive file download.
•
Drive letter “c:” is used in these examples. Any valid, writable drive letter can be used.
•
Typical for all tasks: Type the command without quotes, and then press Enter to execute.
A temporary folder may be created on a Windows-based PC using differing methods:
A. Use the Windows Desktop to create and rename the temporary folder.
•
Right-click anywhere on the desktop to open the popup submenu, and then select New > Folder to create the
temporary folder. The “New Folder” will be created on the desktop.
•
Right-click on the “New Folder” and then select ‘Rename’ from the popup submenu. Rename this folder to
"temp" or some other convenient, unused name.
B. Use Windows Command-line to create the temporary folder.
•
First, click [Start] on the Windows taskbar, and then click the Run... icon (or, depending on Windows OS
versions prior to Windows 95, click the MS-Command-line Prompt icon from the Main Menu).
•
Next, open a Command-line window…
•
o
For Windows 95 or Windows 98, type “command”.
o
For any Windows OS versions later than Windows 98, type “cmd” or “command”.
o
Alternately, from [Start], select All Programs > Accessories > Command Prompt.
Finally, from the Command-line prompt (c:\>), type “mkdir temp” or “md temp” (mkdir and md stand for
make directory), and then click [OK].
C. Use the ‘Run’ and ‘Browse’ windows to create and rename the temporary folder.
•
Select [Start] on the Windows taskbar, and then click the Run... icon. The ‘Run’ window will open.
•
Click [Browse] in the ‘Run’ window. The ’Browse’ window will open.
•
Click the Create New Folder icon in the ‘Browse’ window. The “New Folder” will be created.
•
Right-click the “New Folder” folder name, and then rename this folder to “temp” or some other convenient,
unused name.
There should now be a "temp" folder created and available for placement of the firmware archive file
download.
4–4
CDM-625 Advanced Satellite Modem
Updating Firmware
Revision 15
MN-CDM625
4.3.2 Downloading and Extracting the Firmware Update
Step
1
Task
Download the correct firmware archive file to the user PC temporary folder.
A. Go online to www.comtechefdata.com.
B. On the Main page – under Support Information or the Support tab, select the Software Downloads hyperlink.
C. On the Software Downloads page – click Download Flash and Software Update Files.
D. On the Flash & Software Update Files page – select the (Select a Product Line) Modems hyperlink.
E.
On the Modems product page – select the CDM-625 product hyperlink.
F.
Select the appropriate firmware EXE or ZIP download hyperlink (i.e. the CDM-625 Base Modem, or the CDM625 with IP Packet Processor without AES Encryption; otherwise, contact CEFD Network Product Customer
Support to obtain the firmware download for the IP Packet Processor with AES Encryption).
Refer to the table in Sect. 4.2 About Firmware Numbers, File Versions, and Formats in this chapter for the
naming and availability of the firmware download hyperlinks, archive files, and downloaded image files.
G. Download the archive file to the temporary folder.
Once the EXE or ZIP hyperlink is selected, the ‘File Download’ window opens and prompts selection of
[Open] or [Save]:
2
•
Click [Open] to turn over file extraction to the user-supplied utility program. Be sure to extract the
firmware files to the “temp” folder created earlier.
•
Click [Save] to open the ‘Save As’ window. Be sure to select and [Save] the *.exe or *.zip archive file to
the “temp” folder created earlier.
•
Otherwise, click [Cancel] to quit and exit the file download process.
Extract the firmware files from the downloaded *.exe or *.zip archive file with the user-supplied utility program (if not
already done with File Download > [Open]).
A.
For the Base Modem update, a minimum of two files should be extracted:
•
Fw12864*.bin or Fw-0020534*.bin – The base modem bulk image file (where ‘*’ is the revision letter).
•
CDM625_ReleaseNotes_v###.pdf (or a variation of this filename, where “###” is the firmware version).
B. For the IP Packet Processor update, a minimum of two files should be extracted:
•
Without AES – FW-0000342*.bin (where ‘*’ is the revision letter) – or –
•
With AES – FW000438x.bin (where ‘*’ is the revision letter).
•
CDM625_ #.#.#_ReleaseNotes.pdf (or a variation of this filename, where “#.#.#” is the firmware
version).
4–5
CDM-625 Advanced Satellite Modem
Updating Firmware
Step
3
Revision 15
MN-CDM625
Task
Confirm availability of the firmware files in the temporary folder. There are a number of ways the user may view the
contents of the temporary folder on a Windows-based PC:
A. From the Windows Desktop:
•
Double-left-click the “temp” folder saved to the Windows Desktop.
•
Use Windows Explorer to locate, and then double-left-click the “temp” folder.
•
Use the ‘Browse’ window ([Start] > ...Run > [Browse]) to locate, and then double-click the “c:\temp”
folder.
B. Using Command-line:
•
Type “cd c:\temp” at the prompt to change to the temporary directory created earlier using Commandline.
•
Type “dir” to list the files extracted to the temporary directory from the downloaded archive file.
The firmware files have been successfully downloaded to the user PC and are now available for FTP
upload to the CDM-625.
4–6
CDM-625 Advanced Satellite Modem
Updating Firmware
Revision 15
MN-CDM625
4.3.3 Executing the Ethernet FTP Upload Procedure
Important note about firmware updates: When updating the CDM-625 firmware to
the current (e.g., Fw-0020534X Version 2.3.1) release from FW/12864AC Version 1.5.3 or
lower, the firmware update MUST be FTP’d three times (3X) in order to program it
correctly into both images.
After each FTP, the active image MUST be switched, and the modem MUST be rebooted
from the other image.
Step
Task
1
Verify that the Base Modem firmware update has been downloaded to the user PC and is available in the temporary
folder, and ensure that the user PC is properly connected to the CDM-625.
2
Confirm that there is proper connection and communication between the user PC and the modem.
First, determine the IP Address as follows:
•
Using the front panel – SELECT: CONFIG  IP  Addresses  Add/Range
•
Using serial Remote Control query – <0/IPA?
Then, use Command-line to “ping” the modem:
•
From Windows, click [Start] on the Windows toolbar, and then select the Run... option (as an alternative, use
the ‘Command-line Prompt’ or ‘Command Prompt’ icon in the Start menu):
o
o
Using Win95 or Win98 – Type “command”.
Using WinNT, Win2K or WinXP – Type “cmd”.
Type “ping xxx.xxx.xxx.xxx” at the Command-line prompt (where "xxx.xxx.xxx.xxx" is the CDM-625 IP Address). The
results should confirm whether or not the modem is connected and communicating.
3
4
Use Command-line to initiate the FTP session with the CDM-625.
A.
Type "ftp xxx.xxx.xxx.xxx" (where "xxx.xxx.xxx.xxx" is the CDM-625 IP Address).
B.
If the optional IP Packet Processor is installed and enabled, enter the User Name and Password when
prompted. Otherwise, press ENTER.
C.
Type "bin" to set the binary transfer mode.
D.
Type "prompt", and then type "hash" to facilitate the file upload.
Upload the file:
•
If the IP Packet Processor is not installed or is installed but disabled, type "put Fw-0020534*.bin bulk:"
(where ‘*’ denotes the revision letter) to begin the file transfers – the destination “bulk:” must be all lower
case.
•
If the IP Packet Processor is installed and enabled, type “put Fw-0020534*.bin” (i.e., as per Step 3(A)
but without typing the destination “bulk:”).
For either selection, it will take a few seconds to transfer the file.
4–7
CDM-625 Advanced Satellite Modem
Updating Firmware
Step
5
Revision 15
MN-CDM625
Task
Observe the file upload process:
A. The PC should report that the file transfer has occurred, and the CDM-625 front panel will display:
Programming bulk flash – (Block ID)…
Please wait…
B. The process sequences through several blocks – this will take several minutes. When it has finished, the
CDM-625 front panel will display:
Bulk FTP done. Press CLEAR.
C. Type “bye” to terminate the FTP session, and then close the Command-line window.
D. Verify that the new firmware version has uploaded using any of the methods described in Step 2 in Sect.
4.3.1.
E.
If you are running a CDM-625 Base Modem without the optional IP Packet Processor, you may now
reboot the system to activate the new firmware. However, if you are running a CDM-625 equipped
with the optional IP Packet Processor installed, do NOT reboot at this time – proceed to Step 6 to
continue the Ethernet FTP Upload Procedure.
From the Admin| Reboot web page, click [Reboot Now]. Both the web page and the CDM-625 front panel
will display “Rebooting, Please wait...”
The system reboot has completed once the CDM-625 front panel displays the top-level “splash” screen:
Comtech CDM-625 Advanced Satellite Modem
Ver2.3.1
You will need to log in to a new Web session at this time.
If you are a Base Modem user, the CDM-625 is now operating with its latest firmware. The firmware update
process is now complete.
6
Upgrading the IP Packet Processor:
Use Command-line to initiate the FTP session with the modem.
A.
Type "ftp xxx.xxx.xxx.xxx" (where "xxx.xxx.xxx.xxx" is the CDM-625 IP Address).
B.
Enter the Admin User Name and Password to complete login.
C.
Type "bin" to set the binary transfer mode.
Type "prompt", and then type "hash" to facilitate the file upload.
7
Upload the firmware file from the temporary folder on the user PC:
Type “put FW#######*.bin” (where ‘#######’ is the designated image FW file number – 0000342 or 0000438 –
and ‘*’ is the revision letter) to begin the file upload.
It will take several minutes to transfer and write the files to flash memory.
4–8
CDM-625 Advanced Satellite Modem
Updating Firmware
Step
8
Revision 15
MN-CDM625
Task
Observe the file upload process:
A. The PC should report that the file transfer has occurred, and the display on the modem will report:
Packet Processor upgrading Bootrom
Please wait…
Followed by:
Packet Processor upgrading Image
Please wait…
B. The process will complete in less than a minute. When it has finished, the modem front panel will display:
Packet Processor upgrade complete
Press CLEAR to continue.
C. Type "bye" to terminate the FTP session, and then close the Command-line window.
D. Verify that the new file has loaded into its designated Image slot by viewing the Admin | Firmware | Packet
Processor web page (as per Step 2 in Sect. 4.3.1). Press the PC’s F5 key to ensure that the web page has
properly refreshed.
E.
Change the desired image to boot using the Admin | Firmware | Packet Processor web page: Use the
Boot From drop-down menu to boot the system from Latest (or the Image slot that was automatically
selected for the FTP upload) then click [Submit] to save this change.
F.
Use the Admin| Reboot web page to reboot the system to activate the new firmware:
Click [Reboot Now]. Both the web page and the CDM-625 front panel will display “Rebooting, Please wait...
If the Top Card Application has been changed, when booting into a new image an
additional step will occur as the modem downloads to a different flash memory. This
additional upload takes approximately two minutes. The following messages will appear
on the CDM-625 front panel display:
Programming Top-App to Top Card Flash.
Please wait…
Followed by:
Send packet xxx of yyy to Top Card.
Please wait…
Then:
Top Card programming was successfully
completed.
4–9
CDM-625 Advanced Satellite Modem
Updating Firmware
Step
8
(cont.)
Revision 15
MN-CDM625
Task
G. The system reboot has completed once the CDM-625 front panel displays the top-level “splash” screen:
Comtech CDM-625 Advanced Satellite Modem
PktP present
Ver2.3.1
You will need to log in to a new Web session at this time.
The Ethernet FTP Upload Procedure is now complete. The CDM-625 Advanced Satellite Modem is now
operating with its current firmware.
4–10
Chapter 5. FRONT PANEL
OPERATION
5.1
Overview
Local monitor and control (M&C) of the CDM-625 Advanced Satellite Modem is accomplished
using its front panel. Figure 5-1 highlights the CDM-625 front panel available features and
functions.
Feature
See Chapter
Section...
Description
Function
LED Indicators
The LEDs indicate, in a summary fashion, the status of the modem.
5.1.1
2
Keypad
The keypad comprises six individual keyswitches. The keys have a
positive ‘click’ action that provides tactile feedback. Enter data via
the k eypad. D ata, pr ompts, and m essages ar e di splayed on t he
VFD.
5.1.2
3
Vacuum
Fluorescent
Display (VFD)
The VFD i s an ac tive di splay s howing t wo l ines of 40 characters
each. It produces a blue light with adjustable brightness. Nested
menus (Figure 5-2) display all available options and prompt you to
carry out a required action.
5.1.3
1
Figure 5-1. CDM-625 Front Panel Features
5–1
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.1.1 LED Indicators
In general, the Alarm relay state reflects the state of
the Front Panel LEDs. For example, if the Unit Status
LED is red, the Unit Alarm relay is active, etc. The
sole exception is the Transmit Traffic relay – it does
not reflect the state of the Tx carrier; it activates
only if a Transmit Traffic Fault exists.
The function of the eight front panel LED indicators is as follows:
LED
UNIT STATUS
State
Function
Green
No Unit Faults or Traffic Faults.
Orange
No Unit Faults, but a Traffic Fault exists.
Red
A Unit Fault exists (Example: PSU fault).
Tx (Transmit)
TRAFFIC
Green
Rx (Receive)
TRAFFIC
Green
Off
Off
Green
ONLINE
STORED EVENT
Off
Orange
Off
REMOTE
EDMAC MODE
A Tx Traffic fault exists OR the Tx Carrier is in OFF state.
No Rx Traffic Faults (demod and Viterbi decoder are locked, everything is OK).
An Rx Traffic fault exists (the demod may still be OK).
The Unit is Online and carrying traffic.
The Unit is Offline (Standby) – forced by externally connected 1:1 or 1:N
redundancy system.
There is a Stored Event in the log, which can be viewed from the front panel, or
retrieved via the remote control interface.
There are no Stored Events.
Orange
The Unit is in Remote Mode – local monitoring is possible, but no local control.
Flashing
ODU control has been enabled, and there is a communications fault, or there is
an ODU status fault.
Off
The Unit is in Local Mode – remote monitoring is possible, but no remote
control.
Orange
Framing on, EDMAC on, and unit defined as Slave – local monitoring is
possible, but no local control.
Off
TEST MODE
No Tx Traffic Faults.
Orange
Off
No EDMAC, EDMAC Master, or Transparent mode is selected.
A Test Mode is selected (Example: IF Loopback).
There is no Test Mode currently selected.
5–2
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.1.2 Keypad
The keypad has an auto-repeat feature. If you hold
down a key for more than one second, the key action
repeats, automatically, at the rate of 15 keystrokes per
second. This is particularly useful when editing numeric
field with many digits, such as frequency or data rate.
The function of the keypad is as follows:
Key
Description
ENTER
Use t his k ey to di splay t he ne sted m enu f or a s elected f unction, or t o ex ecute ( save) a
configuration change.
CLEAR
Use t his ke y t o back out of a s election or t o c ancel a c onfiguration c hange t hat has not been
executed using ENTER. Press CLEAR to return to the previous menu screen.
◄►
(Left, Right)
Use these keys to navigate between available selections, or to move the cursor position, on any
menu screen.
▲▼
(Up, Down)
Use these keys primarily to change the alphanumeric selection ( i.e., numbers for configuration
data, l etters f or t ext s trings) at t he c urrent c ursor pos ition, o r to s croll t hrough pr e-defined
parameter settings that may be provided at the current cursor position.
5–3
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.1.3 Vacuum Fluorescent Display (VFD)
The CDM-625 features a Vacuum
Fluorescent Display (VFD). The VFD is
an active display showing two lines of
40 characters each. It produces a blue
light with adjustable brightness. Compared to a Liquid Crystal Display (LCD), the VCD provides
superior viewing characteristics and does not suffer problems of viewing angle or contrast.
On most menu screens, you will observe a flashing solid block cursor, which blinks at a once-persecond rate. This indicates the currently selected menu item, digit, or field. Where this solid
block cursor would obscure the item being edited (e.g., a numeric field) the cursor automatically
changes to an underline cursor.
5.1.3.1
Screen Saver
If the operating unit is left displaying
the same screen for weeks at a time,
the VFD could become burnt with this
image. To prevent such burn-in, a
screen saver feature activates after one hour. The screen saver messages loop from right to left
across the screen. The top line of the display shows the user-editable Circuit ID; the bottom line
shows the current status of the modem followed by the message ‘Press any key…’ as shown
here. Press any key to restore the previous screen.
5.1.3.2
Opening Screen
The front panel displays provide the visual means to fully control and monitor operation of the
CDM-625. The first screen to display, after turning the power on, is the read-only opening
screen:
Comtech CDM-625 Advanced Satellite Modem
Ver2.1.0
This screen identifies the modem model, its installed firmware version, and information about
installed hardware options. From any other nested menu, press CLEAR repeatedly to access this
screen.
5.1.3.2.1 Feature Availability/Operation Indicators via the Opening Screen
Comtech CDM-625 Advanced Satellite Modem
TPC,CnC,VFEC,PktP present
Ver2.1.0
•
TPC/LDPC Codec – If installed, the display also indicates TPC.
5–4
CDM-625 Advanced Satellite Modem
Front Panel Operation
•
•
•
Revision 15
MN-CDM625
Sect. 7.6 Turbo Product Codec (Hardware Option)
Sect. 7.7 TPC and Low Density Parity Check (LDPC) coding
DoubleTalk Carrier-in-Carrier Module – If installed and enabled, the presence of CnC is
indicated with the appearance of the flashing CnC icon on the following front panel SELECT:
menus: CONFIG CnC; Test; Info; and Monitor.
Chapter 10. DOUBLETALK CARRIER-IN-CARRIER OPTION
•
VersaFEC Card – If installed, the display also indicates VFEC.
Sect. 7.8 VersaFEC (Short-block LDPC)
•
IP Packet Processor Card – If installed, the display also indicates PktP.
Chapter 18. IP PACKET PROCESSOR OPTION
•
CDM-600/600L Emulation Indication – The CDM-625 serves as a ‘drop-in’ replacement
product for CDM-600 and CDM-600L modems. An emulation mode is provided to
accomplish this design intent, and is configurable via either the front panel (SELECT:
UtilityEm) or by remote control (remote command EMU=).
When emulating a CDM-600 or CDM-600L modem, the UNIT opening screen displays the
mode of operation, as per this example:
Comtech CDM-625
emulating a CDM-600
TPC,CnC,VFEC,PktP present
Ver2.2.6
Note that, while emulating a CDM-600 or CDM-600L modem, the I/O responses (including
that of remote query EID?) replicate those of the emulated modem; further, the firmware
version number displayed on the opening screen, and the response from the SWR? remote
query reflects that of the emulated modem’s firmware version number.
•
Warm-up Delay Mode counter – When selecting the warm-up delay mode, the modem
turns the carrier off during the warm-up time and the countdown message “HighStability Ref Warming up : ### sec” displays on the bottom line of the screen
as follows:
Comtech CDM-625
emulating a CDM-600
High-Stability Ref warming up: 009 sec
5–5
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2
Revision 15
MN-CDM625
SELECT: (Main) Menu
SELECT: Configuration Test Monitor
Info Store/Ld Utility ODU FAST
()
Figure 5-2 shows the hierarchal structure of the unit principle menu tree from the SELECT: menu
on down.
Press ENTER or CLEAR to immediately access the SELECT: menu screen from the opening screen.
From any nested menu, press CLEAR repeatedly until this screen reappears.
The table that follows identifies each menu branch available from the SELECT: menu and its
content section in this chapter. Functionality of each menu sub branch is further explained in
the subsequent chapter sections.
Menu Branch
Sect.
Function
Configuration
5.2.1
Use to fully configure the modem.
Test
5.2.2
Use to configure the modem into one of several Test modes, and to
configure/monitor the BER Tester.
5.2.3
Use to monitor the current status of the modem and to view the log of stored
events for the modem.
Info
5.2.4
(Information) Use to view information on the modem without having to access
the Configuration screens.
Store/Ld
5.2.5
(Store/Load) Use to store and retrieve up to 10 different modem configurations.
Utility
5.2.6
Use to perform miscellaneous functions – e.g., setting the Real-Time Clock,
adjusting the VFD brightness, etc.
Monitor
ODU
5.2.7
(Outdoor Unit) Depending on 70/140 MHz or L-Band operation: Use to monitor
and control a standalone or redundant Comtech EF Data RF Transceiver
(CSAT-5060 or KST-2000A/B) or LPOD BUC if connected.
See Appendix F. CDM-625 ODU (TRANSCEIVER, BUC, LNB) OPERATION
for full details.
FAST
5.2.8
(Fully Accessible System Topology) Use to configure available options – e.g.,
extended dat a r ates, i nterfaces, et c. C ontact Comtech EF D ata C ustomer
Support for details.
The actual choices displayed in the submenus may vary according to which
FAST options have been activated and enabled. Where a FAST option affects a
menu, this is shown in the descriptive text.
From the top SELECT: menu, use the ◄ ►arrow keys to select from the choices shown, and then
press ENTER to continue.
5–6
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Figure 5-2. CDM-625 Principle Menu Tree (FW Ver. 2.3.1)
5–7
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1 SELECT: Configuration Menus
CONFIG: All Mode Tx
CnC EDMAC Misc Mask
Rx Clocks D&I/ACM
Remote IP
()
Use the ◄ ►arrow keys to select from the submenu choices shown, and then press ENTER. The
submenus available from the Configuration menu are as follows:
Submenu
Sect.
Function
All
5.2.1.1
This submenu is hi ghly r ecommended f or new us ers, as i t l eads you through the
complete modem configuration process on a step-by-step basis.
Mode
5.2.1.2
Used to select Frame Type and Data Format for Tx and Rx.
Tx
5.2.1.3
(Transmit) Used to define, on a parameter-by-parameter basis, the Tx configuration of
the unit. These menu submenu branches would be us ed if you wished to change, for
example, just the Tx Frequency.
Rx
5.2.1.4
(Receive) Used to define, on a p arameter-by-parameter basis, the Rx configuration of
the unit. These menu submenu branches would be us ed if you wished to change, for
example, just the Rx data rate.
Clocks
5.2.1.5
Used to select Tx-Clocking, Rx-Buffer/Clock, or External Reference.
D&I
5.2.1.6
Used to select (Quad) Drop & Insert options (NOT SELECTABLE/VISIBLE IN IP-ACM
MODE).
ACM
5.2.1.7
(VersaFEC® Adaptive Coding and Modulation) Used to c onfigure ACM operating
parameters. (SELECTABLE/VISIBLE IN PLACE OF D&I IN IP-ACM MODE ONLY).
CnC
5.2.1.8
(DoubleTalk Carrier-in-Carrier) Used t o s elect D oubleTalk Carrier-in-Carrier ( CnC)
options.
EDMAC
5.2.1.9
Used to select EDMAC options.
Misc
5.2.1.10
(Miscellaneous) Used to select, view, or change various other parameters.
Mask
5.2.1.11
Used to activate or MASK an alarm condition.
Remote
5.2.1.12
(Remote Control) Used to define whether the unit is being controlled locally, remotely,
or via IP, and to configure the serial Remote Control parameters: baud rate, I/O format,
address.
IP
5.2.1.13
Used t o c onfigure v arious I P par ameters, i ncluding I P addr ess, gat eway, M AC
addresses, VLAN, and QoS.
Only one method of remote access may control the modem at a time. The modem
may be monitored over the remote control bus at any time (i.e., queries only), and
the front panel may be viewed.
To make configuration parameter changes from the front panel, Local Mode is
required. Via serial remote, Remote Mode is required. Via IP, Ethernet Mode is
required.
5–8
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.1.1
Revision 15
MN-CDM625
CONFIG: All
All = Stop
(Stop, Start)
Use this menu to configure the unit on a step-by-step basis. Every available configuration menu
displays in succession. Use the ▲▼ arrow keys to select Stop or Start, and then press ENTER to
execute. Then:
•
Use the ◄ ►arrow keys to select, and the ▲▼ arrow keys to edit, parameters as needed.
•
Press ENTER to continue through all the configurations.
•
Press CLEAR to discontinue.
Configuration Notes:
5–9
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.1.2
Revision 15
MN-CDM625
CONFIG: Mode
MODE is a key parameter when configuring the modem. To simplify the menu
choices, you must first determine the INTERFACE and FRAMING type for both
Transmit and Receive. Once these have been selected, you are presented only with
menu choices that are applicable to those particular modes. For example:
•
If selecting a G.703 interface, the data rate menu is restricted to only the
appropriate G.703 rates.
•
If selecting an IDR framing mode, the data rate choices are limited to only
those rates specified by IESS-308.
Mode: Tx=RS422:NONE
Rx=RS422:None
(422,V35,G703s,Audio,LVDS,HSSI,IP,ASI)
The screen shown here depicts an Interface Type menu screen. You may select Interface Type
and Framing for both Tx and Rx from this menu. Use the ◄ ►arrow keys to select the
parameter to edit. The bottom line indicates the available options for the active parameter. Not
all options are always available – they depend on other settings or on the modem’s activated
FAST options.
The first parameter is the Interface Type. The options are:
► IP-ACM
► G.703s:
o G.703B (Balanced)
o G.703U (Unbalanced)
► LVDS
► HSSI
► IP
► ASI
► RS422
► V.35
► Audio
Interface Notes:
1. The IP-ACM mode choice restricts the available framing types to NONE or EDMACs.
Chapter 17. ADAPTIVE CODING AND MODULATION (ACM)
2. The list of available Interface Types includes Audio when a unit ships with the Two
Channel Audio Drop Hardware Option installed. The Audio mode choice permits you
to carry 2 x 32 kbps ADPCM audio as the primary data. This mode restricts the
available framing types to IBS or EDMAC (see the selection table and the
explanations on the next page).
Use the ▲▼ arrow keys to scroll through the available options, and then press ENTER.
If the cursor is on the second parameter – the Framing Type – the display appears as shown:
Mode:Tx=RS422:NONE
Rx=RS422:None
(None IBS IDR D&Is EDMACs ESC++)
5–10
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Use the ▲▼ arrow keys to scroll through the available options, and then press ENTER. The
available Framing Types are as follows:
Framing Type
Comments
► None
---
► IBS (FAST option)
---
► IDR (FAST option)
---
► D&Is (Drop & Insert)
(FAST option) which includes:
o
D&I
(FAST option)
The D&I (Drop and I nsert) multiplexer works in conjunction with the G.703
interfaces to enable the modem to transmit or receive fractional parts of a
T1 or E1 data stream.
o
D&I++
(FAST option)
D&I++ is anot her C omtech pr oprietary f raming – it is a c losed-network
frame structure, similar to D&I, but which permits AUPC and EDMAC. See
Chapter 9 . C LOCK M ODES a nd D ROP & I NSERT ( D&I) for f urther
information.
o
QDI (Quad Drop & Insert)
(FAST option)
QDI is another variation of D&I that allows up to four E1 terrestrial ports to
be used.
o
Framed QDI
(FAST option)
Framed QDI is a concatenation of QDI and EDMAC framing.
o
D&I Enhanced
Available – when in E1-CCS; may enable ESC, and then AUPC.
o
EDMAC
EDMAC is C omtech E F Data’s pr oprietary f raming. I t is ba ckwards
compatible with the CDM-500, CDM-550, CDM-550T, CDM-600 and CDM600L. T he f raming per mits bi -directional pas sing of M &C and A UPC
(Automatic Uplink Power Control) data between local and distant-end units.
o
EDMAC-2
(as in the CDM-570)
EDMAC-2 is a reduced overhead version of EDMAC, and is not completely
backwards-compatible with the modems listed above, but is in some modes
(e.g., in T urbo BPSK modes and at rates above 2.048 Mbps). F or further
information, see Chapter 11. EDMAC CHANNEL.
o
EDMAC-3
EDMAC-3 uses t he s ame ov erhead as E DMAC f raming, but t he E DMAC
channel operated at 1/3 the rate of original EDMAC. Most of the overhead
is dedi cated t o c arrying t he r emote m odem’s c omplete s tatus i nformation
(including AUPC) to the near-end modem very quickly. T ailored to SNMP
proxy appl ications. F or f urther i nformation, s ee Chapter 11. E DMAC
CHANNEL.
► EDMACs which include:
► ESC++
ESC++ is anot her C omtech pr oprietary f raming – it is a c losed-network
frame s tructure, w hich per mits A UPC, E DMAC and ESC. F or f urther
information, see Chapter 12. ESC++.
5–11
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.1.3
Revision 15
MN-CDM625
CONFIG: Tx
Tx-IF Freq Power FEC Mod Data Scrambler
(Data 00192.000kbps, 00131.657ksps) ()
On the top line – Use the ◄ ►arrow keys to select Tx-IF, Freq, Power, FEC, Mod, Data (Symb
when in IP-ACM mode), or Scrambler, and then press ENTER.
On the bottom line – Read-only Data/Symbol rate information is provided.
When Sub-Mux is ON, Composite Rate information replaces the Data Rate
information on the bottom line of this display.
5.2.1.3.1 CONFIG: Tx  Tx-IF
Tx: Carrier=On (Off,On,RTI)
POCO=Off
SpectrumInvert=Off Txα=.35(.35,.25)()
Use the ◄ ►arrow keys to select Carrier, POCO (Power-On Carrier-Off), SpectrumInvert, or Txα
(for Tx Alpha Filter Rolloff Factor), and then use the ▲▼ arrow keys to edit the option setting
(the available choices may be shown in parentheses). Press ENTER when done.
•
For the Carrier, use the ▲▼ arrow keys to select Off, On, RTI-01s, RTI-02s, RTI-04s, RTI-07s,
or RTI-10s, and then press ENTER when done.
USE THE RTI FEATURE WITH EXTREME CARE! RTI (RECEIVE/TRANSMIT INHIBIT),
when selected, prevents transmission of the Tx carrier until the demodulator is
locked. To avoid shutdown of the Tx Carrier when the demodulator loses lock
for a very short duration, before the transmit carrier is inhibited the
demodulator must be unlocked continuously for the selected time period (1, 2,
4, 7, or 10 seconds).
Enabling RTI does not affect the Internal IF Loopback feature. However, be
aware that, if an External IF Loopback is attempted (i.e., connecting an external
cable from the Tx IF output to the Rx IF input), this will not work! (The Tx carrier
cannot turn on until the demod is locked – the demod cannot lock because the
Tx output is off. The net result is that the demod will not lock and the Tx carrier
will not turn on.)
•
When POCO (Power-On Carrier-Off) is enabled (selected as ON), this feature overrides the
Tx setting to OFF in the event of a power-cycle of the modem. Use with caution.
SPECTRUM INVERT should normally be in the OFF position. For all FEC types
except BPSK, when Spectrum Invert is in the ON position the transmit spectrum
is inverted (which is the same as reversing the direction of phase rotation in the
5–12
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
modulator). In BPSK, the time-order of bits out of the FEC encoder is reversed to
make the modem compatible with certain other manufacturer modems.
•
For the Txα (Tx Alpha Filter Rolloff Factor) selection, you may select 0.25 instead of the
default value of 0.35.
5.2.1.3.2 CONFIG: Tx  Freq (Frequency)
Tx-IF Frequency:
0050.0000 MHz
()
To edit the Tx-IF Frequency, use the ◄ ►arrow keys to select a digit to edit, and then use the
▲▼ arrow keys to change that digit. The available ranges are 50-180 MHz, and 950-2000 MHz
(L-Band) (FAST option). The resolution is 100Hz. Press ENTER when done.
When you use the ODU menus to configure a BUC LO-frequency, this menu displays a second
line of information:
Tx-IF Frequency:
1750.0000 MHz
(LO:12500 MHz Sat:14250.0000 MHz) ()
As you edit the IF frequency, the Satellite frequency updates accordingly.
Satellite frequency = LO ± IF frequency, where the sign ± is determined
by the LO mix parameter:
•
•
High-sided mix [–] (includes a spectral inversion);
Low-sided mix [+].
5.2.1.3.3 CONFIG: Tx  Power
Output Power: Mode= Manual (Manual,AUPC)
Level= –20.0 dBm
()
Use the ◄ ►arrow keys to select the Output Power Mode (top line) or to edit the Output Power
Level (bottom line) and then press ENTER.
On the top line – Use the ▲▼ arrow keys to select the Output Power Mode as MANUAL or
AUPC (see next section for conditional selection).
On the bottom line – To edit the Output Power Level, use the ◄ ►arrow keys to first select a
digit of the Tx Output Power Level, and then use the ▲▼ arrow keys to change that digit. For Tx
frequencies of 50-180 MHz, the permitted level range is 0 to –25dBm. For 950-2000 MHz
(L-Band), the range is 0 to –45dBm. Press ENTER when done.
5–13
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.1.3.3.1
Revision 15
MN-CDM625
CONFIG: Tx  Power  Mode  AUPC
Chapter 8. AUTOMATIC UPLINK POWER CONTROL (AUPC)
The AUPC Output Power Mode Is selectable only when the T0x framing is EDMAC, D&I++, ESC++
or D&I. Otherwise, if you attempt to select the Output Power Mode as AUPC, you are blocked
from selecting AUPC and a message displays on the bottom line:
Output Power: Mode= AUPC
(Manual,AUPC)
! AUPC needs supporting framing mode !
Otherwise, with an appropriate framing type selected, the bottom line appears as shown:
Output Power: Mode= AUPC
(Manual,AUPC)
Target-EbNo-Range
Alarm-Action ()
Use the ◄ ►arrow keys to select Target-EbNo-Range or Alarm-Action and then press ENTER.
CONFIG: Tx  Power  Mode  AUPC  Target-EbNo-Range
Minimum EbNo of Remote Modem = 5.0dB
Max Permitted Power Increase = 9dB ()
On the top line – To edit the Target Eb/No of the remote modem, use the ◄ ►arrow keys to
select a digit to edit, and then use the ▲▼ arrow keys to change that digit. The default value is
3.0 dB. The upper limit is 14.9 dB.
On the bottom line – To edit the maximum permitted increase in power level when in AUPC
Mode, use the ◄ ►arrow keys to select a digit to edit, and then use the ▲▼ arrow keys to
change that digit. Press ENTER when done. The default value is 1 dB. The upper limit is 9 dB,
except when CnC Mode is ON – the upper limit value is instead 3 dB.
Press ENTER when done.
CONFIG: Tx  Power  Mode  AUPC  Alarm-Action
Max Tx Pwr Action= None (None, Tx-Alm)
Rem Demod Unlock Act= Nom-Pwr (Nom,Max)
On the top line – To determine the action that occurs if the AUPC causes the maximum output
power level to be reached, use the ▲▼ arrow keys to select None or Tx Alarm.
On the bottom line – To determine the action that occurs if the remote demod is unlocked, use
the ▲▼ arrow keys to select Nom-Pwr or Max-Pwr. Note the following:
5–14
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Selection
Function
Nom-Pwr (Nominal Power)
The output level reverts to the nominal power level set under Manual.
Max-Pwr (Maximum Power)
The output level changes to the maximum permitted.
Press ENTER when done.
CONFIG: Tx  Power  Mode  CnC-APC Mode
Chapter 10. Double Talk Carrier-in-Carrier Option
Selecting CnC Automatic Power Control (CnC-APC) mode displays the following menu:
Output Power Mode = CnC-Auto-Power-Control
Level=-25.0dBm MaxPwrIncrease=2.5dB ()
On the bottom line – To edit the power output level and the maximum permitted increase in
power level when in APC Mode, use the ◄ ►arrow keys to select a digit to edit, and then use
the ▲▼ arrow keys to change that digit. Press ENTER when done.
Note that, when APC is in an active state, the power level values display in the bottom left as
‘AUTO’.
5.2.1.3.4 CONFIG: Tx  FEC
Enc=Vit (Vit,Seq,TCM,TPC,LDPC,VFEC,ULL)
Reed-Solomon=On (Off, On)
()
Use the ◄ ►arrow keys to select Encoder or Reed-Solomon / Diff Encoder, and then press
ENTER.
On the top line – Use the ▲▼ arrow keys to select an available Encoder option (shown in
parentheses), and then press ENTER. The choices are:
► None (i.e., uncoded)
► Vit (Viterbi)
► Seq (Sequential)
► TCM (Trellis Coded Modulation)
8-PSK Rate 2/3 only (FAST option)
► TPC (Turbo)
(Hardware option)
► LDPC (Low Density Parity
Check) (Hardware option)
► VFEC
(VersaFEC Hardware option)
► ULL (Ultra-Low Latency)
(VersaFEC Hardware option)
5–15
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
1.
When selecting None for the Encoder setting, the bottom line of the display changes
from Reed-Solomon to Diff Encoder (Differential Encoding).
2.
The TPC (Turbo) and LDPC encoding selections display only when the optional
TPC/LDPC Codec is installed.
3. The VFEC and ULL encoding selections display only when the optional VersaFEC Codec
is installed.
On the bottom line – When Reed-Solomon is selectable, use the ▲▼ arrow keys to select On or
Off. Press ENTER when done.
CONFIG: Tx  FEC  Reed-Solomon On
Reed-Solomon Encoding =Standard(126/112)
(Standard(126/110),IESS-310(219/201)) ()
Use the ▲▼ arrow keys to select one of the listed parameters, and then press ENTER. Possible
selections, depending on the Framing mode, are as follows:
► IESS-310, open or closed network
219/201
► IBS or D&I
126/112
► EDMAC or EDMAC2, closed network
200/180
► IDR, open network
225/205, 219/201 or 194/178
► ESC++ or D&I++, closed network
126/112
► Unframed closed network:
○ Comtech standard
220/200
○ Legacy EF Data
225/205, with V.35 scrambling
Otherwise, when Diff Encoder is selectable on the bottom line, use the ▲▼ arrow keys to select
On or Off, and then press ENTER:
CONFIG: Tx  FEC  Diff Encoder On
Enc=None(Vit,Seq,TCM,TPC,LDPC,VFEC,ULL)
Diff Encoder=On (Off,On)
()
If selecting Differential Encoding=OFF, there is no way for the modem to resolve
the phase ambiguities associated with PSK modulations. For BPSK there is a 1 in 2
chance that the polarity of the data will be correct. In QPSK there is a 1 in 4
chance the data will be correct.
5–16
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.3.5 CONFIG: Tx  Mod (Modulation)
Mod=QPSK (B,Q,OQ,8PSK,16Q,8QAM)
FEC Rate=1/2 (1/2,3/4,7/8)
()
Use the ◄ ►arrow keys to select the Modulation type (top line) or the FEC rate (bottom line),
and then use the ▲▼ arrow keys to change that parameter selection. The Encoder type dictates
the Modulation Type and FEC rate choices:
Encoder Type
Modulation Type
FEC Rate Choice
No Encoder
BPSK
QPSK, OQPSK
Fixed at 1/1
Fixed at 1/1
Non-Turbo Encoder
BPSK
TCM 8-PSK (FAST option)
QPSK, OQPSK
16-QAM (Vit+RS only)
Fixed at Rate 1/2
Fixed at Rate 2/3
1/2, 3/4, 7/8
3/4, 7/8
TPC
(with TPC/LDPC Codec installed)
BPSK
QPSK, OQPSK
8-PSK (FAST option)
16-QAM (FAST option)
5/16, 21/44
1/2 (aka 21/44), 3/4, 7/8, 0.95
3/4, 7/8, 0.95
3/4, 7/8
LDPC
(with TPC/LDPC Codec installed)
BPSK
QPSK, OQPSK
8-PSK, 8-QAM (FAST)
16-QAM (FAST option)
Fixed at 1/2
1/2, 2/3, 3/4
2/3, 3/4
Fixed at 3/4
VFEC
(with VersaFEC Codec installed)
BPSK
QPSK
8-QAM (FAST option)
16-QAM (FAST option)
Fixed at 0.488
0.533, 0.631, 0.706, 0.803
0.576, 0.642, 0.711, 0.780
0.644, 0.731, 0.780, 0.829, 0.853
ULL
(with VersaFEC Codec installed)
BPSK
QPSK
Fixed at 0.493
0.493, 0.654, 0.734
If selecting TPC from the FEC menu with TPC/LDPC Codec installed, the options appear as
shown:
Mod=QPSK (B,Q OQ,8PSK,16Q,8QAM)
FEC Rate=1/2 (1/2,3/4,7/8,0.95)
()
If selecting VFEC from the FEC menu with VersaFEC Codec installed, the options appear as
shown:
Mod=BPSK (B,Q,8QAM,16QAM)
FEC Rate=0.488 (Fixed)
()
If selecting ULL from the FEC menu with VersaFEC Codec installed, the options appear as shown:
5–17
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Mod=BPSK (B,Q)
FEC Rate=0.493 (Fixed)
()
5.2.1.3.6 CONFIG: Tx  Data
Tx Data Rate
Tx Sub-Mux
()
Use the ◄ ►arrow keys to select Tx Data Rate or Tx Sub-Mux, and then press ENTER.
If Tx Sub-Mux is ON, this menu provides read-only IP Info Rate information on the bottom line:
Tx Data Rate
Tx Sub-Mux
(IP Info Rate: 01200.340 kbps)
()
CONFIG: Tx  Tx Data  Tx Data Rate
Tx Data Rate = 01544.000 kbps
Data Invert=Off Clock Invert=Off
()
Use the top line to edit the Tx Data Rate. The bottom line permits selection of the Data Inversion
or the Clock Inversion features (added for compatibility with certain older equipment).
On the top line – To edit the Tx Data Rate, use the ◄ ►arrow keys to select the digit to edit,
and then use the ▲▼ arrow keys to change that digit. Press ENTER. when done.
The maximum limits for the Tx Data Rate are 18kbps to 25Mbps. The actual minimum and
maximum data rates are dependent on Framing mode, Interface type, Modulation type and FEC
Code Rate. If you change any of the higher-priority parameters – causing the data rate to
become invalid – the Data Rate adjusts automatically. The installed FAST option(s) also dictate
the upper range of data rate.
When configuring for D&I or IDR framing or for G.703 interface type, the ▲▼ arrow keys scroll
through only the available data rates. If you edit the data rate to 1920 kbps while in D&I
framing, a message appears to indicate that E1 Fixed Channel Mode is implemented.
When using G.703, three auxiliary rates (512, 1024 and 2048 kbps) are also available, indicated
by the word AUX appearing to the right of the decimal place (for example, 00512.AUX
kbps).
AUX G.703 Data Rate Connectors Reference: Sect. 3.3.2.5 G.703 IDI (Insert Data In),
DDO (Drop Data Out) Connectors in Chapter 3. REAR PANEL CONNECTOR PINOUTS
5–18
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Note that in QDI (Quad D&I) mode, these data rates are read-only! The data rate is the sum of
the tributary rates for all ports. You must edit them via the QDI menu.
On the bottom line – To set the Data Invert or Clock Invert operation, for either, use the ▲▼
arrow keys to select On or Off. Press ENTER when done.
CONFIG: Tx  Tx Data  Tx Sub-Mux
Tx Sub-Mux = Off (Off, On)
Ratio = 1/9 (IP/Synchronous)
()
Use the ▲▼ arrow keys to select the desired ratio, and then press ENTER. There are a total of
34 ratio options available:
► 1/59
► 1/39
► 1/19
► 1/9
► 1/8
► 1/7
► 1/6
► 1/5
► 1/4
► 2/7
► 1/3
► 2/5
► 3/7
► 1/2
► 3/5
► 2/3
► 3/4
► 4/5
► 1/1
► 5/4
► 4/3
► 3/2
► 5/3
► 2/1
► 7/3
► 5/2
► 3/1
► 7/2
► 4/1
► 5/1
► 6/1
► 7/1
► 8/1
► 9/1
5.2.1.3.7 CONFIG: Tx  Symb (IP-ACM Mode Only)
Chapter 17. ADAPTIVE CODING AND MODULATION (ACM)
VersaFEC ACM requires the correct hardware module (PL-0000264) to be installed in
the unit; Version 1.4.0 (or higher) firmware; and the appropriate FAST code for the
maximum operating symbol rate.
TxSymbolRate = 01000.000 ksps (ACM Mode)
Data Invert=Off Clock Invert=Off ()
Take care to note that the use of IP-ACM is a fundamental departure from the way you would
typically configure the modem. When IP-ACM mode is active, the CONFIG: Tx menu changes the
Data option to Symb.
Use the ◄ ►arrow keys to select TxSymbolRate, Data Invert, or Clock Invert, and then press
ENTER.
On the top line – To edit the Tx Symbol Rate, use the ◄ ►arrow keys to first select the digit to
edit, and then use the ▲▼ arrow keys to change that digit. Press ENTER when done.
On the bottom line – To edit the Data Invert or Clock Invert: For either, use the ▲▼ arrow keys
to select On or Off, and then press ENTER.
5–19
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.3.8 CONFIG: Tx  Scrambler
Tx Scrambler = IESS (Normal,IESS,Off)
IESS-315 V.35 Scrambler
()
Use the ▲▼ arrow keys to select Normal, IESS, or Off, and then press ENTER.
The modem automatically selects the actual scrambler used for Normal, depending on the exact
operating mode:
•
If framing = IBS/D&I, the IESS-309 scrambler is used.
•
If Reed-Solomon is on but IBS/D&I is off, its frame synchronous scrambler is used per IESS310, App. H. An exception to this is legacy EF Data Reed-Solomon, which uses a proprietary
modified V.35 scrambler instead.
•
If framing = EDMAC/2/3 and Reed-Solomon is off, its frame synchronous scrambler is used.
•
If configured for TPC (Turbo) encoding and all of the above settings are off, the TPC frame
scrambler is used except for 8-QAM.
For CDM-570 compatibility, TPC with 8-QAM uses the V.35 scrambler.
•
ITU V.35 scrambler (Intelsat variant) is the default scrambler when all of the above settings
are off.
When selecting IESS, the default ITU V.35 scrambler specified in IESS-315 takes priority over all
“normal” scramblers and is used instead. Therefore, for many operating modes, the two
scrambler choices are redundant.
When using TPC and Carrier-in-Carrier simultaneously, the IESS-315 (V.35) scrambler is the only
permitted choice.
5–20
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.1.4
Revision 15
MN-CDM625
CONFIG: Rx
RxIF Freq FEC Demod Data Descram Eq EbNo
(Data 02048.000kbps,02184.533ksps) ()
On the top line – Use the ◄ ►arrow keys to select RxIF, Freq, FEC, Demod, Data (Symb when in
IP-ACM Mode), Descram, Eq, or EbNo, and then press ENTER.
On the bottom line – Read-only Data/Symbol rate information is provided.
When Sub-Mux is ON, the Data Rate information on the bottom line of this display
is replaced by Composite Rate information.
5.2.1.4.1 CONFIG: Rx  Rx-IF
Acquisition Sweep Range = +/- 032 kHz
Spectrum Invert=Off (Off,On)
()
Use the ◄ ►arrow keys to select Acquisition Sweep Range or Spectrum Invert (available
options are shown in parentheses).
The Acquisition Sweep Range value determines the amount of frequency uncertainty the
demodulator will sweep over in order to find and lock to an incoming carrier. When operating at
low bit rates, large values of sweep range (compared to the data rate) cause excessively long
acquisition times. For example, when selecting ±32 kHz with a data rate of 2.4 kbps, BPSK will
result in an average acquisition time of around 3 minutes.
Use the ▲▼ arrow keys to edit the setting in 10 kHz increments, and then press ENTER. The Rx
symbol rate determines the Sweep Range limits:
Rx Symbol Rate
Sweep Range Limit
±1 to symbol rate / 2 (ksps)
18 - 64 kbps
±1 to 32 kHz
64 - 389 ksps
±1 to (10% of symbol rate)
389 - 2000 ksps
±1 to 200 kHz
>2000ksps
Use the ▲▼ arrow keys to set Spectrum Invert as Off or On, and then press ENTER.
SPECTRUM INVERT should normally be in the OFF position. When in the ON
position, the Rx spectrum is inverted (which is the same as reversing the direction
of phase rotation in the demodulator). When in BPSK mode, note that the
demodulator will automatically synchronize to either the normal time-ordering of
bits FEC codeword pairs, or the inverted ordering used by certain other
manufacturers.
5–21
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.4.2 CONFIG: Rx Freq (Frequency)
Rx-IF Frequency:
0050.0000 MHz
()
To edit the Rx Frequency, use the ◄ ►arrow keys to select a digit to edit, and then use the ▲▼
arrow keys to change that digit. The available frequency ranges are 50-180 MHz, and 950-2000
MHz (L-Band) (FAST option). Press ENTER when done.
When you use the ODU menus to configure a LNB LO-frequency, this screen displays a second
line of information (this example uses low-sided mix):
Rx-IF Frequency:
1200.0000 MHz
(LO:12500 MHz Sat:13700.0000 MHz) ()
The Satellite frequency updates accordingly as the IF frequency is edited.
Satellite frequency = LO ± IF frequency, where the sign is determined
by the LO mix parameter:
• High-sided mix [–] (includes a spectral inversion);
• Low-sided mix [+].
5.2.1.4.3 CONFIG: Rx  FEC
Dec=Vit (Vit,Seq,TCM,TPC,LDPC,VFEC,ULL)
Reed-Solomon=Off (Off,On)
()
Use the ◄ ►arrow keys to select Decoder or Reed-Solomon / Diff Encoder, and then press
ENTER.
On the top line –Use the ▲▼ arrow keys to select an available Decoder option (shown in
parentheses), and then press ENTER. The choices are:
► None (i.e., uncoded)
► Vit (Viterbi)
► Seq (Sequential)
► TCM (Trellis Coded Modulation)
8-PSK Rate 2/3 only (FAST option)
► TPC (Turbo)
(Hardware option)
► LDPC (Low Density Parity
Check) (Hardware option)
► VFEC
(VersaFEC Hardware option)
► ULL (Ultra-Low Latency)
(VersaFEC Hardware option)
1. If selecting None for the Encoder setting, the bottom line of the screen
changes from Reed-Solomon to Diff Encoder (Differential Encoding).
2. The TPC (Turbo) and LDPC encoding selections display only when the optional
5–22
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
TPC/LDPC Codec is installed.
3. The VFEC and ULL encoding selections display only when the optional
VersaFEC Codec is installed.
On the bottom line – When Reed-Solomon is selectable, use the ▲▼ arrow keys to select On or
Off, and then press ENTER.
CONFIG: Rx  FEC  Reed-Solomon On
Reed-Solomon Decoding =IESS-310(219/201)
(Standard(126/110),IESS-310(219/201)) ()
Use the ▲▼ arrow keys to select an available parameter, and then press ENTER. Depending on
the Framing mode, possible selections are as follows:
► IESS-310, open or closed network
219/201
► IBS or D&I
126/112
► EDMAC or EDMAC2, closed network
200/180
► IDR, open network
225/205, 219/201 or 194/178
► ESC++ or D&I++, closed network
126/112
► Unframed closed network:
○ Comtech standard
○ Legacy EF Data
220/200
225/205, with V.35 scrambling
Otherwise, when Diff Encoder is selectable, use the ▲▼ arrow keys to select On or Off, and
then press ENTER.
CONFIG: Rx  FEC  Diff Encoder On
When selecting Differential Decoding as OFF, there is no way for the modem to
resolve the phase ambiguities associated with PSK modulations. For BPSK there is a
1 in 2 chance that the polarity of the data will be correct. In QPSK there is a 1 in 4
chance that the data will be correct.
Enc=None (None,Vit,Seq,TCM,TPC,LDPC,VFEC)
Diff Encoder=On (Off,On)
()
5–23
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.4.4 CONFIG: Rx  Demod (Demodulation)
Demod=QPSK (B,Q,OQ,8PSK,16QAM)
FEC Rate=1/2 (1/2,3/4,7/8)
()
Use the ◄ ►arrow keys to select Demod (top line) or FEC Rate (bottom line), and then press
ENTER. Then, for either, use the ▲▼ arrow keys to select the setting. The Decoder type dictates
the FEC Rate choices:
Decoder Type
Modulation Type
FEC Rate Choice
No Encoder
BPSK
QPSK, OQPSK
Fixed at 1/1
Fixed at 1/1
Non-Turbo Encoder
BPSK
TCM 8-PSK (FAST option)
QPSK, OQPSK
16-QAM (Vit+RS only)
Fixed at Rate 1/2
Fixed at Rate 2/3
1/2, 3/4, 7/8
3/4, 7/8
TPC
(with TPC/LDPC Codec installed)
BPSK
QPSK, OQPSK
8-PSK (FAST option)
16-QAM (FAST option)
5/16, 21/44
1/2, 3/4, 7/8, 0.95
3/4, 7/8, 0.95
3/4, 7/8
LDPC
(with TPC/LDPC Codec installed)
BPSK
QPSK, OQPSK
8-PSK, 8-QAM (FAST)
16-QAM (FAST option)
Fixed at 1/2
1/2, ¾, 7/8
2/3, 3/4
Fixed at 3/4
VFEC
(with VersaFEC Codec installed)
BPSK
QPSK
8-QAM (FAST option)
16-QAM (FAST option)
Fixed at 0.488
0.533, 0.631, 0.706, 0.803
0.576, 0.642, 0.711, 0.780
0.644, 0.731, 0.780, 0.829, 0.853
ULL (Ultra-Low Latency)
(with VersaFEC Codec installed)
BPSK
QPSK
Fixed at 0.493
0.493, 0.654, 0.734
If selecting TPC from the FEC menu with TPC/LDPC Codec installed, the options appear as
shown:
Demod=QPSK (B,Q OQ,8PSK,16Q,8QAM)
FEC Rate=1/2 (1/2,3/4,7/8)
()
If selecting VFEC from the FEC menu with VersaFEC Codec installed, the options appear as
shown:
Demod=BPSK (B,Q,8QAM,16QAM)
FEC Rate=0.488 (Fixed)
5–24
()
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
If selecting ULL from the FEC menu with VersaFEC Codec installed, the options appear as shown:
Demod=BPSK (B,Q)
FEC Rate=0.493 (Fixed)
()
5.2.1.4.5 CONFIG: Rx  Data
Rx Data Rate
Rx Sub-Mux
()
Use the ◄ ►arrow keys to select Rx Data Rate or Rx Sub-Mux, and then press ENTER.
If Rx Sub-Mux is ON, this menu provides read-only IP Info Rate information on the bottom line,
as shown:
Rx Data Rate
Rx Sub-Mux
(IP Info Rate: 01200.340 kbps)
()
CONFIG: Rx  Data  Rx Data Rate
Rx Data Rate = 01544.000 kbps
Data Invert=Off Clock Invert=Off
()
Use the top line to edit the Rx Data Rate. The bottom line permits selection of the Data
Inversion or the Clock Inversion features (added for compatibility with certain older equipment).
On the top line – To edit the Rx Data Rate, use the ◄ ►arrow keys to select a digit to edit, and
then use the ▲▼ arrow keys to change that digit. Press ENTER when done.
The maximum limits for the Rx Data Rate are 18kbps to 25Mbps. The actual minimum and
maximum data rates are dependent on Framing mode, Interface type, Modulation type and FEC
Code Rate. If you change any of the higher-priority parameters – causing the data rate to
become invalid – the Data Rate adjusts automatically. The installed FAST option(s) also dictate
the upper range of data rate.
When configuring for D&I or IDR framing or for G.703 interface type, the ▲▼ arrow keys scroll
through only the available data rates. If you edit the data rate to 1920 kbps while in D&I
framing, a message appears to indicate that E1 Fixed Channel Mode is implemented.
When G.703 is used, three auxiliary rates – 512, 1024, and 2048 kbps – are available as indicated
by the word AUX appearing to the right of the decimal place (for example, 00512.AUX
kbps).
5–25
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
AUX G.703 Data Rate Connectors Reference: Sect. 3.3.2.5 G.703 IDI (Insert Data In),
DDO (Drop Data Out) Connectors in Chapter 3. REAR PANEL CONNECTORS AND
PINOUTS.
Note that, in QDI (Quad D&I) mode, these data rates are read-only! The data rate is the sum of
the tributary rates for all ports, and you must the data rate via the QDI menu.
On the bottom line – To edit the Data Invert or Clock Invert operation: For either, use the ▲ ▼
arrow keys to select On or Off, and then press ENTER.
CONFIG: Rx  Rx Data  Rx Sub-Mux
Rx Sub-Mux = Off (Off, On)
Ratio = 1/9 (IP/Synchronous)
()
Use the ▲▼ arrow keys to select the desired ratio, and then press ENTER. There are a total of
34 ratio options available:
► 1/59
► 2/7
► 1/1
► 7/2
► 1/39
► 1/3
► 5/4
► 4/1
► 1/19
► 2/5
► 4/3
► 5/1
► 1/9
► 3/7
► 3/2
► 6/1
► 1/8
► 1/2
► 5/3
► 7/1
► 1/7
► 3/5
► 2/1
► 8/1
► 1/6
► 2/3
► 7/3
► 9/1
► 1/5
► 3/4
► 5/2
► 1/4
► 4/5
► 3/1
5.2.1.4.6 CONFIG: Rx  Symb (IP-ACM Mode Only)
Chapter 17. ADAPTIVE CODING AND MODULATION (ACM)
VersaFEC ACM requires the correct hardware module (PL-0000264) to be installed
in the unit, Version 1.4.0 (or higher) firmware, and the appropriate FAST code for
the maximum operating symbol rate.
RxSymbolRate = 01000.000 ksps (ACM Mode)
Data Invert=Off Clock Invert=Off ()
Note that the use of IP-ACM is a fundamental departure from the way you would typically
configure the modem. When IP-ACM mode is active, the CONFIG: Rx menu changes the Data
option to Symb.
On the top line – To edit the Rx Symbol Rate, use the ◄ ►arrow keys to select a digit to edit,
and then use the ▲▼ arrow keys to change that digit. Press ENTER when done. Note that
asymmetric operation is supported – transmit and receive symbol rates do not have to be equal.
On the bottom line – To set the Data Invert or Clock Invert operation: For either, use the ▲▼
arrow keys to select On or Off, and then press ENTER.
5–26
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.4.7 CONFIG: Rx  Descram (Descrambler)
Rx Descrambler = IESS (Normal,IESS,Off)
IESS-315 V.35 Scrambler
()
Use the ▲▼ arrow keys to select Normal, IESS, or Off, and then press ENTER.
The modem automatically selects the actual scrambler used for Normal, depending on the exact
operating mode:
•
If framing = IBS/D&I, the IESS-309 scrambler is used.
•
If Reed-Solomon is on but IBS/D&I is off, its frame synchronous scrambler is used per IESS310, App. H. An exception to this is legacy EF Data Reed-Solomon, which uses a proprietary
modified V.35 scrambler instead.
•
If framing = EDMAC/2/3 and Reed-Solomon is off, its frame synchronous scrambler is used.
•
If configured for TPC (Turbo) encoding and all of the above settings are off, the TPC frame
scrambler is used except for 8-QAM. For CDM-570 compatibility, TPC with 8-QAM uses the
V.35 scrambler.
•
ITU V.35 scrambler (Intelsat variant) is the default scrambler when all of the above settings
are off.
When selecting IESS, the default ITU V.35 scrambler specified in IESS-315 takes priority over all
“normal” scramblers and is used instead. Therefore, for many operating modes, the two
scrambler choices are redundant.
When using TPC and Carrier-in-Carrier simultaneously, the IESS-315 (V.35) scrambler is the only
permitted choice.
5.2.1.4.8 CONFIG: Rx  Eq (Equalizer)
Rx Equalizer:
Disabled
(Enable,Disable)
()
Use the ▲▼ arrow keys to select Enable or Disable, and then press ENTER. The integrated 5-tap
adaptive equalizer can compensate for:
•
Amplitude slope and variation over the symbol bandwidth.
•
Non-linear group delay variation over the symbol bandwidth.
It is particularly useful at higher symbol rates (up to 12.5 Msymbols/second) in situations with
long cable runs between equipment (downconverter and modem, for example).
5–27
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
The Eb/No estimate is performed after the adaptive equalizer block, which provides an easy way
to determine if the equalizer is providing any benefit. If the equalizer is first turned off, the
Eb/No may be viewed on the monitor screen. The equalizer is then turned on, and the Eb/No
viewed on the monitor screen to determine any improvement.
5.2.1.4.9 CONFIG: Rx  EbNo
Receive EbNo Alarm Point = 02.0 dB
()
To edit the EbNo Alarm Point, use the ◄ ►arrow keys to select a digit to edit, and then use the
▲▼ arrow keys to change that digit. The permitted range is from 00.1 to 16.0 dB. Press ENTER
when done.
If the Rx Eb/No falls below this value and the fault is NOT masked, a receive traffic
fault will be generated.
5–28
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.1.5
Revision 15
MN-CDM625
CONFIG: Clocks
Clocking:
Clock-Ext
TxClock
Freq-Ref
RxBuffer/Clock
Int-Ref-Adjust ()
Use the ◄ ►arrow keys to select TxClock, RxBuffer/Clock, Clock-Ext, Freq-Ref, or Int-RefAdjust, and then press ENTER.
5.2.1.5.1 CONFIG: Clocks  Tx Clock
Transmit Clock = Internal(SCT)
(Int(SCT),TxTerr(TT),RxLoop, ETTSTRxS) ()
Use the ▲▼ arrow keys to select from the choices shown in parentheses, and then press
ENTER. Note the following:
Selection
Function
Internal (SCT)
This is the required setting when the Tx interface type is Audio. Indicates that the unit
will supply a clock to the DTE, which is derived from its internal high-stability source.
Tx-Terrestrial (TT)
This is the required setting when the modem’s interface type is G.703. Indicates that
the unit expects to receive a clock from the DTE, to which the unit can phase-lock its
internal circuits. If no clock is detected the modem will substitute its internal clock and
generate an alarm.
Rx-Loop-timed
Allows the modem’s internal clock to be phas e locked to the Rx buffer clock source.
This output clock is Send Timing. Choosing Rx-Loop does not automatically select RxSat as t he buf fer c lock s ource. This al lows f or i ncreased f lexibility f or m odem c lock
selection. While you typically should select Rx-Sat, other choices are also available.
Example: You have an av ailable hi gh s tability 10 M Hz c lock s ource, but t he end
equipment only accepts a clock at the information data rate. Selecting Tx Clock = RxLoop and Rx Buffer Clock = EXT-REF provides receive timing and send timing to the
end equipment that is sourced from the 10 MHz reference.
Ext-TT (ST = Rx Sat)
Only valid if: RS422, V.35, HSSI or LVDS, Tx and Rx data rates are equal, no RS, and
no framing.
This m ode is a vailable to per mit a par ticular v ariation of Loop T iming. In t his m ode,
transmit timing is taken from the TT pins, but ST is active and gives out a copy of the
Rx Satellite Clock.
Sect. 9.1.1 CLOCK MODES AND DROP & INSERT (D&I).
5–29
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.5.2 CONFIG: Clocks  Rx Buffer/Clock
Clk=Rx-Sat (Rx-Sat,TxTerr,Int(SCT),Ins)
Buffer-Size = 00016bytes(00002ms) Center
Use the ◄ ►arrow keys to set the Rx Clock (top line) or the Buffer-Size (bottom line).
On the top line – To set the Rx Clock, use the ▲▼ arrow keys to select Rx-Sat, Tx-Terr, Int
(SCT), or Ins, and then press ENTER. Note the following:
Selection
Function
Rx-Sat
Sets the Receive buffer clock source to the satellite clock (the receive buffer is bypassed).
Note: This will fix the buffer size to minimum.
Tx-Terr
In this timing mode, data is clocked out of the receive buffer using the external transmit clock.
Int(SCT)
Data is clocked out of the buffer using the same reference that drives the modem Internal(SCT).
Ins(ert)
Available only if Rx framing is D&I and Rx interface is G.703. Sets the buffer clock to the Insert
stream.
On the bottom line – To set the Buffer-Size, use the ◄ ►arrow keys to select a digit to edit, and
then use the ▲▼ arrow keys to change that digit. Press ENTER when done.
Buffer Size indicates the size in bytes (and size in milliseconds) of the Plesiochronous
/ Doppler Buffer. The minimum buffer size and step size are usually the same, and
are dictated by the following rules:
If Framing is D&I or D&I++:
Otherwise:
If D&I Type is:
If data rate is:
Step size (bytes)
Step size (bytes)
E1 D&I @ 1920kbps
1024
1544 kbps (T1)
1158
T1-D4
24 x n or 3ms
2048 kbps (E1)
1024
T1-ESF
48 x n or 6ms
6312 kbps (T2)
1578
E1
32 x n or 4ms
8448 kbps (E2)
528
Otherwise
2, with minimum size of 16 bytes
CONFIG: Clocks  Rx Buffer/Clock  Center
Selecting Center displays the following screen:
Press ENTER to Center the Buffer
otherwise, press CLEAR
Press ENTER or CLEAR as instructed.
5–30
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.5.3 CONFIG: Clocks  Clk-Ext (G.703 Clock Extension)
Sect. 9.1.1 CLOCK MODES AND DROP & INSERT (D&I).
G.703 Clock Extension:
Mode
Interface
()
Use the ◄ ►arrow keys to select Mode or Interface, and then press ENTER.
CONFIG: Clocks  Clk-Ext  Mode
G.703 Clock Extension Mode: RxEnable
(None, TxLock, RxEnable)
()
Use the ▲▼ arrow keys to select None, TxLock, or RxEnable, and then press ENTER. Note the
following:
Selection
Function
None
All G.703 Clock extension modes are disabled.
TxLock
The unit (operating i n a non -G.703 m ode) l ocks i ts t ransmit c lock t iming t o an ex ternally
presented G.703 reference signal.
RxEnable
The unit (operating in a non -G.703 mode) synthesizes a G .703 timing reference from the Rx
satellite signal, regardless of its actual data rate.
CONFIG: Clocks  Clk-Ext  Interface
G.703 Clock Extension:
Interface: T1
(T1, E1-B, E1-U)
()
When selecting TxLock as the mode, the transmit timing of the unit locks to the timing
presented of the interface type selected here.
When selecting RxEnable as the mode, the unit generates a timing signal of the interface type
selected here.
The two interface types do not need to be the same for a particular link. For
example, if it is required to generate an E1 reference signal at the remote site, but
at the local end only a T1 reference signal is available, this is supported.
5–31
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.5.4 CONFIG: Clocks  Freq-Ref
Frequency Reference: Internal
(Internal(with O/P),1,2,5,10MHz)
()
Use the ▲▼ arrow keys to select one of the two internal reference modes – Internal and
Internal (with Output) – and then press ENTER.
Internal (with Output) mode uses the internal reference as an output on the rear panel Ext Ref
In/Out BNC connector. This mode is useful if a user wishes to use a single frequency reference
for both the modem and another piece of equipment in the system. When selecting this mode,
an amber LED adjacent to the connector illuminates to alert you that the connector, normally
used as input, now has an output signal present.
5.2.1.5.5 CONFIG: Clocks  Int-Ref-Adjust
Internal Hi-Stability 10MHz Reference
Fine Adjust: +048 (+/-999)
()
Very fine adjustment of the Internal 10MHz Reference is possible when selecting the Internal 10
MHz Reference. The adjustment value is retained in EEPROM memory, and is therefore not lost
when the NVram memory is cleared.
Use the ◄ ►arrow keys to select a digit to edit, and then use the ▲▼ arrow keys to change that
digit. Press ENTER when done.
Changes made to the adjust value are executed immediately upon entry, not after
pressing the ENTER key.
5–32
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.1.6
Revision 15
MN-CDM625
CONFIG: D&I (Drop & Insert)
Chapter 9. CLOCK MODES AND DROP & INSERT (D&I).
1. Drop & Insert operation is a FAST option.
2. D&I (Drop & Insert) is not available when IP-ACM mode is selected.
If D&I has not been selected, this menu displays as shown:
Drp-Type= N/A
Ins-Type= N/A
Chan/TS
Chan/TS
Loop=Y (Y/N)
()
If you configure the modem for Quad Drop and Insert (QDI), then a different menu displays –
see Sect. 5.2.1.6.4.
For one-port D&I, the menu displays as shown:
Drp-Type= T1-D4
Ins-Type= T1-D4
Chan/TS
Chan/TS
Loop=Y (Y/N)
()
On the top line – Use the ◄ ►arrow keys to select the Drp-Type (Drop-Type); its Chan/TS
(Channel Timeslot); or the Loop.
On the bottom line – Select the Ins-Type (Insert-Type) or its Chan/TS (Channel Timeslot).
For any of these selections, press ENTER to continue on to that selection’s submenu branch, and
then use the ▲▼ arrow keys to individually edit those parameters.
5.2.1.6.1 CONFIG: D&I  Loop
Selecting Loop ties Drop Data Out (DDO) to Insert Data Input (IDI) without having to externally
connect cables to these ports. Use the ▲▼ arrow keys to select Y(es) or N(o) for the Loop
feature.
5.2.1.6.2 CONFIG: D&I  Drp-Type or Ins-Type
The Drop-Types and Insert-Types are:
► T1- D4
► T1 – ESF
► E1 – CCS
► E1 – CAS
Use the ▲▼ arrow keys to select the desired Drop-Type and Insert-Type. To edit the Channel
Timeslots (Chan/TS) for either Drop or Insert, press ENTER to display the screens featured in the
next sections.
5–33
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.6.3 CONFIG: D&I  (Drop or Insert) Chan/TS (Channel Timeslots)
Drp-Ch: 1
TS: 01
2
02
3
03
4
04
Ins-Ch: 1
TS: 01
2
02
3
03
4
04
5
na
For the Drop-Type or Insert-Type Channel Timeslots, use the ◄ ►arrow keys to select the
Channel to edit, and then use the ▲▼ arrow keys to edit that timeslot’s value. Press ENTER
when done.
The number of available Channels depends on the data rate:
• If the data rate is 1920 kbps and the framing is D&I, then only the E1 formats are available
and the Chan/TS menus are disabled. This is the ‘Fixed Channel Mode’ where all timeslots
are allocated in order. D&I++ does not have ‘Fixed Channel Mode’.
• If the framing is D&I and Drop/Insert Type is E1-CAS, Timeslot 16 is used solely for CAS
signaling and therefore may not be allocated for traffic data.
5.2.1.6.4 CONFIG: Quad D&I (QDI)
Quad D&I (QDI):
Drop
Insert
()
Use the ◄ ►arrow keys to select Drop or Insert, and then press ENTER.
CONFIG: Quad D&I (QDI)  Drop or Insert
QDI Port[ch]: Drop:
1[09] 2[15]
3[00]
01536 kbps
4[00]
()
QDI Port[ch]: Insert:
1[09] 2[15]
3[00]
01536 kbps
4[00]
()
The Drop or Insert submenus show information for all four ports of the Drop or Insert sides, and
the cumulative Tx or Rx data rates.
Typical for either submenu:
Each port may be allocated between 0 and 32 channels, accumulating to no less than one
channel and no more than 32 channels.
5–34
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Use the ◄ ►arrow keys to select the port to edit, and then use the ▲▼ arrow keys to edit the
number of channels for that port. The cumulative data rate calculates and displays as you edit
the number of channels.
After pressing ENTER, a submenu appears based on the port that the cursor had been on (where
#X is the tributary port number):
QDI Drp-Ch: 1 2 3 4 5 6 7 8
Port#X TS: 01 02 03 04 11 12 13 14
>
QDI Ins-Ch: 1 2 3 4 5 6 7 8
Port#X TS: 01 02 03 04 11 12 13 14
>
Each display can only show up to eight channels. A > character displays at the top right-hand
side of either screen to indicate that there are more channels to view beyond Channel 8 (as
shown in the preceding examples). Use the ►arrow key to scroll further to more channels.
Use the ◄ ►arrow keys to select a timeslot, and then use the ▲▼ arrow keys to edit that
timeslot value. Press ENTER when done.
5–35
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.1.7
Revision 15
MN-CDM625
CONFIG: A CM ( Adaptive Coding and M odulation) ( IP-ACM M ode
Only)
Chapter 17. ADAPTIVE CODING AND MODULATION (ACM)
ACM Config: Min/Max-ModCod
Target-EbNo-Margin
Unlock-Action
()
Use the ◄ ►arrow keys to select Min/Max-ModCod, Unlock-Action, or Target-EbNo-Margin,
and then press ENTER.
5.2.1.7.1 CONFIG: ACM  Min/Max-ModCod
Min Modcod: 00 (B
Max Modcod: 00 (B
0.488 0.488 bps/Hz)
0.488 0.488 bps/Hz)
Use the ◄ ►arrow keys to select the Min(imum) or Max(imum) ModCod range setting. Then,
use the ▲▼ arrow keys to define the range of ModCods (00 through 11) over which the system
will operate. Press ENTER when done.
ModCod 00 is BPSK Rate 0.488 (0.49 bps/Hz), while ModCod 11 is 16-QAM Rate 0.853
(3.41bps/Hz).
If you wishes to constrain the system to run at a fixed ModCod, set the Min and
Max ModCod values to be equal.
The value of Max ModCod may be limited by other FAST codes installed. For
example, suppose the 4100 ksps FAST option is installed, and the symbol rate set
to 4100 ksps, the theoretical maximum data rate would be 14 Mbps at ModCod
11. However, if CnC is being used, with a 10 Mbps FAST limit the ACM Max
ModCod will be limited to ModCod 7, or 9.6 Mbps.
5.2.1.7.2 CONFIG: ACM  Unlock-Action
When distant-end demod loses lock:
Go to min Tx ModCod (Maintain,Min)
()
Use this submenu to establish the desired action when the remote demod loses lock. This is
important, as the ACM system depends on the feedback of the SNR metric from the remote
demod to determine the optimum ModCod. Use the ▲▼ arrow keys to select Go to min Tx
ModCod (recommended) or Maintain Tx ModCod, and then press ENTER.
5–36
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.7.3 CONFIG: ACM  Target-EbNo-Margin
Target Eb/No Margin = 1.0 dB (0.0 – 4.5)
()
Use the ▲▼ arrow keys to select a margin value from 0.0 to 4.5 dB, in 0.5 dB increments. Press
ENTER when done.
The ACM system is designed to switch based on thresholds that correspond to a
BER of 5 x 10-8 for each ModCod. However, in order to prevent oscillation around
two ModCods at this exact value, 0.3 dB of hysteresis has been added.
5.2.1.8
CONFIG: CnC
CnC operation requires installation of the DoubleTalk Carrier-in-Carrier module. In
addition to installing the CnC module, you needs to purchase one of several
available FAST options to provide capability to a maximum of 25Mbps.
1. Chapter 10. DoubleTalk Carrier-in-Carrier OPTION
2. For more information about purchasing FAST options:
• Sect. 5.2.8 SELECT: FAST menus
• Sect. 1.3.10 Fully Accessible System Topology (FAST)
• Appendix C. FAST ACTIVATION PROCEDURE
Carrier in Carrier:
Mode
Freq-Offset
Search-Delay
PMSI-control
()
Use the ◄ ►arrow keys to select Mode, Freq-Offset, Search-Delay, or PMSI-control, and then
press ENTER.
5.2.1.8.1 CONFIG: CnC  Mode
See Sect. 10.6 Carrier-in-Carrier Automatic Power Control (CnC-APC) in Chapter 10.
DoubleTalk Carrier-in-Carrier OPTION for complete details about, and setup of, the
CnC-APC feature.
CnC Mode: APC,Side A,C-band (Off, On, APC)
Activate? N(Y,N) APC is not active ()
On the top line – Use the ▲▼ arrow keys to select the appropriate CnC operating mode.
Available selections are:
• Off
• On (normal)
• APC,Side A,C-band
• APC,Side A,X-band
• APC,Side A,Ku-band
• APC,Side A,Ka-band
5–37
CDM-625 Advanced Satellite Modem
Front Panel Operation
• APC,Side B,C-band
Revision 15
MN-CDM625
• APC,Side B,X-band
• APC,Side B,Ku-band
• APC,Side B,Ka-band
With no CnC module (card) installed, CnC Mode is ‘Off’, this menu is inaccessible, and the
CONFIG: CnC → Mode screen appears as shown:
CnC Mode:
Off (Off, On, APC)
Card not installed
()
5.2.1.8.2 CONFIG: CnC  CONFIG: CnC  Freq-Offset
CnC Frequency Offset:
(range 1-032)
+/-015 kHz
()
Use this menu to enter the maximum expected frequency offset between the outbound
interferer and the desired inbound. It normally corresponds to the demod acquisition range.
Use the ▲▼ arrow keys to edit the CnC Frequency Offset value, and then press ENTER. The
upper limit of Frequency Offset is determined by the Rx symbol rate:
•
Below 64 ksymbols/sec: ±1 to ±(Rs/2) kHz, where:
Rs=symbol rate in ksymbols/sec
•
Between 64 and 389 ksymbols/sec: ± 1 up to a maximum of ± 32kHz
•
Above 389 ksymbols/sec: ±1 to ± (0.1Rs) kHz, up to a maximum of ± 200 kHz
This range is pre-calculated and displayed in parentheses for reference.
5.2.1.8.3 CONFIG: CnC  Search-Delay
CnC Search Delay:
(range 0-330ms)
Min: 010 ms
Max: 290 ms
()
To reduce the time taken for the CnC algorithm to converge, you may apply restrictions to the
range of delay used by the search. During initial link testing, it should be set to 240 ms (min) and
300 ms (max). Once CnC has found the exact delay, the value can be further reduced but care
should be taken to allow sufficient range to accommodate changes in path delay due to
Doppler.
If CnC is being bench-tested with two units in a back-to-back configuration, the
minimum delay should be set to 0 ms, and the maximum to 20 ms. This takes into
account the lack of satellite delay.
5–38
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
To edit the Min or Max delay, use the ◄ ►arrow keys to select a digit to edit, and then use the
▲▼ arrow keys to change that digit. Press ENTER when done.
5.2.1.8.4 CONFIG: CnC  PMSI-Control
CnC PMSI Mode: Idle
(Idle, Redundancy, Talk, Listen)
()
The Pre-Mapped Symbol Interface (PMSI) is an RS-485 multi-drop bus system where one device
transmits and all other devices on the multi-drop bus are configured to receive. Its function, as
associated with DoubleTalk Carrier-in-Carrier, permits the modulator in a selected unit to
provide a direct copy of its output (the outbound interferer) to one or many other modems. The
other modem(s) may then choose to take the PMSI signal and use it for its own CnC reference.
This applies to 1:1 and 1:N systems, and to certain other configurations.
In order to use this mode of operation, you must connect the appropriate cable to the PMSI
connector on the rear panel of each modem:
•
For 1:N multi-drop applications – Use Comtech EF Data cable P/N CA-0000275;
•
For 1:1 applications – Use Comtech EF Data cable P/N CA-0000276.
Contact Comtech EF Data Customer Service for further details about either cable.
Use the ▲▼ arrow keys to select the desired PMSI control configuration, and then press ENTER.
Note the following:
Selection
Function
Idle
Select when CnC is not used.
Redundancy
Select when CnC is used in a 1:1 or 1:N redundancy applications.
Talk
Select w hen C nC i s us ed i n o ther c onfigurations, or f or m anual t esting ( the m odem w ill
transmit a copy of its baseband modulated signal on the PMSI port).
Listen
Select when CnC is used in other configurations, or for manual testing (the modem will receive
the P MSI s ignal, and l ock its m odulator t o t his, per mitting t he C nC m odule t o us e t he ot her
modem’s reference outbound interferer).
5–39
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.1.9
Revision 15
MN-CDM625
CONFIG: EDMAC
Chapter 11. EDMAC CHANNEL
EDMAC Mode= Idle
(Idle,Master,Slave)
()
Embedded Distant-end Monitor And Control (EDMAC) is a Comtech-proprietary framing that
permits communication access to the distant-end modem. In order to edit the EDMAC mode,
the framing must be set for EDMAC, EDMAC-2, EDMAC-3, or D&I++.
EDMAC Mode= Master (Idle,Master,Slave)
EDMAC Address= 0020
()
Use the ▲▼ arrow keys to select the mode as Idle, Master, or Slave, and then press ENTER.
If the mode is Master or Slave, the bottom line shows an address. To edit the address, use the
◄ ►arrow keys to select a digit to edit, and then use the ▲▼ arrow keys to change that digit.
Press ENTER when done. Note the following:
•
An EDMAC Master is a modem that is local to the M&C computer, and which passes
messages, via the overhead, to a distant-end modem. The Master address always ends in
‘0’.
•
An EDMAC Slave is a modem that is not local to the M&C computer. It is at the ‘distant-end’
of a satellite link. The Slave EDMAC address always ends in ‘1’. When configured as a Slave,
reconfiguration is expected to be via the EDMAC link, and is therefore not permitted via the
front panel or via serial remote control.
5–40
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.10 CONFIG: Misc
Misc: G.703-LineCode IDR-ESC HSSI RTS
Audio-Vol HiRateESC WarmUp Stats MEO ()
Use the ◄ ►arrow keys to select G.703-LineCode, IDR-ESC, HSSI, RTS, Audio-Vol, HiRateESC,
WarmUp, Stats, or MEO and then press ENTER.
5.2.1.10.1 CONFIG: Misc  G.703-LineCode (Ternary Code)
Parameters are editable only when the Data Interface Type is G.703.
Tx G.703/DDO Code= AMI
Rx G.703/IDI Code= AMI
(AMI,B8ZS)
(AMI,B8ZS) ()
The choices displayed here depend on the selected G.703 interface type. Use the ◄ ►arrow
keys to select either the G.703 Tx or Rx Ternary Code, and then use the ▲▼ arrow keys to select
the desired code. Press ENTER when done. The available choices are as follows:
Selection
For:
HDB3
E1, E2 or sub-rate operation
B8ZS
T1 and Unbalanced T2 operation
B6ZS
Balanced T2 operation
AMI
5.2.1.10.2 CONFIG: Misc  IDR-ESC
Parameters are editable only when the Framing Mode is IDR.
IDR-ESC-Type Tx:64k Data
Rx:64k Data
(64kData,Audio)
()
Use this menu to determine if the 64 kbps channel in the IDR Engineering Service Channel (ESC)
overhead, normally reserved for the two 32 kbps ADPCM audio channels, should instead carry
user data. The rear panel Overhead connector provides the appropriate EIA-422 interface for
this option.
5–41
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Use the ◄ ►arrow keys to select the parameter to edit, and then use the ▲▼ arrow keys to
select its setting. Press ENTER when done.
5.2.1.10.3 CONFIG: Misc  HSSI
This control setting is applicable only when the Data Interface Type is HSSI.
HSSI handshake control:
TA-> CA loop
(2 options)
()
Use the ▲▼ arrow keys to select HSSI handshake control as TA -> CA loop, RR cntl CA, or TA
cntl Tx, and then press ENTER.
5.2.1.10.4 CONFIG: Misc  RTS
This control setting is effective only when the Data Interface is set for RS-422 or
V.35.
RTS/CTS operation:
(3 options)
Loop, RTS controls Tx-out
()
Use the ▲▼ arrow keys to set the RTS/CTS control, and then press ENTER. The available choices
are as follows:
Selection
Function
RTS/CTS Loop, No Action
RTS and CTS are looped so that CTS echoes the state of RTS, but RTS does
not control the ON/OFF state of the carrier.
Loop, RTS controls Tx out
RTS and C TS ar e l ooped s o t hat C TS ec hoes t he s tate of R TS, and R TS
controls the ON/OFF state of the carrier (i.e., the modem will not bring up its TX
carrier until RTS is asserted).
RxEnable
RTS is ignored and CTS is asserted unconditionally.
5.2.1.10.5 CONFIG: Misc  Audio-Vol (ADPCM Audio Volumes)
ADPCM
Tx1 = +0 dB
Volumes: Rx1 = +2 dB
Tx2 = -2 dB
Rx2 = -4 dB
()
Use this menu to adjust the gain (or volume) of the audio ESC circuits for both Transmit (Tx) and
Receive (Rx). Use the ◄ ►arrow keys to select the volume to edit, and then use the ▲▼ arrow
5–42
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
keys to change the value. The permitted range of the volumes is –6 dB to +8 dB, in 2 dB steps.
Press ENTER when done.
5.2.1.10.6 CONFIG: Misc  HiRateESC
High-Rate-ESC=Off (Off,On)
RS-232
2400 baud
DataParityStop=8N1
()
The ESC (Engineering Service Channel) is determined by the framing type (IBS, D&I, or ESC++)
selected under CONFIG: Mode. The High Rate IBS (Engineering Service Channel) requires the
Open Network FAST option. Both Tx and Rx Framing must be configured as IBS or D&I for this
feature to be enabled. When enabled, the lower of the Tx or Rx primary data rate limits the
maximum baud rate, in accordance with the following table:
Data Rate
64 kbps
≥ 128 kbps
≥ 256 kbps
≥ 384 kbps
≥ 512 kbps
≥ 768 kbps
≥ 1024 kbps
Max ESC Baud Rate
2400
4800
9600
14400
19200
28800
38400
Chapter 14. OPEN NETWORK OPERATIONS
ESC++ is available as standard. Both Tx and Rx framing must be set to ESC++. When enabled, the
lower of the Tx or Rx primary data rate limits the maximum baud rate, in accordance with the
following table:
Data Rate
≥ 64 kbps
≥ 128 kbps
≥ 192 kbps
≥ 256 kbps
≥ 384 kbps
≥ 512 kbps
Max ESC++ Baud Rate
4800
9600
14400
19200
28800
38400
Chapter 12. ESC++
Use the ◄ ►arrow keys to select the parameter to edit, and then use the ▲▼ arrow keys to
select its setting. The available choices are as follows:
5–43
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
► High-Rate-Esc operation as On or Off.
► RS-232 or RS-485.
► Baud rate (range depends on other configuration parameters, previously noted).
► Character format (number of data bits, parity, number of stop bits): 8N1 (8-None-1), 7E2
(7-Even-2) or 7O2 (7-Odd-2).
Press ENTER when done.
5.2.1.10.7 CONFIG: Misc  Warm-Up
High-Stab Reference Warm-Up Delay:
Enabled
(None,Enable)
()
The High-Stability Reference Module contains an oven for its crystal. During the short time it
takes for the oven and crystal to come up to temperature, frequency accuracy is not
guaranteed.
Use this menu to select a Warm-up Delay that executes upon power-up. This delay is calculated
by the modem and is based on temperature and the amount of time the unit was turned off.
This is much more important at L-Band (950-2000 MHz) than at 50-180 MHz, where the 10 MHz
reference may also be used for RF conversion equipment.
Once this feature is enabled and the modem is powered up, a Warm-Up Delay Countdown is
activated during which time the Tx is suppressed. This countdown displays in decremented
fashion as shown in this example:
Comtech CDM-625 Advanced Satellite Modem
High-Stability Ref warming up: 045 sec
Press the CLEAR key to bypass this warm-up period as needed.
5.2.1.10.8 CONFIG: Misc  Stats (Statistics)
Link Statistics Logging Interval:
10 minutes (00 to 90)
()
The Logging Interval is the period over which performance statistics are to be measured. Use the
▲▼ arrow keys either to set this interval as 00 to disable the feature (i.e., no logging), or to
select a logging interval, in 10-minute increments, from 10 through 90 minutes. Press ENTER
when done.
5–44
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
To view compiled Statistic logs, access the ‘SELECT: Monitor  Statistics’ menu (see Sect.
5.2.2.8 for detailed information about viewing compiled Statistics data).
5.2.1.10.9 CONFIG: Misc  MEO
MEO is non-functional when the optional CnC card is installed.
CDM-625 Advanced Satellite Modems are configurable for continuous pairing as Primary and
non-Primary Modems in an Antenna Handover System when the MEO (Medium Earth Orbit)
feature is enabled.
Ethernet data traffic is transmitted and received via the Primary and Non-Primary CDM-625’s
four 10/100 Ethernet ports. The Antenna Handover signal received from the user-provided IF/RF
switch determines which modem is the ONLINE or OFFLINE unit:
•
The ONLINE unit transmits traffic only to the WAN side while, at the same time, the OFFLINE
unit’s Tx is muted.
•
Both the ONLINE and OFFLINE units receive the satellite traffic, but only the ONLINE unit
forwards traffic to the LAN side while the OFFLINE unit drops the packets.
•
Any time a unit switches from the OFFLINE to ONLINE state, the traffic destined for the WAN
is buffered, preconfigured in milliseconds (base modem → Antenna Handover delay).
With MEO disabled, the CONFIG: Misc  MEO screen appears as follows:
MEO: Feature
Press ENTER to access the MEO feature activation screen:
MEO Feature: Disabled (Enabled, Disabled)

Use the ▲▼ arrow keys to select the MEO feature as Disabled or Enabled, and then press
ENTER. Once the MEO feature is enabled, you are returned back to the MEO screen, only now
the Antenna Handover function is visible and available for selection:
MEO: Feature
Antenna Handover
()
Use the ◄ ►arrow keys to select Feature or Antenna Handover, and then press ENTER.
5–45
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.10.9.1 CONFIG: Misc  MEO Antenna Handover
Antenna Handover: Enabled
Mode = Manual
DPD = 00
()
Use the ◄ ►arrow keys to navigate to the proper line:
First, on the top line – Use the ◄ ►arrow keys to select the Antenna Handover operational
control, and to set the DPD (Digital Pre-Distortion) limit.
•
To set the Antenna Handover operation, use the ▲▼ arrow keys to select operation as
Enabled or Disabled.
•
To set a value for the DPD limit for this unit, use the ▲▼ arrow keys to select a DPD value
from -13 to (+)13.
Next, on the bottom line – Use the ▲▼ arrow keys to set the Antenna Handover switching
mode as Manual or Auto.
Press ENTER when done.
5.2.1.11 CONFIG: Mask
The Mask submenus allow you to selectively mask (ignore) or make active various alarms and
traffic conditions that are monitored by the modem.
Alarm Masks: AIS Buffer Ref RxIF TxClk
TxSat RxSat Terr ROp BUC LNB CEX
()
Use the ◄ ►arrow keys to select AIS, Buffer, Ref, RxIF, TxClk, TxSat, RxSat, Terr, ROp, BUC, LNB
and CEX, and then press ENTER.
5.2.1.11.1 CONFIG: Mask  AIS
AIS:
Tx-Terr-AIS = Masked
Rx-Sat-AIS = Active
(Active,Mask)
()
Use the ◄ ►arrow keys to select Tx-Terr-AIS or Rx-Sat-AIS, and then use the ▲▼ arrow keys to
select either as Active or Masked. Press ENTER when done. Note the following:
•
Selecting Tx-Terr-AIS as Active generates a fault whenever the modulator senses that the
‘all ones’ condition is present in the terrestrial data.
5–46
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
•
Selecting Rx-Sat-AIS as Active generates a fault whenever the demodulator senses that the
‘all ones’ condition is present in the receive data.
•
Typical for either, selecting AIS as Masked generates no alarms.
5.2.1.11.2 CONFIG: Mask  Buffer or Ref
Buffer Slip Alarm = Active (Active,Mask)
Reference Alarms = Active
()
Use the ◄ ►arrow keys to select Buffer Slip Alarm or Reference Alarms, and then typical for
either use the ▲▼ arrow keys to select as Active or Masked. Press ENTER when done. Note the
following:
•
Selecting the Buffer Slip Alarm as Active generates a Buffer Slip fault in the Rx faults
whenever the receive circuitry senses that the buffer is either underflowing or overflowing.
5.2.1.11.3 CONFIG: Mask  RxIF
RxIF Alarms: AGC=Active (Active,Mask)
EbNo=Masked
()
Use the ◄ ►arrow keys to select AGC or EbNo and then, typical for either, use the ▲▼ arrow
keys to select the alarms as Active or Masked. Press ENTER when done. Note the following:
•
Selecting the AGC Rx IF Alarm as Active generates an AGC fault whenever the receive signal
level exceeds –20 dBm (for the desired carrier).
•
Selecting the EbNo Rx IF Alarm as Active generates an Eb/No fault whenever the
demodulator sees the receive Eb/No fall below the pre-determined value.
•
Typical for either, selecting the alarm as Masked, generates no alarms.
5.2.1.11.4 CONFIG: Mask  TxClk
Tx Clock Alarm: = Masked (Active,Masked)
(Valid in G.703 & Ext clock modes)
()
Use the ◄ ►arrow keys to select the Tx Clock Alarm as Active or Masked, and then press
ENTER. Note the following:
•
Selecting the Tx Clock Alarm as Active generates a Tx Traffic alarm if a G.703 interface is
active and the input is lost or removed, or if selecting another interface type where the Tx
Clock mode is External and the clock is lost or removed.
5–47
CDM-625 Advanced Satellite Modem
Front Panel Operation
•
Revision 15
MN-CDM625
Selecting the Tx Clock Alarm as Masked generates no alarm.
5.2.1.11.5 CONFIG: Mask  TxSat (Satellite Tx Alarms)
Process Alarms from
BWA1=Off BWA2=Off
(Off,H/W,S/W)
BWA3=S/W BWA4=H/W
To determine how the Tx IDR backward alarm inputs are to be used, the alarm may be disabled
(Off); otherwise, an activated alarm may respond to a hardware input at P5A (H/W) or be
software controlled by a receive fault on the modem (S/W).
Use the ◄ ►arrow keys to select which Backward Alarm is to be configured – BWA1, BWA2,
BWA3, or BWA4 – and then use the ▲▼ arrow keys to set that alarm as Off, H/W, or S/W.
Press ENTER when done.
5.2.1.11.6 CONFIG: Mask  RxSat (Satellite Rx Alarms)
Process Alarms received from Satellite
BWA1=N BWA2=N BWA3=N BWA4=N
(Yes,No)
Use the ◄ ►arrow keys to select which Rx IDR backward alarms are to be monitored – BWA1,
BWA2, BWA3, or BWA4 – and then use the ▲▼ arrow keys to select Yes (to monitor) or No (to
mask). Press ENTER when done.
5.2.1.11.7 CONFIG: Mask  Terr
These alarms are applicable only to D&I operation.
Terr-Alm: Tx= Active
Rx= Off
(Active,Mask)
(Off,Enabled)()
Use the ◄ ►arrow keys to select Terr-Alm Tx or Rx and then, typical for either, use the ▲▼
arrow keys to set that alarm as Active or Masked. Press ENTER when done.
5.2.1.11.8 CONFIG: Mask  ROp (RAN Optimization) (FUTURE)
RAN Optimization Rx Alarm = Active
(Active,Masked)
()
Although selectable/viewable, this mask is reserved for the RAN Optimization option card which,
at present, is not supported. It will be supported in a future release.
5–48
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.11.9 CONFIG: Mask  BUC
Appendix F. CDM-625 ODU (TRANSCEIVER, BUC, LNB) OPERATION
BUC alarm = Active
Attach to Tx alarm = No
(Active,Mask)
(Yes,No)()
When using L-Band, a Block Up Converter (BUC) may be included in the system. A ‘smart’ BUC
may be monitored and/or controlled via the modem via FSK (Frequency-Shift Keying control).
For a modem in a 1:1 redundancy setup, you must customize the fault indications for the
physical setup.
5.2.1.11.10 CONFIG: Mask  LNB
Appendix F. CDM-625 ODU (TRANSCEIVER, BUC, LNB) OPERATION
LNB alarm = Active
Attach to Rx alarm = No
(Active,Mask)
(Yes,No)()
When using L-Band, a Low-Noise Block Down Converter (LNB) may be included in the system. It
cannot be monitored and/or controlled by the modem, except for the power supply values. For a
modem in a 1:1 redundancy setup, you must customize the fault indications for the physical setup.
5.2.1.11.11 CONFIG: Mask  CEX (G.703 Clock Extension mask)
G.703 Clock Extension = Active
(Active, Masked)
()
Use the ▲▼ arrow keys to select Active or Masked, and then press ENTER.
Selecting Active generates a CEX alarm if the G.703 Clock Extension mode is set to TxLock and
the input is lost or removed from the G.703 interface.
5.2.1.12 CONFIG: Remote (Remote Control)
Remote Control=Local
(Local,Serial remote,Ethernet)
()
Use the ▲▼ arrow keys to select Local, Serial remote, or Ethernet, and then press ENTER.
5–49
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
If selecting Local, then reconfiguration via Serial Remote or Ethernet is not permitted although
remote monitoring is still possible. If Local or Serial Remote selected, a typical submenu is
displayed – proceed to the next section.
5.2.1.12.1 CONFIG: Remote  Local or Serial remote settings
Interface= RS-485-4W
Address= 0001
(232,485-2,485-4)
9600 baud
()
If selecting either Local or Serial remote control, use the ◄ ► arrow keys to select Interface,
Address, or Baudrate; then, use the ▲▼ arrow keys to edit the Interface type, Baudrate, and
each digit of the Address. Note the following:
•
Character format is not selectable and is fixed at 8-N-1.
•
For RS-485 (aka EIA-485) – The permitted address range is from 0001 to 9999. Address 0000
is reserved for universal addressing.
•
For RS-232 (aka EIA-232): The Address is fixed at 0000.
5.2.1.13 CONFIG: IP
IP Config: Addresses SNMP Setup
ANT
AccessList PktP-Enable
()
Use the ◄ ►arrow keys to select Addresses, SNMP, Setup, ANT, AccessList, or – displayed only
when the optional IP Packet Processor card is installed – PktP-Enable, and then press ENTER.
5.2.1.13.1 CONFIG: IP  Addresses
IP Addresses:
Addr/Range
MAC
Gateway
()
Use the ◄ ►arrow keys to select MAC, Gateway, or Addr/Range, and then press ENTER.
CONFIG: IP  Addresses  MAC
Ethernet MAC Address:
00-06-B0-00-01-06
(read-only)
This read-only screen displays the unit MAC address. Press ENTER or CLEAR to return to the
previous menu.
5–50
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
CONFIG: IP  Addresses  Gateway
Ethernet IP Gateway:
192.168.001.002
()
To edit the IP Gateway Address for the Ethernet M&C port for this unit, use the ◄ ►arrow keys
to select a digit to edit, and then use the ▲▼ arrow keys to change that digit. Press ENTER
when done.
CONFIG: IP  Addresses  Address/Range
Ethernet IP Address/Range:
192.168.001.002/24
()
To configure the IP Address for the Ethernet M&C port for this unit, use the ◄ ►arrow keys to
select a digit to edit, and then the ▲▼ arrow keys to change that digit. Press ENTER when done.
5.2.1.13.2 CONFIG: IP  SNMP
SNMP:
Communities
Traps
()
Use the ◄ ►arrow keys to select Communities or Traps, and then press ENTER.
CONFIG: IP  SNMP  Communities
SNMP Communities:
Read
Write
()
Use the ◄ ►arrow keys to select Read or Write, and then press ENTER.
CONFIG: IP  SNMP  Communities  Read
SNMP Read Community:
Public
(20 chars)
()
To edit the SNMP Read Community string, use the ◄ ►arrow keys to select a character to edit,
and then use the ▲▼ arrow keys to edit that character.
Only the first 20 characters on the bottom line are available.
All printable ASCII characters are available with the exception of the backslash (ASCII code 92)
and ~ (ASCII code 126).
5–51
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Press ENTER after composing the SNMP Read Community String. All trailing spaces are removed
from the string upon entry.
CONFIG: IP  SNMP  Communities  Write
SNMP Write Community:
Private
(20 chars)
()
To edit the SNMP Write Community string, use the ◄ ►arrow keys to select a character to edit,
and then use the ▲▼ arrow keys to edit that character.
Only the first 20 characters on the bottom line are available.
All printable ASCII characters are available with the exception of the backslash (ASCII code 92)
and ~ (ASCII code 126).
Press ENTER after composing the SNMP Write Community String. All trailing spaces are removed
from the string upon entry.
CONFIG: IP  SNMP  Traps
Traps:
Community
Version
IP-Addr#1 IP-Addr#2
()
Use the ◄ ►arrow keys to select Community, Versions, IP-Addr#1 or IP-Addr#2, and then press
ENTER.
CONFIG: IP  SNMP  Traps  Community
SNMP Traps Community:
Comtech
(20 chars)
()
To edit the SNMP Traps Community string, use the ◄ ►arrow keys to select a character to edit,
and then use the ▲▼ arrow keys to edit that character.
Only the first 20 characters on the bottom line are available.
All printable ASCII characters are available with the exception of the backslash (ASCII code 92)
and ~ (ASCII code 126).
Press ENTER after composing the SNMP Traps Community String. All trailing spaces are removed
from the string upon entry.
5–52
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
CONFIG: IP  SNMP  Traps  Version
SNMP Traps Version:
SNMP-ver1
(ver1,ver2)
()
Use the ◄ ►arrow keys to select SNMP-ver1 or SNMP-ver2, and then press ENTER.
CONFIG: IP  SNMP  Traps  Address
Trap IP addr #1:
000.000.000.000
()
To edit the SNMP Trap Destination’s IP Address, use the ◄ ►arrow keys to select a digit to edit,
and then use the ▲▼ arrow keys to change that digit.
To disable SNMP Traps, set both Trap IP Addresses as 000.000.000.000.
5.2.1.13.3 CONFIG: IP  Setup
IP Setup: Mode WAN PerPortCnfg DDMgmtPt
MAC-Learning VLAN QoS Stats FrmSize ()
Use the ◄ ►arrow keys to select Mode, WAN, PerPortCnfg, DDMgmtPt, MAC-Learning, VLAN,
QoS, Stats, or – displayed only on modems with Hardware Version 2.X or higher – FrmSize, and
then press ENTER.
