Comtech EF Data CDM-840 Product specifications

CDM-840
Advanced VSAT Series Remote Router
Installation and Operation Manual
For Firmware Version 1.5.1.X 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-CDM840 Revision 2
Errata A for MN-CDM840 Rev 2
Comtech EF Data Documentation Update
Subject:
Errata Part Number:
PLM CO Number:
Comments:
ER-CDM840-EA2
Update Section B.2.2, Deleted Occupied Bandwidth data
ER-CDM840-EA2 (Errata documents are not revised)
C-0029457
See attached page(s). The new information will be included in the next released
revision of the manual.
Rev -
PLM C-0029457
ER-CDM840-EA2
Rev -
PLM C-0029457
CDM-840
Advanced VSAT Series Remote Router
Installation and Operation Manual
For Firmware Version 1.5.1.X or Higher
Part Number MN-CDM840
Revision 2
Copyright © 2013 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
This page is intentionally blank.
TABLE OF CONTENTS
TABLE OF CONTENTS ............................................................................................................III
TABLES .................................................................................................................................... X
FIGURES ................................................................................................................................... X
PREFACE ............................................................................................................................... XIII
About this Manual .......................................................................................................................... xiii
Related Documents.................................................................................................................................xiii
Conventions and References ........................................................................................................... xiii
Patents and Trademarks .........................................................................................................................xiii
Warnings, Cautions, and Notes...............................................................................................................xiii
Examples of Multi-Hazard Notices ..........................................................................................................xiv
Recommended Standard Designations...................................................................................................xiv
Safety and Compliance .................................................................................................................... xiv
Electrical Safety and Compliance ............................................................................................................xiv
Electrical Installation ...............................................................................................................................xiv
Operating Environment .......................................................................................................................... xv
European Union Radio Equipment and Telecommunications Terminal Equipment (R&TTE)
Directive (1999/5/EC) and EN 301 489-1 ............................................................................................. xv
European Union Electromagnetic Compatibility (EMC) Directive (2004/108/EC) ........................ xv
European Union Low Voltage Directive (LVD) (2006/95/EC) ..............................................................xvi
European Union RoHS Directive (2002/95/EC) ...................................................................................xvi
European Union Telecommunications Terminal Equipment Directive (91/263/EEC) ........................xvi
CE Mark .............................................................................................................................................. xvii
Product Support............................................................................................................................. xvii
Comtech EF Data Headquarters ...................................................................................................... xvii
Warranty Policy ............................................................................................................................ xviii
Limitations of Warranty ........................................................................................................................ xviii
Exclusive Remedies ................................................................................................................................. xix
CHAPTER 1.
INTRODUCTION ............................................................................................1–1
1.1
Overview ............................................................................................................................ 1–1
1.2
CDM-840 Functional Description ......................................................................................... 1–2
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1.3
CDM-840 Features .............................................................................................................. 1–4
1.3.1 Physical Description .................................................................................................................. 1–4
1.3.2 Dimensional Envelope .............................................................................................................. 1–4
1.3.3 CDM-840 Physical Features ...................................................................................................... 1–5
1.3.3.1 Front Panel ........................................................................................................................ 1–5
1.3.3.2 Rear Panel ......................................................................................................................... 1–6
1.3.3.2.1 Rear Panel Standard Features..................................................................................... 1–6
1.3.3.2.2 Rear Panel Optional Features ..................................................................................... 1–7
1.4
CDM-840 Specifications....................................................................................................... 1–8
1.4.1 Product Feature Specifications ................................................................................................. 1–8
1.4.2 Bit Error Rate (BER) ................................................................................................................... 1–9
1.4.3 Standard Assemblies............................................................................................................... 1–10
1.4.4 Optional Assemblies ............................................................................................................... 1–10
1.4.5 Regulatory Compliance........................................................................................................... 1–10
CHAPTER 2.
2.1
INSTALLATION .............................................................................................2–1
Unpacking and Inspecting the Shipment .............................................................................. 2–1
2.2
Installing Into a Rack Enclosure ........................................................................................... 2–2
2.2.1 Installing the Optional Rear-Mounting Support Brackets Kit ................................................... 2–4
CHAPTER 3.
REAR PANEL CONNECTIONS .....................................................................3–1
3.1
Cabling Connection Types ................................................................................................... 3–1
3.1.1 Coaxial Cable Connections........................................................................................................ 3–1
3.1.1.1 Type ‘BNC’ ......................................................................................................................... 3–2
3.1.1.2 Type ‘TNC’ ......................................................................................................................... 3–2
3.1.1.3 Type ‘N’ ............................................................................................................................. 3–2
3.1.1.4 Type ‘F’ .............................................................................................................................. 3–3
3.1.1.5 Type ‘SMA’ (Subminiature Version ‘A’) ............................................................................. 3–3
3.1.2 D-Subminiature Cable Connections .......................................................................................... 3–3
3.1.3 Circular Cable Connections ....................................................................................................... 3–4
3.1.4 RJ-45, RJ-48 Cable Connections ................................................................................................ 3–4
3.2
CDM-840 Cabling Connections ............................................................................................. 3–5
3.2.1 IF Connector Group .................................................................................................................. 3–6
3.2.1.1 ‘L-BAND Rx’ IF Connector .................................................................................................. 3–6
3.2.1.2 ‘L-BAND Tx’ IF Connector .................................................................................................. 3–6
3.2.2 Terrestrial Data Connector Group ............................................................................................ 3–6
3.2.2.1 ‘G.703 | OUT’ / ‘G.703 | IN’ Connectors........................................................................... 3–6
3.2.2.2 ‘TRAFFIC | GE’ (Gigabit Ethernet) Connector ................................................................... 3–6
3.2.3 Utility Connector Group ........................................................................................................... 3–7
3.2.3.1 ‘MANAGEMENT | FE’ (Fast Ethernet) Connector ............................................................. 3–7
3.2.3.2 ‘REDUNDANCY’ Connector................................................................................................ 3–7
3.2.3.3 ‘CONSOLE’ Interface Connector ........................................................................................ 3–8
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3.2.3.4
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‘ALARMS’ Interface Connector.......................................................................................... 3–9
3.3
CDM-840 Ground and Power Connections ......................................................................... 3–10
3.3.1 Chassis Ground Interface ........................................................................................................ 3–10
3.3.2 115V/230V Alternating Current (AC) Power Interface (Standard) ......................................... 3–11
3.3.2.1 AC Operation – Applying Power...................................................................................... 3–11
3.3.2.2 AC Operation – Replacing Fuses .................................................................................... 3–12
3.3.3 48V Direct Current (DC) Power Interface (Optional) .............................................................. 3–13
3.3.3.1 DC Operation – Applying Power ..................................................................................... 3–13
3.3.3.2 DC Operation – Replacing Fuses ..................................................................................... 3–14
CHAPTER 4.
UPDATING FIRMWARE ................................................................................4–1
4.1
Updating Firmware via the Internet..................................................................................... 4–1
4.2
Getting Started: Preparing for the Firmware Download ....................................................... 4–2
4.3
Downloading and Extracting the Firmware Update .............................................................. 4–6
4.4
Performing the Ethernet FTP Upload Procedure ................................................................... 4–8
CHAPTER 5.
5.1
FAST ACTIVATION PROCEDURE................................................................5–1
Introduction ....................................................................................................................... 5–1
5.2
FAST Activation via the Web Server Interface ...................................................................... 5–2
5.2.1 FAST Configuration ................................................................................................................... 5–3
5.2.2 FAST Upgrade ........................................................................................................................... 5–4
CHAPTER 6.
6.1
ETHERNET-BASED REMOTE PRODUCT MANAGEMENT .........................6–1
Introduction ....................................................................................................................... 6–1
6.2
Ethernet Management Interface Protocols .......................................................................... 6–2
6.2.1 Ethernet Management Interface Access .................................................................................. 6–2
6.3
SNMP Interface................................................................................................................... 6–3
6.3.1 Management Information Base (MIB) Files.............................................................................. 6–3
6.3.2 SNMP Community Strings......................................................................................................... 6–3
6.4
Web Server (HTTP) Interface ............................................................................................... 6–4
6.4.1 User Login ................................................................................................................................. 6–4
6.4.2 Web Server Interface – Operational Features .......................................................................... 6–5
6.4.2.1 Virtual Front Panel ............................................................................................................ 6–5
6.4.2.2 Navigation ......................................................................................................................... 6–7
6.4.2.3 Page Sections .................................................................................................................... 6–7
6.4.2.4 Action Buttons .................................................................................................................. 6–7
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6.4.2.5 Drop-down Lists ................................................................................................................ 6–8
6.4.2.6 Text or Data Entry ............................................................................................................. 6–8
6.4.3 Web Server Interface – Menu Tree .......................................................................................... 6–9
6.4.4 Web Server Interface Page Descriptions ................................................................................ 6–10
6.4.4.1 Home Pages .................................................................................................................... 6–10
6.4.4.1.1 Home | Home ........................................................................................................... 6–10
6.4.4.1.2 Home | Contact ........................................................................................................ 6–11
6.4.4.2 Admin (Administration) Pages ........................................................................................ 6–11
6.4.4.2.1 Admin | Access ......................................................................................................... 6–11
6.4.4.3 Admin | SNMP ................................................................................................................ 6–12
6.4.4.3.1 Admin | FAST ............................................................................................................ 6–13
6.4.4.4 Admin | Firmware ........................................................................................................... 6–14
6.4.4.4.1 Admin | Auto Logout ................................................................................................ 6–15
6.4.4.4.2 Admin | VMS............................................................................................................. 6–16
6.4.4.5 Configuration Pages ........................................................................................................ 6–18
6.4.4.5.1 Configuration | Interface Pages ................................................................................ 6–18
6.4.4.5.1.1 Configuration | Interface | FE-Mgt .................................................................... 6–18
6.4.4.5.1.2 Configuration | Interface | GE ........................................................................... 6–20
6.4.4.5.1.3 Configuration | Interface | E1 Pages ................................................................. 6–22
6.4.4.5.2 Configuration | WAN Pages ...................................................................................... 6–25
6.4.4.5.2.1 Configuration | WAN | Demod (Demodulator) Pages ...................................... 6–25
6.4.4.5.2.2 Configuration | WAN | Mod (Modulator) Pages ............................................... 6–32
6.4.4.5.2.3 Configuration | WAN | QoS ............................................................................... 6–38
6.4.4.5.2.4 Configuration | WAN | Label ............................................................................. 6–44
6.4.4.5.2.5 Configuration | WAN | Compression ................................................................ 6–45
6.4.4.5.2.6 Configuration | WAN | BUC (Block Upconverter) ............................................. 6–46
6.4.4.5.2.7 Configuration | WAN | LNB (Low Noise Block Downconverter) ....................... 6–47
6.4.4.5.3 Configuration | Network Pages ................................................................................ 6–49
6.4.4.5.3.1 Configuration | Network | Routing Pages ......................................................... 6–49
6.4.4.5.3.2 Configuration | Network | ARP ......................................................................... 6–54
6.4.4.5.3.3 Configuration | Network | Working Mode........................................................ 6–55
6.4.4.5.3.4 Configuration | Network | DNS ......................................................................... 6–56
6.4.4.5.4 Configuration | ECM (Entry Channel Mode)............................................................. 6–57
6.4.4.5.5 Configuration | dSCPC (Dynamic Single Carrier per Channel) .................................. 6–60
6.4.4.6 Status Pages .................................................................................................................... 6–62
6.4.4.6.1 Status | Statistics Pages ............................................................................................ 6–62
6.4.4.6.1.1 Status | Statistics | Traffic ................................................................................. 6–62
6.4.4.6.1.2 Status | Statistics | Network Pages ................................................................... 6–64
6.4.4.6.1.3 Status | Statistics | Compression....................................................................... 6–65
6.4.4.6.1.4 Status | Statistics | QoS ..................................................................................... 6–66
6.4.4.6.1.5 Status | Statistics | E1 Pages (CDM-840 only) ................................................... 6–68
6.4.4.6.1.6 Status | Statistics | Trending (CDM-840 only) ................................................... 6–72
6.4.4.6.2 Status | Monitor ....................................................................................................... 6–74
6.4.4.7 Utility Pages .................................................................................................................... 6–75
6.4.4.7.1 Utility | Utility ........................................................................................................... 6–75
6.4.4.7.2 Utility | Reboot ......................................................................................................... 6–78
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CHAPTER 7.
7.1
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SERIAL-BASED REMOTE PRODUCT MANAGEMENT ...............................7–1
Introduction ....................................................................................................................... 7–1
7.2
Remote Commands and Queries Overview .......................................................................... 7–3
7.2.1 Basic Protocol ........................................................................................................................... 7–3
7.2.2 Packet Structure ....................................................................................................................... 7–4
7.2.2.1 Start of Packet ................................................................................................................... 7–4
7.2.2.2 Target Address .................................................................................................................. 7–5
7.2.2.3 Address Delimiter.............................................................................................................. 7–5
7.2.2.4 Instruction Code ................................................................................................................ 7–5
7.2.2.5 Instruction Code Qualifier ................................................................................................. 7–6
7.2.2.6 Optional Message Arguments........................................................................................... 7–7
7.2.2.7 End of Packet .................................................................................................................... 7–7
7.3
Remote Commands and Queries ......................................................................................... 7–8
7.3.2 Transmit (Tx) Parameters Commands and Queries................................................................ 7–11
7.3.3 Receive (Rx) Parameters Commands and Queries ................................................................. 7–13
7.3.4 Demodulator Status Commands and Queries ........................................................................ 7–15
7.3.5 Transmit (Tx) BERT Command or Query ................................................................................. 7–16
7.3.6 Receive (Rx) BERT Command or Query .................................................................................. 7–16
7.3.7 BUC (Block Upconverter) Parameters Commands and Queries ............................................. 7–17
7.3.8 LNB (Low-Noise Block Downconverter) Parameters Commands and Queries ...................... 7–18
7.3.9 Unit Parameters Commands and Queries .............................................................................. 7–19
7.3.10 Bulk Configuration String Commands..................................................................................... 7–27
7.3.11 Redundancy Commands and Queries .................................................................................... 7–27
7.3.12 Miscellaneous Utility Commands and Queries....................................................................... 7–28
APPENDIX A.
REFERENCE DOCUMENTATION .............................................................. A–1
A.1
FEC (FORWARD ERROR CORRECTION) OPTIONS .................................................................. A–2
A.2
Adaptive Coding and Modulation / Variable Coding and Modulation (ACM/VCM) ............... A–3
A.3
Bridge Point-to-Multipoint (BPM) Operation ...................................................................... A–4
A.4
E1 WAN/RAN Optimization ................................................................................................ A–4
A.5
Entry Channel Mode (ECM) ................................................................................................ A–5
APPENDIX B.
B.1
FEC (FORWARD ERROR CORRECTION) OPTIONS ................................ B–1
FEC Overview ......................................................................................................................B–1
B.2
DVB-S2: LDPC and BCH ........................................................................................................B–1
B.2.1 Range of Data Rates.................................................................................................................. B–2
B.2.2 BER, QEF, Eb/No, Es/No Spectral Efficiency, and Occupied Bandwidth .......................................... B–2
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B.3
VersaFEC (Short-block LDPC) ...............................................................................................B–3
B.3.1 Range of Data Rates.................................................................................................................. B–4
B.4
CDM-840 Rx/Tx Error Performance Characteristics...............................................................B–4
APPENDIX C.
C.1
BRIDGE POINT-TO-MULTIPOINT (BPM) OPERATION ............................. C–1
Introduction .......................................................................................................................C–1
C.2
Supported Network Configurations ..................................................................................... C–2
C.2.1 Flat Network ............................................................................................................................. C–2
C.2.2 Flat Network with Routers........................................................................................................ C–2
C.2.3 VLAN Trunking .......................................................................................................................... C–3
C.3
Packet Processing ...............................................................................................................C–3
C.3.1 Traffic Network / Ethernet Switch Behavior............................................................................. C–3
C.3.2 Management Network ............................................................................................................. C–4
C.4
IEEE 802.1Q Support ........................................................................................................... C–5
C.4.1 VLAN Trunking .......................................................................................................................... C–5
C.4.2 Access Mode Support ............................................................................................................... C–5
C.4.3 Multiple VLAN Tagging Support................................................................................................ C–6
C.5
Multicast BPM Behavior ...................................................................................................... C–6
C.5.1 Multicast Management/Routed Behavior (no change)............................................................ C–7
C.6
BPM and Group QoS with Outbound ACM/VCM .................................................................. C–7
C.7
Hub Network Configuration ................................................................................................ C–8
C.8
Compatible Features and Detailed Specifications ............................................................... C–12
C.9
Summary .......................................................................................................................... C–13
C.10
Glossary............................................................................................................................ C–14
APPENDIX D.
HEADER AND PAYLOAD COMPRESSION ............................................... D–1
D.1
Introduction ...................................................................................................................... D–1
D.1.1 Traffic Optimization ..................................................................................................................D–1
D.1.2 Compression Performance .......................................................................................................D–2
D.2
Operating, Configuring, and Monitoring Header and Payload Compression ......................... D–3
D.2.1 Enabling or Disabling Header and Payload Compression Operation .......................................D–3
D.2.2 Configuring Header and Payload Compression Refresh Rates .................................................D–4
D.2.3 Viewing Header and Payload Compression Statistics...............................................................D–6
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APPENDIX E. DATA COLLECTION ................................................................................... E–1
E.1
Introduction ....................................................................................................................... E–1
E.2
Initial Setup of Communications Between the CDM-840 and the User PC ............................. E–2
E.3
Collection of Pre-Reboot Diagnostic Information from the CDM-840 .................................... E–3
E.4
Collection of Post-Reboot Diagnostic Information from the CDM-840 ................................... E–5
E.5
Serial Adapter Cable Fabrication Specifications Reference.................................................... E–7
APPENDIX F. ENTRY CHANNEL MODE (ECM) ................................................................ F–1
F.1
Functional Overview ........................................................................................................... F–1
F.2
Entry Channel Mode Operation ........................................................................................... F–4
F.2.1 ECM Configuration using the Web Server Interfaces ............................................................... F–4
F.2.2 CDM-840 Remote Router Terminals ........................................................................................ F–5
F.2.3 CDD-880 Hub Channel Controller (HCC) ................................................................................... F–7
F.2.3.1 Tap Message ..................................................................................................................... F–7
F.2.3.2 HCC Configuration ............................................................................................................. F–7
F.2.3.3 Hub Operation .................................................................................................................. F–7
F.3
ECM Operational Scenarios ................................................................................................. F–9
F.3.1 Scenario 1 – VMS Initial Registration Process .......................................................................... F–9
F.3.2 Scenario 2 – Reverted or Auto-Recovered Messages............................................................... F–9
F.3.2.1 ECM Revert Cycle Timing .................................................................................................. F–9
F.3.2.2 ECMv2 Backoff Algorithm ............................................................................................... F–10
F.4
Glossary of Terms ............................................................................................................. F–12
APPENDIX G. WAN/RAN OPTIMIZATION ......................................................................... G–1
G.1
Overview ........................................................................................................................... G–1
G.1.1 Radio Access Network (RAN) ................................................................................................... G–1
G.1.2 RAN Inefficiency....................................................................................................................... G–2
G.2
E1 RAN Optimization.......................................................................................................... G–3
G.2.1 Process Overview..................................................................................................................... G–4
G.2.2 WAN Link Dimensioning and Pre-emptive Bandwidth Management ..................................... G–5
G.2.3 Performance Monitoring ......................................................................................................... G–7
G.2.3.1 Traffic Throughput (kbps) ................................................................................................ G–8
G.2.3.2 RAN Link Quality............................................................................................................... G–8
G.2.3.3 RANOp Savings ................................................................................................................. G–9
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TABLES
Table 3-1. REDUNDANCY Connector Pinouts ........................................................................................... 3–7
Table 3-2. CONSOLE Connector Pinouts .................................................................................................. 3–8
Table 3-3. ALARMS Connector Pinouts .................................................................................................... 3–9
Table B-1. The VersaFEC MODCOD Set ..................................................................................................... B–4
Table D-1. Comtech AHA GZip Performance Comparisons ......................................................................D–2
Table D-2. Comtech AHA GZip Performance Specifications Support .......................................................D–3
Table D-3. Compression Performance ......................................................................................................D–5
FIGURES
Figure 1-1. CDM-840 Remote Router ....................................................................................................... 1–1
Figure 1-2. Advanced VSAT Series Network Topology Example ............................................................... 1–1
Figure 1-3. CDM-840 Dimensional Envelope ............................................................................................ 1–4
Figure 1-4. CDM-840 – Front Panel View .................................................................................................. 1–5
Figure 1-5. CDM-840 – Rear Panel View ................................................................................................... 1–6
Figure 2-1. Unpacking and Inspecting the Shipment ................................................................................ 2–1
Figure 2-2. Installing the CDM-840 into a Rack Enclosure ........................................................................ 2–3
Figure 2-3. Installing the Optional Rear-Mounting Support Brackets Kit ................................................ 2–4
Figure 3-1. Coaxial Connector Examples................................................................................................... 3–1
Figure 3-2. D-Subminiature Connector Examples ..................................................................................... 3–3
Figure 3-3. CDM-840 Cabling Connections ............................................................................................... 3–5
Figure 3-4. CDM-840 Chassis Ground Interface ...................................................................................... 3–10
Figure 3-5. CDM-840 AC Power Interface ............................................................................................... 3–11
Figure 3-6. Applying AC Power to the CDM-840 ..................................................................................... 3–11
Figure 3-7. Replacing CDM-840 AC Fuses ............................................................................................... 3–12
Figure 3-8. CDM-840 DC Power Interface ............................................................................................... 3–13
Figure 3-9. Applying DC Power to the CDM-840..................................................................................... 3–13
Figure 3-10. Replacing CDM-840 DC Fuses ............................................................................................. 3–14
Figure 5-1. CDM-840 Web Server (HTTP) Interface – ‘ADMIN | FAST’ page ............................................ 5–2
Figure 6-1. CDM-840 Outdoor Remote Router Virtual Front Panel.......................................................... 6–5
Figure 6-2. CDM-840 Outdoor Remote Router Home Page ................................................................... 6–10
Figure 6-3. Admin | Access Page............................................................................................................. 6–11
Figure 6-4. Admin | SNMP Page ............................................................................................................. 6–12
Figure 6-5. Admin | FAST Page ............................................................................................................... 6–13
Figure 6-6. Admin | Firmware Page ........................................................................................................ 6–14
Figure 6-7. Admin | Auto Logout Page ................................................................................................... 6–15
Figure 6-8. Admin | VMS Page ................................................................................................................ 6–16
Figure 6-9. Configuration | Interface | FE-Mgt Page .............................................................................. 6–18
Figure 6-10. Configuration | Interface | GE page ................................................................................... 6–20
Figure 6-11. Configuration | Interface | E1 | Configuration Page .......................................................... 6–22
Figure 6-12. Configuration | Interface | E1 | Time Slots Page ............................................................... 6–24
Figure 6-13. Configuration | WAN | Demod | Config Page .................................................................... 6–25
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Figure 6-14. Configuration | WAN | Demod | ACM Page ...................................................................... 6–30
Figure 6-15. Configuration | WAN | Mod | Config Page ........................................................................ 6–32
Figure 6-16. Configuration | Mod | ACM Page....................................................................................... 6–36
Figure 6-17. Configuration | WAN | QoS Page ....................................................................................... 6–38
Figure 6-18. Configuration | WAN | QoS Page (cont.) ........................................................................... 6–39
Figure 6-19. Configuration | WAN | Label Page ..................................................................................... 6–44
Figure 6-20. Configuration | WAN | Compression Page......................................................................... 6–45
Figure 6-21. Configuration | WAN | BUC Page ....................................................................................... 6–46
Figure 6-22. Configuration | WAN | LNB Page ....................................................................................... 6–47
Figure 6-23. Configuration | Network | Routing | Routes Page............................................................. 6–49
Figure 6-24. Configuration | Network | Routing | IGMP Page ............................................................... 6–51
Figure 6-25. Configuration | Network | Routing | DHCP Page ............................................................... 6–53
Figure 6-26. Configuration | Network | ARP Page ................................................................................. 6–54
Figure 6-27. Configuration | Network | Working Mode Page ................................................................ 6–55
Figure 6-28. Configuration | Network | DNS Page ................................................................................. 6–56
Figure 6-29. Configuration | ECM Page .................................................................................................. 6–57
Figure 6-30. Configuration | dSCPC Page ............................................................................................... 6–60
Figure 6-31. Status | Statistics | Traffic Page.......................................................................................... 6–62
Figure 6-32. Status | Statistics | Network | Router Page ....................................................................... 6–64
Figure 6-33. Status | Statistics | Compression Page ............................................................................... 6–65
Figure 6-34. Status | Statistics | QoS Pages............................................................................................ 6–66
Figure 6-35. Status | Statistics | E1 | Transmit Page .............................................................................. 6–68
Figure 6-36. Status | Statistics | E1 | Receive Page ................................................................................ 6–70
Figure 6-37. Status | Statistics | Trending Page (20 minutes selected).................................................. 6–72
Figure 6-38. Status | Monitor Page ........................................................................................................ 6–74
Figure 6-39. Utility | Utility Page ............................................................................................................ 6–75
Figure 6-40. Utility | Reboot Page .......................................................................................................... 6–78
Figure A-1. Advanced VSAT Series Hub and Remote Site Products .......................................................... A–1
Figure B-1. The VersaFEC Codes versus Shannon Capacity ...................................................................... B–3
Figure B-2. DVB-S2 QPSK Packet Error Rate versus Es/No ........................................................................ B–1
Figure B-3. DVB-S2 8PSK Packet Error Rate versus Es/No ........................................................................ B–2
Figure B-4. DVB-S2 16APSK Packet Error Rate versus Es/No .................................................................... B–3
Figure B-5. DVB-S2 32APSK Packet Error Rate versus Es/No .................................................................... B–4
Figure B-6. VersaFEC Codec – BPSK, Rate 0.488 ....................................................................................... B–5
Figure B-7. VersaFEC Codec – QPSK, Rate 0.533, 0.631, 0.706 and 0.803................................................ B–6
Figure B-8. VersaFEC Codec – 8-QAM, Rate 0.642, 0.711, and 0.780....................................................... B–7
Figure B-9. VersaFEC Codec – 16-QAM, Rate 0.731, 0.780, 0.829 and 0.85............................................. B–8
Figure C-1. Advanced VSAT BPM “Sky Ethernet Switch” .......................................................................... C–1
Figure C-2. Flat Network ........................................................................................................................... C–2
Figure C-3. Flat Network with Routers...................................................................................................... C–2
Figure C-4. BPM with VLANs ..................................................................................................................... C–3
Figure C-5. Management Network in BPM Mode..................................................................................... C–4
Figure C-6. Multicast Behavior in BPM Mode ........................................................................................... C–6
Figure C-7. Configuring VLAN to QoS Group Mapping.............................................................................. C–7
Figure C-8. Hub Configuration – Standalone CTOG-250, No Redundancy ............................................... C–9
Figure C-9. Hub Network Configuration ................................................................................................. C–10
Figure C-10. Multiple CTOG-250 Outbounds in Redundant Mode ......................................................... C–11
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Figure D-1. Configuration | Routing | Routes page ..................................................................................D–3
Figure D-2. Configuration | WAN | Compression page ............................................................................D–4
Figure D-3. Configuration | WAN | MOD | ACM page ............................................................................D–5
Figure D-4. Status | Statistics | Compression page ..................................................................................D–6
Figure F-1. ECM – Message Processing Diagram ...................................................................................... F–1
Figure F-2. CDM-840 and CDD-880 ‘Configuration | ECM’ pages ............................................................ F–4
Figure F-3. ECM Message Processing – CDM-840 Remote Router ........................................................... F–6
Figure F-4. ECM Message Processing – CDD-880 Multi Receiver Router ................................................. F–8
Figure G-1. 2G / 3G Radio Access Network (RAN) ................................................................................... G–1
Figure G-2. Typical Abis Map ................................................................................................................... G–2
Figure G-3. RAN Optimization (GSM Abis Interface) ............................................................................... G–4
Figure G-4. Optimized Abis Traffic without Pre-emptive BW Management............................................ G–5
Figure G-5. Optimized Abis Traffic with Pre-emptive BW Management ................................................. G–6
Figure G-6. Status | Statistics | Trending Page ........................................................................................ G–7
xii
PREFACE
About this Manual
This manual provides installation and operation information for the Comtech EF Data CDM-840
Remote Router. This is an informational document intended for the persons responsible for the
operation and maintenance of the CDM-840.
Related Documents
•
Comtech EF Data ODM-840 Outdoor Remote Router /ODMR-840 Reduced Form Factor Outdoor
Remote Router Installation and Operation Manual (CEFD P/N MN-ODM840)
•
Comtech EF Data CTOG-250 Comtech Traffic Optimization Gateway Installation and Operation
Manual (CEFD P/N MN-CTOG250)
•
Comtech EF Data CDD-880 Multi Receiver Router Installation and Operation Manual (CEFD P/N
MN-CDD880)
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.
Warnings, Cautions, and Notes
A W AR NING G IV E S INF OR MAT ION AB OUT A P OS S IB L E HAZAR D T HAT MAY
C AUS E DE AT H OR S E R IOUS INJ UR Y .
A CAUTION gives information about a possible hazard that MAY CAUSE INJURY
or PROPERTY DAMAGE.
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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.
Examples of Multi-Hazard Notices
Recommended Standard Designations
The new designation of the Electronic Industries Association (EIA) supersedes Recommended
Standard (RS) designations. References to the old RS designations may be shown when depicting
actual text (e.g., RS-232) as displayed on the unit’s Web Server Interface pages or frontpanel
menus. All other references in the manual will be shown with the EIA designations.
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.
IF THE UNIT IS OPERATED IN A VEHICLE OR MOVABLE INSTALLATION, MAKE SURE
THE UNIT IS STABLE. OTHERWISE, EN 60950 SAFETY IS NOT GUARANTEED.
Electrical Installation
CONNECT THE UNIT TO A POWER SYSTEM THAT HAS SEPARATE GROUND, LINE AND
NEUTRAL CONDUCTORS. DO NOT CONNECT THE UNIT WITHOUT A DIRECT
CONNECTION TO GROUND.
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Sect 3.3 CDM-840 Ground and Power Connections
Operating Environment
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).
•
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.
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TO ENSURE THAT THE UNIT COMPLIES WITH THESE STANDARDS, OBEY THESE
INSTRUCTIONS:
•
Use coaxial cable that is of good quality for connections to the L-Band Type ‘N’ Rx
(receive) female connector.
•
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, refer to Warnings, Cautions and Notes listed 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, the unit should not be directly connected to the Public Telecommunications
Network.
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CE Mark
Comtech EF Data declares that the unit meets the necessary requirements for the CE Mark.
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
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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.
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.
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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.
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Notes:
xx
Chapter 1. INTRODUCTION
1.1
Overview
Figure 1-1. CDM-840 Remote Router
The CDM-840 Remote Router (Figure 1-1) is a point-to-multipoint router. It serves as the “spoke”
or remote site equipment component of Comtech EF Data’s Advanced VSAT Series group of
products.
Feature
A
B
Description
Hub Site
Typical Remote Site Cluster
Figure 1-2. Advanced VSAT Series Network Topology Example
Comtech’s Advanced VSAT Series group of products (Figure 1-2) are designed to support latencysensitive applications such as cellular backhaul over satellite, Universal Service Obligation (USO)
networks, corporate networks, Internet Service Providers, and other similar hub-and-spoke
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network environments that require high-performance, high-quality IP transport with “alwayson” availability.
The CDM-840 features one 10/100/1000 Gigabit Ethernet (GigE) interface, one 10/100 Fast
Ethernet (FE) interface, and provides WAN bandwidth optimization. It also features integrated
VersaFEC, a patented system of short-block codes that provide maximum coding gain with
lowest possible latency.
•
•
1.2
Sect. 1.3 CDM-840 Features
Sect. 1.4 CDM-840 Specifications
CDM-840 Functional Description
The CDM-840 Remote Router:
•
Transmits VersaFEC interoperable with Comtech EF Data’s CDD-880 Multi-Receiver
Router. The receive side supports DVB-S2 operation at L-Band up to 62 Msps, and is
compatible with Comtech EF Data’s CTOG-250 Comtech Traffic Optimization
Gateway/CDM-800 Gateway Router for Constant Coding and Modulation (CCM)
operation.
•
Features a high performance processor and a real-time operating system (RTOS)
combined with multiple Field Programmable Gate Arrays (FPGAs).
•
Runs on an embedded operating system in non-volatile Flash memory. It does not have
moving parts for media storage.
•
Supports reception and transmission of IP data over satellite links via two fundamentally
different types of interface – IF and data:
•
o
The IF interface provides a bidirectional link with the satellite via the uplink and
downlink equipment.
o
The data interface is a bidirectional path that connects the customer’s equipment
(assumed to be the Data Terminal Equipment, or DTE) to the unit (assumed to be
the Data Communications Equipment, or DCE). All terrestrial data is connected
using the available 10/100/1000 Gigabit Ethernet interface.
Includes support for ACM (Adaptive Coding and Modulation) and CCM (Constant Coding
and Modulation) operation:
o
CCM allows operators to define groups of remotes having different modulation
and coding parameters, as a means to improve efficiency on existing satellite
capacity.
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Introduction
o
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MN-CDM840
ACM allows the modulator to automatically and seamlessly adjust the transmitted
MODCOD as the environmentally conditions change to maintain QEF (Quasi Error
Free) operation.
On the Tx (transmit) side: The return modulator transmits IP datagrams and is compatible with
Comtech EF Data’s CDD-880 Multi-Receiver Router(s) located at a hub site.
In the FEC encoder, the data is differentially encoded, scrambled, and then VersaFEC-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, 8-QAM,
or 16-QAM modulator. The carrier is generated by a frequency synthesizer, and the I and Q signals
directly modulate this carrier to produce an IF output signal.
On the Rx (receive) side: The DVB-S2 demodulator supports enhanced GSE decapsulation and
label filtering for up to 2,047 unique labels.
DVB-S2 Receiver: The CDM-840’s demodulator supports DVB-S2 QPSK, 8-PSK, 16-APSK and 32APSK demodulation up to 62 Msps, with receive data rates up to 167 Mbps depending on the
modulation type and code rate.
In DVB-S2 operation, the receiver operates in the CCM mode. The receiver automatically detects
for spectral inversion and pilots ON/OFF, and supports spectral rolloff of 20%, 25% or 35%.
•
•
•
Sect. 1.3 CDM-840 Features
Sect. 1.4 CDM-840 Specifications
Appendix B. FEC (FORWARD ERROR CORRECTION) OPTIONS
Monitor and Control Interfaces: The unit is managed through multiple interfaces providing
options for both in-band and out-of-band monitor and control:
•
Sect. 6.3 (ETHERNET-BASED PRODUCT MANAGEMENT) SNMP (MIB II and
Private MIB)
Sect. 6.4 (ETHERNET-BASED PRODUCT MANAGEMENT) Web Server (HTTP)
Interface
Chapter 7. SERIAL-BASED REMOTE PRODUCT MANAGEMENT
•
•
On-site Firmware Updates: Field update of the operating system firmware is possible through
file upload via satellite or the Ethernet port.
Chapter 4. UPDATING FIRMWARE
On-site Operational Upgrades: Field activation of software-based options is possible through
Comtech’s FAST (Fully Accessible System Topology) Feature upgrade process.
•
•
Chapter 5. FAST ACTIVATION PROCEDURE
Sect. 6.4.4.2.3 (CDM-840 Web Server Interface) Admin | FAST Page
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1.3.1
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CDM-840 Features
Physical Description
The CDM-840 Remote Router is constructed as a 1RU-high rack-mounting chassis. Handles at
the front facilitate removal from and placement into a rack. The unit can be freestanding if
desired.
•
•
1.3.2
Sect. 1.4 CDM-840 Specifications
Sect. 2.1 Installation into a Rack Enclosure
Dimensional Envelope
Figure 1-3. CDM-840 Dimensional Envelope
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CDM-840 Physical Features
1.3.3.1
Front Panel
Figure 1-4. CDM-840 – Front Panel View
The CDM-840 Remote Router front panel (Figure 1-4) features eight Light-Emitting Diode (LED)
indicators. These LEDs convey operational states as follows:
LED
UNIT STATUS
STORED
EVENT
ONLINE
TEST MODE
TRANSMITTER
ON
Tx TRAFFIC
Rx TRAFFIC
GE
LINK/ACTIVITY
Condition
Green
Amber
Red
Amber
Off
Green
Off
Amber
Off
Green
Red
Off
Green (solid)
Green
(blinking)
Amber
Red
Off
Green (solid)
Green
(blinking)
Amber
Red
Off
Green (solid)
Green
(blinking)
Off
No Unit Faults or Alarms.
No Unit Faults, but an Alarm exists.
A Unit Fault exists (Example: PSU fault).
There is a Stored Event in the log, which can be viewed from the Web Server
Interface
There are no Stored Events.
The Unit is On Line, and carrying traffic.
The Unit is Off Line (standby) – forced by externally connected 1:1 or 1:N
redundancy system.
A Test Mode is selected
There is no Test Mode currently selected.
The Transmitter Carrier is On.
A Fault exists that causes the unit to turn off the carrier.
The Transmitter Carrier is Off.
No Tx Traffic Faults, no packets.
No Tx Traffic Faults, blinks when a packet is being transmitted to the satellite
link from this unit.
A Tx Traffic Alarm exists.
Tx Traffic has a Fault.
A Tx Traffic Fault exists.
No Rx Traffic Faults (demod and decoder are locked, everything is OK).
No Rx Traffic Faults, blinks when a packet is being received from the satellite
link to this unit.
Rx Traffic has an Alarm.
Rx Traffic has a Fault.
An Rx Traffic fault exists (the demod may still be OK).
Traffic Ethernet is connected, but no traffic exists.
Ethernet activity detected.
Traffic Ethernet is not connected.
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Rear Panel
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.
•
•
Sect. 3.2 CDM-840 Cabling Connections
Sect. 3.3 CDM-840 Grounding and Power Connections
External cables are attached to connectors provided on the rear panel of the unit (Figure 1-5).
(Top) Standard AC Unit
(Bottom) Optional 48V DC Unit
Figure 1-5. CDM-840 – Rear Panel View
1.3.3.2.1
Rear Panel Standard Features
The unit provides the following standard interfaces:
Data Interfaces:
•
(1X) 10/100/1000 BaseT Gigabit Ethernet RJ-45 Interface (ETHERNET | TRAFFIC GE port) for
Ethernet traffic.
•
(1X) 10/100 BaseT Fast Ethernet RJ-45 Interface for Ethernet-based management and
control purposes (HTTP/Web and SNMP) (ETHERNET | MANAGEMENT FE port).
•
(1X) DB-9F EIA-232 connector for serial remote control (CONSOLE port).
•
(1X) DB-15M connector for Form C unit alarms, analog Es/No, and Tx Mute (ALARMS port).
IF Interfaces:
•
(2X) Type ‘N’ female connectors for 50Ω L-Band (950 to 2150 MHz)
Power Interface:
•
100–240 VAC Primary Input Power Supply with Press-fit Fuse Holder
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Rear Panel Optional Features
The unit provides the following Data Interfaces for optional hardware and/or FAST-enabled
operation:
•
(2X) Type ‘BNC’ female connectors labeled “G.703 | IN / OUT” are provided for operation of
the optional G.703 E1 Interface / RAN Optimization FAST Feature upgrade.
•
(1X) DB-9M EIA-232 connector labeled “REDUNDANCY” for interoperability with a
separately purchased Comtech EF Data 1:1 or 1:N Redundancy Switch.