CONFIG: IP  IP Setup  Mode
Working Mode: Router Point to Point
(ManagedSwitch,R-PtoP, R-MPHub,R-MPRm)()
Use the ◄ ►arrow keys to select ManagedSwitch, R-PtoP (Router Point-to-Point), R-MPHub
(Router Multipoint-to-Hub), or R-MPRm (Router Multipoint-to-Remote), and then press ENTER.
If the optional IP Packet Processor card is either not installed or installed but
disabled, the mode is “Fixed at Managed Switch Mode”.
5–53
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
CONFIG: IP  IP Setup  WAN
WAN:
Buffer Length = 240ms
Avg Buffer Fill State = 00%
()
On the top line – Use the ▲▼ arrow keys to edit the WAN Buffer Length, and then press ENTER.
The value is configurable from 20ms to 780ms in 20ms increments. Packets are dropped when
the buffer is exceeded.
On the bottom line (read-only) – The percentage of the Average WAN Buffer Fill State displays
across a 4-second duration.
If the optional IP Packet Processor card is installed and enabled, this menu is nonfunctional and displays as follows:
WAN:
Buffer Length = N/A due to PktP
Avg Buffer Fill State = xx%
()
CONFIG: IP  IP Setup  PerPortCnfg
Per-Port-Config:
Port1 Port2 Port3
Port4
()
Use the ◄ ►arrow keys to select Port1, Port1, Port1 or Port4, and then press ENTER.
CONFIG: IP  IP Setup  PerPortCnfg  Port#
Port#: Pause=Off
NegoSpeed:LinkDwn
Speed=Auto (Auto,100F/H,10F/H)
()
Where # denotes the selected Port.
On the top line – Pause Frame Flow Control is set on a per port basis; use the ▲▼ arrow keys to
set this control as On or Off (default is Off). To turn Pause on for the selected (active) port, you
must meet the following conditions:
1. Tx Data Rate, or IP Info Rate (if Sub-Mux is on), or a data rate calculated based on ModCod0
from the Symbol Rate in ACM, must be at least 128 kbps.
-and2. WAN Buffer Length must be large enough, so that Data Rate in kbps
length / 4096 ≥ 24.
5–54
x buffer
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
The actual negotiated speed (NegoSpeed:) is provided here as a read-only status display.
On the bottom line – Use the ▲▼ arrow keys to edit the desired speed setting. Note the
following:
Selection
Auto
Function
Sets the port speed as Auto Negotiated. This allows the ports to negotiate speed and half/duplex
operation.
100Full
Forces the Port to 100/Full.
100Half
Forces the Port to 100/Half.
10Full
Forces the Port to 10/Full.
10Half
Forces the port to 10/Half.
CONFIG: IP  IP Setup DDMgmtPt (Dedicated Management Port)
Dedicated Management Port: Port1
(Disabled,Port1,Port2,Port3,Port4) ()
Dedicated Management Port mode is not available when the optional IP Packet
Processor card is installed and enabled. Should you attempt to execute this
command under such a configuration, the screen is non-functional, and appears as
follows:
Dedicated Management Port: Disabled
(Fixed @ Disabled with PktP Present) ()
Use Dedicated Management Port mode in redundancy applications. When a redundant
CDM-625 is Offline (Standby), all four of the offline modem’s Ethernet ports are disabled unless
you configure one of the four ports as the ‘Dedicated Management Port.’
Use the ▲▼ arrow keys to set the ‘Dedicated Management Port’ as Disabled, or select one of
the Ethernet ports (Port1, Port2, Port3 or Port4). Press ENTER when done.
5–55
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
CONFIG: IP  IP Setup  MAC-Learning
Unit power must be cycled whenever MAC Learning mode is enabled or disabled.
MAC learning:
Off (Off, On)
()
MAC Learning is an Ethernet switch function that allows the LAN (user) side of the Ethernet
ports to learn the MAC addresses of the equipment connected to those ports. Learning applies
only to the LAN (user) side of the Ethernet ports. There is no learning on the WAN (modem) side
of the ports.
If On (enabled), the interface is in LAN-to-WAN learning mode, and the connections are learned
based on source MAC addresses and ingress ports. Once the connections are learned, the switch
will not send any more packets destined to local node over WAN.
If Off (disabled), the interface passes all packets from the LAN to the WAN.
Use the ▲▼ arrow keys to select On (to enable) or Off (to disable) MAC learning. Press ENTER,
and then cycle the unit power.
CONFIG: IP  IP Setup  VLAN
If the optional IP Packet Processor card is installed and enabled, then the CONFIG:
IP  Setup  VLAN menu and its available submenus and operations described
hereafter, while selectable, are not functional.
VLAN: Disabled (Dis,Ena)
PortMode
VLAN-Table
Mgmt-VLAN=0001
()
VLAN Operation – Use the ◄ ►arrow keys to first select this operation parameter, and then use
the ▲▼ arrow keys to set VLAN Operation as Disabled or Enabled.
Mgmt-VLAN – To configure a Management Port’s VLAN ID, use the ◄ ►arrow keys to select a
digit to edit, and then use the ▲▼ arrow keys to change that digit. The value range is from 1 to
4095.
Hold down the ▲ ▼ arrow keys to quickly scroll between 1 and 4095.
PortMode or VLAN-Table – From the VLAN submenu, use the ◄ ►arrow keys to select either
parameter, and then press ENTER.
5–56
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
CONFIG: IP  IP Setup  VLAN  PortMode
Port Mode:
Port1 Port2
Port3
Port4
()
Use the ◄ ►arrow keys to select Port1, Port2, Port3 or Port4, and then press ENTER.
CONFIG: IP  IP Setup  VLAN  PortMode  Port#
Port #: Port Mode= Trunk
PVID=N/A
()
Where # denotes the selected Port, use the ◄ ►arrow keys to select the operation parameter.
Then, use the ▲▼ arrow keys to select Access or Trunk.
When Port Mode is selected as Trunk, VLAN ID (PVID) is not applicable. On the bottom line of
the display, the selected port’s PVID will display as PVID=N/A.
Otherwise, when Port Mode set to Access, configure the VLAN IDs (PVIDs). To edit the PVID, first
use the ◄ ►arrow keys to select a digit to edit, and then use the ▲▼ arrow keys to change that
digit. Enter a PVID in the range from 0001 to 4095. The default is 0001.
Hold down the ▲ ▼ arrow keys to quickly scroll between 0001 and 4095.
CONFIG: IP  IP Setup  VLAN  VLAN-Table
VLAN Table:
View/Edit/Delete
Add-Entry
()
The VLAN table supports up to 32 entries. Use the ◄ ►arrow keys to select View/Edit/Delete
or Add-Entry, and then press ENTER.
CONFIG: IP  IP Setup  VLAN  VLAN-Table  View / Edit / Delete
VLAN ID:0001 P1:Filtered
P3:Tagged
P4:Untagged
P2:Untagged
ACT=None(N,E,D)
To view, edit, or delete existing VLAN IDs, first use the ◄ ►arrow keys to select the desired
parameter:
•
VLAN ID – Selects the tabulated VLAN ID. After selecting VLAND ID, use the ▲▼ arrow keys
to scroll through the available VLAN IDs.
5–57
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
•
ACT – Choose an action to undertake for the selected VLAN ID – NONE (default), Edit, or Del
(Delete).
•
P1 (Port1) through P4 (Port4) – With ACT=Edit active, you may update the selected port’s
behavior attributes, as assigned under the selected VLAN ID.
You have the following options:
•
View, without changing, the behavior attributes assigned to each port under the selected
VLAN ID: ACT=NONE (default).
•
Edit the behavior attributes assigned to each port under the selected VLAN ID. Once the
VLAN ID targeted for editing is selected, use the ◄ ►arrow keys to select the ACT
parameter, and then use the ▲ ▼
arrow keys to select ACT=Edit.
Next, to change the behavior attribute of a specific port as needed, use the ◄ ►arrow keys to
select P1, P2, P3, or P4. Then, use the ▲▼ arrow keys to designate the attribute for that port as
Tagged or Filtered for a Trunk port, or Untagged or Filtered for an Access port.
The “Untagged” option is available only when Port Mode has been set to Access
for the selected port.
You may not designate the behavior attributes for all four ports as “Filtered” – is
this is done, and you presses ENTER to save this configuration change, an error
message will display as follows:
ERROR: Entry with FILTERED on all ports
is not allowed.
Once the port attributes have been changed (with ACT=Edit active), press ENTER to save those
changes. ENTER must be pressed to save the change. CLEAR will discard the change.
You must take into consideration, when editing VLAN table entries, the following rules:
•
All Untagged/Tagged packets arriving at the LAN port are tagged (four byte VLAN “frame” is
added) with the configured VLAN ID.
•
If the port is in Port Mode, any packet arriving from the WAN that matches this PVID will
have the VLAN tag removed and passed out the Ethernet.
•
If the port is in Port Mode and the packet does not match the PVID, the VLAN table must be
checked to determine if the packet should pass. Packets leaving a port in Port Mode are
always untagged.
•
If the port behavior Port Mode attribute is set to Trunk, then the VLAN table is referenced
to determine if the packet should pass. In this mode, packets will either be filtered
(dropped) or passed “as is” with the VLAN header intact.
5–58
CDM-625 Advanced Satellite Modem
Front Panel Operation
•
Revision 15
MN-CDM625
Delete the selected VLAN ID. After targeting a VLAN ID for deletion, use the ◄ ►arrow keys
to select the ACT parameter, and then use the ▲▼ arrow keys to select ACT=Del. Press
ENTER to execute deletion of the selected VLAN ID.
You must take into consideration that, when deleting VLAN IDs, an entry
associated with an enabled PVID cannot be deleted.
CONFIG: IP  IP Setup  VLAN  VLAN-Table  Add-Entry
VLAN ID:????
P3:Tagged
P1:Tagged P2:Tagged
P4:Untagged
ADD ()
To add new entries to the VLAN table:
•
First, use the ◄ ►arrow keys to select the ???? character string following the VLAN ID:
parameter.
•
Then, use the ▲▼ arrow keys to replace the string with a new VLAN ID.
Hold down the ▲▼ arrow keys to quickly scroll between 1 and 4095.
•
Next, use the ◄ ►arrow keys to select the port (P1/Port1 through P4/Port4), and then use
the ▲▼ arrow keys to set the behavior attribute for that port as Tagged, Filtered, or
Untagged.
The port attribute assignment restrictions explained previously apply.
•
Once you assign the VLAN ID and the port behavior attributes, press ENTER to create the
new entry. You are then returned to the previous menu.
Note the following:
•
If you attempt to add an entry that is named identically to an existing VLAN ID, an error
message displays as follows:
ERROR: vid already exists in table
•
If you attempt to add a new entry, and the VLAN table has already reached the 32 maximum
allowable entries, an error message displays as follows:
Can not add new entry!
VLAN table is FULL!
5–59
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
You must follow these rules when creating or adding a VLAN table entry:
•
The VLAN ID (0001-4095) must be unique – it cannot be a duplicate of any previously
assigned VLAN ID, including PVIDs in the VLAN ID table.
•
If a port is not in Trunk Mode (PortMode = Trunk), the behavior attribute for each port may
be set as Tagged or Filtered.
For any VLAN ID (Trunk Mode) created, at a minimum, one port must be
defined as ‘Tagged’.
You must follow these rules when assigning PVIDs:
•
The PVID (0001-4095) must be unique – it cannot be a duplicate of any previously assigned
VLAN ID, including PVID. The only exception to this rule is that the default value 0001 may
be assigned as the PVID for all ports.
•
If a port is in Access Mode (Port Mode = Access), the behavior attribute for each port may
be set as Untagged or Filtered.
•
PVIDs are automatically entered into the VLAN ID Table when changed.
•
When a new PVID entry is added to the VLAN ID Table, the “other” ports will default to
Filtered.
•
When a PVID is changed, the entry in the VLAN ID Table for that port will change to Filtered.
If the rest of the ports are also Filtered, then delete that entry. If any other port has been
marked Tagged, leave the entry in the table.
THE FOLLOWING EXAMPLES OF THE VLAN PORT CONFIGURATION AND ID TABLES ARE
PROVIDED FOR USER REFERENCE:
VLAN Port Configuration
Port
1
2
3
4
Port Mode
Trunk
Trunk
Trunk
Access
Native VLAN ID
N/A
N/A
N/A
3400
VLAN ID
Port 1
VLAN ID Table
Port 2
344
454
3400
Tagged
Filtered
Filter
Filtered
Tagged
Tagged
5–60
Port 3
Port 4
Tagged
Tagged
Filter
Filter
Untagged (Access mode)
Untagged (Access mode)
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
CONFIG: IP  IP Setup  QoS (Quality of Service)
Chapter 20. QUALITY OF SERVICE (QoS)
QoS functionality is dependent on whether the optional IP Packet Processor card is either a) not
installed or installed but disabled, or b) installed and enabled.
QoS Mode: L2 QoS
L3 QoS
()
Use the ◄ ►arrow keys to select the basic QoS setup as L2 QoS or L3 QoS:
•
Select L2 QoS (Layer 2) when the optional IP Packet Processor card is either not installed or
installed but disabled.
•
Select L3 QoS (Layer 3) when the optional IP Packet Processor card is installed and enabled.
L3 QoS is required to support IP Packet Processor Managed Switch Mode.
Press ENTER to continue.
CONFIG: IP  IP Setup  QoS L2 QoS
L2 QoS=Off
(Off,VLAN,PT,VLAN&Port)
()
Use the ▲▼ arrow keys to set the L2 QoS operational priority, and press ENTER when done. The
choices are as follows:
Selection
Function
Off
QoS disabled.
VLAN
(VLAN Priority only) QoS traffic prioritization is applied based o n the priority bits in the LAN
ingress packet’s VLAN tag.
PT
(Port Priority only) QoS traffic prioritization is applied based on LAN ingress traffic port.
VLAN&Port
(VLAN and Port Priority) In this mode, if the LAN ingress packet contains a V LAN tag, it will
then apply the VLAN Priority scheme; otherwise it applies the port-based priority scheme.
When selecting Port (only) or VLAN&Port, the display updates to include Port Priority on the
bottom line:
L2 QoS=Port only
(Off,VLAN,PT,VLAN&Port)
Port Priority: P1:1 P2:2 P3:1 P4:1 ()
To define Port Priority, use the ◄ ►arrow keys to select the port (P1, P2, P3, or P4), and then
use the ▲▼ arrow keys to designate a priority from 1 to 4 (with Priority 4 being the highest).
5–61
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
CONFIG: IP  IP Setup  QoS L3 QoS
When the optional IP Packet Processor card is either not installed or installed but disabled, and
L3 QoS is selected, this menu is disabled and appears as follows:
L3 QoS=Off
(Fixed at Off)
()
Otherwise, when the optional IP Packet Processor card is installed and enabled, the L3 QoS
menu appears as follows:
L3 QoS=Off
(Off,Max/Prio,MinMax,DiffServ)
()
To set the L3 QoS operational priority, use the ▲▼ arrow keys, and press ENTER when done.
The choices are as follows:
Selection
Function
Off
QoS disabled.
Max/Prio
(Maximum priority only) Provides multi-level traffic prioritization with the ability to limit
maximum traffic per priority class.
MinMax
(Minimum/Maximum priority) Provides a Committed Information Rate (CIR) to each
user-defined class of traffic with the ability to allow a higher burstable rate depending
on availability.
DiffServ
(DiffServ priority only) Industry-standard method of providing QoS, enabling
seamless co-existence in networks that implement DiffServ.
CONFIG: IP  IP Setup  Stats
IPstats: Port x
In
Unicasts: 00000003
Out ()
00000023
Clr:N
This screen provides IP traffic statistics for both the In (Ingress) and Out (Egress) directions. Use
the ◄ ►arrow keys to navigate to the proper line, in this order:
First, on the top line – Use the ▲▼ arrow keys to select the bottom-line IPstats type as WAN,
Ports 1 through 4, HDLC FPGA, or Management. (“In” and “Out” are column labels for the
bottom line parameters and are not selectable.)
Next, on the bottom line – Use the ▲▼ arrow keys to view the desired statistical parameter.
The following statistics are available:
5–62
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
IP Stats Type
Available Statistics
(Use ▲▼ to select) (Use ◄ ► to navigate to the bottom line, and then ▲▼ to display a desired statistic)
• WAN
HDLC Frames In / Out
Tx Dropped
Rx CRC Error
• Port 1
• Port 2
• Port 3
• Port 4
• HDLC FPGA
• Management
Unicasts
511 Octets
Broadcasts
1023 Octets
Pause
Max Octets
Multicasts
Jabber*
FCS Error
Oversize*
Align Error*
Discards
Good Octets
Filtered*
Bad Octets*
Collisions**
Undersize
Multiple**
Fragments*
Single**
64 Octets
Deferred**
127 Octets
Late**
255 Octets
Excessive**
*Indicates In only
**Indicates Out only
To clear the IP Statistics accumulators, use the ◄ ►arrow keys to move the cursor to Clr:N;
then, use the ▲▼ arrow keys to select Clr:Y. Press ENTER when done.
CONFIG: IP  IP Setup  FrmSize
This feature is supported only on modems with Hardware Version 2.X or higher.
2048 Ethernet Frame Size:
Enabled (Dis/Ena)
()
Use the ▲▼ arrow keys to set 2048-byte Ethernet packet sizes as Enabled or Disabled, and then
press ENTER.
5–63
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.13.4 CONFIG: IP  ANT (Advanced Network Timing)
IP Protocols:
SNTP
PTP
()
Use the ▲▼ arrow keys to select SNTP or PTP, and then press ENTER.
5.2.1.13.4.1 CONFIG: IP  ANT  SNTP (Simple Network Time Protocol)
SNTP: Disabled (Disabled, Enabled)
Servers: Primary Backup
()
Simple Network Time Protocol (SNTP) is used to synchronize computer clocks throughout a
computer network when the ultimate performance of the full NTP implementation as per
RFC-1305 (Requests for Comment No. 1305: Network Time Protocol, Version 3, Specification,
Implementation and Analysis) is not needed or justified.
On the top line – Use the ▲▼ arrow keys to select SNTP as Enabled or Disabled. If Enabled,
SNTP contacts the time server to update the Real-Time Clock (RTC) every 24 hours. If Disabled,
no such notifications take place.
On the bottom line – Use the ◄ ►arrow keys to first navigate to the bottom line, and then
select the Primary or Backup Server submenu. Pressing ENTER to continue:
[#######] Time Server: 192.168.001.010
Last Update: Never
()
(Where [######] Time Server denotes “Primary Time Server” or “Backup Time Server”):
On the top line – To edit the selected Time Server’s IP Address, use the ◄ ►arrow keys to select
a digit to edit, and then use the ▲▼ arrow keys to change that digit.
On the bottom line – this read-only field displays the time and date that the selected server was
last updated. The time is shown in military format (HH:MM:SS); the date is shown in DAYMONTH-YEAR format in accordance with European convention. This line specifies “Never” if no
update information exists.
5–64
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.1.13.4.2 CONFIG: IP  ANT  PTP (Precision Time Protocol)
Sect. 16.7.2 Precision Time Protocol (PTP) (Chapter 16. ETHERNET NETWORK
MANAGEMENT)
1. If the optional IP Packet Processor card is installed and enabled, then the
CONFIG: IPANTPTP menu and its available submenus and operations
described hereafter, while selectable, are not functional.
2. All network devices between the Grandmaster and Slave devices must support
PTP for sub-microsecond accuracy.
PTP Feature = Enabled
PTP Grandmaster = LAN
()
Precision Time Protocol (PTP) is a FAST-activated feature used to synchronize computer clocks
throughout a computer network. On LANs, PTP achieves clock accuracy in the sub-microsecond
range – much more accurate than what is attainable by NTP (Network Time Protocol) – and it is
also used in network applications where GPS is either unaffordable or inaccessible.
If Enabled, PTP is used to establish independent Wireless Receiver/Transmitter (WRT) protocol
segments – one for LAN and the other for WAN. If Disabled, by default the availability of the PTP
protocol is dependent on the near-end (e.g., the RNC/BSC) and distant-end (e.g., the BTS) IEEE
1588v2 (PTP) capable network devices in the network.
On the top line – Use the ▲▼ arrow keys to select PTP as Enabled or Disabled. Then, use the ◄
►arrow keys to first navigate to the bottom line. Use the ▲▼ arrow keys to select the PTP
Grandmaster as follows:
Selection
Function
LAN
The LAN port receives messages from the PTP master.
WAN
The WAN port receives messages from the PTP master.
Press ENTER when done.
5.2.1.13.5 CONFIG: IP AccessList
Use this menu to restore SNMP/HTTP access if your own IP Address is inadvertently
excluded from the Host Access List while configuring the list through either the
SNMP or Web Server (HTTP) interface.
The Host Access List allows a user to define which remote clients can connect when the Access
List is enabled. Each entry allows a user to specify an IP address and a subnet mask to define a
unique class of machines that are allowed access.
5–65
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
After defining and enabling an access list via SNMP or the CDM-625 Web Server interface
‘Admin | Access’ page, functionality of this menu appears as follows:
Host Access List is Enabled
Disable the List: No (N,Y)
()
Use the ▲▼ arrow keys to select N (No) to maintain the active Host Access List, or Y to disable
the list. Press ENTER when done. Once disabled, the following message appears whenever this
menu is selected:
Host Access List is Disabled
Use HTTP or SNMP to configure the list.
5.2.1.13.6 CONFIG: IP  PktP-Enable
This menu is visible/selectable only when the optional IP Packet Processor card is
installed.
Packet Processor: Enabled (Ena, Dis) ()
(Modem will auto-reboot after change!)
Use the ▲▼ arrow keys to select the card as Ena(bled) or Dis(abled), and then press ENTER. The
modem will automatically reboot after this configuration change. Note the following:
•
The default mode is Ena(bled).
•
When the IP Packet Processor is disabled, the card and its accompanying functionality is
completely bypassed and the modem reverts to its base modem Layer 2 switch
functionality.
5–66
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.2 SELECT: Test Menus
TEST: Mode BERT
()
CnC-APC-Monitor
Uncorrected-BER
Use the ◄ ►arrow keys to select Mode, BERT, CnC-APC-Monitor, or Uncorrected-BER, and
then press ENTER.
5.2.2.1
SELECT: TEST  Mode
Modem Test Mode = Normal
()
(NORM,Tx-CW,Tx-1/0,IF↓,RF↓,DIG↓,I/O↓)
Select Normal Operation or a Test Mode from the parameters shown in the parentheses. Use
the ▲▼ arrow keys, and then press ENTER, to select one of the following modes:
Selection
Function
NORM
(Normal) This c lears any t est modes or l oopbacks, and pl aces t he uni t bac k i nto an
operational state.
Tx-CW
(Transmit C W) Use t his test m ode to f orce t he modulator t o t ransmit a pur e c arrier
(unmodulated).
Tx-Alt-1/0
(Tx-1/0)
(Transmit an al ternating 1, 0,1,0 p attern) Use t his test mode t o c heck t he carrier
suppression of the Modulator This mode forces the modulator to transmit a carrier modulated
with an alternating 1,0,1,0 pat tern, at the currently selected symbol rate; t his causes two
discrete s pectral l ines t o appe ar, s paced at ± half t he s ymbol r ate, about t he c arrier
frequency.
IF-LOOP (IF↓)
(IF Loopback) Use this test mode to invoke an i nternal IF loop. This is a par ticularly useful
feature, as it permits you to perform a quick diagnostic test without having to disturb external
cabling. Furthermore, all of the receive configuration parameters are temporarily changed to
match th ose of t he t ransmit s ide. All pr evious values ar e restored onc e Normal is agai n
selected.
RF-LOOP (RF↓)
(RF Loopback) Use this test mode to perform a satellite loopback. It is almost identical to the
IF loop mode, except that all receive configuration parameters (except Rx Spectrum Invert)
are temporarily changed to match those of the transmit side; however, no internal connection
is made. All previous values are restored once Normal is again selected.
Dig-Loop
(DIG↓)
(Digital Loopback) Use this test mode to invoke a di gital loopback, which loops data at the
output of the Reed-Solomon encoder on t he transmit side and back into the Reed-Solomon
decoder on t he receive side. This tests the entire interface, transmit baseband circuits, FEC
encoder, FEC decoder, and buffer.
I/O-Loop (IF↓)
(Inward/Outward Loopback) Use this test mode to invoke two distinct loopbacks. The first is
the i nward l oop, w hich t akes dat a bei ng r eceived f rom t he s atellite di rection and pas ses i t
directly to the modulator. Simultaneously, the outward loop is invoked, whereby data being
fed to the transmit data interface is routed directly back out of the receive data interface.
5–67
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Figure 5-3 illustrates the IF, Digital, and I/O Loopback Test modes.
Figure 5-3. Loopback Modes
5–68
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.2.2
Revision 15
MN-CDM625
SELECT: TEST  BERT
BERT: Config
Monitor
()
Use the ◄ ►arrow keys to select Config or Monitor, and then press ENTER.
5.2.2.2.1 SELECT: TEST  BERT  Config
BERT
Cnfg
Tx:Off
Rx:Off
Pattern=2047
Pattern=2047
ErrIns=Off
()
Use the ◄ ►arrow keys to select a BERT configuration parameter, and then use the ▲▼ arrow
keys to select a parameter setting. The configuration options are as follows:
Option
Selection
Tx/Rx Options
Off or On
ErrIns Options
Off or 10E-3
Pattern Options
Space, Mark, 1:1, 1:2, 63, 511, 2047, 2047R, MIL188, 215-1, 220-1, 223-1
5.2.2.2.2 SELECT: TEST  BERT  Monitor
BERT Monitor:
Errs=0000000
BER=0.0E-07
Sync: OK
Restart
Press ENTER to restart the BERT Monitor.
5.2.2.3
SELECT: TEST  CnC-APC-Monitor
CNC-APC: BER=N/A
Reset
FER=N/A
Reset
()
The test results provided on this screen are as follows:
Test
Description
BER
Bit Error Rate
FER
Frame Error Rate
To restart either Test, use the ◄ ►arrow keys to select (BER) Reset or (FER) Reset, and then
press ENTER.
5–69
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Note that, when CnC-APC is disabled, this menu is inaccessible and displays the following
message:
CnC-APC is disabled.
5.2.2.4
()
SELECT: TEST  Uncorrected-BER
Uncorrected BER < 5.0E-6
In order for a valid test run, you must first configure the modem with Viterbi, VersaFEC CCM, or
ULL (Ultra Low Latency) FEC. If the modem is not configured with the required FEC, this screen
displays “N/A” in the place of a proper test value on the top line, and a configuration advisory
follows on the bottom line:
Uncorrected BER=N/A
Requires Viterbi, VersaFEC CCM or ULL()
•
•
Sect. 5.2.1.3.4 CONFIG: Tx  FEC
Sect. 5.2.1.4.3 CONFIG: Rx  FEC
Additionally, if the demodulator is in unlocked state, this menu is inaccessible and displays the
following message:
Demodulator is unlocked
5–70
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.3 SELECT: Monitor Menus
Monitor: Live-Alarms
Statistics Rx-Params
Stored-Events ACM
AUPC CnC IP ()
Use the ◄ ►arrow keys to select Live-Alarms, Stored-Events, ACM, Statistics, Rx-Params,
AUPC, CnC, or IP, and then press ENTER.
5.2.3.1
Monitor: Live-Alarms
Live
Alarms
Unit=None
Rx=Demod Lock
Live
Alarms
BUC=None
LNB=None
Net=None
Tx=No Clock ()
()
Six alarm types are available between two screens, as shown in the preceding examples. Use the
▲▼ arrow keys to navigate between these read-only pages. The highest priority alarm
currently active for each of the alarm types is as follows:
Description
Alarm Type
Unit
Tx
(Transmit)
PSU
Power supplies (+5V, +12V, -5V, +18V, -12V) are always monitored by
an onboard supervisory IC.
Tx and Rx Synth
The PLLs in the IF sections are monitored for an unlocked condition.
Power Cal
Calibration dat a s tored i n E EPROM i s ch ecked at pow er-up t o v erify
that the factory calibration has not been corrupted.
FPGA
Downloads are verified to have been loaded successfully.
Hi-Stab Freq Ref
Module
No PLL Lock – This will suppress the Tx carrier.
No Clock
Clock activity from the Tx terrestrial source is checked if expected. The
modem f alls bac k t o t he i nternal S CT c lock t o dr ive t he m odulator if
clock activity is absent.
FIFO Slip
Alarm oc curs w hen t he t errestrial c lock s ource di ffers f rom t he
programmed data rate, or may indicate a hardware failure.
Tx AIS
Alarm Indication Signal (all 1’s) is monitored at the Tx terrestrial input if
present.
AUPC Level
A Tx alarm occurs if the power increase limit has been reached when
AUPC is enabled.
Hi-Stab Freq Ref
Activity Fault
Reference not present; unit falls back to its internal 10MHz.
BUC summary alarm
May occur only if ABA is enabled.
G.703 Loss of Signal
May only occur in Clock Extension Mode.
5–71
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Description
Alarm Type
Rx
(Receive)
Net (Unit
Network)
BUC
LNB
5.2.3.2
Demod Lock
Indicates either the demodulator or the following FEC decoder cannot
lock to the incoming signal.
AGC Alarm
Indicates if the demod signal level is out of range.
Frame Sync
Indicates t hat t he de -framing u nit ( EDMAC, I BS o r I DR) or R eedSolomon outer decoder cannot synchronize to the data being sent to it
by the demod and/or FEC decoder.
Buffer Slip
Occurs w hen Doppler or Plesiochronous ef fects c ause t he Rx data
buffer to empty or fill completely, which results in a reset to 50%.
Rx AIS
Alarm I ndication S ignal ( all 1’ s) is m onitored i f present at t he R x
satellite input.
EbNo Alarm
Occurs when the monitored level drops below what was programmed
via menus: Config, Rx, EbNo Alarm point.
Buffer Clock
Indicates that the desired buffer reference is not present, causing the
buffer to fall back on Rx satellite timing to clock its output.
Loss TxFrm
Loss of Tx frame occurs in Drop & Insert operation, when the incoming
T1 or E1 frame cannot be found by the modem.
BER >10E-3
This error rate monitor is enabled for IBS and IDR framing.
Loss TxMul
Loss of T x m ultiframe oc curs i n E 1-CAS D &I oper ation, w hen t he
multiframe marker for CAS signaling data cannot be found.
Tx Sig AIS
An A IS condition i n t he signaling pos itions of an i ncoming E 1-CAS
frame is monitored.
Tx Terr RM
Indicates t he pr esence of t he Tx t errestrial r emote al arm on t he
incoming T1 or E1 frame.
IBS Rx Rem
Indicates t he pr esence of t he I BS satellite r emote al arm ( backward
alarm) on the incoming IBS frame from the transmit side of the link.
IDR Rx BW1-4
Multi-destination backward al arms ar e t he c orresponding s atellite
alarms used by the IDR frame structure.
IDR Tx BW1-4
Backward alarms 1-4 indicate that the hardware inputs available on the
back panel of the modem have t riggered, resulting in the generation,
by the modem’s IDR framer, of a corresponding Tx backward alarm.
Appendix F. CDM-625 ODU (TRANSCEIVER, BUC, LNC) OPERATIONS
Monitor: Stored Events
Stored Events: Clear-All: No (No,Yes)
#199 FT- Frame Sync
25/10/07 16:25:24
An example of a Stored Events screen is shown here. Use the ◄ ►arrow keys to select the ‘#’
character on the bottom line, and then use the ▲▼ arrow keys to scroll up and down through
the event log entries. Press ENTER or CLEAR to return to the previous menu.
5–72
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
The event log can store up to 255 events. When a fault condition occurs, it is time- and datestamped and put into the log. Similarly, when the fault condition clears, this is also recorded.
The date is shown in DAY-MONTH-YEAR format in accordance with European convention.
Use the ◄ ►arrow keys to select Clear-All, and then use the ▲▼ arrow keys to select Yes or
No. Press ENTER when done.
Upon selecting Clear-All=Yes, the event log clears and the modem returns you to the previous
menu. However, if there already are faults present on the unit at this time, they are re- stamped
and new log entries are generated.
5.2.3.3
Monitor: ACM
TxModCod=01 QPSK
RxModCod=02 QPSK
.533 RemoteSNR=04.2dB
.631 LocalSNR=03.5dB
This read-only screen provides the active IP-ACM mode information as follows:
Selection
Function
TxModCod
Displays the Tx ModCod (00 through 11).
RemoteSNR
Displays the SNR reported by the remote modem.
RxModCod
Displays the Rx ModCod (00 through 11).
LocalSNR
Displays the SNR of the local unit.
If you attempt to access this display when the modem is not in IP-ACM mode, the following
message appears:
ACM Parameter is not available.
5.2.3.4
Monitor: Statistics
Stats 114: 16.0,16.0,9.0,9.0,16.5,16.5
07/04/10 14:48:06 Clear-All: No (N/Y)
This display shows the statistics data that has been measured and recorded. (To enable statistics
logging, see Sect. 5.2.1.10.8.) Use the ▲▼ arrow keys to scroll backwards or forwards through
the statistics log entries. The top line displays the statistics log entry number (the statistics log
can store up to 255 log entries), followed by that log entry’s statistical content. The bottom line
indicates the time and date of the entry shown in DAY-MONTH-YEAR format.
5–73
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
For statistics logging, you define a measurement interval (see CONFIG: Stats); then, during this
interval, Eb/No, Transmit Power Level Increase (TPLI), and Receive Signal Level (RSL) are
observed at a rate of once every second.
Per the example, at the end of the defined measurement interval period, the modem calculates
statistics data in the order that follows (from left to right on the top line):
•
(16.0,16.0) First, the Eb/No is calculated: The minimum Eb/No value observed in the interval
is provided first, and then the average Eb/No value observed follows. If the measured values
are ≥16.0 dB, then 16.0 is displayed.
•
(9.0,9.0) Next, the TPLI is calculated: The maximum TPLI observed in the interval is provided
first, and then the average TPLI value observed follows.
•
(16.5,16.5) Finally, the RSL is calculated: The minimum value observed in the interval is
provided first, and then the average RSL value observed follows (note that both values are
negative).
If the demod has lost lock during the measurement interval, the
minimum Eb/No will show ‘LOSS’ rather than indicate a value –
however, the average value (while the demod was locked) will still be
calculated
and
shown.
If, on the other hand, the demodulator has been unlocked for the entire
measurement interval, the average Eb/No will also show ‘Loss’ (i.e., the
display will show ‘Loss,Loss’).
In addition, If AUPC is not enabled, the values of maximum and average
TPLI will both show ‘0.0'.
Example 1:
08.0,13.5,2.5,1.8,30.0,25.1 means:
(08.0) Minimum Eb/No observed in the measurement interval = 8.0 dB
(13.5) Average Eb/No observed in the measurement interval = 13.5 dB
(2.5) Maximum TPLI observed in the measurement interval = 2.5 dB
(1.8) Average TPLI observed in the measurement interval = 1.8 dB
(30.0) Minimum RSL is observed in the measurement interval = -30.0 dB
(25.1) Average RSL is observed in the measurement interval = -25.1 dB
Example 2:
Loss,04.5,0.0,0.0,29.0,29.0 means:
(Loss) There was a loss of demod lock during the measurement interval
(04.5) Average Eb/No observed in the measurement interval = 4.5 dB
(0.0) Maximum TPLI observed in the measurement interval = 0 dB
(0.0) A verage T PLI obs erved in t he m easurement i nterval = 0 dB (which indicates no
AUPC activity, or that AUPC is disabled.)
(29.0) Minimum RSL is observed in the measurement interval = -29.0 dB
(29.0) Average RSL is observed in the measurement interval = -29.0 dB
5–74
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Press ENTER or CLEAR when done viewing to return to the previous menu, or use the ◄ ►arrow
keys to select the Clear-All option. Then, at the prompt, use the ▲▼ arrow keys to select Yes or
No and press ENTER to implement.
5.2.3.5
Monitor: Rx Parameters
Rx-Parameters: EbNo=11.4dB ∆F=+011.7kHz
BER=0.0E-9 Buffer=51%
RxLevel=-43.5dBm
If the demodulator is locked, then this screen shows the following:
Item
Description
Eb/No
This s hows t he v alue of Eb/No calculated by t he dem odulator. The v alue r eferred t o her e i s t he
energy per information bit (Ebi), divided by the noise spectral density (No).
∆F
The frequency offset of the received carrier, in kHz, with a displayed resolution of 100 Hz.
BER
This is an estimate of the corrected BER.
Buffer
Rx-Level
5.2.3.6
(Buffer fill state) This shows the fill state (in percent), of the receive Buffer. After a reset, it will read
50. A value <50% indicates that the buffer is emptying, and >50% indicates that it is filling.
A dBm reading indicating the signal level of the desired receive carrier with a displayed resolution of
0.5 dB
Monitor: AUPC-Parameters
AUPC-Params:
Remote EbNo= 6.8 dB
Transmit Power Increase= 1.2 dB
The top line displays the value of Remote Eb/No of the demodulator at the distant end of the
satellite link. The Remote Eb/No displays Unlock if the remote Demod is unlocked.
The bottom line shows how much the AUPC system has increased the output power. If AUPC is
not enabled, then the value of Tx Power Increase displays as 0.0 dB.
5.2.3.7
Monitor: CnC-Parameters
CnC-Params:PwrRatio=-04.1dB PSDR=+01.9dB
Freq-offset=-123.4kHz Delay=123.4ms
When enabled and locked, the screen displays the CnC performance data. This read-only display
updates once every second.
5–75
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.3.8
Revision 15
MN-CDM625
Monitor: IP Statistics
IPstats: Port x
In
Unicasts: 00000003
Out
00000023
()
Clr:N
This screen is identical to and displays the same performance information as the screen shown
in Sect. 5.2.1.13.3 CONFIG: IP  Setup  Stats.
5.2.4 SELECT: Info (Information) Menus
Info: All ID Mode Tx
Drop Insert Remote
Rx Clocks EDMAC
Alarm-Mask Misc
The read-only INFO screens display the modem’s current configuration information without
risking inadvertent changes.
Use the ◄ ►arrow keys to select All, ID, Mode, Tx, Rx, Clocks, EDMAC, Drop, Insert, Remote,
Alarm-Mask, or Misc, and then press ENTER.
After viewing any Info screen except All: Press ENTER or CLEAR to return to the previous menu.
5.2.4.1
Info: All
All = Start
(Stop, Start)
()
Use this menu to scroll through and review configuration settings on a sequential basis. The
configuration displays are read-only – no editing is possible.
To view the configurations – Use the ▲▼ arrow keys to select between Stop and Start. Press
ENTER to continue through all the displays.
To discontinue viewing – Press CLEAR, use the ▲▼ arrow keys to select Stop, and then press
ENTER.
5.2.4.2
Info: ID
Modem Circuit ID:
----A TEST MESSAGE TO SHOW CIRCUIT ID---
This screen displays the 40-character, user-defined Circuit ID string that was created using the
Utility Circuit-ID menu. The Circuit ID also appears in the title bar of compatible web browsers
for easy unit identification.
5–76
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.4.3
Revision 15
MN-CDM625
Info: Mode
Info:
Mode:
Tx= G.703B:D&I
Rx= G.703B:IBS
(B8ZS)
(B8ZS)
An example of a Mode Info screen is shown here.
5.2.4.4
Info: Tx
Tx:On 0070.0000MHz
PWR=-20.0 TSI=N
Vit+RS:220/200 00064.000 QPSK 7/8 Scrm
An example of the Tx Info screen is shown here. It displays the following information:
Item
Top line
Bottom
line
5.2.4.5
Configuration Setting
Tx Carrier
On, Off, or RTI.
Tx Frequency
xxxx.xxxx MHz.
Power
Power Level (dBm).
TSI
TSI = Tx Spectral Inversion, I=Inverted (on), N=Not inverted (off).
Encoder
FEC type: Viterbi, TCM, Vit+RS, TCM+RS, TPC, LDPC, VFEC, or
None:DE-xxx (DE is the Differential Encoder setting, shown as DE-Off or DEOn).
Data Rate
xxxxx.xxx kbps (an asterisk * indicates that the data sense is inverted).
Modulation
BPSK, QPSK, OQPSK, 8-PSK, 8-QAM, 16-QAM.
FEC Rate
1/2, 2/3, 3/4, 7/8, 0.95, 5/16, 21/44 or 1/1.
Scrambler
Scrm, None, or IESS (Turbo Only).
Info: Rx
Rx:0070.0000MHz
02.0dB +-30 RSI=N
Vit+RS:126/112 01544.000 QPSK 1/2 Scrm
An example of the Rx Info screen is shown here. It displays the following information:
Item
Top line
Configuration Setting
Rx Frequency
xxxx.xxxx MHz.
Eb/No
12.3 dB (Alarm Point).
Sweep Range
Up to ± 32 kHz.
RSI
RSI = Rx Spectral Inversion, I=Inverted (on), N=Not inverted (off).
5–77
CDM-625 Advanced Satellite Modem
Front Panel Operation
Item
Bottom
line
5.2.4.6
Revision 15
MN-CDM625
Configuration Setting
Decoder
FEC type: Viterbi, TCM, Vit+RS, TCM+RS, TPC, LDPC, VFEC, or
None:DE-xxx (DE is the Differential Encoder setting, shown as DE-Off or DE-On).
Data Rate
xxxxx.xxx kbps (an asterisk * indicates that the data sense is inverted).
Modulation
BPSK, QPSK, OQPSK, 8-PSK, 8-QAM, 16-QAM.
FEC Rate
1/2, 2/3, 3/4, 7/8, 0.95, 5/16, 21/44 or 1/1.
Descrambler
Scrm, None, or IESS (Turbo Only).
Info: Clocks
Clocks:Tx=Int(SCT) CEX=RxEnable E1-unbal
Rx=Int(SCT) Buffer=00016bytes REF=Int10
An example of a Clocks Info screen is shown here. It displays information for Tx Clock, G.703
Clock Extension, Rx Clock, Reference, and Buffer.
5.2.4.7
Info: EDMAC
EDMAC Function= On
EDMAC Mode= Master
EDMAC Addr= 0020
An example of an EDMAC Info screen is shown here. This screen indicates whether or not
EDMAC is enabled and, when EDMAC is enabled, it provides the EDMAC Mode and Address.
5.2.4.8
Info: Drop
Drop Type=
E1-CCS
CH:1
TS:01
An example of an Info Drop screen is shown here. This screen shows the Drop Type and channel
allocations.
When in QDI (Quad Drop & Insert) Mode, this screen displays the same
information as the CONFIG: D&I  Drop menu.
5–78
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.4.9
Revision 15
MN-CDM625
Info: Insert
Insert Type=
E1-CCS
CH:1
TS:01
An example of an Insert Info screen is shown here. This screen shows the Insert Type and
channel allocations. Press ENTER or CLEAR to return to the previous menu.
When in QDI (Quad Drop & Insert) Mode, this screen displays the same
information as the CONFIG: D&I  Drop menu.
5.2.4.10 Info: Remote
Remote-Control= Local
Interface= RS-232
Address= 0000
9600 baud
8N1
An example of a Remote Info screen is shown here. This screen shows if the unit is in Local,
Remote or Ethernet (IP) mode. It also displays the electrical interface type selected, the unit’s
address, and the active baud rate.
5.2.4.11 Info: Alarms Mask
Alarms Masked: TxAIS Terr REF TxClk
Buf-Slip AGC RxAIS Sat EbNo LNB
BUC
CEX
A sample Alarms Mask Info screen is shown here. Note that, while all available masks are
displayed here, this screen will show only the alarm(s) that are currently masked. For any alarm
that is not masked, a blank space assumes that item’s designated screen position.
5.2.4.12 Info: Misc
Miscellaneous: Normal
1:1 Switch=Not connected
Online
The Miscellaneous Info screen provides the following information:
Display
Item
Configuration Setting
Top line
Operational Mode
Test Mode or Normal.
1:1 Switch Link Status
Connected or Not Connected.
Redundancy Status
Offline or Online.
Bottom line
5–79
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.5 SELECT: Store/Ld (Store/Load) Menus
Configuration #2:
AVAILABLE
Load
Store
()
You can store up to 10 modem configurations into an assigned “slot” – 0 through 9. If a
configuration slot is available for storage, the bottom line notes the status of that slot as
AVAILABLE. Otherwise, if the slot contains an existing configuration, the bottom line specifies its
storage time in military format (HH:MM:SS); the date is shown in DAY-MONTH-YEAR format in
accordance with European convention.
To load (recall) a configuration setting:
•
First, use the ◄ ►arrow keys to move the cursor to the configuration slot number
(Configuration #X) and then use the ▲▼ arrow keys to select a slot number from 0 to
9.
•
Next, use the ◄ ►arrow keys to select Load, and press ENTER when done. Modem
operation then updates as per the configuration settings stored in this slot.
To store (save) a configuration setting:
•
First, make any desired configuration changes to the modem.
•
Next, use the ◄ ►arrow keys to move the cursor to the configuration slot number
(Configuration #X) and then use the ▲▼ arrow keys to select a slot number from 0 to
9.
•
Finally, use the ◄ ►arrow keys to select Store, and press ENTER when done.
Once a modem configuration is stored into the designated slot, the time and date are recorded,
and this information appears on the bottom line.
Store Override – When storing into a configuration slot that previously had information saved
into the working memory, you are required to confirm the request, as the existing information
will be overwritten:
Configuration #2. Override? No (Y,N)
14:06:37 26/10/12
()
Use the ▲▼ arrow keys to select the Override choice (Y or N), and then press ENTER.
5–80
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
5.2.6 SELECT: Utility Menus
Utilities: Set-RTC Display-Bright CarrID
LED Redundancy Circuit-ID Firmware
Em
Use the ◄ ►arrow keys to select Set-RTC, Display-Bright, CarrID, LED, Redundancy, Circuit-ID,
Firmware, or Em, and then press ENTER.
5.2.6.1
Utilities: Set-RTC
Edit Real-Time Clock:
Time: 12:01:02
Date:26/10/06
()
To edit the time and date settings of the Real-Time Clock, use the ◄ ►arrow keys to select a
digit to edit, and then use the ▲▼ arrow keys to change that digit. Press ENTER when done.
The date is shown in DAY-MONTH-YEAR format in accordance with European convention.
5.2.6.2
Utilities: Display-Bright
Edit Display Brightness:
100%
()
To edit the brightness of the VFD (Vacuum Fluorescent Display), use the ▲▼ arrow keys to
select a suitable brightness level. The selectable values are 25%, 50%, 75% or 100%. Press
ENTER when done.
5.2.6.3
Utilities: CarrID
Chapter 19. CARRIER ID (METACARRIER®)
Carrier ID:
Disabled
(Disabled, Enabled)
()
Use the ▲▼ arrow keys to select the Carrier ID (MetaCarrier) function as Enabled or Disabled,
and then press ENTER.
WHEN ENABLING CARRIER ID OPERATION, BE SURE TO CREATE A 24-CHARACTER
(MAX) CARRIER ID CUSTOM MESSAGE USING THE UTILITIES: CIRCUIT ID MENU (SEE
SECT. 5.2.6.6 Utilities: Circuit ID).
5–81
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.6.4
Revision 15
MN-CDM625
Utilities: LED
Front Panel LED Test: Enabled
(Enable,Disable)
()
Use the ▲▼ arrow keys to select Enable or Disable, and then press ENTER to continue. When
enabled, a test of all of the LEDs on the front panel is executed. Normal operations resume upon
completion of the test.
5.2.6.5
Utilities: Redundancy
Redundancy:
Traffic-IP-Addr/Range
1:1
1:N
Use the ▲▼ arrow keys to select Traffic-IP-Addr/Range, 1:1, or 1:N, and then press ENTER.
5.2.6.5.1 Utilities: Redundancy  Traffic-IP-Addr/Range
Traffic IP address/Range
192.168.001.001/24
()
To edit the Traffic IP Address and range, when the modem is part of a 1:1 or 1:N redundancy
application: First, use the ◄ ►arrow keys to select a digit to edit, and then use the ▲▼ arrow
keys to change that digit. Press ENTER when done.
5.2.6.5.2 Utilities: Redundancy  1:1
Press ENTER key to force Unit into
Standby (1:1 only)
For use when the modem is part of a 1:1 redundancy application (e.g., via a CRS-170A L-Band or
CRS-180 70/140 MHz 1:1 Redundancy Switch) and this unit is currently Online, press ENTER to
cause the unit to switch to Standby (i.e., go Offline).
5.2.6.5.3 Utilities: Redundancy  1:N
1:N Mode:
(use with CAUTION!)
Disabled (Enable, Disable)
()
For use when the unit is part of a 1:N redundant application (e.g., via a CRS-300 1:10
Redundancy Switch). Use the ▲▼ arrow keys to select 1:N Mode operation as Enable or
Disable, and then press ENTER.
5–82
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
When the unit is connected to a 1:N switch, a red LED located on the rear panel
labeled “1:N Active!” indicates that caution is required, as there may be DC voltages
and other control signals present on certain pins on the 25-pin Data Interface
connector.
5.2.6.6
Utilities: Circuit-ID
Edit this Modem’s Circuit ID:
()
----------------------------------------
To compose a Circuit ID string – On the bottom line, first use the ◄ ►arrow keys to select the
alphanumeric character space to edit, and then use the ▲▼ arrow keys to edit that character.
You may use the following characters to compose a Circuit ID string of up to 40 characters in
length or a MetaCarrier Custom Message of 24 characters or less:
[Space] ( ) * + - , . / 0-9 and A-Z.
Press ENTER once you finish composing the Circuit ID string. As created here, in addition to the
front panel VFD, the Circuit ID also appears in the title bar of compatible web browsers for easy
unit identification.
Proper composition of the Circuit ID string is dependent on whether the Carrier ID
(MetaCarrier) feature operation is enabled or disabled (see Sect. 5.2.6.3 Utilities:
CarrID):
1. With Carrier ID enabled, the first 24 characters of the 40-character Circuit ID
are intended for and sent as the MetaCarrier Custom Message. While you
must limit your MetaCarrier Custom Message to 24 characters or less, the full
40 characters of the Circuit ID will display on the front panel screen saver (see
Sect. 5.1.3.1 Screen Saver).
2. With Carrier ID disabled, the Circuit ID full 40 character length is available for
creation of the unit identification label that displays on the front panel VFD
screen saver and the Web browser title care.
5–83
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.6.7
Revision 15
MN-CDM625
Utilities: Firmware
THESE MENUS ARE FOR DIAGNOSTIC PURPOSES. ONLY CHANGE AN IMAGE IF
INSTRUCTED TO DO SO BY A COMTECH EF DATA CUSTOMER SUPPORT
TECHNICIAN.
Firmware Images:
Base-Modem
Packet-Processor
()
Use the ◄ ►arrow keys to select Base-Modem or Packet-Processor, and then press ENTER.
5.2.6.7.1 Utilities: Firmware  Base-Modem
Firmware Information:
Boot-ROM Image#1* Image#2
Select
()
Use these submenus to view information about the CDM-625 Base Modem internal firmware.
This screen identifies the firmware image that is loaded on startup or reboot of the Base Modem
with an asterisk (*). Use the ◄ ►arrow keys to select Boot-Rom, Image#1, Image#2, or Select,
and then press ENTER.
5.2.6.7.1.1
Utilities: Firmware  Base-Modem  Boot-ROM, Image#X
Bootrom:
FW/12865X
DD/MM/YY
#.#.#
The example shown here is for the Bootrom firmware opening screen. Typical for the Image#1
or Image#2 screens, you may use the ▲▼ arrow keys to scroll through information for all the
constituent firmware blocks that make up the bulk.
This read-only information is provided for: firmware type; its number (where ‘X’ is the revision
letter); its build date (in day/month/year format); and its version number (e.g., 2.1.0). Press
ENTER or CLEAR to return to the previous menu.
5.2.6.7.1.2
Utilities: Firmware  Base-Modem Select
Current Active Image is #1
Next Reboot, will use Image: #1
()
The modem can store two complete firmware images. Use this menu to select which image is
loaded the next time the unit reboots. The top line shows the current active image while, on the
bottom line, you may use the ▲▼ arrow keys to select the other image. Press ENTER when
5–84
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
done – a message will then prompt you to reboot the unit in order for the newly-selected image
to be loaded upon startup.
5.2.6.7.2 Utilities: Firmware  Packet-Processor
Packet Processor Firmware Information:
Boot-ROM
Image#1* Image#2 Select ()
This screen identifies the optional CDM-625 IP Packet Processor internal firmware image that is
loaded on startup or reboot of the Base Modem with an asterisk (*).
Use the ◄ ►arrow keys to select Boot-Rom, Image#1, Image#2, or Select, and then press
ENTER.
5.2.6.7.2.1
Image#X
Utilities: Fir mware
Bootrom:
FW-0000346X
Packet-Processor


Boot-ROM,
DD/MM/YY HH:MM:SS
#.#.#
The example shown here is for the IP Packet Processor Bootrom firmware opening screen.
Typical for the Bootrom, Image#1 or Image#2 screens, read-only information is provided for:
firmware type; its number (where ‘X’ is the revision letter); its build date- and time-stamps (in
day/month/year and hours/minutes/seconds formats); and its version number (e.g., 1.3.3).
Press ENTER or CLEAR to return to the previous menu.
5.2.6.7.2.2
Utilities: Firmware  Packet-Processor Select
Current Active Image is #1
Next Reboot, will use Image: #2
()
The modem can store two complete firmware images, and you can select which image loads the
next time the unit reboots. The top line shows the current active image while, on the bottom
line, you may use the ▲▼ arrow keys to select the other image. Press ENTER when done – a
message will then prompt you to reboot the unit in order for the newly-selected image to load
upon startup.
5–85
CDM-625 Advanced Satellite Modem
Front Panel Operation
5.2.6.8
Revision 15
MN-CDM625
Utilities: Em (CDM-600/600L Emulation)
The CDM-625 serves as a ‘drop-in’ replacement product for CDM-600 and CDM-600L modems.
An emulation mode is provided to accomplish this design intent, and is configurable via either
this menu or by remote control (remote command EMU=).
When emulating a CDM-600 or CDM-600L modem, the CDM-625 opening screen displays the
mode of operation, as per this example:
Comtech CDM-625
TPC, CnC installed
emulating a CDM-600
Ver 2.2.6
Note that, while emulating a CDM-600 or CDM-600L modem, the I/O responses (including that
of remote query EID?) replicate those of the emulated modem; further, the firmware version
number displayed on the opening screen, and the response from the SWR? remote query
reflects that of the emulated modem’s firmware version number.
There are some features that the CDM-625 does not support, and as a result are not possible
while in CDM-600 or CDM-600L Emulation Modes:
•
Sequential FEC coding;
•
RS-232 synchronous data interface;
•
External ref of 20 MHz;
•
BUC leveling;
•
Operation below 18 ksps or 18 kbps.
Other parameters have become ‘don’t care’:
•
Impedance;
•
External Clock.
5.2.7 SELECT: ODU Menus (Summary Only)
See Appendix F. CDM-625 ODU (TRANSCEIVER, BUC, LNB) OPERATION for complete
details about this product-specific menu branch.
ODU: BUC:PwrSupply+Ref
LNB:PwrSupply+Ref
5–86
FSK-control ()
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Depending on 70/140 MHz or L-Band operation: Use to monitor and control a standalone or
redundant Comtech EF Data RF Transceiver (CSAT-5060 or KST-2000A/B) or LPOD BUC if
connected.
5.2.8 SELECT: FAST Menus
The d isplay example a s s hown h ere d epicts a unit s hipped w ith t he T wochannel Audio D rop h ardware o ption i nstalled. If th is h ardware i s not
included, ‘Audio’ does not appear on the bottom line.
FAST:
Options
Demo-Mode
CnC
Baseboard S/N 123456789 HW Rev1.X Audio
FAST (Fully Accessible System Topology) allows you to enable new options in the modem. Use
the ◄ ►arrow keys to select Options, Demo-Mode, or CnC, and then press ENTER.
5.2.8.1
FAST: Options
FAST options:
View Options
Set Registers
()
You can access the FAST options via three separate internal EEPROM registers. Each register
requires its own FAST access code. Use the ◄ ►arrow keys to select View Options or Set
Registers (to continue via the correct register menu), and then press ENTER.
5.2.8.1.1 FAST: Options  View Options
FAST: View options: 01
Base 5 Mbps data rate installed
()
Use the ▲▼ arrow keys to scroll through the available options. The modem identifies each
selected FAST option as “installed” or “not installed”.
You must contact a Comtech EF Data sales representative, during normal business hours or via
e-mail to [email protected], to purchase the FAST Access Code for the desired option.
Available options include:
► Data Rate
► Data Rate when configured for TPC/LDPC
► Data Rate when configured for CnC (DoubleTalk Carrier-in-Carrier)
► Data Rate when configured for VersaFEC
5–87
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
► Data Rate when configured for Header Compression
► Data Rate when configured for Payload Compression
► Symbol Rate when configured for IP-ACM
► Open Network Framing
► Modulation:

8PSK/8-QAM

16-QAM
► Drop & Insert:

1-port D&I

4-port (Quad) D&
► L-Band
► IP-ACM (Adaptive Coding Modulation)
► 25 Mbps Header Compression
► 25 Mbps Payload Compression
► G.703 Clock Extension
► Advanced QoS (Quality of Service)
► AES Encryption
► Fractional CnC (DoubleTalk Carrier-in-Carrier)
► Advanced Network Timing (PTP – Precision Timing Protocol)
5.2.8.1.2 FAST: Options  Set Registers
Appendix C. FAST ACTIVATION PROCEDURE
FAST: Set register#:
88888888888888888888
Enter code below
then [ENTER] ()
Where ‘#’ is the appropriate register #1, #2, or #3: FAST: Options  Set Registers is used to
enable new options in the modem on a per-register basis. It is important to use the appropriate
FAST access code for the appropriate register.
Contact a Comtech EF Data sales representative, during normal business hours or via e-mail to
[email protected], to order the desired options (see Sect. 5.2.7.1.1) – be prepared to
provide the Modem Serial Number. The Comtech EF Data Customer Support representative will
5–88
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
verify the order and provide an invoice and instructions, including a register-specific 20-digit
FAST Access Code.
Enter the FAST Access Code that you have obtained from Comtech EF Data carefully using the
front panel keypad or, alternately, the CDM-625 Web Server (HTTP) Interface:
•
From the unit front panel – First, use the ◄ ►arrow keys to select a digit to edit, and then
use the ▲▼ arrow keys to change that digit. Compose the code carefully, and then press
ENTER only when you are ready to execute the upgrade.
For Firmware Ver. 1.5.1 or earlier, enter the FAST access code for option
register(s) #1, #2 and/or #3 as required. For Firmware Ver. 1.5.2 and later, all
three FAST access codes must be entered in sequence in order for the
purchased option upgrades to be properly activated.
The modem responds with “Configured Successfully ” upon completion of the
FAST upgrade; the modem then resets to its newly incorporated default configuration.
However, if you enter an invalid code, the modem rejects the entry and the unit prompts
you to re-enter the code as follows:
Failed to configure. Re-enter code.
88888888888888888888 then [ENTER] ()
Repeat the FAST access code entry procedure. Should the code entry error persist, contact
Comtech EF Data Customer Support for further assistance.
•
5.2.8.2
From the CDM-625 Web Server Interface – See Sect. 6.5.4.2.5 Admin | FAST.
FAST: Demo-Mode
FAST Options Demo Mode: Off (Off,On)
1209600 seconds remaining.
()
FAST Options Demo Mode allows access to ALL CDM-625 FAST options for 2592000 seconds (30
calendar days). On the top line, use the ▲▼ arrow keys to select Demo Mode as Off or On, and
then press ENTER. The bottom line displays the time remaining – the time format is in seconds.
Note the following:
•
The time count decrements only when Demo Mode is turned On. Demo Mode may be
turned on and off an unlimited number of times until the full 30 calendar days have expired.
Upon expiration of the Demo period, the following message displays:
FAST Options Demo Mode: Expired
0000000 seconds remaining.
5–89
()
CDM-625 Advanced Satellite Modem
Front Panel Operation
•
Revision 15
MN-CDM625
Once the timer decrements to 0000000, FAST Options Demo Mode may no longer be
enabled. Your modem will still function with the purchased FAST enabled features.
If the Demo Mode timer reaches 0000000 while the modem is running a
FAST feature that is not a purchased FAST feature, the modem will fall into
an invalid state, turn off its carrier, and revert all settings to factory default
settings.
5.2.8.3
FAST: CnC
FractionalCnC:1-YearCounter=00000000 sec
90-DayCounter= 0000000 sec
Fractional CnC is common in 1:1 or 1:N redundancy systems where the primary modem has a
full CnC license, and the backup modem(s) has a Fractional CnC license. A Fractional CnC licenses
allows 90 full calendar days of CnC usage in one calendar year. This lowers the cost of the
modem but does not allow for constant, round-the-clock operation.
When Fractional CnC Mode is ordered, the number of seconds remaining for both the 1-year
(top line) and 90-day (bottom line) activation timers are displayed here.
When the counters expire, the following message is displayed:
Fractional CnC is not installed.
As per the previous screen examples, if Fractional CnC is not installed in the unit, the modem
displays a message that no CnC license is installed and provides “time remaining” and “time
remaining refill” timers; or that a Full CnC license is installed and the screen displays no timers.
Note the following:
•
1-YearCounter – This is the calendar year counter, in seconds, that resets the 90DayCounter to 90 full days of CnC usage when it reaches 00000000. This counter continually
decrements and accounts for time even when the modem is powered Off. Once this timer
fully decrements, the 1-YearCounter resets to 31536000 once again and immediately begins
to decrement.
The 1-Year Counter cannot be reset or refilled in the field. Once the timer has
run out, your only options are to:
1) Upgrade the modem to a full license.
2) Wait until “1-YearCounter” reaches 00000000.
Using Fractional CnC is not a normative mode of operation. To best inform you
that your modem is running Fractional CnC (i.e., the “1-YearCounter” counter
5–90
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
is actively decrementing), your modem does the following:
•
o
The front panel RED Unit Status LED will blink on and off.
o
The modem generates an Event in the Event Log every 12 hours that
indicates Fractional CnC is running.
o
When connected to a 1:1 redundant switch, the modem generates a
phantom fault every 12 hours, allowing the Full License CnC modem to
return online if its fault has cleared.
90-DayCounter – This is the amount of time, in seconds, that that the modem can be run in
CnC mode. This counter decrements under the following conditions:
o
The modem has a Fractional CnC license
o
The modem is powered on
o
The modem’s TX is On
o
The modem is in standalone mode or in 1:1 redundancy configuration and is Online
o
The modem is NOT in Demo Mode. If the timer reaches 00:00:00:00, the modem
will turn its TX Off and the circuit will be down.
5–91
CDM-625 Advanced Satellite Modem
Front Panel Operation
Revision 15
MN-CDM625
Notes:
5–92
Chapter 6. ETHERNET-BASED
REMOTE PRODUCT
MANAGEMENT
6.1
Overview
A user-supplied, Windows-based PC is used for Ethernet-based Remote Product Management of
the CDM-625 Advanced Satellite Modem. The User PC facilitates this access through three
separately-operated protocols:
6.2
•
Simple Network Management Protocol (SNMP) – This requires a user-supplied Network
Management System (NMS) and a user-supplied Management Information Base (MIB) File
Browser.
•
Telnet Interface – This requires use of a user-supplied terminal emulation program such as
HyperTerminal (for use with the remote control protocol) or PuTTY (for use with the Telnet
Command Line Interface), installed on the User PC.
•
CDM-625 Web Server (HTTP) Interface – This requires a compatible user-supplied web
browser such as Internet Explorer, installed on the User PC.
Ethernet Management Interface Connectors
The CDM-625 base unit is equipped with four RJ-45 10/100 BaseT Ethernet connectors, subject
to the following conditions:
•
When Dedicated Management is disabled, you may use any port for Ethernet-based remote
monitor and control (M&C) purposes.
•
When Dedicated Management is enabled, you may use only that specific port for Ethernetbased remote monitor and control (M&C) purposes.
6–1
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.3
Revision 15
MN-CDM625
SNMP Interface
The Simple Network Management Protocol (SNMP) is an Internet-standard protocol for managing
devices on IP networks. An SNMP-managed network consists of three key components:
•
The managed device – This includes the CDM-625 Advanced Satellite Modem.
•
The SNMP Agent – The software that runs on the CDM-625. The CDM-625 SNMP Agent
supports both SNMPv1 and SNMPv2c.
•
The user-supplied Network Management System (NMS) – The software that runs on the
manager.
6.3.1 Management Information Base (MIB) Files
MIB files are used for SNMP remote management of a unique device. A MIB file consists of a
tree of nodes called Object Identifiers (OIDs). Each OID provides remote management of a
particular function. These MIB files should be compiled in a user-supplied MIB Browser or SNMP
Network Monitoring System server.
The following MIB files are associated with the CDM-625:
MIB File/Name
(where * is revision letter)
FW10874-2*.mib
ComtechEFData Root MIB file
Description
ComtechEFData MIB file gives the root tree for ALL Comtech EF Data products
and consists of only the following OID:
Name:comtechEFData
Type:MODULE-IDENTITY
OID:1.3.6.1.4.1.6247
Full path:
iso(1).org(3).dod(6).internet(1).private(4).enterprises(1).comtechEFData(6247)
Module: ComtechEFData
FW-0000083*.mib
CDM-625 MIB file
MIB file consists of all of the OIDs for management of the modem functions
FW-0000084*.mib
CDM-625 Traps MIB file
Trap MIB file is provided for SNMPv1 traps common for modem.
FW-0000345*.mib
IP Packet Processor MIB file
MIB file consists of all of the OIDs for management of the optional IP Packet
Processor functions.
FW10874-8*.mib
CSAT-5060 Transceiver MIB
file
MIB file consists of all of the OIDs for management of the CSAT-5060 Transceiver
connected to the CDM-625 modem through FSK.
FW10874-9*.mib
KST-2000A/B Transceiver
MIB file
MIB file consists of all the OIDs for management of the KST-2000A/B Transceiver
connected to the CDM-625 modem through FSK.
FW-0000165*.mib
DistantEnd CDM-625 MIB file
MIB file consists of a subset of the CDM-625 MIB with all OIDs used manage to a
distant-end CDM-625. SNMP "gets" and "sets" are sent to the local CDM-625 and
EDMAC3 is used to communicate efficiently with the distant end modem.
6–2
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.3.2 SNMP Community Strings
In SNMP v1/v2c, the SNMP Community String is sent unencrypted in the SNMP
packets. Caution must be taken by the network administrator to ensure that SNMP
packets travel only over a secure and private network if security is a concern.
The CDM-625 uses Community Strings as a password scheme that provides authentication
before gaining access to the modem agent’s MIBs. They are used to authenticate users and
determine access privileges to the SNMP agent.
Type the SNMP Community String into the user-supplied MIB Browser or Network Node
Management software.
You must define three Community Strings for SNMP access:
•
Read Community
default = public
•
Write Community
default = private
•
Trap Community
default = comtech
For proper SNMP operation, the CDM-625 MIB files must be used with the
associated version of the CDM-625 Advanced Satellite Modem M&C. See the
CDM-625 FW Release Notes for information on the required FW/SW compatibility.
6.3.3 SNMP Traps
The CDM-625 supports both SNMPv1 traps and SNMPv2 notifications. The modem has the
ability to send out SNMP traps when certain events occur and clear in the modem, including unit
faults, Tx faults, Rx faults, and ODU faults.
For the trap to work, the modem must be in Ethernet remote mode, and it must
have the Trap IP Address properly configured.
You only need to compile the “Traps” file if you intend to use SNMPv1 traps. You may configure
which style of traps the modem sends by using the CDM625SNMPTrapVersion OID.
The CDM-625 supports the following MIB2 v1 traps / v2 notifications:
MIB2 SNMPv1 trap: Authentication Failure
5
MIB2 SNMPv2 notifications: Authentication Failure
1.3.6.1.6.3.1.1.5.5
6–3
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
The CDM-625 supports the following Alarms and Faults SNMPv1 traps / SNMPv2 notifications:
Alarms and Faults SNMPv1 traps
cdm625UnitAlarmV1
6247641
cdm625TxTrafficAlarmV1
6247642
cdm625RxTrafficAlarmV1
6247643
cdm625OpenNetworkAlarmV1
6247644
cdm625BUCAlarmV1
6247645
cdm625LNBAlarmV1
6247646
cdm625RedundancyStateTrapV1
6247647
Alarms and Faults SNMPv2 notifications:
cdm625UnitAlarm
1.3.6.1.4.1.6247.34.2.0.1
cdm625TxTrafficAlarm
1.3.6.1.4.1.6247.34.2.0.2
cdm625RxTrafficAlarm
1.3.6.1.4.1.6247.34.2.0.3
cdm625OpenNetworkAlarm
1.3.6.1.4.1.6247.34.2.0.4
cdm625BUCAlarm
1.3.6.1.4.1.6247.34.2.0.5
cdm625LNBAlarm
1.3.6.1.4.1.6247.34.2.0.6
cdm625RedundancyStateTrap
1.3.6.1.4.1.6247.34.2.0.7
6–4
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.4
Revision 15
MN-CDM625
Telnet Interface
Comtech EF Data provides a Telnet interface for the purpose of equipment monitor and control
(M&C) using either the standard remote control protocol or, when the optional IP Packet
Processor is installed and enabled, the Telnet Command Line Interface (CLI).
6.4.1
Using the Telnet Interface for Remote Control Operation
Appendix D. REMOTE CONTROL
The Telnet interface requires login at the Administrator and Read/Write User Access Levels. An
example of the login process is shown here:
Once logged into the Telnet interface as the Administrator, the standard Remote Control
interface defined in Appendix D. REMOTE CONTROL is accessible, as shown here:
6.4.1.1
Using HyperTerminal for Telnet Remote Control Operation
There is a disadvantage when using Windows Command-line as a Telnet client with the standard
Remote Control protocol. Since Command-line cannot translate a ‘\r’ (i.e., carriage return or
“CR”) to a ‘\r\n’ (i.e., CR+line feed “LF”) for the messages coming from Telnet Server, any multi-
6–5
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
line Target-to-Controller response (e.g., the response to the FRW? query) will be displayed as
one line, with the latter lines overwriting the previous lines.
In order to view the full response messages, use of the HyperTerminal terminal emulation
program configured as a Telnet client is permissible.
Configure HyperTerminal as follows:
1. Be sure to properly define the “Connect To” Telnet connection properties (File 
Properties), as shown below at the near right:
A) Enter the CDM-625’s
Management IP Address as
the Host Address (e.g.,
192.168.1.1).
B) Enter TCP Port 23 as the Port
number.
C) Set Connect using to TCP/IP
(Winsock) instead of COM1 or
COM2.
2. For ASCII Setup (File  Properties  Settings  ASCII Setup), as shown above at the far
right:
A) Check the "Send line ends with line feeds" option in the ASCII Sending section.
B) Check the "Append line feeds to incoming line ends" option in the ASCII Receiving
section.
Examples of login and remote command/query execution, when using HyperTerminal as the
interface, appear as follows:
6–6
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.4.2
Revision 15
MN-CDM625
Using the Telnet Interface for Telnet Command Line Interface (CLI)
Operation
Appendix E. TELNET COMMAND LINE INTERFACE (CLI) OPERATION
(Left) TeraTerm CLI Example
(Right) PuTTY CLI Example
Figure 6-1. CDM-625 Telnet Command Line Interface (CLI)
1. The CDM-625 Telnet Command Line Interface (CLI) is accessible only when the
optional IP Packet Processor is installed and enabled.
2. The CDM-625 Telnet CLI uses Telnet TCP Port 107. Be sure to specify this port
when configuring your terminal emulator for CLI operation.
3. The HyperTerminal terminal emulator, while compatible for use with remote
control operations, is not supported or recommended for CDM-625 Telnet CLI
operation. Instead, for best results Comtech EF Data recommends PuTTY or
Tera Term or as the preferred terminal emulators (Figure 6-1).
6–7
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5
Revision 15
MN-CDM625
Web Server (HTTP) Interface
A user-supplied Web browser allows the full monitor and control (M&C) of the CDM-625 from
its Web Server Interface. The CDM-625’s embedded web application is designed for, and works
best with, Microsoft’s Internet Explorer Version 9.0 or higher. Comtech EF Data does not
recommend setting your browser to IE7 Compatibility Mode.
6.5.1
User Login
Type the CDM-625’s IP Address (shown here as http://xxx.xxx.xxx.xxx) into the Address area of
the User PC Web browser:
The Login window will appear, similar to the
example shown here, opens. Enter the
assigned User name and Password. The Web
Server Interface default user names and
passwords are as follows:
•
Admin: comtech/comtech
•
Read/Write: opcenter/1234
•
Read Only: monitor/1234
HTTP Login User Access Levels are further defined as follows:
HTTP Login User Access Level
Admin User
Full Access to all
web pages.
Read/Write User
Read Only User
No Access to Admin or IP Packet Processorrelated web pages.
No Access to Admin or IP Packet Processorrelated web pages.
Full Access for all other web pages
View Only Access for all other web pages.
Type the User Name and Password, and then
click [OK].
Once the valid User Name and Password is
accepted, you will see the CDM-625 Web
Server Interface “splash” page, as per the
following example (note that the Base Modem
and optional IP Packet Processor Firmware
Versions listed here are subject to change):
To properly access the CDM-625 Web Server Interface, you must first configure remote control
access for the unit to Ethernet mode. If you attempt to log in to the Web Server Interface and
6–8
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
remote control for the CDM-625 has not been set to Ethernet mode, access is blocked and the
following error message displays in the browser window:
Click [Enable Ethernet Mode] to switch over from your current mode to Ethernet Mode.
Alternately, From the CDM-625 front panel, use the ◄ ► arrow keys to navigate to, and the ▲ ▼
arrow keys to edit, the remote control configuration menu (press ENTER when done):
SELECT: Configuration  Remote  Remote Control=Ethernet
6.5.2
Web Server Interface – Operational Features
6.5.2.1
Navigation
The CDM-625 Web Server Interface features navigation tabs
located at the top of each page. After you click a navigation
tab, you may click an available primary page tab. In turn, any
nested tabs appear for further selection.
This manual uses a naming format for all pages to indicate the depth of navigation needed to
view the subject page: “Top Level Tab | Primary Page Tab | Nested Tab”.
For example: “Admin | Firmware | Base Modem” is interpreted to mean “first click the toplevel ‘Admin’ navigation tab; then, click the ‘Firmware’ primary page tab; finally, click the nested
‘Base Modem’ tab.”
6.5.2.2
Page Sections
Each page features one or more sections. The title at the
upper-left corner of each page or page section describes its
operational features. Each section can feature editable
fields, action buttons, and read-only displays for a specific
function.
This manual explains the purpose and operation for each Web page on a per-page, per-section
basis.
6.5.2.3
Action Buttons
Action buttons are important in the Web Server Interface.
6–9
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
Click an action button to do one of these tasks:
•
Refresh the page with current data.
•
Reset changed parameters to remove unsaved changes.
•
Submit (permanently save) changes.
If you edit a field, make sure to click the action button before you leave the page.
If you go to another page without first clicking the action button, your changes are
not saved.
6.5.2.4
Drop-down Lists
A drop-down list lets you choose from a list of selections.
Left-click the drop-down button to open the list. Then, leftclick on an item to select that choice.
6.5.2.5
Text or Data Entry
Text boxes let you type data into a field. An action button may
be associated with a single text box, or a group of text boxes.
For any text box, left-click anywhere inside the box, type the
desired information into that field, and be sure to press
[ENTER] when done.
Click the related action button to save the data.
If you edit any field, make sure to click the action button before you leave the
page. If you go to another page without first clicking the action button, your
changes are not saved.
6–10
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.3 Web Server Interface – Menu Tree
The CDM-625 Web Server Interface pages in this diagram that are marked with an
asterisk (*) are selectable/operational only when the optional FAST feature is
activated, or when the optional IP Packet Processor card is installed and enabled
and you have logged in with Administrator access privileges. See Sect. 6.5.3.1 for
detailed information about this conditional access.
Pages marked with double asterisks (**) are operable only when the specified
auxiliary products, such as BUCs or LNBs, are installed.
The menu tree diagram (Figure 6-2) lists the features available through the CDM-625 Web Server
(HTTP) Interface. This interface features six navigation tabs (shown in blue). Primary page tabs
(green) and nested page tabs (yellow) provide access to individual Web pages. Click any
navigation tab to continue.
Figure 6-2. CDM-625 Web Server (HTTP) Interface Menu Tree (FW Ver. 2.3.1)
6–11
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.3.1
Revision 15
MN-CDM625
Conditional Access to IP Packet Processor Pages
Carefully review the information in this section.
A significant number of pages in the CDM-625 Web Server Interface address operation of the
CDM-625 when equipped with the optional IP Packet Processor card. These pages are accessible
only when the optional IP Packet Processor card is installed and enabled.
As specified in Sect. 6.5.1, access to these pages is further restricted to “Admin” (Administrator)
users only. If a user with “Read/Write” or “Read Only” access privileges attempts to select any IP
Packet Processor-specific page, access to that page is prohibited and either of the following
error messages may display in the browser window:
-or-
Once logged in, if the Administrator attempts to access any IP Packet Processor-specific page
when the optional IP Packet Processor card is not installed, the following message displays:
Click [Back to previous page] to resume use of the interface.
If the Administrator attempts to access these pages when the optional IP Packet Processor card
is installed but card operation is Disabled, the following message displays:
Click [Back to previous page] to continue any other available operations, or go to the Packet
Processor drop-down list (in the Network Configuration section of the ‘Configuration | LAN | IP’
page) to select its operation as Enabled (the modem will automatically reboot).
6–12
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
The CDM-625 Web Server Interface menu tree diagram (Figure 6-2) indicates those primary and
nested IP Packet Processor pages having conditional access and operation with an asterisk (*).
Further, each interface page subsection (under Sect. 6.5.4 Web Server Page Descriptions)
governed by such restrictions contains an advisory note similar to this example:
These pages are accessible only to Administrators when the optional IP Packet
Processor card is installed and enabled. See Sect. 6.5.3.1 for complete details
about using these conditional access pages.
6.5.4 Web Server Page Descriptions
Access to and availability of certain CDM-625 Web Server Interface pages are
dependent upon the options purchased for operation (e.g., the IP Packet Processor
card) as well as the detected presence of auxiliary equipment (e.g., Block Up
Converters, Low Noise Block Down Converters, Redundancy Switches, etc.), as
installed and configured for use with the CDM-625. Any such operational
restrictions are noted in the subsections that follow through the remainder of this
chapter.
6.5.4.1
Home Pages
Click the Home, Contact, or Support tab to continue.
6.5.4.1.1
Home | Home
Use this page to identify the product and its current operating firmware version. Click the Home
navigation tab and/or the nested page tab to return to this page from anywhere in the Web
Server Interface.
Figure 6-3. CDM-625 Satellite Modem Home page
6–13
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.1.2
Revision 15
MN-CDM625
Home | Contact
Use this page to see the contact information (phone, fax, or Web/e-mail hyperlinks) for
Comtech EF Data Sales or Customer Support.
Figure 6-4. Home | Contact page
6–14
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.1.3
Revision 15
MN-CDM625
Home | Support
For this page to operate correctly, the modem’s administrator is required to
specify the SMTP server, domain name, and destination on the Admin | Access
page (see Sect. 6.5.4.2.1).
This page uses SMTP (Simple Mail Transport Protocol) to compose and send e-mail messages
about the modem to Comtech EF Data Modem Support ([email protected]).
Figure 6-5. Home | Support page
Contact Information
Use this section to provide your contact information to Comtech EF Data when you submit a
Problem Report.
Problem Report
Use this section to compose a message of up to 256 characters maximum to Comtech EF Data.
Be sure to provide your Contact Information, and then click [Submit Email] to send the
message.
6–15
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.2
Revision 15
MN-CDM625
Admin Pages
Use these pages to set up user access, manage the firmware load preferences, and activate FAST
features.
The Admin pages are available only to users who have logged in using the
Administrator Name and Password.
Click the Access, SNMP, Firmware, Reboot, FAST, or Utilities tab to continue.
6.5.4.2.1
Admin | Access
Figure 6-6. Admin | Access page
System Account Access Information
•
Read Only, Read/Write, Admin Names and Passwords – The factory defaults for these user
names and passwords are as follows:
Description
Factory Default User Name / Password
Read Only
monitor / 1234
Read/Write
opcenter / 1234
Admin
comtech / comtech
Typical Parameters
Name and Password fields can be any
alphanumeric combination with a
maximum length of 10 characters.
•
SMTP Server – Specify the mail server IP Address from where e-mail may be sent.
•
SMTP Domain Name / Destination – The Administrator can assign the SMTP Domain Name
and Destination. This is required if the e-mail feature of the ‘Home | Support’ page (Sect.
6.5.4.1.3) is to be used.
o
SMTP Domain Name – Specify the domain of the e-mail server (usually found to the
right of the @ symbol in an e-mail address).
6–16
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
o
Revision 15
MN-CDM625
SMTP Domain Destination – Specify the e-mail recipient name (usually found to the left
of the @ symbol in an e-mail address).
Host Access List
•
IP (#) / Mask – The Host Access List allows you to define which remote clients can connect
when the Access List is Enabled. Each entry allows you to specify an IP Address and a subnet
mask to define a unique class of machines that are allowed access.
For example, if you wanted to grant access to a PC with an IP Address of 10.10.10.1 and any
PC on a subnet of 192.168.10.XXX, and then the Access List would be defined as:
IP 1 / Mask – 10.10.10.1/32
IP 2 / Mask – 192.168.10.0/24
The check box before the IP (#) / Mask must be checked in order for that list
entry to take effect.
•
Access List – The Access List allows you to grant access via HTTP and SNMP to a defined list
of client machines.
Use the drop-down to select Enable or Disable. If Disable is selected, then any client
machine will be able to connect via HTTP and SNMP.
Click [Submit Admin] to save these settings.
6–17
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.2.2
Revision 15
MN-CDM625
Admin | SNMP
•
Chapter 5. FRONT PANEL OPERATION
•
Sect. 6.3 SNMP INTERFACE
The Administrator must use this page to set and return administration information for the
CDM-625 SNMP (Simple Network Management Protocol) feature.
Figure 6-7. Admin | SNMP page
SNMP
•
Simple Network Management – Use the drop-down list to select as Disabled or Enabled.
•
Enable Authentication Trap – Use the drop-down list to select as Disable or Enable.
•
Assign up to two SNMP Trap IP Addresses.
•
Trap Version – Use the drop-down list to select SNMPv1 or SNMPv2.
•
SNMP Read/Write/Trap Community Strings, SNMP Contact/Name/Location – Create or
edit these alphanumeric text strings as follows:
Setting
Factory Default
SNMP Read Community String
public
SNMP Write Community String
private
SNMP Trap Community String
comtech
SNMP Contact
N/A
SNMP Name
N/A
SNMP Location
N/A
Typical Parameters
The Read, Write, and Trap Community Strings
can be any alphanumeric combination with a
maximum length of 4 to 15 characters.
The SNMP Contact, Name, and Location strings
can be any alphanumeric combination with a
maximum length of 0 to 20 characters.
Click [Submit Admin] to save these settings.
6–18
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.2.3
Revision 15
MN-CDM625
Admin | Firmware Pages
Chapter 4. UPDATING FIRMWARE
Click the Base Modem tab, or when the optional IP Packet Processor card is installed, the Packet
Processor tab to continue.
6.5.4.2.3.1 Admin | Firmware | Base Modem
Use this page to view the scrollable, read-only status windows that provide information about
the basic unit’s two loaded and operational firmware images.
Figure 6-8. Admin | Firmware | Base Modem page
Boot
This window identifies the firmware number, version, and release date that is loaded upon
power-up/boot up of the unit.
Image 1 / Image 2
These scrollable windows identify the Firmware numbers, versions, and release dates that
comprise the aggregate image load.
6–19
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
Currently Running (read-only)
The current running image is identified here.
Next Reboot, will use
Use the drop-down list to select Image 1 or Image 2 as the image to use upon next reboot, and
then click [Submit] to save this selection.
6.5.4.2.3.2 Admin | Firmware | Packet Processor
This nested page is accessible only to Administators when the optional IP Packet
Processor card is installed and enabled. See Sect. 6.5.3.1 for complete details
about using conditional access pages.
Use this page to view the status window for the optional IP Packet Processor’s currently loaded
firmware, and to set the firmware load preference for the IP Packet Processor upon powerup/reboot of the unit.
Figure 6-9. Admin | Firmware | Packet Processor page
Firmware
•
(Read-only) The IP Packet Processor’s Bootrom, Image 1, Image 2, and current Running
image are identified here.
•
Boot From – Use the drop-down list to boot the IP Packet Processor from Latest, Image 1, or
Image 2, and then click [Submit] to save this selection.
6–20
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.2.4
Revision 15
MN-CDM625
Admin | Reboot
Use this page to perform a soft reboot of the CDM-625 using the current, active firmware Image
as selected on the ‘Admin | Firmware | Base Modem’ page (Sect. 6.5.4.2.3.1) and/or the
‘Admin | Firmware | Packet Processor’ page (Sect. 6.5.4.2.3.2).
Figure 6-10. Status | Firmware Info | Reboot page
Click [Reboot Now] to perform the soft reboot of the CDM-625. The page updates to indicate
the reboot in progress as follows:
Depending on the number of installed hardware and firmware options, it may take up to one
minute for soft reboot to execute. Once the CDM-625 “splash” screen appears on the front
panel VFD, you must log in to begin a new Web Server Interface session. Do these steps:
1. Click [OK] on the ‘Rebooting’ page to complete the reboot process.
2. Upon reboot, you will need to refresh your browser window. Once the Login window
appears, type in your User name and Password.
3. Click [OK] in the Login window; the browser window will refresh to show the Web Server
Interface “splash” (Home) page.
4. Select any navigation tab to resume your session.
6–21
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.2.5
Revision 15
MN-CDM625
Admin | FAST
•
•
•
Sect. 1.3.8 Fully Accessible System Topology (FAST)
Chapter 5. FRONT PANEL OPERATION
Appendix C. FAST ACTIVATION PROCEDURE
The CDM-625 has a number of optional features that may be activated after the unit’s purchase.
Fully Accessible System Topology (FAST) Access Codes are register-specific authorization codes
that may be purchased from Comtech EF Data, and then activated in the unit using this page.
Contact a Comtech EF Data sales representative during normal business hours, or via e-mail to
[email protected], to order the desired options and obtain your unique FAST Access
Codes.
Figure 6-11. Admin | FAST page
FAST code
When you obtain a FAST access code from Comtech EF Data, it will be for a specific option
register. Carefully enter each register-specific 20-character FAST access code in sequence, and
then click [Submit FAST code] when done. A message will display at the top of this section that
states whether or not the codes are accepted or if the upgrade is successful.
6–22
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
Demo Time Remaining:
FAST Options Demo-Mode allows access to ALL CDM-625 FAST options* for 2592000 seconds
(30 calendar days). This section displays the remaining time in days, hours, and minutes.
* The AES Feature is available only when the CDM-625 is equipped with the
optional IP Packet Processor with AES software.
Use the drop-down list to set Demo-Mode as Enabled or Disabled, and then click [Submit] to
execute the selection.
Equipment ID
This read-only section displays the operational status for a number of FAST-enabled features.
Installed Options
This scrollable, read-only list box displays the installed and presently operational FAST-enabled
features.
Options – Not Installed
This scrollable, read-only list box displays the uninstalled FAST-enabled features that are
available for purchase and activation from Comtech EF Data.
6.5.4.2.6
Admin | Utilities
Use this page to “ping” a device on the network for diagnostic purposes.
Figure 6-12. Admin | Utilities page
Ping
•
IP Address – Enter the IP Address for the network device in the format XXX.XXX.XXX.XXX.
•
Number of Pings (1-20) – Specify the number of ‘ping’ attempts to be executed, from a
minimum of 1 up to a maximum of 20 attempts.
•
Click [Ping] to execute the function. The scrollable window displays the result of the
command.
6–23
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3
Revision 15
MN-CDM625
Configuration Pages
Use the ‘Configuration’ pages to configure all operating parameters for the CDM-625, including
its ODUs (Outdoor Units) when connected. Click the Modem, LAN, Routing, WAN, Overhead,
Utilities, D&I, BUC, or LNB tab to continue.
6.5.4.3.1
Configuration | Modem
Chapter 5. FRONT PANEL OPERATION
Use the ‘Configuration | Modem’ page to configure these modem operating parameters:
• Tx / Rx Interfaces and Framing*
• Carrier-in-Carrier (CnC) Parameters
•
•
Tx / Rx Operating Parameters
ACM Parameters
*The Tx / Rx Interface Types and Framing Modes have higher priority than other
parameters, and should be configured before setting other parameters.
Figure 6-13. Configuration | Modem page
Click [Submit] to save these settings.
6–24
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3.2
Revision 15
MN-CDM625
Configuration | LAN Pages
Click the IP tab, or – when the optional IP Packet Processor card is installed and enabled – the
ARP tab to continue.
6.5.4.3.2.1 Configuration | LAN | IP
Figure 6-14. Configuration | LAN | IP page
Network Configuration
•
Ping Reply – Use the drop-down list to select Ping Reply as Disabled or Enabled. When
Enabled, the modem responds to ICMP ping requests.
•
MAC Address – This parameter is read-only and cannot be changed.
•
WAN Buffer Length – Enter a value between 20ms and 400ms, in 20ms increments.
6–25
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
•
L2 QoS (Layer 2 QoS) – Use the drop-down list to select this feature as Off, VLAN only, Port
only, or VLAN & Port.
L
•
Revision 15
MN-CDM625
L2 QoS can be enabled only when the optional IP Packet Processor is disabled.
Dedicated Management Port – This feature is available in Managed Switch Mode, but it is
unavailable when VLAN Mode is Enabled or when the optional IP Packet Processor is
enabled.
Use the drop-down list to select Port 1, Port 2, Port 3, or Port 4 as the Dedicated
Management Port. If Port 1 (2,3,4) - Local Only is selected, management is restricted to LAN
only. Note that, when the optional IP Packet Processor is Enabled, the drop-down list
displays Disabled as the sole listed option. When VLAN is Enabled, the drop-down list
displays all options as described previously, but the selections are non-functioning.
•
2048 Ethernet Frame Size – This feature is supported only on modems with Hardware
Revision 2.X or higher.
Use the drop-down list to select this feature as Disabled or Enabled.
•
IP Gateway (applicable only in Managed Switch Mode), and Traffic/Mgmt IP Address (and
subnet mask) – Configure the modem’s IP Addresses using these fields.
•
MAC Learning (applicable only in Managed Switch Mode) – Use the drop-down list to select
MAC Learning as On or Off.
•
L3 QoS (Layer 3 QoS) – This feature is operational only when the optional IP Packet
Processor card is installed and enabled.
Use the drop-down list to select the L3 (Advanced) QoS as Off, Max/Priority, Min Max, or
DiffServ.
•
Working Mode – Use the drop-down list to select the Working Mode as follows:
o
Managed Switch – Primarily intended for operation in a point-to-point topology,
Managed Switch Mode is Comtech’s IP modem intelligent networking solution. It allows
a link to be set up with minimal configuration (no specific routes need to be configured).
When the optional IP Packet Processor is either not installed or is installed but
disabled, Managed Switch Mode provides support for Layer 2 QoS, and Dedicated
Management Port or VLAN.
When the optional IP Packet Processor is installed and enabled, advanced features are
available, such as Layer 3 (Advanced) QoS, Header and Payload Compression, Streamline
Encapsulation (SLE), and Encryption. Most are supported only under “Admin” user
access.
6–26
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
Sect. 6.5.4.3.4 Configuration | Managed Switch
•
o
Router Point-to-Point – Functions as a point-to-point router in Point-to-Point
configurations.
o
Router Multipoint Hub – Functions as the Hub side router in a Point-to-Multipoint
network. Allows Satellite-to-Satellite packets to pass.
o
Router Multipoint Remote – Functions as a Remote Router in a Point-to-Multipoint
network. Packets from the WAN are not allowed to be sent to the WAN.
Packet Processor – This feature is operational only when the optional IP Packet Processor
card is installed. Use the drop-down list to select the IP Packet Processor card as Enabled or
Disabled.
When you change the optional IP Packet Processor card operation (i.e.,
Enabled or Disabled), after you click the [Submit] tab the modem is forced to
reboot and you will see the following message:
Note that, before clicking [OK] to proceed with reboot of the modem, you may
first need to clear the PC’s ARP table.
Click [Submit] to save these settings.
Per Port Configuration
Set the parameters on a per-port basis (Port 1 through Port 4). Note the following:
Column
Description
Speed
Use the drop-down list to select the speed for each selected port: Auto, 100 Full, 100 Half,
10 Full, or 10 Half.
Pause Flow Control
Use the drop-down list to select Pause Flow Control for the port as Off or On.
Port Mode
Use the drop-down list to select Port Mode for the port as Access or Trunk.
PVID
When Port Mode is Access, a PVID (Native VLAN ID) may be assigned to the selected
port using a value range of 0001-4095. (See note about PVIDs (Native VLAN IDs) vs.
Management VLAN IDs.)
Priority
Use the drop-down list to set the operational priority of the selected port, in the order of
preference (from 1 to 4).
Actual Negotiated
Port Speed
This is the status of the current operating actual speed and duplex. If the port is not
connected, and then “Link Down” is displayed.
Click [Submit Port Cnfg] to save these settings.
6–27
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
VLAN Mode
VLAN Mode is supported in Managed Switch Mode, with or without the optional IP
Packet Processor enabled.
•
VLAN Mode – Use the drop-down list to select the mode as Disabled or Enabled.
•
Management VLAN ID – A Management VLAN ID may be assigned to the selected port using
a value range from 0001 to 4095.
When configuring Access and Management VLAN IDs:
•
The Access VLAN ID (PVID) is used to tag arriving packets that have no
VLAN tag. Likewise, when packets arrive from the WAN with the same
VLAN tag as the Access VLAN ID, and then the VLAN header is removed
and passed to the LAN interface.
•
The Management VLAN ID is used to specify a dedicated management
VLAN used to access and control the modems.
Click [Submit] to save these settings.
VLAN Table
•
VLAN Entry / Action – Set the table entry action as None, Edit, Delete, or Add:
o
None – No actions will be taken on the VLAN priority rule for the selected VLAN ID.
o
Edit – Click to modify an existing VLAN priority rule in the VLAN table. The VLAN rule will
be updated in the VLAN Table once you click [Submit].
o
Delete – Click to flag a VLAN priority rule for removal from the VLAN Table. The VLAN
rule will be deleted from the VLAN Table once you click [Submit].
o
Add – Click to add a VLAN priority rule. The entry will be added to the VLAN Table for
processing once you click [Submit].
•
VLAN ID – This parameter is read-only and reflect the ID value assigned in the Per Port
Configuration section of this page (i.e., any ID has a value range of 0001-4095).
•
Port 1 through Port 4 – Use the drop-down list to select the port as Untagged, Tagged, or
Filtered.
•
Action – Use the drop-down list to select the action for this active ID as None, Edit, Delete,
or Add.
Click [Submit] to save these settings.
6–28
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
•
Revision 15
MN-CDM625
VLAN Table – This read-only table provides you with the status for VLAN entry on a per-ID
(0001-4095) and per-Port (1-4) basis, where U=Untagged, T=Tagged, and F=Filtered.
6.5.4.3.2.2 Configuration | LAN | ARP
This nested page is accessible only to Administrators when the optional IP Packet
Processor card is installed and enabled. See Sect. 6.5.3.1 for complete details
about using conditional access pages.
ARP (Address Resolution Protocol) is a technique by which the Web Server Interface in Router
Mode on a given network answers the ARP queries for a network address that is not on this
network, but is reachable via the IP Packet Processor Interface.
Use this page to configure the modem’s ARP parameters.
Figure 6-15. Configuration | LAN | ARP page
ARP Table (Edit)
This section displays all current Static and Dynamic ARP entries, and allows you to directly edit
the current Static ARP entries, when more than one ARP entry exists. Note the following:
Column
Description
Index
This is the internal table index that is automatically assigned and cannot be edited.
IP
IP Address, in the format XXX.XXX.XXX.XXX.
MAC
MAC Address, in the format YY:YY:YY:YY:YY:YY.
Type
Type is identifiable as Static or Dynamic (cannot be edited).
Click [Submit Changes] to save these settings.
6–29
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
Add Static ARP
This section allows you to directly add a static ARP entry. Note that the index will automatically
increment to the next available number.
Click [Add Entry] to save these settings.
Delete Static ARP
Enter Entry Index to Delete, and then click [Delete Entry] once all changes have been made in
this section.
Flush Dynamic ARPs
Click [Flush ARP Table] to delete all dynamically learned ARP entries.
6–30
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3.3
Revision 15
MN-CDM625
Configuration | Routing Pages
The nested Routes, IGMP, and DHCP pages are accessible only to Administrators
when the optional IP Packet Processor card is installed and enabled. See Sect.
6.5.3.1 for complete details about using conditional access pages.
Click the Routes, IGMP, DHCP, or DNS tab to continue.
6.5.4.3.3.1 Configuration | Routing | Routes
Use this page to enter static routes into the IP Packet Processor to route IP traffic over the
satellite or to another device on the local LAN.
Figure 6-16. Configuration | Routing | Routes page
Route Table (Edit)
This section displays and allows you to edit all current Route Table entries. Note the following:
Column
Description
Index
This is the internal table index that is automatically assigned and cannot be edited.
Desc.
This label helps to maintain the network. Enter a label string in this text box. The assigned
name must be unique and cannot contain any whitespace.
Dest.IP/Mask
Enter a Destination IP Address/Mask in the form XXX.XXX.XXX.XXX/YY.
Interf.
Use the drop-down list to select the Interface as toWAN or toLAN.
Next HOP IP
Enter the desired Next Hop IP Address for toLAN routes. Note that no Next Hop entry is
needed for toWAN routes.
6–31
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
Column
Description
Header Comp.
When the optional Header Compression FAST feature is available, use the drop-down list to
Disable or Enable operations.
Payload Comp.
When the optional Payload Compression FAST feature is available, use the drop-down list to
Disable or Enable operations.
Encryption
When the optional AES Encryption FAST feature is available, use the drop-down list to
Disable or Enable operations.
With AES Encryption disabled, all routed traffic is transmitted ‘in the
clear’ regardless of the Encryption Key specified in the Route Table.
Encryption
Key
With encryption enabled, use the drop-down list to select Key 1 through Key 8 (assigned
using the ‘Configuration | WAN | Encryption’ page, Sect. 6.5.4.3.5.3) or Random Key.
You must program all eight encryption and decryption keys before
selecting Random Key – otherwise, the modem will select any of the eight
allotted keys, even if a key is currently clear (set to all zeroes).
Click [Submit Changes] to save these settings.
Add New Route
This section allows you to directly add a route entry using text boxes and drop-down lists as
described previously for the Route Table (Edit) section.
Click [Add Entry] to save these settings. Note that, when a new route is added, the index
automatically increments to the next available number.
Delete Route
Enter Route Index to Delete, and then click [Delete Entry] once all changes have been made in
this section. The specified route entry will then be deleted from the route table.
6–32
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.3.3.2 Configuration | Routing | IGMP
This page permits use of Internet Group Management Protocol (IGMP) with configured multicast
routes.
IGMP, when enabled, responds to IGMP queries for the configured multicast routes on the
transmit side and generates IGMP queries on the receive side. If there are no active IGMP
receivers on the LAN, it will stop forwarding the multicast traffic (received from the satellite) to
the LAN.
Figure 6-17. Configuration | Routing | IGMP page
IGMP Multicast Router
•
Version – Use the drop-down list to select IGMPv1, IGMPv2, or IGMPv3.
•
Last Member Query Interval – This is the maximum response time inserted into groupspecific queries that are set in response to Leave Group messages, and is also amount of
time between group-specific query messages. This value may be tuned to modify the "leave
latency" of the network; a reduced value results in reduced time to detect the loss of the
last member of a group.
Enter a value, in seconds, from 1 to 25 (default = 1 second).
•
Query Interval – This is the interval between general queries sent by the modem. By varying
the query interval, a modem administrator may tune the number of IGMP messages on the
subnet; note that larger numbers cause the IGMP queries to be sent less often.
6–33
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
Enter a value, in seconds, from 1 to 18000 (default = 125 seconds)
•
Query Response Interval – This is the maximum response time inserted into the periodic
general queries. By varying the Query Response Interval, a modem administrator may tune
the “burstiness” of IGMP messages on the subnet; note that larger values make the traffic
less “bursty” as host responses are spread out over a large interval.
Enter a value, in seconds, from 1 to 25 (default = 10 seconds).
The number of seconds assigned to the Query Response Interval must be less
than the Query Interval.
Click [Submit] to save these settings.
IGMP Joined Groups
This read-only table lists the IGMP Groups that are active on the modem. This allows you to
determine which services are being used and the minimum time before a service will be
terminated.
Click [Refresh] to update this section with its latest available statistics.
Multicast Routes
This read-only table lists the Multicast Routes that are active on the modem.
Click [Refresh] to update this section with its latest available statistics.
6–34
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.3.3.3 Configuration | Routing | DHCP
Use this page to set up the DHCP (Dynamic Host Configuration Protocol) Relay feature.
DHCP allows a device to be configured automatically – eliminating the need for intervention by a
network administrator – and provides a server located at the hub for keeping track of devices
that are connected to the network. This prevents two devices from accidentally being
configured with the same IP Address.
The CDM-625 DHCP Relay feature allows you to deploy a single DHCP server at the hub that
manages all of the devices throughout your remote networks. When a device on the CDM-625's
network issues a DHCP request, it is relayed to the DHCP server as specified by the "DHCP Server
IP Address". The DHCP response is then sent directly to the requesting device.
Figure 6-18. Configuration | Routing | DHCP page
DHCP Relay
•
Relay Feature – Use the drop-down list to Disable or Enable the DHCP Relay Feature.
•
DHCP Server IP Address – Specify the IP Address to be used for the DHCP server at the hub
in the form XXX.XXX.XXX.XXX.
Click [Submit] to save these settings.
6–35
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.3.3.4 Configuration | Routing | DNS
Use this page to manage DNS (Domain Name System) caching. DNS caching provides an efficient
way for DNS to keep the Internet synchronized as the IP addresses of some servers change and
as new servers come online.
Figure 6-19. Configuration | Routing | DNS page
DNS Caching
Use the drop-down list to set DNS as Enabled or Disabled. Click [Submit] to save.
DNS Cache Flush
Click [Flush] to clear the DNS Cache of all data.
6–36
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3.4
Revision 15
MN-CDM625
Configuration | Managed Switch
The features on this nested page are accessible only the Adminstrator and when
the optional IP Packet Processor card is installed and enabled. See Sect. 6.5.3.1 for
complete details about using conditional access pages.
For configuration of Managed Switch Mode features that do not require the
presence or enabling of the optional IP Packet Processor (i.e., L2 QoS, Dedicated
Management Port, VLAN Mode), see Sect. 6.5.4.3.2.1 Configuration | LAN | IP.
Managed Switch Mode is primarily intended for operation in a point-to-point topology. It
supports VLAN as well as advanced features such as QoS, Header Compression, Payload
Compression, and Encryption/Decryption.
Figure 6-20. Configuration | Managed Switch page
Managed Switch Configuration
•
Header Compression – When this optional feature is available, use the drop-down list select
Header Compression as Disable, L2 Enabled, or L2/L3 Enabled.
Click [Save] to save this setting.
•
Payload Compression – When this optional feature is available, use the drop-down list to
Disable or Enable Payload Compression.
Click [Save] to save these settings.
•
Encryption – When this optional feature is available , use the drop-down list to Disable or
Enable Encryption.
•
Encryption Key – When this optional feature is available and encryption has been Enabled,
the Encryption keys are used to encrypt traffic being sent over the satellite interface:
6–37
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
o
Select Key 1 through Key 8 to use the key specified in the Encryption/Decryption
Configuration Page (Sect. 6.5.4.3.5.3) to encrypt WAN traffic.
o
Select Disable to force the IP Module to not encrypt any WAN traffic.
o
Select Random to cause the IP Module to randomly use any of the eight Tx Keys to
encrypt the traffic destined for the satellite link.
Click [Save] to save these settings.
6–38
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3.5
Revision 15
MN-CDM625
Configuration | WAN Pages
The nested QoS, Compression, and Encryption pages are accessible only to the
Adminstrator when the optional IP Packet Processor card is installed and enabled.
See Sect. 6.5.3.1 for complete details about using conditional access pages.
Click the QoS, Compression, or Encryption tab to continue.
6.5.4.3.5.1 Configuration | WAN | QoS Pages
The ‘Configuration | WAN | QoS’ page is viewable only when QoS is enabled for operation.
With QoS disabled, if the nested QoS tab is selected, in place of a ‘populated’ page the following
message appears:
With QoS enabled, the appearance of this page depends on the active mode of operation. The
active mode is labeled in the upper left-hand page corners, below the nested QoS tab:
•
Max/Priority Mode or Min/Max Mode (see Figure 6-21)
•
DiffServ Mode (see Figure 6-22)
The label for each page is appended with the following message:
Note that IP is a hyperlink providing direct navigation to this configuration page.
Segmentation and Reassembly (SAR)
This section is identical for the “Max/Priority,” “Min/Max,” and “DiffServ” pages.
Packet Segmentation and Reassembly (SAR) is an adaptive process; it will trigger only if the
packet latency exceeds the threshold value (default to 25 msec). SAR is needed, when running
small-speed (<700 kbps) links, to keep latency and jitter within specifications (25 msec
latency/10 msec jitter) when the lower priority queue contains large packets.
Use the drop-down list to select SAR as Disable or Enable, and then click [Submit].
6–39
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3.5.1.1
Revision 15
MN-CDM625
Configuration | WAN | QoS Pages – Max/Priority, Min/Max
Modes
(Top) QoS Control Mode = Max/Priority
(Bottom) QoS Control Mode = Min/Max (Banner, Menu Bar not shown)
Figure 6-21. Configuration | WAN | QoS Pages
6–40
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
QoS Rules Table
For the ‘Max/Priority’ page:
For the ‘Min/Max’ page:
This section displays all existing QoS Rules Table entries. From left to right:
Column
Description
Index
This is the internal table index that is automatically assigned and cannot be edited.
Protocol
Specifies the protocol for the specific rule.
VLAN Range
Specifies the minimum-to-maximum range of VLAN IDs (applicable only in Managed Switch
Mode)
TOS
Specifies the Type Of Service
Src IP/Mask
Identifies the Source IP Address/Mask in the form XXX.XXX.XXX.XXX/YY.
Dst IP/Mask
Identifies the Destination IP Address/Mask in the form XXX.XXX.XXX.XXX/YY.
Min Src Port
Specifies the Minimum Source Port.
Max Src Port
Specifies the Maximum Source Port.
Min Dst Port
Specifies the Minimum Destination Port.
Max Dst Port
Specifies the Maximum Destination Port.
Min BW (Kbps)
(“Min/Max” page only) Specifies the minimum bandwidth value.
Max BW (Kbps)
Specifies the maximum bandwidth value.
Priority
(“Max/Priority” page only) Specifies the priority established for the specific rule.
WRED
Specifies the WRED (Weighted Random Early Detection) setting for the specific rule as Disable
or Enable.
Filter All
Specifies the flow filter setting for the specific rule as Disable or Enable.
Add New QoS Rule
This section allows you to directly add a new rule entry. Note that the index will automatically
increment to the next available number.
For the “Max/Priority” page:
6–41
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
For the “Min/Max” page:
From left to right:
Column
Description
Protocol
Use the drop-down list to select the Protocol as UDP, TCP, ICMP, RTP, VOICE, VIDEO,
RTPS, FTP, HTTP, TELNET, SMTP, SNMP, All-IP, Non-IP, or All.
VLAN Range
Enter the minimum-to-maximum range of VLAN IDs from 0-4094 (applicable only in
Managed Switch Mode).
TOS
Enter the Type of Service.
Src IP/Mask
Enter a Source IP Address/Mask in the form XXX.XXX.XXX.XXX/YY.
Dst IP/Mask
Enter a Destination IP Address/Mask in the form XXX.XXX.XXX.XXX/YY.
Min/Max Src Port
Selection of Source/Destination Ports should only be done if you are aware of the
port usage of the desired protocol or application. There are well-known ports for
various protocols, but often only the ‘command’ messaging is transacted on these ports
and the ‘data’ is transferred through a negotiated port.
Min/Max Dst Port
Min BW (Kbps)
(“Min/Max” page only) Assign a value to a flow to restrict the Minimum Bandwidth that
any particular flow will utilize; otherwise, the default of no bandwidth restriction can be
selected.
Max BW (Kbps)
Assign a value to a flow to restrict the Maximum Bandwidth that any particular flow will
utilize; otherwise, the default of no bandwidth restriction can be selected.
Priority
(“Max/Priority” page only) Use the drop-down list to assign a Priority Level from 1 to 8
for each flow:
•
The IP Module classifies each packet that is to be forwarded over the satellite; the
packet then has a Priority assigned according to the defined QoS Rules;
•
Any latency critical traffic such as VoIP/RTP should always be assigned Priority 1;
•
Priority 1 packets are forwarded immediately; Priority 2 packets are forwarded as
soon as there are no Priority 1 packets in the Queue; and so on;
•
Any packet that does not meet a QoS Rule is assigned to the Default Rule and is
assigned a Priority of 9.
WRED
Use the drop-down list to set WRED (Weighted Random Early Detection) as Disable or
Enable.
Filter All
Use the drop-down list to set Filter All to Disable or Enable. QoS allows specific flows to
be designated as ‘filtered’ so the IP Packet Processor card will discard traffic that you do
not want to forward over a satellite link.
For either page, click [Add Rule] to execute the addition of the new rule to the QoS Rules Table.
6–42
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
Delete Rule
This section is identical for both the “Max/Priority” and “Min/Max” pages.
Enter Rule Index to Delete, and then click [Delete Rule] to execute deletion of the specified rule
from the QoS Rules Table.
Delete All (Max/Pri, Min/Max) QoS Rules – Use With Caution
For the ‘Max/Priority’ page:
For the ‘Min/Max’ page:
For either page, use the drop-down list to select Yes, and then click [Submit] to execute the
deletion of all rules from the QoS Rules Table.
6–43
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3.5.1.2
Revision 15
MN-CDM625
Configuration | WAN | QoS Pages – DiffServ Mode
QoS can be set to DiffServ Mode to make it fully compliant to the Differentiated Services QoS
RFC (Request For Comments) standards.
Figure 6-22. Configuration | WAN | QoS page (DiffServ Mode)
Differentiated Services
From left to right, note the following:
Column
Description
Priority
IP traffic is prioritized based upon the DSCP (DiffServ Code Points) Class Selector
Precedence.
Per-Hop Behavior (PHB)
Traffic class that determines how packets will be forwarded.
Codepoint (DSCP)
Codepoint value in Type of Service (ToS) byte in IP header.
6–44
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
You have the option of configuring each queue to one of the following attributes (the acceptable
ranges are shown in brackets):
Column
Description
Service Rate
[ -0.000 / (Tx Data Rate)] The minimum bandwidth will be served first among the
Assured Forwarding (ASFD) classes in case of bandwidth availability once Class
Selector 7 through Class Selected 1 have been serviced.
Drop Preferences
ASFD Class 4 through 1 Code Points (b100xx0, b011xx0, b010xx0, and b001xx0)
carry the drop precedence value (xx). In case of network congestion, a Weighted
Random Early Detection (WRED) congestion avoidance algorithm is imposed on
these queues to drop the packets randomly rather than ‘tail drop.’
•
Low Drop Precedence (% full) [0–100] – In case of congestion, the WRED
is applied after the queue depth exceeds the configured percentage value
assigned for the Drop Precedence value b001.
•
Med. Drop Precedence (% full) [0–99] – In case of congestion, the WRED
is applied after the queue depth exceeds the configured percentage value
assigned for the Drop Precedence value b010.
•
High Drop Precedence (% full)) [0–99] – In case of congestion, the WRED
is applied after the queue depth exceeds the configured percentage value
assigned for the Drop Precedence value b011.
Click [Submit] to save these settings.
6–45
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.3.5.2 Configuration | WAN | Compression
Use this page to configure the optional Payload and Header Compression, when this FAST
feature is enabled.
Figure 6-23. Configuration | WAN | Compression page
Compression Availability
This section provides a hyperlink to the ‘Configuration | Managed Switch’ page (see Sect.
6.5.4.3.4). Use this “Managed Switch” link to enable Header and Payload Compression.
Header Compression
•
Header Comp. RTP Refresh Rate – Enter a time for the Real Time Protocol refresh rate, from
1 to 600 seconds.
•
Header Comp. UDP Refresh Rate – Enter a time for the User Datagram Protocol refresh
rate, from 1 to 600 seconds.
•
Header comp. Default Refresh Rate – Enter a time for the Default Protocol refresh rate,
from 1 to 600 seconds.
Click [Submit] to save these settings.
Payload Compression
•
Payload Comp. Refresh Rate – Enter for the Payload Compression refresh rate, in number of
packets, from 1 to 255.
6–46
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.3.5.3 Configuration | WAN | Encryption
This page allows configuration of the optional AES Encryption, when this FAST feature is
enabled. When AES Encryption is active and enabled on a WAN route, the IP Packet Processor
will encrypt all outgoing traffic on the WAN, and decrypt any encrypted traffic it receives.
Figure 6-24. Configuration | WAN | Encryption page
Encryption Status Section
This section displays the active state of the AES Encryption option:
•
Per the example shown in Figure 6-24, when the AES Encryption FAST feature is enabled,
this section displays the message “Encryption is available.” All functionality of this page is
operable – you can encrypt a specific route.
6–47
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
Route encryption is set using the ‘Configuration | Routing | Routes’ page (see Sect.
6.5.4.3.3.1) when the modem is in a router mode, or the ‘Configuration | Managed Switch’
page (see Sect. 6.5.4.3.4) when the modem is in Managed Switch Mode.
•
When the AES Encryption FAST feature has not been purchased and is therefore disabled,
the Encryption section of this page appears as follows:
While the AES Encryption FAST feature itself is disabled, the this page may still be used to
program the Encryption and Decryption keys in anticipation of future use.
FAST features may be purchased from Comtech EF Data Sales Representatives
during normal business hours. See Sect. 5.2.8 SELECT: FAST Menus or Appendix C.
FAST ACTIVATION PROCEDURE in this manual for addtional information about
activating FAST features.
For situations where, for example, export restrictions prohibit the availability of the AES
Encryption option, the CDM-625 runs an FPGA chipset that does not allow encryption
operations. The ‘Configuration | WAN | Encryption’ page is therefore disabled: The page, when
accessed, notes the operational restriction by hiding the Encryption Key and Decryption Key
programming sections and displaying the following message in the Encryption section:
Encryption – Unencrypted Rx Traffic
Use the drop-down list to select Allow (default) or Drop. Note the following:
•
Under the default Allow setting, the local modem allows receipt of unencrypted (plain text)
packets from the remote modem over the WAN, even when encryption is enabled.
•
Under the Drop setting, the modem drops all unencrypted traffic received over the WAN
interface when encryption is enabled. The remote modem may therefore transmit only
encrypted data.
Encryption / Decryption Keys
A typical encryption or decryption key consists of a string of 32 characters, using any
combination of the numbers ‘0’ through ‘9’ and the letters ‘a’ through ‘f’ / ‘A’ through ‘F’.
To program a key, enter the desired 32-character string in the appropriate key row, and then
click [Set]. Any previously programmed key may be overwritten in this manner.
Alternately, click [Clear] to reset a previously programmed entry to all zeroes, and then re-enter
the new key string as instructed here.
6–48
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
Up to eight keys may be programmed for each function; once set, a specified Encryption Key
may then be selected for active use via the ‘Configuration | Routing | Routes’ page (Sect.
6.5.4.3.3.1).
You must program all eight encryption and decryption keys before selecting
Random Key operation on the ‘Configuration | Routing | Routes’ page. Otherwise,
the modem will select any of the eight allotted keys, even if a key is currently clear
(set to all zeroes).
6.5.4.3.6
Configuration | Overhead
This page appearance is dependent on whether Carrier-in-Carrier Automatic Power
Control (CnC-APC) Mode is selected.
(Top) Page when CnC-APC mode is not selected
(Bottom) Page with CnC-APC mode selected (Banner, Menu Bar not shown)
Figure 6-25. Configuration | Overhead page
6–49
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
Chapter 5. FRONT PANEL OPERATION
Use this page to configure the following overhead interfaces:
•
ESC including Tx / Rx IDR Esc Type, Audio Volume, High Rate ESC
•
IDR Backward Alarms for Tx 1-4 and Rx 1-4
•
AUPC (when Carrier-in-Carrier Automatic Power Control is disabled/de-activated)
•
CnC-APC (when Carrier-in-Carrier Automatic Power Control is enabled/activated)
See Sect. 10.6 Carrier-in-Carrier Automatic Power Control (CnC-APC) in
Chapter 10. DOUBLETALK CARRIER-IN-CARRIER OPTION for complete details
about, and setup of, the CnC-APC feature.
•
EDMAC Framing Mode and Slave Address
Click [Submit] to save these settings.
6–50
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3.7
Revision 15
MN-CDM625
Configuration | Utilities
Use this page to configure a number of the CDM-625’s utility functions.
Figure 6-26. Configuration | Utilities page
Redundancy
If the unit is part of a 1:1 redundant pair of modems, and this unit is currently online, click
[Force 1:1 Switch] to cause the unit to switch to standby.
Re-Center Buffer
Click [Re-Center Buffer] to force the re-centering of the Plesiochronous/Doppler buffer.
Unit
Use the drop-down lists provided in this section to configure Test Mode, Stats Sample Interval,
Front Panel Lockout, RTS/CTS Control, and HSSI Handshake Control.
Click [Submit Unit Utilities] to save these settings.
6–51
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
Clocks
Use the drop-down lists provided in this section to configure Tx / Rx Clock Sources, Rx Buffer
Size, External Clock, External Frequency Reference, and G.703 Clock Extended Mode /
Interface.
Click [Submit Clocks] to save these settings.
Circuit and Carrier ID
It is IMPORTANT to understand that Carrier ID and Circuit ID, while named similarly,
are two distinct features of the CDM-625. Read your documentation carefully.
With Carrier ID enabled, the first 24 characters of the 40-character Circuit ID are
intended for and sent as the MetaCarrier Custom Message. While you must limit
your MetaCarrier Custom Message to 24 characters or less, the full 40 characters of
the Circuit ID will display on the front panel screen saver (see Sect. 5.1.3.1 Screen
Saver).
Chapter 19. CARRIER ID (MetaCarrier®)
•
Circuit ID – Enter a Circuit ID string of
up to 40 characters, or a MetaCarrier
Custom Message of 24 characters or
less.
You may use the following characters to compose either string:
[Space] ( ) * + - , . / 0-9 and A-Z.
The Circuit ID / MetaCarrier Custom Message, as created here, also appears in the title bar
of compatible web browsers for easy unit identification.
•
Carrier ID – Use the drop-down list to
set Carrier ID operation as Disabled or
Enabled.
Click [Submit] to save these settings.
Date and Time
•
Enter a date using DD/MM/YY format
(where DD = day [01 to 31], MM = month [01 to 12], and YY = year [00 to 99]).
•
Enter a time using HH:MM:SS format
(where HH = hour [00 to 23], MM = minutes [00 to 59], and SS = seconds [00 to 59]).
Click [Enter Date/Time] once you set the desired date and time.
6–52
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
BERT Config
Use the drop-down lists provided in this section to configure Bit Error Rate Test for Tx or Rx as
On or Off; configure the pattern for Tx or Rx; and set Error Insertion as either Off or 10E-3.
Click [Submit BERT] once you select the desired BERT settings.
BERT Monitor
This read-only section displays the ongoing BERT. Click [Restart] to restart the BERT Monitor, or
[Update] to refresh a test already in progress.
Save / Load (Save takes precedence over Load)
The Save/Load feature stores and retrieves the CDM-625 Base Modem settings
only. It does not include the optional IP Packet Processor settings.
As a safeguard, to prevent any inadvertent action the Save Location and Load Location dropdown lists’ default selections are Don’t Save and Don’t Load, respectively. Otherwise:
•
Save Location / Load Location – Use the drop-down lists to save or load up to 10 different
modem configurations – 0 through 9. An empty location is noted on its menu line as
Available.
Click [Submit Save/Load] to save these settings.
6–53
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3.8
Revision 15
MN-CDM625
Configuration | D&I (Drop and Insert)
•
•
For D&I configuration information: Chapter 5. FRONT PANEL OPERATION
For D&I functionality overview: Chapter 9. CLOCK MODES AND DROP AND
INSERT (D&I).
Figure 6-27. Configuration | D&I page (Selected Framing Mode = D&I)
The appearance of this page is dependent on the framing mode selected on the ‘Configuration |
Modem’ page (Sect. 6.5.4.3.1). If the selected framing mode is D&I++, the section heading and
the available parameters adjust accordingly:
If the selected framing mode is Quad Drop & Insert, the section heading and the available
parameters adjust accordingly:
Click [Submit] to save these settings.
6–54
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3.9
Revision 15
MN-CDM625
Configuration | BUC (Block Up Converter)
Appendix F. CDM-625 ODU (TRANSCEIVER, BUC, LNB) OPERATION
After configuring the CDM-625 for L-Band operation, and when a Block Up Converter (BUC) is
installed, you may use this page to configure its operating parameters and to view the BUC
operational status.
Figure 6-28. Configuration | BUC page
6.5.4.3.10
Configuration | LNB (Low Noise Block Down Converter)
Appendix F. CDM-625 ODU (TRANSCEIVER, BUC, LNB) OPERATION
After configuring the CDM-625 for L-Band operation, and when a Low Noise Block Down
Converter (LNB) is installed, you may use this page to configure its operating parameters and to
view the LNB operational status.
Figure 6-29. Configuration | LNB page
6–55
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3.11
Revision 15
MN-CDM625
Configuration | ANT (Advanced Network Timing) Pages
Sect. 16.7 Advanced Network Timing (ANT) (Chapter 16. ETHERNET NETWORK
CONFIGURATION)
The ANT feature provides IP-based protocols to synchronize the modem's internal time-of-day
clock to an external device such as a time server, Base Station Controller (BSC), or Radio
Network Controller (RNC).
Select the PTP or SNTP tab to continue.
6.5.4.3.11.1
Configuration | ANT | PTP (Precision Time Protocol)
Sect. 16.7.3 PTP (Precision Time Protocol) (Chapter 16. ETHERNET NETWORK
CONFIGURATION)
If the optional IP Packet Processor card is installed and enabled, then the
‘Configuration | ANT | PTP menu, while selectable, are not functional.
All network devices between the Grandmaster and Slave devices must support PTP
for sub-microsecond accuracy.
PTP (Precision Time Protocol) is a FAST-activated feature used to synchronize computer clocks
throughout a computer network. On LANs, PTP achieves clock accuracy in the sub-microsecond
range – much more accurate than what is attainable by NTP (Network Time Protocol) – and it is
also used in network applications where GPS is either unaffordable or inaccessible.
Figure 6-30. Configuration | ANT | PTP page
PTP
•
Feature – Use the drop-down list to set PTP operation as Enabled or Disabled.
If Enabled, PTP is used to establish independent Wireless Receiver/Transmitter (WRT)
protocol segments – one for LAN and the other for WAN. If Disabled, by default the
6–56
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
availability of the PTP protocol is dependent on the near-end (e.g., the RNC/BSC) and
distant-end (e.g., the BTS) IEEE 1588v2 (PTP) capable network devices in the network.
•
Grandmaster – Use the drop-down list to assign to which side (either the LAN port or the
WAN port) the PTP Grandmaster is connected. Note the following:
Selection
Function
LAN
The LAN port receives messages from the PTP master.
WAN
The WAN port receives messages from the PTP master.
Click [Submit] to save these settings.
Status
Click [Refresh] to update this section with its most recently accumulated statistics.
These status parameters are read-only and cannot be changed. Note the following:
Row
Top
Title
Description
PTP Engine
Specifies whether or not PTP is actively attempting to synchronize time.
PTP Time
Displays the time that has been synchronized with the master device and is being
propagated to the slave devices.
PTP Port
Displays whether or not the Ethernet link is detected. The PTP Port is always
Ethernet Port 2 on the modem.
RTV Time
Displays the presumed time for the modem. While the PTP time depends on the
Grandmaster device, the RTC Time changes only when set by the user.
Bottom
6–57
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3.11.2
Revision 15
MN-CDM625
Configuration | ANT | SNTP (Simple Network Timing Protocol)
Sect. 16.7.2 Simple Network Timing Protocol (SNTP) (Chapter 16. ETHERNET
NETWORK CONFIGURATION)
Simple Network Time Protocol (SNTP) is used to synchronize computer clocks throughout a
computer network when the ultimate performance of the full NTP implementation as per
RFC-1305 (Requests for Comment No. 1305: Network Time Protocol, Version 3, Specification,
Implementation and Analysis) is not needed or justified.
Figure 6-31. Configuration | ANT | SNTP page
SNTP
•
Primary / Backup Ethernet Time Server – Enter the desired Time Server’s IP Address in the
form XXX.XXX.XXX.XXX.
•
Last Update – This read-only field displays the time and date that the selected server was
last updated. The time in shown military format (HH:MM:SS); the date is shown in DAYMONTH-YEAR format in accordance with European convention. This line specifies “Never” if
no update information exists.
•
Feature – Use the drop-down list to select SNTP as Disabled or Enabled.
Click [Submit] to save these settings.
Date and Time
•
Enter a time using HH:MM:SS format
(where HH = hour [00 to 23], MM = minutes [00 to 59], and SS = seconds [00 to 59]).
•
Enter a date using DD/MM/YY format
(where DD = day [01 to 31], MM = month [01 to 12], and YY = year [00 to 99]).
Click [Enter Date/Time] once you set the desired date and time.
6–58
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.3.12
Revision 15
MN-CDM625
Configuration | MEO (Mid-Earth Orbit)
MEO is non-functional when the optional CnC card is installed.
Figure 6-32. Configuration | ANT | SNTP page
CDM-625 modems are configurable for continuous pairing as Primary and non-Primary Modems
in an Antenna Handover System when the MEO (Medium Earth Orbit) feature is enabled.
Ethernet data traffic is transmitted and received via the Primary and Non-Primary CDM-625’s
four 10/100 Ethernet ports. The Antenna Handover signal received from the user-supplied IF/RF
switch determines which modem is the ONLINE or OFFLINE unit:
•
The ONLINE unit transmits traffic only to the WAN side while, at the same time, the OFFLINE
unit’s Tx is muted.
•
Both the ONLINE and OFFLINE units receive the satellite traffic, but only the ONLINE unit
forwards traffic to the LAN side while the OFFLINE unit drops the packets.
•
Any time a unit switches from the OFFLINE to ONLINE state, the traffic destined for the WAN
is buffered, preconfigured in milliseconds (base modem → Antenna Handover delay).
MEO
Use the drop-down list to select the MEO Feature operation as Disabled or Enabled. Click
[Submit] to save this setting.
Antenna Handover
•
Feature – Use the drop-down list to select the Antenna Handover Feature operation as
Disabled or Enabled.
•
Mode – Use the drop-down list to select the enabled Antenna Handover Feature switching
operation as Manual or Automatic.
•
Differential Path Delay – Enter a DPD limit value from -30 to +30.
Click [Submit] to save these settings.
6–59
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.4
Revision 15
MN-CDM625
Status Pages
The Status pages provide you with status, event logging, and operational statistics windows.
Click the Modem Status, Modem Logs, Modem Info, Traffic Statistics, or – when the optional IP
Packet Processor card is installed and enabled – the Performance tab to continue.
6.5.4.4.1
Status | Modem Status
Use this page to view read-only status window pertaining to:
•
Alarms
•
Rx Parameters
•
AUPC
•
CnC (Carrier-in-Carrier)
•
ACM
•
General Status
•
Fractional CnC Counters
Figure 6-33. Status | Modem Status page
6–60
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.4.2
Revision 15
MN-CDM625
Status | Modem Logs
Chapter 5. FRONT PANEL OPERATION
Click the Base Modem tab, or – when the optional IP Packet Processor card is installed and
enabled – the Packet Processor tab to continue.
6.5.4.4.2.1 Status | Modem Logs | Base Modem
Use this page to control how the fault, statistics, and alarm masking parameters are processed
by the unit.
Figure 6-34. Status | Modem Logs | Base Modem page
Events Log
•
Read Next Five Events – Click to buffer the next group of five stored events into the
scrollable events window.
•
Clear Events Log – Click to wipe clean the stored events log.
•
Initialize Events Pointer – Click to reset the log’s internal pointer.
6–61
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
•
Revision 15
MN-CDM625
Unread Events – Displays the total number of unread stored events in the scrollable events
window. As stored event groups are displayed, this number decrements accordingly.
Click [Submit] to save these settings.
Statistics Log
•
Read Next Five Statistics – Click to buffer the next group of five stored events into the
scrollable statistics window.
•
Clear Statistics Log – Click to wipe clean the stored statistics log.
•
Initialize Statistics Pointer – Click to reset the log’s internal pointer.
•
Unread Statistics – Displays the total number of unread stored statistics in the scrollable
statistics window. As stored statistics are displayed, this number decrements accordingly.
Click [Submit] to save these settings.
Alarm Mask
Use the option buttons provided to define a designated alarm as Masked or Active, and then
click [Submit Alarm Mask] to save these changes.
6–62
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.4.2.2 Status | Modem Logs | Packet Processor
This nested page is accessible only to the Administrator when the optional IP
Packet Processor card is installed and enabled. See Sect. 6.5.3.1 for complete
details about using conditional access pages.
This page provides you with a scrollable window showing the optional IP Packet Processor’s
cumulative events, plus control over what information is displayed for IP Packet Processor
operations.
Figure 6-35. Status | Modem Logs | Packet Processor page
Event Logging
The Event Log can display a maximum of 256 events. Each event is assigned a sequential Index
number; its type, the date and time of occurrence, and a description of the event follows.
•
Logging On/Off – Select event logging as On or Off.
•
Logging Level – Use the drop-down list to select the type of information displayed in the log:
Errors Only, Errors and Warnings, or All Information.
Click [Submit] once the desired settings have been entered in this section.
Clear Event Log
Scroll through the Event Log as needed, and then click [Clear Log] to wipe the log clean. The
table will reset to a single event description – “Event log cleared.”
6–63
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.4.3
Revision 15
MN-CDM625
Status | Modem Info
Use this page to view read-only information about the currently configured modem:
•
General Information
•
Equipment ID
•
Scrollable windows listing Installed Options and available Options – Not Installed
Figure 6-36. Status | Modem Info page
6–64
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.4.4
Revision 15
MN-CDM625
Status | Traffic Statistics Pages
Click the Ethernet, WAN, or Clear Counters tab – and, when the optional IP Packet Processor
card is installed and enabled – the Router, Managed Switch, WAN, Compression, QoS, PTP,
MAC Table, or Clear Counters tab to continue.
6.5.4.4.4.1 Status | Traffic Statistics | Ethernet
Use this page to view Ethernet Ingress/Egress Statistics on a ‘Per Port’ basis.
Figure 6-37. Status | Traffic Statistics | Ethernet page
Click [Clear Statistics] to clear all Ethernet statistics from the buffer.
Click [Refresh] to update the page with the latest available statistics.
6–65
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.4.4.2 Status | Traffic Statistics | Router
This nested page is accessible only to the Administrator when the optional IP
Packet Processor card is installed and enabled. See Sect. 6.5.3.1 for complete
details about using conditional access pages.
Use this page to view cumulative router traffic information.
Figure 6-38. Status | Traffic Statistics | Router page
Clear Statistics
Click [Clear] to clear all router statistics from the buffer.
Click [Refresh] to update the page with the latest available statistics.
6–66
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.4.4.3 Status | Traffic Statistics | Managed Switch
This nested page is accessible only to the Administrator when the optional IP
Packet Processor card is installed and enabled. See Sect. 6.5.3.1 for complete
details about using conditional access pages.
Use this page to view cumulative Managed Switch traffic information.
Figure 6-39. Status | Traffic Statistics | Managed Switch page
Clear Statistics
Click [Clear] to clear all Managed Switch statistics from the buffer.
Click [Refresh] to update the page with the latest available statistics.
6–67
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.4.4.4 Status | Traffic Statistics | WAN
This page appearance is dependent on whether the optional IP Packet Processor
card is not installed / installed but disabled or if it is installed and enabled. See
Sect. 6.5.3.1 for complete details about using conditional access pages.
Use this page to view cumulative WAN traffic information.
(Top) Page when optional IP Packet Processor is either not installed or installed but disabled
(Bottom) Page when optional IP Packet Processor is installed and enabled
Figure 6-40. Status | Traffic Statistics | WAN page
6–68
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
For either page version, note the following:
Clear Statistics / WAN Statistics
Click [Clear] or [Clear Statistics] to clear all WAN statistics from the buffer.
Click [Refresh] to update the page with the latest available statistics.
6.5.4.4.4.5 Status | Traffic Statistics | Compression
This nested page is accessible only to the Administrator when the optional IP
Packet Processor card is installed and enabled. See Sect. 6.5.3.1 for complete
details about using conditional access pages.
Use this page to view cumulative Header Compression and Payload Compression statistics.
Figure 6-41. Status | Traffic Statistics | Compression page
Clear Compression Counters
Click [Clear] to clear all compression statistics from the buffer.
Click [Refresh] to update the page with the latest available statistics.
6–69
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.4.4.6 Status | Traffic Statistics | QoS
This nested page is accessible only to the Administrator when the optional IP
Packet Processor card is installed and enabled. See Sect. 6.5.3.1 for complete
details about using conditional access pages.
Use this page to view cumulative Quality of Service information.
Figure 6-42. Status | Traffic Statistics | QoS page (DiffServ Mode)
Clear QoS Counters
Click [Clear] to clear all QoS statistics from the buffer.
Click [Refresh] to update the page with the latest available statistics.
6–70
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.4.4.7 Status | Traffic Statistics | PTP
Sect. 16.7.2 PTP (Precision Time Protocol) (Chapter 16. ETHERNET NETWORK
CONFIGURATION)
Use this page to obtain data intended to troubleshoot PTP operational issues.
Figure 6-43. Status | Traffic Statistics | PTP page
PTP Status
Click [Refresh] to update this section with its most recently accumulated statistics.
These status parameters are read-only and cannot be changed. Note the following:
Row
Description
PTP Offset
LAN State
Indicates the LAN as Disabled or Enabled.
WAN State
Indicates the WAN as Disabled or Enabled.
PTP Statistics
Click [Refresh] to update the page with the latest available statistics.
Click [Clear] to clear all PTP statistics from the buffer.
6–71
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
This statistics table breaks down the number of PTP packets sent or received on the WAN and
LAN ports as follows:
Row
Description (LAN/WAN Rx/Tx Columns)
Event Port
Number of packets (PTP or other) received on the PTP UDP event-message port.
General Port
Number of packets (PTP or other) received on the PTP UDP general-message port.
Announce
Number of PTP announce messages received from another PTP device.
Sync
Number of synchronization messages received from a master PTP device.
Followup
Number of follow-up messages received from a 2-step-clock master PTP device.
Delay Req
Number of Delay Request messages received from a slave device.
Delay Resp
Number of Delay Response messages sent to a slave device.
Mgmt
Number of PTP management messages received by the modem.
Signal
Number of PTP signaling messages received by the modem.
Total number of PTP packets discarded by the modem.
Discarded
Note: Some discarded messages are normal. For example, if the modem receives
a PTP message while it is configuring its PTP port, it will discard that message.
1. At present, PTP is not supported in modems in which the optional IP Packet
Processor is installed and enabled.
2. For better PTP clock accuracy, ingress and egress port sync interval shall be
at least 2 seconds.
3. PTP Master Devices send Announce, Sync, Followup, and Delay Response
messages, while PTP Slave Devices send Delay Request messages.
4. PTP is a UDP multicast protocol. When negotiating with devices over the LAN
interface, the modem uses UDP Port 319 for events, and UDP Port 320 for
general packets. On the WAN interface, the modem uses UDP Port 59319 for
events, and UDP Port 59320 for general packets.
6–72
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.4.4.8 Status | Traffic Statistics | MAC Table
Use this page to view and refresh the MAC Addresses that the modem has discovered on one or
more of its Ethernet switch ports.
Figure 6-44. Status | Traffic Statistics | MAC Table page
MAC Table
Click [Refresh] to update the page with the latest discovered MAC Addresses.
From left to right, note the following:
Column
Description
MAC
The MAC Address of the device on LAN/WAN
DBNum
Database number (always zero)
CPU
Port connected to the modem’s M&C Management Port
P4
User Traffic Port #4
P3
User Traffic Port #3
P2
User Traffic Port #2
P1
User Traffic Port #1
WAN
Packets going into WAN (when the IP Packet Processor is installed and enabled)
Type
Identifies the MAC address as Static or Dynamic
6–73
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.4.4.9 Status | Traffic Statistics | Clear Counters
Use this page to clear and reset the counters for all Traffic Statistics pages (Ethernet, and when
applicable, Router, Managed Switch, WAN, Compression, and QoS).
Figure 6-45. Status | Traffic Statistics | Clear Counters page
Clear All Counters
Click [Clear] to globally clear and reset the Traffic Statistics counters.
6–74
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.4.5
Revision 15
MN-CDM625
Status | Performance Pages
These pages are available only when the optional IP Packet Processor card is
installed and enabled. See Sect. 6.5.3.1 for complete details about using these
conditional access pages.
Click the Performance or Graphs tab to continue.
6.5.4.4.5.1 Status | Performance | Performance
Use this page to view a tabulated “snapshot” of the CDM-625 performance statistics.
Figure 6-46. Status | Performance | Performance page
CPU Usage
Component
% CPU Description
Kernel
The percentage of CPU time used by the packet-processing components of
the module.
Applications
The percentage of CPU time used by the management interfaces.
Total
Cumulative percentage of Kernel and Applications components.
At present, ‘CPU Usage (%)’ is the only viewable parameter; more functionality will
be selectable in future firmware releases.
6–75
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
6.5.4.4.5.2 Status | Performance | Graphs
Figure 6-47. Status | Performance | Graphs page
Use this page to view a graphical representation of the CDM-625 performance. The displayed
graphs automatically update in real time.
Typical for both line graph types, the X-axis denotes elapsed time; the Y-axis denotes
performance, in percent. Either graph scrolls from right to left as viewing time increments.
Click [Add Big] to display a line graph with an extended scale Y-axis.
Click [Add Small] to display a line graph with a compressed scale Y-axis.
For either line graph, use the component check box, located to the right of each graph, to select
that graph’s viewable parameter. The line graph will update to incorporate performance
tracking for that item.
At present, ‘CPU Usage (%)’ is the only selectable parameter; more functionality
will be available in future firmware releases.
Each new graph is added to the bottom of the scrollable page. Any combination of graph types
may be displayed on this page. Click [Remove] to delete the bottom-most graph from the page.
6–76
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.5
Revision 15
MN-CDM625
ODU (Outdoor Unit) Pages (Summary Only)
1. After enabling ODU Comms and configuring the CDM-625 for 70/140 MHz
operation, you may use the ‘ODU (Outdoor Unit)’ pages to control and
monitor the CSAT-5060 or KST-2000A/B Outdoor Unit that is connected via FSK
to the CDM-625.
2. The Comtech EF Data LPOD Amplifier / Block Up Converter is not supported by
the CDM-625 Web Server (HTTP) Interface at this time.
See Appendix F. CDM-625 ODU (TRANSCEIVER, BUC, LNB) Operation for complete
details on using the Web Server Interface for ODU operations.
Figure 6-48. ODU Page Examples (Enable, Config, Status, and Utilities)
6–77
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
6.5.4.6
Revision 15
MN-CDM625
Redundancy page
Take note of the following redundant switch information, as it pertains to IP
Packet Processor Redundancy:
•
1:1 Redundancy is supported using either a CRS-170A L-Band 1:1
Redundancy Switch or a CRS-180 70/140 MHz 1:1 Redundancy Switch, and
a user-supplied, off-the-shelf Ethernet switch.
•
1:N Redundancy is supported using a CRS-300 1:10 Redundancy Switch or a
CRS-500 M:N Redundancy System in 1:N mode based on the following
criteria:
Redundancy Device
Packet Processor
Terrestrial Interface
Mode
CRS-300
Disabled
Any
Any
Disabled
EIA-422/530, V.35,
Sync EIA-232
Any
Enabled
Ethernet
L3 or Bridge
CRS-500
•
Packet Processor Redundancy is supported in both 1:1 and 1:N redundant
configurations using the CRS-500 M:N Redundancy System.
See your pertinent switch Installation and Operation Manuals for detailed
information on using the CDM-625 in a redundancy configuration.
Figure 6-49. Redundancy page
Redundancy Config
•
Redundancy Traffic IP Address – Enter the IP Address and subnet mask in the form
XXX.XXX.XXX.XXX/YY.
6–78
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
The Redundancy Traffic IP Address and subnet mask is different from the
Traffic/Management IP Address and subnet mask that is defined on the
Configuration | LAN | IP page (Sect. 6.5.4.3.2.1).
•
1: N Mode (use with CAUTION!) – Use the drop-down list to set 1:N Redundancy mode as
Disabled or Enabled.
•
Packet Processor Redundancy – When the optional IP Packet Processor card is installed and
enabled in a 1:1 redundancy configuration (i.e., both the traffic and backup modems are
equipped with the optional IP Packet Processor and are connected to a CRS-170A L-Band or
CRS-180 70/140 MHz 1:1 Redundancy Switch), there is no need to use the drop-down list
here, as Packet Processor Redundancy is enabled automatically.
If it is desired to operate either modem outside of the redundant setup as a standalone unit, use
the drop-down list to select Packet Processor Redundancy for that specific modem as Disabled.
Click [Submit] to save these settings.
Force 1:1 switch (Only applies to Online modem)
When redundant modems are used and the selected unit is currently the Online unit, click
[Force 1:1 Switch] to force a switchover so the unit will then be in Offline (standby) mode. The
command is only valid for the Online unit in a 1:1 pair.
Redundancy Monitor
Monitoring of the redundancy setup – both the status of the active modem (i.e., Online or
Offline) and the detected presence of a redundancy switch – is provided in this read-only
section. Click [Refresh] to manually update this page section.
6–79
CDM-625 Advanced Satellite Modem
Ethernet-based Remote Product Management
Revision 15
MN-CDM625
Notes:
6–80
Chapter 7. FORWARD ERROR
CORRECTION OPTIONS
7.1
Overview
As standard, the CDM-625 Advanced Satellite Modem is equipped with four Forward Error
Correction encoders/decoders – Viterbi, Sequential, concatenated Reed-Solomon and Trellis
(which is available with the 8-PSK FAST option). The constraint lengths and encoding
polynomials are not only Open Network compatible, but are also Closed Network compatible
with the vast majority of existing modems from other manufacturers. Comtech EF Data has
performed compatibility testing to ensure inter-operability.
Turbo Product Coding (TPC) and Low-Density Parity Check (LDPC) coding represent a very
significant development in the area of FEC. An option card, field upgradeable, combines LDPC
and TPC together on one module.
While the performance of LDPC is exceptional in terms of coding gain, its higher latency is
considered disadvantageous in some applications. For this reason, Comtech EF Data and
Comtech AHA have jointly developed a completely new family of short-block LDPC codes, which
we have called VersaFEC®. (The name VersaFEC is a trademark registered to Comtech AHA.) It is
ideal for lower data rates that demand the shortest possible latency, and is available as a field
upgradeable option card.
VersaFEC represents the best Forward Error Correction technology currently available, and is
offered with a sufficient range of code rates and modulation types that link performance can be
optimized under almost any conditions.
7.2
Viterbi
The combination of convolutional coding and Viterbi decoding has become an almost universal
standard for satellite communications. The unit complies with the Intelsat IESS 308/309
standards for Viterbi decoding with a constraint length of seven. This is a de facto standard,
even in a closed network environment, which means almost-guaranteed interoperability with
other manufacturer’s equipment. It provides very useful levels of coding gain, and its short
decoding delay and error-burst characteristics make it particularly suitable for low data rate
coded voice applications. It has a short constraint length, fixed at 7, for all code rates. (The
7–1
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
constraint length is defined as the number of output symbols from the encoder that are affected
by a single input bit.)
By choosing various coding rates (Rate 1/2, 3/4 or 7/8) you can trade off coding gain for
bandwidth expansion. Rate 1/2 coding gives the best improvement in error rate, but doubles
the transmitted data rate, and hence doubles the occupied bandwidth of the signal. Rate 7/8
coding, at the other extreme, provides the most modest improvement in performance, but only
expands the transmitted bandwidth by 14%.
A major advantage of the Viterbi decoding method is that the performance is independent of
data rate, and does not display a pronounced threshold effect (i.e., does not fail rapidly below a
certain value of Eb/No). Note that, in BPSK mode, The unit only permits a coding rate of 1/2.
Because the method of convolutional coding used with Viterbi, the encoder does not preserve
the original data intact, and is called non-systematic.
Table 7-1. Viterbi Decoding Summary
FOR
7.3
AGAINST
•
Good BER performance – very useful coding gain.
•
Almost universally used, with de facto standards for
constraint length and coding polynomials.
•
Shortest decoding delay (~100 bits) of any FEC
scheme – good for coded voice, VOIP, etc.
•
Short constraint length produce small error bursts –
good for coded voice.
•
No pronounced threshold effect – fails gracefully.
•
Coding gain independent of data rate.
Higher coding gain possible with other methods.
Sequential
Although the method of convolutional coding and Sequential decoding appears to be very similar
to the Viterbi method, there are some fundamental differences. To begin with, the convolutional
encoder is said to be systematic – it does not alter the input data, and the FEC overhead bits are
simply appended to the data. Furthermore, the constraint length k is much longer (Rate 1/2, k=36.
Rate 3/4, k= 63. Rate 7/8, k=87). This means that, when the decoding process fails (i.e., when its
capacity to correct errors is exceeded), it produces a burst of errors which is in multiples of half
the constraint length. An error distribution is produced which is markedly different to that of a
Viterbi decoder; this gives rise to a pronounced threshold effect.
A Sequential decoder does not fail gracefully – a reduction in Eb/No of just a few tenths of a dB
can make the difference between acceptable BER and a complete loss of synchronization. The
decoding algorithm itself, called the Fano algorithm, uses significantly more path memory – 4 kbps
in this case – than the equivalent Viterbi decoder, giving rise to increased latency. Furthermore, a
fixed computational clock is used to process input symbols and to search backwards and forwards
in time to determine the correct decoding path.
7–2
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
At lower data rates there are sufficient number of computational cycles per input symbol to
permit the decoding process to perform optimally. However, as the data rate increases, there are
fewer cycles available, leading to a reduction in coding gain. This is clearly illustrated in the
performance curves that follow. For data rates above ~1 Mbps, Viterbi should be considered the
better alternative; the practical upper limit in this implementation is 2.048 Mbps.
Table 7-2. Sequential Decoding Summary
FOR
AGAINST
• Pronounced threshold effect – does not fail grace-fully in
poor Eb/No conditions.
Higher coding gain (1-2 dB) at lower data rates,
compared to Viterbi.
• Higher processing delay than Viterbi (~4 k bits) – not good
for low-rate coded voice.
• Upper data rate limit 2.048Mbps
• Coding gain varies with data rate – favors lower data rates.
7.4
Reed-Solomon Outer Codec
The concatenation of an outer Reed-Solomon (R-S) Codec with Viterbi decoder first became popular
when it was introduced by Intelsat in the early 1990s. It permits significant improvements in error
performance without significant bandwidth expansion. The coding overhead added by the R-S outer
Codec is typically around 10%, which translates to a 0.4 dB power penalty for a given link.
Reed-Solomon codes are block codes – as opposed to Viterbi, which is convolutional; in order to
be processed correctly, the data must be framed and de-framed. Additionally, R-S codes are
limited in how well they can correct errors that occur in bursts. This, unfortunately, is the nature
of the uncorrected errors from Viterbi decoders, which produce clusters of errors that are
multiples of half the constraint length. For this reason, the data must be interleaved following RS encoding, and is then de-interleaved prior to decoding. This ensures that a single burst of
errors leaving the Viterbi or Sequential decoder is spread out over a number of interleaving
frames, so errors entering the R-S decoder do not exceed its capacity to correct those errors. In
the case of the CDM-625, different R-S code rates are used according to the mode of operation:
Closed Network Modes and Open Network Modes.
7.4.1 Closed Network Modes
A 220,200 code is used in transparent closed network modes, and a 200,180 code is used in
framed (EDMAC) modes. (220,200 means that data is put into blocks of 220 bytes, of which 200
bytes are data, and 20 bytes are FEC overhead.) These two codes were chosen because they fit
well into Comtech EF Data’s clock generation scheme, and they have almost identical coding
gain. There is also a 225, 205 code available that it compatible with legacy EF Data modems.
When Viterbi decoding is used as the primary FEC, an interleaver depth of 4 is used. The
increase in coding gain is at the expense of delay. The interleaving/de-interleaving delay and the
delay through the decoder itself can be as high as 25 kbits. At very low data rates, this equates
to several seconds, making it highly unsuitable for voice applications. Additionally, the deinterleaver frame synchronization method can add significantly to the time taken for the
demodulator to declare acquisition.
7–3
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
7.4.2 Open Network Modes
Code Rate
219, 201
225, 205
194, 178
126, 112
Mode
Standard IESS-308 E1, and IESS-310 mode
Standard IESS-308 T1
Standard IESS-308 T2/E2
Standard IESS-309 modes
A characteristic of concatenated R-S coding is the very pronounced threshold effect. For any
given modem design, there will be a threshold value of Eb/No below which the demodulator
cannot stay synchronized. This may be due to the carrier-recovery circuits, or the
synchronization threshold of the primary FEC device, or both. In the CDM-625 and with Rate 1/2
operation, this threshold is around 4 dB Eb/No. Below this value, operation is not possible, but
above this value, the error performance of the concatenated R-S system produces exceptionally
low error rates for a very small increase in Eb/No.
Care should be taken not to operate the demodulator near its sync threshold. Small
fluctuations in Eb/No may cause total loss of the link, with the subsequent need for
the demodulator to re-acquire the signal.
Table 7-3. Concatenated RS Coding Summary
FOR
AGAINST
• Exceptionally good BER performance – several
orders of magnitude improvement in link BER
under given link conditions
• Very pronounced threshold effect – does not fail
gracefully in poor Eb/No conditions. Additional
coding overhead actually degrades sync
threshold, and reduces link fade margin.
• Very small additional bandwidth expansion.
• Significant processing delay (~25 kbps) – not
good for voice or IP applications.
• Adds to demod acquisition time.
7.5
Trellis Coding (FAST Option)
In the other FEC methods described here, the processes of coding and modulation are
independent – the FEC codec has no knowledge of, or interaction with the modulator. However,
there are schemes in which the coding and modulation are combined together, where the
encoder places FEC symbols in a precise manner into the signal constellation. This can yield an
overall improvement in performance, and is used in higher-order modulation schemes, such as
8-PSK, 16-PSK, 16-QAM, etc.
When convolution coding is used, the overall coded modulation approach is referred to as Trellis
Coded Modulation (TCM). Ungerboeck was an early pioneer and developed optimum mapping
and decoding schemes. However, the decoding scheme was seen as complex and expensive, and
Qualcomm Inc. developed a variation on the theme that uses a Viterbi decoder at the core,
surrounded by adjunct processing. The scheme, called pragmatic Trellis Coded Modulation, is able
to achieve performance very close to the optimum Ungerboeck method, but with far less
complexity.
7–4
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
As more and more high power transponders are put in to service, Intelsat recognized that the
transponders are no longer power limited, but bandwidth limited. In order to maximize
transponder capacity, 8-PSK was looked at as a method of reducing the occupied bandwidth of a
carrier, and Qualcomm’s pragmatic TCM, at Rate 2/3, was adopted.
A Rate 2/3 8-PSK/TCM carrier occupies only 50% of the bandwidth of a Rate 1/2 QPSK carrier.
However, the overall coding gain of the scheme is not adequate by itself, so Intelsat’s IESS-310
specification requires that the scheme be concatenated with an outer RS codec. When
combined, there is a threshold value of Eb/No of around 6 dB and, above approximately 7 dB,
the bit error rate is better than 1 x 10-8.
The detractions of the concatenated RS approach apply here also, along with more stringent
requirements for phase noise and group delay distortion – the natural consequences of the
higher-order modulation.
The unit fully implements the IESS-310 specification at data rates up to 20 Mbps. In accordance
with the specification, the R-S outer code can be disabled. Performance curves for both cases
are shown in the following figures.
Table 7-4. 8-PSK/TCM Coding Summary
FOR
Exceptionally bandwidth efficient compared to
QPSK.
7.6
AGAINST
• Needs concatenated RS outer codec to give acceptable
coding gain performance.
• Demod acquisition threshold much higher than for QPSK.
• 8-PSK is more sensitive to phase noise and group delay
distortion than QPSK.
Turbo Product Codec (Hardware Option)
Turbo coding is an FEC technique developed within the last few years, which delivers significant
performance improvements compared to more traditional techniques. Two general classes of
Turbo Codes have been developed, Turbo Convolutional Codes (TCC), and Turbo Product Codes
(TPC, a block coding technique). Comtech EF Data has chosen to implement an FEC codec based
on TPC. A Turbo Product Code is a 2 or 3 dimensional array of block codes. Encoding is relatively
straightforward, but decoding is a very complex process requiring multiple iterations of
processing for maximum performance to be achieved.
Unlike the popular method of concatenating an R-S codec with a primary FEC codec, Turbo
Product Coding is an entirely stand-alone method. It does not require the complex interleaving/
de-interleaving of the R-S approach, and consequently, decoding delays are significantly
reduced. Furthermore, the traditional concatenated R-S schemes exhibit a very pronounced
threshold effect – a small reduction in Eb/No can result in total loss of demod and decoder
synchronization. TPC does not suffer from this problem – the demod and decoder remain
synchronized down to the point where the output error rate becomes unusable. This is
considered to be a particularly advantageous characteristic in a fading environment. Typically, in
QPSK, 8-PSK and 16-QAM TPC modes the demod and decoder can remain synchronized 2 – 3 dB
below the Viterbi/Reed-Solomon or TCM cases.
7–5
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
7.7
Revision 15
MN-CDM625
TPC and Low Density Parity Check (LDPC) coding
7.7.1 About TPC/LDPC
In the past few years there has been an unprecedented resurgence in interest in Forward Error
Correction (FEC) technology. The start of this new interest has its origins in the work done by
Claude Berrou et al, and the 1993 landmark paper, Near Shannon Limit Error Correcting Coding
and Decoding – Turbo Codes. FEC is considered an essential component in all wireless and
satellite communications in order to reduce the power and bandwidth requirements for reliable
data transmission.
Claude Shannon, considered by many to be the father of modern communications theory, first
established the concept of Channel Capacity in his 1948 paper A Mathematical Theory of
Communication. This places an absolute limit on how fast it is possible to transmit error-free
data within a channel of a given bandwidth, and with given noise conditions within that channel.
He concluded that it would only be possible to approach this limit through the use of source
encoding – what is familiar today as Forward Error Correction.
Shannon postulated that if it were possible to store every possible message in the receiver,
finding the stored message that most closely matched the incoming message would yield an
optimum decoding method. However, for all but the shortest bit sequences, the memory
required for this, and the time taken to perform the comparisons, makes this approach
impractical. For all practical purposes, the memory requirement and the decoding latency
become infinite.
For many years, there were few advances in the quest to approach the Shannon Limit. The
Viterbi algorithm heralded a major step forward, followed in the early 1990s by the
concatenation of a Viterbi decoder with Reed-Solomon hard-decision block codes. It remained
clear, however, that the Shannon Limit was still an elusive target.
Berrou’s work on Turbo Codes showed, through the use of an ingeniously simple approach
(multiple, or iterative decoding passes) that it is possible to achieve performance close to the
Shannon Limit. Berrou’s early work dealt exclusively with iteratively-decoded convolutional
codes (Turbo Convolutional Coding, or TCC), but in time the iterative approach was applied to a
particular class of block codes called Product Codes – hence Turbo Product Coding (TPC). TPC
exhibits inherently low decoding latency compared with TCC, and so is considered much more
desirable for 2-way, interactive satellite communications applications.
In August 1999, Comtech became the first company in the world to offer satellite modems that
incorporate TPC. Since its inception, Comtech has continued to develop and refine its
implementation of TPC in its products, and now offers a comprehensive range of code rates
(from Rate 5/16 to Rate 0.95) and modulations (from BPSK to 16-QAM). However, in the past
few years, as part of the general interest in Turbo coding, a third class of Turbo coding has
emerged: Low Density Parity Check Codes (LDPC).
LDPC is more like TPC than TCC in that it is an iteratively-decoded block code. Gallager first
suggested this in 1962 but, at the time, the implementation complexity was considered to be
7–6
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
too great; for decades, it remained of purely academic interest. Further interest in LDPC was
stimulated in 2003, when the Digital Video Broadcasting (DVB) committee adopted LDPC codes
(proposed by Hughes Network Systems) as the basis for the new DVB-S2 standard. Now,
however, with silicon gates being cheap, plentiful and fast, an LDPC decoder can easily be
accommodated in a large Field Programmable Gate Array (FPGA) device.
The LDPC method on its own produces an undesirable ‘flaring’ in the Bit Error Rate (BER) vs.
Eb/No characteristic, and for this reason it is desirable to concatenate a short BCH code with
LDPC. This concatenation produces almost vertical BER vs. Eb/No curves, as can be seen in the
performance graphs that are presented later. In order to take full advantage of the coding gain
increase that LDPC provides, it became necessary to find an alternative to 8-PSK. Comtech EF
Data has therefore developed an 8-QAM approach that permits acquisition and tracking at much
lower values of Eb/No than 8-PSK. Comtech’s implementation of 8-QAM is the subject of a U.S.
Patent, granted in 2007.
Comtech EF Data chose the CDM-600 platform as the first satellite modem in which to
implement both LDPC and 8-QAM, and the CDM-625 includes a newer technology version of the
original design.
7.7.2 LDPC versus TPC
Is LDPC better than TPC? The answer must be ‘sometimes, but not always’, and there are issues
such as latency that must be taken into consideration. Figure 7-1 graphs the performance of
various TPC and LDPC modes relative to the Shannon Limit – the Channel Capacity is shown for
both QPSK and 8-PSK. Error free transmission is not possible for values of spectral efficiency
(capacity) vs. Eb/No above these limit curves. The horizontal distance to the limit provides a
metric of overall performance.
It can be seen from this graph that, for Code Rates above 3/4, Comtech’s TPCs are very close
(1-1.5 dB) to the Shannon Limit. However, at 3/4 and below, LDPCs are performing 0.7-1.2 dB
better than TPCs.
Figure 7-1. TPC & LDPC Modes Performance (Relative to Shannon Limit)
7–7
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
It is clear that, in order to provide the best possible performance over the range of code rates
from 1/2 to 0.95, both an LDPC and a TPC codec need to be offered.
In order to meet this requirement, Comtech EF Data has developed a combination LDPC/TPC
Codec module that can be added to the unit. Table 7-5 outlines the operating modes provided
by this module.
Table 7-5. Available TPC/ LDPC Modes
Mode
TPC
LDPC
Rate 21/44 BPSK (aka 1/2)
Rate 5/16 BPSK
Rate 21/44 QPSK, OQPSK (aka 1/2)
Rate 3/4 QPSK, OQPSK
Rate 3/4 8-PSK , 8-QAM
Rate 3/4 16-QAM
Rate 7/8 QPSK, OQPSK
Rate 7/8 8-PSK , 8-QAM
Rate 7/8 16-QAM
Lower Data Rate Limit
(kbps)
18.0
18.0
18.0
27.0
40.0
54.0
31.5
48.0
63.0
Upper Data Rate Limit
(kbps)
5965.9
3906.2
11931.8
18750.0
25000.0
25000.0
21875.0
25000.0
25000.0
Rate 0.95 QPSK, OQPSK (aka 17/18)
34.2
23611.1
Rate 0.95 8-PSK , 8-QAM (aka 17/18)
52.0
25000.0
Rate 1/2 BPSK
Rate 1/2 QPSK, OQPSK
Rate 2/3 QPSK, OQPSK
Rate 2/3 8-PSK , 8-QAM
Rate 3/4 QPSK, OQPSK
Rate 3/4 8-PSK , 8-QAM
Rate 3/4 16-QAM
18.0
18.0
24.0
36.0
27.0
40.5
54.0
6250.0
12500.0
16666.6
25000.0
18750.0
25000.0
25000.0
Code Rate/Modulation
This LDPC/TPC codec module may be installed in any existing CDM-625 as a simple field
upgrade, or it can be pre-installed in new modems ordered from the factory. It also requires the
appropriate FAST codes for enabling operation beyond the base data rate limit of 5 Mbps.
Contact a Comtech EF Data Sales representative during normal business hours for pricing and
delivery information.
Table 7-6 compares all TPC and LDPC modes available in Comtech EF Data’s CDM-625, and
shows Eb/No performance and spectral efficiency (occupied bandwidth) for each case. This
information will be of particular interest to satellite operators wishing to simultaneously balance
transponder power and bandwidth. The large number of modes offered will permit, in the
majority of cases, significant power and/or bandwidth savings when compared with existing
schemes such as concatenated Viterbi/Reed-Solomon, or the popular 8-PSK/Trellis/ReedSolomon (Intelsat IESS-310).
7–8
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Table 7-6. Comparison of all Comtech EF Data TPC/LDPC Modes (CDM-625 with
TPC/LDPC Codec)
Eb/No at
BER = 10-6
(typical)
5.5 dB
Eb/No at
BER = 10-8
(typical)
6.8 dB
1.0 x bit rate
Occupied *
Bandwidth for
1 Mbps Carrier
1190 kHz
BPSK Rate 1/2 LDPC
1.7 dB
1.9 dB
0.50 bps/Hz
2.0 x bit rate
2380 kHz
BPSK Rate 21/44 TPC
2.8 dB
3.0 dB
0.48 bps/Hz
2.1 x bit rate
2493 kHz
BPSK Rate 5/16 TPC
2.4 dB
3.0 dB
0.31 bps/Hz
3.2 x bit rate
3808 kHz
QPSK/OQPSK Rate 1/2 LDPC
1.7 dB
1.9 dB
1.00 bps/Hz
1.0 x bit rate
1190 kHz
QPSK/OQPSK Rate 21/44 TPC
2.8 dB
3.3 dB
0.96 bps/Hz
1.05 x bit rate
1246 kHz
QPSK/OQPSK Rate 2/3 LDPC
2.1 dB
2.4 dB
1.33 bps/Hz
0.75 x bit rate
892 kHz
QPSK/OQPSK Rate 3/4 LDPC
2.7 dB
2.9 dB
1.50 bps/Hz
0.67 x bit rate
793 kHz
QPSK/OQPSK Rate 3/4 TPC
3.4 dB
4.0 dB
1.50 bps/Hz
0.67 x bit rate
793 kHz
QPSK/OQSK Rate 7/8 TPC
4.2 dB
4.3 dB
1.75 bps/Hz
0.57 x bit rate
678 kHz
QPSK/OQPSK Rate 0.95 TPC
8-PSK Rate 2/3 TCM **
and RS (IESS-310)
8-QAM Rate 2/3 LDPC
6.0 dB
6.5 dB
1.90 bps/Hz
0.53 x bit rate
626 kHz
5.6 dB
6.2 dB
1.82 bps/Hz
0.56 x bit rate
666 kHz
4.3 dB
4.6 dB
2.00 bps/Hz
0.50 x bit rate
595 kHz
8-QAM Rate 3/4 LDPC
5.3 dB
5.5 dB
2.25 bps/Hz
0.44 x bit rate
529 kHz
8-PSK/8-QAM Rate 3/4 TPC
6.1 dB
6.7 dB
2.25 bps/Hz
0.44 x bit rate
529 kHz
8-PSK/8-QAM Rate 7/8 TPC
6.7 dB
6.9 dB
2.62 bps/Hz
0.38 x bit rate
453 kHz
8-PSK/8-QAM Rate 0.95 TPC
9.2 dB
10.2 dB
2.85 bps/Hz
0.35 x bit rate
377 kHz
16-QAM Rate 3/4 LDPC
6.7 dB
6.8 dB
3.00 bps/Hz
0.33 x bit rate
396 kHz
16-QAM Rate 3/4 TPC
7.4 dB
8.1 dB
3.00 bps/Hz
0.33 x bit rate
396 kHz
16-QAM Rate 7/8 TPC
16-QAM Rate 3/4 **
Viterbi/Reed-Solomon
16-QAM Rate 7/8 **
Viterbi/Reed-Solomon
7.9 dB
8.1 dB
3.50 bps/Hz
0.28 x bit rate
340 kHz
7.5 dB
8.0 dB
2.73 bps/Hz
0.37 x bit rate
435 kHz
9.0 dB
9.5 dB
3.18 bps/Hz
0.31 x bit rate
374 kHz
Mode
QPSK Rate 1/2 Viterbi **
Spectral
Efficiency
(bps per Hz)
1.00 bps/Hz
Symbol Rate
* The occupied bandwidth is defined at the width of the transmitted spectrum taken at the –10 dB points on the plot of power
spectral density. This equates to 1.19 x symbol rate for the CDM-625 transmit filtering.
** Included for comparative purposes
7–9
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
7.7.3 End-to-End Processing Delay
In many cases, FEC methods that provide increased coding gain do so at the expense of
increased processing delay. However, with TPC, this increase in delay is very modest. Table 7-7
shows the processing delays for the major FEC types, including the three TPC modes.
Table 7-7. TPC/LDPC Processing Delay Comparison
FEC Mode (64 kbps data rate)
End-to-end delay (ms)
Rate 1/2
Viterbi
Sequential
Turbo Product Coding
LDPC Coding
9
Rate 1/2 + Reed Solomon
266
Rate 1/2
74
Rate 1/2 + Reed Solomon
522
Rate 3/4
47
Rate 21/44
41
Rate 5/16
69
Rate 7/8
245 *
Rate 0.95
69
Rate 1/2
198
Rate 2/3, O/QPSK
234
Rate 2/3, 8-PSK, 8-QAM
350
Rate 3/4, O/QPSK
248
Rate 3/4, 8-PSK, 8-QAM, 16-QAM
395
*A larger block is used for the Rate 7/8 code, which increases decoding delay.
Note that, in all cases, the delay is inversely proportional to data rate, so for 128 kbps, the delay
values would be half of those shown above. It can be seen that the concatenated Reed-Solomon
cases increase the delay significantly (due mainly to interleaving/de-interleaving), while the TPC
cases yield delays which are less than or equal to Sequential.
Table 7-8. TPC/LDPC Summary
FOR
AGAINST
• Exceptionally good BER performance – significant improvement
compared with every other FEC method in use today.
• Most modes have no pronounced threshold effect – fails
gracefully.
• Exceptional bandwidth efficiency.
• Coding gain independent of data rate (in this implementation).
• Low decoding delay for TPC.
• Easy field upgrade in CDM-625.
7–10
Nothing!
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
7.8
Revision 15
MN-CDM625
VersaFEC (Short-block LDPC)
VersaFEC is a system of short-block LDPC codes that have been designed as a low-latency
alternative to both Comtech’s existing LDPC codes, and to the system set forth in the DVB-S2
specification (EN 302307) ratified by ETSI.
Since the introduction of Comtech’s LDPC, considerable research has been carried out to find
ways to reduce the block size of LDPC (and hence its latency) while preserving the coding gain
performance very close to the Shannon bound.
The set of VersaFEC codes was developed with two distinct purposes:
1) To provide an expanded choice of combinations of modulation and coding that maintain the
same coding gain performance as Comtech’s existing LDPC, while significantly reducing
latency. The existing LDPC approach (and DVB-S2 short-block) uses blocks that are 16 kbits
in length. VersaFEC, on the other hand, uses block sizes that vary between 2k and 8.2 kbits,
and at the same time reduces latency still further through a novel design approach.
2) To provide combinations of modulation and coding (ModCods) that are suitable not only for
Constant Coding and Modulation (CCM) applications, but are also the basis for a patentpending Adaptive Coding and Modulation (ACM) system. The modulation types (BPSK, QPSK,
8-QAM and 16-QAM) and the code rates have been chosen to give a continuous progression
of performance in terms of both Eb/No and spectral efficiency – an essential aspect of a wellengineered ACM system. There are 12 ModCods in the VersaFEC set. For a detailed discussion
on ACM, see Chapter 17. ADAPTIVE CODING AND MODULATION (ACM).
Table 7-9. The VersaFEC ModCod set
Modulation
Code Rate
BPSK
0.488
Spectral
efficiency,
bps/Hz
0.49
2k
Typical
Eb/No, for
BER = 5 x 10-8
2.4 dB
Latency at
64 kbps, in
milliseconds
26
Min. Data
Rate,
CCM mode
18 kbps
Max. Data
Rate,
CCM mode
5.7 Mbps
QPSK
0.533
QPSK
0.631
1.07
4.1k
2.2 dB
53
20 kbps
10 Mbps
1.26
4.1k
2.7 dB
59
23 kbps
10 Mbps
QPSK
0.706
1.41
4.1k
3.4 dB
62
26 kbps
10 Mbps
QPSK
0.803
1.61
4.1k
3.8 dB
66
28 kbps
12 Mbps
8-QAM
0.642
1.93
6.1k
4.6 dB
89
35 kbps
12 Mbps
8-QAM
0.711
2.13
6.1k
5.2 dB
93
39 kbps
12 Mbps
8-QAM
0.780
2.34
6.1k
5.6 dB
97
43 kbps
12 Mbps
16-QAM
0.731
2.93
8.2k
6.3 dB
125
53 kbps
12 Mbps
16-QAM
0.780
3.12
8.2k
7.0 dB
129
57 kbps
14 Mbps
16-QAM
0.829
3.32
8.2k
7.5 dB
131
60 kbps
14 Mbps
16-QAM
0.853
3.41
8.2k
8.0 dB
132
62 kbps
16 Mbps
Block size,
bits
As a comparison, looking at LDPC Rate 2/3 8-QAM and VersaFEC Rate 0.642 8-QAM essentially
identical spectral efficiency and Eb/No performance. However, at 64 kbps, the latency has been
reduced from 350 milliseconds to 89 milliseconds – a factor of 4 reduction.
7–11
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
The performance of the VersaFEC codes compared with the Shannon bound is shown in Figure 7-2.
This puts the performance of VersaFEC at or near the DVB-S2 performance with 16 kbit blocks.
Figure 7-2. VersaFEC Codes versus Shannon Capacity
Note that SNR is used in place of Eb/No – a convention for comparing ACM ModCods. SNR is
defined as Eb/No + 10log(Spectral Efficiency).
VersaFEC requires both the correct hardware module (PL-0000264) to be installed
in the CDM-625 and Firmware Version 1.3.0 (or higher). ACM requires Firmware
Version 1.4.0 (or higher).
7–12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
7.8.1 VersaFEC Extensions
VersaFEC Extensions require Firmware Version 1.5.4 (or higher)
7.8.1.1 Extended CCM Codes
In Firmware Version 1.5.4 and later, two additional rates have been added to the VersaFEC
family of codes. Note that these are CCM (Constant Coding and Modulation) only – they are NOT
included in the ACM set of ModCods.
These two new codes (Rate 0.576 8-QAM and Rate 0.644 16-QAM) ) have been added to fill in
perceived gaps in the progression of spectral efficiency versus SNR. They do not, in fact, provide
any discernible improvement in Eb/No performance (compared with their nearest neighbors in
the initial VersaFEC family), but exhibit a modest SNR improvement.
Table 7-10. Extended CCM Codes
0.576
Spectral
efficiency,
bps/Hz
1.73
Typical
Eb/No, for
BER = 5 x 10-8
4.5 dB
Latency at
64 kbps, in
milliseconds
87
Min. Data
Rate,
CCM mode
32 kbps
Max. Data
Rate,
CCM mode
11 Mbps
0.644
2.58
6.5 dB
121
47 kbps
11 Mbps
Modulation
Code Rate
8-QAM
16-QAM
7.8.1.2 Ultra-Low-Latency (ULL) Codes
Four new ultra-short block LDPC codes have been added to address the needs of users with
applications requiring even lower latency than the ‘standard’ VersaFEC code set. These new
codes (which are limited to BPSK and QPSK only) use significantly shorter code blocks than
‘standard’ VersaFEC, and as a result, the coding gain is slightly reduced. However, in terms of
latency, the performance is exceptional – far lower than any other FEC method ever offered,
with the exception of Viterbi.
Table 7-11. ULL Codes
Modulation
Code
Rate
Spectral
efficiency,
bps/Hz
Typical
Eb/No, for
BER = 5 x 10-8
Latency at
64 kbps, in
milliseconds
Min. Data
Rate,
CCM mode
Max. Data
Rate,
CCM mode
BPSK
0.493
0.49
3.3 dB
18
18 kbps
5.7 Mbps
QPSK
0.493
0.99
3.3 dB
19
18 kbps
6 Mbps
QPSK
0.654
1.30
3.8 dB
21
24 kbps
9 Mbps
QPSK
0.734
1.47
4.3 dB
23
27 kbps
9 Mbps
7–13
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
7.9
Revision 15
MN-CDM625
Uncoded Operation (No FEC)
Comtech EF Data strongly cautions users when using uncoded operation. If the
acquisition sweep width exceeds one quarter of the symbol rate, there is a very high
probability that the demodulator will false lock.
Example: If selecting 64 kbps QPSK, uncoded, the symbol rate will be half of this
rate, or 32 ksymbols/second. One quarter of this equals 8 kHz. Therefore, the
absolute maximum acquisition sweep range that should be considered is ± 8 kHz. If
there is any frequency uncertainty on the incoming carrier, this should be subtracted
from the sweep width. The problem becomes progressively better with increasing
symbol rate.
Comtech EF Data cannot be held responsible for incorrect operation if you do not
adhere to these guidelines when using uncoded operation.
There are occasions where a user may wish to operate a satellite link with no forward error
correction of any kind. For this reason, the CDM-625 offers this uncoded mode for three
modulation types – BPSK, QPSK, and OQPSK. However, you should be aware of some of the
implications of using this approach.
PSK demodulators have two inherent undesirable features. The first, known as ‘phase
ambiguity’, is due to the fact the demodulator does not have any absolute phase reference and,
in the process of carrier recovery, the demodulator can lock up in any of K phase states where K
= 2 for BPSK, K = 4 for QPSK. Without the ability to resolve these ambiguous states, there would
be a 1-in-2 chance that the data at the output of the demodulator would be wrong in the case of
BPSK. For QPSK, the probability would be 3-in-4.
The problem is solved in the case of BPSK by differentially encoding the data prior to
transmission, then performing the inverse decoding process. This is a very simple process, but
has the disadvantage that it doubles the receive BER. For every bit error the demodulator
produces, the differential decoder produces two.
The problem for QPSK is more complex, as there are four possible lock states leading to four
ambiguities. When FEC is employed, the lock state of the FEC decoder can be used to resolve
two of the four ambiguities, and the remaining two can be resolved using serial differential
encoding/decoding. However, when no FEC is being used, an entirely different scheme must be
used. Therefore, in QPSK, a parallel differential encoding/decoding technique is used, but has
the disadvantage that it again doubles the receive BER.
OQPSK is a different situation again, where the ambiguities result not only from not having an
absolute phase reference, but also not knowing which of the two parallel paths in the demod, I
or Q, contains the half-symbol delay. Another type of differential encoding is used, but yet again
the error rate is doubled, compared to ideal.
NOTE: Whenever uncoded operation is selected, the modem offers the choice between
enabling and disabling the differential encoder/decoder appropriate for the modulation type.
7–14
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
The second problem inherent in PSK demodulators is that of ‘data false locking’. In order to
accomplish the task of carrier recovery, the demodulator must use a non-linear process. A
second-order non-linearity is used for BPSK, and a fourth-order non-linearity is used for QPSK.
When data at a certain symbol rate is used to modulate the carrier, the demodulator can lock at
incorrect frequencies, spaced at intervals of one-quarter of the symbol rate away from the
carrier. Fortunately, when FEC decoding is used, the decoder synchronization state can be used
to verify the correct lock point has been achieved, and to reject the false locks.
However, if uncoded operation is used, there is no way to recognize a data false lock. The
demodulator will indicate that it is correctly locked, but the data out will not be correct.
7–15
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No i n dB
1E-1
1
2
3
4
5
6
7
8
9
Uncoded BPSK/QPSK
10
11
12
Viterbi
Decoding
1E-2
Typical
Performance
1E-3
1E-4
1E-5
1E-6
Specification
limit, Rate 7/8
Coding
1E-7
1E-8
Specification
limit, Rate 3/4
Coding
Specification
limit Rate 1/2
Coding
1E-9
BER
1
2
3
4
5
6
7
Figure 7-3. Viterbi Decoding
7–16
8
9
10
11
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
Viterbi with
concatenated
RS 220,200
Outer Code
Uncoded BPSK/QPSK
1E-2
Sync
threshold,
Rate 3/4
1E-3
Sync
threshold,
Rate 7/8
1E-4
1E-5
Combined sync
threshold, demod
and Viterbi
Decoder, Rate 1/2
Specification
Limit Rate 1/2
and 220,200
Outer Code
1E-6
1E-7
Specification
Limit Rate 3/4
and 220,200
Outer Code
Typical performance
1E-8
Specification
Limit Rate 7/8
and 220,200
Outer Code
1E-9
BER
1
2
3
4
5
6
7
8
9
10
Figure 7-4. Viterbi with Concatenated R-S Outer Code
7–17
11
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1
1E-1
2
3
4
5
6
7
8
9
10
11
12
8-PSK/TCM Rate 2/3
Decoding, with and
without 219, 201 RS
Outer Code
Uncoded BPSK/QPSK
1E-2
1E-3
1E-4
Typical
Performance
1E-5
1E-6
1E-7
1E-8
Specification limit
Rate 2/3 Coding and
219, 201 RS Outer Code
1E-9
BER
1
2
3
4
5
6
Specification
limit, Rate 2/3
Coding
7
8
9
10
11
12
Figure 7-5. 8-PSK/TCM Rate 2/3 with and without Concatenated RS Outer Code
7–18
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No i n dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
16-QAM Viterbi, Rate 3/4 and Rate 7/8
with 220,200 RS Outer Code
1E-2
Uncoded BPSK/QPSK
Uncoded 16-QAM
1E-3
1E-4
Specification
limit Rate 7/8
Viterbi and
220,200 RS
Outer Code
1E-5
Typical
Performance
1E-6
1E-7
1E-8
Specification limit Rate
3/4 Viterbi and 220,200
RS Outer Code
1E-9
BER
1
2
3
4
5
6
7
8
9
10
Figure 7-6. Rate 3/4, Rate 7/8 16-QAM with Concatenated RS Outer Code
7–19
11
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
Sequential Decoding
64 kbps, BPSK,
QPSK and OQPSK
Uncoded BPSK/QPSK
1E-2
Typical
Performance
1E-3
1E-4
1E-5
1E-6
Specification limit,
Rate 7/8 Coding,
QPSK, OQPSK
1E-7
1E-8
Specification limit,
Rate 1/2 Coding,
BPSK, QPSK, OQPSK
Specification limit,
Rate 3/4 Coding,
QPSK, OQPSK
1E-9
BER
1
2
3
4
5
6
7
8
Figure 7-7. Sequential Decoding at 64 kbps
7–20
9
10
11
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
Sequential Decoding
2048 kbps,
QPSK, OQPSK
Uncoded BPSK/QPSK
1E-2
Typical
Performance
1E-3
1E-4
1E-5
1E-6
Specification limit,
Rate 7/8 Coding
QPSK, OQPSK
1E-7
Specification limit,
Rate 3/4 Coding
QPSK, OQPSK
1E-8
Specification limit,
Rate 1/2 Coding
QPSK, OQPSK
1E-9
BER
1
2
3
4
5
6
7
8
9
Figure 7-8. Sequential Decoding at 2048 kbps
7–21
10
11
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
Sequential with
concatenated RS 220,200
Outer Code, 512 kbps
BPSK, QPSK, OQPSK
Uncoded BPSK/QPSK
1E-2
Typical
Performance
1E-3
1E-4
1E-5
1E-6
Specification Limit
Rate 3/4 and
220,200 Outer Code
QPSK, OQPSK
1E-7
1E-8
1E-9
BER
Specification Limit
Rate 1/2 and
220,200 Outer Code
BPSK, QPSK, OQPSK
1
2
3
Specification Limit
Rate 7/8 and
220,200 Outer Code
QPSK, OQPSK
4
5
6
7
8
9
10
11
Figure 7-9. Sequential Decoding at 512 kbps with RS 220,200 Outer Code
7–22
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
Comtech Turbo Product Codec
Rate 5/16 BPSK
Uncoded
BPSK/QPSK
1E-2
1E-3
Spec limit
Rate 5/16
BPSK
1E-4
1E-5
1E-6
1E-7
1E-8
1E-9
BER
Typical performance
1
2
3
4
5
6
7
8
9
10
Figure 7-10. Rate 5/16 BPSK Turbo Product Codec
7–23
11
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
Comtech Turbo Product Codec
Rate 21/44 BPSK/QPSK/OQPSK
Uncoded
BPSK/QPSK
1E-2
Notes:
* Rate 21/44 QPSK is
shown as R1/2 on the
front panel
1E-3
* The OQPSK acquisition
and tracking thresholds
are approx. 1 dB worse
than the QPSK case
Spec limit
Rate 21/44
B/Q/OQPSK
1E-4
1E-5
1E-6
1E-7
1E-8
1E-9
BER
Typical performance
1
2
3
4
5
6
7
8
9
10
11
Figure 7-11. Rate 21/44 BPSK, QPSK, OQPSK Turbo Product Codec
7–24
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
Comtech Turbo Product Codec
Rate 3/4 QPSK/OQPSK,
8-PSK/8-QAM and 16-QAM
Uncoded
BPSK/QPSK
1E-2
Spec limit Rate 3/4
QPSK/OQPSK
Uncoded
8-PSK
Spec limit
Rate 3/4
8-PSK/8-QAM
1E-3
Uncoded
16-QAM
1E-4
1E-5
1E-6
1E-7
Spec limit
Rate 3/4
16-QAM
1E-8
Typical performance
1E-9
BER
1
2
3
4
5
6
7
8
9
10
11
12
Figure 7-12. Rate 3/4 QPSK/OQPSK, 8-PSK/8-QAM and 16-QAM Turbo Product Codec
7–25
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
Comtech Turbo Product Codec
Rate 7/8 QPSK/OQPSK,
8-PSK/8-QAM and 16-QAM
Uncoded
BPSK/QPSK
1E-2
Uncoded
16-QAM
Uncoded
8-PSK
Spec limit Rate 7/8
QPSK/OQPSK
1E-3
Spec limit
Rate 7/8
8-PSK
8-QAM
1E-4
1E-5
1E-6
1E-7
Spec limit
Rate 7/8
16-QAM
1E-8
Typical performance
1E-9
BER
1
2
3
4
5
6
7
8
9
10
11
12
Figure 7-13. Rate 7/8 QPSK/OQPSK, 8-PSK/8-QAM and 16-QAM Turbo Product Codec
7–26
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
Comtech Turbo Product Codec
Rate 0.95 QPSK/OQPSK
and 8-PSK/8-QAM
Uncoded
BPSK/QPSK
1E-2
Spec limit
Rate 0.95
QPSK/OQPSK
1E-3
Uncoded
8-PSK
1E-4
1E-5
1E-6
1E-7
Spec limit
Rate 0.95
8-PSK
8-QAM
1E-8
Typical performance
1E-9
BER
1
2
3
4
5
6
7
8
9
10
11
Figure 7-14. Rate 0.95 QPSK and Rate 0.95 8-PSK Turbo Product Codec
7–27
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
Comtech LDPC Codec
Rate 1/2 BPSK/QPSK/OQPSK
Uncoded
BPSK/QPSK
1E-2
Note:
The OQPSK demod
acquisition and tracking
threshold is about 1 dB
worse than the QPSK
case
1E-3
Spec limit
Rate 1/2
B/Q/OQPSK
1E-4
1E-5
1E-6
1E-7
Typical
performance
1E-8
1E-9
BER
1
2
3
4
5
6
7
8
9
10
Figure 7-15. Rate 1/2 BPSK, QPSK, OQPSK, LDPC Codec
7–28
11
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
Comtech LDPC
Rate 2/3 QPSK/OQPSK
and 8-PSK/8-QAM
Uncoded
BPSK/QPSK
1E-2
1E-3
Spec limit
Rate 2/3
QPSK/OQPSK
Spec limit
Rate 2/3
8-QAM
Uncoded
8-PSK
1E-4
1E-5
1E-6
Spec limit
Rate 2/3
8-PSK
1E-7
Typical
performance
1E-8
1E-9
BER
1
2
3
4
5
6
7
8
9
10
11
Figure 7-16. Rate 2/3 QPSK, OQPSK, 8-PSK, 8-QAM LDPC Codec
7–29
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
Comtech LDPC
Rate 3/4 QPSK/OQPSK
8-PSK/8-QAM and 16-QAM
Uncoded
BPSK/QPSK
1E-2
1E-3
Spec limit
Rate 3/4
8-PSK
8-QAM
Spec limit
Rate 3/4
QPSK/OQPSK
Uncoded
8-PSK
1E-4
1E-5
1E-6
Spec limit
Rate 3/4
16-QAM
1E-7
Typical
performance
1E-8
1E-9
BER
1
2
3
4
5
6
7
8
9
10
11
Figure 7-17. Rate 3/4 QPSK, OQPSK, 8-PSK, 8-QAM, 16-QAM LDPC Codec
7–30
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
6
7
8
9
10
11
12
Comtech VersaFEC® Codec
Rate 0.488 BPSK
Uncoded
BPSK/QPSK
1E-2
1E-3
Rate
0.488
BPSK
1E-4
Typical performance shown guaranteed performance curve
is 0.3 dB to the right
1E-5
1E-6
1E-7
1E-8
1E-9
BER
1
2
3
4
5
6
7
8
9
Figure 7-18. VersaFEC Codec – BPSK, Rate 0.488
7–31
10
11
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
1E-2
Rate
Rate
0.533 0.631
QPSK QPSK
7
8
9
10
11
12
Comtech VersaFEC® Codec
Rate 0.533, 0.631, 0.706,
and 0.803 QPSK
Uncoded
BPSK/QPSK
1E-3
6
Rate
0.706
QPSK
Rate
0.803
QPSK
1E-4
Typical performance shown guaranteed performance curves
are 0.3 dB to the right
1E-5
1E-6
1E-7
1E-8
1E-9
BER
1
2
3
4
5
6
7
8
9
10
Figure 7-19. VersaFEC Codec – QPSK, Rate 0.533, 0.631, 0.706 and 0.803
7–32
11
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1
2
3
4
5
7
8
9
10
11
12
Comtech VersaFEC® Codec
Rate 0.642, 0.711, 0.780
8-QAM
Uncoded
BPSK/QPSK
1E-2
Rate
0.642
8-QAM
6
Rate
0.711
8-QAM
Rate
0.780
8-QAM
1E-3
Uncoded
8-PSK
1E-4
1E-5
1E-6
1E-7
Typical performance show guaranteed performance curves
are 0.3 dB to the right
1E-8
1E-9
BER
1
2
3
4
5
6
7
8
9
10
Figure 7-20. VersaFEC Codec – 8-QAM, Rate 0.642, 0.711, and 0.780
7–33
11
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1E-2
1
2
3
4
5
6
7
8
9
10
11
12
Comtech VersaFEC® Codec
Rate 0.731, 0.780, 0.829
and 0.853 16-QAM
Uncoded BPSK/QPSK
Uncoded 16-QAM
1E-3
Rate
Rate
0.780
0.731
16-QAM 16-QAM
Rate
Rate
0.829
0.853
16-QAM 16-QAM
1E-4
1E-5
1E-6
1E-7
Typical Performance shown guaranteed performance curves
are 0.3dB to the right
1E-8
1E-9
BER
1
2
3
4
5
6
7
8
9
10
11
Figure 7-21. VersaFEC Codec – 16-QAM, Rate 0.731, 0.780, 0.829 and 0.853
7–34
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
1
2
3
Revision 15
MN-CDM625
4
5
6
7
8
9
10
Eb/No in dB
11
12
1E-1
1E-2
Comtech VersaFEC®
Codec - Extended CCM
0.576 8-QAM and
0.644 16-QAM
Uncoded
BPSK/QPSK
Rate
0.576
8-QAM
1E-3
Rate
0.644
16-QAM
Uncoded
8-PSK
1E-4
1E-5
1E-6
1E-7
Typical performance show guaranteed performance
curves are 0.3 dB to the right
1E-8
1E-9
BER
1
2
3
4
5
6
7
8
9
10
11
Figure 7-22. VersaFEC Extended CCM – 8-QAM Rate 0.576 and 16-QAM, Rate 0.644
7–35
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No in dB
1E-1
1E-2
1E-3
1
2
3
4
5
7
8
9
10
11
12
Comtech Ultra-Low-Latency
(ULL) Codec - Rate 0.493
BPSK/QPSK,
0.654 and 0.734 QPSK
Uncoded
BPSK/QPSK
Rate
0.493
BPSK/QPSK
6
Rate
Rate
0.654 0.734
QPSK QPSK
1E-4
Typical performance shown guaranteed performance curves
are 0.3 dB to the right
1E-5
1E-6
1E-7
1E-8
1E-9
BER
1
2
3
4
5
6
7
8
9
10
11
Figure 7-23. ULL Codec – BPSK/QPSK Rate 0.493 and QPSK, Rate 0.654 and 0.734
7–36
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Eb/No i n dB
1E-1
1E-2
1
2
3
4
5
6
7
8
9
10
11
12
Differential
Encoding No FEC, no
scrambling
Uncoded BPSK/QPSK
1E-3
1E-4
1E-5
1E-6
1E-7
1E-8
1E-9
BER
1
2
3
4
5
6
7
8
9
10
Figure 7-24. Differential Encoding – No FEC, No Scrambling
7–37
11
12
CDM-625 Advanced Satellite Modem
Forward Error Correction Options
Revision 15
MN-CDM625
Notes:
7–38
Chapter 8. AUTOMATIC UPLINK
POWER CONTROL (AUPC)
8.1
Overview
WARNING! YOU MUST OBTAIN PERMISSION FROM THE SATELLITE OPERATOR TO
USE THIS FEATURE. IMPROPER USE OF THIS FEATURE COULD RESULT IN A
TRANSMITTING TERMINAL SERIOUSLY EXCEEDING ITS ALLOCATED FLUX DENSITY
ON THE OPERATOR’S SATELLITE. THIS COULD PRODUCE INTERFERENCE TO OTHER
CARRIERS, AND COULD CAUSE TRANSPONDER SATURATION PROBLEMS.
AUPC is an acronym for Automatic Uplink Power Control. This feature permits a local modem to
adjust its own output power level in order to attempt to maintain the Eb/No at the remote
modem. To accomplish this, you must use one of the following framing types:
•
EDMAC, EDMAC-2, or EDMAC-3
•
D&I++
•
ESC++
•
Framed QDI
The remote modem constantly sends back information about the demodulator Eb/No using
reserved bytes in the overhead structure. The local modem then compares this value of Eb/No
with a pre-defined target value. If the Remote Eb/No is below the target, the local modem will
increase its output power, creating a closed-loop feedback system over the satellite link. A
particularly attractive benefit of this feature is that, whenever framed operation is selected, the
remote demodulator’s Eb/No can be viewed from the front panel display of the local modem.
Note that both EDMAC and AUPC can be used simultaneously with either framing type.
There are several important parameters associated with this mode of operation. You must
understand how the AUPC feature works, and what the implications are for setting these
parameters.
8–1
CDM-625 Advanced Satellite Modem
Automatic Uplink Power Control (AUPC)
8.2
Revision 15
MN-CDM625
Setting AUPC Parameters
The important consideration is that EDMAC framing should be enabled.
Do these steps:
1. Use the SELECT: Configuration  Mode menu to first select EDMAC framing. You may
select EDMAC as IDLE, or define the unit as an EDMAC Master or Slave.
2. Verify that the remote modem also has EDMAC framing enabled.
3. Set the nominal output power of the modem: Use the SELECT: Configuration  Tx 
POWER menu to select MANUAL mode, and then edit the displayed Tx output power level.
4. Select AUPC as the operating mode. At this point, you are prompted to define four key
parameters: Target Eb/No, Max Range, Alarm, and Demod Unlock.
8.2.1 Target Eb/No
This is value of Eb/No that you need to keep constant at the remote modem:
•
The minimum value to enter is 0.0 dB. If the Eb/No falls below this value, the AUPC control
will increase the Tx output power, but will never exceed the value determined by the
parameter MAX RANGE.
•
The maximum value to enter is 14.9 dB. If the Eb/No exceeds this value, the AUPC control
will reduce the Tx output power, but will never drop below the nominal value set.
•
The default value is 3.0 dB.
•
The resolution is 0.1 dB.
8.2.2 Max Range
This defines how much the modem is permitted to increase the output level, under AUPC
control:
•
The minimum value to enter is 0 dB.
•
The maximum value to enter is 9 dB.
•
The default value is 1 dB.
•
The resolution is 1 dB.
8–2
CDM-625 Advanced Satellite Modem
Automatic Uplink Power Control (AUPC)
Revision 15
MN-CDM625
8.2.3 Alarm
This defines modem behavior if the maximum power limit is reached while under AUPC control.
The two choices are:
•
NONE (no action) – default setting.
•
Tx ALARM (generate a Tx alarm).
8.2.4 Demod Unlock
This defines the action the modem will take if the remote demodulator loses lock. The two
choices are:
•
NOMINAL (reduce the Tx Output Power to the nominal value) – default setting.
•
MAXIMUM (increase the Tx Output Power to the maximum value permitted by the
parameter MAX RANGE).
If the local demod loses lock, then the modem automatically moves its output power
to the nominal value.
8.3
Compensation Rate
As with any closed-loop control system, you must choose loop parameters that ensure stability
at all times. Several features ensure that the AUPC system does overshoot, or oscillate:
•
First, corrections for which the output power can be made are fixed at the rate of once
every 4 seconds. This takes into account the round trip delay over the satellite link, the time
taken for a power change to be reflected in the remote demodulator’s value of Eb/No, and
other processing delays in the modems.
•
Second, if the comparison of actual and target Eb/No yields a result that requires a change
in output power, to avoid the possibility of overshoot the first correction made will be at
80% of the calculated step. Subsequent corrections are made until the difference is less than
0.5 dB. At this point, the output power is only changed in increments of 0.1 dB to avoid
‘hunting’ around the correct set point.
8–3
CDM-625 Advanced Satellite Modem
Automatic Uplink Power Control (AUPC)
8.4
Revision 15
MN-CDM625
Monitoring
CAUTION – Comtech EF Data strongly cautions against the use of large values of
permitted power level increase under AUPC control. You should consider using the
absolute minimum range necessary to improve rain-fade margin.
The remote demodulator’s value of Eb/No can be monitored at all times, either from the front
panel (SELECT: Monitor  AUPC) or via the remote control interface. The resolution of the
reading is 0.2 dB. For all values greater than or equal to 16 dB, a value of 16.0 dB will be
displayed. As long as framing is enabled, the value will still be available, even though AUPC may
be disabled.
The current value of Tx power increase is also displayed. If EDMAC framing is enabled but AUPC
is disabled, this will indicate 0.0 dB. This value is also available via the remote control interface.
8–4
Chapter 9. CLOCK MODES A ND
DROP AND INSERT (D&I)
9.1
Overview
When dealing with satellite modems, the subject of clocking can be a complex issue. This
chapter describes the various clocking options that are available with the CDM-625.
The CDM-625 provides two fundamentally different interfaces:
9.2
•
Synchronous clock and data interfaces (EIA-422, V.35, etc.) that permit great flexibility
concerning the source and direction of clocks. These cause the most confusion.
•
G.703 interfaces, in which the clock and data are combined into a single signal (and are
referred to as self-clocking). In their basic form, these are less flexible and therefore easier
to understand. However, when used with Drop and Insert operation, the subject again
becomes more complex.
Transmit Clocking
There are five transmit clocking modes in the CDM-625. EIA-422/449 signal mnemonics will be
used for illustration, but the description applies equally to V.35, HSSI, and LVDS. Figure 9-1
provides a graphic depiction of these modes.
9.2.1 Internal Clock
In this mode, the modem, assumed always to be the DCE, supplies the clock to the DTE. (The
EIA-422/449 name for this signal is Send Timing, or ST.) The DTE then clocks from this source,
and gives the modem transmit data (Send Data, or SD) that is synchronous with this clock. It is
optional whether the DTE also returns the clock (Terminal Timing, or TT) – the modem can
accept it if it is present, but uses ST if it is not. At rates above 2 Mbps, Comtech EF Data highly
recommends that you return TT to ensure the correct clock/data relationship.
G.703 and ASI: The internal clock mode does not apply – the clock is always recovered from the
incoming signal, and the modem locks its modulator clocks to this.
IP and Audio: This is the only available mode.
9–1
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
Revision 15
MN-CDM625
9.2.2 TX Terrestrial
In this mode, the modem expects to see the DTE provide the clock so that it can phase-lock its
internal circuits. In this case, the modem does not provide any signal on ST, but instead requires
a clock signal on Terminal Timing (TT) that is synchronous with the data. If no clock is present, an
alarm will be generated and the modem will substitute its internal clock.
G.703 and ASI: This is the ‘natural’ clock mode.
IP and Audio: Does not apply.
9.2.3 RX Loop-Timed, RX=TX
In certain circumstances, a terminal at the distant-end of a satellite link may be required to
provide a clock to the DTE equipment that is locked to the receive satellite signal. This is similar
to Internal Clock mode in that the modem will source Send Timing (ST) to the DTE, but now the
timing is derived from the demodulator. The DTE then clocks from this source and gives the
modem transmit data (Send Data, or SD) that is synchronous with this clock. It is optional
whether the DTE also returns the clock (Terminal Timing, or TT) – the modem can accept it, if it
is present, but uses ST if it is not. If the demodulator loses lock, the modem’s internal clock will
be substituted, so an accurate and stable clock is present on ST rather than a clock that may
jitter and wander in a random fashion.
G.703, ASI, IP and Audio: Does not apply.
9.2.4 RX Loop-Timed, RX<>TX (Asymmetric Loop Timing)
The CDM-625 incorporates circuitry that permits loop timing when the TX and RX data rates are
not the same. In this case, the clock frequency appearing at ST will be whatever the TX data rate
is programmed to, but will be phase-locked to the demodulator’s receive symbol clock. In all
other respects, the operation is the same as for ‘standard’ loop timing.
G.703, ASI, IP and Audio: Does not apply.
9.2.5 External TT with ST = RX Satellite
This is a special case that addresses a particular need for backwards compatibility with the
SDM-300A modem. It is, in many ways, similar to the standard TX Terrestrial mode described in
Sect. 9.2.2 in that, in this mode, the signal appearing on TT is used to provide the timing
reference for the transmit side of the CDM-625. However, in this mode the ST pins on the
interface are active and provide a copy of the RX Satellite clock (i.e., the clock from the
demodulator, prior to the buffer).
This mode is subject to certain limitations:
•
RX and TX data rates must be identical.
9–2
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
Revision 15
MN-CDM625
•
No framing (EDMAC, etc.) may be used.
•
No RS coding may be used.
•
RS-422, V.35, HSSI, and LVDS are the only interfaces supported and used on the Type ‘D’ 25pin connector.
Figure 9-1. TX Clock Modes
9–3
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
9.3
Revision 15
MN-CDM625
Receive Clocking
There are three receive clocking modes in the CDM-625: Buffer Disabled (RX Satellite), Buffer
Enabled (TX=RX), and Buffer Enabled (RX< >TX). An additional setting used only for Drop and
Insert is described in further detail later in this chapter. Figure 9-2 provides a graphic depiction
of these modes.
9.3.1 Buffer Disabled (RX Satellite)
When the buffer is disabled, the receive clock (Receive Timing, or RT) is derived directly from the
demodulator, and will therefore be subject to plesiochronous and Doppler offsets. This may
acceptable in certain instances. There is still a minimum buffer in use to de-jitter the effects of
removing overhead framing.
G.703: Applicable.
9.3.2 Buffer Enabled, TX=RX (TX Terrestrial or Int (SCT) Clock)
In this instance, it is required that buffer be enabled, so that the clock and data appearing on
Receive Timing and Receive Data (RT and RD, respectively) are synchronous with the transmit
clock or the internal (SCT) clock. This is a relatively simple case, as the output clock for the buffer
is derived directly from ST, TT, or the external source.
G.703: Applicable.
9.3.3 Buffer Enabled, RX<>TX (TX Terrestrial or Int (SCT) Clock)
This is an uncommon case, where the receive data rate does not equal the transmit or external
reference. The modem will generate a phase-locked buffer output clock that uses the selected
reference, regardless of its frequency in relation to the receive data rate.
G.703: Applicable.
9–4
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
Revision 15
MN-CDM625
Figure 9-2. RX Clock Modes
9–5
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
9.4
Revision 15
MN-CDM625
X.21 Notes
The central feature of X.21 is that the DCE supplies the clock for both directions. Therefore, the
first requirement is that TX and RX data rates are the same. Because the DCE doesn’t get an
input clock moving in the same direction as its input data, the several nanoseconds of delay
through long cables and the modem’s data transceivers can cause the clock phase to change
relative to the data. This is why X.21 is not recommended above 2048 kbps.