The following Power Interface Options are available from Comtech EF Data:
•
48 VDC Primary Input Power Supply with Screw-in Fuse Holders
•
24 VDC BUC 90 Watt Power Supply (AC Input or DC Input versions)
•
48 VDC BUC 150 Watt Power Supply (AC Input or DC Input versions)
The following Rear Panel Rack Support Brackets Kits are available from Comtech EF Data:
•
KT-0000168 4” Rear-Mounting Support Brackets Kit
•
KT-0000195 10” Rear-Mounting Support Brackets Kit
Sect. 2.2.1 Installing the Optional Rear-Mounting Support Brackets Kit
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CDM-840 Remote Router
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CDM-840 Specifications
1.4.1
Product Feature Specifications
Item
Description
8 Light-Emitting Diodes (LEDs):
UNIT STATUS (Green/Amber/Red)
STORED EVENT (Amber)
ONLINE (Green)
TEST MODE (Amber)
Front Panel
TRANSMITTER ON (Green/Red)
Tx TRAFFIC (Green/Amber/Red)
Rx TRAFFIC (Green/Amber/Red)
GE LINK/ACTIVITY (Green)
Data Interfaces
1X RJ-45 female port for 10/100/1000 BaseT Gigabit Ethernet data traffic
1X RJ-45 female port for 10/100 BaseT Fast Ethernet HTTP and SNMP product management
2X Type ‘BNC’ female connectors for G.703 E1, 2.048 Mbps (Unbalanced 75Ω)
DB-9F EIA-232 connector for serial remote monitor and control
DB-9M EIA-232 connector for 1:1 or 1:N redundancy switch operation
DB-15M connector for Form C unit alarms
Dimensional Envelope
19.0 W x 18.2 D x 1 RU (1.7) H inches (483 W x 462 D x 44 H mm)
Temperature
Operating
32° to 122°F (0° to 50°C)
Storage
-4° to 158°F (–20° to 70°C)
Humidity
95% maximum, non-condensing
Operating
Frequency
Tx
Connectors &
Impedance
Tx
Power supply
Rx
Rx
AC
LNB
50 Ω Type ‘N’ Female Connectors
100V to 240V AC, 47-63 Hz
DC (HW Option) 48V (36V to 60V) DC
Transmit Power
BUC
950 – 2150 MHz (L-Band)
0 to -40 dBm
Reference (10 MHz)
10.0 MHz ± 0.06 ppm, selectable ON/OFF, 0.0 dBm ± 3 dB
Power Supply
(HW Option)
24VDC, 4.17 Amps max., 90 W @ 50° C;
48VDC, 3.125 Amps max., 150W @ 50° C
Reference (10 MHz)
10.0 MHz ± 0.06 ppm, Selectable ON/OFF, -3.0 dBm ± 3 dB
Voltage
Selectable ON/OFF, 13V DC, 18V DC and 24V DC
Current
500 mA, maximum
Rx Monitoring
Es/No estimate, Receive Signal Level, Frequency Offset, BER, I&Q Constellation (FUTURE)
Adaptive Equalizer
5-tap, selectable, corrects up to 3 dB tilt
Acquisition Range
±100 kHz
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Item
Description
Supported Protocols
RFC 768 – UDP
RFC 791 – IP
RFC 792 – ICMP
RFC 793 – TCP
RFC 826 – ARP
RFC 856 – Telnet
RFC 862 – Ping
RFC 894 – IP
RFC 959 – FTP
RFC 1112 – IP Multicast
RFC 1213 – SNMP MIB II
RFC 1812 – IPv4 Routers
RFC 2045 – MIME
RFC 2474 – DiffServ
RFC 2475 – DiffServ
RFC 2578 – SMI
RFC 2597 – AF PHB
RFC 2598 – Expedite Forwarding
RFC 2616 – HTTP
RFC 3412 – SNMP
RFC 3416 – SNMPv2
RFC 3418 – SNMP MIB
Description
Item
Outbound (Hub to Remote)
Return (Remote to Hub)
Data Rate
1 – 168 Mbps
16 kbps – 15.35 Mbps
Symbol Rate
1 – 62 Msps (QPSK, 8-PSK)
1 – 47 Msps (16-APSK, 32-APSK)
16 ksps – 4.5 Msps
FEC
DVB-S2
VersaFEC
Modulation and Code Rates
• QPSK 1/2, 1/3, 1/4, 2/3, 2/5, 3/4, 3/5, 4/5, 5/6,
8/9, 9/10
• 8-PSK 2/3, 3/4, 3/5, 5/6, 8/9, 9/10
• 16-APSK 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
• 32-APSK 3/4, 4/5, 5/6, 8/9, 9/10
•
•
•
•
Rolloff
20%, 25% and 35%
20%, 25% and 35%
Encapsulation
Enhanced GSE
Streamline Encapsulation (SLE)
1.4.2
BPSK 0.488
QPSK 0.533, 0.631, 0.706, 0.803
8-QAM 0.642, 0.711, 0.780
16-QAM 0.731, 0.780, 0.829, 0.853
Bit Error Rate (BER)
Item
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
8QAM
(With two adjacent carriers,
each 7 dB higher than the
desired carrier)
Description
For:
BER=10-5
BER=10-8
For:
BER=10-5
BER=10-8
For:
BER=10-5
BER=10-8
Rate 0.488
Guaranteed Eb/No
(typical value in
parentheses):
2.4 dB (2.1 dB)
2.7 dB (2.4 dB)
Rate 0.533 QPSK
Guaranteed Eb/No
(typical value in
parentheses):
Rate 0.631 QPSK
Guaranteed Eb/No
(typical value in
parentheses):
Rate 0.706 QPSK
Guaranteed Eb/No
(typical value in
parentheses):
Rate 0.803 QPSK
Guaranteed Eb/No
(typical value in
parentheses):
2.3 dB (2.0 dB)
2.5 dB (2.2 dB)
Rate 0.642 8QAM
Guaranteed Eb/No
(typical value in
parentheses):
2.8 dB (2.5 dB)
3.0 dB (2.7 dB)
Rate 0.711 8QAM
Guaranteed Eb/No
(typical value in
parentheses):
3.3 dB (3.0 dB)
3.7 dB (3.4 dB)
Rate 0.780 8QAM
Guaranteed Eb/No
(typical value in
parentheses):
3.8 dB (3.5 dB)
4.1 dB (3.8 dB)
4.6 dB (4.3 dB)
4.9 dB (4.6 dB)
5.2 dB (4.9 dB)
5.5 dB (5.2 dB)
5.6 dB (5.3 dB)
6.0 dB (5.7 dB)
1–9
CDM-840 Remote Router
Introduction
Item
Description
VersaFEC CODEC BER
16QAM
(With two adjacent carriers,
each 7 dB higher than the
desired carrier)
Monitor Functions
1.4.3
Revision 2
MN-CDM840
Rate 0.731
16QAM
Guaranteed Eb/No
(typical value in
parentheses):
Rate 0.780 16QAM
Guaranteed Eb/No
(typical value in
parentheses):
Rate 0.829 16QAM
Guaranteed Eb/No
(typical value in
parentheses):
For:
BER=10-5
6.4 dB (6.1 dB)
7.0 dB (6.7 dB)
7.5 dB (7.2 dB)
BER=10-8
6.6 dB (6.3 dB)
7.3 dB (7.0 dB)
7.8 dB (7.5 dB)
Eb/No estimate: 3 to 12 dB with ± 0.5 dB accuracy
Corrected Bit Error Rate: 1E-3 to 1E-9
Frequency offset: ± 32 kHz range,100 Hz resolution
Signal Strength Indicator: 0-60 dB range relative to maximum gain
Rate 0.853 16QAM
Guaranteed Eb/No
(typical value in
parentheses):
8.0 dB (7.7 dB)
8.3 dB (8.0 dB)
Standard Assemblies
CEFD Item No.
Description
Where Installed
PL-0020642
CDM-840 Base AC Chassis Assembly
–
PL-0000714
CDM-840 PCB Assembly
Cartridge Fuse, 2.5A 250VAC 5x20mm Slow Blo fuse, 213
series
In CDM-840 chassis
FS-0000030
1.4.4
Optional Assemblies
CEFD Item No.
KT-0000168
Description
CDM-840 100-240V AC unit w/24V DC 90W @ 50°C BUC
Power Supply
CDM-840 100-240V AC unit w/48V DC 150W @ 50°C BUC
Power Supply
CDM-840 Base 48V DC Chassis Assembly
CDM-840 48V DC unit w/24V DC 90W @ 50°C BUC Power
Supply
CDM-840 48V DC unit w/48V DC 150W @ 50°C BUC Power
Supply
Rear-Mounting Support Bracket (4”)
KT-0000195
Rear-Mounting Support Bracket (10”)
PL-0000881
PL-0000883
PL-0020644
PL-0000974
PL-0000975
1.4.5
In CDM-840 chassis
Regulatory Compliance
Entity
FCC
Description
• EN 30489-1
• EN 55022 Class B (Emissions)
• EN 55024 (Immunity)
• EN 60950 (Safety)
FCC Part 15 Subpart B
RoHS Compliance
Yes
“CE” as follows:
1–10
Where Installed
In CDM-840 chassis
In CDM-840 chassis
–
In CDM-840 chassis
In CDM-840 chassis
Sides of CDM-840 chassis / rear
of user-supplied mounting rack
Chapter 2. INSTALLATION
2.1
Unpacking and Inspecting the Shipment
Figure 2-1. Unpacking and Inspecting the Shipment
The CDM-840 Remote Router, its Installation and Operation Manual, and its power cord were
packaged and shipped in a reusable cardboard carton containing protective foam spacing.
This equipment contains parts and assemblies sensitive to damage by Electrostatic
Discharge (ESD). Use ESD precautionary procedures when handling the equipment.
2–1
CDM-840 Remote Router
Installation
Revision 2
MN-CDM840
Once opened, inspect the shipment (Figure 2-1):
Step
2.2
Task
1
Keep all shipping materials for storage or reshipment.
2
Check the packing list to ensure the shipment is complete.
3
Inspect the equipment for any possible damage incurred during shipment. Contact
the carrier and Comtech EF Data immediately to submit a damage report if damage is
evident.
4
Review this CDM-840 Remote Router Installation and Operation Manual
carefully to become familiar with operation.
5
Proceed to Sect. 2.2 Installing Into a Rack Enclosure.
Installing Into a Rack Enclosure
When mounting the CDM-840 into a rack enclosure (Figure 2-2):
•
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.
•
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.
o
Air temperature inside the rack enclosure should never exceed 50°C
(122°F).
For information about custom rack enclosures, contact Comtech EF Data
Customer Support during normal business hours or visit Comtech EF Data’s Web
site (www.comtechefdata.com/support.asp).
•
The CDM-840 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
Customer Support during normal business hours.
2–2
CDM-840 Remote Router
Installation
Feature
Revision 2
MN-CDM840
Description
1
Custom Rack Enclosure
2
CDM-840 Remote Router
3
Standard Rack Shelving
Rack Enclosure Threaded Front
Mounting Rail (typical)
Unit Front Panel
User-supplied Screws
4
5
6
Figure 2-2. Installing the CDM-840 into a Rack Enclosure
Mount the CDM-840 in its assigned position in the rack enclosure. 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-0000168 (4”) or KT-0000195 (10”) Rear-Mounting
Support Brackets Kit (Figure 2-3).
2–3
CDM-840 Remote Router
Installation
Revision 2
MN-CDM840
2.2.1 Installing the Optional Rear-Mounting Support Brackets Kit
Feature
Description
1
Back of Unit
2
Rack Enclosure Threaded Rear Mounting Rail (typical)
KT-0000XXX Primary Rear Support Bracket Kit
Item
Quantity
CEFD Part Number
Description
2
FP-0000913
Plate, Adapter
4
4
HW/10-32X3/8FLT
Screw, #10 Flat Head
1
–
KT/6228-2
4” Rear Support Bracket Kit
–
1
KT/6228-3
10” Rear Support Bracket Kit
KT-0000168
KT-0000195
1
2
2
3
KT/6228-X Rear Support Bracket Kit
Item
Quantity
CEFD Part Number
Description
2
HW/10-32SHLDR
Screw, #10 Shoulder
4
4
HW/10-32FLT
Washer, #10 Flat
C
2
2
HW/10-32SPLIT
Washer, #10 Split
D
2
2
HW/10-32HEXNUT
Nut, #10 Hex
E
4
4
HW/10-32x1/2RK
Bolt, #10 Rack Bracket
2
–
FP/6138-2
Bracket, Rear Support – 4”
–
2
FP/6138-3
Bracket, Rear Support – 10”
KT/6228-2
KT/6228-3
A
2
B
F
Figure 2-3. Installing the Optional Rear-Mounting Support Brackets Kit
2–4
CDM-840 Remote Router
Installation
Revision 2
MN-CDM840
Tools needed to install the KT-0000168 (4”) or KT-0000195 (10”) Bracket Kit (Figure 2-3):
•
A medium Phillips screwdriver
•
A 5/32-inch SAE Allen Wrench
•
An adjustable Crescent wrench.
Follow these steps to install the Radyne-style chassis kit:
Step
Description
1
Assemble the Adapter Plates to the back side of the CDM-840 chassis using the #10 Flat Head Screws.
2
Assemble the #10 S houlder S crews t hrough t he A dapter Plate m ounting s lots us ing t he #10 Flat
Washers, #10 Split Washers, and #10 Hex Nuts.
3
Mount the Rear Support Brackets to the rack enclosure threaded rear mounting rails using the #10
Rack Bracket Bolts.
4
Slide t he CDM-840 into t he f ront of t he r ack e nclosure. M ake s ure t hat t he # 10 S houlder Screws
properly engage into the slots of the Rear Support Brackets.
2–5
CDM-840 Remote Router
Installation
Revision 2
MN-CDM840
Notes:
2–6
Chapter 3. REAR PANEL
CONNECTIONS
3.1
Cabling Connection Types
The CDM-840 Remote Router uses a number of different cables. Each cable type is typically
dedicated to a specific mode of operation.
Not all of these operational interface types may be available with this product.
3.1.1
Coaxial Cable Connections
Coupling Type
Connector Type
Plug
Jack
Bayonet
(Type ‘BNC’ shown)
Threaded
(Type ‘N’ shown)
Figure 3-1. Coaxial Connector Examples
The types of coaxial cables used by Comtech EF Data are ‘BNC’, ‘TNC’, ‘N’, ‘F’, and ‘SMA’. Coaxial
cables (plugs) and their mating connectors (jacks/sockets) are available in two coupling styles:
Bayonet or Threaded.
3–1
CDM-840 Remote Router
Rear Panel Connections
Revision 2
MN-CDM840
•
Bayonet Coupling Style: The jack has a pair of guide posts that accommodate the plug’s
lockdown slots. This lockdown design provides secure assembly without over-tightening
the connection.
•
Threaded Coupling Style: The jack features external threads. The plug shell features
internal threads, and has either a knurled outer surface to permit hand-tightening of the
connection, or hex flats to accommodate torqued installation.
Connection Instructions:
3.1.1.1
•
Bayonet Coupling Connections: Use the plug slots to guide, then slide the plug onto the
jack posts. Then, turn the plug clockwise until the jack posts are fully seated within the
plug slot.
•
Threaded Coupling Connections: Engage the plug onto the jack threads, and then turn
the plug clockwise until it is fully threaded onto the jack. Do not over-tighten the
connection.
Type ‘BNC’
BNC plugs and jacks feature a Bayonet Coupling design.
3.1.1.2
Type ‘TNC’
TNC plugs and jacks feature a Threaded Coupling design
similar to Type ‘N’, Type ‘F,’ and Type ‘SMA’ connectors.
3.1.1.3
Type ‘N’
Type ‘N’ connectors feature a Threaded Coupling design
similar to Type ‘TNC’, Type ‘F’, and Type ‘SMA’
connectors.
3–2
CDM-840 Remote Router
Rear Panel Connections
3.1.1.4
Revision 2
MN-CDM840
Type ‘F’
Type ‘F’ connectors feature a Threaded Coupling design
similar to Type ‘TNC’, Type ‘N’, and Type ‘SMA’
connectors.
3.1.1.5
Type ‘SMA’ (Subminiature Version ‘A’)
Type ‘SMA’ connectors feature a Threaded Coupling
design similar to Type ‘TNC’, Type ‘N’, and Type ‘F’
connectors.
3.1.2
D-Subminiature Cable Connections
Type ‘D’ Connection Type
Example
Chassis Receptacles:
Female (top)
Male (bottom)
Type ‘D’ Cable with Jack Screws
(female shown)
Figure 3-2. D-Subminiature Connector Examples
D-Subminiature connectors are also called Type ‘D’ or ‘D-Sub’ connectors. The connector pair
features multiple rows of pins (male side) coupled to mating sockets (female side). The cable
plug and chassis receptacle each feature a D-shaped profile that interlock to ensure proper pin
orientation and connector seating.
Either chassis receptacle gender features two jack nuts for secure assembly of the cable plug to
the chassis receptacle.
Whether its gender is male or female, the cable plug features two jack screws for secure
connection to the jack nuts provided on the mating chassis receptacle. The jack screws may be
hand tightened or tightened with a standard flat-blade screwdriver.
3–3
CDM-840 Remote Router
Rear Panel Connections
Revision 2
MN-CDM840
Connection Instructions: Orient the plug to the receptacle in the proper position. Press firmly
into place. Use the jack screws to secure the plug to the receptacle jack nuts. Do not overtighten.
3.1.3
Circular Cable Connections
Circular connectors are intended for weatherproof outdoor applications. The connector pairs
feature a sleeve lock configuration, with an array of pins (male side) coupled to mating sockets
(female side).
Feature
Description
1
Primary Alignment features
2
Secondary Alignment features
3
Sleeve Lock features
Connection Instructions: Engage all of the alignment and lock features
between the male connector (on the interconnection cable) and
female socket (e.g., the ODM/R-840 CONSOLE/REDUNDANCY port or
the POWER port).
To install the male connector into the female connector:
1. Engage the primary and secondary alignment tabs on the male
connector with the mating cutouts on the female socket.
2. Push the male connector into the female socket.
3. Turn the male connector sleeve clockwise until the sleeve lock
cutouts engage fully with the female socket tabs and you hear a
“click” sound
3.1.4
RJ-45, RJ-48 Cable Connections
The plug for an RJ-45 or RJ-48 cable features a flexible tab. The RJ-45 or RJ-48
jack features a mating slot. This design configuration assures proper
installation and pin orientation.
Connection Instructions: Press down the tab on the cable plug, and then
insert the plug into the RJ-4x jack. The connection is complete when the tab
‘clicks’ into position inside the jack.
3–4
CDM-840 Remote Router
Rear Panel Connections
3.2
Revision 2
MN-CDM840
CDM-840 Cabling Connections
(Top) Standard AC Unit
(Bottom) Optional 48V DC Unit
Figure 3-3. CDM-840 Cabling Connections
The CDM-840 rear panel connectors, shown here in Figure 3-3 provide all necessary external
connections between the unit and other equipment. The table that follows summarizes the
connectors provided here, grouped according to service function.
Sect. Service Type Connector Name
3.2.1
3.2.2
3.2.3
IF Group
Terrestrial
Data Group
Utility Group
Connector Type
Connector Function
L-BAND Rx
50Ω Type ‘N’ female
L-Band Input
L-BAND Tx
50Ω Type ‘N’ female
L-Band Output
G.703
OUT
BNC female
G.703 E1 Input
IN
BNC female
G.703 E1 Output
TRAFFIC | GE
RJ-45 female
10/100/1000 BaseT Gigabit
Ethernet interface (IEEE 802.3ab)
MANAGEMENT | FE
RJ-45 female
10/100 BaseT Fast Ethernet
management/data interface (IEEE
802.3u)
REDUNDANCY
9-pin Type ‘D’ female
For connection to an optional 1:1
or 1”N CEFD Redundancy Switch
CONSOLE
9-pin Type ‘D’ male
Serial Remote Interface (EIA-232)
ALARMS
15-pin Type ‘D’ male
Unit Alarms
The European EMC Directive (EN55022, EN50082-1) requires using properly shielded
cables for DATA I/O. These cables must be double-shielded from end-to-end, ensuring a
continuous ground shield.
See Sect. 3.1 Cabling Connections Types for information about each connector type
and its connection instructions.
3–5
CDM-840 Remote Router
Rear Panel Connections
3.2.1
Revision 2
MN-CDM840
IF Connector Group
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
3.2.2
3.2.2.1
‘L-BAND Rx’ IF Connector
Connector Type
Ref Des
Description
Direction
Type ‘N’ 50Ω Female
L-BAND Rx
Rx IF Signal, L-Band
In
Connector Type
Name
Description
Direction
Type ‘N’ 50Ω Female
L-BAND Tx
Tx IF signal, L- Band
Out
‘L-BAND Tx’ IF Connector
Terrestrial Data Connector Group
‘G.703 | OUT’ / ‘G.703 | IN’ Connectors
Connector Type
BNC female
3.2.2.2
Name
Direction
G.703 | OUT
Out
G.703 | IN
In
‘TRAFFIC | GE’ (Gigabit Ethernet) Connector
Connector Type
Name
Direction
RJ-45 female modular jack
TRAFFIC | GE
In/Out
•
This interface operates at 10/100/1000 Mbps, half and full duplex, autonegotiating.
•
The maximum Ethernet packet size is 1522 bytes (including Ethernet headers and
CRC).
3–6
CDM-840 Remote Router
Rear Panel Connections
3.2.3
3.2.3.1
3.2.3.2
Revision 2
MN-CDM840
Utility Connector Group
‘MANAGEMENT | FE’ (Fast Ethernet) Connector
Connector Type
Name
Direction
RJ-45 female modular jack
TRAFFIC | GE
In/Out
•
This interface operates at 10/100 Mbps, half and full duplex, auto-negotiating.
•
The maximum Ethernet packet size is 1522 bytes (including Ethernet headers and
CRC)
‘REDUNDANCY’ Connector
Connector Type
Name
Type ‘D’ 9-pin female
REDUNDANCY
Direction
In/Out
Use this interface for connection to an optional CEFD 1:1 or 1:N Redundancy Switch.
Table 3-1. REDUNDANCY Connector Pinouts
Pin #
1
6
2
7
Description
Direction
Ground
–
Transmit Serial Data – auxiliary channel
Out
Receive Serial Data – auxiliary channel
In
Redundancy Out 1
3
8
Redundancy In 1
Redundancy Out 2
4
9
Redundancy In 2
Fused +12 volt
5
Ground
Out
In
Out
In
Out
–
3–7
CDM-840 Remote Router
Rear Panel Connections
3.2.3.3
Revision 2
MN-CDM840
‘CONSOLE’ Interface Connector
Connector Type
Name
Type ‘D’ 9-pin male
CONSOLE
Direction
In/Out
This interface is used for EIA-232 communications. It is intended for connection to an
M&C computer or VT (Video Terminal) device.
Table 3-2. CONSOLE Connector Pinouts
Pin #
1
6
2
7
3
8
4
9
Description
Direction
Ground
–
Reserved - do not connect to this pin
–
EIA-232 Transmit Data
Out
Reserved - do not connect to this pin
–
EIA-232 Receive Data
In
Reserved - do not connect to this pin
–
Reserved - do not connect to this pin
–
Reserved - do not connect to this pin
–
5
–
3–8
CDM-840 Remote Router
Rear Panel Connections
3.2.3.4
Revision 2
MN-CDM840
‘ALARMS’ Interface Connector
Connector Type
Name
Direction
Type ‘D’ 15-pin male
ALARMS
In/Out
Pin 2 of this connector provides an analog signal to aid antenna pointing or for
driving step-track equipment. The analog signal will be zero volts when the unit is
not locked to a carrier. When locked to a carrier the analog signal will be 1 volt for
Es/No values less than or equal to -4.69 dB, or 10 volts for Es/No values greater than
or equal to 20dB as depicted in the following chart:
Table 3-3. ALARMS Connector Pinouts
PIN #
1
9
2
10
3
11
4
12
5
13
6
14
7
15
8
SIGNAL FUNCTION
NAME
GROUND
GND
EXT CARRIER OFF
EXT-OFF
ES/NO VOLTAGE (0 TO 10 VOLTS)
ES/NO
RESERVED +3.3V INPUT CMOS LEVEL
N/C
NO CONNECTION
N/C
NO CONNECTION
N/C
UNIT FAULT
UNIT-COM
UNIT FAULT (ENERGIZED, NO FAULT)
UNIT-NO
UNIT FAULT (DE-ENERGIZED, FAULTED)
UNIT-NC
TX TRAFFIC
TX-COM
TX TRAFFIC (ENERGIZED, NO FAULT)
TX-NO
TX TRAFFIC (DE-ENERGIZED, FAULTED)
TX-NC
RX TRAFFIC
RX-COM
RX TRAFFIC (ENERGIZED, NO FAULT)
RX-NO
RX TRAFFIC (DE-ENERGIZED, FAULTED)
RX-NC
3–9
CDM-840 Remote Router
Rear Panel Connections
3.3
3.3.1
Revision 2
MN-CDM840
CDM-840 Ground and Power Connections
Chassis Ground Interface
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.
(Top) Standard AC Unit
(Bottom) Optional 48V DC Unit
Figure 3-4. CDM-840 Chassis Ground Interface
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.
3–10
CDM-840 Remote Router
Rear Panel Connections
3.3.2
Revision 2
MN-CDM840
115V/230V Alternating Current (AC) Power Interface (Standard)
Feature
Description
1
On / Off Switch
2
Press-fit Fuse Holder
3
IEC Three-prong Connector
AC Power Specifications
Input Power
40W maximum, 20W typical (without BUC)
245W maximum (with BUC)
Input Voltage
100V to 240V AC, +6%/-10%, autosensing
(total absolute max. range is 90V to 254V AC)
Connector Type
IEC
Fuse Protection
Line and neutral fusing
(2X) 5mm x 20mm Slow-blow type fuses:
T2.5A (2.5A) (115V or 230V AC operation – without BUC)
T4A (4.0A) (115V or 230V AC operation – with BUC)
Figure 3-5. CDM-840 AC Power Interface
3.3.2.1
AC Operation – Applying Power
Figure 3-6. Applying AC Power to the CDM-840
To apply AC power to the CDM-840:
•
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.
3–11
CDM-840 Remote Router
Rear Panel Connections
3.3.2.2
Revision 2
MN-CDM840
AC Operation – Replacing Fuses
The CDM-840 uses two 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
power supply module located on the rear panel (Figure 3-7).
Figure 3-7. Replacing CDM-840 AC Fuses
To replace the fuses:
DISCONNECT THE POWER SUPPLY BEFORE PROCEEDING!
•
•
First, unseat the fuse holder from the IEC power module.
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 fuses as needed.
o
Use T2.5A (2.5 Amp) fuses for standard operation.
o
Use T4A (4 Amp) fuses when a Block Upconverter (BUC) is installed.
FOR CONTINUED OPERATOR SAFETY, ALWAYS REPLACE THE FUSES WITH THE
CORRECT TYPE AND RATING.
•
Finally, re-seat the fuse holder in the IEC power module.
3–12
CDM-840 Remote Router
Rear Panel Connections
3.3.3
Revision 2
MN-CDM840
48V Direct Current (DC) Power Interface (Optional)
Feature
Description
1
On / Off Switch
2
Screw-in Fuse Holders / Receptacles
3
Power Terminal Block
DC Power Specifications
Input Power
25W (typical)
245W (maximum with BUC)
Input Voltage
48V DC, nominal
(36V to 60V)
Connector Type
Terminal Block
Fuse Protection
(2X) 5mm x 20mm Slow-blow type fuses:
T3A (3.0A) Main
T5A (5.0A) (BUC)
Figure 3-8. CDM-840 DC Power Interface
3.3.3.1
DC Operation – Applying Power
Figure 3-9. Applying DC Power to the CDM-840
To apply DC power to the CDM-840:
•
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.
3–13
CDM-840 Remote Router
Rear Panel Connections
3.3.3.2
Revision 2
MN-CDM840
DC Operation – Replacing Fuses
The fuses are contained within individual screw-in receptacles located below the power supply
terminal block (Figure 3-10).
Figure 3-10. Replacing CDM-840 DC Fuses
To replace the fuses:
DISCONNECT THE POWER SUPPLY BEFORE PROCEEDING!
•
First, unscrew either fuse holder from its receptacle. Then, remove and replace the
fuse(s):
o
Use T3A (3 Amp) fuses for standard operation
o
Use T5A (5 Amp) fuses when a Block Upconverter (BUC) is installed.
FOR CONTINUED OPERATOR SAFETY, ALWAYS REPLACE THE FUSES WITH
THE CORRECT TYPE AND RATING.
•
Screw either fuse holder back into its receptacle.
3–14
Chapter 4. UPDATING FIRMWARE
4.1
Updating Firmware via the Internet
TO ENSURE OPTIMAL PERFORMANCE, IT IS IMPORTANT TO OPERATE THE CDM-840
WITH ITS LATEST AVAILABLE FIRMWARE.
The CDM-840 Remote Router is factory-shipped with the latest version of operating firmware.
Firmware updates may be applied to an in-service CDM-840 without having to remove the
chassis cover. If a firmware update is needed, it can be acquired:
•
Over satellite;
•
From Comtech EF Data Product Support via e-mail or on CD by standard mail delivery.
Use the CDM-840 to accomplish the firmware update process as follows:
•
Establish the proper communications link for acquiring the firmware update archive files
over satellite or by connecting the rear panel ‘Management | FE’ 10/100 Fast Ethernet
port to the Ethernet port of a user-supplied PC.
•
Download the firmware update archive file from the Internet to the user PC.
•
Transfer the extracted firmware update via File Transfer Protocol (FTP) from the user PC
to the CDM-840 by directing the FTP client (using the CDM-840 Management IP
Address) to connect to an FTP server.
4–1
CDM-840 Remote Router
Updating Firmware
4.2
Revision 2
MN-CDM840
Getting Started: Preparing for the Firmware Download
1. First, identify the CDM-840 assigned Management IP Address, and the firmware
number/revision letter/version number.
User-supplied items needed:
•
A Microsoft Windows-based PC, equipped with available serial and Ethernet ports; a
compatible Web browser (e.g., Internet Explorer); and a terminal emulator program
(e.g., Tera Term or HyperTerminal).
•
A 9-pin serial cable to connect the PC to the CDM-840.
A. Use the 9-pin serial cable to
connect the CDM-840 ‘CONSOLE’
port to a serial port on the user PC.
B. On the PC: Open the terminal emulator program.
Refer to your terminal emulator program HELP feature or user guide for operating
and configuration instructions.
Configure the utility program serial port communication and terminal display operation:
• 38400 bps (Baud Rate)
• 8 Data Bits
• 1 Stop Bit
• Parity = NO
• Port Flow Control = NONE
• Display New line Rx/Tx: CR
• Local Echo = ON
C. On the CDM-840: Turn on the power.
(Left) Standard CDM-840 115V/230V AC Unit
(Right) Optional CDM-840 48V DC Unit
D. On the PC: Make note
of the information
displayed on the CDM840 Serial Interface:
4–2
CDM-840 Remote Router
Updating Firmware
•
•
•
Revision 2
MN-CDM840
Management IP Address (e.g., default is 192.168.1.12/24)
Firmware Number and Revision Letter (e.g., FW-0000408W)
Firmware Release Version (e.g., 1.5.1.X)
See Chapter 7. SERIAL-BASED REMOTE PRODUCT MANAGEMENT for
information and instructions on using the CDM-840 Serial Interface.
E. Alternately, use the CDM-840 Web Server Interface to obtain the firmware information.
•
Use an Ethernet hub, switch, or direct
cable connection to connect the CDM-840
‘MANAGEMENT | FE’ 10/100 Fast Ethernet
port to the PC.
•
On the PC: Use a Web browser (e.g., Internet Explorer) to log in to the CDM-840 Web
Server Interface and access the ‘Admin | Firmware’ page. Then, make note of the Slot
#1 and Slot #2 firmware loads:
See Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT for
information and instructions on using the CDM-840 Web Server Interface.
2. Next, create a temporary folder (subdirectory) on the user PC for the firmware archive
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.
There are several ways to create a temporary folder on a Windows-based PC:
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.
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Updating Firmware
•
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MN-CDM840
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 Explorer to create and rename the temporary folder.
•
Select File > New > Folder to create the temporary folder. The new folder will be
created in the active folder.
•
Right-click the “New Folder” folder name, and then rename this folder to "temp" or
some other convenient, unused name.
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.
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D. 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-DOS 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.
o
Finally, from the Command-line prompt (c:\>), type “mkdir temp” or “md
temp” (mkdir and md stand for make directory), and then click [OK].
There should now be a "temp" folder created and available for placement of the firmware file
download.
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CDM-840 Remote Router
Updating Firmware
4.3
Revision 2
MN-CDM840
Downloading and Extracting the Firmware Update
1. First, download the firmware update file from the Comtech EF Data Web site:
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)
Advanced VSAT Series hyperlink.
E. On the Advanced VSAT Solutions product page – select the CDM-840 product hyperlink;
F. Select the appropriate firmware archive EXE or ZIP file download hyperlink.
•
About Firmware Numbers, File Versions, and Formats: The Comtech EF
Data Web site catalogues its firmware update files by product type (e.g.,
router, modem, etc.), the specific model, and optional hardware
configurations.
The
CDM-840 firmware
download hyperlink
appears as
F0000408X_V####, where ‘X’ denotes the revision letter, and ‘####’
represents the firmware version (e.g., V1512 = Version 1.5.1.2).
•
About File Archive Formats: Comtech EF Data provides its downloadable
files in two compressed archive formats: *.exe (self-extracting) and *.zip
(compressed).
The *.exe file does not require a file archiver and compression utility
program such as PKZIP for Windows, WinZip, ZipCentral, etc. (PKZIP for
DOS is not supported due to file naming conventions). Comtech EF Data
does not provide this utility program.
Some firewalls do not allow the download of *.exe files. Download the
*.zip file instead, and extract the firmware files from the archive
download with a user-supplied utility program. For detailed information
on handling archived files, refer to the utility program Help
documentation.
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]:
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o
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.
o
Click [Save] to open the ‘Save As’ window. Be sure to select and [Save] the
archive *.exe or *.zip file to the “temp” folder created earlier.
o
Otherwise, click [Cancel] to quit and exit the file download process.
2. Next, extract the firmware files from the archive file.
•
(If not already done with File Download > [Open]) Extract the firmware files from the
downloaded *.exe or *.zip archive file with the user-supplied utility program:
o
Double-click on the archive file name, and then follow the prompts provided by the
user-supplied utility program. Extract, at a minimum, two files:

FW0000408x_CDM840.bin – the Firmware Bulk image file (where ‘x’ denotes
the revision letter), and

CDM-840ReleaseNotes_v#-#-#.pdf – the Firmware Release Notes PDF file
(where ‘#-#-#’ denotes the firmware version number).
3. Confirm
availability
of
the
firmware
files
in
the
temporary
folder.
There are several ways you may view the contents of the temporary folder on a Windowsbased 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 doubleclick the “c:\temp” folder.
B. Using Command-line:
•
Type “cd c:\temp” at the Command-line prompt to change to the temporary
directory created earlier using Command-line.
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•
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Type “dir” to list the files extracted to the temporary directory from the
downloaded archive file.
The firmware files have been successfully downloaded and are now available for transfer to
the CDM-840.
4.4
Performing the Ethernet FTP Upload Procedure
To proceed with the firmware update procedure, assumptions are made that:
•
The CDM-840 is connected to a user-supplied, Windows-based PC, and:
o
The PC serial port is connected to the CDM-840 ‘CONSOLE’ port.
o
The PC Ethernet port is connected to the CDM-840 ‘MANAGEMENT | FE’
10/100 BaseT Ethernet port with a user-supplied hub, switch, or direct
Ethernet cable connection.
o
The PC is running a terminal emulation program (for operation of the
CDM-840 Serial Interface) and a compatible Web browser (for operation
of the CDM-840 Web Server Interface).
•
The CDM-840 Management IP Address has been noted using the CDM-840
Serial Interface, and the firmware has been identified using either the Serial
Interface or the CDM-840 Web Server Interface ‘Admin | Firmware’ page.
•
The latest firmware files have been downloaded or otherwise received from
Comtech EF Data and are available on the user PC in an accessible temporary
folder.
1. Use Command-line to send a “PING” command to confirm proper connection and
communication between the user PC and the CDM-840:
•
If the Management IP Address of the unit is still not known, type “info” at the Serial
Interface CDM-840> command prompt and record the displayed information.
Alternately, use Serial Remote Control or the Web Server Interface:
o
Serial Remote Control – Type the “<0/IPA?” remote query (without quotes) at the
Serial Interface CDM-840> command prompt. The unit returns the configured
Management IP Address:
>0000/IPA=192.168.1.12/24 (default)
o
Web Server Interface – View the IP
Address/CIDR Mask entry on the
‘Configuration | Interface | FE Mgt’ page:
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Updating Firmware
•
Revision 2
MN-CDM840
Once the Management IP Address is known – use Command-line to PING: Type “ping
xxx.xxx.xxx.xxx” at the Command-line prompt (where ‘xxx.xxx.xxx.xxx’ denotes the unit
Management IP Address).
The response should confirm whether or not the unit is properly connected and
communicating.
2. Use Command-line to transfer (FTP) the files from the user PC to the CDM-840:
•
Type "ftp xxx.xxx.xxx.xxx" (where ‘xxx.xxx.xxx.xxx’ denotes the unit Management IP
Address).
•
Enter the username and password assigned to the unit. The default username and
password is “comtech”.
•
Type “bin” to set the binary transfer mode.
•
Type "put FW-0000408x_CDM840.bin" (where ‘x’ denotes the revision letter) at the
Command-line prompt, without quotes, to begin the file transfer. The process
sequences through several blocks – this may take several minutes for the transfer to
occur. Once the upgrade file is transferred, the image is written to Flash memory and
the unit transmits the message “UPLOAD COMPLETE.”
In the event you receive the “Connection closed by remote host.” message,
wait another minute before continuing. The CDM-840 update sometimes
takes longer than the FTP client allows.
•
Type "bye" to terminate the FTP session, and then close the Command-line window.
3. Use the Serial Interface or the CDM-840 Web Server Interface ‘Admin | Firmware’ page to
verify that the PC-to-Unit FTP file transfer was successful.
4. Use the CDM-840 Web Server Interface to select the firmware and reboot the unit:
A. Select the desired Boot Slot (Image):
•
Go to the CDM-840 Web Server Interface ‘Admin | Firmware’ page.
•
Use the ‘Boot From:’ drop-down menu to select
Latest, Slot 1, or Slot 2 (in the Firmware
Configuration section).
By default, the unit will boot from the Slot that stores the firmware version having
the latest date (Boot From: Latest). ‘Boot From:’ may also be set to force the unit to
boot up using either firmware image loaded in Slot #1 or Slot #2.
•
Click [Submit] to save the setting.
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B. Reboot the CDM-840:
•
Go to either the CDM-840 Web Server Interface ‘Admin | Firmware’ page or the
‘Utility | Reboot’ page.
•
Click [Reboot] (in the System Reboot section)
and [OK] when prompted, and then wait while
the CDM-840 reboots.
The CDM-840 is now operating with its latest firmware. The firmware update process is now
complete.
4–10
Chapter 5. FAST ACTIVATION
PROCEDURE
5.1
Introduction
The CDM-840 Remote Router incorporates a number of optional features. In order to permit a
lower initial cost, you may purchase the unit with only the desired features enabled.