If Modem = DCE (normal assumption), then X.21 mode is just a matter of ignoring ST and TT
and, instead, using RT to run both directions. Using the clock settings TX Clk = Loop and RX
Buffer Clk = RX assumes that the desired timing is coming from the far-end modem. The
modem’s ST is forced to be a copy of RT, because the latter assumes use by the terrestrial DTE
to drive SD data into the modem.
If, instead, the local modem supplies the timing, the clock settings should be TX Clk = Int and RX
Buffer Clk = TX or Int. These settings instead force RT to be a copy of ST. In either case, it is SD
that has an uncertain phase relationship to the clock due to round-trip delays, so the modem’s
TX clock invert feature may be necessary to avoid clocking in SD on its transitions.
If Modem = DTE, then ST and RT are ignored, and TT from the terrestrial DCE is used. The
correct modem settings are TX Clk = TT and RX Buffer Clk = TX. These settings force RT (which
drives out the modem’s RD) to be a copy of TT. It is now RD that has an uncertain phase
relationship to the clock, so the modem’s RX clock invert may be necessary to please the
terrestrial DCE.
9.5
Drop and Insert
The Drop and Insert (D&I) multiplexer works in conjunction with the G.703 interfaces to enable
the modem to transmit or receive fractional parts of a T1 or E1 data stream.
The D&I option provides fully compliant baseband processing in accordance with Intelsat
IESS-309 for the terrestrial information rate of 2048 kbps (E1) and 1544 kbps (T1), using G.703
interfaces. The data rate sent over the satellite link is n x 64 kbps. See the Frame Formats
diagram for the permissible values of n. The modem provides the interface to transmission level
framing compliant to IESS-309 Data Type 2.
9–6
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
9.6
Revision 15
MN-CDM625
Frame Formats
Figure 9-3 shows the supported E1 and T1 Frame Formats. Note that, for D&I++, the smaller
overhead frame structure does not support CAS signaling, although E1 timeslot 16 may still be
one of the channels transmitted.
E1-CCS (Common Channel Signalling)
2048 kbps E1 Frame
Time
Slot
No.
0
1
1
2
2
3
3
4
4
5
5
6
6
Maximum channels to drop = 30 = 1920 kbps
7
7
8
8
9
9
10 11
10 11
12
12
13
13
14
14
15
15
16
Reserved for
Framing
16
17
2048 kbps E1 Frame
0
1
1
2
2
3
3
4
4
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
5
5
6
6
Maximum channels to drop = 30 = 1920 kbps
7
7
8
8
9
9
10 11
10 11
12
12
13
13
14
14
15
15
16
Reserved for
Framing
16
17
18
19
19
20
20
21
21
22
22
23
23
24
24
25
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10 11 12
10 11 12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
T1-D4 (D4 Framing)
1544 kbps T1 Frame 12-Frame multi-frame structure. No IBS multi-frame signalling will be transmitted.
Maximum channels to drop = 24 = 1536 kbps n x 64 kbps, n = 1,2,3,4,5,6,8,10,12,15,16,20,24
Time
Slot
No.
1
1
2
2
3
3
4
4
27
28
25
26
26
27
27
28
Reserved for Signalling. All signalling is transmitted
for TS's dropped in IBS overhead (500Hz per TS)
Signalling information in TS 16 is associated to
specific TS's.
1544 kbps T1 Frame 24-Frame multi-frame structure. No IBS multi-frame signalling will be transmitted.
Maximum channels to drop = 24 = 1536 kbps n x 64 kbps, n = 1,2,3,4,5,6,8,10,12,15,16,20,24
1
1
26
27
5
5
28
29
29
30
30
31
28
29
29
30
30
31
n x 64 kbps, n = 1,2,4,6,8,12,16,24,30
17
18
T1-ESF (Extended Super Frame)
Time
Slot
No.
25
26
May be reserved for Signalling. All signalling
information is common to all 30 TS and no signalling is
transmitted.
E1-CAS (Channel Associated Signalling)
Time
Slot
No.
n x 64 kbps, n = 1,2,3,4,5,6,8,10,12,15,16,20,24,30
6
6
7
7
8
8
9
9
10 11 12
10 11 12
13
13
14
14
15
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
Figure 9-3. Supported T1 and E1 Framing Formats
9–7
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
9.7
Revision 15
MN-CDM625
Timeslot Selection
Selection of the transmit and receive data rates may be made in certain 64 kbps increments and
may be independent of each other. The actual satellite rates for open network D&I are 16/15 of
the transmit or receive data rate to include IBS overhead per IESS-309, although this is
transparent to the user.
For E1, you can select any timeslot (TS) from 1 to 31. Selection of TS 0 is permitted (on the front
panel menus, use ‘z’ to add to the list of timeslots to be dropped/inserted).
For T1, you can select any timeslot (TS) from 1 to 24. You may also select “N/A” to leave a
satellite channel unused.
The configuration menu allows timeslots to be selected for transmission or reception up to the
maximum dictated by the selected transmit or receive data rate, and may be selected in
arbitrary order. For example, if the data rate is set to 256 kbps, the maximum number of
timeslots that can be dropped or inserted is 4 (being 4 x 64 kbps).
Note that, for 1920 kbps data rate, the timeslots may not be manipulated. This is the ‘fixed
channel’ mode where Timeslot 1 is assigned to Channel 1, and so on.
For D&I++ framing, all increments of 64 kbps are allowed up to a maximum of 31 (1984 kbps).
For this mode, the satellite rate is 46/45 of the front panel data rate (2.22%).
9–8
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
9.8
Revision 15
MN-CDM625
Drop and Insert (D&I) Clocking
Figure 9-4 shows the general arrangement for Drop and Insert clocking in the CDM-625. Note
that there are two inputs and two outputs shown for Drop and Insert Operation:
Drop Data In (DDI)
Drop Data Out (DDO)
Insert Data In (IDI)
Insert Data Out (IDO)
This arrangement permits you to choose between fully independent operation of the incoming
and outgoing E1/T1 signal, or to use the same T1/E1 signal for both Dropping and Inserting
(looped mode). If ‘Loop’ has been selected under the Drop and Insert configuration menu, the
Drop Data Out (DDO) signal is automatically looped internally, to become the Insert Data In (IDI).
In this mode, timeslots are dropped from an incoming E1/T1 signal for transmission over the
satellite, and the same E1/T1 signal has timeslots re-inserted into it that will over-write data in
existing timeslots.
Figure 9-4. Drop and Insert Clocking
9–9
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
9.9
Revision 15
MN-CDM625
RX Buffer Clock = Insert (D&I only)
The E1 or T1 clock recovery from the IDI G.703 port serves as the RX Buffer reference. In
addition, the recovered data is the E1/T1 input to the Insert Mux. If the RX G.703 recovery
circuit detects no activity at IDI input, or cannot detect the expected frame format, Buffer Clock
= RX Satellite will be chosen as a fall-back.
If ‘Insert’ is not the selected buffer clock reference, the clock and data from the IDI port is
ignored, and a new E1/T1 frame is generated. The timeslots coming from the satellite are then
re-inserted into the selected timeslots of this new blank frame, and output on the IDO port.
9.10 Single-Source Multiple Modems
Two ways to connect a single T1 or E1 stream to several modems are by looming or daisy-chaining
modems. Looming method is illustrated in Figure 9-5, while Figure 9-6 illustrates the daisy-chain
method – each requires the RX Buffer Clock = Insert setting. Note the following:
•
Assign all timeslots to not overlap.
•
Assign modems to number of TX/RX channels as required.
Figure 9-5. Single-Source Multiple Modems (Looming)
MODEM
MODEM
MODEM
IDI
DDI
DDO
IDI
Terrestrial Trunk
IDO
Multiple Modem Drop & Insert Application: This application shows how the loop is extended
to one or more additional modems.
DDO- IDI connection may be made internally using Loop = Y under D&I menu.
Figure 9-6. Single-Source Multiple Modems (Daisy-chain)
9–10
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
9.11
Revision 15
MN-CDM625
G.703 Clock Extension
There are some applications where it becomes necessary, at the distant end of a satellite link, to
provide a high-stability G.703 timing reference for timing equipment connected to the modem.
For example, in cellular backhaul applications, the BTS equipment may require such a reference
even though the satellite link itself may be operating at a data rate other than 1.544 Mbps or
2.048 Mbps. This is sometimes accomplished by adding a specialized GPS receiver at the distant
end, which then provides the G.703 synchronizing signal. However, with the G.703 clock
extension mode this may become unnecessary, as the CDM-625 – operating at either end of the
link, where the local modem has access to a high-stability G.703 signal – can provide an almost
perfect copy of this signal at the distant end. The presence of Doppler shift on the link is the only
factor affecting the overall accuracy. If Doppler shift were not present, the copy of the clock
would be perfect.
This is accomplished by the use of a novel frequency synthesis and phase locking scheme. This
feature of the CDM-625 permits the distant end to generate a G.703 synchronizing signal that,
depending on a sufficiently accurate local reference, has short term accuracy to within parts in
10-8, and is solely dependent on link Doppler shift.
The subsections and figures that follow illustrate three possible G.703 clock extension modes.
Details of how to set up the modems for these various operating modes are given in Chapter 5.
FRONT PANEL OPERATION.
9.11.1
Clock Extension Mode 1
Figure 9-7 shows Clock Extension Mode 1. The local modem is assumed to be operating on
INTERNAL clock. A T1 or E1 G.703 signal is applied to the rear panel connector of the modem,
where the clock is recovered.
(Note: the G.703 signal is not intended to convey data – its function is only to provide a
synchronizing clock. The data is transferred using the EIA-530/V.35 serial interface.)
The internal clock reference generator locks – in both frequency and phase – to this recovered
clock, and a special synthesizer generates an ST clock of ANY ARBITRARY FREQUENCY over the
range 2.4 kHz to 9.98 MHz with a resolution of 1 Hz. The synthesis is exact – there is no
approximation or residual error. For example, if you select 168.231 kbps as the transmit data
rate, and an E1 reference, there will be exactly 168,231 clock cycles generated for every
2,048,000 cycles of the E1 reference.
The internal ST clock is now used, as in the standard Internal Clock mode, to provide the timing
reference for the externally-connected equipment. The data is then transmitted at the desired
data rate to the distant end (or distant ends – this works for broadcast applications as well).
Now, at the distant end modem (timing mode: RX Satellite), the RX signal is received,
demodulated, and the clock is recovered. A second synthesizer, very similar to the one used at
the local modem, is now used to generate an E1 or T1 timing signal. Again, it should be
9–11
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
Revision 15
MN-CDM625
emphasized that the synthesis is exact. The net result is that the E1 or T1 timing signal used at
the local end is reproduced at the distant end, regardless of the link data rate.
The only thing that affects the overall accuracy and stability of the copy of the clock is the
Doppler shift of the link itself. This will be very dependent on the particular satellite used, and
the accuracy of the orbital station keeping (often referred to as orbital inclination). Typically the
Doppler variations are in the order of parts in 10-8, but more importantly it should be recognized
that, over a 24 hour period, the net error would be zero due to a fundamental characteristics of
geostationary orbits.
The T1 or E1 signal, available on the rear panel of the modem on the G.703 connectors, is now
used to provide a synchronizing source for equipment connected to the modem. The form of
this is an ‘all ones’ signal, which provides the maximum transition density in the AMI signal.
Note: This scheme is sufficiently flexible to permit an E1 signal to be used at the local end, and a
T1 signal to be reproduced at the distant end, or vice versa.
9.11.2
Clock Extension Mode 2
Figure 9-8 shows Clock Extension Mode 2. This is for situations where clock extension needs to
be performed, but there is no local G.703 reference. In this case, the local modem now operates
in an EXTERNAL clock mode and the accuracy of the TX Clock is determined solely by the
accuracy of the equipment connected to the modem.
At the distant end, an E1 or T1 synchronizing signal is generated regardless of the link data rate,
as in Mode 1.
9.11.3
Clock Extension Mode 3
Figure 9-9 shows Clock Extension Mode 3. This is very similar to Mode 1 but now, instead of the
EIA-530/V.35 serial interface being used, everything is based around the 10/100 Base T Ethernet
interface.
.
At the distant end, an E1 or T1 synchronizing signal is generated regardless of the link data rate,
as in Mode 1
9–12
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
Revision 15
MN-CDM625
CDM-625
CDM-625
Figure 9-7. G.703 Clock Extension Mode 1
9–13
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
Revision 15
MN-CDM625
CDM-625
CDM-625
Figure 9-8. G.703 Clock Extension Mode 2
9–14
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
Revision 15
MN-CDM625
CDM-625
CDM-625
Figure 9-9. G.703 Clock Extension Mode 3
9–15
CDM-625 Advanced Satellite Modem
Clock Modes and Drop and Insert (D&I)
Revision 15
MN-CDM625
9.12 Quad E1 Operation
Up to four complete or fractional E1 streams may be concatenated into a single Comtech
proprietary satellite frame structure using the Quad E1 feature. The “Balanced G.703” and “Aux
G.703” 9-pin D-sub female connectors on the CDM-625 rear panel each provide access to two
ports. See Sect. 3.2.2.2 G.703 Connectors for pinout details.
Selected timeslots for each active port are “dropped” onto the transmit satellite frame in order
of port number and drop channel number, with the reverse “insert” operation on the receive
side. For each port, if n=32 is selected, then it is not assumed that the E1 into the modem
contains framing. Data may be framed or unframed, and the modem will simply transmit the
entire 2048 kbps stream on that port’s portion of the satellite frame; this is why timeslot
selection is disabled for n=32. However, for any fractional value of “n”, the incoming E1 to that
port must have TS0 framing so that the selected timeslots to be dropped can be identified.
Beginning with Firmware Version 2.0.1, changes to Quad E1 operation allow the combining of
asynchronous E1 streams. Prior to Firmware Version 2.0.1, it was important for all ports to be
synchronous to one another in order to operate without data loss – bit stuffing is now
performed on slower data streams to match them to faster ones. Satellite overhead is used to
identify extra data on each port that was sent over the link. The extra data is then removed at
the receiver, so that each port’s timing is maintained. As a result, it is important that the ports
used and the number of timeslots for each port match at both ends of the link. The
recommendation for G.703 requires that the actual bit rate be within ±50 ppm of 2048 kbps.
If asynchronous E1 streams are used at the transmit side of the link, it is important to keep the
receive buffer set to “Rx Satellite”. The “Tx Terrestrial” setting should only be used if all E1
streams are synchronous to one another (no bit stuffing over the satellite frame) and the
resulting E1 streams from the receiver need to be retimed to a local reference.
There is a hardware limitation for base modem boards previous to HW Rev 2.x (see front panel
under the SELECT: FAST menu): Older boards use a common receive E1 clock for ports 3 and 4,
so it is necessary that ports 3 and 4 at the transmitting modem remain synchronized to one
another.
9–16
Chapter 10. DOUBLETALK
CARRIER-IN-CARRIER OPTION
WARNING – BEFORE ATTEMPTING TO COMMISSION A SATELLITE LINK USING
CARRIER-IN-CARRIER, YOU MUST ENSURE THAT THE LINK IS ROBUST ENOUGH FOR
NORMAL OPERATION. ONLY WHEN THIS HAS BEEN DONE – AND ALL SYSTEM ISSUES
(E.G., ANTENNA-POINTING, CABLING, TERRESTRIAL INTERFERENCE, SATELLITE
INTERFERENCE, ETC.) HAVE BEEN RESOLVED – SHOULD YOU ATTEMPT THE USE OF
CARRIER-IN-CARRIER.
10.1 Overview
Space segment costs are typically the most significant operating expense for any satellite-based
service, having a direct impact on the viability and profitability of the service. For a satellite
transponder that has finite resources in terms of bandwidth and power, the leasing costs are
determined by bandwidth and power used. Therefore, a satellite circuit should be designed for
optimal utilization to use a similar share of transponder bandwidth and power.
The traditional approach to balancing a satellite circuit – once the satellite and earth station
parameters are fixed – involves trade-off between modulation and coding. A lower order
modulation requires less transponder power while using more bandwidth; conversely, higher
order modulation reduces required bandwidth, albeit at a significant increase in power.
Comtech EF Data has added a new dimension to satellite communication optimization:
DoubleTalk Carrier-in-Carrier.
10.2 What is DoubleTalk Carrier-in-Carrier?
The CDM-625’s DoubleTalk Carrier-in-Carrier (CnC) option uses a patented signal processing
algorithm developed by Raytheon Applied Signal Technology that allows both the forward and
reverse carriers of a full duplex link to share the same segment of transponder bandwidth, using
patented “Adaptive Cancellation.” Raytheon Applied Signal Technology uses the term
DoubleTalk, and Comtech EF Data refers to it as DoubleTalk Carrier-in-Carrier (CnC) 1.
CnC was first introduced in Comtech EF Data’s CDM-Qx Satellite Modem and, more recently, in
the CLO-10 Link Optimizer. The implementation of DoubleTalk Carrier-in-Carrier in the CDM-625
1
®
DoubleTalk is licensed from Raytheon Applied Signal Technology.
®
DoubleTalk is a registered trademark of Raytheon Applied Signal Technology.
®
Carrier-in-Carrier is a registered trademark of Comtech EF Data.
10–1
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
has been further refined, and some of the limitations that existed in the CDM-Qx
implementation have been overcome.
This innovative technology provides a significant improvement in bandwidth and power
utilization, beyond what is possible with FEC and modulation alone, allowing users to achieve
unprecedented savings. When combined with advanced modulation and FEC, it allows for multidimensional optimization:
•
Reduced operating expense (OPEX) – e.g., Occupied Bandwidth & Transponder Power;
•
Reduced capital expenditure (CAPEX) – e.g., Block Up Converter/High-Power Amplifier
(BUC/HPA) size and/or antenna size;
•
Increased throughput without using additional transponder resources;
•
Increased link availability (margin) without using additional transponder resources;
•
A combination of any of the above to meet different objectives.
Summary: When carriers share common bandwidth, up to 50% savings in transponder
utilization is possible.
10.3 Application Requirements
The following conditions are necessary in order to operate DoubleTalk Carrier-in-Carrier:
•
Link must be full duplex.
•
A CDM-625 must be used at the end of the link where the cancellation needs to take place.
•
The transponder is operated as Loopback. That is, each end of the link must be able to see a
copy of its own signal in the return (downlink) path from the satellite. The looped back
signal is then subtracted which leaves the signal from the distant end of the link. DoubleTalk
Carrier-in-Carrier cannot be used in spot beam systems.
•
The transponder needs to be “bent-pipe” – meaning no on-board processing, demodulation,
regeneration can be employed. Demodulation/remodulation does not preserve the linear
combination of the forward and return signals and the resulting reconstituted waveform
prevents recovery of the original constituent signals.
Figure 10-1 shows a simplified conceptual block diagram of CnC processing. The two ends of the
link are denoted ‘A’ and ‘B’ and the uplink and downlink are shown.
10–2
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
Figure 10-1. Conceptual Block Diagram
This performance is achieved through advanced signal processing algorithms that provide
superior cancellation while tracking and compensating for the following common link
impairments:
1. Time varying delay: In addition to the static delays of the electronics and the round-trip
delay associated with propagation to the satellite and back, there is a time-varying
component due to movement of the satellite. The CnC module tracks and compensates for
this variation.
2. Frequency offset and drift: Common sources are satellite Doppler shift, up and down
converter frequency uncertainties, and other drift associated with the electronics in the
CDM-625 itself. The CnC module tracks and compensates for this frequency offset and drift.
3. Atmospheric effects: Fading and scintillation can affect amplitude, phase, and spectral
composition of the signal and the degree to which it correlates with the original signal. The
CnC module tracks and compensates for these atmospheric related impairments.
4. Link Asymmetries: Various asymmetries in the forward and return link can produce
differences in the relative power of the two received signal components. These can be both
deterministic (static) or random (and time varying). An example of the former would be the
10–3
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
differences resulting from antenna size/gain variations between the two ends of the link. An
example of the latter would be transient power differences due to different levels of
atmospheric fading in the uplinks. CnC compensates for the asymmetries, up to a certain
extent.
In a number of ways, CnC carriers behave similar to conventional carriers in satellite links. They
are both exposed to adjacent carriers, cross-polarization and rain fade, and exhibit impairments
when any of these become too great. In addition, CnC operates in an environment where:
•
Carriers intentionally occupy the same spectral slot;
•
Performance depends upon desired and co-located interfering carrier.
10.3.1
Operational Recommendations
The rules for CnC operation are summarized as follows:
•
Both earth stations share the same footprint so each sees both carriers
•
CnC carriers are operated in pairs
•
One outbound with multiple return carriers is not allowed
•
Asymmetric data rates are allowed (no restrictions)
•
The ratio of power spectral density is normally less than 11 dB
•
CnC operates with modems – not modulators only or demodulators only
In addition, to minimize ‘false’ acquisition, observe the following:
•
Use of IESS-315 V.35 Scrambler is highly recommended
•
Keep the search delay range as narrow as possible – once the modem has reported the
search delay, narrow the search delay range to the nominal reported value ±5 ms – for
example, if the modem reported delay is 245 ms, narrow the search range to say 240-250
ms
•
Use external data source (e.g. Firebird) or internal BER tester when testing Carrier-in-Carrier
performance
•
To prevent self-locking in case the desired carrier is lost, it is recommended that the two
carriers have some configuration difference – for example, use different settings for
Spectrum Inversion
10–4
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
10.4 System Functionality and Operational Considerations
Figure 10-2 illustrates a conventional, full duplex satellite link where two carriers are placed in
non-overlapping channels. Figure 10-3 shows the same link using the CDM-625 equipped with
the DoubleTalk Carrier-in-Carrier option. Note that only 50% of the bandwidth is being used, as
both carriers are now occupying the same bandwidth.
The transponder downlinks the composite signal containing both carriers on the same band to
the CDM-625 which then translates the signal to near baseband where it can be filtered
(decimated) and then processed as a complex envelope signal. The CDM-625 then suppresses
the version of the near end carrier on the downlink side and then passes the desired carrier to
the demodulator for normal processing.
To further illustrate, as shown in Figure 10-4, without DoubleTalk Carrier-in-Carrier, the two
carriers in a typical full duplex satellite link are adjacent to each other. With DoubleTalk Carrierin-Carrier, only the composite signal is visible when observed on a spectrum analyzer. Carrier 1
and Carrier 2, shown here for reference only, are overlapping, thus sharing the same spectrum.
Figure 10-2. Conventional FDMA Link
10–5
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
Figure 10-3. Same Link Using CDM-625 and DoubleTalk Carrier-in-Carrier
Figure 10-4. Duplex Link Optimization
The CDM-625 CnC module operates on the near-zero signal before the demodulator, and is
waveform agnostic. This means that no prior knowledge of the underlying modulation, FEC, or
any other waveform specific parameter is required in order to perform the signal suppression
operation. The only caveat to this is that the waveform must be sufficiently random.
Because acquiring the delay and frequency offset of the interfering carrier is fundamentally a
correlation operation, anything deterministic in the interfering carrier (within the correlation
window of the algorithm) will potentially produce false correlation peaks and result in incorrect
delays and/or frequency. Normally, this is not a problem, since energy dispersal techniques are
utilized in the vast majority of commercial and military modems. However, it is something that
10–6
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
must be kept in mind when troubleshooting a system that utilizes the DoubleTalk Carrier-inCarrier technique for signal suppression.
One possible way to mitigate false peaks is to narrow the correlation window. For example, if
the delay is known to be around 240ms, set the minimum search delay to 230ms and the
maximum search delay to 250ms.
As all advances in modem technologies – including advanced modulation and FEC techniques –
approach their theoretical limits of power and bandwidth efficiencies, DoubleTalk Carrier-inCarrier allows satellite users to achieve spectral efficiencies (bps/Hz) that cannot be achieved
with modulation and FEC alone. Table 10-1 illustrates how DoubleTalk Carrier-in-Carrier, when
used with 16-QAM, approaches the bandwidth efficiency of 256-QAM (8bps/Hz).
Table 10-1. Spectral Efficiency using DoubleTalk Carrier-in-Carrier
Modulation
and Code Rate
Spectral Efficiency (bps/Hz)
TraditionalSCPC
Carrier-in-Carrier
BPSK 1/2
0.50
1.00
QPSK 1/2
1.00
2.00
QPSK 2/3
1.33
2.67
QPSK 3/4
1.50
3.00
QPSK 7/8
1.75
3.50
8-QAM 2/3
2.00
4.00
8-QAM 3/4
2.25
4.50
8-QAM 7/8
2.63
5.25
16-QAM 3/4
3.00
6.00
16-QAM 7/8
3.50
7.00
As shown here, DoubleTalk Carrier-in-Carrier allows equivalent spectral efficiency using a lower
order modulation and/or FEC Code Rate; CAPEX is therefore reduced by allowing the use of a
smaller BUC/HPA and/or antenna. And, as DoubleTalk Carrier-in-Carrier can be used to save
transponder bandwidth and/or transponder power, it can be successfully deployed in
bandwidth-limited as well as power-limited scenarios.
10.4.1
DoubleTalk Carrier-in-Carrier Cancellation Process
The state-of-the-art signal processing technology employed via DoubleTalk Carrier-in-Carrier
continually estimates and tracks all parametric differences between the local uplink signal and
its image within the downlink. Through advanced adaptive filtering and phase locked loop
implementations, it dynamically compensates for these differences by appropriately adjusting
the delay, frequency, phase and amplitude of the sampled uplink signal, resulting in excellent
cancellation performance.
When a full duplex satellite connection is established between two sites, separate satellite
channels are allocated for each direction. If both directions transmitted on the same channel,
each side would normally find it impossible to extract the desired signal from the aggregate due
10–7
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
to interference originating from its local modulator. However since this interference is produced
locally, it is possible to estimate and remove its influence prior to demodulation of the data
transmitted from the remote location.
For the DoubleTalk Carrier-in-Carrier cancellation, it is necessary to provide each demodulator
with a copy of its local modulator’s output.
Referring to Figure 10-5: Modem 1 and Modem 2 transmit signals S1 and S2 respectively. The
satellite receives, translates, and retransmits the composite signal. The downlink signals S1* and
S2*, received at Modem 1 and Modem 2 differ from the transmit signals primarily in terms of
phase, frequency, and delay offsets.
Figure 10-5. DoubleTalk Carrier-in-Carrier Signals
Referring to Figure 10-6: For round trip delay estimation, a search algorithm is utilized that
correlates the received satellite signal to a stored copy of the local modulator’s transmitted
signal. The interference cancellation algorithm uses the composite signal and the local copy of
S1 to estimate the necessary parameters of scaling (complex gain/phase), delay offset and
frequency offset. The algorithm continuously tracks changes in these parameters as they are
generally time-varying in a satellite link.
Figure 10-6. Carrier-in-Carrier Signal Processing Block Diagram
The resulting estimate of the unwanted interfering signal is then subtracted from the composite
signal. In practical applications, the estimate of the unwanted signal can be extremely accurate.
10–8
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
Unwanted interfering signal suppression of 30 dB or more has been achieved in commercial
products with minimal degradation of the demodulator performance.
10.4.2
Margin Requirements
Typical interfering signal cancellation is 28 to 35 dB (depending on the product). The residual
interfering signal appears as noise causing a slight degradation of the Eb/No. To compensate for
the residual noise, a small amount of additional link margin is required to maintain the BER.
Margin requirements depend on the product, modulation and power ratios:
For the CDM-625, the additional margin requirements are as follows:
10.4.3
Modulation
Nominal Margin*
BPSK
0.3 dB
QPSK/OQPSK
0.3 dB
8-PSK
0.5 dB
8-QAM
0.4 dB
16-QAM
0.6 dB
* Equal power and equal symbol rate for the
interfering carrier and the desired carrier, i.e., 0 dB
PSD ratio. Measured at IF with AWGN, +10 dBc
Adjacent Carriers, 1.3 spacing.
Carrier-in-Carrier Latency
Carrier-in-Carrier has no measurable impact on circuit latency.
10.4.4
Carrier-in-Carrier and Adaptive Coding and Modulation
Carrier-in-Carrier is fully compatible with VersaFEC Adaptive Coding and Modulation (ACM)
mode of operation in the CDM-625.
Carrier-in-Carrier combined with VersaFEC ACM can provide 100-200% increase in average
throughput.
10.4.5
Carrier-in-Carrier Link Design
Carrier-in-Carrier link design involves finding the FEC and modulation combination that provides
optimal bandwidth utilization. Just like conventional link design, it is an iterative process that
involves trying different FEC and modulation combinations with Carrier-in-Carrier until an
optimal combination is found.
For optimal Carrier-in-Carrier performance, it is recommended that the two carriers have similar
symbol rate and power. This can be achieved by selecting appropriate ModCods as shown in
following sections.
10–9
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
10.4.5.1
Revision 15
MN-CDM625
Symmetric Data Rate Link
Consider the following example:
Satellite & Transponder
Galaxy 18 @ 123º W, 13K/13K
Earth Station 1
Phoenix, AZ – 4.6 m
Earth Station 2
Phoenix, AZ – 2.4 m
Data Rate
512 kbps / 512 kbps
The traditional link was based on QPSK TPC 3/4 and required 0.96 MHz of leased BW. The LST 2
summary for the traditional link is as follows:
Carrier-in-Carrier link design involved trying different Modulation & FEC Code Rates to find the
optimal combination:
•
8-QAM, LDPC 2/3 with Carrier-in-Carrier
•
QPSK, LDPC 3/4 with Carrier-in-Carrier
•
QPSK, LDPC 2/3 with Carrier-in-Carrier
•
QPSK, LDPC 1/2 with Carrier-in-Carrier
2
LST is Intelsat’s Lease Transmission Plan Program.
10–10
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
Link parameters and LST summary for QPSK, LDPC 2/3 with Carrier-in-Carrier is as follows:
10–11
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
The link budget summary for the different ModCod combinations is as follows:
Allocated
BW (MHz)
PEB (MHz)
Leased BW
(MHz)
Savings Compared
to Original
PSD
Ratio
(dB)
8-QAM, LDPC 2/3
0.3584
1.1468
1.1468
-20%
2.1
QPSK, LDPC 3/4
0.47785
0.6734
0.6734
30%
2.1
3
QPSK, LDPC 2/3
0.53735
0.5777
0.5777
40%
2.1
4
QPSK, LDPC 1/2
0.7168
0.5184
0.7168
25%
2.1
S. No.
Modulation & FEC
1
2
Based on this analysis, QPSK, LDPC 2/3 with Carrier-in-Carrier provides the maximum savings of
40%. In addition to 40% reduction in Leased Bandwidth, using Carrier-in-Carrier also reduced the
required HPA Power by almost 40%:
10.4.5.2
HPA Power
Traditional Link
(QPSK, TPC 3/4)
CnC Link
(QPSK, LDPC 2/3)
HPA Power Reduction
HPA @ 4.6 m
0.7 W
0.5 W
40%
HPA @ 2.4 m
1.5 W
1.1 W
36%
Asymmetric Data Rate Link
As occupied (or allocated) bandwidth of a Carrier-in-Carrier circuit is dictated by the larger of the
two carriers, it is strongly recommended that the smaller carrier be spread as much as possible
using a lower order modulation and/or FEC, while meeting the PSD ratio spec. Spreading the
smaller carrier using a lower order modulation has multiple benefits:
•
Lower order modulation is always more robust;
•
Lower order modulation uses less transponder power – this reduces total transponder, and
increases available link margin;
•
Lower order modulation uses less transmit power on the ground – this can significantly
reduce the BUC/SSPA size by not only reducing the transmit EIRP, but also reducing the
BUC/SSPA backoff
Consider the following example:
Satellite & Transponder
IS-901 @ 342º W, 22/22 (EH/EH)
Earth Station 1
Africa – 4.5 m
Earth Station 2
Africa – 3.0 m
Data Rate
3000 Mbps / 1000 Mbps
While the traditional link was based on QPSK, TPC 3/4 and required 3.9 MHz of leased
bandwidth, the Carrier-in-Carrier link was based on QPSK, LDPC 3/4 and QPSK, LDPC 1/2 and
required 2.8 MHz of leased bandwidth.
10–12
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
The savings summary is as follows:
Item
Data Rate (kbps)
Modulation
FEC
Occupied BW
(MHZ)
Power Eq. BW
(MHz)
Leased BW (MHz)
Hub HPA (W)
Remote HPA (W)
Original Link
Hub to
Remote to
Remote
Hub
3000
1000
QPSK
QPSK
TPC 3/4
TPC 3/4
Total
With Carrier-in-Carrier and LDPC
Hub to
Remote to
Total
Remote
Hub
3000
1000
QPSK
QPSK
LDPC 3/4 LDPC 1/2
2.8
0.9
3.7
2.8
1.4
2.8
3.3
0.6
3.9
3.9
2.5
0.3
2.8
2.8
26.0
10.6
Savings
20.3
6.4
27.5%
22%
40%
If this link was designed using QPSK, LDPC 3/4 in both directions, it would have required:
Occupied BW
2.8 MHz
Power Eq. BW
3.0 MHz
7.2% increase in Power Eq. BW
Leased BW
3.0 MHz
7.2% increase in Leased BW
Hub HPA
20.3 W
Remote HPA
8.3 W
30% increase in Remote power
10.4.5.3 Power Limited Links
Carrier-in-Carrier can provide substantial savings even when the original link is power limited.
Spreading the carrier by using a lower modulation and/or FEC along with latest FEC such as
VersaFEC can substantially reduce the total power, which can then be traded with bandwidth
using Carrier-in-Carrier. The concept is illustrated with the following examples:
The conventional link is using 8-PSK, TPC 3/4:
Switching to VersaFEC and using a lower order modulation – e.g., QPSK,
VersaFEC 0.803 increases the total occupied bandwidth, while reducing
the total power equivalent bandwidth:
Now using DoubleTalk Carrier-in-Carrier, the second QPSK, VersaFEC
0.803 carrier can be moved over the first carrier – thereby significantly
reducing the total occupied bandwidth and total power equivalent
bandwidth when compared to the original side-by-side 8PSK, TPC 3/4
carriers:
10–13
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
To continue, consider this example:
Satellite & Transponder
IS-901 @ 342º W, 22/22 (EH/EH)
Earth Station 1
Africa – 9.2 m
Earth Station 2
Africa – 4.5 m
Data Rate
2.048 Mbps / 2.048 Mbps
Whereas the original link used 8-PSK TPC 3/4, the Carrier-in-Carrier link used QPSK VersaFEC
0.803. The savings summary is as follows:
Item
Hub to
Remote
2048
8-PSK
TPC 3/4
Original Link
Remote to
Hub
2048
8-PSK
TPC 3/4
Total
With Carrier-in-Carrier and VersaFEC
Hub to
Remote to
Total
Remote
Hub
2048
2048
QPSK
QPSK
0.803
0.803
Data Rate (kbps)
Modulation
FEC
Occupied BW
(MHZ)
1.3
1.3
2.6
1.8
Power Eq. BW
(MHz)
2.2
1.0
3.2
1.1
Leased BW (MHz)
3.2
Hub HPA (W)
5.0
Remote HPA (W)
11.6
Note: 1 dB HPA BO for QPSK, 2 dB HPA BO for 8-PSK, 1 dB Feed Loss.
1.8
1.8
0.5
1.6
1.8
2.0
4.7
Savings
44%
60%
60%
Using Carrier-in-Carrier and VersaFEC reduced the leased bandwidth by almost 44% and HPA
power by 60%.
10–14
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
10.4.6
Revision 15
MN-CDM625
Carrier-in-Carrier Commissioning and Deployment
Prior to commissioning a Carrier-in-Carrier link, it is critical that the link is fully tested in non
Carrier-in-Carrier mode and all system issues including external interference, antenna pointing,
cabling, SSPA backoff are resolved. Only after the link is robust, should you attempt turning on
Carrier-in-Carrier.
Do these steps for Carrier-in-Carrier commissioning and deployment:
Step
1
Task
Turn ON the carrier at Site A. Carrier from Site B is OFF. CnC function is OFF at both sites.
 Using a spectrum analyzer, measure Co+No/No at the input to the modem at Site A.
 Using a spectrum analyzer, measure Co+No/No at the input to the modem at Site B.
 Measure/record Eb/No at Site B. Make sure there is sufficient margin to account for
CnC.
 Measure/record Receive Signal Level (RSL) at Site B.
2
Turn OFF the carrier at Site A. Turn ON the carrier at Site B. CnC function is OFF at both sites.
 Using a spectrum analyzer, measure Co+No/No at the input to the modem at Site A.
 Using a spectrum analyzer, measure Co+No/No at the input to the modem at Site B.
 Measure/record Eb/No at Site A. Make sure there is sufficient margin to account for
CnC.
 Measure/record RSL at Site B.
3
Using Co+No/No readings calculate PSD ratio at Site A and Site B. If it is not within
specification, make necessary adjustments to bring it within specification and repeat
measurements in Step (1) and (2).
 Also verify that the RSL is within spec.
4
Now without changing the transmit power levels, turn ON both the carriers (on the same
frequency) and turn CnC ON.
 Measure/record Eb/No at Site A and B.
 Measure/record RSL at Site A and B.
 Now compare Eb/No in presence of 2 over lapping carriers with CnC with Eb/No when
only 1 carrier was ON. Eb/No variation should be within spec for that modulation, FEC
and PSD ratio.
5
The test can be repeated for different PSD ratio and Eb/No.
10–15
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
10.4.7
Revision 15
MN-CDM625
Validate Carrier-in-Carrier Performance
Carrier-in-Carrier performance can be easily validated by verifying that Eb/No degradation due
to Carrier-in-Carrier is within published specification for the observed Power Spectral Density
Ratio.
Do these steps to validate Carrier-in-Carrier performance:
Step
Task
1
Setup a conventional side-by-side link of the desired Eb/No:
 Carrier-in-Carrier should be OFF.
 Record the Eb/No as displayed by the Modems.
 Observe the 2 carriers on a spectrum analyzer and record the PSD ratio.
Example Link:
• Full duplex 512 kbps, QPSK, LDPC 2/3 circuit between 4.6 m and 2.4 m antennas
• Recorded Eb/No = 2.6 dB (at both modems)
• PSD Ratio = 1.2 dB (measured at larger Antenna)
2
Now relocate one of the carriers on top of the other carrier:
 Enable Carrier-in-Carrier.
 Record the Eb/No as displayed by the Modems.
3
Calculate change in Eb/No and verify against specification.
Example Link:
• Recorded Eb/No = 2.4 dB
• Change in Eb/No = 0.2 dB
• Eb/No Degradation (Spec.) at 1.2 dB PSD = 0.3 dB
• Modem performance is within spec
10–16
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
10.5 Operational References
10.5.1
Calculate Carrier-in-Carrier Link Budget
Do these steps to calculate the link budget for a Carrier-in-Carrier Link:
Step
Task
1
Calculate the link budget for both carriers in the duplex link, with required CnC margin:
2
Verify that the PDS ration is within spec for the CDM-625.
3
Calculate the Allocated Bandwidth (BW) and Power Equivalent Bandwidth (PEB) for the duplex
link:
• BWDuplex Link = Greater of (BWCarrier 1, BWCarrier 2)
• PEBDuplex Link = PEBCarrier 1 + PEBCarrier 2
• Leased BWDuplex Link = Greater of (BWDuplex Link, PEBDuplex Link)
4
For an optimal link, the Leased Bandwidth and the Power Equivalent Bandwidth should be
equal / nearly equal.
5
Repeat the link budget process by selecting different Modulation and FEC, until the BW and
PEB is nearly balanced.
10–17
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
10.5.2
Revision 15
MN-CDM625
Methods to Use to Estimate PSD Ratio
10.5.2.1 Use Downlink EIRP and Symbol Rate
Use Downlink EIRP and Symbol Rate to estimate the PSD Ratio from a link budget:
PSD = Downlink EIRP – 10 * Log (Symbol Rate)
PSD Ratio Example:
Carrier
A to B
B to A
Downlink EIRP
27 dBW
24 dBW
Symbol Rate
500 ksps
375 ksps
PSD Ratio (@ A) = -29.99 – (-31.74) = 1.75 dB
PSD Ratio (@ B) = -31.74 – (-29.99) = -1.75 dB
10.5.2.2
Use LST
10–18
Power Spectral Density
-29.99 dBW/Hz
-31.74 dBW/Hz
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
10.5.2.3
Use SatMaster
10.5.2.4
Use a Spectrum Analyzer
Revision 15
MN-CDM625
You may use a Spectrum Analyzer capable of integrating the signal power in a given bandwidth
to estimate PSD Ratio or CnC Ratio:
CnC Ratio (in dB) = PowerC1 (in dBm) – PowerC2 (in dBm)
PSD Ratio (in dB) = (PowerC1 – 10 log BWC1 (in Hz)) – (PowerC2 – 10 log BWC2 (in Hz))
= CnC Ratio – 10 log (BWC1 / BWC2)
If the two carriers have same Symbol Rate / Bandwidth, then the CnC Ratio is same as the PSD
Ratio.
10–19
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
10.6 Carrier-in-Carrier Automatic Power Control (CnC-APC)
10.6.1
About CnC-APC
A number of Comtech EF Data modems, including the CDM-625, offer Automatic Uplink Power
Control (AUPC) to mitigate the effects of rain fading and other link impairments.
It is important to note that the simple system employed in AUPC (whereby distant-end Eb/No is
monitored, and local power is increased when a degraded link is detected) has an undesirable
characteristic, which leads to some operators not permitting its use on their transponders: The
inability of ‘classic’ AUPC to determine at which side of link the fade (or other impairment) has
occurred. More specifically:
•
If the fade is at the local side, all is well – the drop in Eb/No at the distant site corresponds
exactly to the drop in power (due to excess attenuation) on the local uplink; when uplink
power is increased, the power at the transponder does not exceed its clear-sky value.
•
Conversely, if the fade occurs at the distant side, the AUPC system increases power in
exactly the same way – but now, there is no excess uplink attenuation and, as a result, the
clear-sky power at the satellite will be exceeded.
In a transponder with many carriers using AUPC, a fade event at the ‘wrong’ side can cause
many carriers to simultaneously increase power beyond their authorized maximums, leading to
intermod problems, adjacent channel interference (ACI) issues, and in some extreme cases,
saturation of the transponder.
When considering power control in the Carrier-in-Carrier case, not only must the issue of
exceeding allocated power limits be respected, but the problem of driving CnC ratios outside
working limits during fading must also be taken into account.
10.6.2
AUPC and Carrier-in-Carrier in the CDM-625
The CDM-625 currently permits ‘classic’ AUPC when Carrier-in-Carrier mode is in operation, but
this does nothing to stop the problem of exceeding power limits when the fade is on the ‘wrong’
side. To limit the impact of this, you are constrained to 3 dB of permitted power increase.
Depending on the satellite band, and the depth and rapidity of the fade, this constraint may
curtail the effectiveness of the system.
10.6.3
The CnC Automatic Power Control Algorithm
In addressing the shortcomings of ‘classic’ AUPC, from its studies of the unique problems of
power control in CnC systems, Comtech EF Data has determined that there is sufficient
information available (CnC ratio, power level, Eb/No, RSL, etc.) on the local and distant sides to
control power at each end without exceeding the total composite power allocated to each
carrier in the CnC pair. Furthermore, the power control algorithm developed by Comtech EF
Data ensures that the CnC ratio remains within the correct working range.
10–20
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
As a recap, consider the following diagram:
Whenever power is adjusted on Carrier 1, the power in Carrier 2 needs to be adjusted so the
composite carrier power remains constant (or does not exceed its allocated limit), while keeping
the CnC ratio within limits.
There are two distinct phases to the CnC-APC algorithm:
1. In order for the CnC-APC algorithm to work effectively, it must first analyze the CnC Ratio
and Eb/No margins on each side of the link, and based on the starting conditions, redistribute power between the two ends so that good protection against fades can be
achieved. This process is referred as re-balancing, and is done so that total composite power
(TCP) in the two carriers remains constant (within ±0.5 dB).
In this process, both sides of the link calculate power changes, based on their ability to see
not only local parameters, including CnC Ratio, Eb/No, Receive signal level, power level and
max power increase, but those of the modem at the other end of the link. After these
calculations are performed, a comparison of the results is performed, and if they are in close
agreement, the power changes are implemented.
It may not always be possible to drive the powers to an optimum point. The calculations
take into account:
•
The minimum and maximum power levels possible in the modem (which is affected by
the operating band – 70/140 MHz IF versus L-Band).
•
If the user-programmed value that determines the maximum permitted increase in Tx
power for the terminal would be exceeded. This is a very important value, and you
must know exactly how far from compression his transmit RF chain is operating. As an
example, if, under normal clear sky conditions, you determine that the backoff from
compression is -3 dB, and under no circumstances must the RF chain ever go past -1 dB,
the maximum power increase that can be permitted is 2 dB. You enter this into the
CDM-625 as a setup parameter. If this value is ignored, or incorrectly entered,
compression or saturation could occur, either during the initial rebalance, or during a
fade event. This parameter is referred to as TPLImax (Transmit Power Level Increase,
max).
10–21
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
•
If the power changes calculated would put the CnC Ratio out of its working range.
•
If the Rx signal level is above its minimum level – if it is not, the CnC Ratio monitor will
not be accurate, which is essential correct calculations.
•
If the power change would result in the Eb/No margin on either side becoming negative
(see below).
At the end of the rebalance procedure, the modem will display the result:
 Full rebalance.
 Partial rebalance.
 Some issue was found that prevents a rebalance.
In the case of a partial or no rebalance, the modem displays the reason for this result; you
can then adjust an operating parameter and try again.
CAUTION – READ THESE IMPORTANT NOTES:
•
You should be aware that after the rebalance has been carried out, it is
very likely that the CnC Ratio will not be at 0dB, and the Eb/No margins will
not be equal. This is particularly true for cases where there is an asymmetry
in antenna size, terminal G/T, symbol rate etc. This is an inherent function
of the re-balancing algorithm, and is not a cause for concern.
•
You should only attempt to do a rebalance if it is known with certainty that
there are CLEAR SKY conditions at BOTH SIDES OF THE LINK.
It is not necessary for there to be a person at each end – the rebalance can
be initiated from either side, with the other side unattended.
Following the rebalance, the CDM-625 stores key parameters, such as Tx Power level, that
are referred to as the Home State. In the event of a loss of communication between the two
sides, the modem will revert to Home State, which is a known safe condition that will not
cause TCP to be exceeded. Once the link conditions have improved so that communication is
re-established, CnC-APC will automatically re-activate.
2. In the second phase of the algorithm, Eb/No, CnC ratio, and RSL are continuously
monitored. For every combination of the modulation, FEC type and FEC code rate, the
modem calculates an Eb/No margin. An Eb/No margin of 0 dB is arbitrarily determined to
be the Eb/No value that produces a BER of 1 x 10-7 at the output of the decoder, plus 1 dB.
If the algorithm senses that Eb/No margin is dropping, power is increased at one or both
ends of the link, but in a manner that ensures that TCP is not exceeded. In the vast majority
of cases the TCP during a fade will not exceed its clear-sky value by more than +0.5 dB.
10–22
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
The algorithm uses a number of inputs, from both sides of the link, including a knowledge of
the satellite band in use (which you are required to know at the time of set-up). The
characteristics of rain fading changes with frequency, and there are different models for
C-Band, X-Band, Ku-Band, and Ka-Band. Not only does downlink attenuation vary as a
function rain rate, but in some cases (depending on the G/T of the terminals at each end,
and the satellite transponder itself) may be dominated by an increase in receive noise
temperature when the antenna is pointing through rain and clouds, rather than ‘cold’ sky.
The depth of fade that the CnC-APC algorithm can tolerate is highly dependent on a number
of factors, including:
10.6.4
•
The CnC Ratio and Eb/No margins following a rebalance. In general, with a highly
asymmetric link, where CnC Ratio is not close to zero, the tolerance to fade depth on
one side will be less than the other.
•
The maximum permitted level of power increase that you have defined. If, for example,
you have programmed a TPLImax value of 2 dB (because that’s the only headroom the
RF chain has) you should not expect the link to tolerate a fast 10 dB fade at Ku-Band.
CnC-APC Framing
In order to provide a two-way communications link between the two ends, CnC-APC requires an
overhead channel (very much like EDMAC, or one of its variants, which is used in AUPC).
Recognizing that this overhead needs to have a minimal impact on occupied bandwidth and
Eb/No performance, the overhead has been kept as low as possible:
•
The overhead rate is fixed at 0.5%, causing the symbol rate of the carrier to grow by an
almost imperceptible amount (no need to re-calculate channel spacing) and causing a loss of
Eb/No performance of only 0.02dB.
•
This choice of overhead rate effectively gives you the functionality of the CnC-APC channel
without having to pay a penalty in power or bandwidth – it’s essentially free.
The CnC-APC channel constantly passes a number of metrics and parameters, including CnC
Ratio, Eb/No, Receive signal level, power level and max power increase, as well as information
required for the initial set-up, including the modem operating band (L-Band or 70/140 MHz),
and the satellite band in use.
In addition to the information fields in the frame, there is a control field that permits commands
to be sent from one side or the other during initial re-balancing, and re-balancing during fade
events.
Note that the CnC-APC frame size (and the latency associated with it) limits the lower end of the
range of bit rates that are supported to 64 kbps. If you select the CnC-APC mode at a data rate
below 64 kbps, an error message will be generated if a rebalance operation is requested.
10–23
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
10.6.4.1 CnC-APC Framing and the Self-Locking Problem
Self-locking is a problem that has been previously reported to Comtech EF Data Product Support
on CnC links that have identical data rates, FEC and modulation.
In the case where both ends of the link are up and running, the CnC canceller performs as
intended. However, if the carrier at the remote side stops transmitting a carrier, the CnC
canceller will still cancel the interferer (its own outbound Tx signal), but the cancelation is not
perfect (it may be in the order -30 dB) and hence a weak signal appears at the input to the
demodulator that, because of the correct settings of data rate, FEC and modulation, is
sometimes acquired by the demod. This can sometimes be an issue because, although the Tx
carrier from the distant side is not transmitting, no demodulator alarm is generated and hence
the local end is not alerted – and data being transmitted is looped back to the receiver, and back
into the network.
The use of CnC-APC framing provides the means to eliminate the self-locking problem. Rather
than having an identical framing structure for the local and distant sides of the link, by
designating each side as Side A and Side B, each side has a different framing structure and is
therefore non-identical and incompatible. This makes it impossible for a modem in this CnC
mode to lock to itself. With this approach, there is no ‘master-slave’ relationship – both sides
are peers, and either side can be designated as A or B.
10.6.5
CnC-APC Response Time
After CnC-APC is activated, power may be modified at a rate that does exceed once every 1.75
seconds. This rate has been determined by taking into account the round trip satellite delay, the
time taken to accurately determine CnC Ratio and Eb/No following a power adjustment, and the
latency of the CnC-APC frame itself. The overall response time of the control system is therefore
limited by these factors, and deep fading events that exceed approximately 1 dB/second are
likely to be too fast for CnC-APC (or any other ‘classic’ scheme) to respond to. Users should bear
in mind that these limitations in response time are inherent in schemes involving round-trip
delays from geostationary satellites.
10.6.6
CnC-APC Setup
CAUTION – This procedure should be done only when there are CLEAR SKY conditions
at both ends of the link.
To set up CnC-APC, carefully follow and understand these steps:
1. Set up the CnC link in ‘normal’ mode according to the instructions earlier in this chapter, and
according to an appropriately calculated link budget.
The initial selection of CnC-APC normally requires that a person be present at both ends, to
coordinate the change of CnC from ‘normal’ to CnC-APC mode. Alternately, if an IP
10–24
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
connection is available to the distant end that does not depend on the satellite link for
primary connectivity, the setup can be performed remotely.
Once the link is established, a further rebalance, activation or suspension does not require
another person to be present, or independent remote IP access.
2. Once the ‘normal’ CnC link has been established, determine that the link is stable and that it
has an acceptable link margin at both ends.
3. Decide, arbitrarily, which is Side A, and which is Side B.
4. From the CDM-625 front panel, select the CONFIG  CnC  Mode menu:
CnC Mode: APC,Side A,C-Band
(Off, On, APC)
Activate? N (Y,N) APC is not active
()
On the top line, use the ▲▼ arrow keys to select the appropriate CnC operating mode.
Available selections are:
• Off
• APC,Side A,X-Band
• APC,Side B,C-Band
• APC,Side B,Ka-Band
• On (normal)
• APC,Side A,Ku-Band
• APC,Side B,X-Band
• APC,Side A,C-Band
• APC,Side A,Ka-Band
• APC,Side B,Ku-Band
If it is not known which satellite band is being used, no attempt should be
made to engage CnC-APC.
Once the mode has been selected, press ENTER – do not select Activate (on the bottom
line) yet. Note the following:
•
If Side A is selected at both sides, or Side B is selected at both sides, both modems
will display a Frame Sync fault (under Rx faults). No further action is possible until
this error has been corrected.
•
If different satellite bands are selected on each side (for instance, Side A is Ku-Band,
while side B is C-Band) the modem will display an APC Band Mismatch fault (under
Rx faults). No further action is possible until this error has been corrected.
5. Based on the known RF terminal equipment in use, determine a value for the maximum
allowed power increase (TPLImax) and then set this value. From the CDM-625 front panel,
select the CONFIG Tx  Power menu:
Output Power Mode = CnC-Auto-Power-Control
Level = -25.0dBm MaxPwrIncrease=2.5dB ()
10–25
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
On the bottom line, to edit the power output level and the maximum permitted increase in
power level when in APC Mode: Use the ◄ ► arrow keys to select a digit to edit, and then
use the ▲▼ arrow keys to change the value of that digit. Press ENTER when done.
Note that when APC is in an active state, the value of the power level displayed in the
bottom left will show ‘AUTO’.
6. Go back to the SELECT: CONFIG CnC  MODE menu. On the bottom line, which will be
displaying Activate? N (Y,N), use the ▲▼ arrow keys to select Y(Yes)and then
press ENTER.
The modem display will update, similar to the following example:
The CnC Mode: APC,Side A,C-Band (Off, On, APC)
Suspend? N (Y,N) OK-ReBalance Done
()
The message on the bottom line can be any one of the following:
Displayed Message
Expanded Meaning
OK-ReBalance Done
Full rebalance was achieved
OK(P)CnCRatio Lim
OK(P)-LocalPwr Min
OK(P)-LocalPwr Max
OK(P)-LocalPwr Lim
OK(P)-DistPwr Min
OK(P)-DistPwr Max
OK(P)-DistPwr Lim
OK(P)-Incomplete
No APC Frame Sync
Locl EbNo too high
Dist EbNo too high
DistEnd ReBal fail
DistEnd NoResponse
Fail-CalcMismatch
CnC Ratio too high
LoclMargin too low
DistMargin too low
Rx DataRate<64kbps
Rx DataRate<64kbps
Partial rebalance, limited by CnC ratio approaching its working limit
Partial rebalance, limited by local power approaching its lower limit
Partial rebalance, limited by local power approaching its upper limit
Partial rebalance, limited by local power approaching TPLImax
Partial rebalance, limited by distant power approaching its lower limit
Partial rebalance, limited by distant power approaching its upper limit
Partial rebalance, limited by local power approaching TPLImax
Partial rebalance, algorithm did not fully converge
Communication not possible – no APC frame sync
The local Eb/No is too high (>16 dB) to determine rebalance params
The distant Eb/No is too high (>16 dB) to determine rebalance params
The distant end failed to rebalance
The distant end failed to respond
No Rebalance - the solution calculated by each end does not match
The CnC ratio is too high (>9 dB) for re-balancing to be attempted
There is insufficient local Eb/No margin for an APC rebalance
There is insufficient local Eb/No margin for an APC rebalance
The Rx data rate needs to be 64 kbps or higher for APC
The Tx data rate needs to be 64 kbps or higher for APC
10–26
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
Displayed Message
Expanded Meaning
Local RSL too low
The local RSL is below the minimum for the operating symbol rate
Dist RSL too low
The distant RSL is below the minimum for the operating symbol rate
If the message shown begins with OK, then after approximately 5 seconds, the display
changes as per the following example:
The CnC Mode: APC,Side A,C-Band (Off, On, APC)
Suspend? N (Y,N) APC is active
()
At this point, as indicated on the bottom line of the display, CnC-APC is active.
To suspend CnC-APC at any time: On the bottom line, which will be displaying Suspend?
N (Y,N), use the ▲▼ arrow keys to select Y(Yes)and then press ENTER. The CnC-APC
status message on the bottom line of the display will update accordingly, as per the
following example:
The CnC Mode: APC,Side A,C-Band (Off, On, APC)
Activate? N (Y,N) APC is not active
()
Note that, when CnC-APC is suspended, it is de-activated on both sides.
If a message other than OK is displayed after attempting to perform a rebalance, the CnCAPC system will not activate, and you should correct the link conditions before reattempting to activate it.
CAUTION – READ THIS IMPORTANT NOTE:
When CnC-APC is active, you are not permitted to change configuration
parameters that potentially affect the operation of CnC-APC (modulation type,
FEC type, code rate, framing, etc). If you attempt to change one of these
parameters either locally or remotely, the change will not be accepted. In order
to change these configuration parameters, CnC-APC needs to be suspended first.
Following the changes, you should re-activate CnC-APC. Be aware that the reactivation will be preceded with a new rebalance operation.
10.6.7
CnC-APC Redundancy Support Notes
1. The initial release of the CnC-APC feature (in CDM-625 Firmware Version 2.0.2) fully
supports 1:1 redundancy. Note that, as is required with standard CnC 1:1 redundancy
operation, a PMSI cable is required to connect the two units in a 1:1 pair.
Sect. 5.2.1.8.4 CONFIG: CnC  PMSI-Control (Chapter 5. FRONT PANEL
OPERATION)
10–27
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
2. At this time, 1:N redundancy in the CRS-300/CRS-500 is not yet supported – a firmware
update for these switches will be available in the future. Please consult Comtech EF Data
Technical Support for updated information.
10.7 DoubleTalk Carrier-in-Carrier Specifications
Requires the two links to share a common carrier frequency (Outbound and Inbound symbol
rates do not have to be equal)
Power Spectral Density Ratio BSPK/QPSK/8-PSK/8-QAM: –7 dB to +11 dB (ratio of power spectral density, outbound
and CnC Ratio
interferer to desired inbound)
Operating Mode
16-QAM: –7 dB to +7 dB (ratio of power spectral density, outbound interferer to desired
inbound)
Note: With asymmetric carriers the absolute power ratio (or CnC ratio) would be different,
depending on the ratio of the symbol rates.
Example:
•
Outbound interferer = 1 Msymbols/sec
•
Desired Inbound = 500 ksymbols/sec
•
Ratio of power spectral density = +7 dB
Absolute power ratio (CnC Ratio) = +7dB + (10 log Outbound/desired symbol rate) = +10 dB
Maximum Symbol Rate Ratio 3:1 (TX:RX or RX:TX)
Inbound/Outbound
frequency uncertainty
Delay range
Eb/No Degradation
(equal Inbound/Outbound
power spectral density)
Monitor Functions
CnC Monitor Accuracy
Within the normal acquisition range of the demod, as follows:
•
Below 64 ksymbols/sec: ±1 to ±(Rs/2) kHz, where Rs = symbol rate in ksymbols/sec
•
Between 64 and 389 ksymbols/sec: ±1up to a maximum of ±32kHz
•
Above 389 ksymbols/sec: ±1 to ± (0.1Rs) kHz, up to a maximum of ±200 kHz
0-330 ms
•
BPSK = 0.3dB
•
QPSK = 0.3dB
•
OQPSK = 0.3dB
•
8-PSK = 0.5dB
•
8-QAM = 0.4dB
•
16-QAM = 0.6dB
For +10 dB power spectral density ratio (outbound interferer 10 dB higher than desired
inbound) add an additional 0.3 dB
•
Delay, in milliseconds
•
Frequency offset (between outbound interferer and desired inbound). 100 Hz resolution
•
CnC ratio, in dB (ratio of absolute power, outbound interferer to desired inbound)
±1.0 dB for symmetric symbol rate
10–28
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
10.8 Carrier-in-Carrier Summary
Comtech EF Data’s DoubleTalk Carrier-in-Carrier can provide significant savings in operational
expenses. The following should be considered when evaluating DoubleTalk Carrier-in-Carrier:
•
DoubleTalk Carrier-in-Carrier can only be used for full duplex links where the transmitting
earth station is able to receive itself.
•
DoubleTalk Carrier-in-Carrier can be used in both bandwidth limited and power limited
situations.
•
The maximum savings is generally achieved when the original link is symmetric in data rate.
10.9 Glossary
Bandwidth, Allocated or Occupied
Bandwidth or Allocated Bandwidth or Occupied Bandwidth is the frequency space required by a carrier on
a transponder.
For example: A Duplex 10 Mbps Circuit with 8PSK Modulation, FEC Rate 3/4 and 1.4 Spacing requires:
•
Allocated BW = (DR / SE) * CSF [(Data Rate / Spectral Efficiency) * Carrier Spacing Factor]
•
Allocated BW = 6.222 MHz = (10 / 2.25) * 1.4
For a 36 MHz transponder, 6.222 MHz corresponds to 17.3% Bandwidth Utilization.
Bandwidth, Leased (LBW)
Almost all satellite operators charge for the Leased Bandwidth (LBW). Leased Bandwidth or Leased
Resource is the greater of the Allocated Bandwidth and Power Equivalent Bandwidth.
For example: If a carrier requires 3 MHz of Allocated BW and 4.5 MHz of PEB, the Leased Bandwidth is 4.5
MHz
Bandwidth, Power Equivalent (PEB)
Power Equivalent Bandwidth (PEB) is the transponder power used by a carrier, represented as bandwidth
equivalent.
PEB Calculation Example:
•
Transponder EIRP = 37 dBW
•
Output Backoff (OBO) = 4 dB
•
Available EIRP = 37 – 4 = 33 dBW = 10
•
Transponder Bandwidth = 36 MHz
3.3
= 1995.26 Watts
10–29
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
•
Power Available / MHz = 1995.26 / 36 = 55.424 W
•
If a carrier uses 24 dBW, its PEB = 10
2.4
/ 55.424 = 4.532 MHz
This corresponds to 12.59% of available transponder power.
CnC Ratio
Ratio of Interfering Carrier Power to Desired Carrier Power (unit in dB).
The Interfering Carrier is the Tx Carrier from local modulator; the Desired Carrier is the carrier from the
distant end received by the local demodulator.
At the station transmitting C1: CnC Ratio (in dB) = PowerC1 (in dBm) – PowerC2 (in dBm)
Eb/No
Ratio of Energy per bit (Eb) to Noise density (No) (unit in dB):
•
Eb/No = C/No – 10log(DR) [where DR is the Data Rate]
•
Eb/No = Es/No – 10log(SE) [where SE is Spectral Efficiency]
Es/No
Ratio of Energy per symbol (Es) to Noise density (No) (unit in dB):
•
Es/No = C/No – 10log(SR) [where SR is the Symbol Rate]
•
Es/No = Eb/No + 10log(SE) [where SE is Spectral Efficiency]
C/N
Ratio of Carrier Power (C) to Noise (N) (unit in dB):
Equivalent to Es/No when calculated in the Symbol Rate bandwidth.
C/No
Ratio of Carrier Power (C) to Noise Density (No) (unit in dBHz)
10–30
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
Co+No/No
Ratio of Carrier Density (Co) + Noise (No) to Noise Density (No) (unit in dB):
C/N = C/No – 10log(B) [where B is bandwidth in Hz]
Eb/No = C/No – 10log(DR) [where DR is data rate in bits/sec]
= C/N + 10log(B) – 10log(DR)
= C/N – 10log(SE) [where SE is Spectral Efficiency]
Eb/No = 10log (10
((Co+No/No)/10)
– 1) – 10log(SE) [where SE is Spectral Efficiency]
[Note: Spectral Efficiency is in bps / Hz]
Power Spectral Density (PSD)
Power Spectral Density (PSD) is the signal power per unit bandwidth: dBW / Hz or dBm / Hz
For example:
Signal power = 20 dBm
Signal bandwidth = 5 MHz
PSD = 20 – 10 *log (5,000,000) = -46.99 dBm / Hz
PSD Ratio
Ratio of Power Spectral Density (PSD) of the interfering carrier to the desired carrier.
If looking at the two carriers side-by-side on a spectrum
analyzer:
Quasi Error Free (QEF)
Quasi Error Free (QEF) corresponds to PER ~10
-7
[Note: PER (packet error rate) is based upon a 188-byte MPEG frame size]
Spectral Efficiency (SE)
Ratio of the Data Rate to the Symbol Rate.
Symbol Rate & Data Rate
Symbol Rate and Data Rate are related:
•
DR = SR * SE [Data Rate = Symbol Rate * Spectral Efficiency]
•
SR = DR / SE [Symbol Rate = Data Rate / Spectral Efficiency]
10–31
CDM-625 Advanced Satellite Modem
DoubleTalk Carrier-in-Carrier Option
Revision 15
MN-CDM625
Notes:
10–32
Chapter 11. EDMAC CHANNEL
11.1 Overview
11.1.1
EDMAC
EDMAC is an acronym for Embedded Distant-end Monitor And Control. This feature permits
user access to the M&C features of modems that are at the distant-end of a satellite link. This is
accomplished by adding extra information to your data, but in a manner that is otherwise
transparent.
On the transmit side:
The data is split into frames – each frame containing 1008 bits (except Rate 21/44 BPSK Turbo,
or when the data rates exceed 2048 kbps, where the frame length is 2928 bits, and Rate 5/16
BPSK Turbo where the frame length is 3072 bits). 48 bits in each frame are overhead, and the
rest of these bits are user data. This increases the rate of transmission by 5% (approximately
1.5% for the Turbo BPSK cases, and for all data rates greater than 2.048 Mbps). For example, if
the user data rate is 64 kbps, the actual transmission rate will now be at 67.2 kbps. Note that
you may also select EDMAC-2 framing, which always uses a 2928 bit frame, and yields a 1.6%
overhead for all modulation types and data rates.
At the start of each frame, a 12-bit synchronization word is added. This allows the demodulator
to find and lock to the start of frame. At regular intervals throughout the frame, additional data
bytes and flag bits are added (a further 36 bits in total). It is these additional bytes that convey
the M&C data.
When framing is used, the normal V.35 scrambler is no longer used. This V.35 approach is called
‘self synchronizing’ because no external information is required in the receiver in order for the
de-scrambling process to recover the original data.
The disadvantage of this method is that it multiplies errors. On average, if one bit error is
present at the input of the descrambler, three output errors are generated. However, there is an
alternative when the data is in a framed format: in this case, a different class of scrambler may
be used – one that uses the start of frame information to start the scrambling process at an
exact known state.
In the receiver, having synchronized to the frame, the de-scrambler can begin its processing at
exactly the right time. This method does not multiply errors, and therefore has a clear
11–1
CDM-625 Advanced Satellite Modem
EDMAC Channel
Revision 15
MN-CDM625
advantage over V.35 scrambling. This is fortunate, as there is a penalty to be paid for adding the
framing: by adding the extra 5% to the transmitted data rate, the effective Eb/No that is seen
will degrade by a factor of 10log(1.05), or 0.21 dB (0.07dB in the case of the two BPSK Turbo
rates or EDMAC-2).
The use of an externally synchronized scrambler and descrambler almost exactly compensates
for this degradation. The net effect is that you will see effectively identical BER performance,
whether or not framing is used.
On the receive side:
When the demodulator locks to the incoming carrier, it must go through the additional step of
searching for and locking to the synchronization word. This uniquely identifies the start of
frame, and permits the extraction of the overhead bytes and flag bits at the correct position
within the frame. Additionally, the start of frame permits the de-scrambler to correctly recover
the data: your data is extracted and sent through additional processing in the normal manner.
The extracted overhead bytes are examined to determine if they contain valid M&C bytes.
11.1.2
Drop & Insert ++
A new variation of EDMAC is available with D&I++ framing. With this, each frame contains 2944
bits, with 64 overhead bits and 2880 user data bits. The portion of the overhead used for the
EDMAC link performs identically to that of the EDMAC frame, but because D&I++ uses a smaller
overhead, the two modes are not compatible with each other.
11.1.3
EDMAC-3
EDMAC-3 is another variation of EDMAC, which uses the same rate exchange as the original
EDMAC frame:
•
21/20 (5%) at 2048 kbps and below
•
61/60 (1.6%) above 2048 kbps
With EDMAC-3, however, the EDMAC channel operates at 1/3 the rate of original EDMAC
because most of the overhead is dedicated to carrying the remote modem’s complete status
information (including AUPC), so that it is available to the near-end modem at nearly real-time
speed. EDMAC-3 is best suited for SNMP proxy applications.
11–2
CDM-625 Advanced Satellite Modem
EDMAC Channel
Revision 15
MN-CDM625
11.2 EDMAC Channel M&C Connection
Data to be transmitted to the distant-end is sent to a local unit via the remote control port. A
message for the distant-end is indistinguishable from a ‘local’ message – it has the same
structure and content, only the address will identify it as being for a distant-end unit.
Before the M&C data can be successfully transmitted and received, pairs of units must be split
into EDMAC Masters and EDMAC Slaves. Masters are local to the M&C Computer, and Slaves are
distant-end.
Now, a unit that has been designated an EDMAC master not only responds to its own unique
bus address, but it will also be configured to listen for the address that corresponds to its
EDMAC Slave. When a complete message packet has been received by the EDMAC Master, it will
begin to transmit this packet over the satellite channel, using the overhead bytes that become
available.
The ‘normal’ protocol for the message packet is not used over the satellite path, as it
is subject to errors. For this reason, a much more robust protocol is used which
incorporates extensive error checking.
At the distant-end, the EDMAC slave, configured for the correct address, receives these bytes,
and when a complete packet has been received, it will take the action requested, and then send
the appropriate response to the EDMAC Master, using the return overhead path on the satellite
link. The EDMAC Master assembles the complete packet, and transmits the response back to the
M&C Computer.
Apart from the round-trip satellite delay, the M&C Computer does not see any difference
between local and distant-end units – it sends out a packet, addressed to a particular unit, and
gets back a response. It can be seen that the EDMAC Master simply acts as forwarding service, in
a manner that is completely transparent.
This approach does not require any additional cabling; connection is made using the normal
M&C remote port. Furthermore, you do not have to worry about configuring the baud rate of
the M&C connection to match the lowest data rate modem in the system. The M&C system can
have mixed data-rate modems, from 18 kbps to 25 Mbps, and still run at speeds in excess of
19200 baud. It should be pointed out that, at 18 kbps, the effective throughput of the overhead
channel is only 56 asynchronous characters/second. For a message of 24 bytes, the time
between sending a poll request and receiving a response will be around 1 second. (Note that
when EDMAC-2 or either of the BPSK Turbo rates is in use, the overhead rate is reduced by a
factor of three, and therefore the response time will be around 3 seconds.)
11–3
CDM-625 Advanced Satellite Modem
EDMAC Channel
Revision 15
MN-CDM625
11.3 EDMAC Channel Setup
To access a distant-end unit:
•
Designate a Master/Slave pair: Master at the local-end, Slave at the distant-end.
•
On the local-end unit, enable framing and EDMAC, define the unit as MASTER, then enter
the bus address. This is constrained to be ‘base 10' meaning that only addresses such as 10,
20, 30, 40 etc, are allowed.
•
Choose a unique bus address for the distant-end. This should normally be set to the ‘base
10' address + 1. For example, if the MASTER unit is set to 30, choose 31 for the distant-end
unit.
•
On the distant-end unit, enable framing and EDMAC, define the unit as SLAVE, then enter
the bus address. The orange EDMAC Mode LED on the modem front panel should be
illuminated.
•
Set the local-end unit to RS485 remote control, and set the bus address of this local unit.
The orange Remote Mode LED on the modem front panel should be illuminated.
•
Once the satellite link has been established, connect the M&C Computer, and begin
communications with both the local and distant end units.
EDMAC modes are fully compatible with AUPC modes.
11–4
Chapter 12. ESC++
12.1 Overview
ESC is an acronym for Engineering Service Channel. The ESC++ mode of operation is a closed
network frame structure that combines Automatic Uplink Power Control (AUPC) with a high
speed asynchronous order-wire channel. AUPC works identically to what is offered with EDMAC
and D&I++ framing, but is not compatible with either because ESC++ framing uses a different
overhead percentage than the other closed network framing modes.
12.2 Overhead Details
Baud rates from 1200 to 38400 bits/sec are offered using EIA-232 or EIA-485 format. Three data
formats are available: 8-N-1 (eight data bits, no parity, and one stop bit), 7-E-2 (seven data bits,
even parity, and two stop bits), and 7-O-2 (seven data bits, odd parity, and two stop bits). The
9-pin ESC port is used for this data channel (see Sect. 3.2.2.5 ESC (DB-9F) in Chapter 3. REAR
PANEL CONNECTORS AND PINOUTS for more information).
Because 38400 baud is the maximum rate available, the actual overhead percentage for ESC++
framing changes as the data rate increases, thereby saving bandwidth at high data rates. The
added overhead is as follows:
Data rate
Overhead ratio (percentage)
64 kbps to < 768 kbps
19/17 (11.76%)
768 kbps to 1.5 Mbps
12/11 (9.09%)
> 1.5 Mbps to 2.5 Mbps
29/27 (7.4%)
> 2.5 Mbps to 7 Mbps
19/18 (5.56%)
> 7 Mbps
64/63 (1.58%)
Note that 64 kbps is the minimum data rate allowable with ESC++. Depending upon code rate
and modulation used, the modem’s maximum data rate of 25 Mbps may be used with ESC++. In
all cases, if the Reed-Solomon outer codec is used, the 126/112 ratio is employed with ESC++.
The new frame structure may be used with any FEC codec type available with the CDM-625.
12–1
CDM-625 Advanced Satellite Modem
ESC++
Revision 15
MN-CDM625
12.3 Available Baud Rates
At the lowest data rates, the 11.76% overhead may not allow all baud rates. Available rates
are as follows:
Data rate
Baud rates available
64 to 127.999 kbps
1200, 2400, 4800
128 to 191.999 kbps
1200 to 9600
192 to 255.999 kbps
1200 to 14400
256 to 383.999 kbps
1200 to 19200
384 to 511.999 kbps
1200 to 28800
512 kbps and above
1200 to 38400
12.4 Configuration
Chapter 5. FRONT PANEL OPERATION
Use the SELECT: Configure  Mode menu to select ESC++. Then, use the SELECT: Configure 
Misc  HiRateESC menu select the baud rate and asynchronous character format.
12.5 Effect on Eb/No Performance
Because the increase in transmitted data rate will cause a decrease in the Eb/No performance –
particularly at lower data rates where the percentage overhead is large – all of the published
data concerning BER versus Eb/No needs to be modified according to the table that follows:
Data rate
Overhead ratio (percentage)
Eb/No degradation
64 kbps to < 768 kbps
19/17 (11.76%)
0.48 dB
768 kbps to 1.5 Mbps
12/11 (9.09%)
0.38 dB
> 1.5 Mbps to 2.5 Mbps
29/27 (7.4%)
0.31 dB
> 2.5 Mbps to 7 Mbps
19/18 (5.56%)
0.23 dB
> 7 Mbps
64/63 (1.58%)
0.07 dB
The degradation is simply 10 x log (Overhead ratio).
The Eb/No displayed by the modem (SELECT: Monitor RX-Params) takes this into account in
the value that is calculated.
12–2
Chapter 13. OFFSET QPSK
OPERATION
OQPSK is an acronym for Offset Quadrature Phase Shift Keying modulation. OQPSK is a variation
of normal QPSK that is offered in the CDM-625 Advanced Satellite Modem. Normal band limited
QPSK produces an RF signal envelope that necessarily goes through a point of zero amplitude
when the modulator transitions through non-adjacent phase states. This is not considered to be
a problem in most communication systems, as long as the entire signal processing chain is
linear.
However, when band-limited QPSK is passed through a non-linearity (e.g., a saturated power
amplifier), there is a tendency for the carefully filtered spectrum to degrade. This phenomenon
is termed spectral regrowth, and at the extreme (hard limiting), the original unfiltered sin(x)/x
spectrum would result. In most systems, this would cause an unacceptable level of interference
to adjacent carriers, and would cause degradation of the BER performance of the corresponding
demodulator.
To overcome the problem of the envelope collapsing to a point of zero amplitude, Offset QPSK
places a delay between I and Q channels of exactly 1/2 symbol. Now, the modulator cannot
transition through zero when faced with non-adjacent phase states; the result is that there is far
less variation in the envelope of the signal, and non-linearities do not cause the same level of
degradation.
The demodulator must realign the I and Q symbol streams before the process of carrier recovery
can take place. For various reasons, this makes the process of acquisition more difficult. In the
CDM-625, the two consequences of this are as follows:
1. Demodulator acquisition may be longer than standard QPSK, especially at low symbol rates.
2. The acquisition threshold is slightly higher than for normal QPSK. This effect is only an issue
for LDPC Rate 1/2 and TPC Rate 21/44 code rates, where the Eb/No values are typically less
than 2 dB. In this case, the acquisition and tracking threshold is approximately 1dB higher
than for QPSK.
13–1
CDM-625 Advanced Satellite Modem
Offset QPSK Operation
Revision 15
MN-CDM625
Notes:
13–2
Chapter 14. OPEN NETWORK
OPERATIONS
14.1 Overview
This chapter summarizes the functionality and specifications of the Intelsat Business Service
(IBS), Drop and Insert (D&I), and Intermediate Data Rate (IDR) Open Network framing modes.
14.2 Intelsat Business Service (IBS)
Primary Data Rates Supported
G.703
1544, 2048, 6312 and 8448 kbps SD, RD
EIA-422, V.35, LVDS
N x 64 kbps SD, RD (up to 8448 kbps)
ADPCM Audio (2 Channels)
64 kbps only, full duplex
Engineering Service Channel
Earth Station-to-Earth
Station Channel
EIA-232 data synchronous at 1/480 of the primary data
EIA-232 data asynchronous at 1/2000 of the primary data
High Rate Engineering Service Channel
ESC Data Interface Type
Async – configurable asynchronous character format, EIA-232 at up to
1/20th of primary data rate
ESC Data Rate
Example: 2400 baud at 64 kbps
Faults and Alarms
Satellite Backward Alarm
1 (per IESS-309)
Receive BWA Output
Enabled onto terrestrial secondary alarm
14–1
CDM-625 Advanced Satellite Modem
Open Network Operations
14.2.1
Revision 15
MN-CDM625
IBS Clock/Data Recovery and De-jitter
This feature performs clock and data recovery on the G.703 format. Clock de-jitter and data
encoding/decoding is done as with the IDR configuration.
14.2.2
IBS Framing
IBS Framing multiplexes/demultiplexes the primary data in compliance with the standard IESS309 overhead ratio of 1/15 (4 overhead bytes per 60 data bytes) and provides the rate
exchanged transmit clock to the modulator portion of the base modem.
14.2.3
IBS Engineering Service Channel
The IBS Engineering Service Channel provides bi-directional processing of the components of the
ESC channel, including the ASYNC or SYNC EIA-232 data channel, and fault/alarm indications.
Alternately, a high-rate ESC channel – at up to 1/20th of the primary data rate – is available,
using Async EIA-232 format.
14.2.4
IBS Scrambling
IBS Scrambling provides the synchronous scrambling/descrambling of the satellite-framed data
specified in IESS-309. Base modem scrambling/descrambling is disabled in this mode.
14–2
CDM-625 Advanced Satellite Modem
Open Network Operations
Revision 15
MN-CDM625
14.3 Drop and Insert (D&I)
Primary Data Rates Supported
G.703, EIA-422, V.35 and Serial
LVDS
1544 kbps SD, RD, DDO, IDI
2048 kbps SD, RD, DDO, IDI
Satellite Data Rates Supported
(all have 16/15 overhead)
N x 64 kbps
N = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, or 24 (T1)
N = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, or 30 (E1-CCS)
N = 1, 2, 4, 6, 8, 12, 16, 24, 30 (E1-CAS)
Terrestrial Framing Supported
G.732/G.733, G.704
Satellite Overhead Rate
16/15 of data rate per IESS-308 Rev. 6 and IESS-309 Rev. 3, or
higher
Timeslot Selection Range
1 to 24 (all T1 modes)
1 to 30 (E1-CAS and E1-CCS)
Arbitrary order, non-contiguous available
Plesiochronous Buffer Sizes
Selectable size of 64 to 262,144 bits, in 16-bit steps (with added
limitations for G.704 frame boundaries)
Buffer Clock Reference
Derived from Insert Data In (Insert Clock)
External, RX (satellite) or TX (Terrestrial)
Asynchronous Engineering Service Channel
ESC Data Interface Type
EIA-232, Asynchronous
ESC Data Rate
1/2000 of primary data rate
ESC Data Circuits Supported
SD, RD, DSR
Synchronous Engineering Service Channel
ESC Data Interface Type
EIA-232, synchronous to primary data
ESC Data Rate
1/480 of primary data rate
ESC Data Circuits Supported
SD, ST, RD, RT, DSR
Faults and Alarms
Satellite Backward Alarm
1 (per IESS-309)
Receive BWA Output
Enabled onto terrestrial secondary alarm
14–3
CDM-625 Advanced Satellite Modem
Open Network Operations
14.3.1
Revision 15
MN-CDM625
D&I Primary Data Interfaces
When configured for D&I operation, multiplexing/demultiplexing follows the IBS satellite frame
structure and ESC features, but with the following changes:
•
It accepts and outputs primary data through the G.703 connectors.
•
The data rate must be at T1 or E1 rates only. This includes additional links for Drop Data Out
and Insert Data In.
•
Clock recovery, dejitter, and encoding/decoding are performed as before.
14.3.2
D&I Framing
The IBS satellite framing/deframing is applied only to selected time slots of the data’s G.704
terrestrial structure.
14–4
CDM-625 Advanced Satellite Modem
Open Network Operations
Revision 15
MN-CDM625
14.4 Intermediate Data Rate (IDR)
Primary Data Rates Supported
G.703
EIA-422 (Replaces 8K Overhead)
V.35 (Replaces 8K Overhead)
1544 kbps SD, RD
2048 kbps SD, RD
6312 kbps SD, RD
8448 kbps SD, RD
Engineering Service Channel
ESC Audio
2 duplex ADPCM channels
Audio Encoding
CCITT G.721
Audio Interface Type
600Ω transformer-balanced 4-wire
Audio Input Level
Nominal Input : 0dBm0 (-3dBm, 600Ω)
Adjustment range: -6 to +8 dB, 2 dB steps
Audio Output Level
Adjustment range: -6 to +8 dB, 2 dB steps
Audio Filtering
Internal 300 to 3400 Hz input and output
ESC Data Interface Type
EIA-422
ESC Data Rate
8 kbps, also 64 kbps if ADPCM audio is not used
ESC Data Circuits Supported
SD, ST, RD, RT, Octet in, Octet out
Data Signal Phasing
Per EIA-449, data changes on the rising clock transition, is
sampled on the falling clock edge
Octet Timing
Octet high with every 8th bit, aligns with frame bit d8
Faults and Alarms
Backward Alarms Supported
4 input, 4 output
Backward Alarm Inputs
1 kΩ pull up to ground, set high to activate.
Backward Alarm Outputs
Form C Relay, N/O, N/C, Com
14–5
CDM-625 Advanced Satellite Modem
Open Network Operations
14.4.1
Revision 15
MN-CDM625
IDR Primary Data Interfaces
When configured for IDR operation, the board performs these functions:
•
It receives and performs clock and data recovery on incoming G.703 T1 and E1 pseudoternary data.
•
Clock dejitter is performed per G.823 and G.824, and any data decoding (AMI, B8Z5, or
HDB3) required per G.703 is also accomplished.
•
It performs IDR Framing.
•
It multiplexes in compliance with the standard IESS-308 96 kbps ESC overhead onto the data
and provides both the data and rate-exchanged clock to the modulator portion of the base
modem.
•
It performs the corresponding demultiplexing of Rx satellite data received from the
demodulator portion of the modem. Resulting G.703 data is optionally encoded (AMI, B8ZS,
or HDB3) before being output.
14.4.2
IDR Engineering Service Channel
•
It provides for bidirectional processing of the components of the ESC channel, including the
ADPCM audio channels, 8 kbps data channel, and fault indications specified by IESS-403 and
IESS-308.
•
It provides the option of using the ADPCM portion of the satellite overhead for a single 64
kbps ESC data channel in addition to (and with the same format as) the 8 kbps data channel.
•
When using G.703 format for the primary IDR data path, the P3B primary data interface (25pin) is used for the 8kbps overhead channel. If EIA-422 or V.35 is used, P3B becomes the
primary interface and the 8kbps channel is unavailable.
14–6
Chapter 15. IP SUB-MUX
15.1 Overview
Subsystem Multiplex – referred to throughout this manual as Sub-Mux – is a secondary
framing structure that combines IP traffic with any currently available combination of framing
and interface type (excluding IP itself). The composite data rate to the modulator and from
the demodulator is referenced to the primary, non-IP interface rate by a specific ratio selected
by the user.
15.2 Available Ratios
The IP portion of the modem traffic can be either smaller or larger than the primary interface by
the following ratios:
Ratio
IP Portion of Modem Traffic
1/59
IP traffic is one-fifty-ninth the primary
1/39
IP traffic is one-thirty-ninth the primary
1/19
IP traffic is one-nineteenth the primary
1/9 or 9
IP traffic is one-ninth the primary, or 9 times the primary
1/8 or 8
IP traffic is one-eighth the primary, or 8 times the primary
1/7 or 7
IP traffic is one-seventh the primary, or 7 times the primary
1/6 or 6
IP traffic is one-sixth the primary, or 6 times the primary
1/5 or 5
IP traffic is one-fifth the primary, or 5 times the primary
1/4 or 4
IP traffic is one-fourth the primary, or 4 times the primary
2/7 or 7/2
1/3 or 3
IP traffic is two-sevenths the primary, or 3.5 times the primary
IP traffic is one-third the primary, or 3 times the primary
2/5 or 5/2
IP traffic is two-fifths the primary, or 2.5 times the primary
3/7 or 7/3
IP traffic is three-sevenths the primary, or 2.33 times the primary
1/2 or 2
IP traffic is one-half the primary, or 2 times the primary
3/5 or 5/3
IP traffic is three-fifths the primary, or 1.66 times the primary
2/3 or 3/2
IP traffic is two-thirds the primary, or 1.5 times the primary
3/4 or 4/3
IP traffic is three-fourths the primary, or 1.33 times the primary
4/5 or 5/4
IP traffic is four-fifths the primary, or 1.25 times the primary
1/1
IP traffic equals the primary
15–1
CDM-625 Advanced Satellite Modem
IP Sub-Mux
Revision 15
MN-CDM625
This gives you 34 ratios from which to choose. If framing is on, the overhead associated with the
selected frame structure is applied to the primary data only, and the IP ratios above are
fractions of the framed primary data.
IP ratios that put the composite rate above the maximum data rate of the modem cannot be
selected. For example if the primary rate is 8192.000 kbps and the maximum rate of the modem
was 25000.000 kbps, then a ratio above “2” cannot be selected. Also, if Sub-Mux is on and the
primary rate is raised so the composite rate goes above the maximum of the modem, then the
IP ratio will be lowered so that the composite rate stays below the maximum.
15.3 Data Rate vs. Composite Rate
Without Sub-Mux, the CONFIG: Tx and CONFIG: Rx front panel menu screens display the
modem’s transmit and receive data rates, which refer to the terrestrial rate of the primary
interface type. Additions to the primary data due to framing are not shown, but are reflected in
the displayed symbol rates.
Once Sub-Mux is enabled, the data rate display is replaced with the composite rate. This is the
sum of the primary interface’s data rate – which now includes framing overhead – and the IP
rate at the selected ratio. The later is displayed by itself as IP INFO Rate under the CONFIG: Tx 
Tx Data Rate or CONFIG: Rx  Rx Data Rate submenu. Note that Reed-Solomon overhead, if
enabled, is also included in the composite rate calculation.
(See Sect. 5.2.1.3 CONFIG: Tx or Sect. 5.2.1.4 CONFIG: Rx and their respective subsections in
Chapter 5. FRONT PANEL OPERATION for detailed information).
Example: For a G.703 E1 primary interface, with a 4/5 Sub-Mux ratio selected:
Unframed
Primary data rate = 2048.000 kbps
IP info rate = 2048 x 4/5 = 1638.400 kbps
Composite rate = 2048 + 1638.4 or 2048 x 9/5 = 3686.400 kbps
Add ESC++ framing (added to El path only)
Data rate with overhead = 2048 x 29/27 = 2199.703 kbps
IP info rate = 2199.703 x 4/5 = 1759.762 kbps
Composite rate = 2199.703 + 1759.762 or 2199.703 x 9/5 = 3959.466 kbps
Add Reed-Solomon FEC (added after Sub-Mux)
Composite rate = 3959.466 x 126/112 = 4454.400 kbps
The Sub-Mux frame does contain a very small overhead required for acquisition and
identification of primary vs. IP data: As this overhead is taken from the "IP info rate" rather
than the primary data rate, actual IP throughput will be slightly reduced.
15–2
Chapter 16. ETHERNET
NETWORK CONFIGURATION
16.1 Overview
The CDM-625 Advanced Satellite Modem’s handling of Ethernet terrestrial traffic data differs
depending on whether the optional IP Packet Processor is either not installed or installed but
disabled; or when the optional IP Packet Processor is installed and enabled.
Chapter 18. IP PACKET PROCESSOR OPTION
This chapter explains the CDM-625’s Ethernet interface and illustrates the functional differences
between the available operating modes. Additional modes of operation are also explained.
16.2 CDM-625 Ethernet Overview
16.2.1
Interface Architecture
Figure 16-1. CDM-625 Ethernet Architecture Design
Figure 16-1 shows the internal Ethernet architecture for the CDM-625. The CDM-625 features
four built-in 10/100 BaseT Ethernet Ports (port configuration and statistics are available on a
per-port basis) connected to a single internal Ethernet Layer 2 Managed Switch.
16–1
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
16.2.2
Revision 15
MN-CDM625
Modes of Ethernet Operation
The Ethernet interface is configurable for Managed Switch Mode when the optional IP Packet
Processor is either not installed or installed but disabled; or in Router Mode or Managed
Switch Mode when the optional IP Packet Processor is installed and enabled.
This interface design allows for multiple customer Ethernet interfaces, as well as the
convenience of daisy-chaining together of multiple CDM-625s.
Additionally, because the M&C processor is connected to the internal Ethernet Switch, M&C
traffic is available via all LAN interfaces as well as via the over-the-air WAN interface.
16.2.3
Ethernet Networking Loops
It should be noted that care must be taken to avoid Ethernet Networking Loops. Specifically,
the network operator must make sure to avoid connecting multiple ports of the CDM-625 to the
same external Ethernet switch, as shown in Figure 16-2.
Figure 16-3 shows a simplified version of this loop. As shown here, two switches have been
connected – each switch has two or more separate connections. This is not how the CDM-625’s
Ethernet switches are designed to be used, and this configuration will cause a network outage.
Figure 16-2. Improper Use of External Ethernet Switch with CDM-625
Figure 16-3. Ethernet Networking Loop Example (Simplified)
16–2
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
Revision 15
MN-CDM625
16.2.3.1 Networking Loops in Managed Switch Mode
16.2.3.1.1
Hub-to-Hub using Ethernet Switches
When connecting two or more “hub-sites” where there are multi-paths between each site, care
must be taken to ensure that no Ethernet Networking Loops occur. Figure 16-4 shows two hubsites connected with two or more modems, where all the traffic being transmitted and received
is on the same LAN/VLAN. Since there is no router in the network and all the traffic is destined
to the same network, an Ethernet Networking Loop has been created.
Figure 16-4. Networking Loop Example
16–3
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
16.2.3.1.2
Revision 15
MN-CDM625
Hub-to-Hub using Ethernet Routers
Figure 16-5 shows two hub-sites connected with standard Ethernet traffic, using routers instead
of switches for the Ethernet connection. The routers will block the broadcasts coming from the
remote network; therefore, the creation of a broadcast storm is prevented and there is no
possibility of having a remote MAC on the Hub networks.
Figure 16-5. Hub-to-Hub with Standard Traffic using Routers
16–4
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
16.2.3.1.3
Revision 15
MN-CDM625
Hub-to-Remotes using Ethernet Switches or Routers
Figure 16-6 shows a hub-to-remotes configuration using switches or routers with standard
Ethernet traffic, the routers/switches will block broadcasts coming from the hub and remote
networks; therefore, the creation of a broadcast storm is prevented and there is no possibility of
having a remote MAC on the Hub networks.
Figure 16-6. Hub-to-Remotes with Standard Traffic using Routers or Switches
16–5
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
Revision 15
MN-CDM625
16.2.3.2 Networking Loops in Router Mode (with IP Packet Processor)
In a network where more than one CDM-625’s working mode is set to “Router Multipoint Hub”,
care must be taken in route table configuration to avoid Ethernet Networking Loops. Figure 16-7
shows Point-to-Multipoint configuration using the optional IP Packet Processor.
When a CDM-625’s working mode is configured as “Router Multipoint Hub”, the modem is
allowed to egress on the WAN interface the same packet as was originally ingressed from the
WAN interface. This is necessary to allow the Point-to-Multipoint configuration.
However, configuring more than one modem as a Router Hub across the WAN Interface, then
adding default routes on either side – or any other invalid routes – will cause the same packet to
ping-pong between these two modems until TTL times out.
Figure 16-7. Point-to-Point Configuration in “Router Multipoint Hub” Working Mode
16–6
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
Revision 15
MN-CDM625
16.3 Ethernet Network Configurations in Managed Switch Mode
16.3.1
P oint-to-Multipoint Hub-to-R emotes , S plit-path Traffic Us ing R outers
Figure 16-8 shows hub-to-remotes configuration using routers with standard and split-path
Ethernet traffic. A Static ARP Entry is needed in the switch so that routing of the Tx side of the
modems will be on the correct port of the router. For example, the Rx side of the Ethernet
connection for ‘Traffic Modem #N’ comes in the bottom port of the Router, but the Tx Ethernet
connection must be connected through the same port as ‘Traffic Modem #1’, as shown in this
figure.
Figure 16-8. Point-to-Multipoint using Routers
16–7
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
16.3.2
Revision 15
MN-CDM625
P oint-to-Multipoint Hub-to-R emotes , S plit-path Traffic Us ing
S witches
With switches used, the hub and remote are on the same subnet as shown in Figure 16-9,
meaning that broadcasts will be allowed to transverse the network. Learning Mode must be
disabled on the Hub Tx/Rx modem, because if a computer on the remote sends a broadcast out
to the Hub, the modem learns that MAC is local – when in fact it is not.
Figure 16-9. Point-to-Multipoint using Switches
16–8
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
Revision 15
MN-CDM625
16.4 Ethernet Network Configurations in Router Mode (with IP Packet
Processor)
16.4.1
Point-to-Multipoint (Router Multipoint Hub) Mode
Figure 16-10 depicts a Point-to-Multipoint (Router Multipoint Hub) setup, with the optional IP
Packet Processor installed and enabled in the CDM-625 and configured for Router Mode. This
configuration features a Hub Outbound CDM-625, with a rack of Hub Demods (Rx-only
CDM-625s are connected on single LAN networks), and Remotes (each) connected to a separate
LAN network).
Figure 16-10. Point-to-Multipoint (Router Multipoint Hub Mode)
16.4.1.1 Router Multipoint Hub Configuration
To configure a Router Multipoint Hub Network:
•
For the “Hub Outbound” Modem Configuration:
o
Referring to Sect. 6.5.4.3.2.1 Configuration | LAN | IP in Chapter 6. ETHERNETBASED PRODUCT MANAGEMENT: From the page’s Network Configuration
section, use the Working Mode drop-down menu to select the mode as Router
Multipoint Hub, and then click [Submit] to accept this configuration change.
o
Referring to Sect. 6.5.4.3.3.1 Configuration | Routing | Routes in Chapter 6.
ETHERNET-BASED PRODUCT MANAGEMENT: From the page’s Add New Route
16–9
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
Revision 15
MN-CDM625
section, add a route entry for each remote subset. Make sure to select toWAN
from the Interf. drop-down menu (this defines the route as LAN  WAN).
Click [Add Entry] once each route is created.
•
For the “Hub Demod” Modem Configurations:
o
Referring to Sect. 6.5.4.3.2.1 Configuration | LAN | IP in Chapter 6. ETHERNETBASED PRODUCT MANAGEMENT: From the page’s Network Configuration
section, use the Working Mode drop-down menu to select the mode as Router
Multipoint Hub, and then click [Submit] to accept this configuration change.
o
Referring to Sect. 6.5.4.3.3.1 Configuration | Routing | Routes in Chapter 6.
ETHERNET-BASED PRODUCT MANAGEMENT: From the page’s Add New Route
section, add a route for each remote subset. First, make sure to select toLAN
from the Interf. drop-down menu (this defines the route as WAN  LAN); then,
when assigning the Next Hop IP address, make sure it is identical to the Hub
Outbound modem’s IP address.
Click [Add Entry] once each route is created.
•
For the “Remote" Modem Configurations:
o
Referring to Sect. 6.5.4.3.2.1 Configuration | LAN | IP in Chapter 6. ETHERNETBASED PRODUCT MANAGEMENT: From the Network Configuration section, use
the Working Mode drop-down menu to select the mode as Router Multipoint
Remote, and then click [Submit] to accept this configuration change.
o
Referring to Sect. 6.5.4.3.3.1 Configuration | Routing | Routes in Chapter 6.
ETHERNET-BASED PRODUCT MANAGEMENT: Add a default LAN route entry
using the page’s Add New Route section. First, specify the Hub Outbound
modem’s IP address as the gateway address, and then select toWAN from the
Interf. drop-down menu (this defines the route as LAN  WAN).
Click [Add Entry] once the route is created.
16–10
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
16.4.2
Revision 15
MN-CDM625
Multicast Routing Mode
Multicast Routing Mode, available when the optional IP Packet Processor is installed and
enabled, is where communications is established via one single source (referred to as the
Multicast Sender) and routed to many groups of destination nodes (referred to as Multicast
Receivers). Typical multicast applications include multimedia conferencing, online training,
news, etc. Figure 16-11 depicts the schematic for a Multicast Routing Network.
Figure 16-11. Multicast Routing Diagram
As shown, there are two key components to this configuration – the LAN Downstream
Interface, and the WAN Upstream Interface. Observe the following:
•
LAN Downstream Interface – the LAN Downstream Interface is the interface to which
multicast packets arriving at the upstream interface are forwarded if a multicast group
has at least one listener.
The CDM-625 LAN interfaces are configured as Downstream Interface and
the IGMP server is enabled by default.
•
WAN Upstream Interface – the WAN Upstream Interface is where all multicast packets
are forwarded to the uplink interface if the multicast routing exists in the Routing table.
The CDM-625 WAN interface is configured as Upstream Interface by
default.
16–11
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
Revision 15
MN-CDM625
16.4.2.1 Multicast Routing Configuration
Figure 16-12. Configuration Example for a Multicast Routing Network
To configure a Multicast Routing Network (Figure 16-12):
•
For “Hub Outbound” Modem Configuration – Referring to Sect. 6.5.4.3.3.1
Configuration | Routing | Routes in Chapter 6. ETHERNET-BASED PRODUCT
MANAGEMENT: Add a multicast route (using the page’s Add New Route section),
making sure to select toWAN from the Interf. drop-down menu (this defines the route
as LAN  WAN). Click [Add Entry] once the route is created.
•
For “Remote” Modem Configuration – Referring to Section 6.5.4.3.3.2 Configuration |
Routing | IGMP in Chapter 6. ETHERNET-BASED PRODUCT MANAGEMENT: From the
page’s IGMP Multicast Router section, edit the IGMP parameters to suit the multicast
receivers’ capabilities (i.e., version number and query intervals).
16–12
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
Revision 15
MN-CDM625
16.5 Ethernet Overhead over WAN Interface
16.5.1
Managed Switch Mode (without IP Packet Processor)
When the optional IP Packet Processor is either not installed or installed but disabled: After
Ethernet packets are sent from the internal switch to the modem WAN interface, the link
overhead per packet is as follows:
1 Byte (HDLC Start Flag) + 2 Bytes HDLC Control + 14 Bytes
Ethernet Header + Ethernet Payload + 2 Bytes HDLC CRC
Additionally, on average, an additional 3% of overhead is added to account for HDLC bit stuffing.
16.5.2
Router Mode or Managed Switch Mode (with IP Packet Processor)
When the optional IP Packet Processor is installed and enabled: The CDM-625 uses Comtech EF
Data’s patented Streamline Encapsulation (SLE) Framing instead of HDLC Framing.