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 contact Comtech EF Data Product Support to
purchase these unique, register-specific Fast Access Codes, and then load these codes into the
unit using the Web Server Interface (accessible by connecting your PC Ethernet port to the
CDM-840 rear panel ‘ETHERNET | MANAGEMENT | FE’ port).
FAST System Theory: FAST facilitates on-site 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 is possible
because of FAST’s extensive use of the programmable logic devices incorporated into Comtech
EF Data products.
FAST Implementation: Comtech EF Data implements the FAST system in the modem at the
foactory. 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 Web Server (HTTP) Interface.
FAST Accessible Options: You may order hardware options for installation either at the factory,
or you can install and activate them on-site. The FAST Access Code that you purchase from
Comtech EF Data enables configuration of the availavble hardware.
5–1
CDM-840 Remote Router
FAST Activation Procedure
5.2
Revision 2
MN-CDM840
FAST Activation via the Web Server Interface
See Sect. 6.4.4.2.3 Admin | FAST for the complete information on activating FAST
Features via the CDM-840 Web Server Interface.
Use the Web Server Interface ‘Admin | FAST’ page to manage CDM-840 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.
Figure 5-1. CDM-840 Web Server (HTTP) Interface – ‘ADMIN | FAST’ page
5–2
CDM-840 Remote Router
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MN-CDM840
5.2.1 FAST Configuration
The read-only table in this section displays the CDM-840 available FAST Features and the
operational status for each option:
Column
Description
Option
This column lists each available FAST Feature.
Status
This column identifies each F AST F eature operational parameter(s). If an opt ion is not enabled,
the column displays this information.
The complete roster of FAST Accessible Options is as follows:
Option
16 kbps – 256 kbps Tx Data/Symbol Rate
16 kbps – 512 kbps Tx Data/Symbol Rate
16 kbps – 1024 kbps Tx Data/Symbol Rate
CCM (VersaFEC only)
16 kbps – 2.048 Mbps Tx Data/Symbol Rate
16 kbps – 5 Mbps Tx Data/Symbol Rate
16 kbps – 10 Mbps Tx Data/Symbol Rate
16 kbps – 15.35 Mbps Tx Data/Symbol Rate
1 – 15 Mbps Rx Data/Symbol Rate
CCM (DVB-S2 only)
1 – 45 Mbps Rx Data/Symbol Rate
1 – 100 Mbps Rx Data/Symbol Rate
E1 Interface
Full Support E1 (hardware upgrade also required)
G.703 Clock Extension
dSCPC (Dynamic Single Carrier per Channel)
Precision Time Protocol (PTP) – NOT AVAILABLE IN THIS FIRMWARE RELEASE
1. Tx Header and Payload Compression and Quality of Service (QoS)/Advanced
QoS are standard (non-FAST) operational features for Comtech EF Data’s
Advanced VSAT Series group of products. If these features are listed in the
FAST Configuration table, they are always indicated as Enabled.
2. PTP is not available in this firmware release. Once operable, this protocol will
be used to synchronize clocks throughout a computer network. When the
hardware required for this option is not installed in the CDM-840, the Web
page displays the message “PTP not supported with installed hardware”.
3. E1 Interface operation is not available with the CDM-840 Reduced Form
Factor Outdoor Remote Router
5–3
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5.2.2 FAST Upgrade
To perform the CDM-840 FAST option upgrade, follow these steps:
Step
Task
1
Use the FAST Configuration table to view the currently installed features. Any options
that appear as Disabled in the table’s Status column may be purchased as a FAST
upgrade.
2
The serial number of the CDM-800 is required by
Comtech EF Data when ordering FAST option
upgrades.
Take note of this number, provided here in the FAST Upgrade section, before
contacting Comtech EF Data:
Serial Number: __________________________
3
Contact Comtech EF Data Product Support:
•
Provide the CDM-840 Serial Number to the representative.
•
Identify and purchase the desired FAST option(s).
•
Obtain the invoice, the 20-digit FAST Access Code, and the FAST option
activation instructions.
4
Carefully enter the FAST Access Code into the
FAST Code register text box.
5
Click [Submit] to execute the FAST Upgrade.
6
The unit either accepts or rejects the code, and the FAST Configuration table
refreshes to reflect any upgrades in operation.
5–4
Chapter 6. ETHERNET-BASED
REMOTE PRODUCT
MANAGEMENT
6.1
Introduction
Ethernet-based Remote Product Management is available through the CDM-840 rear panel
‘MANAGEMENT | FE’ RJ-45 10/100 BaseT Fast Ethernet M&C port.
1. TO PROCEED WITH ETHERNET-BASED REMOTE PRODUCT MANAGEMENT
(SNMP OR WEB SERVER), ASSUMPTIONS ARE MADE THAT:
•
The CDM-840 is operating with the latest version firmware files.
•
The CDM-840 is connected to a user-supplied, Windows-based PC, and:
•
o
The PC serial port is connected to the CDM-840 ‘CONSOLE’ port with a
user-supplied 9-pin serial cable.
o
The PC Ethernet port is connected to the CDM-840 rear panel
‘MANAGEMENT | FE’ 10/100 BaseT Ethernet port with a user-supplied
hub, switch, or direct Ethernet cable connection.
o
The user PC is running a terminal emulation program (for operation of
the CDM-840 Serial Interface) and a compatible Web browser (for
operation of the CDM-840 Web Server Interface).
The CDM-840 Management IP Address has been noted using the CDM-840
Serial Interface.
2. USE OF THE ETHERNET-BASED SNMP INTERFACE IS RECOMMENDED ONLY FOR
ADVANCED USERS. ALL OTHER USERS ARE STRONGLY ENCOURAGED TO USE
THE CDM-840 WEB SERVER INTERFACE FOR MONITOR AND CONTROL (M&C)
OF THE CDM-840.
6–1
CDM-840 Remote Router
Ethernet-based Remote Product Management
6.2
Revision 2
MN-CDM840
Ethernet Management Interface Protocols
The user PC facilitates access to Ethernet-based remote monitor and control (M&C) of the
CDM-840 through two separately-operated protocols:
•
Simple Network Management Protocol (SNMP). This non-secure interface requires a usersupplied Network Management System (NMS) and a user-supplied Management Information
Base (MIB) File Browser.
•
The CDM-840 Web Server (HTTP) Interface. This non-secure interface requires a compatible
user-supplied Web browser such as Internet Explorer.
6.2.1 Ethernet Management Interface Access
Access to the CDM-840 Ethernet Management Interface requires you to specify the unit
Management IP Address. This address may be obtained from the CDM-840 Serial Interface,
upon power-up of the unit, via use of a terminal emulator connected with a user-supplied
adapter cable to the 19-pin serial ‘CONSOLE/ REDUNDANCY’ port. As shown, a number of
operational parameters (including the unit factory-default IP addresses) are displayed.
The default (factory-assigned) IP addresses are provided in the table that follows (if otherwise
assigned, you may use the last column to write down the IP addresses for future reference):
Description
Default Address
Management IP Address
Traffic | GE (GigE) IP Address
User-assigned Address
192.168.1.12
____________________________
10.10.3.12
____________________________
See Chapter 7. SERIAL-BASED REMOTE PRODUCT MANAGEMENT for details on
setting up and using the CDM-840 Serial Interface.
6–2
CDM-840 Remote Router
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6.3
Revision 2
MN-CDM840
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-840 Outdoor Remote Router.
•
The SNMP Agent. The software that runs on the CDM-840. The CDM-840 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-840:
MIB File/Name
(where ‘x’ is revision letter)
ComtechEFData.mib
ComtechEFData Root MIB file
FW-0000407x_CDM840.mib
CDM-840 MIB file
Description
ComtechEFData M IB f ile gi ves t he r oot t ree f or ALL C omtech E F 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
MIB file consists of all of the OIDs for CDM-840 M&C
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-840 uses Community Strings as a password scheme that provides authentication
before gaining access to the CDM-840 Agent 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.
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Two Community Strings are defined for SNMP access:
•
Read Community
default = public
•
Write Community
default = private
For proper SNMP operation, the CDM-840 MIB files must be used with the
associated version of the CDM-840 Outdoor Remote Router M&C. Refer to the CDM840 FW Release Notes for information on the required FW/SW compatibility.
6.4
Web Server (HTTP) Interface
A user-supplied Web browser allows the full monitoring and control (M&C) of the CDM-840
from its Web Server Interface. This non-secure embedded Web application is designed for, and
works best with, Microsoft Internet Explorer Version 7.0 or higher.
6.4.1 User Login
Type the CDM-840 Management IP Address (shown here as http://xxx.xxx.xxx.xxx) into the
Address area of the user PC Web browser:
The login page, similar to the example
shown here, opens. Enter the assigned
User Name and Password – the default for
both is comtech. Click [Log On].
If the User Name and Password are
accepted: The CDM-840 Web Server
Interface Home page, similar to the
example shown here, appears:
6–4
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MN-CDM840
6.4.2 Web Server Interface – Operational Features
6.4.2.1
Virtual Front Panel
The CDM-840 Web Server Interface features a read-only ‘Virtual Front Panel’ (VFP) at the top of
each page (Figure 6-1). The interface appearance differs based on the selected viewing mode –
default or Enhanced Mode.
(TOP) Virtual Front Panel in default mode
(BOTTOM) Virtual Front Panel in Enhanced Mode
Figure 6-1. CDM-840 Outdoor Remote Router Virtual Front Panel
The default viewing mode features a text-based VFP, and hyperlinks for Web page access.
Click the Enhanced Mode check box to change the interface appearance to the GUI viewing
format. The Enhanced Mode features virtual LEDs and navigation tabs for Web page access.
For either mode, the VFP provides the following information:
•
At left – The VFP reports the status of the unit. In either viewing mode, the VFP updates
the unit operation indicators in real time. In Enhanced Mode, the VFP emulates the
CDM-840 front panel LEDs (explained in detail on the next page).
•
At right – The VFP displays (and updates in real time) the following parameters:
o
o
Working Mode (Router or BPM)
Rx MODCOD
o EsNo (dB)
o
o
Firmware Version o
BER
o
Rx Status
RSL (dBm)
To ensure that your web browser correctly displays the VFP features, Comtech EF Data
recommends that you follow these configuration steps (this example uses Microsoft Internet
Explorer):
6–5
CDM-840 Remote Router
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Step
Revision 2
MN-CDM840
Task
1
On the Tools menu, click Internet Options.
2
On the General tabbed page:
Under Browsing history, click [Settings].
3
On the Temporary Internet Files and History Settings page:
Under Check for Newer Versions of Stored Pages:, click Every Time I visit the webpage.
4
Click [OK] to save the selection and close the Temporary Internet Files and History Settings page.
5
Click [OK] to close the Internet Options page.
6
Restart your browser.
The Enhanced Mode virtual LEDs indicate the active operating state of the unit as follows:
LED
Condition
Green
Amber
Red
No Unit Faults or Alarms.
No Unit Faults, but an Alarm exists.
A Unit Fault exists (Example: PSU fault).
There is a Stored Event in the log, which can be viewed from the Web Server
Amber
Interface
STORED EVENT
Off
There are no Stored Events.
Green
The Unit is On Line, and carrying traffic.
ONLINE
The Unit is Off Line (standby) – forced by externally connected 1:1 or 1:N
Off
redundancy system.
Amber
A Test Mode is selected
TEST MODE
Off
There is no Test Mode currently selected.
Green
The Transmitter Carrier is On.
TRANSMITTER
Red
A Fault exists that causes the unit to turn off the carrier.
ON
Off
The Transmitter Carrier is Off.
Green (solid)
No Tx Traffic Faults, no packets.
No Tx Traffic Faults, blinks when a packet is being transmitted to the satellite link
Green (blinking)
from this unit.
Tx TRAFFIC
Amber
A Tx Traffic Alarm exists.
Red
Tx Traffic has a Fault.
Off
A Tx Traffic Fault exists.
Green (solid)
No Rx Traffic Faults (demod and decoder are locked, everything is OK).
No Rx Traffic Faults, blinks when a packet is being received from the satellite link
Green (blinking)
to this unit.
Rx TRAFFIC
Amber
Rx Traffic has an Alarm.
Red
Rx Traffic has a Fault.
Off
An Rx Traffic fault exists (the demod may still be OK).
Green (solid)
Traffic Ethernet is connected, but no traffic exists.
GE
Green (blinking) Ethernet activity detected.
LINK/ACTIVITY
Off
Traffic Ethernet is not connected.
UNIT STATUS
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6.4.2.2
Revision 2
MN-CDM840
Navigation
The CDM-840 Web Server Interface provides navigation aids at the top of each page, just below
the Virtual Front Panel:
•
In default mode, hyperlinks are provided. After you click a
navigation hyperlink, you may click an available primary
page hyperlink. In turn, any nested hyperlinks appear for
further selection.
•
In Enhanced Mode, navigation tabs are provided. 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 Web pages to indicate the depth of navigation needed
to view the subject page: “Top Level Select | Primary Page Select | Nested Page Select”.
For example, “Status | Statistics | Traffic” instructs you to “first click the top-level ‘Status’
navigation tab; then, click the ‘Statistics’ primary page tab; finally, click the nested ‘Traffic’ tab.”
6.4.2.3
Page Sections
Each page features one or more sections. The title at the top of
each page or page section indicates its function. Each section can
feature editable fields, action buttons, and read-only displays that
are specific to that function.
This manual explains the purpose and operation for each Web page on a per-page, per-section
basis.
6.4.2.4
Action Buttons
Action buttons are important in the Web Server Interface. Click an action
button to do one of these tasks:
•
Reset changed parameters to remove unsaved changes.
•
Permanently save changes.
•
Refresh the page with current data.
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.
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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, left-click on an item to select that
choice.
6.4.2.6
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.
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6.4.3 Web Server Interface – Menu Tree
1. Any diagram block that is marked with (*) denotes a page that is functional
only when that particular FAST feature has been purchased and activated.
Diagram blocks marked with (**) denote pages that are functional only when a
VIPERSAT MANAGEMENT SYSTEM (VMS), and a Block Upconverter (BUC) OR a
Low Noise Block Downconverter (LNB) is installed and is recognized as
operational.
2. E1 Interface operation is not available with the CDM-840 Reduced Form Factor
Outdoor Remote Router.
The CDM-840 Web Server Interface features five navigation tabs (shown in blue) located below
the VFD at the top of each page. Primary page tabs (green) and nested page tabs (yellow and
gray) provide access to individual Web pages. Click any navigation tab to continue.
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6.4.4 Web Server Interface Page Descriptions
1. Access to and availability of certain CDM-840 Web Server Interface pages is
dependent upon the FAST options purchased for operation as well as the
detected presence of auxiliary products (e.g., VMS, Redundancy Switches,
LNBs or BUCs, etc.) installed and configured for use with the CDM-840. Such
operational restrictions are noted through the remainder of this chapter.
2. The page figures that follow depict the Web Server Interface pages with
Enhanced Mode selected.
6.4.4.1
Home Pages
Click the Home tab, and then select the Home or Contact tab to continue.
6.4.4.1.1
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 6-2. CDM-840 Outdoor Remote Router Home Page
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Home | Contact
For all product support, please call:
+1.240.243.1880
+1.866.472.3963 (toll free USA)
6.4.4.2
Admin (Administration) Pages
Use these pages to set up user access, manage the firmware load preferences, and activate FAST
features.
Click the Admin tab, and then select the Access, SNMP, FAST, Firmware, Auto Logout, or VMS
tab to continue.
6.4.4.2.1
Admin | Access
The Administrator must use this page to manage the CDM-840 Web Server Interface user access
settings.
Figure 6-3. Admin | Access Page
User Access
•
Enter a User Name. The User Name can be any alphanumeric combination with a maximum
length of 15 characters. The factory default is comtech.
•
Enter a Password. The Password can be any alphanumeric combination with a maximum
length of 15 characters. The factory default is comtech.
•
Re-enter the new Password in the Confirm Password text box.
Click [Submit] to save.
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Admin | SNMP
Sect. 6.3 SNMP Interface
The Administrator must use this page to manage the CDM-840 SNMP (Simple Network
Management Protocol) settings.
Figure 6-4. Admin | SNMP Page
SNMP Configuration
•
Enter the SNMP Trap Destination IP Address, in the form XXX.XXX.XXX.XXX, of the computer
that is to receive the traps generated by the CDM-840.
Click [Submit] to save.
•
Enter an SNMP Read Community string. The SNMP Read Community string can be any
combination of characters and a length from 4 to 15 characters. The factory default SNMP
Read Community string is public.
Click [Submit] to save.
•
Enter an SNMP Write Community string. The SNMP Write Community string can be any
combination of characters and a length from 4 to 15 characters. The factory default SNMP
Write Community string is private.
Click [Submit] to save.
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Admin | FAST
See Chapter 5. FAST ACTIVATION PROCEDURE for complete details and
instructions for upgrading the CDM-840 Remote Router FAST features.
1. Tx Header and Payload Compression and Quality of Service (QoS)/Advanced
QoS are standard (non-FAST) operational features for Comtech EF Data’s
Advanced VSAT Series group of products. If these features are listed in the
FAST Configuration table, they are always indicated as Enabled.
2. PTP is not available in this firmware release. Once operable, this protocol will
be used to synchronize clocks throughout a computer network. When the
hardware required for this option is not installed in the CDM-840, the Web
page displays the message “PTP not supported with installed hardware”.
3. E1 Interface operation is not available with the CDM-840 Reduced Form Factor
Outdoor Remote Router
The CDM-840 has a number of optional features that may be activated after purchase of the
unit. Fully Accessible System Topology (FAST) Access Codes are unique authorization codes that
may be purchased from Comtech EF Data during normal business hours, and then loaded into
the unit using this page.
Figure 6-5. Admin | FAST Page
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Admin | Firmware
Chapter 4. UPDATING FIRMWARE
Use this page to select which image (boot Slot #) is to be designated as the active running
firmware image – i.e., the version loaded for operation upon power-up or soft reboot.
Figure 6-6. Admin | Firmware Page
Slot Information
This read-only status section displays operating status for the firmware versions loaded into Slot
#1 and Slot #2.
Firmware Configuration
Use the Boot From: drop-down list to select Latest, Slot 1, or Slot 2. The default selection is
Latest, in which the unit will automatically select the image that contains the most current
firmware.
Click [Submit] to execute the desired firmware boot preference.
(Note that the Slot Information section, which in the above example displays Slot #1 as the
designated active running firmware image, will not update until after the unit is rebooted.)
System Reboot
Click [Reboot] to reboot the CDM-840. Once the unit reboots, you must log in once again to
resume use of the Web Server Interface. See the Utility | Reboot page (Sect. 6.4.4.7.2) for
complete details about the reboot process.
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Admin | Auto Logout
Use this page to incorporate the Auto Logout security measure.
Figure 6-7. Admin | Auto Logout Page
Auto Logout Configuration
Set an automatic logout time to safeguard access to an already logged-in unit:
•
Enter a value from 1 to 15 minutes into the Logout Time box to configure this feature.
•
Enter a value of 0 to disable this feature.
Click [Submit] to save the desired configuration.
With Auto Logout configured, the active session terminates if the unit remains idle (i.e., when
no user activity occurs) beyond the assigned Logout Time. A valid user name and password is
then required to resume the CDM-840 Web Server Interface session.
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Admin | VMS
VMS v3.x.x VIPERSAT Management System User Guide (CEFD P/N MN/22156)
Figure 6-8. Admin | VMS Page
Vipersat Management System Configuration
The acceptable/valid operating ranges for items in this section are provided in parentheses.
•
Network ID (1-254) – The Network ID designation defines to which network the CDM-840
belongs. All devices in a common network will have the same network ID. The network ID is
used by the VMS to identify Vipersat units within a network and allows the VMS to manage
multiple networks, each with its own unique network ID number.
•
Management Base Port – The Management Base Port sets the starting IP port addressing
for all VM, ACM, and CDRP messages.
•
Use this setting ONLY if network port addressing is in contention.