Note that in SLE Framing, no bit stuffing overhead is involved; hence, WAN overhead is
deterministic. After Ethernet packets are sent from the internal switch to the IP Packet
Processor interface, per packet overhead on the WAN Interface is as follows:
1 Byte SLE start Flags + Control Byte(s)+ Ethernet Payload
(IP + UDP + payload; IP + TCP + payload; etc.) + 2 bytes
CRC
For Control Byte(s)note the following:
•
If payload compression or header compression or both are enabled, Control
Byte(s)= 2 bytes;
•
If Segmentation and Reassembly (SAR) is enabled, Control Byte(s)= 2 bytes;
•
Otherwise, Control Byte(s)= 1 byte.
16–13
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
Revision 15
MN-CDM625
16.6 Ethernet Redundancy
Once you have determined the best configuration for near-to-far end Ethernet networks, you
may add the appropriate redundancy switches to one or both ends of the link(s):
•
1:1 Redundancy is supported using either a CRS-170A L-Band 1:1 Redundancy Switch or
a CRS-180 70/140 MHz 1:1 Redundancy Switch, and a user-supplied, off-the-shelf
Ethernet switch.
•
1:N Redundancy is supported using a CRS-300 1:10 Redundancy Switch or a CRS-500
M:N Redundancy System in 1:N mode (in a wired-thru or wired-around configuration),
and is supported in Single-Port Ethernet Bridge (Managed Switch) and Router Modes
(the optional IP Packet Processor is required for Router Mode).
•
Packet Processor Redundancy is supported in both 1:1 and 1:N redundant
configurations using the CRS-500 M:N Redundancy System.
Refer to the pertinent switch Installation and Operation Manuals for detailed information on
using the CDM-625 in a redundancy configuration.
16–14
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
Revision 15
MN-CDM625
16.7 Advanced Network Timing
16.7.1
Overview
The Advanced Network Timing (ANT) feature provides IP-based protocols to synchronize the
modem's internal time-of-day clock to an external device such as a time server, Base Station
Controller (BSC), or Radio Network Controller (RNC).
16.7.2
SNTP (Simple Network Time Protocol)
The Simple Network Time Protocol (SNTP), defined in RFC-1361, provides millisecondresolution time synchronization with a time server. When the modem synchronizes its time, it also
synchronizes the time of all connected EDMAC devices, such as slave LPODs or CSATs. When all
devices are synchronized, administrators can better correlate logged events between devices.
SNTP is a UDP protocol that works on port 123. If the modem is not updating its time, verify that
there are no network devices between the modem and time server that might block UDP packets
on that port.
16.7.3
PTP (Precision Time Protocol)
1. At present, PTP is not supported in modems in which the optional IP
Packet Processor is installed and enabled.
2. For better PTP clock accuracy, ingress and egress port sync interval shall
be at least 2 seconds.
The Precision Time Protocol is used to synchronize clocks throughout a computer network.
Based on the IEEE 1588v2 (2008) standard, PTP achieves clock accuracy in the nanosecond range
– much more accurate than what is attainable by NTP (Network Time Protocol) – and it is also
used in network applications where GPS is either unaffordable or inaccessible.
Comtech EF Data’s implementation of PTP in the CDM-625 operates over IP, without the
presence of the optional IP Packet Processor. To achieve high accuracy time and frequency
synchronization, PTP relies on hardware time stamping at the ingress and egress ports of the
network; therefore, all devices in the network must support PTP.
Figure 16-13 shows a typical network configuration. Here, the RNC/BSC (Radio Network
Controller/Base Station Controller) at the near-end side of the network and the BTS (Base
Transceiver Station) on the distant-end side of the network are the IEEE 1588v2-capable devices.
In this topology the RNC/BSC serves as the Grandmaster – the root timing reference that
transmits synchronization information to the clocks residing on its network segment – or slave
to the Grandmaster.
16–15
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
Revision 15
MN-CDM625
Figure 16-13. Configuration Example – Point-to-Point Network with PTP
Without PTP implementation and support in the modem, it is very difficult to achieve PTP endto-end (RNC ► BTS) time synchronization in nanosecond range due to the presence in the
network of variable delay components such as QoS (Quality of Service) buffer, Rx/Tx FIFOs,
Satellite Doppler, etc.
The CDM-625 bridges PTP from LAN to WAN and vice versa, and uses 2-step synchronization
(i.e., it sends both Sync and Follow-up messages when acting as a master). When negotiating
with devices over the LAN interface, the modem uses UDP multicast PTP messages on UDP Port
319 for events, and UDP Port 320 for general packets. On the WAN interface, the modem uses
UDP Port 59319 for events, and UDP Port 59320 for general packets.
Some devices use the Announce message to negotiate which is the PTP master, a process known
as the Best Master Clock (BMC) algorithm. This algorithm allows PTP devices to vote on which
device has the best clock resolution. The CDM-625 will become a PTP master if there is no
Grandmaster device or the Grandmaster is not reachable.
You must configure the modem for the Grandmaster location:
•
When the modem can reach the Grandmaster device only through its LAN interface, set
Grandmaster to LAN.
When Grandmaster is LAN, then the modem knows it must become a slave to the
Grandmaster on the LAN interface, and will set its PTP Clock Priority1 value to 255 (the
lowest).
16–16
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
•
Revision 15
MN-CDM625
When the modem must synchronize with the Grandmaster over the WAN interface, set
Grandmaster to WAN.
When Grandmaster is WAN, the modem will set its PTP Clock Priority1 value to 1 (the highest)
to force slave devices that use the BMC algorithm to accept the modem as the PTP master.
Symbol
Designation
M
Master
The Master device maintains the clocks.
S
Slave
The Slave device synchronizes its clock to the Master device’s clock.
Grandmaster
Function
The root timing reference that transmits synchronization information to the clocks
residing on its network segment.
Figure 16-14. PTP Master/Slave Assignment Example
As shown in Figure 16-14:
•
The first segment is between the RNC/BSC and the CDM-625 ‘A’ (near-end modem) LAN
port. In this segment, the RNC/BSC is the master, and the near-end modem LAN port is
the slave.
Using the CDM-625 ‘A’ front panel or its Web Server Interface, set the PTP Grandmaster
on this near-end modem as LAN.
•
The second segment is from the CDM-625 ‘A’ (near-end modem) WAN port to the
CDM-625 ‘B’ (distant-end modem) WAN port, in which the near-end modem WAN port
is the master and the distant-end modem WAN port is the slave.
Using the CDM-625 ‘B’ front panel or its Web Server Interface, set the PTP Grandmaster
on this distant-end modem as WAN.
16–17
CDM-625 Advanced Satellite Modem
Ethernet Network Configuration
Revision 15
MN-CDM625
Accordingly, the third segment between the CDM-625 ‘B’ (distant-end modem) LAN
port and the BTS defines the distant-end modem’s LAN port as the master and the BTS
as the slave.
As configured here, each modem has established independent Wireless Receiver/Transmitter
(WRT) protocol segments – one for LAN and other one for WAN. This defines the boundary clock
time distribution configuration, where the slave to one interface provides a master clock to the
other interfaces.
16–18
Chapter 17. ADAPTIVE CODING
AND MODULATION (ACM)
17.1 Overview
The VersaFEC® Adaptive Coding and Modulation (ACM) feature is a patents-pending technology,
wholly owned and developed by Comtech EF Data and CEFD sister division Comtech AHA Corp. It
serves as a significant operational enhancement for the CDM-625 Advanced Satellite Modem:
•
ACM turns fade margin into increased link capacity – gains of 100% or more are possible,
compared to traditional Constant Coding and Modulation (CCM). This is accomplished by
automatically adapting the modulation type and FEC code rate to give highest possible
throughput.
•
ACM maximizes throughput regardless of link conditions (noise or other impairments, clear
sky, rain fade, etc). Initial setup is easy, and then requires no further user intervention.
•
With a CCM system, severe rain fading can cause the total loss of the link, and zero
throughput. ACM keeps the link up (with lower throughput) – and can yield much higher
system availability.
•
ACM in the CDM-625 is used in conjunction with VersaFEC and is currently for IP traffic only.
The VersaFEC ACM feature requires Firmware Version 1.4.0 or later, the VersaFEC plug-in module,
and the appropriate FAST codes.
17–1
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
Revision 15
MN-CDM625
17.2 Background
ACM is not a new concept. It has been used for some time in wireless communications, including
terrestrial microwave applications and, more recently, over satellite links. Its primary function is to
optimize throughput in a wireless data link, by adapting the modulation order used and the
Forward Error Correction code rate – both of which directly affect spectral efficiency (expressed in
bits per second per Hertz) according to the noise conditions (or other impairments) on the link.
Implicit in this concept is that the symbol rate (and power) of the wireless communication system
must remain constant. This ensures that the bandwidth allocated for a particular link is never
exceeded.
Given that the symbol rate does not change, if modulation and coding are changed, the data
rate must therefore be modified. This is expressed in the simple equation:
Symbol rate = bit rate / (modulation order * code rate)
For example, for Rate 3/4 QPSK (where modulation order = 2):
Symbol rate = bit rate * 0.666
Re-arranging:
Bit rate = symbol rate * modulation order * code rate
So, in changing to a higher modulation order or code rate, the bit rate is increased, and in
changing to a lower modulation order or code rate, the bit rate is reduced.
However, there are a number of important factors to be considered, namely:
•
The digital communications system must be able to tolerate a change in bit rate.
Synchronous serial interfaces (such as G.703 E1, which operated at a fixed data rate of 2.048
Mbps) are totally unsuitable in a scheme where data rate is changing. The only practical
application for this scheme is a packet-based scheme that will tolerate a change in data rate,
and which has mechanisms within its protocols to recognize when increased or reduced
bandwidth is available. The best example of this is Ethernet, and this discussion is limited to
schemes that employ it.
•
The bit rate cannot be changed arbitrarily. The link noise conditions, described in terms of
Eb/No or SNR, must be able to support reliable communications for the given modulation
order and code rate. This is a key point, as in fact, the link SNR is the input that drives the
adaptation.
17–2
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
Revision 15
MN-CDM625
17.3 Requirements for ACM
A generic example of ACM-over-Satellite is shown in Figure 17-1. The essential requirements for
enabling this scheme as as follows:
•
A modulator and FEC encoder that can instantaneously, when commanded, change either
modulation type (order) or FEC encoder rate, or both. This needs to be accomplished
without the corruption of data anywhere in the path. Block FEC codes are considered to be
the most practical in achieving the required synchronization. Recently, a specific
nomenclature has emerged to describe a combination of a modulation type and code rate –
namely, ModCod (also referred to as Mod/Code). The modulator is required to send the
value of ModCod at the start of each code block to signal the demodulator/decoder how to
configure for the correct modulation type and FEC code rate.
•
A receiver that is capable of demodulating and decoding the signal transmitted by a)
without any a priori knowledge of when a change has taken place, but based purely on the
value of ModCod seen at the start of each FEC block. Again, this needs to be accomplished
without the corruption of data anywhere in the path.
•
The receiver in b) needs to derive an estimate of the link quality (in terms of Eb/No, SNR, etc)
and then communicate this estimate, via a return channel, to the modulator in a).
•
The modulator in a) needs to able to process the link quality metric from the demodulator in
b), and then, based upon a pre-determined algorithm, adapt the data rate and change the
ModCod sent to the receiver at the distant end. Thus, the data rate on the link can be
maximized, given the current link noise conditions.
17–3
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
Revision 15
MN-CDM625
Figure 17-1. ACM-over-Satellite – Generic Example
17–4
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
17.4
Revision 15
MN-CDM625
An Existing Satellite ACM Scheme
The best-known scheme for ACM-over-Satellite is covered in the DVB-S2 specification (EN 302307)
ratified by ETSI in March 2005. While primarily for digital video broadcast, the DVB-S2
specification also encompasses two-way interactive services.
A summary of the main transmission aspects follows:
•
Four modulation types are defined: QPSK, 8PSK, 16APSK and 32APSK.
•
The primary FEC type is low-density parity check coding (LDPC), concatenated with a short
BCH code.
•
The 8PSK, 16APSK, and 32APSK modulation types use interleaving.
•
There are ten code rates defined: 1/4, 1/3, 2/5, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9 and 9/10,
which depend on the modulation type and other system requirements.
•
A single FEC block may be 64800 bits (normal, referred to as 64k blocks) or 16200 bits (short,
referred to as 16k blocks)
•
Adaptive coding and modulation is defined for optimizing satellite transponder capacity.
Hughes Network Systems (Germantown, MD) have commercially deployed DVB-S2 with ACM
over satellite.
17.5 Disadvantages of DVB-S2
While the scheme defined by DVB-S2 is undoubtedly very effective for many broadcast and
higher data rate applications, it is definitely not a ‘one size fits all’ solution. Some of the
disadvantages are as follows:
•
Excessive latency. The so-called short blocks are too long for low latency IP applications at
low data rates. This is exacerbated by the addition of interleaving.
•
Overly complex in its implementation. The design of DVB-S2 dictated that all FEC blocks
should be constant in bits. This means that for each ModCod, there are a varying number of
symbols. This then makes the task of synchronization a much more demanding task. Also,
because of the limitations of tracking the higher-order modulations in a very low SNR
environment, so-called pilot symbols were added in order to aid tracking.
•
Concatenated BCH code added to mitigate the problem of error rate ‘flaring’ and
‘flooring’. This is no longer necessary. Since the introduction of the original LDPC/BCH
scheme, an enormous amount of research has been done on the design of LDPC codes.
Most importantly, however, LDPC codes can now be designed that yield almost equivalent
coding gain, but with considerably shorter block lengths.
17–5
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
•
Revision 15
MN-CDM625
In an ACM mode, no overhead channel was defined by DVB-S2 for the purpose of
reporting SNR metrics to the originating end. It has been left to individual equipment
manufacturers to decide their own method. This illustrates that all ACM systems, DVB-S2 or
not, are proprietary. In addition, it implies that additional bandwidth needs to be consumed
for the SNR reporting, and this is not accounted for in the code rate.
17.6 VersaFEC ACM
VersaFEC (a registered trademark of Comtech AHA), in concert with a novel ACM approach,
addresses all of the shortcomings of DVB-S2 outlined above. There are patents pending for both
VersaFEC and the ACM scheme.
VersaFEC covers a family of 12 short-block LDPC ModCods, specifically designed for low latency
and ACM applications. However, the VersaFEC codes are equally well suited to Constant Coding
and Modulation (CCM) applications.
The requirements for an ACM system that approaches the minimum possible latency are:
•
The shortest possible LDPC codes that give performance at or very close to DVB-S2, in order
to minimize latency, and which do not use interleaving.
•
Encoder design that further reduces latency to the minimum possible.
•
A constant number of symbols per block, to reduce the demodulator and decoder
complexity, and significantly, also reduces latency in the ACM case.
•
The elimination of the need for pilot symbols for carrier tracking at low SNR by substitution
of other modulation techniques. This further reduces the complexity of the demodulator.
•
Reduction in the number of ModCods that further reduces complexity.
•
The inclusion, at the physical layer, of an overhead channel to permit the reporting of SNR
metrics back to the originating end. Note that this does not have to be enabled or disabled –
it is part of the fundamental frame structure of VersaFEC ACM, and has been take into
account in the code rate.
The family of VersaFEC short-block LDPC codes is presented in Table 17-1. The modulation types
include BPSK, QPSK, 8-QAM, and 16-QAM. It will be seen from the table that in order to
maintain a constant number of symbols per block, the block size in bits (data + parity) must
necessarily change, depending on both the modulation type (which affects the number of bits
per symbol) and the code rate. For VersaFEC, the block size varies between 2k and 8.2k bits. At
worst, therefore, the VersaFEC codes are 50% shorter than the ‘short’ DVB-S2 codes.
17–6
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
Revision 15
MN-CDM625
Table 17-1. The VersaFEC ModCod set
Modulation
Code
Rate
BPSK
QPSK
QPSK
QPSK
QPSK
8-QAM
8-QAM
8-QAM
16-QAM
16-QAM
16-QAM
16-QAM
0.488
0.533
0.631
0.706
0.803
0.642
0.711
0.780
0.731
0.780
0.829
0.853
Spectral
Block
efficiency,
size, bits
bps/Hz
0.49
2k
1.07
4.1k
1.26
4.1k
1.41
4.1k
1.61
4.1k
1.93
6.1k
2.13
6.1k
2.34
6.1k
2.93
8.2k
3.12
8.2k
3.32
8.2k
3.41
8.2k
Typical
Eb/No, for
BER = 5 x 10-8
2.4 dB
2.2 dB
2.7 dB
3.4 dB
3.8 dB
4.6 dB
5.2 dB
5.6 dB
6.3 dB
7.0 dB
7.5 dB
8.0 dB
Latency at
64 kbps, in
milliseconds
26
53
59
62
66
89
93
97
125
129
131
132
Min.
Data Rate,
CCM mode
18 kbps
20 kbps
23 kbps
26 kbps
28 kbps
35 kbps
39 kbps
43 kbps
53 kbps
57 kbps
60 kbps
62 kbps
Max.
Data Rate,
CCM mode
5.7 Mbps
10 Mbps
10 Mbps
10 Mbps
12 Mbps
12 Mbps
12 Mbps
12 Mbps
12 Mbps
14 Mbps
14 Mbps
16 Mbps
The VersaFEC codes compared with the Shannon bound are shown below in Figure 17-2. It can be
seen that the performance of VersaFEC at or near the DVB-S2 performance with 16 kbit blocks.
Note that SNR is used in place of Eb/No, a convention for comparing ACM ModCods. SNR is
defined as Eb/No + 10log (Spectral Efficiency).
Figure 17-2. VersaFEC Codes vs. Constrained Capacity
17–7
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
17.7
Revision 15
MN-CDM625
VersaFEC ACM Latency
In an ACM system that has a number of ModCods, each having a different latency, what defines
the overall system latency? The answer is simple – the latency of the worst-case ModCod. (This
may not seem obvious to some, and it is beyond the scope of this chapter to provide a rigorous
defense of this statement. It is, however, a correct statement despite certain believers in noncausal systems and encoders that possess the magical quality of negative latency…)
Examining the data in Table 17-2, latency for each ModCod is shown for the example of
VersaFEC ACM at a fixed 100 ksymbols/second rate. Of particular note is that even though the
ModCods span a 7:1 variation in throughput, the latency is only varying between 25 and 34
milliseconds. A careful analysis will show that this is a consequence of using a constant number
of symbols per block. In the example shown the worst-case latency for this ACM scheme is 34
milliseconds, + WAN Buffer delay (which is configurable, with a minimum value of 20ms).
Table 17-2. VersaFEC Implementation of ACM – 100 ksymbols/sec Example Case
ModCod
Modulation
Code Rate
Spectral efficiency,
bps/Hz
Bit rate (throughput)
Minimum Latency,
In milliseconds,
for each ModCod
0
BPSK
0.488
0.49
49 kbps
34 + WAN BUFFER
1
QPSK
0.533
1.07
107 kbps
32 + WAN BUFFER
2
QPSK
0.631
1.26
126 kbps
30 + WAN BUFFER
3
QPSK
0.706
1.41
141 kbps
28 + WAN BUFFER
4
QPSK
0.803
1.61
161 kbps
26 + WAN BUFFER
5
8-QAM
0.642
1.93
193 kbps
30 + WAN BUFFER
6
8-QAM
0.711
2.13
213 kbps
28 + WAN BUFFER
7
8-QAM
0.780
2.34
234 kbps
27 + WAN BUFFER
8
16-QAM
0.731
2.93
293 kbps
27 + WAN BUFFER
9
16-QAM
0.780
3.12
312 kbps
26 + WAN BUFFER
10
16-QAM
0.829
3.32
332 kbps
25 + WAN BUFFER
11
16-QAM
0.853
3.41
341 kbps
25 + WAN BUFFER
OVERALL SYSTEM LATENCY = Worst-case ModCod (ModCod0)
Latency = 34 milliseconds + WAN Buffer delay
By way of comparison, consider the same 100 ksymbols/second rate, but this time using DVB-S2. It
becomes clear that there is an unintended penalty (besides demodulator complexity) to having a
constant number of bits per block. Each time the ModCod is lowered and the throughput is
reduced, the latency grows accordingly due to the block size being related to data rate, not symbol
rate.
Remembering that, for the ACM case, the system latency is equal to the latency of the worst-case
ModCod, DVB-S2 shows a severe penalty. For 16k short blocks, this calculates to be 329
milliseconds (+ WAN Buffer delay) versus 34 milliseconds (+ WAN Buffer delay) for VersaFEC ACM.
For 64k block DVB-S2, the core latency is 4 times higher. Assuming a WAN Buffer of 20
milliseconds:
•
Latency for 64k block DVB-S2 ACM at 100 ksps = 1336 milliseconds
17–8
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
Revision 15
MN-CDM625
•
Latency for 16k block DVB-S2 ACM at 100 ksps = 349 milliseconds
•
Latency for VersaFEC ACM at 100 ksps = 54 milliseconds
•
For the example shown, the latency for a 16k block DVB-S2 ACM scheme is
approximately 7 times higher than VersaFEC ACM.
•
The latency for a 64k block DVB-S2 ACM scheme is approximately 25 times
higher than VersaFEC ACM.
17.8 Configuring VersaFEC ACM in the CDM-625
VersaFEC ACM requires the correct hardware module (PL-0000264) to be installed
in the CDM-625, Version 1.4.0 (or higher) firmware, and the appropriate FAST code
for the maximum operating symbol rate.
Configuration is very straightforward from the CDM-625 front panel. For a detailed overview of
modem operations via the front panel, refer to Chapter 5. FRONT PANEL OPERATION.
To configure the CDM-625 for VersaFEC ACM operation, do these steps:
Step
Task
Front Panel VFD Mnemonic
1
(SELECT) CONFIG: MODE
Set the Tx and Rx modes as IP-ACM.
Mode:Tx=IP-ACM:None Rx=IP-ACM:None
(422,V35,G703s,Audio,LVDS,HSSI,IP,ASI)
2
(SELECT) CONFIG: TX  SYMB
Enter the desired transmit symbol rate. Note that
this is a fundamental departure from the way in
which the modem is typically configured.
Tx-IF Freq Power FEC Mod Symb Scrambler
(Data 00192.000kbps, 00131.657ksps)()
(SELECT) CONFIG: TX  POWER
Enter the desired transmit output level.
Output Power: Mode= Manual (Fixed)
Level= –20.0 dBm
()
3
TxSymbolRate = 01000.000 ksps (ACM Mode)
Data Invert=Off Clock Invert=Off ()
The Transmit symbol rate is limited by the FAST code installed. There are three options:
• 37 ksps to 300 ksps
4
• 37 ksps to 1200 ksps
(SELECT) CONFIG: RX  SYMB
Enter the desired receive symbol rate.
RxIF Freq FEC Demod Symb Descram Eq EbNo
(Data 02048.000kbps,02184.533ksps)()
Note that asymmetric operation is supported;
transmit and receive symbol rates do not have to be
equal.
5
• 37 ksps to 4100 ksps
(SELECT) CONFIG: ACM 
Configure the desired ACM operating parameters,
by selecting the ACM submenu from the CONFIG:
menu branch.
Proceeding from the CONFIG: ACM submenu:
17–9
RxSymbolRate = 01000.000 ksps (ACM Mode)
Data Invert=Off Clock Invert=Off ()
CONFIG: All
CnC EDMAC
Mode Tx Rx Clocks ACM
Misc Mask Remote IP ()
ACM Config: Min/Max-ModCod Unlock-Action
Target-EbNo-Margin
()
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
Revision 15
MN-CDM625
Step
Task
Front Panel VFD Mnemonic
5
(cont)
a)  Min/Max-ModCod: Define the range of
ModCods over which the system will operate.
ModCod0 is BPSK Rate 0.488 (0.49 bps/Hz), while
ModCod11 is 16-QAM Rate 0.853 (3.41 bps/Hz).
Min Modcod: 00 (B
Max Modcod: 00 (B
0.488 0.488 bps/Hz)
0.488 0.488 bps/Hz)
If you wish to constrain the system to run at a fixed ModCod, set the Min and Max ModCod
values to be equal.
The value of Max ModCod may be limited by other FAST codes installed. For example,
suppose the 4100 ksps FAST option is installed, and the symbol rate set to 4100 ksps, the
theoretical maximum data rate would be 14 Mbps at ModCod 11. However, is CnC is being
used, with a 10 Mbps FAST limit, the ACM Max ModCod will be limited to ModCod 7, or 9.6
Mbps.
b)  Unlock-Action: Choose the desired action
when the remote demod loses lock. This is
important, as the ACM system depends on the
feedback of the SNR metric from the remote demod
to determine the optimum ModCod. The choices
are:
When distant-end demod loses lock:
Go to min Tx ModCod (Maintain,Min)
()
Go to min Tx ModCod (recommended)
–or– Maintain Tx ModCod
c)  Target Eb/No margin: This is a VERY important
parameter. The ACM system is designed to switch
based on thresholds that correspond to a BER of 5 x
10-8 for each ModCod. However, in order to prevent
oscillation around two ModCods at this exact value,
0.3 dB of hysteresis has been added. The switch
points and the hysteresis are shown in Figure 17-3:
Target Eb/No Margin = 1.0 dB (0.0 – 4.5)
()
Figure 17-3. CDM-625 – ACM ModCod Switch Points
17–10
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
Revision 15
MN-CDM625
The graph shows the switch points with the Target Eb/No margin set to 0dB. However, the
switch points can be moved (increased) by configuring the Target Eb/No margin parameter,
which can vary from 0 to 4.5 dB, in 0.5dB steps. In a fading environment it is highly
recommended to add sufficient margin to maintain an adequate link quality (and to maintain
demod lock) during the interval between the Eb/No degrading and the ACM controller
responding by lowering the ModCod. See Sect. 17.11 Notes and Recommendations.
To continue with the configuration:
Step
6
Task
Front Panel Mnemonic
(SELECT) CONFIG: IP  Switch-set-up 
WAN
Enter the desired size of the WAN Buffer. The
minimum size is 20 milliseconds, and is referred to
the data rate corresponding to ModCod0. In order
to achieve minimum system latency, do not make
this value unnecessarily large.
Ethernet Switch: Mode WAN PerPortCnfg
MAC-Learning VLAN Qos Stats
()
17.9 Monitoring ACM performance
The CDM-625 provides several ways to determine the current state of the ACM system.
Use the front panel menu to select MONITOR: ACM. The current Tx and Rx ModCod, along with
the Local and Remote SNR, are displayed here. The SNR displays values between –3.0 dB and
+22.0 dB, with a resolution of 0.1 dB. If either the local or remote demod is unlocked, the SNR
will show ‘No Sync’. Of course, under MONITOR: Rx PARAMETERS, the Eb/No continues to be
displayed corrected for modulation type and code rate, in case you do not wish to deal with SNR
values.
If you wish to see the exact detail of the ModCod (data rate, modulation, code rate), then these
parameters can be seen under INFO: TX or INFO: Rx. Furthermore, if you are in a CONFIG: TX or
CONFIG: RX screen, both the symbol rate and data rate are displayed. All of these screens
update dynamically, so if a ModCod changes, the parameters are refreshed.
This information is also available through the Remote Control (serial interface), as well as the
Web Server, SNMP and Telnet interfaces.
If you wish to use the ‘Constellation over Ethernet’ application that comes with the released
code, it is also informative to see the demodulator changing type ‘on the fly’. With no noise, and
a modem in a loop on itself, you may wish to experiment with Min and Max ModCod values to
drive the adaptation.
Alternately, if you have access to an Oscilloscope in X-Y mode, the Alarms connector provides
analog voltages to monitor the constellation. This has the advantage that it will show a change
in modulation type instantaneously, unlike the ‘Constellation over Ethernet’ application, which
only updates once per second.
17–11
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
Revision 15
MN-CDM625
If you wish to verify that link performance is meeting the required level, the internal BERT tester
is an excellent tool. When using the IP interface it is not an easy matter to verify BER
performance, but the internal BERT will not only do this, but is also tolerant of the change in bit
rate that accompanies a change in ModCod. The BERT can be used to confirm that there are no
sync losses or bursts of bit errors when a ModCod changes.
17.10 ACM Congestion Control
When the ACM controller switches from a lower to a higher ModCod the bandwidth of the
Ethernet link is instantaneously increased. This is not a problem, and the link will adapt to push
more packets/second through the link.
Conversely, when the ACM controller switches from a higher to a lower ModCod the bandwidth
of the Ethernet link is instantaneously reduced. Unless the FIFO in the WAN encapsulator is
configured to be very large, the FIFO will tend to overflow, and packets will be lost before the
network recognizes that there is congestion, and reduces the rate at which packets are sent.
In order to mitigate packet loss when bandwidth is reduced, the CDM-625 ACM system
incorporates a method for congestion control. This is illustrated in Figure 17-4:
Figure 17-4. CDM-625 – ACM Congestion Control
The WAN FIFO (the size of which is configurable in the IP Switch setup) produces two control
signals that enable and disable the sending of Ethernet Pause Frames. A Pause Frame is an
Ethernet frame designed to implement flow control at the MAC layer. A switch supporting
802.3x can send a Pause Frame (with Pause time set to 0xFFFF) to force the link partner to stop
sending data. Devices use the Auto-Negotiation protocol to discover the Pause Frame
capabilities of the device at the other end of the link.
In the diagram it can be seen that when the WAN FIFO reaches a fill state of 87%, it signals the
Ethernet Switch to send Pause frames back to the LAN to inhibit the sending of further data. The
Pause Frames continue to be sent until the FIFO fill state has reduced to 75%. At this point,
normal operation in resumed by sending a Pause Frame with Pause time set to 0x0000. This
mechanism has been shown to be very effective at mitigating packet loss when the ACM
controller reduces bandwidth.
17–12
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
Revision 15
MN-CDM625
17.11 Notes and Recommendations
•
VersaFEC ACM is for point-to-point applications. It is required that both directions on the link
run in IP-ACM mode, although the symbol rates do not need to be equal. If you wish to
constrain one direction to run in CCM, simply set the Min and Max ModCod to be equal.
•
ACM constitutes a closed-loop control system (similar in concept to AUPC) and it should be
remembered that like all control systems, the speed at which the system can react is governed
by a number of factors, including the time taken to estimate SNR to the required accuracy,
and the transport delay over the satellite. Realistically, it can cope with fading and other link
impairments that do not exceed 1dB/second (more if Target Eb/No margin is increased).
•
The ACM controller algorithm that resides in the CDM-625 modem does not have to switch
through ModCods sequentially – it can change, if needed, directly from ModCod0 to
ModCod11 (or vice versa). When the demod first locks at ModCod0 the ACM controller will
examine the SNR from the remote end and switch directly to the ModCod that maximizes
throughput.
•
While ACM can do remarkable things, the fundamentals still apply. Don’t expect the demod to
run at a 16-QAM ModCod if the SNR instantaneously drops to 0dB – the demod will lose lock
and the system will recover by switching to ModCod0 (if so configured). We highly
recommend setting the Minimum ModCod to 0 (the ModCod of last resort) and set the
Unlock Action to ‘Go to minimum ModCod’. This will give the most robust link performance.
•
When running in ACM mode the demodulator is performing blind acquisition – meaning that it
has no a priori knowledge of the modulation type or code rate. For this reason the
demodulator acquisition time will be slower than in CCM mode. However, the acquisition time
is typically under 1 second for all symbol rates and noise conditions.
•
Running the ACM link with the Target Eb/No Margin set to 0dB will give the best utilization
of link power, but in conditions of fast fading may cause demod unlock events, or highly
degraded BER just prior to the switch to a lower ModCod. In order to mitigate this, we
recommend a Target Eb/No Margin of at least 1dB – more if the fading events are
particularly severe and/or frequent.
•
The value of Max ModCod may be limited by other FAST codes installed in the CDM-625. For
example, suppose the 4100 ksps FAST option is installed, and the symbol rate set to 4100
ksps, the theoretical maximum data rate would be 14 Mbps at ModCod 11. However, if CnC
is being used with a 10 Mbps FAST limit, then ACM Max ModCod will be limited to ModCod
7, or 9.6 Mbps. Therefore, if it is not possible to set the Maximum ModCod to the desired
value for a given symbol rate, you should check to determine what other FAST codes may be
limiting it.
•
The BER versus Eb/No performance of the ModCods is identical to the VersaFEC CCM modes
described in the FEC Options Chapter.
17–13
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
Revision 15
MN-CDM625
•
SNR is the preferred metric for driving the adaptation – this is the value displayed on the
monitor screens. If you want to convert this to Eb/No then remember that the relationship is
simply Eb/No = SNR - 10log (Spectral Efficiency).
•
To achieve minimum latency, set the WAN buffer to the smallest practical value. The default
setting is 20ms, and we recommend keeping it at this level.
•
At this time Comtech EF Data has chosen to disable AUPC while ACM is active. This may
change in the future, but for now, ACM should be considered to be a constant power,
constant symbol rate scheme.
•
All IP features that are available in the CDM-625 (VLAN, QoS, etc) are available when in IPACM mode. The Sub-Mux feature, however, is not available.
•
VersaFEC ACM is 100% compatible with Carrier-in-Carrier.
•
If required, VersaFEC ACM may be used in conjunction with any of the EDMAC modes, either
for serial remote control of the remote modem, or for SNMP proxy. It should be emphasized,
however, that unlike AUPC, a framing mode is not required for SNR reporting.
•
ACM maximizes throughput not only when Eb/No varies due to atmospheric conditions, but
will also mitigate the effects of other impairments, such as antenna pointing error, excessive
phase noise and certain types of interference. However, rapidly fluctuating impairments (~
less than 1 second) such as scintillation at low antenna look-angles at C-band will generally not
be improved by ACM.
•
VersaFEC ACM modes are not compatible with VersaFEC CCM modes, due to differences in
frame preambles.
•
The CDM-625 was purposely architected to provide the platform for VersaFEC ACM, and has
required new approaches to the signal processing employed in both modulator and
demodulator. It is the intention of Comtech EF Data to include VersaFEC ACM in future
modem platforms.
17–14
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
Revision 15
MN-CDM625
17.12 VersaFEC ACM – Summary of Specifications
System type
Adaptive Coding and Modulation, using BPSK, QPSK, 8-QAM , 16-QAM and
VersaFEC short-block LDPC coding – total of 12 ModCods
Symbol Rate Range
37-4100 ksps
Interface
10/100 Base T Ethernet, with auto-negotiated Congestion Control
Remote SNR reporting
Automatically reported from remote modem – built in function at the physical
layer – requires no additional overhead
Max span of data rate
7:1 over range of adaptation
Switch point (decreasing SNR)
Corresponds to SNR (Eb/No) that gives BER = 5 x 10-8
Switch point hysteresis
0.3 dB
Max fading rate
Approximately 1 dB/second (higher if Target Eb/No margin >1 dB)
Max ModCod update rate
One update every two seconds (no restriction on distance between ModCods)
Configurable parameters
System latency
Monitored parameters
Minimum and Maximum ModCod (ModCod0 through ModCod11)
Remote Demod Unlock Action: Maintain current ModCod
Go to minimum ModCod
•
Target Eb/No margin (0-4.5 dB, 0.5 dB steps)
54 ms max. (for a system operating at 100 ksps, and assuming a WAN
buffer of 20 ms, not including satellite path)
• Tx and Rx ModCods
• Local and Remote SNR
(-3.0 to +22.0dB, 0.1dB resolution, ±0.5 dB accuracy)
• Config and monitor menus displaying data rate, modulation and code rate update
dynamically with ModCod
Typical
Spectral Efficiency,
Min. Data Rate,
Max. Data Rate,
Eb/No, for
bps/Hz
ACM
mode
ACM mode
BER = 5 x 10-8
•
•
Modulation
Code Rate
BPSK
0.488
0.49
2.4 dB
18.1 kbps
2.00 Mbps
QPSK
0.533
1.07
2.2 dB
39.6 kbps
4.38 Mbps
QPSK
0.631
1.26
2.7 dB
46.7 kbps
5.16 Mbps
QPSK
0.706
1.41
3.4 dB
52.2 kbps
5.78 Mbps
QPSK
0.803
1.61
3.8 dB
59.6 kbps
6.60 Mbps
8-QAM
0.642
1.93
4.6 dB
71.5 kbps
7.91 Mbps
8-QAM
0.711
2.13
5.2 dB
78.8 kbps
8.73 Mbps
8-QAM
0.780
2.34
5.6 dB
86.6 kbps
9.59 Mbps
16-QAM
0.731
2.93
6.3 dB
108.5 kbps
12.01 Mbps
16-QAM
0.780
3.12
7.0 dB
115.5 kbps
12.79 Mbps
16-QAM
0.829
3.32
7.5 dB
122.8 kbps
13.61 Mbps
16-QAM
0.853
3.41
8.0 dB
126.2 kbps
14.00 Mbps
17–15
CDM-625 Advanced Satellite Modem
Adaptive Coding and Modulation (ACM)
Revision 15
MN-CDM625
Notes:
17–16
Chapter 18. IP PACKET
PROCESSOR OPTION
18.1
Overview
The IP Packet Processor is an optional feature for the CDM-625 Advanced Satellite Modem. In
addition to providing Layer 3 functionality, it incorporates a number of key features for Wide
Area Network (WAN) bandwidth optimization, including very low overhead Streamline
Encapsulation (SLE), Header Compression, Payload compression, Advanced Quality of Service
(QoS), and Advanced Encryption Standard (AES) Encryption.
The IP Packet Processor enables efficient IP networking and transport over satellite, in either
Router Mode or Managed Switch Mode, by adding routing capability with very low overhead
encapsulation, header compression, payload compression, and Quality of Service (QoS). The
Advanced QoS combined with header and payload compression ensures the highest quality of
service with minimal jitter and latency for real-time traffic, priority treatment of mission critical
applications and maximum bandwidth efficiency.
18.1.1
IP Packet Processor – Operational Requirements
The IP Packet Processor is available as a factory-installed option or, depending on
its originally shipped configuration, as a field-upgradeable option. Use of the IP
Packet Processor with the CDM-625 Advanced Satellite Modem requires the
following:
•
CDM-625 Power Requirements for the IP Packet Processor Board (CEFD P/N
PL-0000481): When ordering the IP Packet Processor as a factory installed option,
the modem power supply that is specified at the time of order must either be 175
watts for AC units, or 125 watts for DC units.
Existing field units that meet either power supply configuration requirement are
user-upgradable in the field using CEFD Kit KT-0000176 – refer to Section 18.5 in
this chapter for the field upgrade procedure using this kit.
However, existing field units that do not meet these power supply configuration
requirements – i.e., units that are configured with 65W AC or 65W DC power
supplies – must be returned either to Comtech EF Data or sent to a Comtech EF
18–1
CDM-625 Advanced Satellite Modem
IP Packet Processor Option
Revision 15
MN-CDM625
Data Authorized Service Center for upgrade using CEFD Kit KT-0000174 (for 65W
AC units) or CEFD Kit KT-0000175 (for 65W DC units).
•
18.1.2
CDM-625 Firmware Version 1.5.0 or later, which supports the IP Packet Processor
operational features. Factory-shipped units (i.e., units shipped with the IP Packet
Processor option) already have this firmware version pre-installed. However,
existing field units that do not run this firmware version (at a minimum) may
upgrade the firmware loads via the Flash Upgrade procedure explained in Chapter
4. UPDATING FIRMWARE.
Interoperability Compatibility/Limitations
A CDM-625 Advanced Satellite Modem that is equipped with the IP Packet Processor is not
interoperable for IP/Ethernet Traffic with a CDM-625 that is not equipped with the IP Packet
Processor.
18.2
IP Packet Processor Features
18.2.1
Streamline Encapsulation (SLE)
The IP Packet Processor includes Comtech EF Data’s patent-pending, very low overhead
Streamline Encapsulation (SLE). SLE can reduce the encapsulation overhead by as much as 65%
compared to industry-standard HDLC.
18.2.2
Modes of Operation
Chapter 16. ETHERNET NETWORK CONFIGURATION
A CDM-625 equipped with the IP Packet Processor can operate in four modes to support Pointto-Point and Point-to-Multipoint network topologies:
• Router Point-to-Point
• Router Remote
18.2.3
• Router Hub
• Managed Switch
Subsystem Multiplex (Sub-Mux)
Chapter 15. IP SUB-MUX
Sub-Mux is a secondary framing structure that combines IP traffic with any currently available
combination of framing and interface type (excluding IP itself). A specific, user-selected ratio
references the composite data rate to the modulator and from the demodulator to the primary,
non-IP interface rate.
18–2
CDM-625 Advanced Satellite Modem
IP Packet Processor Option
Revision 15
MN-CDM625
Sub-Mux capability can be used with the IP Packet Processor to multiplex a primary serial
synchronous or G.703 traffic stream with IP.
18.2.4
Adaptive Coding and Modulation (ACM)
Chapter 17. ADAPTIVE CODING AND MODULATION (ACM)
Comtech EF Data’s VersaFEC® Adaptive Coding and Modulation (ACM) feature, a patentspending technology wholly owned and developed by Comtech EF Data and CEFD sister division
Comtech AHA Corp., can be used with the IP Packet Processor to maximize throughput.
ACM converts available link margin into additional throughput, thereby maximizing throughput
under all conditions, including rain fade, inclined orbit satellite operation, antenna mispointing,
interference and other impairments.
18.2.5
FAST Options
• Sect. 5.2.8 SELECT: FAST Menus (Chapter 5. FRONT PANEL OPERATION)
• Appendix C. FAST ACTIVATION PROCEDURE
If there is a need to upgrade the CDM-625 IP Packet Processor’s functionality, Comtech EF Data
provides Fully Accessible System Topology (FAST), a technology that permits the purchase and
installation of options through special authorization codes. These unique Fast Access Codes may
be purchased from Comtech EF Data during normal business hours, and then loaded into the
unit using the front panel keypad.
Contact Comtech EF Data to acquire the following available FAST options:
•
Header Compression:
o Up to 5 Mbps (CCM) / 1200 ksps (ACM)
o Up to 15 Mbps (CCM) / 4100 ksps (ACM)
o Up to 25 Mbps (CCM) / 4100 ksps (ACM)
•
o Up to 10 Mbps (CCM) / 4100 ksps (ACM)
o Up to 20 Mbps (CCM) / 4100 ksps (ACM)
Payload Compression:
o Up to 5 Mbps (CCM) / 1200 ksps (ACM)
o Up to 15 Mbps (CCM) / 4100 ksps (ACM)
o Up to 25 Mbps (CCM) / 4100 ksps (ACM)
•
Quality of Service
•
AES Encryption
18–3
o Up to 10 Mbps (CCM) / 4100 ksps (ACM)
o Up to 20 Mbps (CCM) / 4100 ksps (ACM)
CDM-625 Advanced Satellite Modem
IP Packet Processor Option
Revision 15
MN-CDM625
18.2.5.1 Header Compression
The IP Packet Processor incorporates industry-leading header compression for IP traffic. Header
compression can reduce the 40-byte IP/UDP/RTP header to as little as 1 byte; for TCP/IP, the
40-byte header is reduced to as little as 3 bytes.
For applications such as Voice-over-IP (VoIP), header compression can provide bandwidth
savings exceeding 60%. For example, the 8 kbps G.729 voice codec requires 24 kbps of IP
bandwidth once encapsulated into an IP/UDP/RTP datagram. With header compression, the
same voice call needs about 8.5 kbps – a saving of almost 65%.
In addition, bandwidth requirements for typical Web/HTTP traffic can be reduced by 10% or
more with TCP/IP header compression.
18.2.5.2 Payload Compression
The IP Packet Processor features industry-leading payload compression for IP traffic.
Implemented in the hardware for maximum throughput and efficiency, payload compression
can reduce the required satellite bandwidth by as much as 40–50%.
18.2.5.3 Advanced Quality of Service (QoS)
The IP Packet Processor incorporates multi-level QoS to ensure the highest quality of service
with minimal jitter and latency for real-time traffic, priority treatment of mission critical
applications and maximum bandwidth efficiency.
The supported modes of QoS are:
•
DiffServ – Industry-standard method of providing QoS, enabling seamless co-existence in
networks that implement DiffServ
•
Max/Priority – Provides multi-level traffic prioritization with the ability to limit maximum
traffic per priority class
•
Min/Max – Provides a Committed Information Rate (CIR) to each user-defined class of
traffic with the ability to allow a higher burstable rate depending on availability
When using rule-based QoS, you can configure up to 32 different rules based on:
•
Source IP address and subnet mask
•
Destination IP address and subnet mask
•
Source Port
•
Destination Port
•
Protocols (well known)
•
Priority
18–4
CDM-625 Advanced Satellite Modem
IP Packet Processor Option
18.2.5.4
Revision 15
MN-CDM625
Advanced Encryption Standard (AES) Encryption
Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT:
•
•
•
Sect. 6.5.4.3.3.1 Configuration | Routing | Routes
Sect. 6.5.4.3.4 Configuration | Managed Switch
Sect. 6.5.4.3.5.3 Configuration | WAN | Encryption
When the AES Encryption option is active and enabled on a WAN route, the IP Packet Processor
will encrypt all outgoing traffic on the WAN, and decrypt any encrypted traffic it receives.
18.3 CDM-625 Operation with IP Packet Processor
Functionality and selection of the IP Packet Processor’s features and modes of operation, as
specified in the previous section, is seamless via the CDM-625’s operational interfaces.
Equipment monitor and control (M&C) is possible via the methods outlined in this section.
18.3.1
Front Panel Operation
Chapter 5. FRONT PANEL OPERATION
Using the keypad on the front panel, you may access a variety of nested
menus to configure the options available whenever the CDM-625 is
equipped with the IP Packet Processor.
18.3.2
Ethernet-based Remote Product Management
The CDM-625 10/100 BaseT Ethernet Management Interface supports three management
protocols for remote monitor and control (M&C) of the modem:
•
Simple Network Management Protocol (SNMP) – This requires a user-supplied Network
Management System (NMS) and a user-supplied Management Information Base (MIB) File
Browser.
•
Telnet Interface – This requires use of a user-supplied terminal emulation program such as
HyperTerminal (for use with the remote control protocol) or PuTTY (for use with the Telnet
Command Line Interface), installed on the User PC.
•
CDM-625 Web Server (HTTP) Interface – This requires a compatible user-supplied web
browser such as Internet Explorer.
18–5
CDM-625 Advanced Satellite Modem
IP Packet Processor Option
18.3.2.1
Revision 15
MN-CDM625
SNMP Interface
Sect. 6.3 SNMP Interface (Chapter 6. ETHERNET-BASED REMOTE PRODUCT
MANAGEMENT)
The Simple Network Management Protocol (SNMP) is an Internet-standard protocol for managing
devices on IP networks. An SNMP-managed network consists of three key components:
•
The managed device – This includes the CDM-625 Advanced Satellite Modem.
•
The SNMP Agent – The software that runs on the CDM-625. The CDM-625 SNMP Agent
supports both SNMPv1 and SNMPv2c.
•
The user-supplied Network Management System (NMS) – The software that runs on the
manager.
18.3.2.2
Telnet Interface
•
•
•
Sect. 6.4 Telnet Interface (Chapter 6. ETHERNET-BASED REMOTE PRODUCT
MANAGEMENT)
Appendix D. REMOTE CONTROL
Appendix E. TELNET COMMAND LINE INTERFACE (CLI) OPERATION
Comtech EF Data provides a Telnet interface for the purpose of equipment monitor and control
(M&C) using either the standard remote control protocol or, when the optional IP Packet
Processor is installed and enabled, the Telnet Command Line Interface (CLI).
18–6
CDM-625 Advanced Satellite Modem
IP Packet Processor Option
18.3.2.3
Revision 15
MN-CDM625
Web Server (HTTP) Interface
Sect. 6.5 Web Server (HTTP) Interface (Chapter 6. ETHERNET-BASED REMOTE
PRODUCT MANAGEMENT)
The embedded Web Server (HTTP) application provides an easy to use interface designed for
optimal performance when using Microsoft’s Internet Explorer Version 9.0 or higher. The
interface features enhanced functionality when the CDM-625 is equipped with the IP Packet
Processor.
18–7
CDM-625 Advanced Satellite Modem
IP Packet Processor Option
18.4
Revision 15
MN-CDM625
List of Supported Internet RFCs (Requests for Comment)
RFC No.
Description
768
User Datagram Protocol
791
Internet Protocol
793
Transmission Control Protocol
826
Ethernet Address Resolution Protocol
894
A Standard for the Transmission of IP Datagrams over Ethernet Networks
919
Broadcasting Internet Datagrams
922
Broadcasting Internet Datagrams in the Presence of Subnets
950
Internet Standard Subnetting Procedure
951
Bootstrap Protocol (BOOTP)
959
File Transfer Protocol
1071
Computing the Internet Checksum
1112
Host Extensions for IP Multicasting
1350
The TFTP Protocol
1700
Assigned Numbers
2236
Internet Group Management Protocol, Volume 2
2474
Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers
2475
An Architecture for Differentiated Services
2597
Assured Forwarding PHB
2598
An Expedited Forwarding PHB
2933
Internet Group Management Protocol MIB
3376
Internet Group Management Protocol, Volume 3
4293
Management Information Base for the Internet Protocol (IP)
18–8
CDM-625 Advanced Satellite Modem
IP Packet Processor Option
Revision 15
MN-CDM625
18.5
IP Packet Processor Field Upgrade Procedure
18.5.1
Overview
This section describes the procedure required to field upgrade any CDM-625-Advanced Satellite Modem having a 175W AC or 125W DC
Power Supply with the optional IP Packet Processor card. See Sections 18.1.1 and 18.1.2 in this chapter for a detailed description of the
requirements and limitations of using the IP Packet Processor with the CDM-625.
18.5.2
Requirements for Field Upgrade
•
CDM-625 Advanced Satellite Modem with 175W AC or 125W DC Power Supply, and Firmware Version 1.5.0 or later
•
Medium Phillips screwdriver
•
Needle-nose pliers
•
CEFD P/N KT-0000176 IP Packet Processor with Fan Upgrade Kit, containing:
CEFD Part Number
QTY
Description
PL-0000449
1
Fan Assembly, 40 x 40 x 10
FN/FGDC12V01
1
Fan Guard
HW/4-40X3/4PH
4
Screw, S.S., 4-40 x 3/4 LG, Pan Head Phillips
HW/440HXNUTLOC
4
Locking Hex Nut, S.S., 4-40
PL-0000481
1
CDM-625 IP Packet Processor Card
HW/SEM440X1/4PH
2
Screw, S.S., 4-40 x 1/4 LG, Pan Head Phillips
18–9
CDM-625 Advanced Satellite Modem
IP Packet Processor Option
18.5.3
Step
1
Revision 15
MN-CDM625
Field Upgrade Procedure
Task
Turn off the CDM-625 and disconnect the modem’s power
cord from its power source.
Next, use the screwdriver to remove the top cover mounting
hardware. Remove the cover from the CDM-625 chassis.
IMPORTANT: Be sure to retain the top cover mounting
hardware for cover re-installation once you have installed
the IP Packet Processor Card and its cooling fan.
18–10
CDM-625 Advanced Satellite Modem
IP Packet Processor Option
Step
2
3
Revision 15
MN-CDM625
Task
The illustration at right identifies the upgrade locations
within the chassis for:
•
Installation of the fan into the chassis;
•
Plug-in of both the fan power cable and IP Packet
Processor Card into the modem’s framing board;
•
Assembly of the IP Packet Processor Card onto the
chassis-mounted card bosses.
Unplug the front panel ribbon cable from its connector on
the modem’s framing board, and then move the cable out of
the way of the upgrade location.
18–11
CDM-625 Advanced Satellite Modem
IP Packet Processor Option
Step
4
Revision 15
MN-CDM625
Task
Use the screwdriver and pliers, as needed, to install the fan
(CEFD P/N PL-0000449) and fan guard (CEFD P/N
FN/FGDC12V01) securely into the chassis with the
provided mounting hardware (4X 4-40 x 3/4 pan head
screws and 4X 4-40 locking hex nuts) at the designated
location.
IMPORTANT: Refer to the arrow icons imprinted on the fan
housing when installing the fan, to ensure that:
5
•
The air flow is directed into the chassis during
operation and
•
The fan power cable is routed towards the power
connector on the modem’s framing board.
Use needle-nose pliers as needed to plug the fan power
cable receptacle into the mating connector on the modem’s
framing board.
IMPORTANT: Note the orientation of the fan’s power cable
receptacle and wiring to the mating connector and its pins
on the modem’s framing board.
18–12
CDM-625 Advanced Satellite Modem
IP Packet Processor Option
Step
6
Revision 15
MN-CDM625
Task
Prepare the IP Packet Processor Card for installation by
aligning its receptacle with the mating connector on the
modem’s framing board.
Plug the card firmly into the connector – take care not to
damage any top-mounted components. Similarly, be sure
not to damage the bottom of the card on the chassis’
mounting bosses while plugging the card receptacle into its
mating connector.
Installation is complete once the cable connector is fully
engaged within its mating receptacle, and the mounting
holes at the front of the card are aligned with the mounting
boss threaded holes.
7
Use the screwdriver to secure the IP Packet Processor card
to the chassis with its provided mounting hardware (2X 440 x 1/4 pan head screws).
18–13
CDM-625 Advanced Satellite Modem
IP Packet Processor Option
Step
Revision 15
MN-CDM625
Task
8
Plug the front panel ribbon cable back into its mating
connector on the modem’s framing board.
9
Use the screwdriver to reinstall the top cover onto the
CDM-625 chassis with its existing mounting hardware.
Plug the modem’s power cord back into its power source.
The CDM-625 IP Packet Processor upgrade is now complete. You may turn on and resume use of the modem.
18–14
Chapter 19. CARRIER ID
(MetaCarrier® )
19.1 Overview
CDM-625 Advanced Satellite Modems running Firmware Version 2.2.1 or later incorporate a
patent-pending carrier identification (CID) technique that uses MetaCarrier® spread spectrum
technology to embed a unique carrier identification sequence for the transmitted carrier.
The CDM-625 with MetaCarrier® provides a subset of the functionality of the Comtech EF Data
MCED-100 MetaCarrier® Embedding Device. It is used in tandem with the Comtech EF Data
MCDD-100 MetaCarrier® Detection Device to provide a complete MetaCarrier embedding and
decoding solution.
19.2 About MetaCarrier
The MetaCarrier concept employs a low-speed data sequence containing information about the
transmission carrier that is spread using Direct Sequence Spread Spectrum (DSSS), and then
combined with the transmission “desired” carrier to produce a composite carrier with an
embedded CID. The power level and bandwidth of the MetaCarrier is sufficiently low that it is
completely hidden below the desired carrier, and has minimal effect on system Eb/No
(approximately 0.1 dB).
The MetaCarrier operates independent of the modulation and forward error correction rate of
the transmitted carrier. In configurations where the carrier is encrypted or uses cryptographic
technologies, the CID contained in the MetaCarrier is not affected.
Traditionally, the method for identifying an interfering carrier involves using a geo-location
system that, in turn, uses the phase offset from an adjacent satellite to triangulate the
approximate location on the surface of the earth where the interference is being generated.
While such “tried-and-true” geo-locating methods have proven beneficial to satellite operators
and service providers, they are nevertheless imprecise. For example, in densely populated areas,
a helicopter equipped with a feed horn and spectrum analyzer must be used to find the exact
location of the transmission source; the time and costs associated with such methods are
significant.
19–1
CDM-625 Advanced Satellite Modem
Carrier ID (MetaCarrier®)
Revision 15
MN-CDM625
By contrast, Comtech EF Data’s CID products provide the operator with the interference
source’s identification information within seconds. Once the offending carrier is identified, the
uplinking station may be contacted and the request made to shut down or otherwise remove
the identified transmission from service.
The MCED-100’s combined carrier (transmission carrier + embedded MetaCarrier) creates a
composite carrier that results in scalable identification system that requires minimal power
(typically less than 0.1 dB) from the transmission carrier.
19.3 Functional Description
In a typical network, there can be many CDM-625s with MetaCarrier, and one (or more) MCDD100s to verify the presence of the MetaCarrier on each carrier. In an interference situation, the
MCDD-100 may be used to decode the MetaCarrier of an interfering carrier that may not be part
of one’s own transmission network, as long as the interfering carrier has an embedded
MetaCarrier.
The CDM-625 creates a composite carrier by first sizing the appropriate MetaCarrier, and then
by adding the spread spectrum CID (with power spectral density approximately 22 dB below the
transmission carrier’s spectral power density) to the transmission carrier.
The size of the MetaCarrier is determined based purely on symbol rate and is totally
independent of modulation and coding, resulting in three (3) discrete sizes of MetaCarrier being
combined with the transmission carrier. The available MetaCarrier sizes are as follows:
Original Carrier
≥256 ksps
128 ksps to < 256 ksps
64 ksps to < 128 ksps
Embedded MetaCarrier
224 kchips per sec *
112 kchips per sec
56 kchips per sec
32 ksps to < 64 ksps
< 32 ksps
28 kchips per sec
14 kchips per sec
*kchips per sec refers to the direct sequence spread spectrum chipping rate
As shown here, the MetaCarrier is sized to be no more than 87.5% of the bandwidth of the
transmission carrier. In all configurations of the combined carrier, the MetaCarrier raises the
transmission power less than 0.1 dB above the original carrier.
The CID message is composed of the following information:
•
CDM-625 MAC Address
•
Transmit carrier center frequency
•
Transmit carrier symbol rate
•
Custom message
Note that other fields supported in the MCED-100 are not included.
The entire CID message is broken into 18 packets containing 122 bits (formatting, FEC and user
information) for a total message length of 2,196 bits for the transmission of the MetaCarrier.
19–2
CDM-625 Advanced Satellite Modem
Carrier ID (MetaCarrier®)
Revision 15
MN-CDM625
Each packet of the MetaCarrier message carries 32 bits of CID information data. However, the
MAC address is sent at a higher rate (more often), so that upon reception of a frame that is
comprised of three (3) packets, the MAC address may be obtained.
The data rate of messages being carried in the MetaCarrier is shown before spreading is applied
and the associated time to send a complete CID message (including the framing and FEC). The
time for a complete message is only valid once the MCDD-100 has achieved lock to the
MetaCarrier that may cause the stated times to be longer:
Therefore, the time for the CDM-625 with MetaCarrier to insert a complete CID ID sequence is
as follows. Note that the time for unique ID may be shorter than shown, since upon achieving
lock to the MetaCarrier, the unique ID is made available immediately since MetaCarrier lock
requires the reception of three full packets to declare lock.
Embedded
MetaCarrier rate
224 kcps
112 kcps
56 kcps
28 kcps
14 kcps
CID Data Rate
56 bps
28 bps
14 bps
7 bps
3.5 bps
Time for Complete
Message
Time for Unique ID
41 seconds
82 seconds
164 seconds
328 seconds
656 seconds
6.9 seconds
13.8 seconds
27.6 seconds
55.2 seconds
110.4 seconds
19.4 Configure the CDM-625 for Carrier ID Operation
Carrier ID operation requires that you first enable Carrier ID feature operation, and then create
a MetaCarrier Custom Message. All other parameters (center frequency, symbol rate, and the
CDM-625’s MAC address) are set automatically. The CDM-625 provides several means for
configuring Carrier ID operation:
•
Local Control via the CDM-625 Front Panel keypad and VFD.
•
Remote Control with a user-supplied PC via the
o
CDM-625 Web Server (HTTP) Interface using a compatible Web browser.
o
Serial-based or Telnet-based Remote Control Interface using a terminal emulation
program or Windows Command-line.
o
Ethernet-based Simple Network Management Protocol (SNMP) using a Network
Management System (NMS) and Management Information Base (MIB) File Browser.
USE OF THE SERIAL-BASED REMOTE CONTROL INTERFACE, THE TELNET-BASED
REMOTE CONTROL INTERFACE, AND THE ETHERNET-BASED SNMP INTERFACE ARE
RECOMMENDED ONLY FOR ADVANCED USERS. COMTECH EF DATA STRONGLY
ENCOURAGES USE OF THE CDM-625 FRONT PANEL OR WEB SERVER (HTTP)
INTERFACE FOR MONITOR AND CONTROL (M&C) OF THE CDM-625.
19–3
CDM-625 Advanced Satellite Modem
Carrier ID (MetaCarrier®)
Revision 15
MN-CDM625
19.4.1 Enable Carrier ID Operation
19.4.1.1 Use the Front Panel Keypad and VFD to Enable Operation
Sect. 5.2.6.3 Utilities: CarrID (Chapter 5. FRONT PANEL OPERATION)
From the front panel main (SELECT:) menu, use the ◄ ► arrow keys to select the Utility menu
branch, and then press ENTER. Then, from the Utilities: screen, use the ◄ ► arrow keys to
select the CarrID submenu. Press ENTER to continue (the solid block indicates the cursor
position upon navigation to that display item):
SELECT: Configuration Test Monitor
Info Store/Ld Utility ODU FAST
()
Utilities: Set-RTC Display-Bright CarrID
LED Redundancy Circuit-ID Firmware
Em
Carrier ID:
Disabled
(Disabled, Enabled)
()
Use the ▲▼ arrow keys to select Carrier ID (MetaCarrier) operation as Enabled, and then press
ENTER.
19.4.1.2 Use the Web Server (HTTP) Interface to Enable Operation
Sect. 6.5.4.3.7 Configuration | Utilities (Chapter 6. ETHERNET-BASED REMOTE
PRODUCT MANAGEMENT)
Log in to the CDM-625 Web Server (HTTP)
Interface. Click the Configuration, and then
the Utilities navigation tabs. In the Circuit and
Carrier ID section of the ‘Configuration |
Utilities’ page, use the drop-down list to
select Carrier ID operation as Enabled, and
then click [Submit] to execute the selection.
19–4
CDM-625 Advanced Satellite Modem
Carrier ID (MetaCarrier®)
Revision 15
MN-CDM625
19.4.2 Create the MetaCarrier Custom Message
It is IMPORTANT to understand that Carrier ID and Circuit ID, while named similarly,
are two distinct features of the CDM-625. Read your documentation carefully.
19.4.2.1 Use the Front Panel Keypad and VFD to Create the Message
Sect. 5.2.6.6 Utilities: Circuit-ID (Chapter 5. FRONT PANEL OPERATION)
From the front panel main (SELECT:) menu, use the ◄ ► arrow keys to select the Utility menu
branch, and then press ENTER. Then, from the Utilities: screen, use the ◄ ► arrow keys to
select the Circuit-ID submenu. Press ENTER to continue (the solid block indicates the cursor
position upon navigation to that display item):
SELECT: Configuration Test Monitor
Info Store/Ld Utility ODU FAST
()
Utilities: Set-RTC Display-Bright CarrID
LED Redundancy Circuit-ID Firmware
Em
Edit this Modem’s Circuit ID:
()
---------------------------------------To compose a MetaCarrier Custom Message – On the bottom line, first use the ◄ ►arrow keys
to select the alphanumeric character space to edit, and then use the ▲▼ arrow keys to edit that
character.
You may use the following characters to compose a MetaCarrier Custom Message of 24
characters or less:
[Space] ( ) * + - , . / 0-9 and A-Z.
Press ENTER once you finish composing the MetaCarrier Custom Message string.
When you enable Carrier ID, the first 24 characters of the 40-character Circuit ID are
intended for and sent as the MetaCarrier Custom Message. While you must limit your
MetaCarrier Custom Message to 24 characters or less, the full 40 characters of the
Circuit ID will display on the front panel screen saver (see Sect. 5.1.3.1 Screen Saver).
19.4.2.2 Use the Web Server (HTTP) Interface to Create the Message
Sect. 6.5.4.3.7 Configuration | Utilities (Chapter 6. ETHERNET-BASED REMOTE
PRODUCT MANAGEMENT)
19–5
CDM-625 Advanced Satellite Modem
Carrier ID (MetaCarrier®)
Revision 15
MN-CDM625
After logging in to the CDM-625 Web
Server (HTTP) Interface, click the
Configuration and Utilities navigation
tabs. Then, in the Circuit and Carrier ID
section of the Configuration | Utilities page, enter the 24-characters-or-less MetaCarrier
Custom Message into the Circuit ID text box. Follow the naming requirements specified in the
previous section, and then click [Submit] once you finish composing the MetaCarrier Custom
Message string.
19–6
Chapter 20. QUALITY OF
SERVICE (QOS)
20.1 Overview
Quality of Service (QoS) enables a network to use WAN bandwidth more efficiently by managing
delay, jitter (delay variation), throughput, and packet loss.
The CDM-625 Advanced Satellite Modem incorporates two Per Hop Behavior (PHP) QoS
methods – Layer 2 QoS and Layer 3 QoS:
•
Layer 2 QoS is available on the CDM-625 by default when the optional IP Packet Processor
card is either not installed, or is installed but disabled. Layer 2 QoS is based on OSI model
Layer 2 header parameters such as IEEE 802.1q VLAN priority field, and is also based on the
CDM-625’s physical Ethernet port.
•
Layer 3 QoS requires the optional IP Packet Processor card to be installed and enabled, and
the Advanced QoS FAST option must be purchased and activated. Layer 3 QoS is based on
OSI model Layer 3 to Layer 7 protocol header parameters.
20.1.1 QoS Terminology
•
Latency – Latency is the amount of delay that is measured, in milliseconds, from the
Ethernet interface of the near-end modem to the Ethernet interface of the far-end modem.
•
Jitter – Jitter is the amount of variation that is measured, in milliseconds, between two
consequent frames at the receiving end.
20–1
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
20.2 Layer 2 QoS
See Chapter 5. FRONT PANEL OPERATION for complete information about using
this interface.
Layer 2 QoS is implemented on System on Chip (SoC) hardware having a total queue memory of
1 Mbits (128 Kilobytes). This limits traffic burst size to no more than 128 Kilobytes. The Layer 2
QoS system has four queues and four priorities; each queue is assigned to each priority with a
total of 128 KB for all four queues.
A Layer 2 QoS system uses the strict priority-scheduling algorithm – the higher the priority
number, the higher the priority. For example, a Priority 4 queue schedules and drains before a
Priority 3 queue; similarly, Priority 3 packets will schedule and drain before Priority 2 packets;
Priority 2 packets schedule and drain before Priority 1 packets. Priority 1 queue packets,
therefore, will schedule and drain only if QoS bandwidth is available after serving the three
higher-priority packet queues. High priority queues may starve low priority queues.
Three modes of Layer 2 QoS are available: Port-based, VLAN-based, or Port- and VLAN-based.
20.2.1 Modem Tx Data Rate vs. QoS Tx Data Rate
Modem Tx data rate can be set in 1 Kbps step size (resolution). In an idle situation, QoS Tx
bandwidth shall be the same as the modem’s Tx bandwidth. However, due to hardware
limitations the Layer 2 QoS Tx bandwidth can be set near to the modem’s data rate. Table 20-1
lists the step sizes for both CDM-625 hardware versions.
Note that the Layer 2 QoS scheduling algorithm runs on the basis of QoS Tx data rate; however,
the modem can send only the modem Tx data rate. In the event of difference between QoS data
rate and modem Tx data rate, after QoS scheduling the modem further clips the input data rate
to the modem Tx data rate without considering the scheduling priorities.
Table 20-1. Modem Tx Data Rate vs. QoS Tx Data Rate (Hardware-limited)
Modem Tx Data Rate
QoS Tx Data Rate
HW Ver. 2.1 or newer
HW Ver. Rev 1.1 or older
Less than 128 Kbps
64 Kbps steps
Limited to 128 Kbps
128 Kbps to 256 Kbps
64 Kbps steps
Limited to 256 Kbps
256 Kbps to 512 Kbps
64 Kbps steps
Limited 512 Kbps
512 Kbps to 1 Mbps
64 Kbps steps
Limited to 1 Mps
1 Mbps to 2 Mbps
1 Mbps steps
Limited to 2 Mbps
2 Mbps to 4 Mbps
1 Mbps Steps
Limited to 4 Mbps
4 Mbps to 8 Mbps
1 Mbps steps
Limited to 8 Mbps
8 Mbps to 25 Mbps
1 Mbps steps
Limited to 100 Mbps
20–2
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
QoS Example 1
QUESTION: If the modem Tx data rate is set to 180 Kbps, then what is the QoS Tx data rate?
ANSWER “A” – For HW version 2.1 or newer:
The QoS Tx data rate can be set from 64 Kbps to 1 Mbps, in 64 Kbps steps. If the 180 Kbps
modem Tx data rate is not in 64 Kbps step size, then the QoS Tx data rate will be the next 64
Kbps, which is 196 Kbps.
ANSWER “B” – For HW version 1.1 or older:
If the Modem Tx Data rate of 180 Kbps is greater than 128 Kbps but less than 256 Kbps, then the
modem Tx data rate will be set to 256 Kbps.
20.2.2 Flow Control
In Layer 2 QoS mode, the CDM-625 supports Ethernet-based pause frame control (IEEE 802.3).
Flow control can be enabled or disabled independently in any of the LAN ports. Flow Control
requires WAN Buffer Length to be large enough so that
Data Rate in kbps x buffer length / 4096 ≥ 24.
20.2.3 Port-based Layer 2 QoS
When selecting Port-based Layer 2 QoS, each port’s priority is configurable to a QoS queue
priority of 1 (lowest) to 4 (highest). In this mode, irrespective of traffic type, all traffic ingress on
a particular port is treated with the priority assigned to that port.
In the event any port is overdriven with ingress traffic, if there is insufficient queue memory to
store the packet, then the packet will be dropped and drop stats will be incremented against
that port.
QoS Example 2
•
Port-based Layer 2 QoS mode is selected.
•
Port Layer 2 QoS Priorities are set as follows:
o
Port 1 priority is set to 1;
o
Port 2 priority is set to 2;
o
Port 3 priority is set to 3;
o
Port 4 priority is set to 4.
•
The modem data rate is set to 1 Mbps.
•
The ingress traffic on each port is set to 250 Kbps.
20–3
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
QUESTION: What is the total output data rate and what is individual ports output data rate?
ANSWER “A” – For HW Ver. Rev 2.1 and newer:
•
Based on Table 20-1 for a modem Tx bandwidth of 1 Mbps, the QoS output bandwidth is set
to 1 Mbps.
•
Total Input data rate is 4X 250 Kbps = 1 Mbps
•
The output Data rate = 1 Mbps
•
Each ports data rate = 250 Kbps
ANSWER “B” – For HW Ver. Rev 1.1 and older:
•
Based on Table 20-1 for a modem Tx bandwidth of 1 Mbps, the QoS output bandwidth is set
to 1 Mbps.
•
Total Input data rate is 4X 250 Kbps = 1 Mbps
•
The output Data rate = 1 Mbps
•
Each ports data rate = 250 Kbps
QoS Example 3
•
Port-based Layer 2 QoS mode is selected.
•
Port Layer 2 QoS Priorities are set as follows:
o
Port 1 priority is set to 1;
o
Port 2 priority is set to 2;
o
Port 3 priority is set to 3;
o
Port 4 priority is set to 4.
•
The modem data rate is set to 2500 Kbps.
•
The ingress traffic on Ports 1 and 2 are set to 2 Mbps.
•
The ingress traffic on Port 3 is set to 800 Kbps.
•
The ingress traffic on Port 4 is set to 500 Kbps.
20–4
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
QUESTION: What is the total output data rate and what are the individual port output data
rates?
ANSWER “A” – For HW Ver. Rev 2.1 and newer:
•
Based on Table 20-1 for a modem Tx bandwidth of 2.5 Mbps, the QoS output bandwidth is
set to 3 Mbps.
•
Since the modem Tx bandwidth and QoS output data rates are not the same, after Layer 2
QoS prioritization the modem will further limit the output data rate to the Tx bandwidth of
the mode. The individual port data rates will henceforth be trimmed (normalized) to the
data rate of the modem Tx bandwidth without considering the priorities.
500 Kbps
Remaining Data
Rate* (After Serving
the Priority Queue)
2500 Kbps
500 x (2.5/3) = 417 Kbps
800 Kbps
800 Kbps
1700 Kbps
800 x (2.5/3) = 667 Kbps
2
2 Mbps
1700 Kbps
0 Kbps
1700 x (2.5 /3) = 1416 Kbps
1
2 Mbps
0 Kbps
0 Kbps
0 Kbps
5.3 Mbps
3 Mbps
0 Kbps
2.5 Mbps
Port
L2 QoS
Priority
Input
Data Rate
QoS Output
Data Rate
4
4
500 Kbps
3
3
2
1
Total ►
Output Data Rate
*After Priority 4, even though the actual modem TX data rate is 2500 kbps, the QoS
leftover data rate is still 2500 kbps since QoS bandwidth is 3000 kbps.
ANSWER “B” – For HW Ver. Rev 1.1 and older:
•
Based on Table 20-1 for a modem Tx bandwidth of 2.5 Mbps, the QoS output bandwidth is
set to 4 Mbps.
•
Since the modem Tx bandwidth and QoS output data rates are not the same, after Layer 2
QoS prioritization the modem will further limit the output data rate to the Tx bandwidth of
the modem. The individual port data rates will henceforth be trimmed (normalized) to the
data rate of the modem Tx bandwidth without considering the priorities.
Port
L2 QoS
Priority
Input
Data Rate
QoS Output
Data Rate
4
3
4
3
500 Kbps
800 Kbps
500 Kbps
800 Kbps
Remaining Data Rate
(After Serving the
Priority Queue)
3500 Kbps
2700 Kbps
2
2
2 Mbps
2000 Kbps
700 Kbps
1
1
2 Mbps
700 Kbps
0 Kbps
5.3 Mbps
4 Mbps
0 Kbps
Total ►
20–5
Output Data Rate
500 x (2.5/4)= 312.5 Kbps
800 x (2.5/4) = 500 Kbps
700 x (2.5 /4) = 1250
Kbps
700 x (2.5/4) = 432.5
Kbps
2.5 Mbps
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
20.2.4 VLAN-based Layer 2 QoS
When selecting VLAN-based Layer 2 QoS, the priority field is extracted from the 802.1q VLAN tag
as shown in Figure 20-1. The VLAN tag priority field is 3 bits, so the 802.1q protocol supports
eight priorities, from 0 to 7. However, because Layer 2 QoS has only four priorities as mentioned
previously, as shown in Table 20-2 these eight VLAN priorities are automatically mapped to four
internal priories.
Dest MAC
6 bytes
SRC MAC
6 bytes
Type(0x8100)
2 bytes
VLAN Tag
Priority
3bits
Data
CFI
1 bit
FCS
4 bytes
VLANid
12 bits
Figure 20-1. IEEE 802.1q VLAN priority
Table 20-2. 802.1q to Layer 2 QoS Priority Conversion
802.1q VLAN Priority Field
7 (b111)
6 (b110)
5 (b101)
4 (b100)
3 (b011)
2 (b010)
1 (b001)
0 (b000)
Layer 2 QoS Priority
Priority 4
Priority 3
Priority 2
Priority 1
Even though it is not necessary to configure multiple ports with VLANs, the VLAN QoS will not
look in the port information when classifying the packets into queue.
Similar to the Port-based scheduler, VLAN-based QoS also observes strict priority-based
scheduling. Should overdriving of VLAN priority traffic occur, the packet will be dropped and
drop stats will be incremented against that port.
In case VLAN Q-in-Q (double VLAN tag), the L2 VLAN QoS considers first VLAN tag
priority field only for traffic prioritization.
20–6
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
QoS Example 4
1. VLAN-based Layer 2 QoS mode is selected.
2. The modem data rate is set to 1 Mbps.
3. Four streams of VLAN ingress traffic is sent to the modem with VLAN Priorities set to 7, 5, 3,
and 1, respectively.
4. The data rate for each stream is set to 500 Kbps.
QUESTION: What is the total output data rate and what are the individual port output data
rates?
ANSWER “A” – For HW Ver. Rev 2.1 and newer:
•
Based on Table 20-1 for a modem Tx bandwidth of 1 Mbps, the QoS output bandwidth is set
to 1 Mbps.
•
Total Input data rate is 4X 500 Kbps = 2 Mbps
•
Based on Table 20-2, the VLAN Priorities 7, 5, 3, and 1 are mapped, respectively, to L2 QoS
Priorities 4, 3, 2, and 1.
•
Since the modem Tx bandwidth and QoS output data rates are the same, there is no need
for normalization.
•
The data rate for each port is as follows:
VLAN
Priority
7
L2 QoS
Priority
4
5
3
3
1
Total ►
500 Kbps
QoS Output Data
Rate
500 Kbps
Remaining Data Rate (After
Serving the Priority Queue)
500 Kbps
Output Data
Rate
500 Kbps
500 Kbps
500 Kbps
0 Kbps
500 Kbps
2
500 Kbps
0 Kbps
0 Kbps
0 Kbps
1
500 Kbps
0 Kbps
0 Kbps
0 Kbps
2 Mbps
1 Mbps
0 Kbps
1 Mbps
Input Data Rate
ANSWER “B” – For HW Ver. Rev 1.1 and older:
•
Based on Table 20-1 for a modem Tx bandwidth of 1 Mbps, the QoS output bandwidth is set
to 1 Mbps.
•
Total Input data rate is 4X 500 Kbps = 2 Mbps.
•
Based on Table 20-2, the VLAN Priorities 7, 5, 3, and 1 are mapped, respectively, to L2 QoS
Priorities 4, 3, 2, and 1.
20–7
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
•
Since the modem Tx bandwidth and QoS output data rates are the same, there is no need
for normalization.
•
The data rate for each port is as follows:
VLAN
Priority
7
L2 QoS
Priority
4
5
3
3
1
Total ►
500 Kbps
QoS Output Data
Rate
500 Kbps
Remaining Data Rate (After
Serving the Priority Queue)
500 Kbps
Output Data
Rate
500 Kbps
500 Kbps
500 Kbps
0 Kbps
500 Kbps
2
500 Kbps
0 Kbps
0 Kbps
0 Kbps
1
500 Kbps
0 Kbps
0 Kbps
0 Kbps
2 Mbps
2 Mbps
0 Kbps
1 Mbps
Input Data Rate
QoS Example 5
1. Port- and VLAN-based Layer 2 QoS mode is selected.
2. Port Layer 2 QoS Priorities are set as follows:
•
Port 1 priority is set to 1;
•
Port 3 priority is set to 3;
•
Ports 2 and 4 priorities are set to trunk mode (native disabled).
3. The modem data rate is set to 4000 Kbps.
4. The ingress traffic on Port 1 is set to 2 Mbps.
5. The ingress traffic on Port 3 is set to 1600 Kbps.
6. The ingress traffic on Port 2 is set to 2000 Kbps with a VLAN Priority of 1.
7. The ingress traffic on Port 4 is set to 800 Kbps with a VLAN Priority of 7.
QUESTION: What is the total output data rate and what are the individual port output data
rates?
ANSWER “A” – For HW Ver. Rev 2.1 and newer:
•
Based on Table 20-1 for a modem Tx bandwidth of 4 Mbps, the QoS output bandwidth is set
to 4 Mbps.
•
Since the modem Tx bandwidth and QoS output data rates are the same, there is no need
for normalization.
•
Based on Table 20-2, the VLAN Priorities 7 and 1 are mapped, respectively, to L2 QoS
Priorities 4 and 1.
20–8
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
•
Revision 15
MN-CDM625
The data rate for each port is as follows:
Port
4
3
2
1
VLAN
Priority
L2 QoS
Priority
7 (b111)
N/A
1 (b001)
N/A
Total ►
4
3
1
1
Input Data Rate
800 Kbps
1600 Kbps
2 Mbps
2 Mbps
5.3 Mbps
QoS Output Data Rate
= Modem Output Data
Rate
800 Kbps
1600 Kbps
800Kbps
800 Kbps
4 Mbps
Remaining Data Rate (After
Serving the Priority Queue)
3200 Kbps
1600 Kbps
800Kbps
800 Kbps
0 Mbps
ANSWER “B” – For HW Ver. Rev 1.1 and older:
•
Based on Table 20-1 for a modem Tx bandwidth of 4 Mbps, the QoS output bandwidth is set
to 4 Mbps.
•
Since the modem Tx bandwidth and QoS output data rates are the same, there is no need
for normalization.
•
Based on Table 20-2, the VLAN Priorities 7 and 1 are mapped, respectively, to L2 QoS
Priorities 4 and 1.
•
The data rate for each port is as follows:
Port
VLAN
Priority
L2 QoS
Priority
Input Data Rate
4
7 (b111)
4
800 Kbps
QoS Output Data Rate
= Modem Output Data
Rate
800 Kbps
3
N/A
3
1600 Kbps
1600 Kbps
1600 Kbps
2
1 (b001)
1
2 Mbps
800Kbps
800Kbps
N/A
1
2 Mbps
800 Kbps
800 Kbps
5.3 Mbps
4 Mbps
0 Mbps
1
Total ►
Remaining Data Rate (After
Serving the Priority Queue)
3200 Kbps
1. Layer 2 QoS can be enabled only when the optional Packet Processor is
not enabled.
2. Layer 2 QoS is implemented on System on Chip (SoC) hardware with a
total queue memory of 1 Mbits (128 Kbytes). Layer 2 QoS therefore
cannot accept traffic bursts requiring more than 128 Kbytes of storage.
20–9
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
20.3 Layer 3 QoS
Layer 3 QoS scheduling operates on modem Tx bandwidth with 1-byte resolution, so there is
further trimming or clipping data rate after the QoS scheduler.
Layer 3 QoS is implemented with at least one 1-second burst at maximum data rate. So Layer 3
QoS can process much larger bursts than Layer 2 QoS.
Excluding the default queue, the Layer 3 QoS system has up to 32 QoS with 8 configurable
priorities rules. The Layer 3 QoS system creates a separate queue for each rule to store the
incoming stream of packets. (In this chapter, ‘QoS rules’ and ‘QoS queues’ are interchangeable).
Layer 3 QoS systems use a strict priority QoS scheduling algorithm. Layer 3 QoS priority numbers
are inverse to Layer 2 QoS system numbers – the lower the priority number, the higher the
priority. For example, a Priority 1 queue schedules and drains before a Priority 2 queue;
similarly, Priority 2 packets will schedule and drain before Priority 3 packets, etc.
Layer 3 QoS systems incorporates WRED (Weighted Random Early Detection) based congestion
avoidance algorithm in addition to tail drop.
Three modes of Layer 3 QoS are available: MAX-Pri (Max-Priority), MIN-MAX (MinimumMaximum), and DiffServ (Differentiated Services).
20.3.1 Layer 3 QoS Max-Pri Mode
In Max-Pri mode, up to 32 QoS rules can be configurable using source IP subnet, destination IP
subnet, source port range, destination port range, and protocol. For each created rule, you can
also set the QoS treatments such as priority, limiting the maximum bandwidth, WRED enable or
disable, and filter enable or disable.
When WRED is enabled for a specific queue, QoS randomly drops packets after reaching 50% of
the QoS queue.
When the FILTER option is enabled for a rule, Layer 3 QoS provides the ability to filter the packet
completely.
20–10
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
QoS Example 6
1. Max-Pri Layer 3 QoS mode is selected.
2. Modem Tx bandwidth is set to 2048 Kbps (E1 rate).
3.
The Max-Pri QoS rules are configured as follows:
Index
Protocol
VLAN
Range
TOS
Src IP/
mask
Dest
IP/
mask
Min Src
Port
Max
Src
Port
Min
Dst
Port
Max
Dst
Port
Max
BW
Priority
Filter
WRED
1
UDP
0-4094
255
***/*
***/*
0
65535
0
65535
644
1
N
N
2
TCP
0-4094
255
***/*
***/*
0
65535
0
65535
99999
2
N
N
3
HTTP
0-4094
255
***/*
***/*
0
65535
0
65535
99999
3
N
N
4
Def
0-4094
255
****/*
***/*
0
65535
0
65535
99999
9
N
N
4. The input data streams are as follows:
Stream
Protocol
VLAN Range
TOS
Src IP
Dest IP
Src Port
Dest Port
Steam Data
Rate
1
UDP
0-4094
255
***/*
***/*
***
***
1024
2
TCP
0-4094
255
***/*
***/*
***
***
1024
3
HTTP
0-4094
255
***/*
***/*
***
***
1024
4
IP
0-4094
255
***/*
***/*
***
***
64
QUESTION: What are the total output data rates and the individual stream data rates?
ANSWER: The individual stream data rates are as follows:
QoS
Rule
Layer 3 QoS
Priority
Input Data Rate
QoS Output Data Rate
1
1
1024 Kbps
644 Kbps
due to max clipping
2
2
1024 Kbps
1024 Kbps
380 Kbps
3
3
1024 Kbps
380Kbps
0 Kbps
4
9
64 Kbps
0
0 Kbps
3136 Kbps
2048 Kbps
0 Kbps
Total ►
20–11
Remain Data Rate (After Serving
the Priority Queue)
1404 Kbps
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
20.3.2 Layer 3 QoS Min-Max Mode
In Min-Max mode, up to 32 QoS rules can be configurable using source IP subnet, destination IP
subnet, source port range, destination port range, and protocol. For each created rule, you can
also set the QoS treatment, such as guaranteed minimum bandwidth, maximum clipping
bandwidth, WRED enable or disable, and filter rule.
When WRED is enabled for a specific queue, QoS randomly drops packets after reaching 50% of
the QoS queue.
When the FILTER option is enabled for a rule, Layer 3 QoS provides the ability to filter the packet
completely.
QoS Example 7
1. Min-Max Layer 3 QoS mode is selected.
2. Modem Tx bandwidth is set to 20 Mbps.
3. The Min-Max QoS rules are configured as follows:
Index
Protocol
VLAN
Range
TOS
Src IP/
mask
Dest
IP/
mask
Min
Src
Port
Max
Src
Port
Min
Dst
Port
Max
Dst
Port
Min
BW
Max
BW
Priority
Filter
WRED
1
UDP
0-4094
255
***/*
***/*
0
65535
0
65535
2500
4000
1
N
N
2
TCP
0-4094
255
***/*
***/*
0
65535
0
65535
2500
99999
2
N
N
3
HTTP
0-4094
255
***/*
***/*
0
65535
0
65535
0
99999
3
N
N
4
Def
0-4094
255
****/*
***/*
0
65535
0
65535
0
9999
9
N
N
4. The input data streams are as follows:
Stream
Protocol
VLAN Range
TOS
Src IP
Dest IP
Src Port
Dest Port
Steam Data
Rate
1
UDP
0-4094
255
***/*
***/*
***
***
10000 Kbps
2
TCP
0-4094
255
***/*
***/*
***
***
5000 Kbps
3
HTTP
0-4094
255
***/*
***/*
***
***
7000 Kbps
4
DEF
0-4094
255
***/*
***/*
***
***
10000 Kbps
QUESTION: What are the total output data rates and the individual stream data rates?
ANSWER:
•
In Min-Max QoS mode, other than the default rule, which is configured as Priority 9, all QoS
rules are configured as Priority 8.
20–12
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
•
In this mode, the minimum bandwidth for all rules – the excluding the default rule – will be
served first in round robin fashion.
In this example, the total minimum BW for Rules 1 and 2 is 5000 Kbps. Since the total
bandwidth is 20 Mbps, it has enough bandwidth to serve.
•
After serving the minimum bandwidth, the leftover bandwidth is 15 Mbps (20,000 Kbps–
5000 Kbps).
•
Leftover bandwidth will be served among all rules in round robin fashion until it hits
maximum bandwidth limitations.
•
Each rule’s bandwidth is 15/3 = 5000 Kbps.
•
Since Rule 1 maximum clipping was set to 4000 Kbps, and minimum bandwidth has already
taken 2500 bytes, it will use 1500 Kbps more before reaching the maximum clipping. The
leftover 3500 Kbps (5000-1500=3500) is again given to the main pool.
•
Rule 2 does not have enough traffic coming in, so it will use only 2500 kbps (5000-2500);
the remaining bandwidth (5000-2500=2500) is again given to the main pool.
•
Rule 3’s input stream is 7000 bytes; it will take its share of the 5000 allocation. Still, it needs
7000-5000=2000).
•
After serving the fair share, the total leftover bandwidth is 6000 kbps (3500+2500=6000).
•
Since Rule 3 needs the bandwidth, the leftover bandwidth is applied to that rule.
•
After serving Rule 3, the leftover bandwidth 4000 Kbps will be applied to the default queue.
•
The default rule will see the data rate of 4000 Kbps.
The individual rule’s data rates are as follows:
QoS Rule
Layer 3 QoS Priority
Input Data Rate
QoS Output Data Rate
1
1
10000 Kbps
4000 Kbps
2
2
5000 Kbps
5000 Kbps
3
3
7000 Kbps
7000 Kbps
4
9
10000 Kbps
4000 Kbps
32000 Kbps
20000 Kbps
Total ►
20–13
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
20.3.3 Layer 3 QoS DiffServ Mode
Layer 3 DiffServ QoS is fully compliance to RFC standards. When the Layer 3 QoS mode is set to
DiffServ, the system automatically configures the rules with DSCP code points, priority values,
and WRED. You can only configure the service rate and drop precedence levels for Assured
Forwarding (ASFD) classes.
20.3.3.1
Layer 3 QoS Congestion Avoidance
The Layer 3 QoS system supports Weighted Random Early Detection (WRED) based congestion
avoidance. WRED can be enable or disabled on any queue. When WRED is disabled, upon
overdriving the queue the packets will be tail dropped.
QoS Example 8
1. DiffServ Layer 3 QoS mode is selected.
2. The modem Tx bandwidth is set to 10 Mbps.
3. The data rate of the modem drops down from 10 Mbps to 8.7 Mbps due to EbNo.
4. The input data streams to the modem are the same as those of QoS Example 7.
QUESTION: What is the total output data rate and what are the individual port output data
rates?
ANSWER:
• The Layer 3 QoS system first drains Priority 1 traffic. Since the management data stream is
only 200 Kbps, after serving Priority 1 traffic, QoS still has 9.8 Mbps (10.0-0.2=9.8).
• QoS next drains Priority 2’s 800 Kbps traffic. After the end of the Priority 2 traffic, QoS still
•
has 9 Mbps traffic available (9.8-0.8=9).
Similarly, QoS walks through all priorities until it hits the ASFD classes:
o The beginning of ASFD Classes QoS leftover bandwidth is 2 Mbps.
o All ASFD classes have the same Priority of 7, with different service rates.
o ASFD service rate is a Committed Information Rate (CIR), except serviced if bandwidth
available after serving all high priority queues. In this case, 2 Mbps bandwidth is
available, serving all service rates first. The total of all ASFD service rates are 1.6 Mbps,
which is less than the 2 Mbps leftover bandwidth.
o After serving the service rates, the leftover bandwidth is 400 Kbps. This 400 Kbps will be
distributed to all ASFD classes equally in round robin fashion until either there is no
more bandwidth, or the input streams have no data.
20–14
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
•
Revision 15
MN-CDM625
The resulting individual data rates are as follows:
Stream
Priority
PHB / DSCP Code
Service Rate
Drop Precedence
Data Rate
Management
1
CS7 / b111000
200 Kbps
9.8 Mbps
200 Kbps
Networking
Control
2
CS6 / b110000
800 Kbps
9.0 Mbps
800 Kbps
Voice
3
EXFD / b101110
1 Mbps
8.0 Mbps
1Mbps
Video
3
CS5 / b101000
4 Mbps
4.0 Mbps
4 Mbps
Data-1
4
CS4 / b100000
550 Kbps
3450 Kbps
550 Kbps
Data-2
5
CS3 / b011000
1450
2000 Kbps
1450 Kbps
Data-3
7
ASFD4 / b100010
1 Mbps
NA
100 + 100 Kbps
Data-4
7
ASFD3 / b011010
1 Mbps
NA
400 + 100 Kbps
Data-5
7
ASFD2 / b010010
1 Mbps
NA
500 + 100 Kbps
Data-6
7
ASFD1 / b001010
1 Mbps
NA
800 + 100 Kbps
Data-7
8
BE / bXXXXXX
2 Mbps
NA
0 Kbps
14 Mbps
0 Kbps
10 Mbps
Total ►
20.3.3.2
Layer 3 QoS List of Supported RFCs (Requests for Comment)
RFC No.
Description
2474
“Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers”
Nichols, K., Blake, S., Baker, F. and D. Black, December 1998
2475
“An Architecture for Differentiated Services”
Blake, S., Black, D., Carlson, M., Davies, E., Wang, Z. and Weiss, W., December 1998
2597
“Assured Forwarding PHB”
Heinanen, J., Baker, F., Weiss, W. and J. Wrocklawski, June 1999
2598
“An Expedited Forwarding PHB”
Jacobson, V., Nichols, K. and K. Poduri, June 1999
20–15
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
20.4 QoS with ACM (Adaptive Coding and Modulation)
When ACM is enabled, the modem is configured with symbol rate. However, while the QoS
system recognizes data rate, both Layer 2 QoS and Layer 3 QoS operate on data rate. Therefore,
while the symbol rate will be constant in ACM mode, the data rate will not be constant. As a
result, the modem’s data rate can vary "on-the-fly” based on the EbNo. The data rate can be
more or less than when QoS was first configured, or when the modems first boots.
20.4.1 Maximum Clipping
Due to ACM, when in QoS Max-Pri mode and the data rate’s available bandwidth exceeds the
maximum clipping rate, the QoS system limits the output rate of that rule to configured
maximum clipping rate.
When the available data rate is less than the maximum clipping rate, the QoS system has
nothing to clip, since it has not exceeded the defined maximum bandwidth rate.
20.4.2 Minimum Data Rate
Due to ACM, when the data rate’s available bandwidth exceeds the minimum data rate (per QoS
Min-Max and DiffServ modes’ ASFD classes), the QoS system operates as normal; since the
minimum has been met, the available bandwidth is shared among all other same priorities in
round robin fashion.
When the available data rate is less than the minimum data rate, then the QoS system shares
equally among all same priority queues in a round robin fashion until either minimum
bandwidth is met, or no more data is available to drain.
QoS Example 9
1. DiffServ Layer 3 QoS mode is selected.
2. ACM is enabled.
3. The data rate of the modem drops down from 10 Mbps to 8.7 Mbps due to EbNo.
4. Input data streams are the same as with QoS Example 7 (see Sect. 20.3.2).
QUESTION: What will be the total data rate and what will be the individual data rates?
ANSWER:
•
After serving all high priority queues, only 500 Kbps is left for ASFD classes.
•
This leftover bandwidth is less than the total minimum bandwidth; it must therefore share
the residual 500 Kbps among all four ASFD classes equally - i.e., 500/4=175 Kbps per class.
20–16
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
•
Since ASFD 4 has the service rate 100 Kbps, the excess 75 Kbps will be given the other
queues where the service rate not met.
•
In this case the 75 Kbps again will share equally among ASFD3, ASFD2, and ASFD1 since
these service rates were not met.
•
The resulting individual data rate is as follows:
Stream
Priority
PHB / DSCP Code
Input Data rate
Leftover BW (After
Serving the Queue)
QoS output Data rate
Management
1
CS7 / b111000
200 Kbps
9.8 Mbps
200 Kbps
Networking
Control
2
CS6 / b110000
800 Kbps
9.0 Mbps
800 Kbps
Voice
3
EXFD / b101110
1 Mbps
8.0 Mbps
1Mbps
Video
3
CS5 / b101000
4 Mbps
4.0 Mbps
4 Mbps
Data-1
4
CS4 / b100000
550 Kbps
3450 Kbps
550 Kbps
Data-2
5
CS3 / b011000
1450
2000 Kbps
1450 Kbps
Data-3
7
ASFD4 / b100010
1 Mbps
NA
100 Kbps
Data-4
7
ASFD3 / b011010
1 Mbps
NA
175 + 25 Kbps
Data-5
7
ASFD2 / b010010
1 Mbps
NA
175 + 25 Kbps
Data-6
7
ASFD1 / b001010
1 Mbps
NA
175 + 25 Kbps
Data-7
8
BE / bXXXXXX
2 Mbps
NA
0 Kbps
14 Mbps
0 Kbps
8.7 Mbps
Total ►
20–17
CDM-625 Advanced Satellite Modem
Quality of Service (QoS)
Revision 15
MN-CDM625
Notes:
20–18
Appendix A. CABLE DRAWINGS
A.1
Overview
The EIA-530 standard pinout that is provided on the CDM-625 is becoming more popular in many applications. However, there are still
many occasions – especially for existing EIA-422/449 and V.35 users – when a conversion is required. This appendix provides information
for the conversion cables needed for these situations:
•
Figure A-1 depicts the cable required for EIA-530 -to- EIA-422/449 DCE conversion.
•
Figure A-2 depicts the cable required for EIA-530 -to- V.35 DCE conversion.
•
Figure A-3 depicts a standard EIA-232 cable for connection between the CDM-625 Rear Panel Remote Control port and any serial
port on the user PC.
All dimensions, where specified in the illustrations featured in this appendix, are in inches.
A-1
CDM-625 Advanced Satellite Modem
Appendix A
Revision 15
MN-CDM625
A.1.1 EIA-530 to EIA-422/449 DCE Conversion Cable
Use the EIA-530 to EIA-422/449 DCE Conversion Cable (Figure A-1) for connections between the CDM-625 and the user data.
Figure A-1. EIA-530 to EIA-422/449 DCE Conversion Cable (CEFD P/N CA/WR0049)
A-2
CDM-625 Advanced Satellite Modem
Appendix A
Revision 15
MN-CDM625
A.1.2 EIA-530 to V.35 DCE Conversion Cable
Use the EIA-530 to V.35 DCE Conversion Cable (Figure A-2) for connections between the CDM-625 and the user data.
Figure A-2. EIA-530 to V.35 DCE Conversion Cable
A-3
CDM-625 Advanced Satellite Modem
Appendix A
Revision 15
MN-CDM625
A.1.3 EIA-232 Remote Control Cable
Use the EIA-232 Remote Control Cable (Figure A-3) for firmware updates in the absence of an Ethernet-based connection. You may also
use this cable for serial-based M&C of the CDM-625. Connect this cable from the CDM-625 Rear Panel Remote Control port to any User
PC serial port.
Figure A-3. EIA-232 Remote Control Cable (CDM-625 Remote Control Port to PC 9-Pin Serial Port)
A-4
Appendix B. Eb/No
MEASUREMENT
Although the CDM-625 Advanced Satellite Modem calculates and displays the value of receive
Eb/N0 on the front panel of the unit, it is sometimes useful to measure the value using a
spectrum analyzer, if one is available.
The idea is to accurately measure the value of (Co+No)/No, (Carrier density + Noise density/Noise
density). This is accomplished by tuning the center frequency of the Spectrum analyzer to the
signal of interest, and measuring the difference between the peak spectral density of the signal
(the flat part of the spectrum shown) and the noise density.
To make this measurement:
•
Use a vertical scale of 1 or 2 dB/division.
•
Set the Resolution Bandwidth of the Spectrum Analyzer to < 20 % of the symbol rate.
•
Use video filtering and/or video averaging to reduce the variance in the displayed trace to a
low enough level that the difference can be measured to within 0.2dB.
•
Place a marker on the flat part of the signal of interest, then use the MARKER DELTA
function to put a second marker on the noise to the side of the carrier. This value is
(Co+No)/No, in dB.
•
Use this value of (Co+No)/No in the table on the following page to determine the Eb/No. You will
need to know the operating mode to read from the appropriate column.
•
If the (Co+No)/No value measured does not correspond to an exact table entry, interpolate
using the two nearest values.
Note that the accuracy of this method degrades significantly at low values of (Co+No)/No
(approximately less than 6 dB).
B–1
CDM-625 Advanced Satellite Modem
Appendix B
Revision 15
MN-CDM625
Example: In the above diagram, the (Co+No)/No measured is 4.6 dB. If Rate 1/2 QPSK is used,
this corresponds to an Eb/N0 of approximately 2.6 dB. The exact relationship used to derive the
table values is as follows:
Eb/N0=10log10(10(Co+No/No)/10)-1)-10log10(FEC Code Rate)-10log10(bits/symbol)
Where:
•
•
•
•
•
•
Eb/N0 and (Co+No)/ No are expressed in dB;
bits/symbol = 1 for BPSK;
bits/symbol = 2 for QPSK;
bits/symbol = 3 for 8-PSK/8-QAM;
bits/symbol = 4 for 16-QAM;
FEC Code Rate for ‘uncoded’ = 1.
Note: Pay close attention to the sign of the middle term.
Chapter 12. ESC++ explains how the Eb/No performance degrades when ESC++ is
used, particularly at lower data rates, where the percentage overhead is high.