Otherwise, leave this setting at default (hex) C000 (des) 49152 to avoid
unnecessary configuration changes.
•
Changing this port number will affect internal management operations
across the entire network, requiring configuration changes to all modems.
•
While this page is functional only when the optional VIPERSAT
MANAGEMENT SYSTEM (VMS) is installed and operational, the
Management Base Port number is essential to proper operations with or
without the VMS feature.
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Management Multicast IP Port – The Multicast Address is the NMS Multicast IP address
assigned to all CDM-840s in the Vipersat network that are managed by the VMS. This
address must match the VMS Transmit Multicast Address.
Typical for each item, click [Submit] to save.
Once the modem is registered in the Vipersat network, the VMS takes full management control
of the Data Rate, Symbol Rate, FEC Type, Tx Frequency, MODCOD, Power Level, and Carrier State
modulator parameters. Click [Take control of 840 from VMS] to override the VMS control
function.
Vipersat Management System Status
This read-only section provides available information on the VMS IP Address, Registration
Status, and Version.
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Configuration Pages
1. The BUC and LNB tabs are functional ONLY when those optional products are
installed.
2. Precision Time Protocol is not available in this firmware release. The PTP tab,
while available and selectable on this interface, is therefore non-functional.
Use the nested Configuration pages to configure all unit parameters. Dependent on availability,
first click the Configuration tab, and then select the Interface, WAN, Network, ECM, or dSCPC
tab to continue.
6.4.4.5.1
Configuration | Interface Pages
Click the Configuration | Interface tabs, and then select the FE-Mgt, GE, or E1 tab to continue.
6.4.4.5.1.1
Configuration | Interface | FE-Mgt
1. The IP Addresses for the FE and GigE Interfaces must be different and on
separate subnets.
2. The FE Management port will always be in Router Mode. The Traffic Port will
change from Router Mode to BPM Mode when the Working Mode is changed.
Use this page to configure the rear panel ‘MANAGEMENT | FE’ (10/100 BaseT Fast Ethernet)
M&C port. Note that this port serves as the dedicated Ethernet-based monitor and control
interface between the CDM-840 and the user PC.
Figure 6-9. Configuration | Interface | FE-Mgt Page
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FE – Management Interface
The acceptable/valid operating ranges for items in this section are provided in parentheses.
•
MAC Address (read-only) – The Ethernet MAC Addresses are configured at the factory and
cannot be changed. This address is unique for each available port.
•
IP Address / CIDR Mask (8 to 30) – Use this box to enter the IP Address and CIDR (Classless
Inter-Domain Routing) Subnet Mask.
When in Router Mode, the configured subnets must be unique. Overlapping
the subnets will not be allowed and the requested configuration will be
rejected.
•
Link Configuration – Use the drop-down list to select the line speed and duplex setting for
the CDM-840 FE interface. The available selections are:
o Auto*
o 100 BaseT / Half Duplex
o 100 BaseT / Full Duplex
o 10 BaseT / Half Duplex
o 10 BaseT / Full Duplex
* Auto is the recommended configuration selection.
•
Negotiated Link Mode (read-only) – The actual negotiated line speed and duplex setting for
the FE Interface is displayed here. The viewable settings are:
o
o
10 BaseT / Full Duplex
10 BaseT / Half Duplex
o
o
100 BaseT / Full Duplex
100 BaseT / Half Duplex
Click [Submit] to save.
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Configuration | Interface | GE
1. The IP Addresses for the FE and GigE Interfaces must be different and on
separate subnets.
2. The GE port will not have an IP address when BPM Working Mode is active.
Use this page to configure the rear panel ‘GE’ 10/100/1000 BaseT Gigabit Ethernet port. This
port should be connected to the user LAN network, and is used for user Ethernet traffic.
Figure 6-10. Configuration | Interface | GE page
GE Interface
The read-only information and configuration options provided here are identical to those
featured on the ‘Configuration | Interface | FE Mgt’ page. See Sect. 6.4.4.5.1.1 for information
about using these features.
VLAN Configuration
Appendix C. BRIDGE POINT-TO-MULTIPOINT (BPM) OPERATION
VLAN Port Mode – This setting applies only when the Working Mode is set to BPM. Use the
drop-down list to select the port mode as Trunk or Access. Note the following:
•
VLAN Trunk Mode is the default mode for BPM where all packets (with and without
VLAN tags) arriving at the CTOG-250 and CDM-840 pass through the system without
modification. A trunked port can pass two or more VLANs on the interface.
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VLAN Access Mode forces the Traffic Interface to carry traffic for only one userconfigured VLAN.
Access Port VLAN ID – Enter a valid numeric port ID, from 1 to 4095. This ID is valid only when
Working Mode is set as BPM and the VLAN Port Mode is set to Access.
When the VLAN Port Mode is set to Access, VLAN tagged packets from WAN to LAN having a
VLAN ID that matches the “Access Port VLAN ID” will have the outer VLAN tag removed and then
transmitted by the Traffic port. In this mode, packets coming in to the Traffic port in this mode
will be tagged with the “Access Port VLAN ID”. If the outermost VLAN tag IDs for WAN to LAN
packets do not match the “Access Port VLAN ID”, they will be dropped.
Click the (Link to Working Mode Configuration Page) hyperlink to access the Configuration |
Network | Working Mode page (Sect. 6.4.4.5.3.3).
Click [Submit] to save.
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Configuration | Interface | E1 Pages
Appendix G. WAN/RAN OPTIMIZATION
These pages are functional only when the ‘G.703 E1 Interface / RAN Optimization’
FAST and hardware options are installed and activated.
Click the Configuration | Interface | E1 tabs, and then select the Configuration or Time Slots
tab to continue.
6.4.4.5.1.3.1 Configuration | Interface | E1 | Configuration
Figure 6-11. Configuration | Interface | E1 | Configuration Page
E1 Configuration
•
Line Type – Use the drop-down list to select this parameter as Framed, Framed-CRC, or
Unframed.
•
Line Coding – Use the drop-down list to select this parameter as HDB3 or AMI.
•
WAN Loopback and Terrestrial Loopback – Use the drop-down lists to set these parameters
as either Disable or Enable.
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Click [Submit] to save any changes made to the E1 Configuration settings.
RAN Optimization
Appendix G. WAN/RAN OPTIMIZATION
Use RAN Optimization to reduce the satellite bandwidth required for mobile backhaul. Use this
section to select the level of optimization needed to achieve the desired link quality and
bandwidth savings.
•
Hub RAN Optimizer IP Address – Enter an IP address in the form XXX.XXX.XXX.XXX.
•
Hub RAN Optimization E1 Port ID – Enter a numeric identification string for the ‘G.703 | IN
/ OUT’ port pair, corresponding to a specified, corresponding port on the CXU-810 RAN
Optimizer.
•
Optimization Level – Use the drop-down list to set this parameter as Best Performance or
Best Compression.
•
Jitter Buffer Latency – Use the drop-down list to set this parameter as 10ms, 20ms, 30ms,
40ms, or 50ms.
•
Alarm Relay – Use the drop-down list to select as Disable or Enable. Selecting Enable will
both trigger the logging of operational faults or alarms on the Status | Statistics | E1 |
Transmit / Receive pages and toggles on the STORED EVENT LED on the Web Server
Interface Virtual Front Panel (Sect. 6.4.2.1).
Click [Submit] to save any changes made to the RAN Optimization settings.
E1 Port
By default, access to G.703 Clock Extension operation defaults to Enabled when this FAST option
is activated. Use the E1 Port drop-down list to otherwise elect Disable.
Click [Submit] to save.
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6.4.4.5.1.3.2 Configuration | Interface | E1 | Time Slots
Figure 6-12. Configuration | Interface | E1 | Time Slots Page
Time Slot Configuration
Time Slots may be selected for transmission or reception up to the maximum dictated by the
selected transmit or receive data rate, and may be selected in prioritized order. For example, if
the Time Slot format is set to Mostly 64k TCHs (Time Channels), the maximum number of Time
Slots that can be dropped or inserted is 64 kbps. From left to right:
Column
Description
Slot
(Read-only) This column identifies the assignable Time Slot (0 through 31).
Selection On / Off
Select this Time Slot as On or Off.
Priority
Use t he dr op-down l ist t o s elect t his T ime S lot pr iority as Priority 1, Priority 2, o r
Priority 3.
Format
Use the drop-down list to select this Time Slot format:
•
Mostly 8k TCHs
•
Mostly 16k TCHs
•
Mostly 32k TCHs
•
Mostly 64k TCHs
Click [Submit] to save.
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Configuration | WAN Pages
The BUC and LNB tabs are functional ONLY when those optional products are
installed.
Click the Configuration | WAN tabs, and then select the Demod, Mod, QoS, Label,
Compression, BUC, or LNB tab to continue.
6.4.4.5.2.1
Configuration | WAN | Demod (Demodulator) Pages
Click the Configuration | WAN | Demod tabs, and then select the Config or ACM tab to
continue.
6.4.4.5.2.1.1 Configuration | WAN | Demod | Config
Use this page to configure CDM-840 Rx demodulator operations.
Figure 6-13. Configuration | WAN | Demod | Config Page
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Demodulator
The upper range of Symbol Rate selection requires activation of the RECEIVE
SYMBOL RATE FAST option.
The acceptable/valid operating range for each item in this section is provided in parentheses.
•
Data Rate (read-only) – This section displays the data rate, which is a snap shot of the
MODCOD currently being received.
•
Symbol Rate (1000 to 62000) – Enter the Active and Alternate symbol rates in ksps.
Click [Submit] to save.
The Alternate column and its defined Symbol and Data rates are used only when
the Automatic Demod Configuration Switch has been enabled.
•
Rx Frequency (950 to 2150 MHz) – Enter the Active and Alternate Rx frequencies in MHz.
•
MODCOD – Use the drop-down lists to select the FEC rate (MODCOD). The available selections
are:
o Auto*
o DVB-S2 QPSK 8/9
o DVB-S2 16-APSK 4/5
o DVB-S2 QPSK 1/4
o DVB-S2 QPSK 9/10
o DVB-S2 16-APSK 5/6
o DVB-S2 QPSK 1/3
o DVB-S2 8-PSK 3/5
o DVB-S2 16-APSK 8/9
o DVB-S2 QPSK 2/5
o DVB-S2 8-PSK 2/3
o DVB-S2 16-APSK 9/10
o DVB-S2 QPSK 1/2
o DVB-S2 8-PSK 3/4
o DVB-S2 32-APSK 3/4
o DVB-S2 QPSK 3/5
o DVB-S2 8-PSK 5/6
o DVB-S2 32-APSK 4/5
o DVB-S2 QPSK 2/3
o DVB-S2 8-PSK 8/9
o DVB-S2 32-APSK 5/6
o DVB-S2 QPSK 3/4
o DVB-S2 8-PSK 9/10
o DVB-S2 32-APSK 8/9
o DVB-S2 QPSK 4/5
o DVB-S2 16-APSK 2/3
o DVB-S2 32-APSK 9/10
o DVB-S2 QPSK 5/6
o DVB-S2 16-APSK 3/4
* Auto is the recommended configuration selection.
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•
Gold Code (000000 to 262141) – The Gold-n Index descrambling code indicates the Physical
Layer spreading sequence number. The default setting is all 0s.
•
Es/No Alarm Point (0.1 to 16.0) –This value, as calculated by the demodulator, is the energy
per symbol bit (Es) divided by the noise spectral density (No). Enter the Es/No Alarm Point
value, in dB.
Click [Submit] to save.
The Alternate column and its defined Symbol and Data rates are used only when
the Automatic Demod Configuration Switch has been enabled.
•
Roll Off (read-only) – The Rx Alpha Rolloff (α) dictates how fast the spectral edges of the
carrier are attenuated beyond the 3 dB bandwidth. Roll Off is identified here as 20%, 25%, or
35%.
•
Frame (read-only) – The Framing type is identified here as either Normal or Auto.
•
Pilots (read-only) – Pilots operation is identified here as Off, On, or Auto.
•
Spectrum Invert (read-only) – Spectrum Inversion operation is identified here as either
Normal or Rx Spectrum Inverted.
Automatic Demod Configuration Switch
The Automatic Demod Configuration Switch allows the user to enable and configure the
“Alternate Demod” functionality. The primary purpose of this functionality is allow a user to prestage a new configuration for the outbound carrier – i.e., increase, decrease, or move the
CTOG-250’s Outbound carrier. It is expected that this will be done as part of normal operations.
The recommended procedure is as follows:
Step
Task
1
Define the new desired outbound carrier parameters (symbol rate, frequency).
2
Configure t he “ Alternate Demod” c onfiguration f or al l C DM-840s on t he s ame O utbound C arrier ( CTOG250).
3
Configure the CTOG-250 to the new matching Tx parameters.
4
At this point, all of the CDM-840s will unlock from the old carrier, wait the “Intitial Switch Timer” seconds and
then try to Receive Lock to the “Alternate Demod” configuration.
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Task
5
If the initial attempt fails, then the demod will switch back and forth between the Active and t he Alternate
configuration until lock is achieved. This will occur every “Search Switch Timer” seconds.
6
Once a l ock oc curs, t he s uccessful c onfiguration bec omes t he “ Active” c onfiguration and t he ot her
configuration becomes the “Alternate” configuration.
•
Switch Enable – Use the drop-down list to set automatic switching between demod
configurations as Enable or Disable.
•
Initial Switch Timer – Enter a value from 10 to 3600 seconds. Use this setting to specify how
long to wait after the demod goes unlocked before trying to lock onto the “Alternate
Demod” parameters.
•
Search Switch Timers – Enter a value from 30 to 3600 seconds. Use this setting to specify
how long to wait between alternating attempts to “search” for the correct demod
configuration. The “search” will stop once the demod has successfully locked onto the
CTOG-250’s carrier.
Click [Submit] to save.
Receive WAN Labels
Edit the Label 1 through Label 4 text boxes to suit. Each label has a valid range of 1 to 2047.
The assigned Receive WAN Labels must match the WAN Labels assigned on the
CTOG-250 Route Table. Note that the preferred method of operation (as required
for ACM/VCM Operation) is to configure a unique WAN Label in Entry #1 for each
CDM-840 across the network, and then enble CDRP on the CTOG-250. The
associated Route to WAN Label will be automatically updated and maintained.
Refer to the CTOG-250 Comtech Traffic Optimization Gateway Installation and
Operation Manual (CEFD P/N MN-CTOG250) for the CDM-800 configuration
information.
Create the desired labels. Click [Submit] to save.
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Demodulator Frequency
The Demodulator Frequency Calculator provided here allows you to start from either the Rx RF
or Rx L-Band/IF Frequency and calculate the “other” frequency. If the LNB LO Mix, LNB LO
Frequency, and one of the desired frequencies are known, then the other can be calculated. This
calculator is intended to remove any guesswork associated with the demodulator’s L-Band/IF
Frequency to the terminal’s RF frequency (or vice versa).
The acceptable/valid operating range for each item in this section is provided in parentheses.
•
Rx RF Frequency (0 to 67080 MHz) – This is the frequency at which the terminal is receiving
from the satellite. Upon configuring this to a non-zero value, as well as entering in the LNB
LO Mix and Frequency, the demod’s L-Band or IF frequency will be automatically configured.
Enter the Rx RF Frequency in MHz, and then click [Submit]. Upon submission, if the LNB LO
Frequency has been entered, the resulting Rx RF Frequency will be displayed.
If the LNB LO Frequency is left at the default configuration of zero, the Rx RF Frequency will
not be calculated.
The LNB LO Mix and LNB LO Frequency entries are provided for calculation
purposes only. LNB configuration is not updated as a result of configuring these
parameters.
•
LNB LO Mix – Use this drop-down list to select the LNB LO (Low Oscillator) Mix as Upconv
(SUM): RF=LO+LBand or DownConv (Diff): RF=LO-LBand.
Please consult the LNB adjunct product datasheet or its Installation and
Operation Manual for the type of LNB (Upconverter [Sum] or Downconverter
[Diff]) being used.
•
LNB LO Frequency – Enter the known LNB Rx LO (Low Oscillator) Frequency in MHz.
Please consult the LNB adjunct product datasheet or its Installation and
Operation Manual for the LO Frequency.
•
Rx L-Band Frequency (950 to 2150 MHz for L-Band, 50 to 180 MHz for IF) – Enter the L-Band
or IF-Band frequency in MHz, and then click [Submit].
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6.4.4.5.2.1.2 Configuration | WAN | Demod | ACM (Adaptive Coding and
Modulation)
VersaFEC ACM requires Version 1.3.2 (or higher) firmware, and the appropriate
FAST code for the maximum operating symbol rate.
Use this page to configure CDM-840 Rx ACM operations.
Outbound ACM allows you to configure a CTOG-250 Comtech Traffic Optimization Gateway to
dynamically adjust the DVB-S2 MODCODs that are sent to each CDM-840 Remote Router, based
on the conditions at that remote site. These conditions include antenna size, look angle and
satellite band, as well as the current environmental conditions. Each CDM-840 will automatically
and periodically send its Rx Es/No to the associated CTOG-250.
Figure 6-14. Configuration | WAN | Demod | ACM Page
Requirements for ACM operation are as follows:
•
Outbound ACM must be enabled at the CTOG-250.
•
When Outbound ACM is disabled at the CTOG-250, all packets will revert to the “VCM
Only MODCOD” which is configured in each QoS Group.
•
Each CDM-840 must be locked to the Shared Outbound carrier from the CTOG-250.
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If an CDM-840 Remote Router reports that its demod is unlocked, the ACM
Controller will assign the lowest MODCOD (QPSK ¼) to that remote in an
effort to “recover” the remote. Once the remote locks again, the ACM
algorithm adapts to the correct MODCOD for the reported Rx Es/No.
•
A packet path is required from the CDM-840 to the CTOG-250 Management interface.
Rx ACM Configuration
•
Rx Max MODCOD – Use the drop-down list to select the maximum demodulation type and
FEC rate (MODCOD). The available selections are:
•
•
•
•
•
•
QPSK 1/4
QPSK 3/5
QPSK 5/6
16APSK 2/3
32APSK 3/4
•
•
•
•
•
QPSK 1/3
QPSK 2/3
8PSK 3/5
16APSK 3/4
32APSK 4/5
•
•
•
•
•
QPSK 2/5
QPSK 3/4
8PSK 2/3
16APSK 5/6
32APSK 5/6
•
•
•
•
•
QPSK ½
QPSK 4/5
8PSK 3/4
16APSK 9/10
32APSK 9/10
Rx Target Es/No Margin – Use the drop-down list to select a margin value, in 0.5 dB
increments, from 0.0 to 4.5 dB.
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.
Click [Submit] to save.
Rx ACM Status (read-only)
Information is presented in this section as follows:
•
Rx ACM Enable – Identifies ACM operation as Enabled or Disabled.
•
Time Since Last Controller Announcement – Amount of time in seconds since the the
CDM-840 received an announcement message from the CTOG-250.
•
Max Time Since Last Controller Announcement – Maximum amount of time since last
announcement message was received from the CTOG-250.
•
ACM/VCM Controller IP Address – The assigned IP Address for the Controller. This will be
the management IP address for the associated CTOG-250.
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Configuration | WAN | Mod (Modulator) Pages
Click the Configuration | WAN | Mod tabs, and then select the Config or ACM tab to continue.
6.4.4.5.2.2.1 Configuration | WAN | Mod | Config
Use this page to configure CDM-840 Tx modulator operations.
Figure 6-15. Configuration | WAN | Mod | Config Page
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Modulator
The upper range of Data and Symbol Rate selection requires activation of the
TRANSMIT DATA RATE FAST option.
The acceptable/valid operating range for each item in this section is provided in parentheses.
•
Data Rate (16 to 15343 kbps) – Enter The CDM-840 Tx Data Rate in kbps. Click [Submit] to
save.
When Adaptive Coding and Modulation (ACM) is set to Enable, the Data Rate
is set automatically (manual configuration of Data Rate is disabled), and the
appearance of the Data Rate section changes as follows:
•
Symbol Rate (16 to 4500) – Enter The CDM-840 Tx Symbol Rate in ksps. Click [Submit] to
save.
•
FEC Type – At present, VersaFEC is the sole available FEC type.
•
Tx Frequency (950 to 2150 MHz) – Enter The CDM-840 Tx frequency in MHz.
•
MODCOD (applicable only to CCM Mode) – Use the drop-down list to select the Modulation
type and FEC rate (MODCOD). The available selections are:
o
o
o
o
o
o
VersaFEC MODCOD 0 – BPSK 0.488
VersaFEC MODCOD 1 – QPSK 0.533
VersaFEC MODCOD 2 – QPSK 0.631
VersaFEC MODCOD 3 – QPSK 0.706
VersaFEC MODCOD 4 – QPSK 0.803
VersaFEC MODCOD 5 – 8-QAM 0.642
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o
o
o
o
o
o
VersaFEC MODCOD 6 – 8-QAM 0.711
VersaFEC MODCOD 7 – 8-QAM 0.780
VersaFEC MODCOD 8 – 16-QAM 0.731
VersaFEC MODCOD 9 – 16-QAM 0.780
VersaFEC MODCOD 10 – 16-QAM 0.829
VersaFEC MODCOD 11 – 16-QAM 0.853
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•
Tx Scrambler – Use the drop-down list to select the Tx Scrambler as Off or Normal.
•
Roll Off – The Tx Alpha Rolloff (α) dictates how fast the spectral edges of the carrier are
attenuated beyond the 3 dB bandwidth. With 20% rolloff the edge falls off more quickly
than with 25% and 35%.
Use the drop-down list to set the expected filter Tx Alpha Rolloff (α) of the carrier as 20%,
25%, or 35%. The default selection is 20%.
•
Spectrum Invert – Use the drop-down list to select the Tx Spectrum Invert as Normal or Tx
Spectrum Inverted.
•
Power Level (-40 to 0) – Enter the Tx power level in dBm.
•
Carrier State – Use the drop-down list to select the Tx Carrier State as Off or On.
Select or enter the desired FEC Type, Tx Frequency, MODCOD, Tx Scrambler, Spectrum
Invert, and Carrier State settings. Click [Submit] to save.
RTI Configuration
RTI means RECEIVE/TRANSMIT INHIBIT. When selected, it will prevent the Tx carrier
from being transmitted until the demodulator is locked. To avoid the Tx Carrier
from being turned off when the demodulator loses lock for a very short period of
time, the demodulator must be unlocked continuously for the selected time period
(1 to 5 seconds) before the transmit carrier is inhibited.
•
Transmit Inhibit – Use the drop-down list to Disable or Enable RTI operation.
•
Wait Time – Enter a time, in seconds, to delay execution of the RTI function (when Enabled).
The range is from 1 to 5 seconds.
•
State (read-only) – The operational status of the RTI function is displayed here.
Click [Submit] to save.
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Modulator Frequency
The Tx Frequency Calculator provided here conveniently allows you to start from either the Tx
RF or Tx L-Band/IF Frequency and calculate the “other” frequency. If the BUC LO Mix, BUC LO
Frequency, and one of the desired frequencies are known, then the other can be calculated.
This calculator is intended to remove any guess work associated with the modem’s L-Band/IF
Frequency to the terminal’s RF frequency (or vice versa).
The acceptable/valid operating range for each item in this section is provided in parentheses.
•
Tx RF Frequency (0 to 67150) – This is the frequency at which the terminal is transmitting to
the satellite. Upon configuring this to a non-zero value, as well as entering in the BUC LO
Mix and Frequency, the modem’s L-Band or IF frequency will be automatically configured.
Enter the Tx RF Frequency in MHz. Click [Submit]. Upon submission, if the BUC LO
Frequency has been entered, the resulting Tx RF Frequency will be displayed.
If the BUC LO Frequency is left at the default configuration of zero, the Tx RF Frequency will
not be calculated.
The BUC LO Mix and BUC LO Frequency entries are provided for calculation
purposes only. BUC configuration is not updated as a result of configuring these
parameters.
•
BUC LO Mix – Use this drop-down list to select the BUC LO (Low Oscillator) Mix as Upconv
(SUM): RF=LO+LBand or DownConv (Diff): RF=LO-LBand.
Consult your BUC adjunct product datasheet or its Installation and Operation
Manual for the type of BUC (Upconverter [Sum] or Downconverter [Diff]) being
used.
•
BUC LO Frequency – Enter the known BUC Tx LO (Low Oscillator) Frequency in MHz.
Consult your BUC adjunct product datasheet or its Installation and Operation
Manual for the LO Frequency.
•
Tx L-Band Frequency (950 to 2150 MHz for L-Band, 50 to 180 MHz for IF) – Enter the L-Band
or IF-Band frequency in MHz. Click [Submit].
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6.4.4.5.2.2.2 Configuration | WAN | Mod | ACM
VersaFEC ACM requires Version 1.3.2 (or higher) firmware, and the appropriate FAST
code for the maximum operating symbol rate.
Use this page to configure CDM-840 Tx ACM operations.
Figure 6-16. Configuration | Mod | ACM Page
Tx ACM Configuration
•
ACM Enable – Use the drop-down list to Disable or Enable Tx ACM operation.
With ACM set to Enable, the Configuration | Mod | Config page updates to
disable manual configuration of the Max MODCOD (Data Rate) parameter.
•
Max MODCOD – Use the drop-down list to select the maximum Modulation type and FEC
rate (MODCOD). The available selections are:
o VersaFEC MODCOD 0 – BPSK 0.488
o VersaFEC MODCOD 6 – 8-QAM 0.711
o VersaFEC MODCOD 1 – QPSK 0.533
o VersaFEC MODCOD 7 – 8-QAM 0.780
o VersaFEC MODCOD 2 – QPSK 0.631
o VersaFEC MODCOD 8 – 16-QAM 0.731
o VersaFEC MODCOD 3 – QPSK 0.706
o VersaFEC MODCOD 9 – 16-QAM 0.780
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o VersaFEC MODCOD 4 – QPSK 0.803
o VersaFEC MODCOD 10 – 16-QAM 0.829
o VersaFEC MODCOD 5 – 8-QAM 0.642
o VersaFEC MODCOD 11 – 16-QAM 0.853
Target Es/No Margin (0.0 to 4.5) – Use the drop-down list to select a margin value, in 0.5 dB
increments.
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.
Click [Submit] to save.
Tx ACM Status (read-only)
From left to right:
Column
Description
Seconds since last LQRM
Amount of time (in seconds) since an LQ RM (Link Quality Report Message)
message was received from the associated CDD-880 Multi Receiver Router.
Max Seconds since last LQRM
Maximum amount of time since the last LQRM message was received.
IP Source of last LQRM
The source IP Address from where the last LQRM message was received.
Last Reported Es/No
EsNo value received in the last LQRM message.
Current MODCOD
Currently selected MODCOD.
Current DataRate
Current data rate based on current symbol rate and MODCOD.
Tx ACM Events (read-only)
In addition to the date- and time-stamp assigned for each event, information is presented in this
section as follows (from left to right):
Column
Description
Reported ES/No
EsNo value.
New MODCOD
Newly selected MODCOD.
New Tx DataRate
New data rate based on new MODCOD and current symbol rate.
Click [Clear ACM Events] to clear all ACM statistics from the buffer.
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6.4.4.5.2.3
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Configuration | WAN | QoS
The ADVANCED QUALITY OF SERVICE FAST feature, once activated, is available only
when the standard QoS feature is enabled.
The appearance of this page changes depending on the selected QoS Control Mode.
(TOP) QoS Control Mode = OFF
(BOTTOM) QoS Control Mode = Diffserv (Banner, VFP, Menu Bar not shown)
Figure 6-17. Configuration | WAN | QoS Page
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(TOP) QoS Control Mode = Max/Pri
(BOTTOM) QoS Control Mode = Min/Max (Banner, VFP, Menu Bar not shown)
Figure 6-18. Configuration | WAN | QoS Page (cont.)
Click the (Link to QoS Statistic page) hyperlink to access the Status | Statistics | QoS page (Sect.
6.4.4.5.2.3).
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QoS Control
The QoS Control section is typical for all active QoS configurations.
•
•
Mode – Use the drop-down list to select the mode of QoS operation:
Mode
Description
Off
This mode disables QoS. Instead of an oper able page, the Configuration | WAN |
QoS page appears as shown at top in Figure 6-17.
DiffServ
This m ode al lows t he C DM-840 t o oper ate i n Differentiated Services (DiffServ)
Mode to make it fully compliant to the Differentiated Services QoS RFC (Request For
Comments) standards. The Configuration | WAN | QoS page appears as shown at
bottom in Figure 6-17.
Max/Pri
This mode provides multi-level traffic prioritization with the ability to define a prioroity
and a maximum traffic per user-defined class/rule. The Configuration | WAN | QoS
page appears as shown at top in Figure 6-18.
Min/Max
This mode provides a C ommitted Information Rate (CIR) to each user-defined class
of traffic with the ability to allow a higher burstable rate depending on availability. The
Configuration | WAN | QoS page appears as shown at bottom in Figure 6-18.
Segmentation and Reassembly (SAR) – SAR is an adaptive process recommended for Tx
Data Rates < 700 kbps. At lower data rates, it improves the jitter and latency performance
for high priority packets. Use the drop-down list to Disable or Enable SAR.
Set the desired configurations. Click [Submit] to save.
Differentiated Services (Diffserv)
The Differentiated Services table appears only when QoS Control Mode = DiffServ.
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From left to right:
Column
Description
Index
The automatically-assigned specific rule internal index number is identified here.
Priority
IP traffic is prioritized based on the DSCP (DiffServ Code Points) Class Selector
Precedence.
Per-Hop Behavior (PHB)
This is the Traffic class that determines how packets will be forwarded.
Codepoint (DSCP)
This is the Code Point value for the Type of Service (ToS) byte in the IP header.
The option is provided to configure each queue to one of the following attributes. The
acceptable/valid operating ranges are provided in this section in parentheses, where applicable.
From left to right:
Column
Description
Service Rate (Kbps)
(0.000/(Tx D ata R ate)) T he m inimum bandw idth w ill be s erved first am ong t he
Assured Forwarding (ASFD) classes in case of bandwidth availability once Class
Selector 7 through Class Selected 1 have been serviced.
Drop Precedence
ASFD Class 4 through 1 Code Points (b100xx0, b011xx0, b010xx0, and b001xx0)
carry the drop precedence value (xx). In case of network congestion, a W eighted
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 t o 100) I n c ase of c ongestion, t he W RED i s appl ied af ter t he queue dept h
exceeds the configured percentage value assigned for the Drop Precedence value
b001.
Med. Drop Precedence
(% full)
(0 t o 99) I n c ase of c ongestion, t he W RED i s appl ied af ter t he queue dept h
exceeds the configured percentage value assigned for the Drop Precedence value
b001.
High Drop Precedence
(% full)
(0 t o 99) I n c ase of c ongestion, t he W RED i s appl ied af ter the queue dept h
exceeds the configured percentage value assigned for the Drop Precedence value
b011.
Set the desired configurations. Click [Submit] to save.
The QoS Rules Table (Edit) and Add New QoS Rule / Delete Rule sections appear only
when QoS Control Mode = Max/Pri or Min/Max.
QoS Rules Table (Edit)
When QoS Control is set to Max/Pri mode:
When QoS Control is set to Min/Max mode:
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From left to right:
Column
Description
Index
The automatically-assigned specific rule internal index number is identified here.
Protocol
The protocol for the specific rule is identified here.
• Src IP Mask
• Dst IP Mask
The Source and Destination IP Addresses/Masks are displayed in these columns.
•
•
•
•
Min Src Port
Max Src Port
Min Dst Port
Max Dst Port
The Source and Destination Ports are displayed in these columns.
• Min BW (Kbps)
(Min/Max mode only)
• Max BW (Kbps)
The bandwidth values are displayed in these columns.
Priority
(Max/Pri mode only)
The priority established for the specific rule is identified here.
WRED
The W RED ( Weighted R andom E arly D etection) s etting f or t he s pecific r ule i s
identified here as Disable or Enable. When WRED is enabled, the QoS Queue will
attempt t o s moothly dr op pa ckets as t he queue get s c ongested. T his i s
recommended for queues that will carry TCP packets.
Filter All
The flow filter setting for the specific rule is identified here as Disable or Enable.
Add New QoS Rule / Delete Rule
Refer to the QoS Rules Table (Edit) section for the description of each column.
• To delete an existing rule: For either page, Enter Rule Index to Delete. Click [Delete Rule]
when done. This deletes the specified entry from the QoS Rules Per Group Table.
•
To add a new rule: For either page, enter or select the desired information. Click [Add Rule]
when done. The index will automatically increment to the next available number when the
new rule is added.
•
When QoS Control is set to Max/Pri mode:
From left to right:
Column
Description
Priority
Use the drop-down list to designate a pr iority for this rule from 1 (Highest) to 8 (Lowest).
The QoS system allows multiple QoS rules to have the same priority. When QoS rules are
designated with the same priority, they are serviced on a time-sharing “round-robin” (timesharing) basis.
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Column
Description
WRED
Use the drop-down list to Enable or Disable Weighted Random Early Detection. When
WRED is enabled, the QoS Queue will attempt to smoothly drop packets as the queue gets
congested. This is recommended for queues that will carry TCP packets.
Filter All
Use the dr op-down list to Disable or Enable the flow filter setting. If enabled, all packets
matching this QoS Rule will be dropped.
When QoS Control is set to Min/Max mode:
From left to right:
Column
Description
WRED
Use the dr op-down list to Enable or Disable Weighted Random Early Detection. When
WRED is enabled, the QoS Queue will attempt to smoothly drop packets as the queue gets
congested. This is recommended for queues that will carry TCP packets.
Filter All
Use the drop-down list to Disable or Enable the flow filter setting.
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Configuration | WAN | Label
Use this page to assign up to four Generic Stream Encapsulation (GSE) labels.
Figure 6-19. Configuration | WAN | Label Page
Receive WAN Labels
Edit the Label 1 through Label 4 text boxes to suit. Each label has a valid range of 1 to 2047.
The assigned Receive WAN Labels must match the WAN Labels assigned on the
CTOG-250 Route Table. Note that the preferred method of operation (as required
for ACM/VCM Operation) is to configure a unique WAN Label in Entry #1 for each
CDM-840 across the networ,k and then enable CDRP on the CTOG-250. The
associated Route to WAN Label will be automatically updated and maintained.
Create the desired labels. Click [Submit] to save.
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Configuration | WAN | Compression
Use this page to configure the Payload and Header Compression feature, if enabled.
Figure 6-20. Configuration | WAN | Compression Page
Click the (Link to Compression Statistic page) hyperlink to access the Status | Statistics |
Compression page (Sect. 6.4.4.6.1.3).
Refresh Rates
Enter each refresh rate, from 1 to 600 packets or 1 second (whichever comes first). From left to
right:
Feature
Description
Header Compression for UDP
User Datagram Protocol refresh rate
Header Compression for RTP
Real Time Protocol refresh rate
Header Compression for all others
Default protocol refresh rate
Payload Compression
Payload Compression refresh rate
Set the desired rates. Click [Submit] to save.
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Managed Switch Mode Configuration (BPM Mode)
Use the drop-down lists to Enable or Disable Payload and Header Compression for all of the
transmitted packets when operating in Bridge Point-to-Multipoint (BPM) Mode. Click [Submit]
to save.
In Managed Switch Mode, the selected Compression modes apply to all traffic.
6.4.4.5.2.6
Configuration | WAN | BUC (Block Upconverter)
This page is operational only when an optional BLOCK UPCONVERTER is installed.
Use this page to configure Block Upconverter parameters, and to display the BUC status for
L-Band operation.
Figure 6-21. Configuration | WAN | BUC Page
BUC Control
The acceptable/valid operating range for each item in this section is provided in parentheses.
•
BUC Power Supply – Use the drop-down list to select the BUC Power Supply as Off or On.
•
BUC 10 MHz Reference Enable – Use the drop-down list to select the BUC 10 MHz
Reference Enable as Off or On.
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BUC Low or High Current Limit (0 to 4000) – Enter the BUC current alarm for either limit in
100mA increments.
Set the desired BUC configurations. Click [Submit BUC Control] to save.
BUC Status
BUC Power Supply, BUC Voltage (V), and BUC Current (mA) – When the presence of BUC Power
Supply is detected, it is acknowledged here and its voltage and current information is
continuously monitored and is provided on a read-only basis.
Click [Refresh] to update this section with its latest available statistics.
6.4.4.5.2.7
Configuration | WAN | LNB (Low Noise Block Downconverter)
This page is operational only
DOWNCONVERTER is installed.
when
an
optional
LOW-NOISE
BLOCK
Use this page to configure Low-Noise Block Downconverter parameters, and to display the LNB
status for L-Band operation.
Figure 6-22. Configuration | WAN | LNB Page
LNB Control
The acceptable/valid operating range for each item in this section is provided in parentheses.
•
LNB DC Power – Use the drop-down list to select the power as Off, 13V, 18V, or 24V.
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•
LNB Reference Enable – Use the drop-down list to Enable or Disable the LNB Reference.
•
LNB Current Threshold (Low and High) (0 to 500) – Enter a value, in mA, for either function.
Set the desired LNB configurations. Click [Submit LNB Controls] to save.
LNB Status
This read-only section provides the LNB Current (mA) and LNB Voltage (V) information.
Click [Refresh] to update this section with its latest available statistics.
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Configuration | Network Pages
Precision Time Protocol is not available in this firmware release. The PTP tab, while
available and selectable on this interface, is therefore non-functional.
Click the Configuration | Network tabs, and then select the Routing, ARP, Working Mode, or
DNS tab to continue.
6.4.4.5.3.1
Configuration | Network | Routing Pages
Click the Configuration | Routing tabs, and then select the Routes, IGMP, or DHCP tab to
continue.
6.4.4.5.3.1.1 Configuration | Network | Routing | Routes
Use this page to enter static routes for IP traffic over the satellite or to another device on the
local LAN.
Figure 6-23. Configuration | Network | Routing | Routes Page
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Add New Route
Use this section to directly add a Route Table entry. From left to right:
Column
Description
Index
This is the read-only internal table index. It cannot be edited.
Description
Enter a l abel s tring i n t his t ext box . T his l abel hel ps t o m aintain t he net work. T he
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 t he des ired Next Hop I P Address f or toLAN routes. N ote t hat no N ext H op
entry is needed for toWAN routes.
Header Comp.
Use the drop-down list to Disable or Enable Header Compression operation.
Payload Comp.
Use the drop-down list to Disable or Enable Payload Compression operation.
Enter the desired information. Click [Add Entry] when done. The index automatically increments
to the next available number when the new route is added.
When in Router Mode, the CDM-840 will not transmit a multicast address in the
Internet control range (224.0.0.0 to 224.0.1.255). It filters the packets.
Delete Route
Enter Route Index to Delete. This deletes the specified route entry from the route table. Click
[Delete Entry] when done.
Route Table (Edit)
Use the text boxes and drop-down lists to edit all current Route Table entries, as described
previously for the Add New Route section.
Click [Submit Changes] to save.
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6.4.4.5.3.1.2 Configuration | Network | Routing | IGMP
IGMP (Internet Group Management Protocol), 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 stops forwarding the multicast traffic
(received from the satellite) to the LAN.
Use this page to enable IGMP for configured multicast routes.
Figure 6-24. Configuration | Network | Routing | IGMP Page
IGMP
Use the drop-down list to select IGMP as Enable.
IGMP Configuration
The acceptable/valid operating ranges are provided in this section in parentheses, where
applicable.
•
Version – Use the drop-down list to select IGMPv1, IGMPv2, or IGMPv3.
•
Last Member Query Interval (1 to 25) – This is the maximum response time inserted into
group-specific 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
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"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. The default is 1 second.