B–2
B–3
Notes:
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
0.7
1.2
1.7
2.1
2.6
3.0
3.9
4.8
5.6
6.3
7.1
7.7
8.4
9.0
9.6
10.3
10.8
11.4
12.0
12.5
13.1
13.6
14.2
14.7
15.2
15.8
16.3
16.8
17.3
17.9
18.4
18.9
19.4
19.9
20.4
20.9
21.4
21.9
22.5
23.0
IBS Framing: add 0.2 dB
0.0
0.9
1.8
2.6
3.3
4.1
4.7
5.4
6.0
6.6
7.3
7.8
8.4
9.0
9.5
10.1
10.6
11.2
11.7
12.2
12.8
13.3
13.8
14.3
14.9
15.4
15.9
16.4
16.9
17.4
17.9
18.4
18.9
19.5
20.0
0.8
1.5
2.1
2.7
3.2
3.7
4.2
4.6
5.0
5.9
6.8
7.6
8.4
9.1
9.8
10.4
11.1
11.7
12.3
12.9
13.4
14.0
14.6
15.1
15.7
16.2
16.7
17.3
17.8
18.3
18.8
19.4
19.9
20.4
20.9
21.4
21.9
22.4
23.0
23.5
24.0
24.5
25.0
1.1
1.7
2.4
3.0
3.6
4.3
4.8
5.4
6.0
6.5
7.1
7.6
8.2
8.7
9.2
9.8
10.3
10.8
11.3
11.9
12.4
12.9
13.4
13.9
14.4
14.9
15.4
15.9
16.5
17.0
-
0.9
1.8
2.6
3.3
4.1
4.7
5.4
6.0
6.6
7.3
7.8
8.4
9.0
9.5
10.1
10.6
11.2
11.7
12.2
12.8
13.3
13.8
14.3
14.9
15.4
15.9
16.4
16.9
17.4
17.9
18.4
18.9
19.5
20.0
0.8
1.5
2.3
2.9
3.6
4.2
4.8
5.5
6.0
6.6
7.2
7.7
8.3
8.8
9.4
9.9
10.4
11.0
11.5
12.0
12.5
13.1
13.6
14.1
14.6
15.1
15.6
16.1
16.6
17.1
17.7
18.2
Eb/No
Rate 3/4
QPSK
0.9
1.7
2.3
3.0
3.6
4.2
4.9
5.4
6.0
6.6
7.1
7.7
8.2
8.8
9.3
9.8
10.4
10.9
11.4
11.9
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.1
17.6
1.3
1.9
2.6
3.2
3.8
4.5
5.0
5.6
6.2
6.7
7.3
7.8
8.4
8.9
9.4
10.0
10.5
11.0
11.5
12.1
12.6
13.1
13.6
14.1
14.6
15.1
15.6
16.1
16.7
17.2
4.9
5.5
6.0
6.6
7.1
7.7
8.2
8.7
9.3
9.8
10.3
10.8
11.4
11.9
12.4
12.9
13.4
13.9
14.4
14.9
15.4
16.0
16.5
Eb/No
Rate 3/4
8-PSK
4.8
5.3
5.9
6.4
7.0
7.5
8.0
8.6
9.1
9.6
10.1
10.7
11.2
11.7
12.2
12.7
13.2
13.7
14.2
14.7
15.3
15.8
4.5
5.0
5.6
6.1
6.7
7.2
7.7
8.3
8.8
9.3
9.8
10.4
10.9
11.4
11.9
12.4
12.9
13.4
13.9
14.4
15.0
15.5
5.3
5.8
6.4
6.9
7.4
8.0
8.5
9.0
9.5
10.1
10.6
11.1
11.6
12.1
12.6
13.1
13.6
14.1
14.7
15.2
Eb/No
Eb/No
Eb/No
Rate 7/8 Rate 0.95 Rate 3/4
16-QAM
8-PSK
8-PSK
5.2
5.8
6.3
6.8
7.4
7.9
8.4
8.9
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.1
14.6
Eb/No
Rate 7/8
16-QAM
Reed-Solomon: add an additional 0.4 dB to the values shown
4.8
5.4
6.0
6.5
7.1
7.6
8.2
8.7
9.2
9.8
10.3
10.8
11.3
11.9
12.4
12.9
13.4
13.9
14.4
14.9
15.4
15.9
16.5
17.0
Eb/No
Eb/No
Eb/No
Rate 7/8 Rate 0.95 Rate 2/3
8-PSK
QPSK
QPSK
EDMAC Framing: rates below 2048 kbps add 0.2 dB, otherwise 0
0.9
1.4
1.9
2.3
2.8
3.2
4.1
5.0
5.8
6.5
7.3
7.9
8.6
9.2
9.8
10.5
11.0
11.6
12.2
12.7
13.3
13.8
14.4
14.9
15.4
16.0
16.5
17.0
17.5
18.1
18.6
19.1
19.6
20.1
20.6
21.1
21.6
22.1
22.7
23.2
Eb/No
Eb/No
Eb/No
Eb/No
Eb/No
Eb/No
(Co+No)
Uncoded Rate 1/2 Rate 21/44 Rate 5/16 Uncoded Rate 1/2
/No
QPSK
QPSK
BPSK
BPSK
BPSK
BPSK
CDM-625 Advanced Satellite Modem
Appendix B
Revision 15
MN-CDM625
CDM-625 Advanced Satellite Modem
Appendix B
Revision 15
MN-CDM625
Notes:
B–4
Appendix C. FAST ACTIVATION
PROCEDURE
C.1
FAST System Overview
The CDM-625 Advanced Satellite Modem incorporates a number of optional features. In order
to permit a lower initial cost, you may purchase the unit enabled with only the desired features.
If you wish to upgrade the functionality of a unit at a later date, Comtech EF Data provides Fully
Accessible System Topology (FAST), which permits the purchase and activation of options
through special authorization codes. You may purchase these unique, register-specific Fast
Access Codes from Comtech EF Data during normal business hours, and then load these codes
into the unit using either the front panel keypad or the CDM-625 Web Server (HTTP) Interface.
Contact Comtech EF Data Product Support to order the desired options.
See Table 1-2 in Chapter 1. INTRODUCTION or Sect. 5.2.8.1.1 in Chapter 5. FRONT
PANEL OPERATION for listings of the available FAST and FAST-accessible hardware
options.
FAST System Theory: FAST facilitates on-location upgrade of the operating feature set without
removing a unit from the setup. FAST technology allows you to order a unit precisely tailored for
the initial application. When your service requirements change, you can upgrade the topology of
the unit to meet these requirements within minutes. This accelerated upgrade can be
accomplished because of FAST’s extensive use of the programmable logic devices incorporated
into Comtech EF Data products.
FAST Implementation: Comtech EF Data’s FAST system is factory-implemented in the modem.
All FAST options are available through the basic platform unit at the time of order – FAST allows
immediate activation of available options, after confirmation by Comtech EF Data, through the
CDM-625 Web Server (HTTP) Interface.
FAST Accessible Options: Hardware options can be ordered and installed either at the factory or
in the field. Depending on the current hardware configuration of the unit, you can select options
that can be easily activated on-site. The FAST Access Code that is purchased from Comtech EF
Data enables configuration of the available hardware. The base CDM-625 unit is equipped with
Viterbi and Reed-Solomon codecs. It offers BPSK, QPSK, and OQPSK modulation types, and data
rates up to 5.0 Mbps, with all interface types. While it is limited to Closed Network operation, it
also includes EDMAC and AUPC.
C–1
CDM-625 Advanced Satellite Modem
Appendix C
C.2
C.2.1
Revision 15
MN-CDM625
FAST Activation Procedure
FAST Activation via the CDM-625 Front Panel
Chapter 5. FRONT PANEL OPERATION provides complete information about using
this interface.
Step
1
2
3
Task
Before contacting Comtech EF Data to order FAST feature upgrades, obtain and record the modem’s
motherboard serial number:
a)
From the front panel main menu, SELECT: FAST, and then press [ENTER].
b)
The modem’s 9-digit “Baseboard S/N” is displayed on the bottom line, to the left.
c)
Record Serial Number: ______________________________________
View the currently installed features. Proceed as follows:
a)
From the front panel main menu, SELECT: FAST, then press [ENTER].
b)
From the SELECT: FAST  OPTIONS menu, select View Options, then press [ENTER].
c)
Use the up and down arrow keys (▲▼) to scroll through the list of available FAST options.
Options are identified as ‘Installed’ or ‘Not Installed’. Any that are ‘Not Installed’ may be
purchased as a FAST upgrade.
Contact a Comtech EF Data sales representative during normal business hours to order features:
•
Provide the unit Serial Number to the representative.
•
Identify and purchase the desired FAST option(s).
•
Obtain the invoice, the register-specific 20-digit FAST Access Code(s), and the FAST option
activation instructions.
When a FAST access code is obtained from Comtech EF Data, it will be for
a specific option register. The FAST options are linked to three option
registers:
•
Register 1 is for Data Rate options.
•
Register 2 is for L-Band, Modulation type and Framing options.
•
Register 3 is the Fractional CnC option.
C–2
CDM-625 Advanced Satellite Modem
Appendix C
Step
4
Revision 15
MN-CDM625
Task
Enter the FAST access code(s):
a)
Press [CLEAR] to return to the SELECT: FAST  Options  Set Registers menu.
b)
Use the arrow keys (▲▼◄ ►) to carefully enter each register-specific 20-character FAST
access code.
c)
Press [ENTER].
For Firmware Ver. 1.5.1 or earlier, enter the FAST access code for option
register(s) #1, #2 and/or #3 as required. For Firmware Ver. 1.5.2 and later, all
three FAST access codes must be entered in sequence in order for the purchased
option upgrades to be properly activated.
The modem responds with “Configured Successfully” if the FAST upgrade is accepted; the modem
then resets to its newly-incorporated default configuration.
However, if an invalid code is entered, the following message displays:
Failed to configure. Re-enter code.
88888888888888888888 then [ENTER]()
Repeat the FAST access code entry procedure. Should the code entry error persist, contact Comtech EF
Data Product Support for further assistance.
C–3
CDM-625 Advanced Satellite Modem
Appendix C
C.2.2
Revision 15
MN-CDM625
FAST Activation via the CDM-625 Web Server (HTTP) Interface
Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT provides complete
information about using this interface.
Figure C-1. CDM-625 Web Server (HTTP) Interface – ‘ADMIN | FAST’ page
Use the CDM-625 Web Server (HTTP) Interface ‘Admin | FAST’ page (Figure C-1) for complete
management of FAST Features. This page provides scrollable list boxes that display the
availability and activation status for all FAST options. FAST code entry/option activation control
is also provided.
Step
1
Task
Before contacting Comtech EF Data to order FAST feature upgrades, use the front panel SELECT:
FAST menu, as explained in Sect. C.2.1 Step 1, to obtain and record the modem’s motherboard serial
number.
Record Serial Number: ______________________________________
2
Use the ‘Admin | FAST’ page to view the currently installed features. Any options that appear in the
scrollable Options – Not Installed list box may be purchased as a FAST upgrade.
C–4
CDM-625 Advanced Satellite Modem
Appendix C
Step
3
Revision 15
MN-CDM625
Task
Contact a Comtech EF Data sales representative during normal business hours to order features:
•
Provide the unit Serial Number to the representative.
•
Identify and purchase the desired FAST option(s).
•
Obtain the invoice, the register-specific 20-digit FAST Access Code(s), and the FAST option
activation instructions.
When a FAST access code is obtained from Comtech EF Data, it will be for
a specific option register. The FAST options are linked to three option
registers:
4
•
Register 1 is for Data Rate options.
•
Register 2 is for L-Band, Modulation type and Framing options.
•
Register 3 is the Fractional CnC option.
Enter the FAST access code(s):
a)
In the ‘Admin | FAST’ page FAST code section, carefully enter each register-specific 20character FAST access code in sequence.
b)
Click [Submit FAST code].
With Firmware Ver. 2.1.0 and later, all three FAST access codes must be
entered in sequence in order for the purchased option upgrades to be
properly activated.
The message “Configured Successfully” appears at the top of the FAST code section if the FAST
upgrade is accepted; the modem then resets to its newly-incorporated default configuration.
However, if an invalid code is entered, either of the following messages may appear instead:
Repeat the FAST access code entry procedure. Should the code entry error persist, contact Comtech
EF Data Product Support for further assistance.
C–5
CDM-625 Advanced Satellite Modem
Appendix C
Revision 15
MN-CDM625
Notes:
C–6
Appendix D. REMOTE CONTROL
D.1
Overview
The CDM-625 Advanced Satellite Modem serial remote product management interface is an electrical interface that is either an EIA-485
multi-drop bus (for the control of multiple devices) or an EIA-232 connection (for the control of a single device). The interface transmits
data in asynchronous serial form, using ASCII characters. This data consists of control and status information, transmitted in packets of
variable length in accordance with the structure and protocol explained later in this appendix.
D.2
EIA-485
For applications where multiple devices are to be monitored and controlled, a full-duplex (or 4-wire plus ground) EIA-485 is preferred.
Half-duplex (2-wire plus ground) EIA-485 is possible, but is not preferred. In full-duplex EIA-485 communication, there are two separate,
isolated, independent, differential-mode twisted pairs, each handling serial data in different directions.
It is assumed that a 'Controller' device (a PC or dumb terminal) transmits data in a broadcast mode via one of the pairs. Multiple 'Target'
devices are connected to this pair, and all simultaneously receive data from the Controller. The Controller is the only device with a linedriver connected to this pair – the Target devices have only line-receivers connected.
In the other direction, on the other pair each Target has a tri-state line driver connected, and the Controller has a line-receiver
connected. All the line drivers are held in high-impedance mode until one (and only one) Target transmits back to the Controller. Each
Target has a unique address, and each time the Controller transmits, the address of the intended recipient Target is included in a framed
'packet' of data. All of the Targets receive the packet, but only one (the intended) will reply. The Target enables its output line driver and
transmits its return data packet back to the Controller in the other direction, on the physically separate pair.
D–1
CDM-625 Advanced Satellite Modem
Appendix D
Revision 15
MN-CDM625
EIA-485 (full duplex) summary:
D.3
•
Two differential pairs – one pair for Controller-to-Target, one pair for Target-to-Controller.
•
Controller-to-Target pair has one line driver (Controller), and all Targets have line-receivers.
•
Target-to-Controller pair has one line receiver (Controller), and all Targets have Tri-State drivers.
EIA-232
This is a much simpler configuration in which the Controller device is connected directly to the Target via a two-wire-plus-ground
connection. Controller-to-Target data is carried, via EIA-232 electrical levels on one conductor, and Target-to-Controller data is carried in
the other direction on the other conductor.
D.4
Basic Protocol
Whether in EIA-232 or EIA-485 mode, all data is transmitted as asynchronous serial characters, suitable for transmission and reception
by a Universal Asynchronous Receiver/Transmitter (UART). The asynchronous character format is 8-N-1 (8 data bits, no parity, 1 stop bit).
The baud rate may vary from 1200 to 38400 baud.
All data is transmitted in framed packets. The Controller is in charge of the process of monitor and control, and is the only device that is
permitted to initiate, at will, the transmission of data. Targets are only permitted to transmit when they have been specifically instructed
to do so by the Controller.
All bytes within a packet are printable ASCII characters, less than ASCII code 127. In this context, the Carriage Return and Line Feed
characters are considered printable.
All messages from Controller-to-Target require a response, with one exception: This will be either to return data that has been
requested by the Controller, or to acknowledge reception of an instruction to change the configuration of the Target. The exception to
this is when the Controller broadcasts a message (such as Set Time/Date) using Address 0, when the Target is set to EIA-485 mode.
D–2
CDM-625 Advanced Satellite Modem
Appendix D
D.4.1
Revision 15
MN-CDM625
Packet Structure
The exchange of information is transmitted, Controller-to-Target and Target-to-Controller, in ‘packets’. Each packet contains a finite
number of bytes consisting of printable ASCII characters, excluding ASCII code 127 (DELETE).
In this context, the Carriage Return and Line Feed characters are considered printable. With one exception, all messages from Controllerto-Target require a response – this will be either to return data that has been requested by the Controller, or to acknowledge reception of an
instruction to change the configuration of the Target.
Controller-to-Target
Start of Packet
Target Address
<
ASCII code 60
(1 character)
Address Delimiter
Instruction Code
/
ASCII code 47
(4 characters)
(1 character)
Code Qualifier
Optional Arguments
= or ?
ASCII codes 61 or 63
(3 characters)
End of Packet
Carriage Return
ASCII code 13
(1 character)
(n characters)
Code Qualifier
Optional Arguments
(1 character)
Example: <0135/TFQ=70.2345{CR}
Target-to-Controller
Start of Packet
Target Address
>
ASCII code 62
(1 character)
Address Delimiter
Instruction Code
/
ASCII code 47
(4 characters)
(1 character)
=, ?, !, or *
ASCII codes
61, 63, 33, or 42
(3 characters)
(1 character)
End of Packet
Carriage Return, Line
Feed
ASCII codes 13,10
(From 0 to n characters)
(2 characters)
Example: >0654/RSW=32{CR}{LF}
D.4.1.1 Start of Packet
•
Controller-to-Target: This is the character ‘<’ (ASCII code 60).
•
Target-to-Controller: This is the character ‘>’ (ASCII code 62).
The ‘<’ and ‘>’ characters indicate the start of packet. They may not appear anywhere else within the body of the message.
D–3
CDM-625 Advanced Satellite Modem
Appendix D
Revision 15
MN-CDM625
D.4.1.2 Target Address
Up to 9999 devices can be uniquely addressed. In EIA-232 applications this value is set to 0. In EIA-485 applications, the permissible
range of values is 1 to 9999. It is programmed into a Target unit using the front panel keypad.
The Controller sends a packet with the address of a Target – the destination of the packet. When the Target responds, the
address used is the same address, to indicate to the Controller the source of the packet. The Controller does not have its
own address.
D.4.1.3 Address Delimiter
This is the “forward slash” character '/' (ASCII code 47).
D.4.1.4 Instruction Code
This is a three-character alphabetic sequence, which identifies the subject of the message. Wherever possible, the instruction codes have
been chosen to have some significance – e.g., TFQ for transmit frequency, RMD for receive modulation type, etc. This aids in the readability
of the message, should it be displayed in its raw ASCII form. Only upper case alphabetic characters may be used (A-Z, ASCII codes 65 - 90).
D.4.1.5 Instruction Code Qualifier
This is a single character, which further qualifies the preceding instruction code. Code Qualifiers obey the following rules:
1. From Controller-to-Target, the only permitted values are:
Symbol
Explanation
=
(ASCII code 61)
The ‘=’ code is used as the Assignment Operator (AO) and is used to indicate that the parameter defined by the preceding byte should
be set to the value of the argument (s) which follow it.
Example: In a message from Controller-to-Target, TFQ=0950.0000 would mean “set the transmit frequency to 950 MHz.”
?
(ASCII code 63)
The ‘?’ code is used as the Query Operator (QO) and is used to indicate that the Target should return the current value of the
parameters defined by the preceding byte.
Example: In a message from Controller-to-Target, TFQ? Would mean “return the current value of the transmit frequency.”
D–4
CDM-625 Advanced Satellite Modem
Appendix D
Revision 15
MN-CDM625
2. From Target-to-Controller, the only permitted values are:
Symbol
Explanation
=
(ASCII code 61)
The ‘=’ code is used in two ways:
a. If the Controller has sent a query code to a Target.
Example: TFQ? (meaning ‘what’s the Transmit frequency?’), the Target would respond with TFQ=xxxx.xxxx, where xxxx.xxxx
represents the frequency in question.
b. If the Controller sends an instruction to set a parameter to a particular value, then, providing the value sent is valid, the Target will
acknowledge the message by replying with TFQ= (with no message arguments).
?
(ASCII code 63)
If the Controller sends an instruction to set a parameter to a particular value, then, if the value sent is not valid, the Target will
acknowledge the message by replying (for example) with TFQ? (with no message arguments). This indicates that there was an error in
the message sent by the Controller.
!
(ASCII code 33)
If the Controller sends an instruction code which the Target does not recognize, the Target will acknowledge the message by echoing
the invalid instruction, followed by the ! character.
Example: XYZ!
*
(ASCII code 42)
If the Controller sends an instruction to set a parameter to a particular value, then, if the value sent is valid BUT the modulator will not
permit that particular parameter to be changed at this time, the Target will acknowledge the message by replying, for example, with
TFQ* (with message arguments).
#
(ASCI code 35)
If the Controller sends a correctly formatted command BUT the modem is in local mode, it will not allow reconfiguration and will
respond with TFQ#
~
(ASCI code 126)
If a message was sent via a local modem to a distant end device or ODU, the message was transmitted transparently through the
local modem. In the event of the distant-end device not responding, the local modem would generate a response.
Example: 0001/RET~ (indicating that it had finished waiting for a response and was now ready for further comms).
^
(ASCI code 94)
If the Controller sends a correctly formatted command BUT the modem is in Ethernet Remote mode, it will not allow reconfiguration,
and will respond with TFQ^.
D–5
CDM-625 Advanced Satellite Modem
Appendix D
Revision 15
MN-CDM625
D.4.1.6 Optional Message Arguments
Arguments are not required for all messages. Arguments are ASCII codes for the characters 0 to 9 (ASCII codes 48 to 57), period (ASCII code
46) and comma (ASCII code 44).
D.4.1.7 End Of Packet
•
Controller-to-Target: This is the ‘Carriage Return’ character (ASCII code 13).
•
Target-to-Controller: This is the two-character sequence ‘Carriage Return’, ‘Line Feed’ (ASCII codes 13 and 10). Both indicate the
valid termination of a packet.
D–6
CDM-625 Advanced Satellite Modem
Appendix D
Revision 15
MN-CDM625
D.5
Remote Commands and Queries
D.5.1
Table Indexes
Notes:
1. Index Columns – Where Column ‘C’ = Command, and Column ‘Q’ = Query, columns marked ‘X’ designate the instruction code as
Command only, Query only, or Command or Query. Where CODE = XXX, this indicates a priority command.
2. In the tables that follow, the following codes are used in the ‘Response to Command’ column (per Sect. D.5.5):
= Message ok
# Message ok, but unit is not in Remote mode.
? Received ok, but invalid arguments were found.
^ Message ok, but unit is in Ethernet mode.
~ Time out of a pass-through message, either to via EDMAC or to a local ODU
Sect. D.5.2 Tx Parameters
CODE
APP
AUP
DTS
DTY
C
X
X
X
X
Q
X
X
X
X
PAGE
D-16
D-15
D-17
D-17
PLI
X
D-16
REB
X
D-16
CODE
TBA
TCI
TCK
TCR
TDI
TDR
TET
TFM
C
X
X
X
X
X
X
X
X
Q
X
X
X
X
X
X
X
X
PAGE
D-17
D-17
D-16
D-12
D-14
D-13
D-18
D-10
CODE
TFQ
TFT
TIR
TIT
TLO
TMD
TMI
TMR
C
X
X
CODE
RCI
RCK
RCR
RDI
RDR
RDS
REE
RET
C
X
X
X
X
X
X
X
X
Q
X
X
X
X5
X
X
X
X
PAGE
D-24
D-24
D-21
D-23
D-22
D-23
D-26
D-25
CODE
RFM
RFQ
RFT
RIR
RIT
RLO
RMD
RMI
C
X
X
X
X
X
X
X
Q
X
X
X
X
X
X
X
X
PAGE
D-13
D-11
D-18
D-10
D-18
D-11
D-18
D-13
CODE
TMX
TPL
TRS
TSC
TSI
TSR
TTA
TTC
C
X
X
X
X
X
X
X
X
Q
X
X
X
X
X
X
X
X
PAGE
D-13
D-14
D-14
D-14
D-14
D-13
D-17
D-17
CODE
TTF
TVL
TXA
TXO
C
Q
X
X
X
X
X
X
X
X
PAGE
D-19
D-22
D-20
D-26
D-19
D-25
D-20
D-26
CODE
RMR
RMX
RRS
RSI
RSL
RSN
RSR
RSW
C
X
X
X
X
Q
X
X
X
X
X
X
X
X
PAGE
D-22
D-22
D-23
D-23
D-46
D-52
D-22
D-23
CODE
RTC
RTE
RTF
RVL
C
X
X
X
X
X
Q
X
X
X
X
PAGE
D-18
D-17
D-15
D-15
Q
X
X
X
X
PAGE
D-25
D-24
D-25
D-24
Sect. D.5.3 Rx Parameters
CODE
EBA
ITS
ITY
RBA
RBS
RCB
C
X
X
X
X
X
X
Q
X
X
X
X
X
PAGE
D-24
D-25
D-24
D-25
D-24
D-25
D–7
X
X
X
X
X
X
CDM-625 Advanced Satellite Modem
Appendix D
Revision 15
MN-CDM625
Sect. D.5.4 Unit Parameters
CODE
ABA
ACM
ADJ
AHD
AHM
AHO
ALA
BKE
BRE
BRM
BRR
BRX
BTX
CAE
C
X
X
X
X
X
X
X
X
X
X
X
X
Q
X
X
X
X
X
X
X
X
X
X
X
X
PAGE
D-30
D-38
D-29
D-39
D-39
D-39
D-30
D-38
D-38
D-38
D-38
D-37
D-37
D-31
CODE
CAI
CAS
CCF
CEX
CID
CNM
CPM
CSD
CST
CTD
DAY
DMM
DMT
EFM
C
X
X
X
X
X
X
X
X
X
X
X
X
X
Q
X
X
X
X
X
X
X
X
X
X
X
X
PAGE
D-38
D-33
D-36
D-36
D-27
D-35
D-36
D-36
D-41
D-30
D-27
D-39
D-39
D-28
CODE
EFR
EMU
ESA
ESC
FPL
FRB
FSW
HHC
IEP
IMG
IPA
IPG
IPT
ISP
C
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Q
X
X
X
X
X
X
X
X
X
X
X
PAGE
D-29
D-27
D-28
D-28
D-27
D-38
D-33
D-35
D-32
D-27
D-34
D-34
D-34
D-33
CODE
LRS
MAC
MEO
MRC
MSK
NUE
NUS
ODU
OFN
OTO
PCO
RBP
RNE
RNN
C
X
X
X
X
X
X
X
X
X
Q
X
X
X
X
X
X
X
X
X
X
X
X
X
X
PAGE
D-27
D-34
D-39
D-27
D-30
D-31
D-32
D-33
D-34
D-28
D-35
D-37
D--31
D-33
CODE
RNS
RTS
SCP
SSI
C
X
X
X
Q
X
X
X
X
PAGE
D-32
D-35
D-29
D-31
TBP
TIM
TPB
TPE
TPS
TST
X
X
X
X
X
X
X
X
X
X
X
X
D-37
D-28
D-40
D-39
D-40
D-30
WRM
X
X
D-29
Sect. D.5.5 Bulk Configuration Strings
CODE
BSQ
C
Q
X
PAGE
D-46
CODE
CLD
CST
C
X
X
Q
PAGE
D-45
D-45
CODE
DIC
DNI
C
X
X
Q
X
X
PAGE
D-44
D-44
CODE
MGC
OGC
C
X
X
Q
X
X
PAGE
D-41
D-43
CODE
QDI
C
X
Q
X
PAGE
D-45
C
Q
X
X
PAGE
D-47
D-47
CODE
HRV
C
Q
X
PAGE
D-47
CODE
SNO
C
Q
X
PAGE
D-47
CODE
SW2
SWR
C
Q
X
X
PAGE
D-47
D-47
CODE
EBN
C
Q
X
PAGE
D-50
C
Q
X
PAGE
D-56
D-51
X
X
D-50
OUS
D-51
PAGE
D-56
D-50
D-50
D-50
D-56
C
X
Q
X
X
X
X
X
CODE
SNR
FLT
CODE
RBE
RED
RFO
RSL
RSN
PSD
X
D-54
Sect. D.5.6 Modem Information
CODE
EID
FCC
C
Q
X
X
PAGE
D-48
D-47
CODE
FCF
FRW
Sect. D.5.7 Modem Performance Information
CODE
ABE
ABR
AFE
AFR
AHS
APC
APL
C
X
X
X
X
X
Q
X
X
X
X
PAGE
D-54
D-54
D-54
D-54
D-56
D-54
D-55
CODE
APS
BER
BFS
CDM
CFM
CPR
CRM
C
Q
X
X
X
X
X
X
X
PAGE
D-55
D-50
D-50
D-53
D-53
D-53
D-53
D–8
TMP
CDM-625 Advanced Satellite Modem
Appendix D
Revision 15
MN-CDM625
Sect. D.5.8 BUC Parameters (L-Band Device)
CODE
BAD
BCH
BCL
C
X
X
X
Q
X
X
X
PAGE
D-57
D-57
D-57
CODE
BDC
BDV
BFR
C
X
Q
X
X
X
PAGE
D-57
D-57
D-57
CODE
BOE
BOL
BPA
BPC
C
X
Q
X
X
X
X
PAGE
D-57
D-57
D-58
D-58
CODE
BPS
BSV
BUT
C
X
Q
X
X
X
PAGE
D-57
D-58
D-58
CODE
C
Q
PAGE
Sect. D.5.9 LNB Parameters (L-Band Device)
CODE
LNC
LNH
C
X
Q
X
X
PAGE
D-59
D-59
CODE
LNL
LNR
C
X
X
Q
X
X
PAGE
D-59
D-59
CODE
LPS
LVO
C
X
Q
X
X
PAGE
D-59
D-59
CODE
C
Q
PAGE
CODE
C
Q
PAGE
CODE
NPS
C
Q
X
PAGE
D-60
CODE
QOS
C
X
Q
X
PAGE
D-62
X
X
X
X
D-62
D-64
D-64
D-64
SEC
SML
SMV
SPC
SVA
X
X
X
X
X
X
X
X
X
X
D-60
D-61
D-61
D-62
D-61
PAGE
D-62
D-63
D-61
D-61
CODE
VS0
VS1
VS2
C
X
X
X
X
C
X
X
X
X
Q
PPE
PRD
PTM
PTP
CODE
SVD
SVE
SVM
SVT
Q
X
X
X
PAGE
D-64
D-64
D-64
X
X
X
D-60
D-60
D-63
Sect. D.5.10 Ethernet Parameters
CODE
ACL
AFI
C
X
Q
X
X
PAGE
D-64
D-63
DMP
X
X
D-63
EFS
EGC
X
X
X
X
D-63
D-61
D–9
X
X
WBF
WBL
WMD
X
X
CDM-625 Advanced Satellite Modem
Appendix D
D.5.2
Revision 15
MN-CDM625
Tx Parameters
Priority System: TIT (Highest priority) , TFM, TFT, TMD, TCR, TDR, and TSR (Lowest Priority), indicated by shading. Any change to a higher
priority parameter can override any of the parameters of lower priority.
Exception – Select DROP, D&I++, QDI or Framed QDI mode using TFM (Transmit Framing type), which is highest priority.
Parameter
Type
Command
(Instruction
& Qualifier)
Tx Interface
Type
TIT=
Tx Framing
Mode
TFM=
Number of
Arguments
1 byte, value
of 0 thru 9, or
A
1 byte, value
of 0 thru 9, A
Description of Arguments
Command or Query.
Tx Interface Type, where:
0=RS422
1=V.35
2= reserved – do not use.
3=Balanced G.703
4=Unbalanced G.703
5=Audio (Data rate fixed at 64 kbps) (IBS/EDMAC only)
6=LVDS
7=HSSI
8=IP
9=ASI
A=IP-ACM (Unframed, EDMACs only)
Example: TIT=1 (selects V.35)
Command or Query.
Tx Framing mode, where:
0=Unframed
1=IBS
2=IDR
3=D&I - DROP (requires D&I FAST option)
4=EDMAC
5=D&I++ (requires D&I FAST option)
6=ESC++
7=EDMAC-2
8=Quad Drop & Insert (requires QDI FAST option)
(G.703 Balanced, E1-CCS only)
9=Framed QDI (requires QDI FAST option)
(G.703 Balanced, E1-CCS only)
A=EDMAC-3
Example: TFM=0 (selects Unframed mode)
D–10
Response to
Command
Query
(Instruction &
Qualifier)
TIT=
TIT?
TIT*
TIT#
TIT?
TFM=
TFM?
TFM*
TFM#
TFM?
Response to
Query
TIT=x
(see Description of
Arguments)
TFM=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Tx FEC Type
Tx
Modulation
Type
Command
(Instruction
& Qualifier)
TFT=
TMD=
Number of
Arguments
1 byte, value
of 0 thru 9, A,
B
1 byte, value
of 0 thru 5
Revision 15
MN-CDM625
Description of Arguments
Command or Query.
Tx FEC coding type, where:
0=None (uncoded) with differential encoding ON
1=Viterbi
2=Viterbi + Reed-Solomon
3=Sequential
4=Sequential + Reed-Solomon
5=TCM (Trellis Code Modulation)
(Forces Rate 2/3)
6=TCM + Reed-Solomon (Forces Rate 2/3)
7=TPC (aka Turbo) (requires TPC/LDPC Codec)
8=None (uncoded) with differential encoding OFF
9=LDPC (Requires TPC/LDPC Codec)
A=VersaFEC CCM or ACM (fixed in IP-ACM)
B=VersaFEC ULL
Example: TFT=1 (selects Viterbi coding)
Command or Query (Query only in IP-ACM).
Tx Modulation type in the form x, where:
0=BPSK
1=QPSK
2=OQPSK
3=8-PSK
4=16-QAM (Turbo or Viterbi + RS only)
5=8-QAM (TPC/LDPC only) (Need Codec & FAST option)
6=Reserved
7=Reserved
8=Reserved
Depending on FEC type, not all of these selections will be valid.
Example: TMD=2 (selects OQPSK)
D–11
Response to
Command
Query
(Instruction &
Qualifier)
TFT=
TFT?
TFT*
TFT#
TFT?
TMD=
TMD?
TMD*
TMD#
TMD?
Response to
Query
TFT=x
(see Description of
Arguments)
TMD=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Command
(Instruction
& Qualifier)
Tx FEC Code TCR=
Rate
Number of
Arguments
1 byte, value
of 0 thru 7, A
to U
Revision 15
MN-CDM625
Description of Arguments
Command or Query (Query only in IP-ACM).
Tx FEC Code Rate in the form x, where:
0=Rate 1/2
1=Rate 3/4
2=Rate 7/8
3=Rate 2/3 (8-PSK TCM or LDPC only)
4=Rate 1/1 (Uncoded or No FEC)
5=Rate 21/44 (Turbo Only)
6=Rate 5/16 (Turbo Only)
7=Rate 0.95 (Turbo Only) (aka 17/18)
8=Reserved
9=Reserved
A=VersaFEC CCM ModCod 0 – BPSK 0.488
B=VersaFEC CCM ModCod 1 – QPSK 0.533
C=VersaFEC CCM ModCod 2 – QPSK 0.631
D=VersaFEC CCM ModCod 3 – QPSK 0.706
E=VersaFEC CCM ModCod 4 – QPSK 0.803
F=VersaFEC CCM ModCod 5 – 8-QAM 0.642
G=VersaFEC CCM ModCod 6 – 8-QAM 0.711
H=VersaFEC CCM ModCod 7 – 8-QAM 0.780
I=VersaFEC CCM ModCod 8 – 16-QAM 0.731
J=VersaFEC CCM ModCod 9 – 16-QAM 0.780
K=VersaFEC CCM ModCod 10 – 16-QAM 0.829
L=VersaFEC CCM ModCod 11 – 16-QAM 0.853
M=Reserved
N=Reserved
O=VersaFEC CCM ModCod 14 – 8-QAM 0.576
P=VersaFEC CCM ModCod 15 – 16-QAM 0.644
Q=Reserved
R=VersaFEC CCM ULL ModCod 17 – BPSK 0.493
S=VersaFEC CCM ULL ModCod 18 – QPSK 0.493
T=VersaFEC CCM ULL ModCod 19 – QPSK 0.654
U=VersaFEC CCM ULL ModCod 20 – QPSK 0.734
Depending on FEC type, not all of these selections will be valid.
Example: TCR=1 (selects Rate 3/4)
D–12
Response to
Command
TCR=
TCR?
TCR*
TCR#
Query
(Instruction &
Qualifier)
TCR?
Response to
Query
TCR=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Tx Data Rate
Tx
Symbol Rate
Command
(Instruction
& Qualifier)
TDR=
TSR=
Tx Frequency TFQ=
Number of
Arguments
9 bytes
9 bytes,
numeric
9 bytes
Exception –
600 Emulation
8 bytes
Tx Sub-Mux
on/off
TMX=
Tx Sub-Mux
Ratio
TMR=
1 byte, 0 or 1
2 bytes,
numeric
Revision 15
MN-CDM625
Response to
Command
Description of Arguments
Command or Query (Query only in IP-ACM).
Tx Data rate, in kbps, between 18 kbps and 25 Mbps Resolution=1 bps
Example: TDR=02047.999 (selects 2047.999 kbps)
Additional auxiliary G.703 sub-rates are available, selected using:
00512.AUX
01024.AUX
02048.AUX
The connectors used for the Aux rates are IDI/DDO.
These Aux rates are not available with Drop & Insert or IDR.
Read-only if Framing Mode is Quad Drop & Insert (TFM=8). Data rate is set by assigning the number of
channels on each port.
Read-only if Modulation Type is a ‘Reserved’ type
Query only (Command or Query in IP-ACM).
Allows remote access to the Tx symbol rate, in the form ddddd.ddd
Note: Symbol Rate ranges in IP-ACM = 37 ksym/sec to 4100 ksym/sec
Command or Query.
Frequency ranges:
50 MHz to 180 MHz, and
950 MHz to 1950 MHz (L-Band – FAST option)
Resolution=100Hz.
Note: The CDM-625 supports 70,140 MHz bands and L-Band.
Example: TFQ=0950.9872
Command or Query.
Tx Sub-Mux in the form x, where:
0=Off
1=On
Command or Query.
Tx Sub-Mux Ratio (IP/Synchronous Interface) in the form xx, where
00=1/9
08=2/5
16=5/4
01=1/8
09=3/7
17=4/3
02=1/7
10=1/2
18=3/2
03=1/6
11=3/5
19=5/3
04=1/5
12=2/3
20=2/1
05=1/4
13=3/4
21=7/3
06=2/7
14=4/5
22=5/2
07=1/3
15=1/1
23=3/1
Example: TMR=01 (Selects ratio 1/8)
D–13
24=7/2
25=4/1
26=5/1
27=6/1
28=7/1
29=8/1
30=9/1
31=1/59 32=1/39 33=1/19
Query
(Instruction &
Qualifier)
Response to
Query
TDR=
TDR?
TDR*
TDR#
TDR?
TDR=xxxxx.xxx
TSR?
TSR=
TSR*
TSR#
TFQ=
TFQ?
TFQ*
TFQ#
TSR?
TSR=ddddd.ddd
TFQ?
(see Description of
Arguments)
TFQ=xxxx.xxxx
TMX?
TMX=
TMX*
TMX#
TMR?
TMR=
TMR*
TMR#
TMX?
TMX=x
TMR?
(see Description of
Arguments)
TMR=xx
(see Description of
Arguments)
Exception –
600 Emulation:
TFQ=xxx.xxxx
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Tx
Data Invert
Command
(Instruction
& Qualifier)
TDI=
1 byte, 0 or 1
Exception –
600/L
Emulation:
ITD=
Tx
ReedSolomon
Encoding
TRS=
Tx Spectrum
Invert
TSI=
Tx Scrambler
TSC=
Tx Power
Level
Number of
Arguments
TPL=
1 byte, value
of 0 thru 3
1 byte, 0 or 1
1 byte, 0, 1 or
2
4 bytes
Revision 15
MN-CDM625
Description of Arguments
Command or Query.
Invert Transmit Data
0=Normal
1=Inverted
Example: TDI = 1 (selects TX Data Invert)
Exception – In 600/L Emulation Mode, instruction is ITD.
Command or Query.
Tx RS encoding
0=Normal (based on the Open Network framing selected)
1=IESS-310 mode, valid with QDI, unframed, IBS, D&I, IDR.
2=EF Data legacy standard (225,205) – unframed, QDI only
3=IBS (126,112) – unframed only
Example: TRS=0 (This is a ‘don’t care’ if no RS is selected under FEC Type)
Available all framing modes, except EDMAC.
Command or Query.
Tx Spectrum Invert selection, where:
0=Normal
1=Tx Spectrum Inverted
Example:TSI=0 (selects normal)
Command or Query.
Tx Scrambler state, where:
0=Off
1=Normal
2=IESS-315
Note: When CnC mode is ON, Tx Scrambler state is fixed as IESS-315.
Example: TSC=1 (Scrambler On)
Command or Query.
Tx Output power level between 0 and -40 dBm (minus sign assumed) for 950 to 1950MHz range.
Tx Output power level between 0 and -25 dBm (minus sign assumed) for 50 to 180MHz range.
Example: TPL=13.4
In AUPC mode, command is not valid. Response will be TPL*.
When APC is active, query returns “TPL=99.9”; when command is not valid, response will be TPL*.
When the external 20 dB attenuator is activated (via AUP), the permitted power level range shifted down by
20dB.
Example: –65 and -20 dBm.
600 Emulation:
Level range: 0 to -20 dBm (minus sign assumed).
600L Emulation:
Level range: 0 to -45 dBm (minus sign assumed).
D–14
Response to
Command
Query
(Instruction &
Qualifier)
TDI=
TDI?
TDI*
TDI#
TDI?
TRS=
TRS?
TRS*
TRS#
TRS?
TSI=
TSI?
TSI*
TSI#
TSI?
TSC=
TSC?
TSC*
TSC#
TSC?
TPL=
TPL?
TPL*
TPL#
TPL?
Exception –
600/L Emulation:
ITD?
Response to
Query
TDI=x
(see Description of
Arguments)
TRS=x
(see Description of
Arguments)
TSI=x
(see Description of
Arguments)
TSC=x
(see Description of
Arguments)
TPL=xx.x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Command
(Instruction
& Qualifier)
Tx Carrier
State
TXO=
Tx Alpha
TXA=
Power Level
Mode
(was AUPC
Enable)
AUP=
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
1 byte, value
of 0 thru 9
Command or Query.
Tx Carrier State in the form x, where:
0=OFF due to front panel or remote control command
1=ON
2=RTI (receive/transmit inhibit), timeout = 10 seconds
3=OFF due to ext H/W Tx Carrier- Off control
*
4=OFF due to BUC or High-Stability Ref warm-up
*
5= Carrier controlled by STDMA Controller
*
6=RTI (receive/transmit inhibit), timeout = 1 second
7=RTI (receive/transmit inhibit), timeout = 2 seconds
8=RTI (receive/transmit inhibit), timeout = 4 seconds
9=RTI (receive/transmit inhibit), timeout = 7 seconds
Note: arguments indicated with a * are status-only. They are not valid as a command, and are not
indicated in MGC? response.
Example: TXO=1 (Tx Carrier ON)
1 byte, value of Command or Query.
0 or 1
Tx Filter Rolloff Factor in the form x, where:
x = 0 (0.35) or 1 (0.25)
Example: TXA=0 (Tx filter rolloff factor is 0.35)
1 byte, 0, 1, 2 Command or Query.
or 3
Power level mode in the form x, where:
0=MANUAL mode (AUPC disabled).
Normal power mode
1=AUPC enabled.
2=MANUAL-LOW.
Low power mode (-65 to -20dBm) - external attenuator activated.
3=AUPC-LOW.
AUPC enabled and external attenuator activated
Example: AUP=1
Notes:
1. EDMAC or D&I++, E1 D&I w/ccs or ESC++ framing must be selected for the AUPC feature to be
available.
2. External 20dB Attenuator is a hardware option.
D–15
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
TXO=
TXO?
TXO*
TXO#
TXO?
TXO=x
TXA=
TXA?
TXA#
TXA?
TXA=x
(see Description of
Arguments)
AUP=
AUP?
AUP*
AUP#
AUP?
AUP=x
(see Description of
Arguments)
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
AUPC
Parameters
Command
(Instruction
& Qualifier)
APP=
Remote
Eb/No
N/A
Tx Power
Level
Increase
N/A
Tx Clock
Source
TCK=
Number of
Arguments
6 bytes
4 bytes
3 bytes
1 byte, value
of 0 thru 3
Revision 15
MN-CDM625
Description of Arguments
Command or Query.
Defines AUPC operating parameters in the form abc.cd:
a=Defines action on max. power condition, where:
(0=do nothing, 1=generate Tx alarm)
b=Defines action on remote demod unlock, where:
(0=go to nominal power, 1=go to max power)
c.c=Target Eb/No value, for remote demod from 0.0 to 14.9 dB, where:
numbers above 9.9 use hex representation for the first character, i.e. 14.9 is coded as E.9.
d =Max increase in Tx Power permitted, from 0.0 to 9.0 dB
Example: APP=015.67 (Sets no alarm, max power, 5.6 dB Target and 7 dB power increase.)
In IP-ACM mode:
a=Defines action on max. power condition, where:
(0=do nothing, 1=generate Tx alarm when max power is reached, 2=generate Tx alarm when mimimum
ModCod is reached)
b=Defines action on remote demod unlock, where:
(0=go to nominal power, 1=go to max power, 2=hold)
c.c = Max increase in Tx Power permitted, from 0.0 to 9.9 dB OR when CnC mode is on, from 0.0 to 3.0 dB
d = Mode (0=Normal, 1=+/- Track), read-only
Query only.
Returns the value of Eb/No of the remote demod in the form xx.x, where:
xx.x=02.0 to 16.0
Responds 99.9 = remote demod unlocked.
Responds xx.x if EDMAC is disabled.
Example: REB=12.4
Note: For values > 16.0 dB, the reply will be 16.0
Query only.
Returns the increase in Tx power level, in dB (from the nominal setting) due to the action of AUPC.
Responds x.x if AUPC is disabled.
Example: PLI=2.3
Command or Query.
Tx Clock Source, where:
0=Internal
1=Tx Terrestrial
2=Rx Loop-Timed
3=Ext TT (ST=RxSat)
Example: TCK=0 (selects Internal)
D–16
Response to
Command
Query
(Instruction &
Qualifier)
APP=
APP?
APP*
APP#
APP?
N/A
REB?
Response to
Query
APP=abc.cd
(see Description of
Arguments)
REB=xx.x
(see Description of
Arguments)
N/A
PLI?
PLI=x.x
(see Description of
Arguments)
TCK=
TCK?
TCK*
TCK#
TCK?
TCK=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Command
(Instruction
& Qualifier)
Tx Clock
Invert
TCI=
Tx Audio
Volume
Control
TVL=
Transmit
Terrestrial
Alarm Mask
TTA=
Drop Type
DTY=
Tx Drop
Timeslot
DTS=
Tx Ternary
Code
TTC=
Transmit
Backward
Alarms
Enable
TBA=
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
1 byte, value 0 Command or Query.
or 1
Invert Transmit Data Clock in the form x, where:
0=Normal
1=Inverted
4 bytes
Command or Query. (Audio/IDR parameter)
Tx Audio Volume control in the form aabb, where:
aa=Tx 1 volume control in dB, valid values are -6, -4, -2, +0, +2, +4, +6, +8;
bb=Tx 2 volume control in dB, valid values are -6, -4, -2, +0, +2, +4, +6, +8;
Example: TVL= -2+4 (sets Tx 1 to 2 dB and Tx 2 to +4 dB)
1 byte, 0 or 1
Command or Query. (DROP parameter)
Transmit terrestrial Alarm Mask conditions in the form x, where:
0=Alarm is active (unmasked).
1=Alarm is masked.
Example: TTA=1 (masks an alarm).
1 byte, value
Command or Query. (DROP/D&I++/QDI parameter)
of 0 thru 3
Drop Type in the form x, where:
0=T1–D4
1=T1–ESF
2=E1–CCS
3=E1–CAS
3 bytes
Command or Query. (Drop parameter)
(Note different format between command and query.)
Command format: DTS=xxy, where:
xx = Channel 01 through 24
y = timeslot: 0-9, A=10, B=11, C=12, D=13,…V=31
TCI=
TCI?
TCI*
TCI#
TVL=
TVL?
TVL*
TVL#
TCI?
TCI=x
TVL?
(see Description of
Arguments)
TVL=aabb
TTA=
TTA?
TTA*
TTA#
TTA?
DTY=
DTY?
DTY*
DTY#
DTY?
DTS=
DTS?
DTS*
DTS#
DTS?
1 byte, value
of 0 thru 3
TTC=
TTC?
TTC*
TTC#
TTC?
TBA=
TBA?
TBA*
TBA#
TBA?
4 bytes, each
a value of 0
thru 2
Command or Query. (G.703 parameter)
Tx Ternary Code in the form x, where:
0=AMI
1=B8ZS
2=B6ZS
3=HDB3
Example: TTC=1 (selects B8ZS)
Command or Query. (IDR parameter)
Transmit Backward Alarm enable in the form xxxx, where:
0=Disable
1=Enable Internal (S/W)
2=Enable External (H/W)
Example: TBA=0120
D–17
(see Description of
Arguments)
TTA=x
(see Description of
Arguments)
DTY=x
(see Description of
Arguments)
DTS=yyyyyyyyyyyyy
yyyyyyyyyyy
indicating all 24 Drop
timeslots values
associated with the
24 Tx Satellite
channels.
TTC=x
(see Description of
Arguments)
TBA=xxxx
Position indicates
backward alarm
numbers: 1234
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Command
(Instruction
& Qualifier)
Transmit
ESC Type
TET=
TX LO
Frequency
TLO=
Tx Satellite
(Terminal)
Frequency
N/A
Tx
Information
Rate
N/A
Tx Sub-Mux
IP
Information
Rate
N/A
Number of
Arguments
1 byte, 0 or 1
Revision 15
MN-CDM625
Description of Arguments
9 bytes,
numeric
Command or Query. (IDR parameter)
IDR ESC Type in the form x, where:
0=64k data channel
1=2 Audio channels
Command or Query.
Tx LO frequency information in the form xxxxxs, where:
xxxxx is the LO frequency, 3000 through 65000 MHz or 00000 (OFF)
s is the sign for the MIX
Terminal Frequency = LO ± TFQ (see below)
Example: TLO=12000+ (BUC LO is 12GHz, low-side mix)
Query only.
Terminal (aka satellite) Tx Frequency, which is the frequency transmitted to the satellite.
Resolution=100 Hz
Returns 00000.0000 if LO is zero
Example: TTF=11650.2249
Query only.
This command allows remote access to the Aggregate Tx Information rate in the form: ddddd.ddd
9 bytes,
numeric
Query only.
This command allows remote access to the IP portion of the Tx Information rate in the form: ddddd.ddd
6 bytes
10 bytes
D–18
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
TET=
TET?
TET*
TET#
TLO=
TLO?
TLO*
TLO#
TET?
TET=x
TLO?
(see Description of
Arguments)
TLO=xxxxxs
N/A
TTF?
(see Description of
Arguments)
TTF=xxxxx.xxxx
(see Description of
Arguments)
TIR?
TIR=
TIR*
TIR#
TMI?
TMI=
TMI*
TMI#
TIR?
TIR=ddddd.ddd
TMI?
(see Description of
Arguments)
TMI=ddddd.ddd
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
D.5.3
Revision 15
MN-CDM625
Rx Parameters
Priority System: RIT (Highest priority) , RFM, RFT, RMD, RCR, RDR, and RSR (Lowest Priority), indicated by shading. Any change to a higher
priority parameter can override any of the parameters of lower priority.
Exception – Select DROP, D&I++ or QDI mode using RFM (Transmit Framing type), which is highest priority.
Parameter
Type
Command
(Instruction
& Qualifier)
Rx Interface
Type
RIT=
Rx Framing
Mode
RFM=
Number of
Arguments
1 byte, value
of 0 thru 9, or
A
1 byte, value
of 0 thru 9, A
Description of Arguments
Command or Query.
Rx Interface Type in the form x, where:
0=RS422
1=V.35
2= reserved – do not use.
3=Balanced G.703
4=Unbalanced G.703
5=Audio (only at 64 kbps) (IBS/EDMAC only) (FAST option)
6=LVDS
7=HSSI
8=IP
9=ASI
A=IP-ACM
Example: RIT=1 (selects V.35)
Command or Query.
Rx Framing mode in the form x, where:
0=Unframed
1=IBS (requires Open Network FAST option)
2=IDR (requires Open Network FAST option)
3=D&I
(requires D&I FAST option)
4=EDMAC
5=D&I++ (requires D&I FAST option)
6=ESC++
7=EDMAC-2
8=Quad Drop & Insert (requires QDI FAST option)
9=Framed QDI (requires QDI FAST option)
(G.703 Balanced, E1-CCS only)
A=EDMAC-3
Example: RFM=0 (selects Unframed mode)
D–19
Response to
Command
Query
(Instruction &
Qualifier)
RIT=
RIT?
RIT*
RIT#
RIT?
RFM=
RFM?
RFM*
RFM#
RFM?
Response to
Query
RIT=x
(see Description of
Arguments)
RFM=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Command
(Instruction
& Qualifier)
Rx FEC Type RFT=
Rx Demod
Type
RMD=
Number of
Arguments
1 byte, value
of 0 thru 9, A,
B
1 byte, value
of 0 to 5
Revision 15
MN-CDM625
Description of Arguments
Command or Query.
Rx FEC Type in the form x, where:
0=None (uncoded) with differential encoding ON
1=Viterbi
2=Viterbi + Reed-Solomon
3= Sequential
4= Sequential + Reed-Solomon
5=TCM (Trellis Code Modulation)
6=TCM + Reed-Solomon
7=TPC (aka Turbo) (Requires Codec, FAST)
8=None (uncoded) with differential encoding OFF
9=LDPC
(Requires Codec, FAST)
A=VersaFEC CCM or ACM (Fixed in IP-ACM)
B=VersaFEC ULL
Example: RFT=1 (selects Viterbi only)
Command or Query (Query only in IP-ACM).
Rx Demodulation in the form x, where:
0=BPSK
1=QPSK
2=OQPSK
3=8-PSK (FAST option)
4=16-QAM (Turbo or Viterbi + RS only)(FAST option)
5=8-QAM (TPC/LDPC only) (Needs Codec + FAST option)
6=Reserved
7=Reserved
8=Reserved
Depending on FEC type, not all of these selections will be valid.
All other codes are invalid.
Example: RMD=2 (selects OQPSK)
D–20
Response to
Command
Query
(Instruction &
Qualifier)
RFT=
RFT?
RFT*
RFT#
RFT?
RMD=
RMD?
RMD*
RMD#
RMD?
Response to
Query
RFT=x
(see Description of
Arguments)
RMD=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Command
(Instruction
& Qualifier)
Rx FEC Code RCR=
Rate
Number of
Arguments
1 byte, value
of 0 to 7, A to
U
Revision 15
MN-CDM625
Description of Arguments
Command or Query (Query only in IP-ACM).
Rx FEC Code Rate in the form x, where:
0=Rate 1/2
1=Rate 3/4
2=Rate 7/8
3=Rate 2/3 (8-PSK TCM or LDPC only)
4=Rate 1/1 (Uncoded or No FEC)
5=Rate 21/44 (Turbo Only)
6=Rate 5/16 (Turbo Only)
7=Rate 0.95 (Turbo Only) (aka 17/18)
8=Reserved
9=Reserved
A=VersaFEC CCM ModCod 0 – BPSK 0.488
B=VersaFEC CCM ModCod 1 – QPSK 0.533
C=VersaFEC CCM ModCod 2 – QPSK 0.631
D=VersaFEC CCM ModCod 3 – QPSK 0.706
E=VersaFEC CCM ModCod 4 – QPSK 0.803
F=VersaFEC CCM ModCod 5 – 8-QAM 0.642
G=VersaFEC CCM ModCod 6 – 8-QAM 0.711
H=VersaFEC CCM ModCod 7 – 8-QAM 0.780
I=VersaFEC CCM ModCod 8 – 16-QAM 0.731
J=VersaFEC CCM ModCod 9 – 16-QAM 0.780
K=VersaFEC CCM ModCod 10 – 16-QAM 0.829
L=VersaFEC CCM ModCod 11 – 16-QAM 0.853
M=Reserved
N=Reserved
O=VersaFEC CCM ModCod 14 – 8-QAM 0.576
P=VersaFEC CCM ModCod 15 – 16-QAM 0.644
Q=Reserved
R=VersaFEC CCM ULL ModCod 17 – BPSK 0.493
S=VersaFEC CCM ULL ModCod 18 – QPSK 0.493
T=VersaFEC CCM ULL ModCod 19 – QPSK 0.654
U=VersaFEC CCM ULL ModCod 20 – QPSK 0.734
Depending on FEC type, not all of these selections will be valid.
Example: RCR=1 (selects Rate 3/4)
D–21
Response to
Command
RCR=
RCR?
RCR*
RCR#
Query
(Instruction &
Qualifier)
RCR?
Response to
Query
RCR=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Command
(Instruction
& Qualifier)
Rx Data Rate RDR=
Number of
Arguments
9 bytes
Rx Symbol
Rate
RSR=
9 bytes,
numeric
Rx
Frequency
RFQ=
9 bytes
Rx Sub-Mux
on/off
RMX=
Rx Sub-Mux
Ratio
RMR=
Revision 15
MN-CDM625
Response to
Command
Description of Arguments
Command or Query (Query only in IP-ACM).
Rx Data Rate, in kbps, between 18 kbps to 25 Mbps.
Resolution=1 bps
Example: RDR=02047.999.
Additional auxiliary G.703 sub-rates are available, selected using:
00512.AUX
01024.AUX
02048.AUX
If set for QDI (Quad D&I), RDR is query only.
The connectors used for the Aux rates are IDI/DDO.
These Aux rates are not available with D&I or IDR.
Query only (Command or Query in IP-ACM).
Allows remote access to the Rx Symbol Rate in the form ddddd.ddd
Note: Symbol Rate ranges in IP-ACM = 37 ksym/sec to 4100 ksym/sec
Command or Query.
Frequency ranges:
50 MHz to 180 MHz, and
950 MHz to 1950 MHz (L-Band – FAST option)
Exception –
950 MHz to 2150 MHz (Top card hardware Revision 2)
600 Emulation: Resolution=100Hz.
8 bytes
Note: The CDM-625 supports 70,140 MHz bands and L-Band.
Example: RFQ=0950.9872
1 byte, 0 or 1
Command or Query.
Rx Sub-Mux in the form x, where:
0=Off
1=On
2 bytes,
numeric
Command or Query.
Rx Sub-Mux Ratio (IP/Synchronous Interface) in the form xx, where:
00=1/9
08=2/5
16=5/4
01=1/8
09=3/7
17=4/3
02=1/7
10=1/2
18=3/2
03=1/6
11=3/5
19=5/3
04=1/5
12=2/3
20=2/1
05=1/4
13=3/4
21=7/3
06=2/7
14=4/5
22=5/2
07=1/3
15=1/1
23=3/1
Example: RMR=01 (Selects ratio 1/8)
D–22
24=7/2
25=4/1
26=5/1
27=6/1
28=7/1
29=8/1
30=9/1
31=1/59 32=1/39 33=1/19
Query
(Instruction &
Qualifier)
Response to
Query
RDR=
RDR?
RDR*
RDR#
RDR?
RDR=xxxxx.xxx
RSR=
RSR?
RSR*
RSR#
RFQ=
RFQ?
RFQ*
RFQ#
RSR?
RSR=ddddd.ddd
(see Description of
Arguments)
RFQ?
RFQ=xxxx.xxxx
(see Description of
Arguments)
RMX?
RMX=
RMX*
RMX#
RMX?
RMR?
RMR=
RMR*
RMR#
RMR?
(see Description of
Arguments)
Exception –
600 Emulation:
RFQ=xxx.xxxx
RMX=x
(see Description of
Arguments)
RMR=xx
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Rx Data
Invert
RDI=
Exception –
600/L
Emulation:
IRD=
1 byte, 0 or 1
Rx ReedSolomon
Decoding
RRS=
1 byte, value
of 0 thru 3
Rx Spectrum
Invert
RSI=
Rx
Descrambler
RDS=
Rx Demod
Acquisition
Sweep Width
RSW=
1 byte, 0 or 1
1 byte, 0 or 1
3 bytes
Exception –
600L
Emulation:
2 bytes
Revision 15
MN-CDM625
Description of Arguments
Command or Query.
Invert Receive Data in the form x, where:
0=Normal
1=Inverted
Example: RDI=1 (selects Inverted RX Data)
Command or Query.
Rx RS decoding in the form x, where:
0=Normal (based on the Open Network framing selected)
1=IESS-310 mode, valid with QDI, unframed, IBS, D&I, IDR.
2=EF Data legacy standard (225,205) – unframed, QDI only
3=IBS (126,112) – unframed only
Note: Available in all framing modes, except EDMAC.
(This is a ‘don’t care’ if no R-S is selected in FEC type)
Example: RRS=0 (selects Normal)
Command or Query.
Rx Spectrum Invert in the form x, where:
0=Normal
1=Rx Spectrum Invert
Example: RSI=0 (selects Normal)
Command or Query.
Rx Descrambler state in the form x, where:
0=Off
1=Normal
2=IESS-315
Example: RDS=1 (Scrambler On)
Command or Query.
Rx ± acquisition sweep range of demodulator, in kHz. Available range depends on the symbol rate:
18ksps to 64ksps:
± 1 to the symbol rate (ksps)/2
64ksps to 389ksps:
± 1 to 32 kHz
389ksps to 2000ksps: ± 1 to 10% of sym rate
>2000ksps:
± 1 to 200 kHz
Example: RSW=009 (selects ± 9 kHz)
D–23
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
RDI=
RDI?
RDI*
RDI#
RDI?
RDI=x
Exception –
600/L Emulation:
IRD?
(see Description of
Arguments)
RRS=
RRS?
RRS*
RRS#
RRS?
RRS=x
RSI=
RSI?
RSI*
RSI#
RSI?
RDS=
RDS?
RDS*
RDS#
RDS?
RSW=
RSW?
RSW*
RSW#
RSW?
(see Description of
Arguments)
RSI=x
(see Description of
Arguments)
RDS=x
(see Description of
Arguments)
RSW=xxx
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Command
(Instruction
& Qualifier)
Rx Clock
Source
RCK=
Rx Clock
Invert
RCI=
Eb/No Alarm
Point
EBA=
Rx Buffer
Size
RBS=
Rx Audio
Volume
Control
RVL=
Receive
RTE=
Terrestrial
Alarm Enable
Insert Type
ITY=
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
1 byte, value
of 0 thru 3
Command or Query.
Rx Clock Source in the form x, where:
0=Rx Satellite
1=Tx-Terrestrial
2=Internal(SCT)
3=INSERT (command valid only when Rx framing is Insert or D&I++ and interface is G.703 or set for
D&I loop)
Example: RCK=1 (selects Tx-Terrestrial)
1 byte, value 0 Command or Query.
or 1
Invert Receive Clock, in the form x, where:
0=Normal
1=Inverted
4 bytes
Command or Query.
Eb/No alarm point in dB, with a range between 0.1 and 16 dB, in the form xx.x, where:
Resolution=0.1 dB
Example: EBA=12.3
5 bytes
Command or Query.
Rx Buffer Size, 16 to 32768 bytes, in 2-byte steps, unless other limitations apply.
(See Sect. 5.3.1.5.2)
Example: RBS=08192 (selects 8192 bytes)
4 bytes
Command or Query. (Audio/IDR parameters)
Rx Audio Volume control, in the form aabb, where:
aa=Rx 1 volume control in dB, valid values are -6, -4, -2, +0, +2, +4, +6, +8;
bb=Rx 2 volume control in dB, valid values are -6, -4, -2, +0, +2, +4, +6, +8.
Example: RVL= -2+4 (sets Rx 1 to -2 dB and Rx 2 to +4 dB)
1 byte, 0 or 1
Command or Query. (INSERT mode parameter)
Receive Terrestrial Alarm Enable conditions in the form x, where:
0=Disables the alarm
1=Enables the alarm.
Example: RTE=0 (disables the alarm).
1 byte, value
Command or Query. (INSERT/D&I++/QDI parameter)
of 0 thru 3
Insert Type, in the form x where:
0=T1–D4
1=T1–ESF
2=E1–CCS
3=E1–CAS
D–24
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
RCK=
RCK?
RCK*
RCK#
RCK?
RCK=x
RCI=
RCI?
RCI*
RCI#
EBA=
EBA?
EBA*
EBA#
RCI?
RCI=x
EBA?
(see Description of
Arguments)
EBA=xx.x
RBS=
RBS?
RBS*
RBS#
RBS?
RVL=
RVL?
RVL*
RVL#
RVL?
RTE=
RTE?
RTE*
RTE#
RTE?
ITY=
ITY?
ITY*
ITY#
ITY?
(see Description of
Arguments)
(see Description of
Arguments)
RBS=xxxxx
(see Description of
Arguments)
RVL=aabb
(see Description of
Arguments)
RTE=x
(see Description of
Arguments)
ITY=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Command
(Instruction
& Qualifier)
Rx Ternary
Code
RTC=
Receive
Backward
Alarms
Enable
RBA=
Receive ESC
Type
RET=
Insert
Timeslot
ITS=
ReCenter
Buffer
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
1 byte, value
of 0 thru 3
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
Command or Query. (G.703 parameter)
Rx Ternary Code in the form x, where:
0=AMI
1=B8ZS
2=B6ZS
3=HDB3
Example: RTC=1 (selects B8ZS)
4 bytes, each Command or Query. (IDR parameter)
a value of 0 or Enable Receive backward alarm enable in the form xxxx, where:
1
0=Disable
1=External trigger Enable
Example: RBA=0101
1 byte, 0 or 1
Command or Query. (IDR parameter)
Sets or queries IDR ESC Type in the form x, where:
0=64k data channel
1=2 Audio channels
3 bytes
Command or Query. (D&I/D&I++ only)
(Note different format between command and query.)
Insert Timeslot in the form xxy, where:
xx = Channel 01 through 24
y = timeslot: 0-9, A=10, B=11, C=12, D=13,…V=31
RTC=
RTC?
RTC*
RTC#
RTC?
RBA=
RBA?
RBA*
RBA#
RBA?
RET=
RET?
RET*
RET#
ITS=
ITS?
ITS*
ITS#
RET?
RCB=
None
Command only.
Forces the software to recenter the receive Plesiochronous/Doppler buffer.
Note: This command takes no arguments.
Example: RCB=
RCB=
RCB?
RCB*
RCB#
N/A
N/A
RX LO
Frequency
RLO=
6 bytes
RLO=
RLO?
RLO*
RLO#
RLO?
RLO=xxxxxs
Rx Terminal
Frequency
N/A
Command or Query.
LNB Rx LO frequency information in the form xxxxxs, where:
xxxxx is the LO frequency: 03000 through 65000 MHz, or 00000=Off
s is the sign for the MIX (Note: negative mix induces a spectral inversion)
Note: For additional information refer to Chapter 5 for LO, MIX, and Spectrum Settings.
Terminal Frequency = RX LO ± modem RFQ (see below)
Query only.
Rx Terminal Frequency, which is the frequency (MHz) being received from the satellite.
Note: For additional information refer to Chapter 5 for LO, MIX, and Spectrum Settings.
Resolution=100 Hz
Returns 00000.0000 if LNB LO is zero
Example: RTF=11650.2249 (MHz)
N/A
RTF?
10 bytes
D–25
RTC=x
(see Description of
Arguments)
RBA=xxxx
(see Description of
Arguments)
ITS?
RET=x
(see Description of
Arguments)
ITS=yyyyyyyyyyyyy
yyyyyyyyyyy
indicating all 24 Insert
timeslots values
associated with the 24
Rx Satellite channels.
(see Description of
Arguments)
RTF=xxxxx.xxxx
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Command
(Instruction
& Qualifier)
Receive
Equalizer
Enable
REE=
Rx Info Rate
N/A
Rx Sub-Mux
IP Info Rate
N/A
Number of
Arguments
1 byte
Revision 15
MN-CDM625
Description of Arguments
9 bytes,
numeric
Command or Query.
Rx Equalizer in the form x, where:
0=disabled
1=enabled
The default is 0.
Query only.
Allows remote access to the Aggregate Rx Information rate in the form ddddd.ddd
9 bytes,
numeric
Query only.
Allows remote access to the IP portion of the Rx Information rate in the form ddddd.ddd
D–26
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
REE=
REE?
REE*
REE#
REE?
REE=x
RIR?
RIR=
RIR*
RIR#
RMI?
RMI=
RMI*
RMI#
RIR?
RIR=ddddd.ddd
RMI?
(see Description of
Arguments)
RMI=ddddd.ddd
(see Description of
Arguments)
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
D.5.4
Parameter
Type
Unit Parameters
Command
(Instruction
& Qualifier)
Local/
Remote
Status
LRS=
Modem
Emulation
EMU=
Front Panel
Lockout
FPL=
Software
Image
IMG=
Circuit ID
String
CID=
RTC Date
DAY=
Revision 15
MN-CDM625
Number of
Arguments
Description of Arguments
1 byte, 0 to 3
Command or Query.
Used set the user’s Local/Remote status in the form x, where:
0=Local
1=Serial Remote (RS-232/RS-485)
2=reserved
3=Ethernet Remote
Example: LRS=1 (selects Serial Remote)
1 byte, value
Command or Query.
0,1 or 2
The CDM-625 is designed to be a ‘drop-in’ replacement for the CDM-600 or CDM-600L modems. In order
for complete modem Emulation, all parameters, including the EID (equipment ID) must be that of the
modem it is emulating. This parameter permits the CDM-625 modem to be configured that way.
The format for the argument is x, where x is:
0= full capability CDM-625 modem (default)
1= to emulate the CDM-600 modem
2= to emulate the CDM-600L modem
1 byte, numeric Command or Query.
Control the state of front-panel lockout in the form x, where:
0= no lockout
1= front panel lockout active.
Disable the lockout by either FPL=0, or by setting into local mode using LRS=0.
1 byte, value of Command or Query.
1 or 2
Active software image in the form x, where:
1=Bulk Image #1 currently active
2=Bulk Image #2 currently active
40 bytes
Command or Query.
Sets or queries the user-defined Circuit ID string, which is a fixed length of 40 characters.
Valid characters include:
Space ( ) * + – , . / 0 9 and A thru Z
6 bytes
Command or Query.
A date in the form ddmmyy (European format), where
dd = day of the month (01 to 31)
mm = month (01 to 12)
yy = year (00 to 99)
Example: DAY=240457 (April 24, 2057)
D–27
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
LRS
LRS?
LRS*
LRS#
LRS?
LRS=x
(see Description of
Arguments)
EMU=
EMU?
EMU*
EMU#
EMU?
EMU=x
(see Description of
Arguments)
FPL=
FPL?
FPL*
FPL#
FPL?
FPL=x
(see Description of
Arguments)
IMG=
IMG?
IMG*
IMG#
CID=
CID?
CID*
CID#
DAY=
DAY?
DAY*
DAY#
IMG?
IMG=x
(see Description of
Arguments)
CID?
CID=x
(see Description of
Arguments)
DAY?
DAY=ddmmyy
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Command
(Instruction
& Qualifier)
TIM=
6 bytes
EDMAC
Framing
Mode
EFM=
1 byte, 0 or 1
EDMAC
Slave
Address
Range
ESA=
4 bytes
One Time
EDMAC Slave
Overwrite
OTO=
1 byte, value
of 0 or 1
Engineering
Service
Channel
ESC=
Parameter
Type
RTC Time
Number of
Arguments
1 byte, 0 or 1
Revision 15
MN-CDM625
Description of Arguments
Command or Query.
A time in the form hhmmss, indicating the time from midnight, where:
hh = hours (00 to 23)
mm = minutes (00 to 59)
ss = seconds (00 to 59)
Example: TIM=231259 (23 hours:12 minutes:59 seconds)
Command or Query.
EDMAC mode in the form x, where:
0=EDMAC OFF (Idle Mode)
1=EDMAC ON (Master Mode)
2=EDMAC ON (Slave Mode, Query Only)
Example: EFM=1 (EDMAC Enabled as Master)
Command or Query.
EDMAC Slave Address Range - sets the range of addresses of distant-end units (modems or transceivers)
that this unit, as the Master, will forward messages for. Only values which are integer multiples of ten are
permitted. (0010, 0020, 0030, 0040 etc.)
Example: ESA=0090
This command is only valid for an EDMAC master. When used as a Query, it may be sent to an EDMAC
slave, which will respond with the appropriate address.
Command or Query.
One Time Overwrite to EDMAC Slave modem in the form x, where:
0=Off
1=On
Examples:
OTO=1 causes EDMAC Slave modem to be able to accept ONE remote control command locally after
OTO=1 command.
OTO=0 turns off One Time Overwrite, only EDMAC command from EDMAC Master modem will be
accepted by Slave modem.
Command or Query. (IBS and ESC++ feature)
ESC in the form x, where:
0 = Disable the high-rate ESC
1 = Enable the high-rate ESC
IBS ESC may only be enabled when:
1. Both Tx and Rx framing modes are set to IBS.
2. Data rate is not 1544 kbps (as spare overhead bits are not available in this mode).
3. IBS high-rate ESC FAST option is enabled.
D–28
Response to
Command
TIM=
TIM?
TIM*
TIM#
Query
(Instruction &
Qualifier)
TIM?
Response to
Query
TIM=hhmmss
(see Description of
Arguments)
EFM=
EFM?
EFM*
EFM#
EFM?
EFM=x
(see Description of
Arguments)
ESA=
ESA?
ESA*
ESA#
ESA?
ESA=xxxx
(see Description of
Arguments)
OTO=
OTO?
OTO*
OTO#
OTO?
OTO=x
ESC=
ESC?
ESC*
ESC#
ESC?
(see Description of
Arguments)
ESC=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
ESC
Parameters
External
Frequency
Reference
Adjustment
for Internal
10MHz Highstability
Reference
Warm-up
Delay
Command
(Instruction
& Qualifier)
SCP=
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
3 bytes,
numeric
Command or Query. (IBS and ESC++ feature)
Allows control of the ESC baud rate and character format in the form xyz, where:
x is the index for baud rate:
0=1200 baud
1=2400 baud
2=4800 baud
3=9600 baud
4=19200 baud
5=38400 baud
6=14400 baud
7=28800 baud
y is the character format (data bits, parity, stop bits):
0=8N1 char format
1=7E2 char format
2=7O2 char format
z is the interface type:
0=RS-232
Exception –
1=RS-485
The baud rate may be limited by the data rate. The ESC baud rate breakpoints (determined by data rate)
600/L
are shown in Chapter 5 and Chapter 12. A response of SCP* will indicate if the data rate will not allow a
Emulation:
SCP=xy
selected baud rate to operate.
EFR=
1 byte, value of Command or Query.
0 thru 6
External Frequency Reference in the form x, where:
0=Internal 10MHz (default)
1=External 1 MHz
2=External 2 MHz
3=External 5 MHz
4=External 10 MHz
Exception –
5=spare
600L Emulation:
6=Internal 10MHz plus output.
This means that the Reference is available on the “Ext Ref” rear connector (small rear-panel LED
MRC=
indicates when ON)
ADJ=
4 bytes,
Command or Query.
numeric
Provides fine adjustment of the Internal 10MHz Reference on the High-Stability Frequency Reference
module in the form sddd, where:
s= sign (+ or –)
ddd= value, 0-999.
WRM=
1 byte, 0 or 1
Command or Query. (Hi-Stab Ref parameter)
Hi-stab Ref warm-up delay parameter in the form x, where:
0= Delay off (instant on)
1= Warm-up Delay on
D–29
Response to
Command
SCP=
SCP?
SCP*
SCP#
Query
(Instruction &
Qualifier)
SCP?
Response to
Query
SCP=xyz
(see Description of
Arguments)
Exception –
600/L Emulation:
SCP=xy
EFR=
EFR?
EFR*
EFR#
Exception –
600L Emulation:
MRC=
MRC?
MRC*
MRC#
EFR?
EFR=x
(see Description of
Arguments)
Exception –
600L Emulation:
MRC=?
Exception –
600L Emulation:
MRC=x
ADJ=
ADJ?
ADJ*
ADJ#
ADJ?
ADJ=sddd
(see Description of
Arguments)
WRM=
WRM?
WRM*
WRM#
WRM?
WRM=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Command
(Instruction
& Qualifier)
Countdown of CTD=
Warm-up
Delay
remaining
Unit Test
TST=
Mode
Parameter
Type
Unit Alarm
Mask
MSK=
Attach
ABA=
summary BUC
fault to Tx FLT
status
Attach
ALA=
summary LNB
fault to Rx FLT
status
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
3 bytes,
numeric
Command or Query. (Hi-Stab Ref parameter)
Hi-stab Ref countdown parameter in the form xxx, where:
xxx = countdown of the number of seconds remaining of the Warm-up time.
As a command, the only permitted format is CTD=000, which abandons the delay.
1 byte, value of Command or Query.
0 thru 6
Unit Test Mode, where:
0=Normal Mode (no test)
1=Tx CW
2=Tx Alternating 1,0 Pattern
3=IF Loopback
4=RF Loopback
5=Digital Loopback
6=I/O Loopback
Example: TST=3 (IF Loopback)
13 bytes
Command or Query.
Alarm mask conditions in form abcdefghjklxx, where:
a=Tx AIS
b=Rx AIS
c=bufferslip Alarm
d=spare
e=Rx AGC Alarm
f=Eb/No Alarm
g=BUC Alarm
h=LNB Alarm
j=G.703 Loss of Signal alarm
k=Reference alarm
l=Tx Clock Alarm
xx (spare)
Exception –
Value of each mask:
600L
0 = unmasked
Emulation:
1 = masked
6 bytes
Example: MSK=0101100000000
1 byte, 0 or 1
Command or Query.
0= Tx FLT status unaffected by BUC fault
1= Attach a summary BUC fault to Tx FLT status
1 byte, 0 or 1
Command or Query.
0= Rx FLT status unaffected by LNB fault
1= Attach a summary LNB fault to Rx FLT status
D–30
Response to
Command
CTD=
CTD?
CTD*
CTD#
TST=
TST?
TST*
TST#
Query
(Instruction &
Qualifier)
CTD?
Response to
Query
CTD=xxx
(see Description of
Arguments)
TST?
TST=x
(see Description of
Arguments)
MSK=
MSK?
MSK*
MSK#
MSK?
MSK=abcdefghjklxx
(see Description of
Arguments)
ABA=
ABA?
ABA*
ABA#
ALA=
ALA?
ALA*
ALA#
ABA?
ABA=x
(see Description of
Arguments)
ALA?
ALA=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Number of
Unread
stored Events
Retrieve next
5 unread
Stored
Events
Clear All
Stored
Events
Command
(Instruction
& Qualifier)
N/A
3 bytes
N/A
80 bytes
CAE=
Number of
Arguments
None
Revision 15
MN-CDM625
Description of Arguments
Query only.
Unit returns the Number of stored Events, which remain Unread, (over remote control) in the form xxx (0-255).
Example: NUE=126
Query only.
Unit returns the oldest 5 Stored Events which have not yet been read over the remote control in the reply
format
[CR]sub-body[CR]sub-body[CR]sub-body[CR]sub-body[CR]sub-body, where:
sub-body=ABCddmmyyhhmmss, where:
A is the fault/clear indicator:
F=Fault
C=Clear
I=Info
B is the fault type where:
1=Unit
2=Rx Traffic
3=Tx Traffic
4=Info (Power on/off, or log cleared)
5=Open Network
6=BUC
7=LNB
C is Fault Code number, as in FLT? or Info Code, which may be:
0=Power Off
1=Power On
2=Log Cleared
3=Global Config Change
4=Redundancy Config Change
5=Fractional CnC License is expiring.
6=Time Limited CnC License is expiring.
7=Fractional CnC is in use.
ddmmyy = date stamp.
hhmmss = time stamp.
If there are less than 5 events to be retrieved, the remaining positions are padded with zeros. If there are no
new events, the response is RNE*.
Command only.
Forces the software to clear the software events log.
Note: This command takes no arguments
Example: CAE=
D–31
N/A
Query
(Instruction &
Qualifier)
NUE?
N/A
RNE?
Response to
Command
Response to
Query
NUE=xxx
(see Description of
Arguments)
RNE=[CR]ABCddm
myyhhmmss[CR]A
BCddmmyyhhmms
s[CR]ABCddmmyyh
hmmss[CR]ABCdd
mmyyhhmmss[CR]
ABCddmmyyhhmm
ss
(see Description of
Arguments)
CAE=
CAE?
CAE*
CAE#
N/A
N/A
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Initialize
Stored
Events
Pointer
Statistics
Sample
Interval
Command
(Instruction
& Qualifier)
IEP=
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
N/A
Response to
Query
None
Command only.
Resets internal pointer to allow RNE? queries to start at the beginning of the stored events log.
IEP=
IEP#
SSI=
1 byte,
numerical
SSI=
SSI?
SSI*
SSI#
SSI?
SSI=x
(see Description of
Arguments)
Number of
Unread
stored
Statistics
N/A
3 bytes
N/A
NUS?
NUS=xxx
(see Description of
Arguments)
Retrieve next
5 unread
Stored
Statistics
N/A
135 bytes
Command or Query.
Used to set the sample interval for the Statistics Logging Function in the form x, where:
x= 0 to 9 in 10 minute steps.
Note: Setting this parameter to 0 disables the statistics logging function.
Example: SSI=3 means 30 minutes
Query only.
Unit returns the number of stored Statistics, which remain Unread (over remote control) in the form xxx,
where:
x = 0-255
Example: NUS=187
Query only.
Unit returns the oldest 5 Stored Statistics, which have not yet been read over the remote control in the reply
format [CR]sub-body[CR]sub-body[CR]sub-body[CR]sub-body[CR]sub-body, where sub-body=
AA.ABB.BC.CD.Dddmmyyhhmmss:
AA.A=Minimum Eb/No during sample period.
BB.B=Average Eb/No during sample period.
C.C=Max. Tx Power Level Increase during sample period.
D.D=Average Tx Power Level Increase during sample period.
ddmmyy = date stamp.
hhmmss = time stamp.
If there are no new events, the unit replies with RNS*. If there are less than 5 statistics to be retrieved, the
remaining positions are padded with zeros.
N/A
RNS?
RNS=[CR]AA.ABB.
BC.CD.Dddmmyyhh
mmss[CR]AA.ABB.
BC.CD.Dddmmyyhh
mmss[CR]AA.ABB.
BC.CD.Dddmmyyhh
mmss[CR]AA.ABB.
BC.CD.Dddmmyyhh
mmss[CR]AA.ABB.
BC.CD.Dddmmyyhh
mmss
(see Description of
Arguments)
D–32
N/A
CDM-625 Advanced Satellite Modem
Appendix D
Command
(Instruction
& Qualifier)
N/A
180 bytes
Clear All
Stored
Statistics
CAS=
None
Initialize
Statistics
Pointer
Force 1:1
Switch
ISP=
None
FSW=
None
Outdoor Unit
Comms
enable
ODU=
1 byte, 0 or 1
Parameter
Type
Retrieve
next 5
unread New
Stored
Statistics
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
Response to
Command
Query only.
Unit returns the oldest 5 Stored Statistics (including newly added Minimum and Average Receive Signal level),
which have not yet been read over the remote control in the reply form [CR]sub-body[CR]sub-body[CR]
sub-body[CR]sub-body[CR]sub-body, where sub-body = AA.ABB.BC.CD.DEE.E,FF.Fddmmyyhhmmss:
AA.A=Minimum Eb/No during sample period.
BB.B=Average Eb/No during sample period.
C.C=Max. Tx Power Level Increase during sample period.
D.D=Average Tx Power Level Increase during sample period.
EE.E=Negative value of Minimum Receive Signal Level in dB during sample period.
FF.F=Negative value of Average Receive Signal Level in dB during sample period.
ddmmyy = date stamp.
hhmmss = time stamp.
If there are no new events, the unit replies with RNN*. If there are less than 5 statistics to be retrieved, the
remaining positions are padded with zeros.
Note: RNN includes all information provided in RNS, plus Rx Signal level. Do not mix use of RNS and
RNN.
Command only.
Forces the software to clear the software statistics log.
Example: CAS=
Note: This command takes no arguments.
Command only.
Resets internal pointer to allow RNS? queries to start at the beginning of the statistics log.
N/A
Command only.
Forces unit to toggle Unit Fail relay to “fail” state for approx 500ms. If unit is part of a 1:1 pair and is currently
the ‘Online’ unit, this will force a switchover, so unit will then be in ‘Standby’ mode. The command is always
executed by the unit, regardless of whether it is standalone, in a 1:1 pair, or part of a 1:N system.
Note: This command takes no arguments.
Command or Query.
Enables or disables communications, via the FSK link, with a Comtech EF Data transceiver (ODU) in the
form x, where:
0=Disabled
1=Enabled
Example: ODU=0 (selects Disabled)
D–33
Query
(Instruction &
Qualifier)
RNN?
Response to
Query
RNN=[CR]AA.ABB.
BC.CD.DEE.E,FF.F
ddmmyyhhmmss[C
R]AA.ABB.BC.CD.D
EE.E,FF.Fddmmyyh
hmmss[CR]AA.ABB.
BC.CD.DEE.E,FF.F
ddmmyyhhmmss[C
R]AA.ABB.BC.CD.D
EE.E,FF.Fddmmyyh
hmmss[CR]AA.ABB.
BC.CD.DEE.E,FF.F
ddmmyyhhmmss
(see Description of
Arguments)
CAS=
CAS?
CAS*
CAS#
N/A
N/A
ISP=
ISP#
N/A
N/A
FSW=
FSW*
N/A
N/A
ODU=
ODU?
ODU*
ODU#
ODU?
ODU=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
1:N (One For
N) control
Command
(Instruction
& Qualifier)
OFN=
Number of
Arguments
1 byte, 0 or 1
IP Address
IPA=
18 bytes
numerical
IP Gateway
IPG=
15 bytes
numerical
Traffic IP
Address
IPT=
18 bytes
numerical
MAC Address N/A
12 bytes,
alphanumerical
Revision 15
MN-CDM625
Description of Arguments
Command or Query.
Enables or disables the 1:N control. This affects a control line on the 25-pin rear panel connector. This must
be enabled when the modem is attached to a CRS-300 1:N Controller or a CRS-500 1:N Switch in the form
x, where:
0=Disabled
1=Enabled
Example: OFN=0 (selects Disabled)
Command or Query.
Used to set the IP Address and network prefix for the 10/100 Base T Ethernet management port, in the form
aaa.bbb.ccc.ddd.yy, where permitted ranges are:
aaa = 0-223
bbb = 0-255
ccc = 0-255
ddd = 001-255
yy=08-30
Example: IPA=010.006.030.001.24
Command or Query.
Used to set the IP Gateway Address for the Ethernet management port, in the form aaa.bbb.ccc.ddd, where
permitted ranges are:
aaa = 0-223
bbb = 0-255
ccc = 0-255
ddd = 001-255
Example: IPG=010.006.030.001
Command or Query.
In a 1:1 system, each modem has its own unique IP address that would be used by an external M&C
application to address each modem. The IP traffic uses a different address, and whichever modem is
online, uses this address for the IP traffic in the form aaa.bbb.ccc.ddd.yy where permitted ranges are:
aaa = 0-223
bbb = 0-255
ccc = 0-255
ddd = 001-255.
yy is the Subnet Mask Length (range: 08 to 30)
Example: IPT=010.006.030.002.24
Query only.
Used to query the unique MAC Address for the modem.
Example: MAC=0006B00001C2
D–34
Response to
Command
OFN=
OFN?
OFN*
OFN#
Query
(Instruction &
Qualifier)
OFN?
Response to
Query
OFN=x
(see Description of
Arguments)
IPA=
IPA?
IPA*
IPA#
IPA?
IPA=
aaa.bbb.ccc.ddd.yy
(see Description of
Arguments)
IPG=
IPG?
IPG*
IPG#
IPG?
IPG=
aaa.bbb.ccc.ddd
(see Description of
Arguments)
IPT=
IPT?
IPT*
IPT#
IPT?
IPT=
aaa.bbb.ccc.ddd.yy
(see Description of
Arguments)
N/A
MAC?
MAC=aabbccddeeff
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Request to
Send
Command
(Instruction
& Qualifier)
RTS=
HSSI
Handshake
Control
HHC=
POCO
feature
(Power-On
Carrier-Off)
PCO=
DoubleTalk
CNM=
Carrier-inCarrier (CnC)
Mode
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
1 byte, value of Command or Query.
0, 1, 2
Defines how RTS/CTS will operate at the main data interface in the form x, where:
0=RTS/CTS Loop, No Action. RTS and CTS are looped, so that CTS echoes the state of RTS, but RTS
does not control the ON/OFF state of carrier.
1=Loop, RTS Controls TX O/P. RTS and CTS are looped, so that CTS echoes the state of RTS and
RTS controls the ON/OFF state of carrier (in order words, the modem will not bring up its TX carrier
until RTS is asserted.
2=Ignore RTS, Assert CTS.
Example: RTS=0 (RTS/CTS Loop, No Action)
1 byte, value of Command or Query. (HSSI parameter)
0,1
Defines TA/CA control of the HSSI interface in the form x, where:
0 = TA to CA loop (default)
1 = RR control CA, TA control Tx output.
Example: HHC=0 (TA to CA loop)
1 byte, value of Command or Query.
0,1
Use with caution.
If enabled, when a modem is power cycled, it will power up with the Tx carrier setting OFF.
0=POCO disabled (normal operation)
1=POCO enabled – care!
Example: PCO=0 (disabled – normal operation)
1 byte, value of Command or Query.
0 to 9
CnC enable in the form x, where:
0=Off
1=On (normal)
2=APC, C-Band, Side A
3=APC, X-Band, Side A
4=APC, Ku-Band, Side A
5=APC, Ka-Band, Side A
6=APC, C-Band, Side B
7=APC, X-Band, Side B
8=APC, Ku-Band, Side B
9=APC, Ka-Band, Side B
Notes:
1. CnC may be enabled only if:
• The optional plug-in hardware CnC card has been installed AND a CnC FAST option is unlocked.
• The range of permitted data rates is controlled by a FAST feature code. (Read EID to decode the
installed options for the modem)
2. If CnC-APC is active (APS=22), key transmission/reception (Modulation, FEC type, Code Rate,
Framing, Data Rate, Interface) cannot be modified until CnC-APC is suspended. (Use APC
command to suspend or activate.)
D–35
Response to
Command
RTS=
RTS?
RTS*
RTS#
Query
(Instruction &
Qualifier)
RTS?
Response to
Query
RTS=x
(see Description of
Arguments)
HHC=
HHC?
HHC*
HHC#
HHC?
HHC=x
(see Description of
Arguments)
PCO=
PCO?
PCO*
PCO#
PCO?
PCO=x
(see Description of
Arguments)
CNM=
CNM?
CNM*
CNM#
CNM?
CNM=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
DoubleTalk
Carrier-inCarrier (CnC)
PMSI Mode
CnC
Frequency
Range/offset
Command
(Instruction
& Qualifier)
CPM=
CCF=
CnC
CSD=
Min/Max
Search Delay
G.703 Clock
Extension
CEX=
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
1 byte, value of Command or Query. (CnC parameter)
0 to 3
CnC PMSI (Pre-Mapped-Symbol Interface) mode in the form x, where:
0=Idle
1=Redundancy (1:1 or 1:N)
2=Talk
3=Listen
3 bytes
Command or Query. (CnC parameter)
The maximum value that may be entered, in the form xxx, as the CnC Sweep frequency range depends on
the Rx symbol rate as follows:
18ksps to 64ksps: ± 1 to the symbol rate (ksps)/2
64ksps to 389ksps: ± 1 to 32 kHz
389ksps to 2000ksps: ± 1 to 10% of sym rate
>2000ksps:
± 1 to 200 kHz
Example: CCF=030
6 bytes
Command or Query. (CnC parameter)
CnC min/max delay value in milliseconds, in the form xxxyyy, where:
xxx=minimum delay
yyy=maximum delay
Maximum allowable value is 330ms
Example: CSD=010325
2 bytes
Command or Query. (FAST option)
G.703 Clock Extension in the form ab, where:
a = G.703 Clock Extension Mode
0 = None
1 = TxLock
2 = RxEnable
b = G.703 Clock Extension Interface
0 = T1
1 = E1Bal
2 = E1Unbal
Example: CEX=12 (Sets Tx Lock to E1 Unbalanced)
Notes:
1. Not all CEX modes are valid all the time.
2. For argument a:
If Data Interface (ITF) is G.703, only 0=None is allowed.
If Tx clock (TCK) is not Internal, 1=TxLock is not allowed.
D–36
Response to
Command
CPM=
CPM?
CPM*
CPM#
Query
(Instruction &
Qualifier)
CPM?
Response to
Query
CPM=x
(see Description of
Arguments)
CCF=
CCF?
CCF*
CCF#
CCF?
CCF=xxx
(see Description of
Arguments)
CSD=
CSD?
CSD*
CSD#
CSD?
CSD=xxxyyy
(see Description of
Arguments)
CEX=
CEX?
CEX*
CEX#
CEX?
CEX=ab
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Tx BERT
State
Command
(Instruction
& Qualifier)
BTX=
Rx BERT
State
BRX=
Tx BERT
Pattern
TBP=
Rx BERT
Pattern
RBP=
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
1 byte, value of Command or Query.
0 or 1
Tx BERT State in the form x, where:
0 = Off
1 = On
Example: BTX=1 (Tx BERT On)
1 byte, value of Command or Query.
0 or 1
Rx BERT State in the form x, where:
0 = Off
1 = On
Example: BRX=1 (Rx BERT On)
1 byte
Command or Query.
Tx BERT Pattern, in the form x, where:
0=space
1=mark
2=1:1
3=1:2
4=63
5=511
6=2047 (default)
7=2047R (or 2047 Alternate)
8=Mil-188
9=2^15-1
A=2^20-1
B=2^23-1
Example: TBP=6 (Tx BERT Pattern is 2047)
1 byte
Command or Query.
Rx BERT Pattern, in the form x, where:
0=space
1=mark
2=1:1
3=1:2
4=63
5=511
6=2047 (default)
7=2047R (or 2047 Alternate)
8=Mil-188
9=2^15-1
A=2^20-1
B=2^23-1
Example: RBP=6 (Rx BERT Pattern is 2047)
Response to
Command
BTX=
BTX?
BTX#
D–37
Query
(Instruction &
Qualifier)
BTX?
Response to
Query
BTX=x
(see Description of
Arguments)
BRX=
BRX?
BRX#
BRX?
BRX=x
(see Description of
Arguments)
TBP=
TBP?
TBP#
TBP?
TBP=x
(see Description of
Arguments)
RBP=
RBP?
RBP#
RBP?
RBP=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
BERT 10E-3
Error Insert
Command
(Instruction
& Qualifier)
BKE=
BERT Restart BRM=
Monitor
BERT Result
in bit errors
BERT Result
in average
BER
N/A
ACM
parameters
ACM=
Forced
Reboot
FRB=
Carrier ID
CAI=
N/A
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
1 byte, value of Command or Query.
0 or 1
Inserts 10E-3 BER in the form x, where:
x = 0 (Off) or 1 (On)
Example: BKE=1
None
Command only.
Example: BRM=
Note: This command takes no arguments.
7 bytes,
Query only.
numeric
BERT monitor results in bit errors. If bit errors exceed 9999999, then BRE=9999999.
6 bytes
Query only
Returns the value of the average BER in the form a.b x 10-c. First 3 bytes are the value. Byte 5 is the
exponent. Last byte is the indicator of Sync Loss. A ‘*’ in last byte means there was a loss of pattern
synchronization since last restart, but now is synchronized. A ‘_’ (space) in last byte means pattern
synchronization is achieved.
Returns 999999 if there’s no sync in BERT monitor.
Example 1: BRR=2.8E7 (BER is 2.8 x 10-7, and in sync)
Example 2: BRR=3.4E5* (BER is 3.4 x 10-5, and there was a Sync Loss)
4 bytes
Command or Query.
Defines ACM operating parameters in the form mMAT, where:
m=Minimum ModCod, range is 0 to 9, and A (for ModCod=10) or B (for ModeCod=11)
M=Maximum ModCod, range is 0 to 9, and A (for ModCod=10) or B (for ModeCod=11)
A= Defines action on remote demod unlock (0=go to minimum Tx ModCod, 1=maintain Tx ModCod)
T=Target Eb/No Margin, from 0 to 9 that is two times of the Eb/No in dB (from 0.0dB to 4.5dB).
Example: ACM=0B12
(Sets min ModCod=0, max ModCod=11, maintain Tx ModCod when remote demod unlocks,
sets Target Eb/No at 1.0dB.)
None
Command only.
Force a hard reset of the unit in 5 seconds.
1 byte, value
of 0 thru 1
Command or Query.
Carrier ID Enable/Disable in the form x, where:
0 = Disabled
1 = Enabled
D–38
Response to
Command
BKE=
BKE?
BKE#
Query
(Instruction &
Qualifier)
BKE?
Response to
Query
BKE=x
(see Description of
Arguments)
BRM=
N/A
N/A
N/A
BRE?
BRE=xxxxxxx
N/A
BRR?
BRR=a.bEcx
ACM=
ACM?
ACM#
ACM?
ACM=mMAT
(see Description of
Arguments)
FRB=
FRB?
FRB*
FRB#
CAI=
CAI?
CAI *
CAI #
N/A
N/A
CAI?
CAI =x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Demo Time
Remaining
Command
(Instruction
& Qualifier)
N/A
Number of
Arguments
6 bytes
Demo Mode
DMM=
1 byte, value
of 0 thru 2
MediumEarth Orbit
MEO=
1 byte
Antenna
Handover
AHO=
1 byte
Antenna
Handover
Mode
AHM=
1 byte
Antenna
Handover
Differential
Path Delay
AHD=
3 bytes
Time Protocol TPE=
Enable
1 byte
Revision 15
MN-CDM625
Description of Arguments
Query only.
Demo time remaining in the form ddhhmm,
dd = days (00 to 30)
hh = hours (00 to 23)
mm = minutes (00 to 59)
Example: DMT=032312 (3 days 23 hours 12 minutes)
Command or Query.
Demo Mode Enable/Disable in the form x, where:
0 = Disabled
1 = Enabled
2 = Expired
Command or Query.
Medium Earth Orbit Enable/Disable in the form x, where:
0 = Disabled
1 = Enabled
Command or Query.
Antenna Handover Enable/Disable in the form x, where:
0 = Disabled
1 = Enabled
Command or Query.
Antenna Handover Mode in the form x, where:
0 = Manual
1 = Auto
Command or Query.
Differential Path Delayin the form +xx (-13 to +13)
Example: AHD=+12 (Lead 12)
AHD=-03
(Lag 3)
Command or Query.
Used to disable or enable the Time Protocol, where:
0 = Time Protocol disabled
1 = Time Protocol enabled
Example: TPE=1 (Time protocol enabled)
D–39
Response to
Command
N/A
Query
(Instruction &
Qualifier)
DMT?
Response to
Query
DMT=ddhhmm
(see Description of
Arguments)
DMM=
DMM?
DMM*
DMM#
DMM?
DMM=x
(see Description of
Arguments)
MEO=
MEO?
MEO=x
(see Description
of Arguments)
AHO=
AHO?
AHO=x
(see Description of
Arguments)
AHM=
AHM?
AHM=x
(see Description of
Arguments)
AHD=
AHD?
AHD=xx
(see Description of
Arguments)
TPE=
TPE?
TPE?
TPE=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Primary
Ethernet
Time Server
Backup
Ethernet
Time Server
Command
(Instruction
& Qualifier)
TPS=
15 bytes
TPB=
15 bytes
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
Command or Query.
Used to set the Primary Ethernet Time Server IP address for the Unit. Tx Ethernet management port, in the
format:
xxx.xxx.xxx.xxx, where:
xxx.xxx.xxx.xxx is the Time server IP address
Example: TPS = 192.168.001.005
Command or Query.
Used to set the Backup Ethernet Time Server IP address for the Unit. Tx Ethernet management port, in the
format:
xxx.xxx.xxx.xxx, where:
xxx.xxx.xxx.xxx is the Time server IP address
Example: TPB = 192.168.001.005
D–40
Response to
Command
TPS=
TPS?
TPB=
TPB?
Query
(Instruction &
Qualifier)
TPS?
TPB?
Response to
Query
TPS=
xxx.xxx.xxx.xxx
(see Description of
Arguments)
TPB=
xxx.xxx.xxx.xxx
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
D.5.5
Revision 15
MN-CDM625
Bulk Configuration Strings
Note: In order to completely get/set the configuration of the modem, the following commands must be queried/set:
• MGC
• OGC (L-Band Only)
• Drop and Insert (specified in MGC):
o DNI (Open Network DNI);
o DIC (Closed Network DNI++);
o QDI (Quad DNI), one for each active port up to a maximum of four.
Parameter
Type
Global
Configuration
Command
(Instruction
& Qualifier)
MGC=
Number of
Arguments
224 bytes,
numerical
entries, fixed
values and
delimiters
Response to
Command
Description of Arguments
Command or Query.
Global Configuration of CDM625, in the form shown in the Response to Query column (to right) where:
* FFFF.FFFF=Tx Frequency
DDDDD.DDD=TX Data Rate
G=Tx FEC Type
Y=Tx Reed-Solomon Type
R=Tx FEC Rate
M=Tx Modulation Type
V=Tx Spectrum Inversion
S=Tx Scrambler State
PP.P Tx Power Level
B=AUPC Enable
aaa.aa=AUPC Parameter Setup
C=Tx Clock Source
X=Tx Carrier State
I=Tx Interface Type
K=Tx Ternary Code
N=Tx Framing Mode
* Z=Tx Clock Invert
* ffff.ffff=Rx Frequency
ddddd.ddd=Rx Data Rate
g=Rx FEC Type
y=Rx Reed-Solomon Type
r=Rx FEC Rate
m=Rx Modulation Type
v=Rx Spectrum Inversion
s=Rx Scrambler State
* www=Rx Sweep Width
c=Rx Clock Source
ll.l=Eb/No Alarm Point
bbbbb=Rx Buffer Size
i=Rx Interface Type
k=Rx Ternary Code
same as TFQ
same as TDR
same as TFT
same as TRS
same as TCR
same as TMD
same as TSI
same as TSC
same as TPL
same as AUP
same as APP
same as TCK
same as TXO
same as TIT
same as TTC
same as TFM
same as TCI
same as RFQ
same as RDR
same as RFT
same as RRS
same as RCR
same as RMD
same as RSI
same as RDS
same as RSW
same as RCK
same as EBA
same as RBS
same as RIT
same as RTC
D–41
MGC=
MGC?
MGC*
MGC#
Query
(Instruction &
Qualifier)
MGC?
MGC?n (where
n = 0 to 9.
Returns the
MGC portion of
1 of 10 stored
configurations)
Response to
Query
MGC=FFFF.FFFFD
DDDD.DDDGYRMV
SPP.PBaaa.aaCXIK
NZffff.ffffddddd.dddg
yrmvswwwcll.lbbbbb
iknzOEEEETeeeee
eeeeeeeeWALQUH
HHHhhhhJJJJjjjjabc
defxxxxxxxxxxrrrrr.rr
rsssss.ssshgkpmnn
nttuuu.uuu.uuu.uuu.
uuvvv.vvv.vvv.vvvx
GHIJKwAAABBBC
CCeexEFGGGH
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
…Global
Configuration
(cont.)
Command
(Instruction
& Qualifier)
Number of
Arguments
Revision 15
MN-CDM625
Response to
Command
Description of Arguments
n=Rx Framing Mode
* z=Rx Clock Invert
* O=EDMAC mode
* EEEE=EDMAC Address
T=Unit Test Mode
* eeeeeeeeeeeee=Unit Alarm Mask
W=Hi-Stab Reference choice
A=Statistics Sampling Interval
L=Rx Terrestrial Alarm Enable
Q=Tx Terrestrial Alarm Enable
U=ODU Common Enable
HHHH=Tx Backward Alarm
hhhh=Rx Backward Alarm
JJJJ=Tx Audio Volume
jjjj= Rx Audio Volume
a=Drop Type
b=Insert Type
c=Tx ESC Type
d=Rx ESC Type
e=Tx Data Invert
f=Rx Data Invert
* A=Tx Sub-Mux on/off
* B=Rx Sub-Mux on/off
* CC=Tx Sub-Mux Ratio
* DD=RX Sub-Mux Ratio
* mMAT
* rrrrr.rrr=TX Symbol Rate
* sssss.sss=RX Symbol Rate
* h=HSSI handshake control
* g=RTS/CTS setting
k=Rx Equalizer Enable
p=Power-On/Carrier-Off Enable
m=ESC enable
nnn=ESC parameters
tt=G.703 Clock Extension
* uuu.uuu.uuu.uuu.uu=IP address
* vvv.vvv.vvv.vvv=IP gateway address
*w
* G=Tx BERT State
* H=Tx BERT Pattern
* I=BERT 10E-3 Error Insert
* J=Rx BERT State
* K=Rx BERT Pattern
* w=CnC mode
* AAA=CnC frequency offset
BBBCCC=CnC search delays
D=CnC PMSI mode
same as RFM
same as RCI
same as EFM
same as ESA
same as TST
same as MSK
same as EFR
same as SSI
same as RTE
same as TTA
same as ODU
same as TBA
same as RBA
same as TVL
same as RVL
same as DTY
same as ITY
same as TET
same as RET
same as TDI
same as RDI
same as TMX
same as RMX
same as TMR
same as RMR
same as ACM
same as TSR
same as RSR
same as HHC
same as RTS
same as REE
same as PCO
same as ESC
same as SCP
same as CEX
same as IPA
same as IPG
same as TXA
same as BTX
same as TBP
same as BKE
same as BRX
same as RBP
same as CNM
same as CCF
same as CSD
same as CPM
D–42
Query
(Instruction &
Qualifier)
Response to
Query
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
OGC=
50 Bytes
Response to
Command
Description of Arguments
ee=Compressed Ethernet port speed
E=Attach summary BUC alarm to Tx
F=Attach summary LNB alarm to Rx
GGG=WAN buffer length
H=Dedicated Management Port
…Global
Configuration
(cont.)
OGC Outdoor
Unit Global
Copy
Revision 15
MN-CDM625
Query
(Instruction &
Qualifier)
Response to
Query
see **
same as ABA
same as ALA
same as WBL
same as DMP
Note: Much of the 625 MGC format has been kept similar to the 600/L MGC format.
* indicates differences.
** Ethernet port speed is compressed from 4 bytes in SEC command to 2 bytes in MGC. First byte
represents speed settings for Port 1 and Port 2, second byte represents speed settings for Port 3 and Port
4. In each byte, character A through Y is used to represent 25 possible combinations of two port speed.
A=00, B=01, C=02, D=03, E=04, F=10, G=11, H=12, I=13, J=14, K=20, L=21, M=22, N=23, O=24, P=30,
Q=31, R=32, S=33, T=34, U=40, V=41, W=42, X=43, Y=44.
Example: BN is converted to 0123, that means Port 1 is AutoNeg, Port 2 is 100Full, Port 3 is 100Half, Port
4 is 10Full.
Command or Query.
ODU Global Configuration of CDM-625, in the form shown in the Response to Query column (to the right), where:
aa=BUC Address
same as BAD
b=BUC Tx Output Enable
same as BOE
* x (spare)
d=BUC Power Supply
same as BPS
e=BUC 10MHz Reference State
same as BFR
xxxxx (spares)
gggg=BUC Current - Low Limit
same as BCL
hhhh=BUC Current - High Limit
same as BCH
* xxxx (spares)
* i=LNB Power Supply
same as LPS
* x (spare)
k=LNB 10MHz Reference
same as LNR
lll=LNB Low Alarm Limit
same as LNL
nnn=LNB High Alarm Limit
same as LNH
FFFFFS=TX LO Frequency
same as TLO
fffffs=RX LO Frequency
same as RLO
xxxxxx (spares)
Notes:
1. Much of the 625 OGC format has been kept similar to the CDM-600L OGC format (* indicates the
differences). In 600L Emulation Mode, OGC follows the CDM-600L’s OGC format.
2. Any unavailable parameters will be filled with x’s.
D–43
OGC=
OGC?
OGC*
OGC#
OGC?
OGC?n (where n
= 0 to 9. Returns
the OGC portion
of 1 of 10 stored
configurations)
OGC=aabxdexxxxxg
ggghhhhxxxxixklllnn
nFFFFFSfffffsxxxxxx
(Returns current
OGC Configuration)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Drop & Insert
Drop & Insert
Configuration
(31 channels)
Command
(Instruction
& Qualifier)
DNI=
DIC=
Number of
Arguments
51 bytes
67 bytes
Revision 15
MN-CDM625
Description of Arguments
Command or Query. (D&I only)
25 bytes of Drop information:
d= 24 channels (bytes) defining Timeslot locations
t= Drop type:
0=T1-D4, 1=T1-ESF, 2=E1-CCS, 3=E1-CAS, as DTY
25 bytes of Insert information:
i= 24 channels (bytes) defining Timeslot location
T= Insert type:
0=T1-D4, 1=T1-ESF, 2=E1-CCS, 3=E1-CAS) as ITY
Each Timeslot definition:
0= Unused
1-9 for timeslots 1–9, A=10, B=11, C=12, D=13…V=31.
z=timeslot zero
L= D&I Internal Loop
0 = OFF, 1 = ON
Example: DNI=123456789ABC0000000000003123456789ABC00000000000031
Drop channels 1–12 using timeslots 1–12, and unused channels 13–24. Same for Insert. E1-CAS, D&I types,
Internal Loop ON.
If framing is D&I and data rate is 1920 kbps and DNI Type is E1-CCS or E1-CAS, then channels cannot be
programmed (i.e. FIXED CHANNEL MODE).The DNI? response will display all ‘x’ in the time-slot positions.
Command or Query. (D&I++ only)
(Not available in 600/L Emulation mode)
31 channels of Drop Timeslot information: xx= spares
31 channels of Insert Timeslot information: xx= spares
Each Timeslot definition:
0= Unused
1-9 for timeslots 1–9,
A=10,
B=11,
C=12,
D=13, etc ………..V=31,
z=timeslot zero
L= D&I Internal Loop
0 = OFF, 1 = ON
Example:
DIC=123456789ABCDEFGHIJKLMNOPQRSTUVxx123456789ABCDEFGHIJKLMNOPQRSTUVxx0
Drop channels 1–32 using timeslots 1–31 and timeslot zero. Same for Insert. E1-CCS, Internal Loop Off.
D–44
Response to
Command
DNI=
DNI?
DNI*
DNI#
DIC=
DIC?
DIC*
DIC#
Query
(Instruction &
Qualifier)
DNI?
DNI?n
(where n = 0 to 9.
Returns the DNI
portion of 1 of 10
stored
configurations)
Response to
Query
DNI=dddddddddddd
ddddddddddddtiiiiiiiiiii
iiiiiiiiiiiiiTL
(see Description of
Arguments)
(Returns current D&I
Configuration)
DIC?
DIC=dddddddddddd
dddddddddddddddd
dddxxsssssssssssss
ssssssssssssssssss
xxL
(see Description of
Arguments)
DIC?n
Returns current DIC
Configuration,
where:
n = 0 to 9.
Returns the DIC
portion of 1 of 10
stored
configurations
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Quad Drop &
Insert
Command
(Instruction
& Qualifier)
QDI=
Number of
Arguments
73 bytes
Revision 15
MN-CDM625
Description of Arguments
Command or Query.
Quad Drop & Insert Commands (E1 CCS Only)
QDI=pccddddddddddddddddddddddddddddddddCCssssssssssssssssssssssssssssssssmrrr, where:
p = Port number 1 thru 4
cc = Number of Drop Channels, 0-32.
Used to decide Port p’s TX Tributary Rate if Interface Type is Quad Drop & Insert (TFM=8).
d = 32 bytes defining Timeslot locations (or channels)
CC = Number of Insert Channels, 0-32.
Used to decide Port p’s RX Tributary Rate if Interface Type is Quad Drop & Insert (RFM=8).
s = 32 bytes defining Timeslot locations (or channels)
Timeslot definition:
0 = Unused
1-9 for timeslots 1–9,
A=10, B=11, C=12, D=13…V=31
z=timeslot zero
m = E1 Clock Sync/Async mode (Read/Write on Port 1 string, Read-Only on other Ports strings). This is
NOT a per port setting, but a global setting. 0=E1's are asynchronous, 1=E1's are synchronous.
Query
(Instruction &
Qualifier)
QDI?p
QDI?pn
(where n = 0 to 9
returns the QDI
portion of 1 of 10
stored
configurations for
a single port p)
QDI=pccddddddddd
dddddddddddddddd
dddddddCCssssssss
ssssssssssssssssss
ssssssmrrr
CST=
CST?
CST*
CST#
N/A
N/A
CLD=
CLD?
CLD*
CLD#
N/A
N/A
Response to
Command
QDI=
QDI?
QDI*
QDI#
Response to
Query
(Returns current
Quad D&I
configuration of a
single port p)
r = reserved (set to value 0)
Example 1:
131123456789ABCDEFGHIJKLMNOPQRSTUV031123456789ABCDEFGHIJKLMNOPQRSTUV00000
Port 1’s Drop channels 1–31 using timeslots 1–31. Same for Insert. E1 clock mode is synchronous (ReadWrite using Port 1 string).
Example 2:
30412340000000000000000000000000000204123400000000000000000000000000002001000
Port 3’s Drop channels 1–4 using timeslots 1–4. Same for Insert. E1 clock mode is asynchronous (Readonly parameter in Port 3 string).
Configuration
Save
CST=
1 byte, value
of 0 thru 9
Configuration
Load
CLD=
1 byte, value
of 0 thru 9
Note: This command is a bit forgiving in the sense that the modem accepts the command even though the
interface type is other than Quad Drop & Insert. This is intentional for use with the CRS-300 switch for 1:N
redundancy.
Command only.
Causes the modem to store the current modem configuration in Configuration Memory location in the form
x, where x=0 to 9.
Example: CST=4 (stores the current configuration in location 4)
Command only.
Causes the modem to retrieve a previously stored modem configuration from Configuration Memory location in the
form x, where x=0 to 9
Example: CLD=4 (loads modem configuration from location 4 to be the active configuration)
D–45
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Bulk Status
Query
Command
(Instruction
& Qualifier)
N/A
Number of
Arguments
29 bytes
Exception –
600 or 600L
Emulation:
28 chars, as
RFO is
different
Revision 15
MN-CDM625
Description of Arguments
Response to
Command
Query only.
N/A
Response has the form abcccc,ddddd,eeffffffggggghhh, where:
a = LRS? response
b = RED? response
cccc = EBN? response
ddddd = BER? response
eeeee = BFS? Response
* ffffff = RFO? response
ggggg = RSL? response
hhh = TMP? response
This command is intended to reduce the need for excessively frequent queries to a modem, and will be useful
for a unit in a redundancy system, where the redundancy system has monitoring of its own occurring. The latter
6 parameters are only updated once per second.
D–46
Query
(Instruction &
Qualifier)
BSQ?
Response to
Query
BSQ=abcccc,ddddd,
eeffffffggggghhh
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
D.5.6
Modem Information
Command
(Instruction
& Qualifier)
N/A
4 bytes
Software
Revision
N/A
5 bytes
Firmware
Information
N/A
256 bytes
Serial Number
N/A
9 bytes
Fractional CnC N/A
90-day
Counter
7 bytes
Modem
Operational
Full Year
Counter
N/A
8 bytes
Software
Revision 2
N/A
38 bytes
Parameter
Type
Hardware
Revision
Revision 15
MN-CDM625
Number of
Arguments
Description of Arguments
Query only.
Unit returns hardware revision level of both main circuit cards, in the form xx.y, where:
xx indicates the main (bottom) card;
y indicates the top (modem) card.
Query only.
Unit returns the value of the internal software revision installed in the unit, in the form of x.x.x
Example: SWR=2.0.2
Query only.
Unit returns firmware information.
B requests boot code information
Example: FRW=Boot: FW/12865-1-,1.1.1,04/01/07
Otherwise, FRW returns firmware information for Image 1 or 2:
Example: FRW=1
FW/12864-,1.1.1,04/01/07
FW/12866-,1.1.1,04/01/07
FW/12867-,1.1.1,04/01/07
FW/12868-,1.1.1,04/01/07
FW/12875-,1.1.1,04/01/07
FW/12874-,1.1.1,04/01/07
Query only.
Indicates the modem 9-digit serial number.
Example: SNO=176500143
Query Only.
Returns the number of seconds that Fractional CnC license has been used in 1 year period since the last
time the CnC counter was reset to 0.
Example: FCC=0000455 (indicating 455 seconds)
Query Only.
Returns the number of seconds that the unit has been powered on since last reset of the counter.
The counter resets to 0 when it reaches 31536000 seconds (seconds in 365 days).
Example: FCF=00001342 (indicating 1342 seconds)
Query only.
Unit returns the value of the internal software revision installed in the unit,
Example: SW2=Boot:2.1.1 Bulk1*:2.1.2 Bulk2 :2.1.1
The current active image is indicated with an asterisk.
D–47
N/A
Query
(Instruction &
Qualifier)
HRV?
N/A
SWR?
SWR=x.x.x
(see description
of arguments)
N/A
FRW?B
FRW?1
FRW?2
FRW=xxx…xxx
(see Description of
Arguments)
N/A
SNO?
SNO=xxxxxxxxx
(see Description of
Arguments)
N/A
FCC?
FCC=xxxxxxx
(see Description of
Arguments)
N/A
FCF?
FCF=xxxxxxxx
(see Description of
Arguments)
N/A
SW2?
SW2=x
(see Description
of Arguments)
Response to
Command
Response to
Query
HRV=xx.y
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Equipment ID
Command
(Instruction
& Qualifier)
N/A
Number of
Arguments
33 bytes
Revision 15
MN-CDM625
Description of Arguments
Query only.
Unit returns the equipment ID and installed options in the form AAAABCDEFGHsJKLMNPQRSTUVWXYssssss, where:
AAAA=0625 , the modem model number
Installed hardware:
B=Slot 1: TPC/LDPC codec
0 = not present, 1=present
C=Slot 2: DoubleTalk Carrier-in-Carrier board (CnC)
0 = not present, 1=present
D=Slot 3: VersaFEC board
0 = not present, 1=present,
E=Slot 4: Network Processor card
0 = not present, 1=present
F=Slot 5: RAN Optimization card
0 = not present, 1=present
G=External 20dB attenuator
0 = not present, 1=present
H=Audio chips
0=not present, 1=present
s=spares (0)
Software FAST options:
J=Frequency option
0=70/140MHz, 1= 70/140MHz & L-Band
K=Modulation option
0=Standard: BPSK, QPSK, OQPSK.
1=Option 0 plus 8-PSK and 8-QAM
2=Option 0 plus 16-QAM
3=Option 1 and option 2
L=Data Rate option
M=TPC/LDPC data rate option
For L and M, the value is decoded:
0=Base, up to 5Mbps
1=up to 10Mbps
2=up to 15 Mbps
3=up to 20Mbps
4=up to 25Mbps
N=CnC data rate option, where
0=No CnC FAST installed
1=up to 512kbps
2=up to 1.1Mbps
3=up to 2.5 Mbps
4=up to 5 Mbps
5=up to 10 Mbps
6=up to 15 Mbps
7=up to 20 Mbps
8=up to 25 Mbps
P=VersaFEC CCM data rate option, where
0=Base, up to 1.1Mbps
1=up to 2.5Mbps
2=up to 5 Mbps
3=up to 16Mbps
D–48
Response to
Command
N/A
Query
(Instruction &
Qualifier)
EID?
Response to
Query
EID=AAAABCDEFGHsJ
KLMNPQRSTUVWXYZa
ssss
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
…Equipment ID
(cont)
Command
(Instruction
& Qualifier)
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
Q=IP-ACM symbol rate option, where
0=None
1=up to 300ksym/sec
2=up to 1200ksym/sec
3=up to 4100ksym/sec
R=Framing option
0=Standard: (Unframed, EDMAC, EDMAC2)
1 = Option 0 plus Open Network (IBS with hi-rate ESC, IDR, Audio)
S=D&I option
0=None
1=D&I,D&I++ for single port E1/T1
2=Option 1 plus Quad D&I (4 ports)
T= G.703 Clock Extension
0=Not installed, 1=installed on
U=Time based CnC option
0=Not installed
1=Fractional CnC installed
2=Time Limited CnC installed
3=Option 1 and Option 2
V=Header Compression
0=None
1=up to 5Mbps / 1200ksps (ACM)
2=up to 10Mbps / 4100ksps (ACM)
3=up to 15Mbps / 4100ksps (ACM)
4=up to 20Mbps / 4100ksps (ACM)
5=up to 25Mbps / 4100ksps (ACM)
W=Payload Compression
0=None
1=up to 5Mbps / 1200ksps (ACM)
2=up to 10Mbps / 4100ksps (ACM)
3=up to 15Mbps / 4100ksps (ACM)
4=up to 20Mbps / 4100ksps (ACM)
5=up to 25Mbps / 4100ksps (ACM)
X=Advanced QoS
0=Not installed, 1=Installed
Y=AES Encryption
0=Not installed
1=Installed
Z= Advanced Network Timing
0=Not installed
1=Installed
a= Carrier ID
0=Not installed
1=Installed
ssss = spares (0)
600/L Emulation: See CDM-600/600L manual
Example: EID=062510000000134473412113233000000 indicates all software options, TPC/LDPC card installed.
Note: To achieve LDPC or TPC to 25 Mbps, the modem will require:
• Hardware option B, slot 1, a TPC/LDPC Codec;
• Software options: L: data rate FAST option to 25 Mbps AND M:TPC/LDPC data rate FAST option to 25 Mbps.
D–49
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
CDM-625 Advanced Satellite Modem
Appendix D
D.5.7
Modem Performance Information
Command
(Instruction
& Qualifier)
N/A
5 bytes
Rx Frequency
Offset
N/A
6 bytes
Buffer Fill
State
N/A
2 bytes
Rx BER
N/A
5 bytes
Rx Eb/No
N/A
4 bytes
Redundancy
State
N/A
1 byte, 0 or 1
Temperature
N/A
3 bytes
Parameter
Type
Rx Signal
Level
Revision 15
MN-CDM625
Number of
Arguments
Exception –
600L
Emulation:
5 bytes
Description of Arguments
Query Only.
Unit returns the value of the Rx signal level, in dBm, between –20 and –90 dBm.
If >-20dBm, returns RSL=GT-20 (GT = ‘greater than’)
If <-90 dBm, returns RSL=LT-90 (LT = ‘less than’)
If in the range of –20 to –90dBm,
returns RSL=-xx.y (resolution 0.5dB)
Example: RSL=-45.5 (indicating –45.5 dBm)
Query only.
Unit returns the value of the measured frequency offset of the carrier being demodulated.
Values range from ± 0 to ± 200 kHz, 100 Hz resolution.
Returns 999999 if the demodulator is unlocked.
The maximum Rx Frequency Offset corresponds to the Receive Sweep Width (RSW)
Example: RFO=+002.3 (selects + 2.3 kHz)
Query only.
Unit returns the value of the buffer fill state, between 1 and 99%. Returns 00 if demodulator is unlocked.
Example: BFS=33 (selects 33%)
Query only.
Units returns the value of the estimated corrected BER in the form a.bx10-3, where:
First three bytes are the value.
Last two bytes are the exponent.
Returns 99999 if the demodulator is unlocked or BER data is unavailable.
Example: BER=4.8E3 (selects BER=4.8 x 10-3)
Query only.
Unit returns the value of Eb/No, between 0 to 16 dB. Format xx.x, resolution 0.1 dB.
Returns 99.9 if demod is unlocked.
Returns +016 for values greater than 16.0 dB.
Example: EBN=12.3 (selects Eb/No = 12.3 dB)
Query only.
Unit returns the redundancy state of the unit in the form x, where:
0=Offline
1=Online
Example: RED=1 (selects Online)
Query only.
Unit returns the value of the internal temperature sensor (degrees C) in the form xxx, where:
Example: TMP=+26
D–50
N/A
Query
(Instruction &
Qualifier)
RSL?
N/A
RFO?
RFO=sxxx.x
(See Description of
Arguments)
N/A
BFS?
BFS=xx
(See Description of
Arguments)
N/A
BER?
BER=xxxxx
(See Description of
Arguments)
N/A
EBN?
EBN=xxxx
(see Description of
Arguments)
N/A
RED?
RED=x
(See Description of
Arguments)
N/A
TMP?
TMP=xxx
(see Description of
Arguments)
Response to
Command
Response to
Query
RSL=xxxxx
(See Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Offline Unit
Status
Faults and
Status
Command
(Instruction
& Qualifier)
N/A
8 bytes
N/A
10 bytes
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
Response to
Command
Query only. (1:1 set-up)
N/A
This query is sent to the online modem of a 1:1 pair. It provides access to the fault status information (FLT?)
of the offline modem. This is the only way to interrogate the status of an offline modem at the distant-end of
a link. The response format may be:
No_1for1 = Indicates that no 1:1 system has been detected. Presence of a 1kHz signal from the
CRS-150 is used to indicate a 1:1 set-up;
No_Comms = Indicates that a 1kHz signal has been detected, but that there is no (or not yet) a response
for the modem;
abcdef = The FLT? response information from the offline 600L unit; or
abcdefghxx = The FLT? response information from the offline 625 unit.
Query only.
N/A
Unit returns the current highest-priority fault and status codes for the Unit (hardware), TX Traffic, RX Traffic, and ODUs:
a = Unit status:
0 = No faults
1 = Power supply fault, +5 volts
2 = Power supply fault , +12 volts
3 = Power supply fault, –5 volts
4 = Power supply fault, +3.3 volts
5 = Power supply fault, –12 volts
6 = Power supply fault, +2.5 volts
7 = Top Card comms
8 = Tx synthesizer lock
9 = Rx synthesizer
A = Top card load fail
B = TPC/LDPC FPGA load fail
C = HDLC FPGA load fail
D = CnC FPGA load fail
E = VersaFEC FPGA load fail
F = Calibration data missing
Exception – 600L: F = Rx synthesizer2
G = Reference unlocked (Note: Tx off)
H = TXDCM fail
I = Over Temperature Alarm
J = Packet Processor mailbox fault
K = Fractional CnC use only
b = Tx Traffic status:
0 = Tx traffic OK
1 = No clock from terrestrial interface
2 = Tx FIFO slip
3 = AIS detected on incoming data
4 = AUPC upper limit reached
5 = (Hi-Stab) No External Ref found (no activity)
6 = BUC summary alarm (if ABA enabled)
7 = G.703 Loss of Signal (only valid in Clock Extend Mode)
Exceptions – 600L:6 = BUC current
7 = BUC voltage
D–51
Query
(Instruction &
Qualifier)
OUS?
FLT?
Response to
Query
OUS=xxxxxx
(see Description of
Arguments)
FLT=abcdefghxx
(see Description of
Arguments)
Exception –
600L Emulation
format:
FLT=abcdef
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
…Faults and
Status (cont.)
Command
(Instruction
& Qualifier)
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
8 = BUC no comms/bad checksum
9 = BUC PLL
A = BUC temperature
8 = CnC-APC home state
c = Rx Traffic status:
0 = Rx Traffic OK
1 = Demodulator unlocked
2 = AGC Alarm - signal out of range
3 = Demux Lock (Frame SYNC)
4 = Spare
5 = Buffer Slip
6 = AIS detected on incoming data
7 = Eb/No alarm
8 = Buffer Clock activity
9 = LNB summary alarm (if ALA enabled)
A = QDI Deframer Unlocked
Exception – 600L: 9 = LNB current
A = LNB voltage
B,C,D,E,F = Spare
G = CnC-APC band mismatch
d = Open Network:
0 = No Faults
1 = Loss of Tx frame
2 = BER Alarm
3 = Loss of Tx multiframe
4 = Tx signaling AIS
5 = Tx Remote alarm
6 = IBS satellite alarm
7 = IDR Rx BWA1
8 = IDR Rx BWA2
9 = IDR Rx BWA3
A = IDR Rx BWA4
B = IDR Tx BWA1
C = IDR Tx BWA2
D = IDR Tx BWA3
E = IDR Tx BWA4
e = Change in modem fault status since last poll
0 = unchanged
1 = changed
f = Change in modem configuration since last poll
0 = unchanged
1 = changed
g= BUC status/faults:
0 = OK, masked, or not present
1 = BUC current
2 = BUC voltage
3 = spare
D–52
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Command
(Instruction
& Qualifier)
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
4 = BUC no comms/bad checksum
5 = BUC PLL
6 = BUC temperature
h= LNB status/faults:
0 = OK, masked, or not present
1 = LNB current
2 = LNB voltage
xx = spares
…Faults and
Status (cont.)
CnC
Ratio Monitor
N/A
4 bytes
CnC
Delay Monitor
N/A
6 bytes
CnC
Freq Offset
Monitor
N/A
6 bytes
CnC Power
Ratio Monitor
N/A
6 bytes
Query only.
When CnC is enabled and the modem is locked, ratio (in dB) is monitored between the interferer and the
desired power.
Example 1: CRM=+02 (interferer > desired) (format = sdd)
Example 2: CRM=LT11 (less than –11 dB)
Example 3: CRM=GT11 (greater than +11 dB)
Example 4: CRM=99.9 (not locked or CnC not enabled)
Example 5: CRM=AUTO (in CnC-APC mode)
Query only.
When CnC is enabled and the modem is locked, delay (in microseconds) of the interferer is monitored.
Example 1: CDM=229500 (229.5 ms)
Example 2: CDM=999999 (not locked or CnC not enabled)
Query only.
When CnC is enabled, an estimated frequency offset (in kHz) is calculated between the interferer and the
desired power.
Example 1: CFM=+001.0 (1 kHz)
Example 2: CFM=9999.9 (not locked or CnC not enabled)
Query only.
When CnC is enabled and the modem is locked, ratio (in dB) between the interferer and the desired power
is monitored.. The precision is 0.1dB.
Example 1: CPR=+02.8 (interferer > desired) (format = sdd.d)
Example 2: CPR=LT11.0 (less than –11.0 dB)
Example 3: CPR=GT19.0 (greater than +19.0 dB)
Example 4: CPR=9999.9 (not locked or CnC not enabled)
Example 5: CPR=AUTO (in CnC-APC mode)
D–53
N/A
CRM?
CRM=xxxx
(see Description of
Arguments)
N/A
CDM?
CDM=xxxxxx
(see Description of
Arguments)
N/A
CFM?
CFM=xxxx.x
(see Description of
Arguments)
N/A
CPR?
CPR=xxxxxx
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Command
(Instruction
& Qualifier)
N/A
5 bytes
CnC-APC Bit
Error Rate
N/A
4 bytes
CnC-APC BER
Reset
ABR=
None
CnC-APC
Frame Error
Rate
N/A
4 bytes
CnC-APC FER
Reset
AFR=
None
CnC-APC
Activate/Suspe
nd
APC=
1 byte, 0 thru 2
Parameter
Type
CnC PSDR
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
Query only.
When CnC is enabled and the modem is locked, ratio (in dB) between the interferer and the desired power
is monitored. The precision is 0.1dB.
Example 1: PSD=+02.8 (interferer > desired) (format = sdd.d)
Example 2: PSD=999.9 (not locked or CnC not enabled)
Example 3: PSD=AUTO (in CnC-APC mode)
Query only.
Unit returns the value of CnC-APC BER in the form ax10-3, where:
First byte is the value, last two bytes are the exponent.
Returns 9999 if modem is not in CnC-APC mode or there is an APC frame sync error.
BER is measured in frame UW.
Example: ABE=8E-5
Command only.
Restart CnC-APC BER measurement.
Note: This command takes no arguments.
Query only.
Unit returns the value of CnC-APC FER in the form ax10-3, where:
First byte is the value, last two bytes aret he exponent.
Returns 9999 if modem is not in CnC-APC mode or there is an APC frame sync error.
Example: Example: AFE=8E-2
Command only.
Restart CnC-APC FER measurement.
Note: This command takes no arguments.
Command only.
Used to activate or suspend APC operation, in format APC=x, where:
0 = no action
1 = Activate APC
2 = Suspend APC
D–54
N/A
Query
(Instruction &
Qualifier)
PSD?
N/A
ABE?
ABE=xxxx
ABR=
N/A
N/A
N/A
AFE?
AFE=xxxx
AFR=
N/A
N/A
APC=
N/A
N/A
Response to
Command
Response to
Query
PSD=xxxxx
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
CnC-APC
state
CnC-APC Max
Power Level
Increase
Command
(Instruction
& Qualifier)
N/A
2 bytes
APL=
3 bytes
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
Query only.
Unit returns the state of APC operation. Return value is in form xx, where:
00 = APC is not active
01 = No Solution
02 = OK - ReBalance Done
03 = OK(Partial) - CnC Ratio approaches limit
04 = OK(Partial) - Local power approaches miminum value (-25 dBm for IF band)
05 = OK(Partial) - Local power approaches minimum value (-40 dBm for L-Band)
06 = OK(Partial) - Local power approaches maximum value (0 dBm)
07 = OK(Partial) - Local power approaches limit set by max power level increase
08 = OK(Partial) - Distant power approaches miminum value (-25 dBm for IF band)
09 = OK(Partial) - Distant power approaches minimum value (-40 dBm for L-Band)
10 = OK(Partial) - Distant power approaches maximum value (0 dBm)
11 = OK(Partial) - Distant power approaches limit set by max power level increase
12 = OK(Partial) - Incomplete
13 = No APC Frame Sync
14 = CnC Ratio Problem
15 = Local EbNo too high
16 = Distant EbNo too high
17 = Distant End ReBalance failed
18 = Distant End NoResponse
19 = Fail-Calculate Mismatch
20 = CnC Ratio too high
21 = Please run again
22 = APC is active
23 = Local margin too low
24 = Distant margin too low
25 = Rx Data Rate<64kbps
26 = Tx Data Rate<64kbps
27 = Local RSL too low
28 = Distant RSL too low
Command or Query.
CnC-APC maximum power level increase in the form x.x, range from 0.0 to 9.9 dB, limited by Tx power
level.
Example: APL=3.9 (APC max power level increase is 3.9 dB.)
D–55
Response to
Command
N/A
APL=
APL?
APL*
APL#
Query
(Instruction &
Qualifier)
APS?
APL?
Response to
Query
APS=xx
APL=xx.x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Command
(Instruction
& Qualifier)
AHS=
12 bytes
ACM Remote
Signal Noise
Ratio
N/A
4 bytes
ACM Local
Signal Noise
Ratio
N/A
4 bytes
Uncorrected
BER
N/A
7 or 8 bytes
Parameter
Type
CnC-APC
Home State
Number of
Arguments
Revision 15
MN-CDM625
Description of Arguments
Command or Query.
Command is only for Offline unit in Redundancy system, sent by 1:N switch or Online unit in 1:1 system.
Returns CnC-APC home state parameters in the form a,bbb,cc,ddd, where:
a = APC state. (1 = APC is active, 0 = APC is not active)
bbb = APC home state Tx power, in 0.1dB. (minus sign assumed)
cc = APC home state max power level increase, in 0.1 dB.
ddd = APC Tx power threshold, in 0.1 dB. (minus sign assumed)
Example: AHS=1,100,60,085 (APC is active, home state power is -10.0 dB, home state max power level
increase is 6.0 dB, power threshold is -8.5 dB)
Query only.
Returns the value of SNR of the remote demod in the form xx.x, where:
99.9 = Demod is unlocked.
xx.x = Not in IP-ACM.
Example: RSN=12.4
Query only.
Unit returns the value of Local Signal Noise Ratio in the form xx.x, where:
99.9 = demod is unlocked.
xx.x = Not in IP-ACM, Resolution 0.1 dB.
Example: SNR=12.3 (selects SNR=12.3 dB)
Query only.
Units returns the value of the uncorrected BER.
LT = less than
GT = greater than
Returns 9999999 if the demodulator is unlocked or uncorrected BER data is unavailable.
Example: BER=4.3E-02
BER=GT1.0E-1
D–56
Response to
Command
AHS=
AHS?
AHS*
AHS#
Query
(Instruction &
Qualifier)
AHS?
Response to
Query
AHS=a,bbb,cc,ddd
(see Description of
Arguments)
N/A
RSN?
RSN=xx.x
(see Description of
Arguments)
N/A
SNR?
SNR=xx.x
(see Description of
Arguments)
N/A
RBE?
RBE=xxxxxxxx
(See Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
D.5.8
Parameter
Type
BUC
Power Supply
enable
Revision 15
MN-CDM625
BUC Parameters (L-Band Device)
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
BPS=
Exception –
600L Emulation:
ODP=
BFR=
Exception –
600L Emulation:
ODR=
BCL=
Exception –
600L Emulation:
ODL=
BCH=
Exception –
600L Emulation:
ODH=
BAD=
Exception –
600L Emulation:
OAD=
BOE=
Exception –
600L Emulation:
OOP=
1 byte, value
of 0 or 1
BUC
DC
Current
N/A
4 bytes
BUC
Voltage
N/A
4 bytes
Query only.
BUC Voltage, in the form xx.x, where xx.x is a value between 0 and 64.0, units in volts.
N/A
BUC
Output Power
Level
N/A
4 bytes
Query only.
BUC Output Power Level, in the form xx.x, where xx.x is the value in dBm.
Returns xxxx when FSK is not enabled.
Example: BOL=37.4
N/A
BUC
10 MHz
Reference
BUC
Current
Low Limit
BUC
Current
High Limit
BUC
Address
BUC
Output Power
Enable
1 byte
4 bytes
Command or Query.
BUC Power Supply control in the form x. where:
0 = Disable the BUC DC Power Supply
1 = Enable the BUC DC Power Supply
Command or Query.
In the form x, where:
0 = OFF
1 = ON
Command or Query.
BUC Current Low Limit, in the form xxxx, where xxxx is a value between 0 and 4000mA, in 100mA
increments.
Response to
Command
4 bytes
Command or Query.
BUC Current High Limit, in the form xxxx, where xxxx is a value between 0 and 4000mA, in 100mA
increments.
1 byte, value
of 1 to 15
Command or Query.
BUC Address, in the form xx, where xx is a value between 1 and 15.
Note: This command is only valid when the FSK is enabled.
1 byte, value
of 0 or 1
Command or Query.
BUC Tx Carrier Output Power Enable in the form x, where:
0 = OFF
1 = ON
Note: This command is only valid when the FSK is enabled.
Query only.
BUC DC current, in the form xxxx, where xxxx is a value between 0 and 9999, units mA.
If not available, response is 0000.
D–57
Query
(Instruction &
Qualifier)
Response to
Query
BPS=
BPS?
BPS*
BPS#
BFR=
BFR?
BFR*
BFR#
BCL=
BCL?
BCL*
BCL#
BCH=
BCH?
BCH*
BCH#
BAD=
BAD?
BAD*
BAD#
BOE=
BOE?
BOE*
BOE#
BPS?
Exception –
600L Emulation:
ODP?
BFR?
Exception –
600L Emulation:
ODR?
BCL?
Exception –
600L Emulation:
ODL?
BCH?
Exception –
600L Emulation:
ODH?
BAD?
Exception –
600L Emulation:
OAD?
BOE?
Exception –
600L Emulation:
OOP?
BPS=x
(see Description of
Arguments)
N/A
BDC?
Exception –
600L Emulation:
ODC?
BDV?
Exception –
600L Emulation:
ODV?
BOL?
Exception –
600L Emulation:
OOL?
BDC=xxxx
(see Description of
Arguments)
BFR=x
(see Description of
Arguments)
BCL=xxxx
(see Description of
Arguments)
BCH=xxxx
(see Description of
Arguments)
BAD=xx
(see Description of
Arguments)
BOE=x
(see Description of
Arguments)
BDV=xx.x
(see Description of
Arguments)
BOL=xx.x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
BUC
Temperature
Command
(Instruction
& Qualifier)
N/A
Number of
Arguments
4 bytes
BUC
Phase Lock
Loop
N/A
1 byte, value
of 0 or 1
BUC Software
Version
N/A
2 bytes
BUC
Power Class
N/A
2 bytes
Revision 15
MN-CDM625
Query only.
BUCTemperature, in the form sxxx, where:
s = sign
xxx = number
Note: This query is only valid when the FSK and BUC power are turned On.
Query only.
BUC phase lock loop in the form x, where:
0 = Locked
1 = Unlocked
Note: This query is only valid when the FSK is enabled.
Query only.
BUC software version in the form xx, where xx is between 0 and 15.
Note: This query is only valid when the FSK and BUC power are turned On.
N/A
Query
(Instruction &
Qualifier)
BUT?
Exception –
600L Emulation:
ODT?
N/A
BPA?
Query only.
BUC Power Class in the form xx, where xx indicates the Power Class in watts.
Example: BPC=25
Note: This query is only valid when the FSK is enabled.
N/A
Description of Arguments
D–58
Response to
Command
Exception –
600L Emulation:
OLL?
N/A
BSV?
Exception –
600L Emulation:
OSV?
BPC?
Exception –
600L Emulation:
OPC?
Response to
Query
BUT=sxxx
(see Description of
Arguments)
BPA=x
(see Description of
Arguments)
BSV=xx
(see Description of
Arguments)
BPC=xx
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
D.5.9
Parameter
Type
LNB
DC Power
Control
LNB
Reference
Enable
Revision 15
MN-CDM625
LNB Parameters (L-Band Device)
Command
(Instruction
& Qualifier)
LPS=
Exception –
600L Emulation:
LNB & LNV
LNR=
Number of
Arguments
1 byte
1 byte, value
of 0 or 1
Description of Arguments
Command or Query.
LNB DC Power Supply Control, in the form x, where:
0 = OFF
1 = 13V LNB Voltage
2 = 18V LNB Voltage
3 = 24V LNB Voltage
Command or Query.
LNB Reference Enable, in the form x, where:
0 = Disable LNB Reference
1 = Enable LNB Reference
Command or Query.
Low Current Limit in the form xxx, where xxx is a value between 0 and 500 mA.
LNB
Low Current
Limit
LNL=
3 bytes
LNB
High Current
Limit
LNH=
3 bytes
Command or Query.
High Current Limit in the form xxx, where xxx is a value between 0 and 500 mA.
LNB
Current
N/A
4 bytes
Query only.
LNB Current in the form xxxx, where the value is in mA.
LNB
Voltage
N/A
4 bytes
Query only.
LNB Voltage in the form xxxx, where the value is in volts.
D–59
Response to
Command
LPS=
LPS?
LPS*
LPS#
LNR=
LNR?
LNR*
LNR#
LNL=
LNL?
LNL*
LNL#
LNH=
LNH?
LNH*
LNH#
N/A
N/A
Query
(Instruction &
Qualifier)
LPS?
Exception –
600L Emulation:
LNB & LNV
LNR?
Response to
Query
LPS=x
(see Description of
Arguments)
LNR=x
(see Description of
Arguments)
LNL?
LNL=xxx
(see Description of
Arguments)
LNH?
LNH=xxx
(see Description of
Arguments)
LNC?
LNC=xxxx
(see Description of
Arguments)
LVO=xxxx
(see Description of
Arguments)
LVO?
CDM-625 Advanced Satellite Modem
Appendix D
D.5.10
Parameter
Type
Revision 15
MN-CDM625
Ethernet Parameters
Command
(Instruction
& Qualifier)
Number of
Arguments
Description of Arguments
Response to
Command
Query
(Instruction &
Qualifier)
Response to
Query
Ethernet
Control
SEC=
31 bytes
Command or Query.
In the form 1abbbbc;2abbbbc;3abbbbc;4abbbbc, where:
1, 2, 3, 4 is port number.
a = reserved, default to 1.
bbbb = reserved, default to 0001.
c = port speed:
0 = Auto
1 = 100 Full
2 = 100 Half
3 = 10 Full
4 = 10 Half.
SEC=
SEC?
SEC*
SEC#
SEC?
SEC=1abbbbc;2ab
bbbc;3abbbbc;4abb
bbc
(see Description of
Arguments)
Actual
Negotiated
Port Speed
N/A
None
Query only.
In the form abcd, where:
a = port 1 negotiated port speed.
b = port 2 negotiated port speed.
c = port 3 negotiated port speed.
d = port 4 negotiated port speed.
a, b, c, d have the following values:
0 = Link down
1 = 100 Full
2 = 100 Half
3 = 10 Full
4 = 10 Half
N/A
NPS?
NPS=abcd
(see Description of
Arguments)
WAN Buffer
Length
WBL=
3 bytes
Command or Query.
WBL?
WAN Buffer Length, 20 to 780 milliseconds, in 20 milliseconds steps.
Example: WBL=100
WBL=
WBL?
WBL*
WBL#
WBL=xxx
(see Description of
Arguments)
Average WAN
Buffer Fill
State
N/A
Query only.
N/A
WBF?
WBF=xx
(see Description
of Arguments)
2 bytes
Returns the value of Average WAN buffer fill state, between 0 and 99%.
Example: WBF=33 (selects 33%)
D–60
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Ethernet
Global
Configuration
Command
(Instruction
& Qualifier)
EGC=
Number of
Arguments
Up to 347
bytes
VLAN Mode
Enable
SVM=
1 byte, value
0 or 1
Switch MAC
Learning
SML=
1byte, value
0 or 1
VLAN Table
SVT=
Up to 287
byes
Add entry to
VLAN table
SVA=
8 bytes
Management
VLAN ID
SMV=
4 bytes
Revision 15
MN-CDM625
Description of Arguments
Command or Query.
Global Configuration of CDM625 Ethernet, in the form shown in the Response to Query column, where:
1abccccdxxx;2abccccdxxx;3abccccdxxx;4abccccdxxx=Switch Ports configuration same as SPC
D=VLAN Mode Enable
same as SVM
E=Switch MAC Learning
same as SML
FF=QoS Priority
same as QOS
G= Ethernet 2048 Frame Size
same as EFS
H= Precision Time Protocol Feature
same as PTP
I= Precision Time Protocol Mode
same as PTM
J= Carrier ID
same as CAI
KKKK=Management VLAN ID
same as SMV
LLLL….=VLAN Table
same as SVT
Command or Query.
VLAN Mode Enable, in the form x, where:
0 = VLAN is Disabled
1 = VLAN is Enabled
Command or Query.
Switch MAC learning in the form x, where:
0 = Off
1 =On
Command or Query.
Sets/Returns all the entries in the VLAN table in the form aaaabcde,aaaabcde,aaaabcde,…, where:
aaaa = VLAN ID. Value range is 1-4095, must not be duplicate of any PVID.
b = property of port 1: 0=Tagged, 1=Filtered, 2=Untagged
c = property of port 2: 0=Tagged, 1=Filtered, 2=Untagged
d = property of port 3: 0=Tagged, 1=Filtered, 2=Untagged
e = property of port 4: 0=Tagged, 1=Filtered, 2=Untagged
Command only.
Adds entry to VLAN table in the form aaaabcde, where:
aaaa = New VLAN ID. Value range is 1-4095, must not be duplicate of any PVID or VLAN ID existing in
VLAN table.
b = property of port 1. 0=Tagged, 1=Filtered, 2=Untagged
c = property of port 2. 0=Tagged, 1=Filtered, 2=Untagged
d = property of port 3. 0=Tagged, 1=Filtered, 2=Untagged
e = property of port 4. 0=Tagged, 1=Filtered, 2=Untagged
Command or Query.
Management Port’s VLAN ID in the form aaaa, where:
aaaa = the ID number in the range 0001-4095.
D–61
Response to
Command
EGC=
EGC?
EGC*
EGC#
Query
(Instruction &
Qualifier)
EGC?
EGC?n (where n
= 0 to 9. Returns
the EGC portion
of 1 of 10 stored
configurations)
Response to
Query
EGC=1abccccdxxx;2
abccccdxxx;3abcccc
dxxx;4abccccdxxxD
EFFGHIJKKKKLLLL
….
(see Description of
Arguments)
SVM=
SVM?
SVM*
SVM#
SML=
SML?
SML*
SML#
SVT=
SVT?
SVT*
SVT#
SVM?
SVM=x
(see Description of
Arguments)
SML?
SML=x
(see Description of
Arguments)
SVT?
SVT=aaaabcde,aaa
abcde,aaaabcde…
(see Description of
Arguments)
SVA=
SVA?
SVA*
SVA#
N/A
SVA=aaaabcde
(see Description of
Arguments)
SMV=
SMV?
SMV*
SMV#
SMV?
SMV=aaaa
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Delete entry in
VLAN table
Command
(Instruction
& Qualifier)
SVD=
Packet
Processor
Card Enable
PPE=
QoS Mode
QOS=
Switch Ports
Configuration
SPC=
Number of
Arguments
4 bytes
Revision 15
MN-CDM625
Description of Arguments
Command only.
Deletes VLAN table entry in the form aaaa, where:
aaaa = the VLAN ID number in the range 0001-4095.
1 byte, value Command or Query.
0 or 1
Packet Processor Card Enable, in the form PPE=x, where:
0 = Packet Processor Card is Disabled
1 = Packet Processor Card is Enabled
Note: Change of this configuration results in modem auto-reboot only when IP Packet Processor option card
is installed and enabled. Otherwise, when the IP Packet Processor option card is not installed, this selection
is stored but is otherwise non-functional.
2 bytes
Command or Query.
Qo (Quality of Service) Mode, in the form QOS=ab where:
a = Layer 2 QoS;
0 = Off, Layer 2 QoS is disabled
1 = VLAN Priority only
2 = Port Priority only
3 = VLAN and Port Priority
b =Layer 3 QoS;
0 = Off, Layer 3 QoS is disabled
1 = Advanced QoS Max / Priority (requires Advanced QoS FAST Option)*
2 = Advanced QoS Min Max (requires Advanced QoS FAST Option)*
3 = Advanced QoS DiffServ (requires Advanced QoS FAST Option)*
*Note: Layer 3 QoS settings 1 through 3 apply to modem only with IP Packet Processor option card installed
and enabled.
47 bytes
Command or Query.
Sets/Returns Ethernet switch ports’ priority and PVID in the form
1abccccdxxx;2abccccdxxx;3abccccdxxx;4abccccdxxx, where:
1, 2. 3. 4 = Port number.
a = Port priority;
Value is 1, 2, 3 or 4 (the higher the number, the higher the priority).
b = Port Native Mode;
0 = Native Mode Disabled, 1 = Native Mode Enabled.
cccc = Port VLAN ID in the range of 0000-4095;
Value 0000 is only valid when port Native Mode is disabled.
d = Pause flow control;
0 = Off, 1 = On
xxx = Eeserved.
D–62
Response to
Command
SVD=
SVD?
SVD*
SVD#
PPE=
PPE?
PPE*
PPE#
Query
(Instruction &
Qualifier)
N/A
Response to
Query
SVD=aaaa
(see Description of
Arguments)
PPE?
PPE=x
(see Description of
Arguments)
QOS=
QOS?
QOS*
QOS#
QOS?
QOS=ab
(see Description of
Arguments)
SPC=
SPC?
SPC*
SPC#
SPC?
SPC=1abccccdxxx,2
abccccdxxx,3abcccc
dxxx,4abccccdxxx
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Edit entry in
VLAN table
Command
(Instruction
& Qualifier)
SVE=
Number of
Arguments
8 bytes
Packet
Processor
Working Mode
WMD=
1 byte, value
0 thru 3
Dedicated
Management
Port
DMP=
1 byte, value
0 thru 8
Ethernet 2048
Frame Size
EFS=
1 byte, value
0 or 1
Revision 15
MN-CDM625
Description of Arguments
Command only.
Edit VLAN table entry in the form aaaabcde, where:
aaaa = existing VLAN ID. Value range is 1-4095.
b = property of port 1;
0=Tagged, 1=Filtered, 2=Untagged
c = property of port 2;
0=Tagged, 1=Filtered, 2=Untagged
d = property of port 3;
0=Tagged, 1=Filtered, 2=Untagged
e = property of port 4;
0=Tagged, 1=Filtered, 2=Untagged
Command or Query.
Packet Processor Working Mode in the form x, where:
0 = Managed Switch
1 = Router Point to Point*
2 = Router Multipoint Hub*
3 = Router Multipoint Remote*
*Note: Settings 1 through 3 apply to modem only with IP Packet Processor option card installed and enabled.
Command or Query.
Dedicated Ethernet Management port in Redundancy system in the form x, where:
0 = Disabled (Any Ethernet port can do management, default value)
1 = Port 1
2 = Port 2
3 = Port 3
4 = Port 4
5 = Port 1 – Local only*
6 = Port 2 – Local only*
7 = Port 3 – Local only*
8 = Port 4 – Local only*
Notes:
1. VLAN must be Disabled to be able to select a port as Dedicated Management Port.
2. * Only LAN devices can access M&C of modem. NO remote modem access.
Command or Query.
2048 byte Ethernet Frame Size Enable/Disable in the form x, where:
0 = 2048 Ethernet Frame Size is Disabled
1 = 2048 Ethernet Frame Size is Enabled (supported by modem with baseboard hardware Rev2 and
above)
D–63
Response to
Command
SVE=
SVE?
SVE*
SVE#
Query
(Instruction &
Qualifier)
N/A
Response to
Query
SVE=aaaabcde
(see Description of
Arguments)
WMD=
WMD?
WMD*
WMD#
WMD?
WMD=x
(see Description of
Arguments)
DMP=
DMP?
DMP*
DMP#
DMP?
DMP=x
(see Description of
Arguments)
EFS=
EFS?
EFS*
EFS#
EFS?
EFS=x
(see Description of
Arguments)
CDM-625 Advanced Satellite Modem
Appendix D
Parameter
Type
Host Access
List
Enable/Disable
Packet
Processor
Redundancy
Command
(Instruction
& Qualifier)
ACL=
Number of
Arguments
1 byte, value
0 or 1
PRD=
1 byte, value
0 or 1
Precision Time PTP=
Protocol
1 byte, value
0 or 1
Precision Time PTM=
Protocol
Grandmaster
1 byte, value
0 or 1
Packet
Processor
Bootrom FW
Version
Packet
Processor
Image1 FW
Version
Packet
Processor
Image2 FW
Version
Packet
Processor
Running FW
Image
N/A
None
N/A
None
N/A
N/A
Revision 15
MN-CDM625
Description of Arguments
Command or Query.
IP Host Access List Enable/Disable in the form x, where:
0 = Host Access List is Disabled
1 = Host Access List is Enabled
Command or Query.
Valid only when Packet Processor is installed and Enabled.
Packet Processor Redundancy Enable/Disable, where:
0 = Disable Packet Processor Redundancy
1 = Enable Packet Processor Redundancy
Command or Query.
Precision Time Protocol Feature Enable/Disable in the form x, where:
0 = PTP is Disabled
1 = PTP Enabled
Command or Query.
Precision Time Protocol Grandmaster selection in the form x, where:
0 = Grandmaster reachable over LAN.
1 = Grandmaster reachable over WAN.
Query only.
Valid only when Packet Processor is installed and Enabled.
Returns Packet Processor Bootrom firmware version.
Response to
Command
ACL=
ACL?
ACL*
ACL#
PRD=
PRD?
PRD*
PRD#
Query
(Instruction &
Qualifier)
ACL?
Response to
Query
ACL=x
(see Description of
Arguments)
PRD?
PRD=x
(see Description of
Arguments)
PTP=
PTP?
PTP*
PTP#
PTM=
PTM?
PTM*
PTM#
N/A
PTP?
PTP=x
(see Description of
Arguments)
PTM?
PTM=x
(see Description of
Arguments)
VS0?
VS0=x
x is variable length of
text
Query only.
Valid only when Packet Processor is installed and Enabled.
Returns Packet Processor Image 1 firmware version.
N/A
VS1?
VS1=x
x is variable length of
text
None
Query only.
Valid only when Packet Processor is installed and Enabled.
Returns Packet Processor Image 2 firmware version.
N/A
VS2?
VS2=x
x is variable length of
text
None
Query only.
Valid only when Packet Processor is installed and Enabled.
Returns Packet Processor Running firmware image.
N/A
AFI?
AFI=x
x is variable length of
text
D–64
Appendix E. TELNET COMMAND
LINE INTERFACE (CLI)
OPERATION
E.1
Overview
The Telnet Command Line Interface (referred to hereafter as the Telnet CLI or the CLI) is an
Ethernet-based user menu system for the CDM-625 Advanced Satellite Modem equipped with
an installed and enabled optional IP Packet Processor card. The CLI facilitates configuration,
monitoring and control of the unit using a user-supplied terminal emulator (e.g., PuTTY or Tera
Term).
E.1.1
Interface Access
Any changes made to the modem that are not saved to permanent storage during
the active session will be lost if the modem is reset or loses power. This applies to
all of the base modem and optional Packet Processor parameters. The parameters
can be saved by pressing [F8] on any Telnet CLI configuration page.
For connection via a Terminal Emulator: The user PC must have network connectivity to a
Traffic Ethernet Port of the IP Module. This connectivity can be via a local LAN, a remote LAN, or
via a satellite link from another IP modem.
E–1
CDM-625 Advanced Satellite Modem
Appendix E
E.1.2
Revision 15
MN-CDM625
Terminal Emulator Considerations
1. For best results, Comtech EF Data recommends PuTTY or TeraTerm as the
preferred terminal emulators.
2. Use of the HyperTerminal terminal emulator is not supported or
recommended.
3. The numeric keypad’s ENTER key may not work on some terminal emulators.
E.1.2.1 Using the PuTTY Terminal Emulator
First, you must define your Telnet session connection:
•
For Connection type, select Telnet;
•
For Host Name (or IP Address), enter the interface IP Address (e.g., 192.168.1.11);
•
For Port, enter 107;
•
Click [Open] to proceed.
E–2
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
Next, log in to the Telnet CLI using a valid Username and Password:
The Telnet CLI Home menu should now be accessible:
1. In order to use the Telnet CLI to make configuration changes to the CDM-625,
Remote Access Mode should always be set to [Ethernet].
2. PuTTY in Linux may require the following setting to render correctly:
Settings > Window > Translation > Override with UTF-8 if locale says so [UNCHECK]
E–3
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.1.2.2 Using the Tera Term Terminal Emulator
First, you must define your Telnet session connection:
•
Select TCP/IP;
•
For Host, enter the interface IP Address (e.g., 192.168.1.11);
•
For Service, select Telnet;
•
For TCP port #, enter 107;
•
Click [OK] to proceed.
E–4
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
Next, before you log in, Tera Term requires the following settings on the Setup > Terminal page:
•
For New-Line[Receive], use the drop-down list to select CR;
•
For New-Line[Transmit], use the drop-down list to select CR+LF.
Finally, log in to the Telnet CLI using a valid Username and Password:
E–5
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
The Telnet CLI Home menu should now be accessible:
In order to use the Telnet CLI to make configuration changes to the CDM-625,
Remote Access Mode should always be set to [Ethernet].
E–6
CDM-625 Advanced Satellite Modem
Appendix E
E.2
Revision 15
MN-CDM625
Using the Telnet Command Line Interface (CLI)
In order to use the Telnet CLI to make configuration changes to the CDM-625,
Remote Access Mode should always be set to [Ethernet].
E.2.1
Telnet CLI Menu System – Parallel Functionality
The Telnet CLI allows monitoring, configuration, and control of the CDM-625 Satellite Modem in
a manner similar to functionality provided via its front panel menus and the CDM-625 Web
Server Interface. See those chapters for more in-depth explanations of operation.
•
•
Chapter 5. FRONT PANEL OPERATION
Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT
Certain configuration menu selections (e.g., Carrier-in-Carrier) are functional only
when that FAST feature has been purchased and enabled for operation. This chapter
documents the CLI as if all available options are installed – your configuration may
or may not provide the level of functionality as described in this chapter.
E.2.2
CLI Menus – Common Navigation and Operation Features
1. The CLI organizes operation under a hierarchy of Configuration and Information functions. You
may select a configuration submenu or information page (e.g., Administration, Statistics, etc.)
from this top-level menu, either by typing in the bracketed hot key that preceeds the submenu
name, or by using the ↑↓ arrow keys and pressing ENTER. Each submenu provides nested
dialog windows requiring further action.
2. The bottom of each “screen” shows the possible actions to take.
Home (Main) Menu page:
Submenu or nested pages (e.g., Administration, Statistics, etc.):
Dialog windows:
Table pages:
E–7
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
Note the following:
Selection
Description
[ENTER]Select
Press [ENTER] to accept any updates or changes made on this page – this does not
save the selection to configuration memory, additional action is required.
[ESC] Back
Press [ESC] to exit the current menu and return to the parent submenu.
[F5] Refresh
Press [F5] to discard any changes made on the page and restore all values from the
modem
[F8] Save
Press [F8] to save the currently defined settings to configuration memory
[F9] Add
Press [F9] to add a new index to a table (e.g., VLAN Table, Sect. E.3.4.4.1)
[F10] Exit
Press [F10] to end the CLI session and close the terminal emulator window
[F11] Delete
Press [F11] to delete an existing index from a table (e.g., VLAN Table, Sect.
E.3.4.4.1)
3. Any menu selection that requires user input
typically features an input dialog window.
Once a menu option is selected, its dialog
window opens and you must use the ↑↓
arrow keys to select a functional choice:
Other dialog windows require entry of an
descriptive alphanumeric string or an
operational numeric value. This example of
the Home > Administration > SNMP: [A]
Contact dialog window shows “Remote A
Site” as the Current Value and prompts you
to enter an alphanumeric New Value:
Type the new parameter, and then press [ENTER] to accept the entry. The dialog window closes
and the CLI returns you to the active configuration page.
4. Each dialog windows provides cues to
ensure proper configuration of the unit. If
you enter an invalid parameter, the CLI
rejects the entry and displays an error
message at the bottom of the window, as
shown in this example:
Here, the CLI rejects the attempted entry of 6 and displays the message “Number is out of
range”. Re-enter a new value (in this example, a value within the acceptable ranges of 0 and
8-32) and then press [ENTER] to continue. Otherwise, press [ESC] to quit the dialog window
and return to the configuration page. You may then proceed with further configuration
updates.
E–8
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
5. Any menu item that has been
changed since the previous save
gets appended with an asterisk [*],
as “Cnc Mode“ shows in this
example:
You must press [F8] to save any changes to the modem memory. If you press [ESC]
after changes have been made – but not saved – on a page, the Unsaved Changes
window opens to force further action:
Use the ← → arrow keys to select an action:
Selection
Action
[Save]
Save any changes made to the page to memory
[Discard]
Exit the page without saving and return to the parent submenu
[Go Back]
Return to the active configuration window to review or make further changes
6. For any page where the content
exceeds the defined window
height, a scroll bar appears on the
right hand side of the page:
Use the ↑↓ arrow keys within the window to scroll through the page contents.
This appendix documents the entire Telnet Command Line Interface. Some
features may not be available with your modem as equipped. Your CLI window
appearances may differ based on your terminal emulator’s configured window
settings.
E–9
CDM-625 Advanced Satellite Modem
Appendix E
E.3
E.3.1
Revision 15
MN-CDM625
Command Line Interface Pages
Home (Main) Menu
The Home Menu serves as the CLI’s primary navigation page. All selections made on this page
take you to the submenus listed in this table. Press a hot key to access a submenu from this toplevel navigation page.
Hot
Key
A
Description
Function
Sect.
Administration
Access administrative configuration submenu
B
Modem
Access modem configuration submenu
E.3.2
E.3.3
C
Network
Access network configuration submenu
E.3.4
D
WAN
E.3.5
E
Outdoor Unit (ODU)
F
Redundancy
G
General Information
H
Logs
I
Statistics
Access WAN configuration submenu
Access ODU comms, CSAT-5060 configuration submenus (summary
only)
Access 1:1 or 1:N redundancy configuration submenu
Enter alphanumeric Circuit ID; view read-only CDM-625 operations
information screens
Access Base Modem and Packet Processor stored events and
statistics logs, alarms control submenus
Access CDM-625 operational statistics submenus
J
Contact
View read-only Customer Support contact information screen
E.3.11
Open the Remote Access Mode setting
E.3.1.1
K
Remote Mode
E.3.6
E.3.7
E.3.8
E.3.9
E.3.10
See the listed appendix section for further information. Once you have confirmed that the
Telnet CLI’s Remote Access Mode is set to [Ethernet], press a hot key to access a configuration
submenu.
E–10
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.1.1 Home > Remote Access Mode
In order to proceed with the operations described through the remaining chapter, you must be
sure to set Remote Access Mode to [Ethernet] in order for configuration changes to be saved
into memory.
First, from the Home menu, press [K] to open the Remote Access Mode dialog window:
Then, use the ↑↓ arrow keys to select the Remote Mode as Ethernet, and press [ENTER] to
accept the selection. Finally, press [F8] to save to memory. Note the following:
Remote Access Mode Selection
Function
Configuration using Front Panel only
Local
Chapter 5. FRONT PANEL OPERATION
Configuration using Serial Port
Serial
EDMAC Slave
• Sect. 5.2.1.12 CONFIG: REMOTE (Remote Control)
• Appendix D. REMOTE CONTROL
EDMAC mode cannot be set here – the CLI displays
“EDMAC Slave” when the modem is in EDMAC Slave Mode
Chapter 11. EDMAC CHANNEL
Configuration using SNMP / Telnet CLI / Web Server Interface
Ethernet
Chapter 6,. ETHERNET-BASED REMOTE PRODUCT
MANAGEMET
E–11
CDM-625 Advanced Satellite Modem
Appendix E
E.3.2
Revision 15
MN-CDM625
Home > Administration Submenu
Open the Administration submenu from the Home menu. This submenu contains the following
options:
Hot
Key
Configuration Page
Function
Sect.
A
Host Access List
Configure Host Access List(s)
E.3.2.1
B
SNMP
Configure SNMP parameters and traps
E.3.2.2
C
Firmware (Base Modem)
View Base Modem firmware information or select image load
D
Firmware (Packet Processor)
View Packet Processor firmware information or select image
load
E.3.2.3
E
Reboot
Reboot the CDM-625
E.3.2.4
F
FAST Codes
Set the FAST Feature Demo Mode or view currently installed
FAST options
E.3.2.5
G
Save Modem Configuration
Save up to 10 modem configurations to memory
H
Load Modem Configuration
Recall 1 of 10 modem configurations from memory
I
Restore Factory Defaults
Discard any configuration changes and restore all settings
“as shipped”
E.3.2.6
E.3.2.7
Press a hot key to access a configuration page. See the specified appendix section for further
configuration information. Otherwise, press [ESC] to return to the Home menu.
E–12
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.2.1 Home > Administration > Host Access List
Open the scrollable Host Access List page from the Administration submenu. This page contains
the following options:
Hot
Key
Dialog Window
Function / Option Entry
A
Access List Enforcement
Use ↑↓ arrow keys to select Enabled or Disabled
B
E
H
K
Access IP 1 Access IP List Entry Enable
Access IP 2 Access IP List Entry Enable
Access IP 3 Access IP List Entry Enable
Access IP 4 Access IP List Entry Enable
C
Access IP 1 Access IP Address
F
Access IP 2 Access IP Address
I
Access IP 3 Access IP Address
L
Access IP 4 Access IP Address
D
Access IP 1 Access Network Prefix
G
Access IP 2 Access Network Prefix
J
Access IP 3 Access Network Prefix
M
Access IP 4 Access Network Prefix
Typical for each entry – Use ↑↓ arrow keys to set each list as
Enabled or Disabled
Typical for each entry – Enter each IP Address in the form
XXX.XXX.XXX.XXX
Be sure to include your system’s IP Address in
this list
Typical for each entry – Enter a value as follows:
• Range 1 – Enter a value of 0
• Range 2 – Enter a value from 8 to 32
If you enter an invalid value, the CLI displays
error message “Number is out of range”
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Administration
submenu.
E–13
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.2.2 Home > Administration > SNMP
Open the SNMP page from the Administration submenu. This page contains the following
options:
Hot
Key
Dialog Window
Option Entry
A
Contact
B
Name
C
Location
D
Enable Authentication Traps
Use the ↑↓ arrow keys to select Enabled or Disabled
E
SNMP Trap Destination IP Address 1
F
SNMP Trap Destination IP Address 2
Typical for either entry – Enter either IP Address in the form
XXX.XXX.XXX.XXX
G
SNMP Trap Version
Use the ↑↓ arrow keys to select SNMP V1 or SNMP V2
H
SNMP Trap Community
Enter the desired Trap Community name – the default name is
comtech
Typical for each entry – Enter the desired designations
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Administration
submenu.
E–14
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.2.3 Home > Administration > Firmware (Base Modem) or (Packet
Processor)
Open the Base Modem and Packet Processor Firmware pages from the Administration submenu.
Use these pages to view the current firmware information, or to select the alternate firmware
image to be loaded at startup or reboot. Both pages contain the following option:
Hot
Key
A
Dialog Window
Option Entry
Boot From
Use the ↑↓ arrow keys to set load as Image1 or Image2
Press the hot key to open the dialog window. Otherwise, press [ESC] to return to the
Administration submenu.
You must reboot the unit in order for the new firmware image load selection to take
effect.
E–15
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.2.4 Home > Administration > Reboot
Open the Reboot page from the Administration submenu. Use this page to perform a soft reboot
of the CDM-625. Otherwise, press [ESC] to return to the Administration submenu.
Hot
Key
A
Dialog Window
Option Entry
Force Reboot
Use the ↑↓ arrow keys to select No (default) or Yes to reboot
You must restart your Telnet CLI session upon reboot of the CDM-625.
E–16
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.2.5 Home > Administration > FAST
•
•
Sect. 5.2.8 SELECT: FAST Menus in Chapter 5. FRONT PANEL OPERATION
Appendix A. FAST ACTIVATION PROCEDURE
Open the FAST Options page from the Administration submenu. Use this page to review your
unit’s available and installed FAST features.
E–17
CDM-625 Advanced Satellite Modem
Appendix E
Hot
Key
A
Revision 15
MN-CDM625
Dialog Window
Option Entry
Demo Mode
Use the ↑↓ arrow keys to set Demo Mode as Disabled
(default) or Enabled
1.
If Enabled, the CDM-625 begins operation in
FAST Demo Mode – FAST Options Demo
Mode allows access to ALL CDM-625 FAST
options for 30 calendar days
2.
You must reboot the modem after enabling or
disabling Demo Mode
Sect. 5.2.8.2. FAST: Demo Mode (Chapter 5.
FRONT PANEL OPERATION)
Press [A] to open the Demo Mode dialog window. Otherwise, press [ESC] to return to the
Administration submenu.
E–18
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.2.6 Home > Administration > Save Modem Configuration / Load
Modem Configuration
Open the Save Modem Configuration and Load Modem Configuration pages from the
Administration submenu. Use these pages to save and load up to 10 modem configurations.
Press [A] to open the Save to Slot or Load from Slot dialog window. Otherwise, press [ESC] to
return to the Administration submenu.
Each modem configuration is stored in an assigned “slot” – 0 through 9. If a configuration slot is
available for storage, either page notes the status of that slot as Available. Otherwise, if the slot
contains an existing configuration, that slot’s storage time is specified in military format
(HH:MM:SS); the date is shown in DAY-MONTH-YEAR format in accordance with European
convention.
To store (save) a configuration setting:
•
First, make any desired configuration changes to the modem.
E–19
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
•
Next, open the Save Modem
Configuration window (Home
> [A] Administration > [G]
Save Modem Configuration).
Note the Configuration slots
listed in the window, and
then press [A] Save to Slot.
The nested dialog window
opens:
•
Then, enter 0 through 9, and then press [ENTER] to accept the selection.
•
Finally, press [F8] to save (store) the configuration. Wait while the configuration is
stored into memory.
Once a modem configuration is stored into the designated slot, the time and date are recorded,
and this information appears on the configuration slot line.
To load (recall) a configuration setting:
•
First, open the Load Modem
Configuration window (Home
> [A] Administration > [H]
Load Modem Configuration).
Note the saved configuration
slots listed in the window,
and then press [A] Load from
Slot. The nested dialog
window opens:
•
Then, enter 0 through 9, and press [ENTER] to accept the selection.
•
Finally, press [F8] to load (recall) the configuration. Wait while the configuration is
loaded from memory.
E–20
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.2.7 Home > Administration > Restore Factory Defaults
Open the Restore Factory Default page from the Administration submenu. Use this page to
restore the CDM-625 settings to the original settings as shipped from the factory.
Hot
Key
A
Dialog Window
Option Entry
Restore Factory Defaults
Use the ↑↓ arrow keys to set as Cancel (default) or Restore
Press [A] to open the Restore Factory Defaults dialog window. Otherwise, press [ESC] to return
to the Administration submenu.
By selecting Restore, the unit proceeds with restoration of factory defaults. Wait while the unit
reboots.
You must restart your Telnet CLI session upon reboot of the CDM-625.
E–21
CDM-625 Advanced Satellite Modem
Appendix E
E.3.3
Revision 15
MN-CDM625
Home > Modem Submenu
Open the Modem submenu from the Home menu. This submenu contains the following options:
Hot
Key
Configuration Page
Function
Sect.
A
Interface
Configure the Tx and Rx Framing Modes
E.3.3.1
B
Modem TX
Configure the unit’s Tx parameters
E.3.3.2
C
Modem RX
Configure the unit’s Rx parameters
E.3.3.3
D
Carrier-in-Carrier (CnC)
Configure CnC FAST Option
E.3.3.4
E
Adaptive Coding and
Modulation (ACM)
Configure ACM FAST Option
E.3.3.5
F
Drop and Insert (D&I)
Configure D&I parameters
E.3.3.6
G
Block Upconverter (BUC)
Configure BUC parameters and view operating statistics
E.3.3.7
H
Low-Noise Block
Downconverter (LNB)
Configure LNB parameters and view operating statistics
E.3.3.8
I
MEO (Medium Earth Orbit)
Configure MEO and Antenna Handover parameters
E.3.3.9
J
Utilities
Configure and monitor a variety of unit operational settings
E.3.3.10
K
Overhead
Configure ESC, IDR Backward Alarms, AUPC, and EDMAC
E.3.3.11
Press a hot key to access a configuration page. See the specified appendix section for further
configuration options. Otherwise, press [ESC] to return to the Home menu.
E–22
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.3.1 Home > Modem > Interface
Open the Interface page from the Modem submenu. This page contains the following options:
Hot
Key
Dialog Window
A
Tx Interface Type
C
Rx Interface Type
B
Tx Framing Mode
D
Rx Framing Mode
Option Entry
Typical for either entry – Use the ↑↓ arrow keys to select:
•
•
•
•
RS-422
G.703 Unbalanced
HSSI
IP ACM
• V.35
• Audio
• IP
Unframed
DNI
ESC ++
Frm QDI
•
•
•
•
• G.703 Balanced
• LVDS
• ASI
Typical for either entry – Use the ↑↓ arrow keys to select:
•
•
•
•
IBS
EDMAC
EDMAC2
EDMAC3
• IDR
• DNI ++
• QDI
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Modem
submenu.
E–23
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.3.2 Home > Modem > Modem TX
Open the Modem TX page from the Modem submenu. This page contains the following options:
Hot
Key
A
Dialog Window
Option Entry
Tx FEC Type
Use the ↑↓ arrow keys to select:
•
•
•
•
B
Tx Mod Type
None Diff Enc On
Sequential
TCM Reed-Solomon
LDPC
Viterbi
Sequential Reed-Solomon
TPC
VersaFEC
•
•
•
•
Use the ↑↓ arrow keys to select:
• BPSK
• 8PSK
• QPSK
• 16QAM
Use the ↑↓ arrow keys to select:
C
Tx FEC Code Rate
•
•
•
•
•
•
•
Rate 1/2
Rate 2/3
Rate 5/16
VersaFEC QPSK 0.533
VersaFEC QPSK 0.803
VersaFEC 8QAM 0.780
VersaFEC 16QAM 0.829
• VersaFEC 16QAM 0.644
• VersaFEC ULL QPSK 0.654
•
•
•
•
•
•
•
•
Viterbi Reed-Solomon
TCM
None Diff Enc Off
ULL
• OQPSK
• 8QAM
Rate 3/4
• Rate 7/8
Rate 1/1
• Rate 21/44
Rate 0.95
• VersaFEC BPSK 0.488
VersaFEC QPSK 0.631
• VersaFEC QPSK 0.706
VersaFEC 8QAM 0.642
• VersaFEC 8QAM 0.711
VersaFEC 16QAM 0.731 • VersaFEC 16QAM 0.780
VersaFEC 16QAM 0.853 • VersaFEC 8QAM 0.576
VersaFEC ULL BPSK
• VersaFEC ULL QPSK
0.493
0.493
• VersaFEC ULL QPSK 0.734
D
Tx Data Rate
Enter a value from 18.000 to 25000.000 Kbps
E
Tx Symbol Rate
Enter a value from 18.000 to 25000.000 Ksps
E–24
•
•
•
•
CDM-625 Advanced Satellite Modem
Appendix E
Hot
Key
Revision 15
MN-CDM625
Dialog Window
Option Entry
F
Tx Frequency
Enter a value as follows:
• Range 1 – From 50.0000 to 180.0000 MHz
• Range 2 – From 950.0000 to 2000.0000 MHz
G
Tx Spectrum Invert
Use the ↑↓ arrow keys to select Normal or Inverted
H
Tx Scrambler
Use the ↑↓ arrow keys to select Off, Normal, or IESS315
I
Tx Power Level
J
Tx Reed-Solomon
Encoding
Enter a value as follows:
• Range 1 – From -99.9 to 99.9 dBm
• Range 2 – From-40.00 to 0.0 dBm
K
Tx Data Invert
L
Tx Data Clock Invert
M
Tx Ternary Code
Use the ↑↓ arrow keys to select Normal, IESS410, EF Data, or IBS
Typical for either entry – Use the ↑↓ arrow keys to select Normal or Inverted
Use the ↑↓ arrow keys to select AMI, B8zs, B6zs, or Hdb3
Use the ↑↓ arrow keys to select:
N
Tx Carrier State
• Off
• On
• RTI, 10 s timeout
• Off External
• Off BUC delay
• RTI, 1 s timeout
• RTI, 2 s timeout
• RTI, 4 s timeout
• RTI, 7 s timeout
O
POCO
Use the ↑↓ arrow keys to select Disabled or Enabled
P
Tx Submux
Use the ↑↓ arrow keys to select Off or On
Use the ↑↓ arrow keys to select an IP/Synchronous setting:
Q
R
Tx Submux Ratio
Tx Filter Rolloff Factor
• 1/9
• 1/8
• 1/7
• 1/6
• 1/5
• 1/4
• 2/7
• 1/3
• 2/5
• 3/7
• 1/2
• 3/5
• 2/3
• 3/4
• 4/5
• 1/1
• 5/4
• 4/3
• 3/2
• 5/3
• 2/1
• 7/3
• 5/2
• 3/1
• 7/2
• 4/1
• 5/1
• 6/1
• 7/1
• 8/1
• 9/1
• 1/59
• 1/39
• 1/19
Use the ↑↓ arrow keys to select Factor 0.35 or Factor 0.25
Valid code rates depend on the selected FEC and Mod types – for example, you
cannot select “VersaFEC 16QAM 0.644” if your FEC is “TCM”
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Modem
submenu.
E–25
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.3.3 Home > Modem > Modem RX
Open the Modem RX page from the Modem submenu. This page contains the following options:
Hot
Key
A
Dialog Window
Option Entry
Rx FEC Type
Use the ↑↓ arrow keys to select
•
•
•
•
None Diff Enc On
Sequential
TCM Reed-Solomon
LDPC
•
•
•
•
Viterbi
Sequential Reed-Solomon
TPC
VersaFEC
•
•
•
•
Viterbi Reed-Solomon
TCM
None Diff Enc Off
ULL
Use the ↑↓ arrow keys to select:
B
Rx Mod Type
• BPSK
• QPSK
• OQPSK
• 8PSK
• 16QAM
• 8QAM
Use the ↑↓ arrow keys to select:
C
Rx FEC Code Rate
• Rate 1/2
• Rate 3/4
• Rate 7/8
• Rate 2/3
• Rate 1/1
• Rate 21/44
• Rate 5/16
• Rate 0.95
• VersaFEC BPSK 0.488
• VersaFEC QPSK 0.533
• VersaFEC QPSK 0.631
• VersaFEC QPSK 0.706
• VersaFEC QPSK 0.803
• VersaFEC 8QAM 0.642
• VersaFEC 8QAM 0.711
• VersaFEC 8QAM 0.780
• VersaFEC 16QAM 0.731
• VersaFEC 16QAM 0.780
• VersaFEC 16QAM 0.829
• VersaFEC 16QAM 0.853
• VersaFEC 8QAM 0.576
• VersaFEC 16QAM 0.644
• VersaFEC ULL BPSK
0.493
• VersaFEC ULL QPSK
0.493
• VersaFEC ULL QPSK 0.654
E–26
• VersaFEC ULL QPSK 0.734
CDM-625 Advanced Satellite Modem
Appendix E
Hot
Key
Dialog Window
Revision 15
MN-CDM625
Option Entry
Enter a value from 18.000 to 25000.000 Kbps
D
Rx Data Rate
Data Rate applies only when not in ACM Mode
Enter a value from 18.000 to 25000.000 Ksps
E
Rx Symbol Rate
F
Rx Frequency
Enter an Rx Frequency as follows:
• Range 1 – From 50.0000 to 180.0000 MHz
• Range 2 – From 950.0000 to 2000.0000 MHz
G
Rx Spectrum Invert
Use the ↑↓ arrow keys to select Normal or Inverted
H
Rx Descrambler
Use the ↑↓ arrow keys to select Off, Normal, or IESS315
I
Rx Acq Sweep Range
Enter a value from 1 to 200 kHz
J
Rx Reed-Solomon
Decoding
Use the ↑↓ arrow keys to select Normal, IESS410, EF Data, or IBS
K
Rx Data Invert
L
Rx Data Clock Invert
M
Rx Ternary Code
Use the ↑↓ arrow keys to select AMI, B8zs, B6zs, or Hdb3
N
Rx EbNo Alarm Point
Enter a value from 0.1 to 16.0 dB
O
Rx Equalizer Enable
Use the ↑↓ arrow keys to select Disabled or Enabled
P
Rx Submux
Use the ↑↓ arrow keys to select Off or On
Symbol Rate applies when in ACM Mode
Typical for either entry – Use the ↑↓ arrow keys to select Normal or Inverted
Use the ↑↓ arrow keys to select the IP/Synchronous setting:
Q
Rx Submux Ratio
• 1/9
• 1/8
• 1/7
• 1/6
• 1/5
• 1/4
• 2/7
• 1/3
• 2/5
• 3/7
• 1/2
• 3/5
• 2/3
• 3/4
• 4/5
• 1/1
• 5/4
• 4/3
• 3/2
• 5/3
• 2/1
• 7/3
• 5/2
• 3/1
• 7/2
• 4/1
• 5/1
• 6/1
• 7/1
• 8/1
• 9/1
• 1/59
• 1/39
• 1/19
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Modem
submenu.
E–27
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.3.4 Home > Modem > Carrier-in-Carrier (CnC)
Chapter 10. DOUBLETALK CARRIER-IN-CARRIER (CNC) OPTION
Open the Carrier-in-Carrier (CnC) page from the Modem submenu. This page contains the
following options:
Hot
Key
Dialog Window
Option Entry
Use the ↑↓ arrow keys to select:
A
CnC Mode
• Off
• On Normal
• APC CBand Side A
• APC XBand Side A
• APC KuBand Side A
• APC KaBand Side A
• APC CBand Side B
• APC XBand Side B
• APC KuBand Side B
• APC KaBand Side B
B
CnC Search Min Delay
Enter a minimum value from 0 to 330 ms
C
CnC Search Max Delay
Enter a maximum value from 0 to 330 ms
D
CnC Frequency Offset
Enter a value from 1 to 200 KHz
E
CnC PMSI Mode
Use the ↑↓ arrow keys to select Idle, Redundancy, Talk, or Listen
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Modem
submenu.
E–28
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.3.5 Home > Modem > Adaptive Coding and Modulation (ACM)
Chapter 17. ADAPTIVE CODING AND MODULATION (ACM) OPTION
Open the ACM page from the Modem submenu. Use this page as a quick reference guide for the
Minimum and Maximum Tx ModCod settings. This submenu contains the following options:
Hot
Key
Dialog Window
Option Entry
A
ACM Min Tx Mod Cod
Enter a minimum value from 0 to 11
B
ACM Max Tx Mod Cod
Enter a maximum value from 0 to 11
C
ACM Action on Remote Demod Unlock
Use the ↑↓ arrow keys to select Go To Min Tx Modcod or
Maintain Tx Modcod
D
ACM Target Eb No Margin
Enter a value from 0.0 to 4.5 dB
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Modem
submenu.
E–29
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.3.6 Home > Modem > Drop and Insert (D&I)
Chapter 9. CLOCK MODES AND DROP AND INSERT (D&I)
Open the Drop and Insert (D&I) page from the Modem page. This page contains the following
options:
Hot
Key
Dialog Window
Option Entry
A
Drop Type
B
Insert Type
Typical for either entry – Use the ↑↓ arrow keys to select T1D4, T1
ESF, E1 CCS, or E1CAS
C
Tx Terrestrial Alarm Mask
Use the ↑↓ arrow keys to select Alarm Active or Alarm Masked
D
Rx Terrestrial Alarm Enable
Use the ↑↓ arrow keys to select Disable or Enable
E
D&I Table
F
D&I++ Table
G
D&I Quad Table
See Sect. E.3.3.6.1 for details
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Modem
submenu.
E–30
CDM-625 Advanced Satellite Modem
Appendix E
E.3.3.6.1
Revision 15
MN-CDM625
Home > Modem > Drop and Insert (D&I) > D&I Tables
From the Drop and Insert (D&I) page, press E (D&I Table), F (D&I++ Table ) or G D&I Quad Table
to continue.
Typical for any table, enter a new value, and then press [ENTER] to accept the change or [ESC]
to return to the D&I page.
•
Hot Key [E] – D&I Table
The D&I Table dialog window shows the current value for the table. To edit the table value,
press A, and then enter a new value*. Press [ENTER] to accept the change or [ESC] to return
to the D&I dialog window.
* For correct syntax, see the DNI Command/Query Description of Arguments
column, SECT. D.5.5 Bulk Configuration Strings, page D-44 in APPENDIX D.
REMOTE CONTROL
•
Hot Key [F] – D&I++ Table
E–31
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
The D&I++ Table dialog window shows the current value for the table. To edit the table
value, press A, and then enter a new value*. Press [ENTER] to accept the change or [ESC] to
return to the D&I dialog window.
* For correct syntax, see the DIC Command/Query Description of Arguments
column, SECT. D.5.5 Bulk Configuration Strings, page D-44 in APPENDIX D.
REMOTE CONTROL
•
Hot Key [G] – D&I Quad Table
The D&I Quad Table dialog window shows the current value for each table. To edit a table
value*, press A (Quad Drop And Insert Port 1), B (Quad Drop And Insert Port 2), C (Quad
Drop And Insert Port 3), or D (Quad Drop And Insert Port 4).
* For correct syntax, see the QDI Command/Query Description of Arguments,
SECT. D.5.5 Bulk Configuration Strings, page D-45 in APPENDIX D. REMOTE
CONTROL
E–32
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.3.7 Home > Modem > Block Upconverter (BUC)
Open the Block Upconverter (BUC) page from the Modem submenu. This page features a readonly status section for the installed device and contains the following options:
Hot
Key
Dialog Window
Option Entry
A
BUC DC Power
Use the ↑↓ arrow keys to select Disable or Enable
B
BUC 10 MHz Reference
C
BUC RF Output
D
BUC Low Current Limit
Enter a low limit value from 0 to 4000 mA
E
BUC High Current Limit
Enter a high limit value from 0 to 4000 mA
F
BUC LO Frequency
Enter a value as follows:
• Range 1 – From 0 to 0 MHz
• Range 2 – From 3000 to 65000 MHz
G
BUC LO Mix
Use the ↑↓ arrow keys to select Low Side Mix or High Side Mix
H
BUC Address
Enter a value from 1 to 15
Typical for either entry – Use the ↑↓ arrow keys to select Off or On
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Modem
submenu.
E–33
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.3.8 Home > Modem > (Low-Noise Block Downconverter) LNB
Open the (Low-Noise Block Downconverter) LNB page from the Modem submenu. This page
provides a read-only status section for the installed device and contains the following options:
Hot
Key
Dialog Window
Option Entry
A
LNB DC Power
Use the ↑↓ arrow keys to select Off, On 13V, On 18V, or On 24V
B
LNB 10 MHz Reference
Use the ↑↓ arrow keys to select Disable or Enable
C
LNB Low Current Limit
Enter a low limit value from 0 to 500 mA
D
LNB High Current Limit
Enter a high limit value from 0 to 500 mA
E
LNB LO Frequency
Enter a value as follows:
• Range 1 – From 0 to 0 MHz
• Range 2 – From 3000 to 65000 MHz
F
LNB LO Mix
Use the ↑↓ arrow keys to select Low Side Mix or High Side Mix
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Modem
submenu.
E–34
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.3.9 Home > Modem > MEO (Medium-Earth Orbit)
MEO is non-functional when the optional Carrier-in-Carrier (CnC) card is installed.
CDM‐625 modems are configurable for continuous pairing as Primary and non‐Primary Modems
in an Antenna Handover System when the MEO (Medium Earth Orbit) feature is enabled. Open
the MEO page from the Modem submenu. This page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
MEO Enable
B
Antenna Handover Enable
Typical for either entry – Use the ↑↓ arrow keys to select Disabled
or Enabled
C
Antenna Handover Mode
Use the ↑↓ arrow keys to select Manual or Auto
D
Antenna Handover DPD
Enter a Differential Path Delay value from -30 to 30
E
Antenna Handover Port
Enter a value from 1001 to 65535
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Modem
submenu.
E–35
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.3.10 Home > Modem > Utilities
Open the scrollable Utilities page from the Modem submenu. This page contains the following
options:
Hot
Key
A
Dialog Window
Option Entry
Unit Test Mode
Use the ↑↓ arrow keys to select
• Normal
• IF Loopback
• I/O Loopback
E–36
• Tx CW
• RF Loopback
• Tx Alt10 Pattern
• Digital Loopback
CDM-625 Advanced Satellite Modem
Appendix E
Hot
Key
B
Revision 15
MN-CDM625
Dialog Window
Option Entry
Statistics Sample Interval
Use the ↑↓ arrow keys to select Disabled, or 10 minutes to 90 minutes
Use the ↑↓ arrow keys to select Loop No Action, Loop RTS Controls
Tx Output, or Ignore RTS Assert CTS
Use the ↑↓ arrow keys to select TA To CA Loop or RR Control CA TA
Control TxS
C
Request To Send
D
HSSI Handshake Control
E
Circuit ID
Enter a Circuit ID value as needed
F
Carrier ID
Use the ↑↓ arrow keys to select Disable or Enable
G
RTC Time
Enter a value in the form HH:MM:SS
H
RTC Date
Enter a value in the form DD:MM:YY
I
Tx Clock Source
J
Rx Clock Source
K
Rx Buffer Size
Use the ↑↓ arrow keys to select Internal, Tx Terrestrial, Rx Loop
Timed, or Rx Sat
Use the ↑↓ arrow keys to select Rx Satellite, Tx Terrestrial, Internal
SCT, or Insert
Enter a value from 16 to 32768
Use the ↑↓ arrow keys to select:
L
Modem Reference Clock
M
G703 Clock Extend Mode
Use the ↑↓ arrow keys to select None, Tx Lock, or Rx Enable
N
G703 Clock Extend Intf
Use the ↑↓ arrow keys to select T1, E1 Balanced, or E1 Unbalanced
O
Warm Up Delay
Use the ↑↓ arrow keys to select Disable or Enable
P
Warm Up Countdown
Enter a value from 0 to 999 seconds
Q
BERT Restart Monitor
Use the ↑↓ arrow keys to select No or Yes
R
BERT Tx State
Use the ↑↓ arrow keys to select Off or On
S
BERT Tx Pattern
U
BERT Rx Pattern
T
BERT Rx State
V
BERT 10^-3 Error Insert
W
Recenter Buffer
• Internal
• External 5 MHz
• External 1 MHz
• External 10 MHz
• External 2 MHz
• Internal Plus Output
Typical for either entry – Use the ↑↓ arrow keys to select:
•
•
•
•
BERT Pattern Space
BERT Pattern 12
BERT Pattern 2047
BERT Pattern 2^15
•
•
•
•
BERT Pattern Mark
BERT Pattern 63
BERT Pattern 2047 R
BERT Pattern 2^20
•
•
•
•
BERT Pattern 11
BERT Pattern 511
BERT Pattern MIL188
BERT Pattern 2^23
Typical for each entry – Use the ↑↓ arrow keys to select Off or On
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Modem
submenu.
E–37
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.3.11 Home > Modem > Overhead
Open the scrollable Overhead page from the Modem submenu. This page contains the following
options:
Hot
Key
Dialog Window
Option Entry
A
IDR Tx ESC Type
B
IDR Rx ESC Type
Typical for either entry – Use the ↑↓ arrow keys to select 64k Data
Channel or 2 Audio Channels
C
Tx Audio Volume Port 1
Typical for each entry – Use the ↑↓ arrow keys to select:
D
Tx Audio Volume Port 2
E
Rx Audio Volume Port 1
• Negative6
• Positive2
F
Rx Audio Volume Port 2
G
High Rate ESC
H
High Rate ESC Parameters
• Negative4
• Positive4
• Negative2
• Positive6
• Zero
• Positive8
Use the ↑↓ arrow keys to select Disabled or Enabled
See Sect. 5.2.1.10.6 CONFIG: Misc  HiRateESC in
Chapter 5. FRONT PANEL OPERATION for details
E–38
CDM-625 Advanced Satellite Modem
Appendix E
Hot
Key
Dialog Window
Revision 15
MN-CDM625
Option Entry
I
Tx Backward Alarm Enable Port1
J
Tx Backward Alarm Enable Port2
K
Tx Backward Alarm Enable Port3
L
Tx Backward Alarm Enable Port4
M
Rx Backward Alarm Enable Port1
N
Rx Backward Alarm Enable Port2
O
Rx Backward Alarm Enable Port3
P
Tx Backward Alarm Enable Port4
Q
AUPC Enable
Use the ↑↓ arrow keys to select Disable or Enable
R
AUPC Remote Demod Target Eb No
Enter a value from 0.0 to 14.9 dB
S
AUPC Tx Power Max Increase
Enter a value from 0 to 9 dB
T
AUPC Action On Max Power
U
AUPC Action On Remote Demod
Unlock
Use the ↑↓ arrow keys to select No Action, Generate Tx Alarm
Max Power, or Generate Tx Alarm Minimum ModCod
Use the ↑↓ arrow keys to select Go To Nominal Power, Go To
Max Power, or Hold
V
EDMAC Mode
Use the ↑↓ arrow keys to select Off, Master, or Slave
W
EDMAC Address
Enter a value from 0 to 9999
Typical for each entry – Use the ↑↓ arrow keys to select Off or On
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Modem
submenu.
E–39
CDM-625 Advanced Satellite Modem
Appendix E
E.3.4
Revision 15
MN-CDM625
Home > Network Submenu
Open the Network submenu from the Home menu. This submenu contains the following
options:
Hot
Key
Configuration Page
Function
Sect.
A
Ethernet Ports
Configure Ethernet Ports 1 through 4
E.3.4.1
B
LAN IP
Configure Ethernet Framing, IP addresses, QoS, Working
Mode, Packet Processor parameters
E.3.4.2
C
LAN ARP
Configure LAN ARP operation and table entries
E.3.4.3
D
VLAN
Configure VLAN operation and table entries
E.3.4.4
E
Routes
Enter static routes into the IP Packet Processor to route IP
traffic over the satellite or to another device on the local LAN
E.3.4.5
F
Managed Switch
Configure Header and Payload Compression and Encryption
operations
E.3.4.6
G
IGMP
Configure use of IGMP (Internet Group Management Protocol)
E.3.4.7
with configured multicast routes
H
DNS
Configure use of DNS (Domain Name System) caching
function
E.3.4.8
I
DHCP
Configure use of DHCP (Dynamic Host Configuration
Protocol) Relay function
E.3.4.9
J
PTP
Configure use and review status of PTP (Precision Time
Protocol) feature
E.3.4.10
K
SNTP
Configure use of SNTP (Simple Network Time Protocol)
feature, set RTC (Real Time Clock) time and date
E.3.4.11
L
MAC Table
View the MAC Addresses that the modem has discovered on
one or more of its Ethernet switch ports
E.3.4.12
Press a hot key to access a configuration page. See the specified appendix section for further
configuration options. Otherwise, press [ESC] to return to the Home menu.
E–40
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.4.1 Home > Network > Ethernet Ports
Open the scrollable Ethernet Ports page from the Network submenu. This page lists the current
configuration settings for Ethernet Ports 1 through 4.
Use the ↑↓ arrow keys to select <Ethernet Port 1>, <Ethernet Port 2>, <Ethernet Port 3>, or
<Ethernet Port 4>, and then press [ENTER] to continue.
E–41
CDM-625 Advanced Satellite Modem
Appendix E
E.3.4.1.1
Revision 15
MN-CDM625
Home > Network > Ethernet Ports > Ethernet Port #
Open the nested Ethernet Port 1 through Ethernet Port 4 pages from the scrollable Home >
Network> Ethernet Ports page. Each page contains the following options:
Hot
Key
Dialog Window
Option Entry
Use the ↑↓ arrow keys to select:
A
Ethernet Ports Speed
• Auto
• Full 100 Mbps
• Full 10 Mbps
• Half 10 Mbps
• Half 100 Mbps
B
Ethernet Ports Pause Flow Control
Use the ↑↓ arrow keys to select Off or On
C
Ethernet Port Mode
Use the ↑↓ arrow keys to select Trunk or Access
D
Ethernet PVID
Enter a value from 1 to 4095
E
Ethernet Port Priority
Enter a priority value from 1 to 4
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Ethernet Ports
page.
E–42
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.4.2 Home > Network > LAN IP
Open the LAN IP page from the Network submenu. This page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
2048-byte Ethernet Frames
Use the ↑↓ arrow keys to select Disabled or Enabled
B
Default Gateway
C
IP Address
Typical for either entry – Enter an IP address in the form
XXX.XXX.XXX.XXX
D
IP Network Prefix
Enter a value from 8 to 30
E
Switch MAC Learning
Use the ↑↓ arrow keys to select Off or On
F
L2 QoS
Use the ↑↓ arrow keys to select Off, VLAN Prio Only, Port Prio
Only, or VLAN and Port Prio
G
L3 QoS
Use the ↑↓ arrow keys to select Off, Advanced QoS Max
Priority, Advanced QoS Min Max, or Advanced QoS DiffServ
H
Working Mode
Use the ↑↓ arrow keys to select Managed Switch, Router
Point-to-Point, Router Multipoint Hub, or Router Multipoint
Remote
I
Packet Processor Enable
Use the ↑↓ arrow keys to select Disabled or Enabled
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Network
submenu.
E–43
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.4.3 Home > Network > LAN ARP
Open the LAN ARP page from the Network submenu. This page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
ARP Table
Use the ↑↓ arrow keys to select a table – see Sect. E.3.4.3.1.
B
Flush Dynamic ARP Entries
Use the ↑↓ arrow keys to select Cancel or Flush
Press a hot key to view the ARP Table or open the dialog window. Otherwise, press [ESC] to
return to the Network submenu.
E–44
CDM-625 Advanced Satellite Modem
Appendix E
E.3.4.3.1
Revision 15
MN-CDM625
Home > Network > LAN ARP > Arp Table > Arp Entry #
Open the ARP Table from the nested ARP submenu. Use the ↑↓ arrow keys to scroll through
the available entries. You may also select a header (e.g., <ARP Entry 1>) and press [ENTER] to
view, in a standalone window, a specific ARP Entry page as shown in this example:
This window displays the ARP Type for the specific ARP Entry #. It contains the following options:
Hot
Key
Dialog Window
Option Entry
A
ARP IP Address
Enter an IP Address in the form XXX.XXX.XXX.XXX
B
ARP MAC Address
Enter a MAC Address in the form of this example:
90:e2:ba:2b:a6:bb
Press a hot key to open a dialog window. Otherwise, press [ESC] twice to return to the Network
submenu.
E–45
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.4.4 Home > Network > VLAN
Open the VLAN submenu from the Network submenu. This submenu contains the following
options:
Hot
Key
Dialog Window
Option Entry
A
VLAN Table
Use the ↑↓ arrow keys to select a table – see Sect. E.3.4.4.1
B
VLAN Mode Enable
Use the ↑↓ arrow keys to select Disabled or Enabled
C
Ethernet Management PVID
Enter a value from 1 to 4095
Press a hot key to open the VLAN Table or a dialog window. Otherwise, press [ESC] to return to
the Network submenu.
E–46
CDM-625 Advanced Satellite Modem
Appendix E
E.3.4.4.1
Revision 15
MN-CDM625
Home > Network > VLAN > VLAN Table > VLAN #
Open the VLAN Table from the nested VLAN submenu. Use the ↑↓ arrow keys to scroll through
the available entries. You may also select a header (e.g., <VLAN 1>) and press [ENTER] to view,
in a standalone window, a specific VLAN page as shown in this example:
Each available VLAN # page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
VLAN Entry VID
Enter a value from 1 to 4095
B
VLAN Entry Port1 Property
C
VLAN Entry Port2 Property
D
VLAN Entry Port3 Property
E
VLAN Entry Port4 Property
Typical for each entry – Use the ↑↓ arrow keys to select Tagged,
Filtered, or Untagged
Typical for any accessed VLAN table, press a hot key to open a dialog window. Otherwise, press
[ESC] twice to return to the Network submenu.
E–47
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.4.5 Home > Network > Routes
Open the Routes page from the Network submenu. This page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
Route Table
Use the ↑↓ arrow keys to select an index – see Sect. E.3.4.5.1
B
Delete All Route Entries
Use the ↑↓ arrow keys to select No or Yes
Press a hot key to open the Route Table or the dialog window. Otherwise, press [ESC] to return
to the Network submenu.
E–48
CDM-625 Advanced Satellite Modem
Appendix E
E.3.4.5.1
Revision 15
MN-CDM625
Home > Network > Routes > Route Table
Open the Route Table from the nested Routes submenu. Use the ↑↓ arrow keys to scroll
through the available entries. You may also select a header (e.g., <Index 1>) and press [ENTER]
to view, in a standalone window, a specific Route Index page as shown in this example:
Each available Index # page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
Route Description
Enter a description here
B
Route Destination Address/Mask
Enter an IP Address/Range in the form XXX.XXX.XXX.XXX/XX
C
Route Interface
Use the ↑↓ arrow keys to select LAN or WAN
D
Route LAN Next Hop Address
Enter an IP Address in the form XXX.XXX.XXX.XXX
E
Route Header Compression
F
Route Payload Compression
G
Route Encryption
H
Route Encryption Key
Typical for each entry – Use the ↑↓ arrow keys to select Disable
or Enable
Use the ↑↓ arrow keys to select Key 1 through Key 8, or
Random
Typical for any accessed Index # page, press a hot key to open a dialog window. Otherwise, press
[ESC] twice to return to the Network submenu.
E–49
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.4.6 Home > Network > Managed Switch
Open the Managed Switch page from the Network submenu. This page contains the following
options:
Hot
Key
Dialog Window
Option Entry
A
Header Compression
Use the ↑↓ arrow keys to select Disable, Layer 2 Only, or Layer
2 And 3
B
Payload Compression
C
Encryption Feature
D
Encryption Key Select
Typical for either entry – Use the ↑↓ arrow keys to select Disable
or Enable
Use the ↑↓ arrow keys to select Key 1 through Key 8, or
Random
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Network
submenu.
E–50
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.4.7 Home > Network > IGMP (Internet Group Management Protocol)
Open the IGMP page from the Network submenu. This page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
IGMP Joined Groups
Lists the IGMP Groups that are active on the modem. If none
exist, this window displays the message <No IGMP Groups>
B
Multicast Traffic
Lists the Multicast Routes that are active on the modem. If none
exist, this window displays the message <No IGMP Multicast
Entries>
C
IGMP Version
Use ↑↓ arrow keys to select IGMPv1, IGMPv2, or IGMPv3
D
IGMP Last Member Query Interval
Enter a value from 1 to 25 seconds
E
IGMP Query Interval
Enter a value from 1 to 18000 seconds
F
IGMP Query Response Interval
Enter a value from 1 to 25 seconds
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Network
submenu.
E–51
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.4.8 Home > Network > DNS (Domain Name System)
Open the DNS Caching page from the Network submenu. This page contains the following
options:
Hot
Key
Dialog Window
Option Entry
A
DNS Caching Feature
Use the ↑↓ arrow keys to select Disable or Enable
B
DNS Caching Flush
Use the ↑↓ arrow keys to select Cancel or Flush
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Network
submenu.
E.3.4.9 Home > Network > DHCP (Dynamic Host Configuration Protocol)
Open the DHCP Relay page from the Network submenu. This page contains the following
options:
Hot
Key
Dialog Window
Option Entry
A
DHCP Relay Feature
Use the ↑↓ arrow keys to select Disable or Enable
B
DHCP Relay IP Address
Enter an IP Address in the form XXX.XXX.XXX.XXX
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Network
submenu.
E–52
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.4.10 Home > Network > PTP (Precision Time Protocol)
Open the PTP (Precision Time Protocol) page from the Network submenu. This page contains the
following options:
Hot
Key
Dialog Window
Option Entry
A
PTP Feature
Use the ↑↓ arrow keys to select Disable or Enable
B
PTP Grandmaster
Use the ↑↓ arrow keys to select LAN or WAN
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Network
submenu.
E–53
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.4.11 Home > Network > SNTP (Simple Network Time Protocol)
Open the Simple Network Time Protocol (SNTP) page from the Network submenu. This page
contains the following options:
Hot
Key
Dialog Window
Option Entry
A
SNTP Enable
Use the ↑↓ arrow keys to select Disabled or Enabled
B
SNTP Primary Server
C
SNTP Backup Server
Typical for either entry – Enter an IP Address in the form
XXX.XXX.XXX.XXX
[R/O]
SNTP Primary Last Update
[R/O]
SNTP Backup Last Update
These read-only entries display the date/timestamp of the last
updates – otherwise, if no updates have occurred, entries will
read “Never”
D
RTC Time
Enter a time in the form HH:MM:SS
E
RTC Date
Enter a date in the form DD:MM:YY
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Network
submenu.
E–54
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.4.12 Home > Network > MAC Table
Open the MAC Table page from the Network submenu. Use this page to review status
information on the recognized MAC Addresses.
Use the ↑↓ arrow keys to scroll through the available indices. You may also press [ENTER] to
select, and then view in a standalone window, a specific Index entry. Otherwise, press [ESC] to
return to the Network submenu.
E–55
CDM-625 Advanced Satellite Modem
Appendix E
E.3.5
Revision 15
MN-CDM625
Home > WAN Submenu
Open the WAN submenu from the Home menu. This submenu contains the following options:
Hot
Key
Configuration Page
Function
Sect.
A
QoS
Configure Quality of Service operation
E.3.5.1
B
Compression
Configure Router Mode compression refresh rates
E.3.5.2
C
Encryption
Configure Managed Switch Mode Encryption and define
Encryption Keys 1 through 8
E.3.5.3
Press a hot key to access a configuration page. See the specified appendix section for further
configuration options. Otherwise, press [ESC] to return to the Home menu.
E.3.5.1 Home > WAN > QoS Submenu
Open the QoS (Quality of Service) submenu from the WAN submenu. This submenu contains the
following options:
Hot
Key
Page / Dialog Window
Description / Option Entry
A
QoS Max-Pri and Min-Max Table
See Sect. E.3.5.1.1
B
QoS Differentiated Services Table
See Sect. E.3.5.1.2
C
QoS SAR Feature
Use the ↑↓ arrow keys to select Disable or Enable
D
QoS Rules Delete All
Use the ↑↓ arrow keys to select No or Yes
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Network
submenu.
E–56
CDM-625 Advanced Satellite Modem
Appendix E
E.3.5.1.1
Revision 15
MN-CDM625
Home > WAN > QoS > Max-Pri and Min-Max Table
Open the scrollable QoS Table (Max-Pri and Min-Max Table) from the QoS submenu.
Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header
(e.g., <Index 1>) and press [ENTER] to view, in a standalone window, a specific set of statistics as
shown in this example:
Press [ESC] to return to the QoS submenu.
E–57
CDM-625 Advanced Satellite Modem
Appendix E
E.3.5.1.2
Revision 15
MN-CDM625
Home > WAN > QoS > QoS Differentiated Services Table
Open the nested QoS Differentiated Services page from the QoS submenu. This page contains
the following options:
Hot
Key
Dialog Window
A
AF4 Service Rate
D
AF3 Service Rate
G
AF2 Service Rate
J
AF1 Service Rate
B
AF4 Medium Drop Precedence Level
E
AF3 Medium Drop Precedence Level
H
AF2 Medium Drop Precedence Level
K
AF1 Medium Drop Precedence Level
C
AF4 High Drop Precedence Level
F
AF3 High Drop Precedence Level
I
AF2 High Drop Precedence Level
L
AF1 High Drop Precedence Level
Option Entry
Typical for each entry – Enter a value from 0 to 100000000 Kbps
Typical for each entry – Enter a value from 20 to 90%
Typical for each entry – Enter a value from 10 to 80%
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the QoS submenu.
E–58
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.5.2 Home > WAN > Compression
Open the Compression page from the WAN submenu. This page contains the following options:
Hot
Key
Dialog Window
A
Header Comp RTP Refresh Rate
B
Header Comp UTD Refresh Rate
C
Header Comp Default Refresh Rate
D
Payload Comp Refresh Rate
Option Entry
Typical for each entry – Enter a value from 1 to 600
Enter a value from 1 to 255
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the WAN submenu.
E–59
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.5.3 Home >WAN > Encryption
Open the Encryption page from the WAN submenu. This page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
Allow Unencrypted Rx
Use the ↑↓ arrow keys to select Drop or Allow
B
Encryption Feature
Use the ↑↓ arrow keys to select Disable or Enable
C
Encryption Key Select
Use the ↑↓ arrow keys to select Key1 through Key8, or Random
D
Encryption Key 1
E
Encryption Key 2
F
Encryption Key 3
G
Encryption Key 4
Typical for each key entry – Enter a 32-character encryption code
E–60
CDM-625 Advanced Satellite Modem
Appendix E
Hot
Key
Dialog Window
H
Encryption Key 5
I
Encryption Key 6
J
Encryption Key 7
K
Encryption Key 8
L
Decryption Key 1
M
Decryption Key 2
N
Decryption Key 3
Revision 15
MN-CDM625
Option Entry
Typical for each key entry – Enter a 32-character encryption code
Typical for each key entry – Enter a 32-character decryption code
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the WAN submenu.
E–61
CDM-625 Advanced Satellite Modem
Appendix E
E.3.6
Revision 15
MN-CDM625
Home > Outdoor Unit (ODU) Submenus (Summary Only)
1. After configuring the CDM-625 for 70/140 MHz operation, and then enabling
ODU Comms, you may use the Telnet CLI ‘ODU (Outdoor Unit)’ submenus
and pages to control and monitor a CSAT-5060 Outdoor Unit that is
connected via FSK to the CDM-625.
2. Comtech EF Data KST-2000A/B Transceivers and LPOD Outdoor Amplifiers /
Block Up Converters (BUCs) are not supported by the Telnet CLI at this time.
See Appendix F. CDM-625 ODU (TRANSCEIVER, BUC, LNB) OPERATION for
complete details about using this product-specific menu branch.
E–62
CDM-625 Advanced Satellite Modem
Appendix E
E.3.7
Revision 15
MN-CDM625
Home > Redundancy Submenu
Open the Redundancy submenu from the Home menu. This submenu additionally displays the
status of the redundant modem setup. The redundant modem operation options are as follows:
Hot
Key
Dialog Window
Option Entry
A
Traffic IP Address
Enter an IP address in the form XXX.XXX.XXX.XXX
B
Traffic IP Network Prefix
Enter a value from 8 to 30
C
Redundancy 1-for-N Mode
D
Packet Processor Redundancy
Typical for either entry – Use the ↑↓ arrow keys to select
Disabled or Enabled
E
Force Redundant Switch
Use the ↑↓ arrow keys to select No Switch or Force Switch
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the Home
submenu.
E–63
CDM-625 Advanced Satellite Modem
Appendix E
E.3.8
Revision 15
MN-CDM625
Home > General Information Submenu
Open the General Information submenu from the Home menu. This submenu contains the
following options:
Hot
Key
Information Page
Sect.
A
Modem Status
E.3.8.1
B
Modem Information
E.3.8.2
C
MAC Table
E.3.8.3
D
Block Upconverter (BUC)
E.3.8.4
E
Low Noise Block Downconverter (LNB)
E.3.8.5
Press a hot key to access a read-only (except where noted) information page. See the specified
appendix section for further information. Otherwise, press [ESC] to return to the Home menu.
E–64
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.8.1 Home > General Information > Modem Status
Press [ESC] to return to the General Information submenu.
E–65
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.8.2 Home > General Information > Modem Information
Open the Modem Information page from the General Information submenu. This page contains
the following option:
Hot
Key
A
Dialog Window
Option Entry
Circuit ID
Enter an identifying label for the modem
Press the hot key to open the dialog window. Otherwise, press [ESC] to return to the General
Information submenu.
E–66
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.8.3 Home > General Information > MAC Table
Press [ESC] to return to the General Information submenu.
E–67
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.8.4 Home > General Information > Block Upconverter (BUC)
Press [ESC] to return to the General Information submenu.
E.3.8.5 Home > General Information > Low Noise Block Downconverter
(LNB)
Press [ESC] to return to the General Information submenu.
E–68
CDM-625 Advanced Satellite Modem
Appendix E
E.3.9
Revision 15
MN-CDM625
Home > Logs Submenu
Open the Logs submenu from the Home menu. This submenu contains the following options:
Hot
Key
Dialog Window
Sect.
A
Base Modem
E.3.9.1
B
Packet Processor
E.3.9.2
Press a hot key to access a submenu. See the specified appendix section for further information.
Otherwise, press [ESC] to return to the Home menu.
E–69
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.9.1 Home > Logs > Base Modem
Open the Base Modem page from the Logs submenu. This page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
Stored Event Table
See Sect. E.3.9.1.1
B
Stored Statistic Table
See Sect. E.3.9.1.2
C
Clear All Stored Events
D
Clear All Stored Statistics
Typical for either entry – Use the ↑↓ arrow keys to select
Cancel or Clear
E
Alarm Mask Tx AIS
F
Alarm Mask Rx AIS
G
Alarm Mask Buffer Slip
H
Alarm Mask Rx AGC
I
Alarm Mask Eb No
J
Alarm Mask BUC
K
Alarm Mask LNB
L
Alarm Mask G703 Loss of Signal
M
Alarm Mask Reference
N
Alarm Mask Tx Clock
Typical for each entry – Use the ↑↓ arrow keys to select Active
or Masked
Press a hot key to open a dialog window. See the specified appendix section for further
information. Otherwise, press [ESC] to return to the Home menu.
E–70
CDM-625 Advanced Satellite Modem
Appendix E
E.3.9.1.1
Revision 15
MN-CDM625
Home > Logs > Base Modem > Stored Event Table
Open the scrollable Stored Event Table from the Base Modem page. Use the ↑↓ arrow keys to
scroll through the available entries. A date, time, and description is provided for each event.
Events are numbered in the order logged, from the time the event logging buffer was last
cleared.
Press [ESC] to return to the Base Modem page. Or, you may press [ENTER] to select, and then
view in a standalone window, a specific stored event as shown in this example:
E–71
CDM-625 Advanced Satellite Modem
Appendix E
E.3.9.1.2
Revision 15
MN-CDM625
Home > Logs > Base Modem > Stored Statistic Table
Open the scrollable Stored Statistic Table from the Base Modem page. Use the ↑↓ arrow keys
to scroll through the available entries. A date, time, and description is provided for each
statistic. Statistics are numbered in the order logged, from the time the statistics logging buffer
was last cleared.
Press [ESC] to return to the Base Modem page. Or, you may press [ENTER] to select and view in
a standalone window, a specific stored statistic as shown in this example:
E–72
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.9.2 Home > Logs > Packet Processor
Open the Packet Processor page from the Logs submenu. This page contains the following
options:
Hot
Key
Page / Dialog Window
Description / Option Entry
A
Stored Event Table
See Sect. E.3.9.2.1
B
Logging
Use the ↑↓ arrow keys to select Enable or Disable
C
Logging Level
Use the ↑↓ arrow keys to select Errors Only, Errors And
Warnings, or All Information
D
Clear Event Log
Use the ↑↓ arrow keys to select Cancel or Clear
Press a hot key to open a dialog window. See the specified appendix section for further
information. Otherwise, press [ESC] to return to the Logs submenu.
E–73
CDM-625 Advanced Satellite Modem
Appendix E
E.3.9.2.1
Revision 15
MN-CDM625
Home > Logs > Packet Processor > Stored Event Table
Open the scrollable Stored Event Table from the Packet Processor page. Use the ↑↓ arrow keys
to scroll through the available entries. You may also select a header (e.g., <Event 1>) and press
[ENTER] to select, and then view in a standalone window, a specific stored event as shown in
this example:
A date, time, and description is provided for each event. Events are numbered in the order
logged, from the time the event logging buffer was last cleared.
Press [ESC] to return to the Base Modem page.
E–74
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10 Home > Statistics Submenu
The Telnet CLI Statistics submenu provides access to a number of read-only informational pages.
Most page submenus provide a dialog window that affords you the option to reset (clear) the
counters for that specific page.
Open the Statistics submenu from the Home menu:
Hot
Key
Page
Description
Sect.
A
Ethernet
Access pages to review Ethernet Ports 1 through 4 Rx, Tx,
and Error Statistics
E.3.10.1
B
Router
Review received, routed, transmitted, and errored packets
E.3.10.2
C
Managed Switch
Review Managed Switch LAN/WAN/Management received,
transmitted, and errored packets statistics
E.3.10.3
D
WAN (Router Mode)
Review Router Mode WAN/Interface/Satellite received,
transmitted, and errored packets and counters statistics
E.3.10.4
E
WAN (Managed Switch Mode)
Review Managed Switch Mode WAN/Interface/Satellite
received, transmitted, and errored packets and counters
statistics
E.3.10.5
F
Compression
Review payload and header compression statistics
E.3.10.6
G
QoS
Review Quality of Service statistics
E.3.10.7
H
PTP
Access pages to review LAN/WAN/PTP Engine statistics
E.3.10.8
I
CPU
Review CPU total, kernel and apps usage statistics
E.3.10.9
J
Reset Counters
Clear and reset all counters
E.3.10.10
Press a hot key to access a nested statistics page submenu. See the specified appendix section
for further information. Otherwise, press [ESC] to return to the Home menu.
E–75
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.1 Home > Statistics > Ethernet Submenu
Open the nested Ethernet submenu from the Statistics submenu:
Hot
Key
Page / Dialog Window
Description / Option Entry
A
Rx Statistics
See Sect. E.3.10.1.1
B
Tx Statistics
See Sect. E.3.10.1.2
C
Error Statistics
See Sect. E.3.10.1.2
D
Clear IP Statistics
Use the ↑↓ arrow keys to select Cancel or Clear
Press a hot key to open a statistics page or dialog window. See the specified appendix section
for further information. Otherwise, press [ESC] to return to the nested Ethernet submenu.
E–76
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.1.1 Home > Statistics > Ethernet > Rx
Open the scrollable Rx statistics page from the nested Ethernet submenu. Use the ↑↓ arrow
keys to scroll through the available entries. You may also select a header (e.g., <Port 1>) and
press [ENTER] to view, in a standalone window, a specific set of statistics as shown in this
example:
Press [ESC] to return to the nested Ethernet submenu.
E–77
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.1.2 Home > Statistics > Ethernet > Tx
Open the scrollable Tx statistics page from the nested Ethernet submenu. Use the ↑↓ arrow
keys to scroll through the available entries. You may also select a header (e.g., <Port 1>) and
press [ENTER] to view, in a standalone window, a specific set of statistics as shown in this
example:
Press [ESC] to return to the nested Ethernet submenu.
E–78
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.1.3 Home > Statistics > Ethernet > Errors
Open the scrollable Error statistics page from the nested Ethernet submenu. Use the ↑↓ arrow
keys to scroll through the available entries. You may also select a header (e.g., <Port 1>) and
press [ENTER] to view, in a standalone window, a specific set of statistics as shown in this
example:
Press [ESC] to return to the nested Ethernet submenu.
E–79
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.2 Home > Statistics > Router
Open the Router statistics page from the Statistics submenu:
Hot
Key
A
Dialog Window
Option Entry
Router Clear Stats
Use the ↑↓ arrow keys to select Cancel or Clear
Press the hot key to open the dialog window. Otherwise, press [ESC] to return to the Statistics
submenu.
E–80
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.3 Home > Statistics > Managed Switch
Open the Managed Switch statistics page from the Statistics submenu:
Hot
Key
A
Dialog Window
Option Entry
Router Clear Stats
Use the ↑↓ arrow keys to select Cancel or Clear
Press the hot key to open the dialog window. Otherwise, press [ESC] to return to the Statistics
submenu.
E–81
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.4 Home > Statistics > WAN (Router Mode)
Open the scrollable WAN (Router Mode) statistics page from the Statistics submenu. Otherwise,
press [ESC] to return to the Statistics submenu.
E–82
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.5 Home > Statistics > WAN (Managed Switch Mode)
Open the scrollable WAN (Managed Switch Mode) statistics page from the Statistics submenu:
Hot
Key
A
Dialog Window
Option Entry
Clear Stats
Use the ↑↓ arrow keys to select Cancel or Clear
Press the hot key to open the dialog window. Otherwise, press [ESC] to return to the Statistics
submenu.
E–83
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.6 Home > Statistics > Compression
Open the Compression statistics page from the Statistics submenu:
Hot
Key
Page / Dialog Window
Option Entry / Description
A
Compression Clear Counters
Use the ↑↓ arrow keys to select Cancel or Clear
B
View Statistics Table
See Sect. E.3.10.6.1
Press a hot key to open the dialog window or view the statistics table. Otherwise, press [ESC] to
return to the Statistics submenu.
E–84
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.6.1 Home > Statistics > Compression > Table View
Open the scrollable Compression statistics table from the nested Compression submenu.
Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header
(e.g., <Route Index 1>) and press [ENTER] to view, in a standalone window, a specific set of
statistics as shown in this example:
Press [ESC] to return to the Compression page.
E–85
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.7 Home > Statistics > QoS
Open the QoS statistics page from the Statistics submenu:
Hot
Key
Page / Dialog Window
Option Entry / Description
A
QoS Clear Counters
Use the ↑↓ arrow keys to select Cancel or Clear
B
View Statistics Table
See Sect. E.3.10.7.1
Press a hot key to open the dialog window or view the table. Otherwise, press [ESC] to return to
the Statistics submenu.
E.3.10.7.1 Home > Statistics > QoS > Table View
Open the scrollable QoS statistics table from the nested QoS submenu.
Use the ↑↓ arrow keys to scroll through the available entries. You may also select a header
(e.g., <QoS Index 1>) and press [ENTER] to view, in a standalone window, a specific set of
statistics as shown in this example:
Press [ESC] to return to the Compression page.
E–86
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.8 Home > Statistics > PTP
Open the PTP statistics page from the Statistics submenu:
Hot
Key
Page
Description
A
LAN Details
See Sect. E.3.10.8.1
B
WAN Details
See Sect. E.3.10.8.2
Press a hot key to view a statistics page. Otherwise, press [ESC] to return to the Statistics
submenu.
E–87
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.8.1 Home > Statistics > PTP > LAN Details
Open the LAN Details statistics page from the PTP page. Otherwise, press [ESC] to return to the
PTP page.
E.3.10.8.2 Home > Statistics > PTP > WAN Details
Open the WAN Details statistics page from the PTP page. Otherwise, press [ESC] to return to the
PTP page.
E–88
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.10.9 Home > Statistics > CPU
Open the CPU statistics page from the Statistics submenu. Otherwise, press [ESC] to return to
the Statistics submenu.
E.3.10.10
Home > Statistics > Clear All Counters
Open the Clear All Counters page from the Statistics submenu:
Hot
Key
A
Dialog Window
Option Entry
Clear All Counters
Use the ↑↓ arrow keys to select Cancel or Clear
Press the hot key to open the dialog window. Otherwise, press [ESC] to return to the Statistics
submenu.
E–89
CDM-625 Advanced Satellite Modem
Appendix E
Revision 15
MN-CDM625
E.3.11 Home > Contact Page
Open the read-only Contact information page from the Home menu. Use this page to retrieve
Comtech EF Data contact information. Otherwise, press [ESC] to return to the Home menu.
E–90
Appendix F. CDM-625 ODU
(TRANSCEIVER, BUC, LNB)
OPERATION
F.1 Overview
The CDM-625 Advanced Satellite Modem permits configuration, monitoring, and control of
Comtech EF Data ODUs (Outdoor Units) either in standalone or 1:1 redundant configuration.
The following ODUs are compatible under 70/140 MHz operation:
•
CSAT-5060 series (5 to 25, 50 & 100 Watts) C-Band Transceivers
•
KST-2000A (LNA) Ku-Band Satellite Transceiver
•
KST-2000B (LNB) Ku-Band Satellite Transceiver
Under L-Band operation, ODU refers to use of a Comtech EF Data LPOD Outdoor Amplifier /
Block Up Converter (BUC), or an LNB (Low-Noise Block Down Converter).
For either 70/140 MHz or L-Band operation, you can fully monitor and control ODU operations
in the following ways:
•
By using the CDM-625 front panel keypad and VFD. The Front Panel ODU menu branch
allows you to configure power supplies, a 10 MHz reference, and low/high current alarm
thresholds for the BUC and LNB.
LO (Local Oscillator) menus allow you to set up the upconversion and downconversion
settings for the BUC and LNB so that you can view the satellite frequencies as well as the
modem IF input/output frequencies.
•
By using ODU remote commands through Serial-based Remote Product Management with
the CSAT-5060 or KST-2000A/B Transceiver, or the LPOD.
•
By using the SNMP Interface with the CSAT-5060 or KST-2000A/B Transceiver MIB.
F–1
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
•
By using the CDM-625 Web Server (HTTP) Interface (excluding the LPOD).
•
By using the CDM-625 Telnet Command Line Interface for CSAT-5060 Transceiver operation
(excluding the KST-2000A/B Transceiver or the LPOD).
F.2 ODU Remote Control Address Setup
The ODU, as connected to a CDM-625 through FSK (Frequency Shift Keying), can be remotely
monitored and controlled through the use of ODU commands and queries issued via serial
remote control or with the Telnet Command Line Interface (CLI).
The address of the ODU is set up as follows:
•
•
For Local-End ODUs:
o
Use the Modem’s RC Address + 1 for a Standalone Unit or the Online Unit in a 1:1
Redundancy System;
o
Use the Modem’s RC Address + 2 for the Offline Unit in a 1:1 Redundancy System.
For Distant-End ODUs in an EDMAC setup:
•
•
Chapter 11. EDMAC CHANNEL
Appendix D. REMOTE CONTROL
o
Use the EDMAC Slave Address (ESA) Range +4 for Standalone Unit or the Online Unit in a
1:1 Redundancy System;
o
Use the EDMAC Slave Address (ESA) Range +5 for the Offline Unit in a 1:1 Redundancy
System.
F–2
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.3 ODU Operations via the CDM-625 Front Panel
1. The ODU menu branch is accessible from the CDM-625 front panel menu only
when the CDM-625 detects the presence of an installed ODU.
2. This appendix deals strictly with ODU operations. Chapter 5. FRONT PANEL
OPERATION provides detailed information for any CDM-625 menu operations
or selections not otherwise specified here.
F.3.1
CDM-625 Front Panel Operation Overview
See Chapter 5. FRONT PANEL OPERATION for an in-depth explanation of the
function and operation of the CDM-625 front panel.
Feature
See
Chapter
Section...
Description
Function
1
LED Indicators
The LEDs indicate, in a summary fashion, the status of the modem.
5.1.1
2
Keypad
The keypad comprises six individual keyswitches. The keys have a
positive ‘click’ action that provides tactile feedback. Enter data via the
keypad. Data, prompts, and messages are displayed on the VFD.
5.1.2
3
Vacuum
Fluorescent
Display (VFD)
The VFD is an active display showing two lines of 40 characters
each. It produces a blue light with adjustable brightness. Nested
menus display all available options and prompt you to carry out a
required action.
5.1.3
Figure F-1. CDM-625 Front Panel Features
Use the CDM-625 front panel keypad and Vacuum Fluorescent Display (Figure F-1) to configure,
monitor, and control ODU operation. Nested menus display all available options and prompt you
to carry out any required action(s) (Figure F-2).
F–3
CDM-625 Advanced Satellite Modem
Appendix F
F.3.2
Revision 15
MN-CDM625
CDM-625 Front Panel Menus – ODU Menu Hierarchy
Figure F-2 identifies the CDM-625 front panel menu hierarchies allocated to the configuration,
monitor, and control of a Comtech EF Data ODU. More specifically, menu branches that
incorporate ODU operations are shown in bold; menu content that is dedicated to ODU
operations is additionally italicized.
Figure F-2.CDM-625 Front Panel ODU Operation Menu Tree – (FW Ver. 2.3.1)
F–4
CDM-625 Advanced Satellite Modem
Appendix F
F.3.3
Revision 15
MN-CDM625
SELECT: (Main) Menu Overview
SELECT: Configuration Test Monitor
Info Store/Ld Utility ODU FAST
()
Press ENTER or CLEAR to immediately access the SELECT: menu screen from the opening screen.
From any nested menu, press CLEAR repeatedly until this screen reappears.
The table that follows identifies each menu branch available from the SELECT: menu and its
content section in Chapter 5. FRONT PANEL OPERATION. ODU M&C is available for selection as
noted:
Menu Branch
Chapter 5 Sect.
Function
Configuration
5.2.1
Use to fully configure the modem and the ODU alarm masks.
The Tx, Rx, and Mask submenus incorporate ODU functionality. For
detailed information see the following sections in this appendix:
• F.3.3.1.1 CONFIG: Tx →Freq and CONFIG: Rx →Freq
• F.3.3.1.2.1 CONFIG: Mask →BUC
• F.3.3.1.2.2 CONFIG: Mask→LNB
Test
5.2.2
Use to configure the modem into one of several Test modes, and
configures/monitors the BER Tester.
Monitor
5.2.3
Use to monitor the current status of the modem and ODUs and view
the log of stored events for the modem.
For detailed information, see to Sect. F.3.3.2 (SELECT: MONITOR)
Live-Alarm Menus in this appendix.
Info
5.2.4
(Information) Use to view information on the modem without having to
access the Configuration screens.
Store/Ld
5.2.5
(Store/Load) Use to store and retrieve up to 10 different modem
configurations.
Utility
5.2.6
Use to perform miscellaneous functions – e.g., setting the Real-Time Clock,
adjusting the VFD brightness, etc.
ODU
5.2.7 (Summary)
(Outdoor Unit) For detailed information, see Sect. F.3.3.3 (SELECT:
ODU) Menu Branches in this appendix.
FAST
5.2.8
(Fully Accessible System Topology) Use to configure available options –
e.g., extended data rates, interfaces, etc. Contact Comtech EF Data
Product Support for details.
From the top SELECT: menu, use the ◄ ►arrow keys to select Configuration or ODU, and then
press ENTER.
F–5
CDM-625 Advanced Satellite Modem
Appendix F
F.3.3.1
Revision 15
MN-CDM625
(SELECT: CONFIGURATION) Menu Branches
CONFIG: All Mode Tx
CnC EDMAC Misc Mask
Rx Clocks D&I/ACM
Remote IP
()
Use the ◄ ►arrow keys to select Tx, Rx, or Mask, and then press ENTER.
F.3.3.1.1
CONFIG: Tx  Freq and CONFIG: Rx  Freq Submenus
Tx-IF Frequency:
1750.0000 MHz
(LO:12500 MHz Sat:14250.0000 MHz) ()
Rx-IF Frequency:
1200.0000 MHz
(LO:12500 MHz Sat:13700.0000 MHz) ()
When you use the ODU menus to configure a BUC or LNB LO-frequency, the CONFIG: Tx→Freq
and CONFIG: Rx→Freq menu screens provide supplemental information on the bottom line. As
you edit the IF frequency, the Satellite frequency updates accordingly.
Satellite frequency = LO ± IF frequency, where the ± sign is determined
by the LO mix setting:
•
High-sided mix [–] (includes a spectral inversion);
•
Low-sided mix [+].
To edit the Tx-IF or Rx Frequency, use the ◄ ►arrow keys to select a digit to edit, and then use
the ▲▼ arrow keys to change that digit. The available ranges are 50-180 MHz, and 950-2000
MHz (L-Band) (FAST option). The resolution is 100Hz. Press ENTER when done.
F.3.3.1.2
(SELECT: CONFIGURATION) Mask Submenus
The Mask submenus allow you to selectively mask (ignore) or make active various alarms and
traffic conditions that are monitored by the modem.
Alarm Masks: AIS Buffer Ref RxIF TxClk
TxSat RxSat Terr ROp BUC LNB CEX
()
Use the ◄ ►arrow keys to select BUC or LNB, and then press ENTER.
F–6
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.3.3.1.2.1 CONFIG: Mask  BUC
BUC alarm = Active
Attach to Tx alarm = No
(Active,Mask)
(Yes,No)()
When using L-Band, a Block Up Converter (BUC) may be included in the system. A ‘smart’ BUC
may be monitored and/or controlled via the modem via FSK (Frequency-Shift Keying control).
For a modem in a 1:1 redundancy setup, the fault indications must be customized for
the physical setup:
1.
Two modems, two LNBs in parallel – If a fault occurs on the active
modem/BUC pair and switchover is desired, the BUC mask should be configured
as Attach to Tx alarm = Yes.
2.
The more common redundancy setup is Two modems in parallel, one BUC – If a
fault occurs on the active modem, switchover is desired. But, if a fault occurs on
the BUC yet a switchover of modems does not fix the problem, then switchover
should not occur and the BUC mask should be configured as Attach to Tx alarm
= No.
If the system has no redundancy and was attached to an external audio alarm,
Attach to Tx alarm = Yes would indicate that a BUC fault has occurred, as the
fault would be included in the FORM C alarms.
First, use the ▲▼ arrow keys to select BUC Alarm or Attach to Tx alarm. Then:
•
For BUC Alarm, use the ▲▼ arrow keys to select Active or Masked.
•
For Attach to Tx alarm, use the ▲▼ arrow keys to select Yes or No.
Press ENTER when done.
F–7
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.3.3.1.2.2 CONFIG: Mask  LNB
LNB alarm = Active
Attach to Rx alarm = No
(Active,Mask)
(Yes,No)()
When using L-Band, a Low-Noise Block Down Converter (LNB) may be included in the system. It
cannot be monitored and/or controlled by the modem, except for the power supply values.
For a modem in a 1:1 redundancy setup, the fault indications must be customized for
the physical setup:
1.
Two modems, two LNBs in parallel – If a fault occurs on the active modem/LNB
pair and switchover is desired, the LNB mask should be configured as Attach to
Rx alarm = Yes.
2.
The more common redundancy setup is Two modems in parallel, one LNB – If a
fault occurs on the active modem, switchover is desired. But, if a fault occurs on
the LNB, a switchover of modems might or might not fix the problem. If
switchover should take place, the LNB mask should configured as Attach to Rx
alarm = Yes.
If the system has no redundancy and was attached to an external audio alarm,
Attach to Rx alarm = Yes would indicate that a LNB fault has occurred, as the
fault would be included in the FORM C alarms.
First, use the ◄ ►arrow keys to select LNB Alarm or Attach to Rx alarm. Then:
•
For LNB Alarm, use the ▲▼ arrow keys to select Active or Masked.
•
For Attach to Rx alarm, use the ▲▼ arrow keys to select Yes or No.
Press ENTER when done.
F–8
CDM-625 Advanced Satellite Modem
Appendix F
F.3.3.2
Revision 15
MN-CDM625
(SELECT: MONITOR) Live-Alarms Menu
Live
Alarms
Unit=None
Rx=Demod Lock
Live
Alarms
BUC=None
LNB=None
Net=None
Tx=No Clock ()
()
Six alarm types are provided across two screens. The last two alarm types (on the second
screen) pertain to ODU operation as shown in the preceding examples.
Use the ▲▼ arrow keys to navigate between these read-only pages. The highest priority alarms
currently active for each of the ODU alarm types are as follows:
ALARM TYPE
BUC
BUC current
BUC voltage
BUC checksum or bad comms
BUC PLL
BUC temperature
LNB
LNB current
LNB voltage
F–9
CDM-625 Advanced Satellite Modem
Appendix F
F.3.3.3
Revision 15
MN-CDM625
(SELECT:) ODU Menu Branches
ODU: BUC:PwrSupply+Ref
LNB:PwrSupply+Ref
FSK-control ()
Use the ◄ ►arrow keys to select BUC:PwrSupply+Ref, LNB:PwrSupply+Ref, or FSK-control, and
then press ENTER:
ODU Menu Branch
Sect.
Nested Menu Function
BUC:PwrSupply+Ref
F.3.3.3.1
Provides menus to enter a Tx LO frequency, and to control a 10MHz
reference and for Power supply control and alarm limits.
LNB:PwrSupply+Ref
F.3.3.3.2
Provides menus to enter an Rx LO frequency, and to control a 10MHz
reference and for Power supply control and alarm limits.
FSK-control
F.3.3.3.3
(Frequency Shift Keying control) Provides menus to monitor and
control CSAT-5060 OR KST-2000A/B or BUC settings, and LPOD
settings via Advanced FSK. The appearance of, and the functional
selections available from this nested menu are dependent on the Tx
frequency employed – 70/140 versus L-Band.
F.3.3.3.1
ODU: BUC:PwrSupply+Ref (Power Supply and Reference)
BUC control/monitor (non-FSK):
PSU-and-10MHz
LO-freq PSUmonitor ()
The modem provides DC power and a 10MHz reference that may be used by a BUC. Use the ◄
►arrow keys to select PSU-and-10MHz, LO-Freq, or PSUmonitor, and then press ENTER.
F.3.3.3.1.1 ODU: BUC:PwrSupply+Ref  PSU-and-10MHz Parameters
BUC supply=N/I
10MHz-ref:Off (Off,On)
Alarm limits, from 0.0 to 2.0 amps ()
Use the ◄ ►arrow keys to select BUC Supply, 10MHz-ref, or Alarm Limits, and then use the
▲▼ arrow keys to select a setting:
Selection
Setting
BUC supply
Indicates installation state, e.g., N/I =- Not Installed.
10MHz-ref
Alarm Limits
Set the 10MHz Reference as Off or On.
A BUC will not transmit without a 10MHz reference.
Use the ◄ ►arrow keys to select a digit to edit, and then use the ▲▼ arrow keys to
change that digit. Valid range, in Amps, is 0.0 to 4.0.
Press ENTER when done.
F–10
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.3.3.3.1.2 ODU: BUC:PwrSupply+Ref  LO Freq (Local Oscillator
Frequency)
BUC-LO Frequency= 00000 MHz
Mix= High [-] (Hi,Lo)
()
Use the ◄ ►arrow keys to select BUC-LO (Local Oscillator) Frequency for the upconversion, or
Mix to set the polarity for the upconversion mix in the BUC.
On the top line – To set the BUC-LO Frequency, use the ◄ ►arrow keys to select a digit to edit,
and then use the ▲▼ arrow keys to change that digit. The valid LO range is 3000 to 65000 MHz.
Entering a non-zero value for BUC LO causes the Tx-IF frequency menu to show LO and Satellite
frequencies (satellite frequency = LO frequency ± modem frequency).
Press ENTER when done.
On the bottom line – To set the Mix polarity, use the ▲▼ arrow keys to set polarity as Hi (to
indicate a high side, inverting mix) or Lo (to indicate a low side, non-inverting mix).
Press ENTER when done.
F.3.3.3.1.3 ODU: BUC:PwrSupply+Ref  PSUmonitor
BUC Power Supply:
0000mA, 00.0V
Use this read-only display to view the power supply current and voltage information. Press
ENTER or CLEAR to return to the previous menu.
F–11
CDM-625 Advanced Satellite Modem
Appendix F
F.3.3.3.2
Revision 15
MN-CDM625
ODU: LNB:PwrSupply+Ref (Power Supply and Reference)
LNB control/monitor:
PSU-and-10MHz
LO-freq
PSUmonitor ()
The modem can supply DC power to an LNB connected to the Type ‘N’ rear panel Rx connector.
It can also supply a 10 MHz reference for a phase-locked LNB. Use the ◄ ►arrow keys to select
PSU-and-10MHz, LO-freq, or PSUmonitor, and then press ENTER.
F.3.3.3.2.1 ODU: LNB:PwrSupply+Ref  PSU-and-10MHz
LNB: Voltage=Off
10MHz:Off (Off,On)
Alarm limits, from 000 to 500 mA ()
Use the ◄ ►arrow keys to select Voltage, 10MHz, or Alarm Limits. Then, use the ▲▼ arrow
keys to edit that setting:
Selection
Setting
Voltage
Select Off, 13V, 18V, or 24V
10MHz
Set the 10MHz Reference as Off or On.
Alarm Limits
Use the◄ ►arrow keys to select a digit to edit, and then use the ▲▼ arrow keys to
change that digit. Valid range, in mA, is 000 to 500.
Press ENTER when done.
F.3.3.3.2.2 ODU: LNB:PwrSupply+Ref  LO-Freq (Local Oscillator
Frequency)
LNB-LO: Frequency= 00000 MHz
Mix= High [-] (Hi,Lo)
()
Use the ◄ ►arrow keys to select the LNB-LO (Local Oscillator) Frequency for the
downconversion, or Mix to set the polarity for the downconversion mix in the LNB.
On the top line – To set the LNB-LO Frequency, use the ◄ ►arrow keys to select a digit to edit,
and then use the ▲▼ arrow keys to change that digit. The valid LO range is 3000 to 65000 MHz.
Entering a non-zero value for LNB LO causes the Rx-IF frequency menu to show LO and Satellite
frequencies (satellite frequency = LO frequency ± modem frequency).
Press ENTER when done.
On the bottom line – To set the Mix polarity, use the ▲▼ arrow keys to set polarity as Hi (to
indicate a high side, inverting mix) or Lo (to indicate a low side, non-inverting mix).
Press ENTER when done.
F–12
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.3.3.3.2.3 ODU: LNB:PwrSupply+Ref  PSUmonitor
LNB Power Supply [Off]:
0000mA, 00.0V
This read-only display shows the LNB power supply information. Press ENTER or CLEAR to return
to the previous menu.
F.3.3.3.3
ODU: FSK-control
Comtech EF Data ODUs (CSAT, KST, or LPOD), when connected to a CDM-625 through Frequency
Shift Keying (FSK), can be remotely monitored and controlled by using the CDM-625 front panel,
Web Server interface, or by using remote commands and queries through Serial or Telnet
Remote Product Management. In order to facilitate remote M&C, the ODU address is set up as
follows:
•
•
For Local-End ODUs:
o
Use the Modem’s RC Address + 1 for a Standalone Unit or the Online Unit in a 1:1
Redundancy System;
o
Use the Modem’s RC Address + 2 for the Offline Unit in a 1:1 Redundancy System.
For Distant-End ODUs in an EDMAC setup:
•
•
Chapter 11. EDMAC CHANNEL
Appendix D. REMOTE CONTROL
o
Use the EDMAC Slave Address (ESA) Range +4 for Standalone Unit or the Online Unit in a
1:1 Redundancy System;
o
Use the EDMAC Slave Address (ESA) Range +5 for the Offline Unit in a 1:1 Redundancy
System.
The appearance of the ODU: FSK-control screen adjusts automatically to the mode of operation:
70/140 MHz or L-Band.
When the Tx frequency is 70/140 MHz – Communication with a Comtech EF Data CSAT or KST
transceiver is achieved using a low-speed, half-duplex FSK link over the Rx IF port, with a carrier
frequency around 2.7 MHz.
With FSK communication disabled, the ODU: FSK-control screen appears as shown here:
ODU Control:
FSK=Off
(Off,On)
ODU Type: C/KST (C/KST, 2CSATS)
()
F–13
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
To enable FSK, on the top line use the ◄ ►arrow keys to select FSK, and then use the ▲▼
arrow keys to set control as On.
Press ENTER when done.
Once FSK is enabled, the modem attempts to communicate with the installed transceiver(s).
Once communications are established, the bottom line of the ODU: FSK-control screen updates
to show the attached – and therefore controllable via FSK – transceiver(s), as per the following
examples:
ODU Control:
FSK=Off
(Off,On)
ODU Type: CSAT (C/KST, 2CSATS)
()
ODU Control:
FSK=Off
(Off,On)
ODU Type: KST (C/KST, 2CSATS)
()
At this time, use the ◄ ►arrow keys to navigate to the bottom line, and then use the ▲▼
arrow keys to select (where appropriate), CSAT, 2CSATs, or KST.
Press ENTER when done.
•
•
•
Sect. F.3.3.3.3.1 ODU: FSK-control  CSAT
Sect. F.3.3.3.3.2 ODU: FSK-control  2CSATs (Redundant configuration)
Sect. F.3.3.3.3.3 ODU: FSK-control  KST
When the Tx frequency is L-Band – Communication with a ‘smart’ BUC is achieved using a lowspeed, half-duplex FSK link over the Tx IF port, with a carrier frequency around 650 kHz.
With FSK communication disabled, the ODU: FSK-control screen appears as shown here:
ODU Control:
ODU Type: None
FSK=Off
(Off,On)
(due to Tx freq) ()
Use the ◄ ►arrow keys to select FSK control, and then use the ▲▼ arrow keys to set control as
On, and then press ENTER. Once FSK is On, the ODU type is fixed as “BUC” and the screen
appears as shown here:
ODU Control:
ODU Type: BUC
FSK=On
(Off,On)
(due to Tx freq) ()
Sect. F.3.3.3.3.4 ODU: FSK-control  BUC
F–14
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.3.3.3.3.1 ODU: FSK-control  CSAT
The CSAT menus that follow assume that you have already selected, and the
system has identified, a (standalone) CSAT connected via the rear panel Rx IF port.
When the following menu selections are made:
•
•
•
ODU: FSK-control  CSAT
ODU: FSK-control  2CSATs  CSAT#1
ODU: FSK-control  2CSATs  CSAT#2
You are directed to a common submenu branch:
CSAT-5060/050 V1.02
Configuration Monitor
Alarms Info()
For clarity, this common submenu branch and its nested menus are defined in this
section. (CSAT#X denotes CSAT#1 or CSAT#2.)
Use the ◄ ►arrow keys to select Configuration, Monitor, Alarms, or Info, and then press
ENTER.
F.3.3.3.3.1.1 ODU: FSK-control  CSAT (2CSATs  CSAT #X) 
Configuration
Configuration settings:
Tx
Rx
LNA
Misc
()
Use the ◄ ►arrow keys to select Tx, Rx, LNA, or Misc, and then press ENTER.
F.3.3.3.3.1.1.1
ODU: FSK-control  CSAT (2CSATs  CSAT #X) 
Configuration  Tx
Tx: Fq=6247.0 MHz Att=23.00 dB Amp=On
Mute=Unmuted Slope: xxx, Cal
()
Use the ◄ ►arrow keys to select the setting to edit, and then use the ▲▼ arrow keys to edit
that setting:
Selection
Setting
Fq
(Tx Frequency) 3625-4200 MHz, in steps of 1.0 or 2.5 MHz
At
(Tx Attenuation ) 0 to 25 dB, in increments of .25dB
Amp
(Amplifier setting ) Off or On
F–15
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
Selection
Setting
Mute
(Mute setting) Muted (i.e., Tx off) or Unmuted (i.e., Tx on)
Slope
Manual (0.0 to 1.0, in increments of 0.1) or Calibrated
Press ENTER to save, or CLEAR to cancel and return to the previous menu.
F.3.3.3.3.1.1.2
ODU: FSK-control  CSAT (2CSATs  CSAT #X) 
Configuration  Rx
Rx: Fq=6427.0 MHz Att=23.00 dB
Mute=Unmuted
Slope:x.x, Cal()
Use the ◄ ►arrow keys to select the setting to edit, and then use the ▲▼ arrow keys to edit
that setting:
Selection
Setting
Fq
(Rx Frequency) 3625-4200 MHz, in steps of 1.0 or 2.5 MHz.
Att
(Rx Attenuation) 0 to 25 dB, in increments of .25dB.
Mute
(Mute setting) Muted (i.e., Tx off) or Unmuted (i.e., Tx on).
Slope
Manual (0.0 to 1.0, in increments of 0.1) or Calibrated.
Press ENTER when done.
F.3.3.3.3.1.1.3
ODU: FSK-control  CSAT (2CSATs  CSAT #X) 
Configuration  LNA
LNA: State=On Calibrate-LNA-Current=N
Current-Window=50% Fault-Logic=Summary
Use the ◄ ►arrow keys to select the setting to edit, and then use the ▲▼ arrow keys to edit
that setting:
Selection
Setting
State
(LNA State) Off or On. This controls whether or not the CSAT provides LNA
Power via the Receive RF Cable.
Calibrate-LNA-Current
Select YES and press ENTER to calibrate the LNA current for use with the
Current-Window function. (Default is NO.)
Current-Window:
A value from 20% to 50% defines the allowable LNA Current change before
declaring a fault. Select 99% to disable the Current Window function.
F–16
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
Selection
Setting
Fault-Logic:
Summary or No-Summary. This controls whether or not an LNA CurrentWindow fault activates the Summary Fault Relay, and further permits you to
select whether or not to switch the Online/Offline CSAT in the event of an LNA
Current-Window fault.
Press ENTER when done.
F.3.3.3.3.1.1.4
ODU: FSK-control  CSAT (2CSATs  CSAT #X) 
Configuration  Misc
Misc: Cold-Start=Disabled
AFR=Enable
Xref=No
Ref-Adj=087 Sync-Clk=Y ()
Use the ◄ ►arrow keys to select the setting to edit, and then use the ▲▼ arrow keys to edit
that setting:
Selection
Setting
Cold-Start
If enabled, when the CSAT is powered on, the IF and RF outputs remain muted for 15
minutes.
AFR
(Auto Fault Recovery) This defines how a CSAT reacts to momentary fault conditions:
Off: CSAT mutes when faulted and remain muted.
On: CSAT mutes when faulted, but unmute after the fault goes away.
Xref
(External Reference) The CSAT automatically locks to an external 5 or 10 MHz
reference independent of the state of this selection. This selection determines whether
or not the Summary Fault Relay activates if the CSAT loses lock with the external
reference.
Ref-Adj
Select a value for the Internal 10MHz Reference setting from 000 to 255.
NOTE: The Internal Reference is set in the factory to be very accurate with the default
setting of 087. This setting is provided to compensate for the long-term frequency drift
of the oscillator.
Sync-Clk
(Default is NO.) Selecting YES and pressing ENTER causes the CSAT RTC (RealTime Clock) to be synchronized to the Modem RTC.
Press ENTER when done.
F–17
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.3.3.3.3.1.2 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Monitor
Monitor:
Tx
Rx
Misc
Power-Supplies
()
To view these read-only displays, use the ◄ ►arrow keys to select Tx, Rx, Misc, or PowerSupplies, and then press ENTER.
Press ENTER or CLEAR after viewing any Monitor screen to return to the previous menu.
ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Monitor  Tx
Tx: SynTune = 09.6 VDC
IFLO = 11.1 VDC
Power = <24 dBm
Temp = 26 C
ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Monitor  Rx
Rx: SynTuneE = 01.4 VDC
IFLO = 11.2 VDC
Temp = 26 C
ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Monitor  Misc
Misc: Ref-Tune = 03.0 VDC
LNA = 00.05 mA
Fan = 550 mA
ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Monitor  PowerSupplies
24V=24.1 VDC
20V=21.2 VDC
12V=12.5VDC
10V=10.2VDC
+5V=+5.4VDC
-5V=-5.3VDC
F.3.3.3.3.1.3 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Alarms
Alarms:
Current-Alarms
Stored-Alarms ()
Use the ◄ ►arrow keys to select Current-Alarms or Stored-Alarms, and then press ENTER.
F.3.3.3.3.1.3.1
ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Alarms
Current-Alarms
Current Status: Tx = OK
Power-Supply = OK
F–18
Rx = OK
Misc = OK
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
This screen is read-only. Press ENTER or CLEAR to return to the previous menu.
F.3.3.3.3.1.3.2
ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Alarms
 Stored-Alarms
As stored events are compiled, the screen shows:
Reading Stored Faults..... Please Wait
Once the events are compiled, the Stored Alarms screen appears as shown here:
Stored Alarms: Clear-All: No (No,Yes)
IF #84: 10/14/04 12:52:08 Power On
Use the ◄ ►arrow keys to select between the log entries and the Clear-All option.
To view a log entry: With the cursor on the entry number, use the ▲▼ arrow keys to view
through the entries. Up to 99 entries are stored. Each entry provides the following information:
Item
Comments
Entry type
•
•
•
Entry number
00 through 99
Date
European Day-Month-Year (DD-MM-YY) format
Time
Hour:Minute:Second (HH:MM:SS) format
Description of information / fault
Example: Power On
IF = Information
FT = Fault
OK = Fault cleared
To clear the Stored Alarms Log, use the ◄ ►arrow keys to select Clear-All, and then use the
▲▼ arrow keys to select Yes. Press ENTER to clear the log.
F.3.3.3.3.1.4 ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Info
Info:
Model
Tx
Rx
Misc
LNA
()
These read-only screens provide the ODU’s current configuration information without risking
inadvertent changes.
Use the ◄ ►arrow keys to select Model, Tx, Rx, Misc, or LNA, and then press ENTER.
F–19
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
After viewing any CSAT/CSAT#X Info screen, press ENTER or CLEAR to return to the previous
menu.
ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Info  Model
Model:
S/N:
CSAT-5060/025
010300346
V2.19
Use this screen to view the CSAT model number, its operating firmware, and the unit serial
number.
ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Info  Tx
Info:
Tx:Off
Amp:Off
6427.0MHz
Unmuted
23.00dB
Slope:0.3
Use this screen to view the Tx state, Frequency, Tx Attenuation, Amplifier state, Tx Mute state
and Tx Slope adjustment (value or CAL).
ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Info  Rx
Info:
Rx:ON
Ref:087
3400.0MHz
Unmuted
18.00dB
Slope:0.2
Use this screen to view the Rx state, Rx Frequency, Rx Attenuation, Rx Reference, Rx Mute state
and Rx Slope adjustment (value or CAL).
ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Info  Misc
Info:
Cold-Start:Off
Auto-Fault-Recovery:Summary
(EC)
Use this screen to view the Cold Start and Auto Fault Recovery settings.
ODU: FSK-control  CSAT (2CSATs  CSAT #X)  Info  LNA
Info:
LNA:Off
Fault-Logic:Summary
Window:48%
(EC)
Use this screen to view the Low Noise Amplifier operational settings.
F–20
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.3.3.3.3.2 ODU: FSK-control  2CSATs
The menus that follow assume that you have selected and the system has
identified two CSATs connected via the Rx IF port and the ODU Redundancy
Controller Box.
1:1 Monitor & Control
CSAT#1 CSAT#2 Redundancy-Box
()
Use the ◄ ►arrow keys to select CSAT#1, CSAT#2, or Redundancy-Box, and then press ENTER.
F.3.3.3.3.2.1 ODU: FSK-control  2CSATs  CSAT#X
This submenu and its nested menus are identical in form and function for the
following menu structures:
ODU: FSK-control  CSAT 
ODU: FSK-control  2CSATs  CSAT#X (where CSAT#X = CSAT#1, CSAT#2)
CSAT-5060/050 V1.02
Configuration Monitor
Alarms
Info ()
Use the ◄ ►arrow keys to select Configuration, Monitor, Alarms, or Info, and then press
ENTER.
Sect. F.3.3.3.3.1 ODU: FSK-control  CSAT for complete information for these
nested menu choices.
F.3.3.3.3.2.2 ODU: FSK-control  2CSATs  Redundancy-Box
Red: Online: ODU2 Mode:Auto
TxSw:OK RxSw:OK
5V:5.0
Switch:N
12V:12.0
This menu provides operating mode and switchover controls. You may also view the following
read-only information here:
•
Which of the two CSATs in currently online (ODU1 or ODU2);
•
Waveguide Switch Tx and Rx status: OK or Ft (fault);
•
Redundancy Controller Box 5V and 12V values (to aid trouble-shooting system problems).
To set Operating Mode, use the ◄ ►arrow keys to select Mode, and then use the ▲▼ arrow
keys to select this mode as Auto or Manual:
F–21
CDM-625 Advanced Satellite Modem
Appendix F
•
Revision 15
MN-CDM625
AUTO mode – When the Online ODU faults, the switchover is done automatically to replace
the faulty unit.
If the ODU Redundancy system is in AUTO mode, a ‘forced switch-over’ can
only occur if the currently OFFLINE unit is fault-free.
•
MANUAL mode – If selecting the mode as Manual, there is no automatic switchover if a
fault occurs.
To force a switchover to the other CSAT unit, use the ◄ ►arrow keys to select Switch: N, and
then use the ▲▼ arrow keys to select Y (Yes). Press ENTER when done.
F–22
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.3.3.3.3.3 ODU: FSK-control  KST
KST Select:
Configuration
Information
Alarms ()
Use the ◄ ►arrow keys to select Configuration, Information, or Alarms, and then press ENTER.
F.3.3.3.3.3.1 ODU: FSK-control  KST  Configuration
KST Config:
Tx
Rx
Miscellaneous
()
Use the ◄ ►arrow keys to select Tx, Rx, or Miscellaneous, and then press ENTER.
F.3.3.3.3.3.1.1
ODU: FSK-control  KST  Configuration  Tx
Tx:Off
Freq=13955 MHz
Att=23 dB
AGC=Off ()
Use the ◄ ►arrow keys to select Tx, Freq, Att, or AGC, and then use the ▲▼ arrow keys to edit
that setting. Press ENTER when done.
F.3.3.3.3.3.1.2
ODU: FSK-control  KST  Configuration  Rx
Rx: Freq=11950 MHz
Band=B
Att=20 dB
Ref=087
()
Note that Rx Band is not shown for the KST-2000A.
Use the ◄ ►arrow keys to select Freq, Att, Ref, or Band (KST-2000B only), and then use the
▲▼ arrow keys to edit that setting. Press ENTER when done.
F.3.3.3.3.3.1.3
ODU: FSK-control  KST  Configuration 
Miscellaneous
HPA:Off
LNA:OFF
Fault-Logic=Summary
Fault-Logic=Summary
Cal:No
Use the ◄ ►arrow keys to select HPA, (HPA) Fault-Logic-Summary, LNA, (LNA) Fault-LogicSummary, or Cal, and then use the ▲▼ arrow keys to edit that setting:
Selection
Setting
HPA
(HPA power enable) Select Off or On.
F–23
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
Selection
Setting
Fault-Logic
This controls whether or not a HPA fault is indicated on the Fault status, and activates
the Summary Fault Relay. Select Summary or No-Summary.
LNA
(LNA power enable) Select Off or On.
Fault-Logic
This controls whether or not a LNA fault is indicated on the Fault status, and l activates
the Summary Fault Relay. Select Summary or No-Summary.
Cal
To calibrate, select YES and press ENTER. Calibration allows the system to determine
nominal LNB or LNB power consumption, performed at initial installation only. (Default is
NO.)
Press ENTER when done.
F.3.3.3.3.3.1.4
ODU: FSK-control  KST  Information
KST Info:
Model
Tx+Rx-Param
Misc
Numbers
()
These read-only screens provide the ODU’s current configuration information without risking
inadvertent changes.
Use the ◄ ►arrow keys to select Model, Tx+Rx-Param, Misc, or Numbers, and then press
ENTER.
Once any KST Info screen has been viewed, press ENTER or CLEAR to return to the previous
menu.
F.3.3.3.3.3.1.5
ODU: FSK-control  KST  Information  Model
MODEL:
HPA:
KST-2000B
CEFD-SSPA
This screen displays the KST and HPA model numbers.
F.3.3.3.3.3.1.6
ODU: FSK-control  KST  Information  Tx+Rx-Param
Info: Tx:Off
Rx:
13955MHz
11950MHz
10dB
20dB
Ref:087
This screen displays the Tx and Rx states, Frequencies, and Attenuation, and the reference.
F–24
CDM-625 Advanced Satellite Modem
Appendix F
F.3.3.3.3.3.1.7
Revision 15
MN-CDM625
ODU: FSK-control  KST  Information  Misc
Info:
Band:B
HPA:Off
LNA:Off
Flt-Logic:No-Summ
FLT-Logic:Summary
This screen displays the HPA and LNA operational and fault logic summary settings.
Note that the Rx Band information is not shown for the KST-2000A.
F.3.3.3.3.3.1.8
ODU: FSK-control  KST  Information  Numbers
M&C:
F/W:9364-1B
assy:9357-1A
VER:01.01.03
S/N:021476493
Use the ▲▼ arrow keys to view the Up-Converter, Down-Converter and HPA assembly and
serial numbers as well as their firmware numbers/versions.
F.3.3.3.3.3.1.9
ODU: FSK-control  KST  Alarms
Current Status:
P-Supplies:OK
Up:OK
Dn:OK
Ref:OK
HPA:OK
AGC:OK
LNA:OK
This is Summary Status information. Use the ◄ ►arrow keys to select Up, Ref, AGC, PowerSupplies, Down, HPA, or LNA, and then press ENTER. A detailed status screen, similar to the
following examples, is then shown:
Up-Converter:
Comms:OK
Over-Temp:OK
Reference:Warm
Source:IntT
72M-Lock:OK
Xref-Lock:NA
AGC Status:
Loop-Conv:OK
P-Supplies:
L-Synth:OK
Ku-Synth:OK
Range:NA
Phase:NA
Excess-Power-In:OK
Insuff-Power-In:OK
7V:OK
-7V:OK
17V:OK
12V:OK
Down-Converter: Comms:OK
Over-Temp:OK
F–25
(EC)
L-Synth:OK
Ku-Synth:OK
CDM-625 Advanced Satellite Modem
Appendix F
HPA:
Comms:OK
Over-Temp:OK
Revision 15
MN-CDM625
9.75V:OK
-5V:OK
Bias:OK
Once any KST Alarms screen has been viewed, press ENTER or CLEAR to return to the previous
menu.
F.3.3.3.3.4 ODU: FSK-control  BUC
The menus that follow assume that you have selected and the system has identified
a BUC connected via the Tx IF port.
BUC controls via FSK:
Configuration Status
Advanced-FSK ()
Use the ◄ ►arrow keys to select Configuration, Status, or Advanced-FSK, and then press ENTER.
F.3.3.3.3.4.1 ODU: FSK-control  BUC  Configuration
BUC: Tx:On (Off,On)
Addr:01 (1-15)
()
Use the ◄ ►arrow keys to select Tx: or Addr:
On the top line – For Tx: use the ▲▼ arrow keys to select Off or On.
On the bottom line – For Addr: use the ▲▼ arrow keys to select an address from 01 to 15.
Press ENTER when done.
F.3.3.3.3.4.2 ODU: FSK-control  BUC  Status
BUC: Pwr=16.2dBm=00.0W
PLL=locked
+045°C
Pclass=5 W
Sw-Ver=01
This screen provides read-only status information for the BUC setup. Press ENTER or CLEAR to
return to the previous menu.
F.3.3.3.3.4.3 ODU: FSK-control  BUC  Advanced-FSK
Advanced FSK:
CEFD BUC Type: LPOD
(LPOD,2LPODs)
()
Use the ▲▼arrow keys to select LPOD or 2LPODs, and then press ENTER.
F–26
CDM-625 Advanced Satellite Modem
Appendix F
F.3.3.3.3.4.3.1
Revision 15
MN-CDM625
ODU: FSK-control  BUC  Advanced-FSK  LPOD
(2LPODs  Online/Offline LPOD)
LPOD S/N: 123456789
Cnfg Monitor Alarms Stats Info Redun ()
This submenu and its nested menus are identical in form and function for the
following menu structures:
ODU: FSK-control  Advanced-FSK  LPOD
ODU: FSK-control  Advanced-FSK  2LPODs  Online LPOD
ODU: FSK-control  Advanced-FSK  2LPODs  Offline LPOD
Use the ◄ ►arrow keys to select Cnfg, Monitor, Alarms, Stats, Info, or Redun, and then press
ENTER.
F.3.3.3.3.4.3.1.1
ODU: FSK-control  BUC  Advanced-FSK  LPOD
(2LPODs  Online/Offline LPOD)  Cnfg
Configuration settings:
Amplifier LNB Mask Misc
()
Use the ◄ ►arrow keys to select Amplifier, LNB, Mask, or Misc, and then press ENTER.
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD)  Cnfg  Amplifier
Amplifier: Att=10.00 dB Amp=On
Mute=Disabled Att-Offset=00.00 dB ()
Use the ◄ ►arrow keys to select the setting to edit, and then use the ▲▼ arrow keys to edit
that setting:
Selection
Setting
Att
(Attenuation) 0 to 20 dB, in increments of .25dB. Limit and increments are variable
based upon unit Info string.
Amp
(Amplifier setting) Off or On
Mute
(Mute Mode) Disabled(i.e., Tx off) or Enabled (i.e., Tx on)
Att-Offset
(Attenuation Offset) 0 to 20 dB, in .25 dB increments
Press ENTER when done.
F–27
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD) Cnfg  LNB
LNB Current: Src=On
SwitchBiasTee=Thru
Window:30% Alarm=Disabled Cal=No()
Use the ◄ ►arrow keys to select the setting to edit, and then use the ▲▼ arrow keys to edit
the setting:
Selection
Setting
Src
(LNB Current Source) Disabled or Enabled.
SwitchBiasTee
Off (mute LNB) or Thru (unmute LNB).
(LNB Current-Window) Selecting a value from 20% to 50% defines the allowable
LNB Current change before declaring a fault. Selecting 99% disables the Current
Window function.
(LNB Current Window Alarm Enable ) Disable or Enable the current window
alarm.
(Calibrate-LNB-Current ) Select Yes and press ENTER to calibrate the LNB current.
(Default is No.)
Note: LNB Current Source must be Enabled before the LNB current can be
calibrated.
Window
Alarm
Cal
Press ENTER when done.
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD)  Cnfg  Mask
Mask: LFRFPwr=Masked ERLD=Masked ()
FanSpd=Masked LNBCD=Alarm LNB22V=Masked
First, use the ◄ ►arrow keys to select LFRFPower (Low Forward RF Power), ERLD (External
Reference Lock detect), FanSpd (Fan Speed), LNBCD (LNB Current Detect), or LNB22V (LNB 22V
Power Supply)
Then, for each selection, use the ▲▼ arrow keys to set that alarm to Fault, Alarm, or Masked.
Press ENTER when done.
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD)  Configuration  Misc
Misc: AFR=Enabled Ref-Adjust=087 ()
LowFwdPowerThreshold=00.00 Sync-Clock=No
Use the ◄ ►arrow keys to select the setting to edit, and then use the ▲▼ arrow keys to edit
the setting:
F–28
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
Selection
Setting
AFR
(Auto Fault Recovery) This defines how a LPOD reacts to momentary fault conditions:
• Disable – LPOD mutes when faulted and remain muted.
• Enable – LPOD mutes when faulted, then unmutes once the fault goes away.
Select an Internal 10MHz Reference setting from 000 to 255.
NOTE: The Internal Reference is set in the factory to be very accurate with the default setting
of 087. This setting is provided to compensate for the long-term frequency drift of the
oscillator.
Ref-Adjust
LowFwdPower
Threshold
This sets the threshold for the low forward power alarm/fault. An alarm/fault is triggered if the
forward power drops below the specified value. Set this setting to 00.00 to disable the
threshold.
Sync-Clock
Select YES and press ENTER to synchronize the LPOD RTC to the Modem RTC. (Default is
NO.)
Press ENTER when done.
F.3.3.3.3.4.3.1.2
ODU: FSK-control  BUC  Advanced-FSK  LPOD
(2LPODs  Online/Offline LPOD) Monitor
Monitor: Tx Temperature FET Misc
Power-Supplies1 Power-Supplies2
()
To view these read-only LPOD Monitor screens, use the ▲▼ arrow keys to select Tx, Temp,
FETs, Misc, or Power-Supplies, and then press ENTER.
Once any of these screens are viewed, press ENTER or CLEAR to return to the previous menu.
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD)  Monitor Tx
Tx: RefTune=009.6 V FwdPower = +20.4 dBm
BUCTune=011.1 V
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD)  Monitor Temperature
Temperature:
Heat Sink=048.0°C
External Air=030.0°C
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD)  Monitor  FETs
RF Power FETs Total = 20.301 Amps
F–29
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD)  Monitor Misc
Fan1Speed=100.0% Fan2Speed=100.0%
LNB Current Draw=005.5mA
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD)  Monitor Power-Supplies1
P24V1=024.1
P13VT=013.7
P24V2=024.0 LNVBT=022.1
P10V1=010.3 A10V1=010.0
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD)  Monitor  Power-Supplies2
A10V2=N/A
P7V8T=007.8 P5V8t=005.7
P2V5T=002.5 P1V2T=001.2 N5V8T=-05.6
F.3.3.3.3.4.3.1.3
ODU: FSK-control  BUC  Advanced-FSK  LPOD
(2LPODs Online/Offline LPOD)  LPOD  Alarms
Alarms:
Current-Alarms
Stored-Events
()
Use the ◄ ►arrow keys to select Current-Alarms or Stored-Alarms, and then press ENTER.
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/ Offline LPOD)  Alarms  Current-Alarms
P24V1=OK P24V2=OK LNBVT=OK P13VT=OK
P10V1=OK A10V1=OK A10V2=OK P7V8T=OK ()
Use the ▲▼ arrow keys to view additional Current Alarm status screens. Press ENTER or CLEAR
to return to the previous menu.
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD) Stored-Events
As events are compiled, the Stored-Events screen appears as shown here:
Reading Stored Events....
F–30
Please Wait
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
Once all events are compiled, the Stored-Events screen appears as shown here:
Stored Events: Clear-All: No (No,Yes)
#084 Info - PWR ON
10/12/10 12:52:08
On the top line – Use the ◄ ►arrow keys to select between log entries and the Clear-All option.
To clear the Stored -Events Log, use the ▲▼ arrow keys to select Clear-All, and then use the
▲▼ arrow keys to select Yes. Press ENTER when done.
On the bottom line – To view the Stored-Events Log: With the cursor on the entry number, use
the ▲▼ arrow keys to scroll through the entries. Up to 512 entries are stored.
Each entry provides the following information:
Item
Comments
Entry Type
• Info (Information)
• Fault
• Clear (fault cleared)
Entry Number
001 through 511
Date
European Day-Month-Year (DD-MM-YY) format
Time
Hour:Minute:Second (HH:MM:SS) format
Description of the
fault/information
Example: Info – PWR ON
F.3.3.3.3.4.3.1.4
ODU: FSK-control  BUC  Advanced-FSK  LPOD
(2LPODs Online/Offline LPOD) Statistics
Statistics:
Config
Stored-Statistics
()
Use the ▲▼ arrow keys to select Config or Stored-Statistics, and then press ENTER.
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs
Online/Offline LPOD) Statistics Config
Stats: Logging=Enabled Interval=10 min
Averaging=Disabled Clear-All=No (◄ ►)
Use the ▲▼ arrow keys to select Logging, Interval, Averaging, or Clear-All, and then use the
▲▼ arrow keys to set that setting:
F–31
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
Selection
Setting
Logging
Enabled or Disabled.
Interval
The Logging Interval is the period of time over which performance statistics are
measured. Set this interval as 00 to disable the feature (i.e., no logging) or,
otherwise, define the logging interval from 10 through 90 minutes in 10-minute
increments.
Averaging
Enabled or Disabled.
Clear-All
When prompted, select YES.
Press ENTER when done.
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs
Online/Offline LPOD)  Statistics  Stored-Statistics
To enable statistics logging, see the LPOD  Statistics: Config menu. As statistics are compiled,
the Stored-Statistics screen appears as shown here:
Reading Stored Stats..... Please Wait
Once the statistics are compiled, the Stored-Statistics screen displays this data as shown here:
Stats001: 000.0C 040.0C 20.45dBm 10.00dB
10/01/10 12:52:08 On On Off 001.0 002.3V
Use the ▲▼ arrow keys to scroll backwards or forwards through the statistics log entries.
The top line displays:
•
The statistics log entry number (up to 512 entries may be stored)
•
Operating Temperature
•
Amplifier Temperature
•
Power
•
Attenuation
The bottom line displays:
•
Entry date (in DAY-MONTH-YEAR format)
•
Entry Time (in HH:MMSS format)
F–32
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
•
On/Off state for RF Amplifier mode
•
On/Off state for Mute mode
•
Online state (Online/Offline)
•
LNB current
•
BUC Tuning Voltage
Press ENTER or CLEAR to return to the previous menu.
F.3.3.3.3.4.3.1.5
ODU: FSK-control  BUC  Advanced-FSK  LPOD
(2LPODs Online/Offline LPOD) Information
Info:
Model
Amp
LNB
Mask
Misc
()
These read-only screens provide you with the ODU’s current configuration information without
risking inadvertent changes. Use the ◄ ►arrow keys to select Model, AMP, LNB, Mask, or Misc,
and then press ENTER.
For any LPOD Information screen: Once viewed, press ENTER or CLEAR to return to the previous
menu.
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD) Information  Model
PS1032-1375145-K REF BUC
S/N: 101101068
V1.2.2
VER: 1.3.1
This screen displays the LPOD model number, the unit serial number and its operating firmware.
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD) Information  Amp
Amp Info: Att=20.00dB Amp=On
Mute=Disabled Att-Offset=00.00dB
This screen displays the RF Amplifier state, RF Mute state, Attenuation, and AUX Mute state.
F–33
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
ODU: FSK-control BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD) Information  LNB
LNB Current: Src=On
SwitchBiasTee=Off
Window:30% Alarm=Disabled
This screen displays the LNB Current information.
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD) Information  Mask
Mask: LFRFPwr=Masked ERLD=Masked
FanSpd=Alarm LNBCD=Alarm LNB22V=Alarm
This screen displays the LPOD mask settings.
ODU: FSK-control  BUC  Advanced-FSK  LPOD (2LPODs 
Online/Offline LPOD)  Information  Misc
Misc: AFR=Enabled Ref-Adjust=087
LowFwdPowerThreshold=00.00
This screen displays the Auto Fault Recovery state, the Internal 10MHz Reference setting, and
the Low Forward Power Threshold setting.
F.3.3.3.3.4.3.1.6
ODU: FSK-control  BUC  Advanced-FSK  LPOD
(2LPODs Online/Offline LPOD)  Redun
Redundancy-Switch-Mode=1:1 Red TX+RX
Force-Online=N Online-State=Offline()
Use the ◄ ►arrow keys to select the setting to edit, and then use the ▲▼ arrow keys to edit
that setting:
Selection
Setting
Redundancy-Switch-Mode
Off, 1:1 Red Tx, 1:1 Red TX+RX, Manual.
Force-Online
Select Yes to force Offline unit to generate a redundant switchover.
Otherwise, select No.
Online-State
Read-only. Displays status as Online or Offline.
Press ENTER when done.
F–34
CDM-625 Advanced Satellite Modem
Appendix F
F.3.3.3.3.4.3.1.7
Revision 15
MN-CDM625
ODU: FSK-control  BUC  Advanced-FSK  2LPODs
The menus that follow assume that you have selected and the system has
identified two LPODs connected via the Tx IF port.
1:1 Monitor & Control
Online LPOD
Offline LPOD
()
Use the ◄ ►arrow keys to select Online LPOD or Offline LPOD, and then press ENTER.
ODU: FSK-control  BUC  Advanced-FSK  2LPODs  Online
LPOD
ODU: FSK-control  BUC  Advanced-FSK  2LPODs  Offline
LPOD
LPOD S/N: 123456789
Cnfg Monitor Alarms Stats Info Redun ()
Use the ◄ ►arrow keys to select Cnfg, Monitor, Alarms, Stats, Info, or Redun, and then press
ENTER.
Sect. F.3.3.3.3.4.3.1 ODU: FSK-control BUC  Advanced-FSK  LPOD for
complete information for these nested menu choices.
F–35
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.4 ODU Operations via the CDM-625 Web Server (HTTP) Interface
The CDM-625 Advanced Satellite Modem’s embedded HTTP Interface provides an
easy to use application to configure and monitor all aspects of an ODU. See
Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT for complete
instructions on using this interface.
The Comtech EF Data LPOD Amplifier / Block Up Converter is not supported by the
CDM-625 Web Server (HTTP) Interface at this time.
A user-supplied web browser allows the full monitor and control (M&C) of an installed Comtech
EF Data CSAT-5060 or KST-2000A/B Transceiver (ODU), installed in standalone or 1:1
Redundancy configurations, from the CDM-625’s Web Server Interface. This embedded web
application is designed for, and works best with, Microsoft’s Internet Explorer Version 7.0 or
higher.
F.4.1
Web Server Interface and Menu Tree
Type the CDM-625’s IP Address into the Address area of the user-supplied web browser, and
then enter a valid User Name and Password is accepted. You will see the CDM-625 Web Server
Interface “splash” page (Figure F-3). Note that the Base Modem and Packet Processor Firmware
Versions shown in this example are subject to change.
Figure F-3. CDM-625 Web Server (HTTP) Interface Home Page
The Figure F-4 menu tree illustrates the ODU options available through the CDM-625 Web Server
(HTTP) Interface. The CDM-625 Web Server Interface provides access to six (6) navigation tabs
F–36
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
(shown in blue). Beyond this top-level row of navigation tabs, the diagram illustrates the available
primary (green) and nested (yellow) page tabs that afford you more specific functionality.
Tabs not specific to ODU operation appear dimmed and are explicitly defined in Chapter 6.
ETHERNET-BASED REMOTE PRODUCT MANAGEMENT. Click a navigation tab to continue.
Pages marked with double asterisks (**) are operable only when BUCs or LNBs
are installed.
Figure F-4. CDM-625 Web Server (HTTP) Interface Menu Tree (FW Ver. 2.3.1)
F–37
CDM-625 Advanced Satellite Modem
Appendix F
F.4.2
Revision 15
MN-CDM625
Web Page Descriptions
F.4.2.1
Configuration | BUC (Block Up Converter) Page
When a Block Up Converter (BUC) is available, use this page to configure its operating settings
and to view the BUC status for L-Band operation.
Figure F-5. Configuration | BUC page
BUC Configuration
•
BUC Power Enable, 10 MHz Ref Enable, and Output Power Enable – Use the drop-down
lists to turn these functions ON or OFF.
•
BUC Low and High Current Limit – Assign a value (in mA) ranging from 0 to 4000.
•
Tx LO (Low Oscillator) Frequency – Assign a value (in MHz) to the Tx LO Frequency, and then
use the drop-down list to designate the value as a HIGH (+) or LOW (-) limit.
•
BUC Address – Assign a value for the BUC Address from 1 to 15.
Click [Submit BUC Controls] to save the setting changes made in this section.
BUC Status
This section refreshes automatically every ten seconds. These status settings are read-only and
cannot be changed.
F–38
CDM-625 Advanced Satellite Modem
Appendix F
F.4.2.2
Revision 15
MN-CDM625
Configuration | LNB (Low Noise Block Down Converter)
When a Low Noise Block Down Converter (LNB) is available, use this page to configure its
operating settings and to view the LNB status for L-Band operation.
Figure F-6. Configuration | LNB page
LNB Control
•
LNB DC Power and LNB Reference Enable – Use the drop-down lists to turn either function
ON or OFF.
•
LNB Low and High Current Threshold – Assign a value (in mA) ranging from 0 to 500 for
either function.
•
Rx LO (Low Oscillator) Frequency – Assign a value (in MHz) to the Rx LO Frequency, and
then use the drop-down list to designate the value as a HIGH (+) or LOW (-) limit.
Click [Submit LNB Controls] to save these settings.
LNB Status (Refreshes every 5 seconds)
This section refreshes automatically every five seconds. These status settings are read-only and
cannot be changed.
F–39
CDM-625 Advanced Satellite Modem
Appendix F
F.4.2.3
Revision 15
MN-CDM625
Status | Modem Logs | Base Modem Page
Use this page to control how the CDM-625 processes ODU fault and alarm masking settings.
Figure F-7. Status | Modem Logs | Base Modem page
Events Log
•
Unread Events – Displays the total number of unread stored events in the scrollable events
window. As you display stored event groups, this number decrements accordingly.
•
Read Next Five Events – Click to buffer the next group of five stored events into the
scrollable events window.
•
Clear Events Log – Click to wipe clean the stored events log.
•
Initialize Events Pointer – Click to reset the log’s internal pointer.
Click [Submit] to save these settings.
F–40
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
Statistics Log
•
Read Next Five Statistics – Click to buffer the next group of five stored events into the
scrollable statistics window.
•
Clear Statistics Log – Click to wipe clean the stored statistics log.
•
Initialize Statistics Pointer – Click to reset the log’s internal pointer.
•
Unread Statistics – Displays the total number of unread stored statistics in the scrollable
statistics window. As stored statistics are displayed, this number decrements accordingly.
Click [Submit] to save these settings.
Alarm Mask
Use the available option buttons to define a designated BUC or LNB alarm as Masked or Active,
and then click [Submit Alarm Mask] to save these changes.
F–41
CDM-625 Advanced Satellite Modem
Appendix F
F.4.2.4
Revision 15
MN-CDM625
ODU Pages
All ODU pages are viewable with all three levels of user login. However, you may
submit changes to the ‘ODU | Config’ and ‘ODU | Utilities’ pages only if you have
Administrative or Read/Write privileges.
When configuring the CDM-625 for 70/140 MHz operation, use the ‘ODU (Outdoor Unit)’ pages
to control and monitor the CSAT-5060 or KST-2000A/B Outdoor Unit that is connected via FSK
to the CDM-625.
ODU Comms must be Enabled, and the CDM-625 must be configured for 70/140
MHz operation, in order to fully access the ‘ODU | Config’, ‘ODU | Status’, and
‘ODU | Utilities’ pages.
If the CDM-625 is otherwise configured for L-Band operation and selection of the
‘ODU | Config’, ‘ODU | Status’, and ‘ODU | Utilities’ pages is attempted, the
following error message displays:
When you configure the CDM-625 for L-Band operation, use the ‘ODU | Enable’ page to enable
FSK operation for BUC products.
Click the Enable, Config, Status, or Utilities tab to continue.
F–42
CDM-625 Advanced Satellite Modem
Appendix F
F.4.2.4.1
Revision 15
MN-CDM625
ODU | Enable
Use this page to enable or disable communications with CSAT-5060 or KST-2000A/B ODUs for
70/140 MHz operation, or LPOD BUCs for L-Band operation (see Sect. F.4.2.1 Configuration |
BUC (Block Up Converter)).
Figure F-8. ODU | Enable page
ODU Comms
Use the drop-down list to select ODU operation as Disabled or Enabled, and then click [Submit].
If you encounter a communications issue – e.g., an ODU is either physically not present or the
ODU Comms cable is not connected to the CDM-625 – the following error page displays after
clicking [Submit]:
Take steps to troubleshoot the ODU setup before attempting to enable ODU operations from
this page. See the pertinent ODU Installation and Operation Manual for further information.
F–43
CDM-625 Advanced Satellite Modem
Appendix F
F.4.2.4.2
Revision 15
MN-CDM625
ODU | Config Pages
When you configure either the Comtech EF Data CSAT-5060 or KST-2000A/B as the ODU, you
may use this page to configure operating settings specific to the active unit. Otherwise, when
you attempt to access this page without first enabling ODU communications per the previous
section, the following error page displays:
F.4.2.4.2.1 ODU | Config (CSAT-5060)
Figure F-9 shows the ‘ODU | Config’ page as it appears with you configure the Comtech EF Data
CSAT-5060 as the ODU. Use this page to configure the primary ODU’s Transmit and Receive
Parameters.
Figure F-9. ODU | Config page (CSAT-5060)
F–44
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
ODU Selection
If you use ODUs in redundancy, you may toggle this page between the Online and Offline units.
Use the drop-down list to select CSAT #1 or CSAT #2, and then click [Select ODU]. A message in
the right hand column of this section identifies which unit is ‘ONLINE’.
Up Converter Parameters
•
Frequency – Enter a value in MHz.
•
Attenuation – Enter a value in dB.
•
Slope Mode – From the drop-down list, select Manual or Calibrated.
•
Slope Adjust (Manual Mode Only) – Select the desired setting from the drop-down list.
•
Mute – From the drop-down list, select Disable or Enable.
•
Gain Offset (1:1 Redundancy Only) – Select the desired setting from the drop-down list.
•
Amplifier – From the drop-down list, select On or Off.
Down Converter Parameters
•
Frequency – Enter a value in MHz.
•
Attenuation – Enter a value in dB.
•
Slope Mode – From the drop-down list, select Manual or Calibrated.
•
Slope Adjust (Manual Mode Only) – Select the desired setting from the drop-down list.
•
Mute – From the drop-down list, select Disable or Enable.
•
Gain Offset (1:1 Redundancy Only) – Select the desired setting from the drop-down list.
Unit Parameters
•
Mute Mode – From the drop-down list, select Muted after freq change or Unmuted after
freq change.
•
Auto Fault Recovery, Cold Start, and Ext Reference Fault Logic – From the drop-down lists,
select Disable or Enable.
•
Reference Oscillator Adjust – Enter a value from 0-255.
F–45
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
LNA Parameters
•
Current Alarm Window – Enter a value of 20-50, or 99 to disable this feature.
•
Current Source – From the drop-down list, select Disable or Enable.
•
Fault Logic – From the drop-down list, select Summary or No Summary.
ODU Circuit Identification
Enter an ODU Circuit Identification name of up to 24 alphanumeric characters.
Click [Submit] to save these settings.
F–46
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.4.2.4.2.2 ODU | Config (KST-2000A/B)
Figure F-10 shows the ‘ODU | Config’ page as it appears when you configure the Comtech EF
Data KST-2000A/B as the ODU. Use this page to configure the primary ODU’s Transmit and
Receive Parameters.
Figure F-10. ODU | Config page (KST-2000A/B)
Up Converter
•
Frequency – Enter a value in MHz.
•
Attenuation – Enter a value in dB.
•
Output – From the drop-down list, select On or Off.
Down Converter
•
Frequency – Enter a value in MHz.
•
Attenuation – Enter a value in dB.
•
Rx Band (For KST-2000B Only) – From the drop-down list, select band A (10950 to 11700
MHz), band B (11700 to 12200 MHz), or band C (12250 to 12750 MHz).
HPA
•
HPA Power Enable – From the drop-down list, select On or Off.
•
HPA Fault Logic – From the drop-down list, select Summary or No Summary.
F–47
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
LNA
•
LNA Power Enable – From the drop-down list, select On or Off.
•
LNA Fault Logic – From the drop-down list, select Summary or No Summary.
Unit
•
AGC (Automatic Gain Control) – From the drop-down list, select On or Off.
•
Reference Oscillator Adjust – Enter a value from 0-255.
•
Circuit ID – Enter a Circuit Identification name of up to 24 alphanumeric characters.
•
Lock Mode – From the drop-down list, select On or Off.
Click [Submit] to save these settings.
F–48
CDM-625 Advanced Satellite Modem
Appendix F
F.4.2.4.3
Revision 15
MN-CDM625
ODU | Status
The appearance of the ‘ODU | Status’ page adjusts to the type of ODU that is
configured for operation with the CDM-625.
Use this page to review read-only status windows pertaining to the current operating condition
for either the Comtech EF Data CSAT-5060 or the KST-2000A/B ODU.
F.4.2.4.3.1 ODU | Status (CSAT-5060)
Figure F-11 shows the ‘ODU | Status’ page as it appears when you configure the Comtech EF
Data CSAT-5060 as the ODU. Use this page to review read-only status reports pertaining to the
ODU’s Maintenance Parameters; Alarms; and the number of Unread Events in the Events Log.
Figure F-11. ODU | Status page (CSAT-5060)
ODU Selection
If you use ODUs in redundancy, you may toggle this page between the Online and Offline units.
Use the drop-down list to select CSAT #1 or CSAT #2, and then click [Select ODU]. A message
identifies the currently active unit as ‘ONLINE’ in the right-hand column of this section.
F–49
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.4.2.4.3.2 ODU | Status (KST-2000A/B)
Figure F-12 shows the read-only ‘ODU | Status’ page as it appears when you configure the
Comtech EF Data KST-2000A/B as the ODU.
Figure F-12. ODU | Status page (KST-2000A/B)
ODU Type / HPA Type
The section identifies the installed equipment types.
The remainder of this page provides configuration and operational status information (e.g., OK /
FT = Fault) for the following settings:
•
Summary Fault Status
•
LNA (Low-Noise Amplifier
•
Common Equipment
•
AGC (Automatic Gain Control)
•
Up Converter
•
Down Converter
•
Reference
•
HPA (High Power Amplifier)
F–50
CDM-625 Advanced Satellite Modem
Appendix F
F.4.2.4.4
Revision 15
MN-CDM625
ODU | Utilities
The appearance of the ‘ODU | Utilities’ page adjusts to the type of ODU that is
configured for operation with the CDM-625.
Use this page to configure various ODU utility functions for either the Comtech EF Data
CSAT-5060 or the KST-2000A/B ODU.
F.4.2.4.4.1 ODU | Utilities (CSAT-5060)
Figure F-13 shows the ‘ODU | Utilities’ page as it appears when you configure the Comtech EF
Data CSAT-5060 as the ODU.
Figure F-13. ODU | Utilities page (CSAT-5060)
ODU Selection
If you use ODUs in redundancy, you may toggle this page between the Online and Offline units.
Use the drop-down list to select CSAT #1 or CSAT #2, and then click [Select ODU]. A message
identifies the currently active unit as ‘ONLINE’ in the right-hand column of this section.
Force 1:1 Switch
If you use ODUs in redundancy, and the selected unit is currently the Online unit, click [Force 1:1
Switch] to force a switchover so the unit will then be in Offline (standby) mode. The command is
only valid for the Online unit in a 1:1 pair.
F–51
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
Recalibrate LNA Current
Click to recalibrate the LNA Current.
Redundancy Box Mode
Select Automatic or Manual, and then click [Submit].
ODU Date & Time
•
Enter a date in the form DD/MM/YY (where DD = day [01 to 31], MM = month [01 to 12],
and YY = year [00 to 99]).
•
Enter a time using HH:MM:SS format (where HH = hour [00 to 23], MM = minutes [00 to 59],
and SS = seconds [00 to 59]).
Click [Enter Date/Time] once you enter the desired date and time in this section.
ODU Stored Events
This section includes a scrollable window, which provides a visual record of the ODU stored
events.
•
Unread Events – Displays the total number of unread stored events in the scrollable events
window. As stored event groups are displayed, this number decrements accordingly.
•
Read Next Five Events – Click to buffer the next group of five stored events into the
scrollable events window.
•
Clear Stored Events – Click to wipe clean the stored events log.
•
Initialize Events Pointer – Click to reset the log’s internal pointer.
Click [Submit] to save these settings.
F–52
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.4.2.4.4.2 ODU | Utilities (KST-2000A/B)
Figure F-14 shows the read-only ‘ODU | Utilities’ page as it appears when you configure the
Comtech EF Data KST-2000A/B as the ODU.
Figure F-14. ODU | Utilities page (KST-2000A/B)
ODU Type / HPA Type
This section identifies the installed equipment types.
The remainder of this page identifies the configured ODU chassis’ installed component assembly
numbers and serial numbers, and firmware numbers and versions.
F–53
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.5 ODU Operations via the CDM-625 Telnet Command Line Interface (CLI)
Appendix E. TELNET COMMAND LINE INTERFACE (CLI) OPERATION
The Telnet Command Line Interface (referred to hereafter as the Telnet CLI or the CLI) (Figure
F-15) is an Ethernet-based user menu system for the CDM-625 Advanced Satellite Modem
equipped with an installed and enabled optional IP Packet Processor card. The CLI facilitates
configuration, monitoring, and control of a CSAT-5060 Transceiver (ODU), installed in standalone
or 1:1 Redundancy configurations, using a user-supplied terminal emulator.
1. The CDM-625 Telnet Command Line Interface (CLI) is accessible only when the
optional IP Packet Processor is installed and enabled.
2. The CDM-625 Telnet CLI uses Telnet TCP Port 107. Be sure to specify this port
when configuring your terminal emulator for CLI operation.
3. For best results Comtech EF Data recommends PuTTY or Tera Term as the
preferred terminal emulators.
4. The Telnet CLI’s Remote Access Mode must be set to [Ethernet] in order to
use the Telnet CLI for ODU operations.
Figure F-15. CDM-625 Telnet Command Line Interface (CLI)
(Left) Tera Term CLI Example
(Right) PuTTY CLI Example
F–54
CDM-625 Advanced Satellite Modem
Appendix F
F.5.1
Revision 15
MN-CDM625
ODU Operations using the Telnet CLI
1. ODU Comms must be Enabled, and the CDM-625 must be configured for
70/140 MHz operation in order to fully use the Telnet CLI ODU menus.
2. The Comtech EF Data KST-2000A/B Transceiver and LPOD Amplifier / Block Up
Converter are not supported by the Telnet CLI at this time.
F.5.1.1
Home (Main) Menu
The Home Menu serves as the CLI’s primary navigation page. Press the ‘E’ hot key to access the
ODU submenus.
Hot Key Description
Function
A
Administration
Access administrative configuration submenu
B
Modem
Access modem configuration submenu
C
Network
Access network configuration submenu
D
WAN
Access WAN configuration submenu
E
Outdoor Unit (ODU)
Access ODU comms, CSAT-5060 configuration submenus
F
Redundancy
G
General Information
H
Logs
I
Statistics
Access 1:1 or 1:N redundancy configuration submenu
Enter alphanumeric Circuit ID; view read-only CDM-625 operations information
screens
Access Base Modem and Packet Processor stored events and statistics logs,
alarms control submenus
Access CDM-625 operational statistics submenus
J
Contact
View read-only Product Support contact information screen
K
Remote Mode
Open the Remote Access Mode setting
F–55
CDM-625 Advanced Satellite Modem
Appendix F
F.5.1.2
Revision 15
MN-CDM625
Home > Outdoor Unit (ODU) Submenu
After configuring the CDM-625 for 70/140 MHz operation, you may use the ‘ODU (Outdoor
Unit)’ pages to control and monitor the CSAT-5060 Outdoor Unit that is connected via FSK to the
CDM-625.
Open the Outdoor Unit (ODU) submenu from the Home menu. This submenu contains the
following options:
Hot
Key
Dialog Window
Option Entry
A
ODU Comms Enabled
Use the ↑↓ arrow keys to select Disabled or Enabled
B
CSAT-5060
Open the CSAT-5060 submenu – See Sect. F.5.1.2.1
Press a hot key to open the dialog window or the submenu. Otherwise, press [ESC] to return to
the Home submenu.
F–56
CDM-625 Advanced Satellite Modem
Appendix F
F.5.1.2.1
Revision 15
MN-CDM625
Home > Outdoor Unit (ODU) > CSAT-5060 Submenu
Open the nested CSAT-5060 submenu from the Outdoor Unit (ODU) submenu. This submenu
contains the following options:
Hot
Key
Dialog Window
Option Entry
Sect.
A
Select
Use the ↑↓ arrow keys to select Csat1 or Csat2
N/A
B
Up Converter Settings (1/2)
C
Up Converter Settings (2/2)
Configure an Up Converter
F.5.1.2.1.1
D
Down Converter Settings (1/2)
E
Down Converter Settings (2/2)
Configure a Down Converter
F.5.1.2.1.2
F
Unit Settings (1/2)
G
Unit Settings (2/2)
Configure an ODU
F.5.1.2.1.3
H
LNA Settings
Configure a Low Noise Amplifier
F.5.1.2.1.4
I
Status
Review ODU Status Information
F.5.1.2.1.5
J
Logs
Review and manage Event Logs
F.5.1.2.1.6
K
Redundancy
Configure ODUs for 1:N Redundancy
F.5.1.2.1.7
L
Utilities
Set device time and date, review the unit’s firmware
version and serial number
F.5.1.2.1.8
Press a hot key to open a dialog window or configuration page. See the specified appendix
section for further configuration options. Otherwise, press [ESC] to return to the ODU submenu.
F–57
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.5.1.2.1.1 Home > Outdoor Unit (ODU) > CSAT-5060 > Up Converter
Settings 1/2, 2/2
After configuring the CDM-625 for L-Band operation, and when a Block Up
Converter (BUC) is installed, you may use this page to configure BUC operating
settings and to view the BUC operational status.
Open the Up Converter Settings 1/2 page or the Up Converter Settings2/2 page from the nested
CSAT-5060 submenu.
The Up Converter Settings 1/2 page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
Tx Frequency
Enter a value from 5845.000 to 6725.000 MHz
B
Tx Attenuation
Enter a value from 0.00 to 25.00 dB
C
Tx Slope Mode
Use the ↑↓ arrow keys to select Manual or Calibrated
D
Tx Slope Value
Enter a value from 0.0 to 1.0 units
The Up Converter Settings 2/2 page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
Tx Mute
Use the ↑↓ arrow keys to select Disabled or Enabled
B
Tx Amplifier
Use the ↑↓ arrow keys to select Off or On
C
Tx Gain Offset
Enter a value from -4.00 to 0.00 dBm
Typical for either page, press a hot key to open a dialog window. Otherwise, press [ESC] to
return to the nested CSAT-5060 submenu.
F–58
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.5.1.2.1.2 Home > Outdoor Unit (ODU) > CSAT-5060 > Down Converter
Settings 1/2, 2/2
After configuring the CDM-625 for L-Band operation, and when a Low Noise Block
Down Converter (LNB) is installed, you may use this page to configure LNB
operating settings and to view the LNB operational status.
Open the Down Converter Settings 1/2 page or the Down Converter Settings 2/2 page from the
nested CSAT-5060 submenu.
The Down Converter Settings 1/2 page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
Rx Frequency
Enter a value from 3400.000 to 4200.000 MHz
B
Rx Attenuation
Enter a value from 0.00 to 20.00 dB
C
Rx Slope Mode
Use the ↑↓ arrow keys to select Manual or Calibrated
D
Rx Slope Value
Enter a value from 0.0 to 1.0 units
The Down Converter Settings 2/2 page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
Rx Mute
Use the ↑↓ arrow keys to select Disabled or Enabled
B
Rx Gain Offset
Enter a value from -4.00 to 0.00 dBm
Typical for either page, press a hot key to open a dialog window. Otherwise, press [ESC] to
return to the nested CSAT-5060 submenu.
F–59
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.5.1.2.1.3 Home > Outdoor Unit (ODU) > CSAT-5060 > Unit Settings 1/2, 2/2
Open the Unit Settings 1/2 page or the Unit Settings 2/2 page from the nested CSAT-5060
submenu.
The Unit Settings 1/2 page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
Unit Mute Mode
Use the ↑↓ arrow keys to select Unmuted After Freq Change or
Muted After Freq Change
B
Unit Auto Fault Recovery
Use the ↑↓ arrow keys to select Disabled or Enabled
C
Unit Cold Start
Use the ↑↓ arrow keys to select Disabled or Enabled
The Unit Settings 2/2 page contains the following options:
Hot
Key
Dialog Window
Option Entry
A
Unit Ext Ref Fault Logic
Use the ↑↓ arrow keys to select No Summary or Summary
B
Unit Ref Osc Adjust
Enter a value from 0 to 255
C
Circuit ID
Enter an identifying label for the ODU here
Typical for either page, press a hot key to open a dialog window. Otherwise, press [ESC] to
return to the nested CSAT-5060 submenu.
F–60
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.5.1.2.1.4 Home > Outdoor Unit (ODU) > CSAT-5060 > LNA Settings
Open the LNA Settings page from the nested CSAT-5060 submenu. This page contains the
following options:
Hot
Key
Dialog Window
Option Entry
A
Unit LNA Current Window
Enter a value as follows:
• Range 1 – 20 to 50
• Range 2 – 99 to 99
B
Unit LNA Current Window
Use the ↑↓ arrow keys to select Disabled, Enabled, or Enabled
When Online
C
Unit LNA Fault Logic
Use the ↑↓ arrow keys to select No Summary or Summary
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the nested CSAT5060 submenu.
F–61
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.5.1.2.1.5 Home > Outdoor Unit (ODU) > CSAT-5060 > Status
Open the read-only Status page from the nested CSAT-5060 submenu. This page provides the
following information:
Item
Description
Online State
Identifies the unit as Online or Offline
Maintenance Parameters
Info needed
Unit Faults
Lists the curren t number of unit faults
Number Unread Events
Lists the number of unread events that are currently stored in the Events
Log
Press [ESC] to return to the nested CSAT-5060 submenu.
F–62
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.5.1.2.1.6 Home > Outdoor Unit (ODU) > CSAT-5060 > Logs
Open the Logs page from the nested CSAT-5060 submenu. This page contains the following
options:
Hot
Key
Dialog Window
Option Entry
A
Reset Event Pointer
B
Clear Event Log
Typical for either entry – Use the ↑↓ arrow keys to select No or
Yes
Press a hot key to open a dialog window.
Stored Events: The page additionally provides a listing of the latest five stored events. Each
event consists of a description, its time in HHMMSS format, and the date in DDMMYY format.
Press [F5] to update this page with the next five events. Accessing event items in this manner
causes the Number Unread Events count on the CSAT-5060 > Status page to decrement
accordingly.
Press [ESC] to return to the nested CSAT-5060 submenu.
F–63
CDM-625 Advanced Satellite Modem
Appendix F
Revision 15
MN-CDM625
F.5.1.2.1.7 Home > Outdoor Unit (ODU) > CSAT-5060 > Redundancy
Open the Redundancy page from the nested CSAT-5060 submenu. Redundant ODU
configuration options are as follows:
Hot
Key
Dialog Window
Option Entry
A
Unit Red Force Switch
Use the ↑↓ arrow keys to select No or Yes
B
Unit Redundancy Mode
Use the ↑↓ arrow keys to select Manual or Auto
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the nested CSAT5060 submenu.
F.5.1.2.1.8 Home > Outdoor Unit (ODU) > CSAT-5060 > Utilities
Open the Utilities page from the nested CSAT-5060 submenu. This page contains the following
options:
Hot
Key
Dialog Window
Option Entry
A
Device Time
Enter a time in the form HH:MM:SS
B
Device Date
Enter a date in the form DD/MM/YY
The page additionally provides the model number, software version, and unit serial number of
the recognized ODU.
Press a hot key to open a dialog window. Otherwise, press [ESC] to return to the nested CSAT5060 submenu.
F–64
2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA
480 • 333 • 2200 PHONE
480 • 333 • 2161 FAX
">