•
Query Interval (1 to 60) – This is the interval between general queries sent by the unit. By
varying the query interval, the administrator may tune the number of IGMP messages on
the subnet; note that larger numbers cause the IGMP queries to be sent less often.
Enter a value, in seconds. The default is 1 second.
•
Query Response Interval (1 to 25) –This is the maximum response time inserted into the
periodic general queries. By varying the Query Response Interval, the 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. The default is 10 seconds.
The number of seconds assigned to the Query Response Interval must be less
than the Query Interval.
Click [Submit] to save.
IGMP Table
This read-only table lists the IGMP Groups that are active on the unit. 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.
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6.4.4.5.3.1.3 Configuration | Network | Routing | DHCP
DHCP (Dynamic Host Configuration Protocol) 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 have been connected to the network. This prevents
two devices from accidentally being configured with the same IP Address.
Figure 6-25. Configuration | Network | Routing | DHCP Page
DHCP Relay
The CDM-840 DHCP Relay feature allows the operator to deploy a single DHCP server at the hub
that manages all of the devices throughout the operator's remote networks. When a device on
the CDM-840 network issues a DHCP request, it is relayed to the DHCP server as specified by the
"Relay IP Address". The DHCP response is then sent directly to the requesting device.
•
Relay Feature – Use the drop-down list to select the DHCP Relay feature as Enable or
Disable.
•
Relay 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.
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Configuration | Network | ARP
Use this page to configure CDM-840 ARP (Address Resolution Protocol) parameters.
Figure 6-26. Configuration | Network | ARP Page
Add Static ARP
Enter the desired IP and MAC addresses. Click [Add Entry] when done. The Index column
automatically increments to the next available number when the specified static ARP entry is
added to the ARP Table.
Delete Static ARP
Enter Entry Index to Delete – This deletes the specified entry index from the ARP Table.
Click [Delete Entry] when done.
Flush Dynamic ARPs
Click [Flush ARP Table] – This deletes all dynamically-learned ARP entries.
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ARP Table (Edit)
This section displays all current Static and Dynamic ARP entries, and allows to user to directly
edit the current Static ARP entries. From left to right:
Column
Description
Index
This is the read-only internal table index. It cannot be edited.
IP
Entry IP Address, in the form XXX.XXX.XXX.XXX.
MAC
New data rate based on new MODCOD and current symbol rate.
Type
Entry Type is specified as Static or Dynamic and cannot be edited.
Make the desired IP and MAC Address edits. Click [Submit Changes] to save.
6.4.4.5.3.3
Configuration | Network | Working Mode
Appendix C. BRIDGE POINT-TO-MULTIPOINT (BPM) OPERATION
Figure 6-27. Configuration | Network | Working Mode Page
Working Mode
Select the desired working mode, and then click [Submit] to save:
•
In BPM Mode, all L2/L3/L4 protocols such as VLAN, MPLS, IPv6, OSPF, and BGP will flow
through the network as they would through an off-the-shelf Ethernet Switch. The
Advanced VSAT BPM feature makes the Advanced VSAT equipment appear as a “Sky
Ethernet Switch”. This will allow for a greatly simplified network deployment.
•
In Router Mode, the traffic ports of the CDM-840, CTOG-250, and CDD-880 are
configured to function as a Router.
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Configuration | Network | DNS
Use this page to manage DNS (Domain Name System) caching. DNS caching speeds up Internet
access by eliminating subsequent queries over the satellite link.
Figure 6-28. Configuration | Network | DNS Page
Note the following:
•
When the CDM-840 receives a DNS query at one of its Ethernet Ports, a DNS cache look
up is performed in the local DNS cache. If the entry is found, a DNS response message is
immediately returned to the requesting entity with a time-to-live value of 10 seconds. If
no match is found, the request packet is forwarded to the Hub.
•
When a DNS response packet is received from Hub, a check is made to see if the entry
already exists in the cache. If it exists, the time-to-live for the entry is reset to 900
seconds (15 minutes). If it’s a new entry it is added to the cache with time-to-live set to
900 seconds (15 minutes).
•
The local DNS cache is periodically cleaned by removing expired entries
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.
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Configuration | ECM (Entry Channel Mode)
This page is operational only when the optional dSCPC FAST feature and VIPERSAT
MANAGEMENT SYSTEM (VMS) is installed and enabled.
•
•
Appendix F. ENTRY CHANNEL MODE (ECM) in this manual
Appendix G. ENTRY CHANNEL MODE SWITCHING in the adjunct CEFD publication
VMS v3.x.x VIPERSAT Management System User Guide (CEFD P/N MN/22156)
ECM (Entry Channel Mode) provides a method for remotes requiring dSCPC access channels to
either enter the network initially or re-enter the network after a power or service outage. Use
this page to configure ECM.
Figure 6-29. Configuration | ECM Page
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ECM Remote Configuration
The acceptable/valid operating ranges for items in this section are provided in parentheses.
•
Mode – Use the drop-down list to select operation as Disabled, Offline, Wait, or Online:
Selection
Description
Disabled
This disables ECM operation.
Offline
The remote will not transmit and remains in this standby mode until a new
state is selected, either locally or from the VMS.
Application examples for this mode include COTM (communications on the
move) or military maneuvers requiring radio silence conditions.
Wait
Keeping CDM-840(s) in the ECM channel may result in oversubscription,
where some percentage of remotes wait their turn for pooled SCPC
resources. The user may choose to selectively control remotes through
manual, scheduled, or external switch request commands.
By selecting Wait, the CDM-840(s) remain in standby mode, but continue to
send status messages to the VMS and CTOG-250 Comtech Traffic
Optimization Gateway (w/integrated CDM-800 Gateway Router).
In Wait mode, messages directed to the VMS update connected link status,
while ACM, CDRP, and traffic data statistics sent to the CTOG-250 maintain
forward path ACM and routing tables (if in dynamic routing mode).
Online
The CDM-840 powers up, requests network registration, and switches to
dSCPC at its minimum site policy data rate setting. This is the most common
mode of operation.
Click [Submit] to save.
•
Multicast IP – Enter the IP address for the Multicast of the Transmission Announcement
Protocol (TAP) message that is sent out by the CDD-880 Multi Receiver Router to all of the
associated CDM-840 or CDM-840 Remote Routers in that group.
•
Group ID (0 to 255) – Enter the Group ID number for the CDD-880 to which this unit
belongs.
•
Power Hunt Enable – Use the drop-down list to select this function as Disable or Enable.
When enabled, the transmission power control feature for the unit modulator is activated
while in Entry Channel Mode (ECM). This function provides compensation during periods of
impaired transmission or for instances when the initial (baseline) power value is insufficient,
and assists in maintaining return link integrity.
•
Rx LO Frequency – Assign a value, in MHz, to the Rx LO (Low Oscillator) Frequency.
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•
Tx LO Frequency – Assign a value, in MHz, to the Tx LO (Low Oscillator) Frequency.
•
Base Power (–40.0 to 0.0) – Enter the power level, in dBm, for transmission of the Aloha
ECM signal. This level was determined for this unit when its terminal was commissioned,
and must be calibrated with the satellite provider.
Click [Submit] to save.
ECM Remote Status (read-only)
•
Cycle Length – The Cycle Length is the total length of time, in milliseconds, between the
start of a transmission and the completion of the transmission cycle (TAP) transmitted by
the CDD-880 to the CDM-840 or CDM-840 Remote Routers in the ECM group. It is the
product of the number of slots and the slot length (consisting of the preamble, data slot
size, and guard band).
•
Aloha State – The Aloha State indicates the current state of this unit during the ECM cycle:
Unit State
Description
Idle
Unit is not transmitting; either inactive or waiting for switching assignment.
Active
Unit is actively transmitting (probing) to the Hub for either registration or request for switching
to dSCPC.
Switched
Remote has successfully switched from ECM to dSCPC.
•
Current Tap – Indicates current value of sequential progression of TAP message
transmission. Ranges from 0 to 255, then repeats.
•
Current Slot – The time slot number that has been assigned to this unit in the transmission
cycle for switching from ECM to dSCPC.
•
Home State Revert Timer – The time, in seconds, that must pass without receiving
communications from the HCC (Hub Channel Controller – i.e., Demod #1 on the CDD-880,
the designated ECM controller) TAP message before this unit is reverted from dSCPC mode
back to ECM to re-establish communications settings for receiving the TAP. This parameter
is set in the VMS.
•
Probing Duration – Amount of time, in seconds, that this unit has been transmitting to the
HCC to request registration and switchout.
•
Seconds Until Next Probe – The time period, in seconds, before this unit will again transmit
to the HCC.
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Configuration | dSCPC (Dynamic Single Carrier per Channel)
This page is operational only when the optional dSCPC FAST feature and VIPERSAT
MANAGEMENT SYSTEM (VMS) is installed and enabled.
Use the optional dSCPC (Dynamic Single Carrier per Channel) FAST feature to enable dynamic
allocation and sharing of bandwidth among users.
Figure 6-30. Configuration | dSCPC Page
Load Switching Configuration
The acceptable/valid operating ranges for items in this section are provided in parentheses.
•
Mode – Use the drop-down list to select operation as Disabled or Enabled. Click [Submit]
when done.
•
Step Up Threshold (0 to 100) – Enter the percentage of bandwidth use that will trigger a
switch up from the present SCPC rate to a higher rate to ensure that there is sufficient
bandwidth available for current conditions. Note that this value must be greater than the
value specified for the SCPC Step Down Threshold. A typical setting for this parameter is
95%.
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•
Step Down Threshold (0 to 100) – Enter the percentage of bandwidth use that will trigger a
switch down from the present SCPC rate to a lower rate to ensure efficient bandwidth usage
for current conditions. Note that this value must be less than the value specified for the
SCPC Step Up Threshold. A typical setting for this parameter is 65%.
•
Delay (1 to 50) – Enter the Switching Delay period, in seconds, to ensure that a premature
switch up or down in the SCPC rate does not occur due to a temporary rise or fall in traffic.
•
Excess Capacity (0 to 100) – Enter the Excess Capacity data rate percentage to be added to
the SCPC data rate. This setting makes additional bandwidth available for when demand
arises while minimizing Step Up switching events.
ToS Switching Configuration
•
Enable – Use the drop-down list to select operation as Disabled or Enabled.
•
Max # of Sessions (per ToS Id) (1 to 127) – Allows setting a limit for the number of active
sessions for a particular ToS switch type. Note that the overall limit for active sessions in the
network is 127.
Click [Submit] to save.
(ToS Rules Table)
The acceptable/valid operating range for each item in this section is provided in parentheses.
From left to right:
Column
Description
Index
The automatically-assigned specific rule internal index number is identified here.
Name
(1 to 20 characters) – Enter a text label for circuit identification.
ID
(1 to 63) – Enter an integer value for the ToS ID.
Type
(64 to 254) – Enter an integer value for the Switch Type to inform the VMS what switching
policy to use.
SCPC Data Rate
(16 to 16000) Enter the desired data rate, in kbps, for this service type.
Timeout
(0 to 60) Enter the timer setting, in seconds, for restoring the home state condition once data
packet flow stops.
To edit a ToS Switching Configuration rule: Edit the information for the specific indexed rule.
Click [Change] when done.
To delete a ToS Switching Configuration rule: Click [Delete] to delete the specific indexed rule
from the ToS Rules Table.
To add a ToS Switching Configuration rule: Enter the information for the new rule. Click [Add
Entry] when done. The rule will be assigned to the next incremented index number, with
[Change] and [Delete] functionality assigned to the new entry.
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Status Pages
The Status pages provide status, event logging, and operational statistics windows.
Click the Status tab, and then select the Statistics or Monitor tab to continue.
6.4.4.6.1
Status | Statistics Pages
Click the Statistics | Statistics tabs, and then select the Traffic, Router, Compression, QoS, and
for the CDM-840 only, the E1 or Trending tab to continue.
6.4.4.6.1.1
Status | Statistics | Traffic
Use this page to view read-only, abridged status windows pertaining to the basic operational
statistics for the Ethernet, Modulator, and Demodulator traffic.
Figure 6-31. Status | Statistics | Traffic Page
Statistics Control
Click [Clear All Stats] to clear all operational statistics from the buffer. Otherwise, click [Refresh]
to update the page with its latest available statistics.
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Ethernet Statistics
From left to right:
Column
Description
Total Pkts Xmitted
Total number of packets transmitted.
Total Pkts Rcvd
Total number of packets received.
UC Pkts Xmitted
Unicast packets transmitted.
UC Pkts Rcvd
Unicast packets received.
MC Pkts Xmitted
Multicast packets transmitted.
MC Pkts Rcvd
Multicast packets received.
Current Xmitted (kbps)
Most recent transmitted data rate (in kilobits per second).
Current Rcvd (kbps)
Most recently received data rate (in kilobits per second).
Maximum Xmitted (kbps)
Peak transmitted data rate (in kilobits per second).
Maximum Rcvd (kbps)
Peak received data rate (in kilobits per second).
Mod Statistics
From left to right:
Column
Description
Pkts Xmitted
Packets transmitted.
UC Pkts Xmitted
Unicast packets transmitted.
MC Pkts Xmitted
Multicast packets transmitted.
Pkts Dropped
Packets dropped.
UC Pkts Dropped
Unicast packets dropped.
MC Pkts Dropped
Multicast packets dropped.
Current (kbps)
Most recent symbol rate (in kilobits per second).
Maximum (kbps)
Peak symbol rate (in kilobits per second).
Total Bytes Xmitted
Total number of bytes transmitted.
Demod Statistics
From left to right:
Column
Description
Pkts Rcvd
Packets received.
UC Pkts Rcvd
Unicast packets received.
MC Pkts Rcvd
Multicast packets received.
Pkts Dropped
Packets dropped.
UC Pkts Dropped
Unicast packets dropped.
MC Pkts Dropped
Multicast packets dropped.
Cur Rate (kbps)
Most recent symbol rate (in kilobits per second).
Max Rate (kbps)
Peak symbol rate (in kilobits per second).
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Status | Statistics | Network Pages
Precision Time Protocol is not available in this firmware release. The PTP tab, while
available and selectable on this interface, is therefore non-functional.
Click the Status | Statistics | Network tabs, and then select the Router tab to continue.
6.4.4.6.1.2.1 Status | Statistics | Network | Router Page
Use this page to view cumulative traffic information.
Figure 6-32. Status | Statistics | Network | Router Page
Clear Statistics
Click [Clear] to clear all operational statistics from the buffer.
Interface Counters / Router Counters
For each section, click [Refresh] to update the section with its latest available statistics.
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Status | Statistics | Compression
This page is functional only when Tx and Rx Header and Payload Compression are
enabled. Use the Configuration | WAN | Compression page (Sect. 6.4.4.5.2.5) to
enable or disable Compression operation.
Use this page to view read-only cumulative WAN, Payload Compression, and Header
Compression statistics.
Figure 6-33. Status | Statistics | Compression Page
Click the (Link to Compression Configuration page) hyperlink to access the Configuration |
WAN | Compression page (Sect. 6.4.4.5.2.5).
Clear Compression Counters
Click [Clear] to clear all compression statistics from the buffer.
WAN / Payload Compression / Header Compression Statistics
Click [Refresh] to update each page section with its latest available statistics.
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6.4.4.6.1.4 Status | Statistics | QoS
The appearance of this page changes depending on the selected QoS Control Mode.
(TOP) Page with QoS Control Mode = OFF, Max/Pri, or Min/Max
(BOTTOM) Page with QoS Control Mode = Diffserv (Banner, VFP, Menu Bar not shown)
Figure 6-34. Status | Statistics | QoS Pages
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Click the (Link to QoS Configuration page) hyperlink to access the Configuration | WAN |QoS
page (Sect. 6.4.4.5.2.3).
Clear QoS Counters
The Clear QoS Counters section is typical for all page configurations. Click [Clear] to
clear all operational statistics from the buffer.
QoS Statistics
The appearance of the QoS Statistics section differs depending on the active page
configuration. See the Configuration | WAN | QoS page for the definition of the
terms used in this table. Click [Refresh] to update this section with the latest
available statistics.
When QoS Control Mode is set to Off, Max/Pri or Min/Max:
When QoS Control Mode is set to DiffServ:
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Status | Statistics | E1 Pages (CDM-840 only)
Use these read-only pages to view cumulative CDM-840 E1 traffic information. Click the Status |
Statistics| E1 tabs, and then select the Transmit or Receive tab to continue.
6.4.4.6.1.5.1 Status | Statistics | E1 | Transmit
Figure 6-35. Status | Statistics | E1 | Transmit Page
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E1 Transmit Packet Statistics
From left to right:
Column
Description
E1 Priority
Priority as related to E1 configuration (inband signaling/configuration is always
conveyed as Priority 1).
QoS Index
System-assigned Quality of Service Index.
Tx Packets
Number of packets transmitted.
Dropped Packets
Number of packets dropped (errors or bandwidth limitations).
Tx Packet Rate (pkts/s)
Packet rate (packets per second).
Tx Data Rate (kbps)
Data rate ( kilo bits per second).
Click [Refresh] to update this section with its latest available statistics.
Click [Clear] to clear all E1 Transmit Packet statistics from the buffer.
E1 Transmit Statistics
Row
Description
Compression Error Count
Number of compression errors detected.
Tx Status Packet Count
Number of status packets transmitted (status packets are transmitted every
500ms).
Click [Refresh] to update this section with its latest available statistics.
Click [Clear] to clear all E1 Transmit Packet statistics from the buffer.
Transmit Time Slot Status (Auto Detected)
•
Slot – Numbered 0 through 31.
•
Type – Slots are detected as Idle or Active. Idle time slots, once detected, do not utilize
bandwidth.
Click [Refresh] to update this section with its latest available statistics.
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6.4.4.6.1.5.2 Status | Statistics | E1 | Receive
Figure 6-36. Status | Statistics | E1 | Receive Page
Clear E1 Receive Statistics
Click [Clear] to clear all E1 Receive Statistics from the buffer.
E1 Receive Packet Statistics
From left to right:
Column
Description
Rx Packets
Number of RAN packets received.
Discarded Packets
Number of discarded Rx packets (errored packets).
Rx Packet Rate (pkts/s)
Current number of packets received (packets per second).
Rx Data Rate (kbps)
Current Rx data rate (kilobits per second).
Click [Refresh] to update this section with its latest available statistics.
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E1 Receive Statistics
From left to right:
Row
Description
Decompression Error Count
Number of decompression errors detected..
Receive Status Packet Count
Number of status packets received (status packets are received every
500ms).
Jitter Buffer Overflow Count
Number of times that the jitter buffer has overflowed (indicates too
much data; jitter latency is not set high enough if count increases
consistently).
Jitter Buffer Underflow Count
Number of times that the jitter buffer has underflowed (indicates not
enough data; jitter latency is not set high enough if count increases
consistently.
Click [Refresh] to update this section with its latest available statistics.
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Status | Statistics | Trending (CDM-840 only)
Appendix G. WAN/RAN OPTIMIZATION
This page provides an updating graphical representation of several CDM-840 IP traffic handling
statistics. When the presence of the optional E1 FAST feature is detected and enabled, E1 RAN
Optimization trending characteristics are also provided.
Figure 6-37. Status | Statistics | Trending Page (20 minutes selected)
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To initialize the page: Select the Time Span for the graphs as 20 minutes, 3 Days, or 30 Days,
and then click [Update]. Allow a few seconds for the graphs to visually update.
Traffic Throughput (kbps)
This graph displays utilization of the available data traffic types:
Data Traffic Type
Description
WAN E1
WAN data rate associated with E1/RAN traffic.
WAN IP
WAN data rate associated with IP traffic.
WAN Total
WAN data rate total (WAN E1 + WAN IP).
E1 Ingress
Data rate of E1 time slots carried (64K * number of time slots).
Traffic Ether Ingress
Data rate of Ethernet traffic (WAN/E1 ingress utilization).
Modem Tx Datarate
Modem transmit data rate.
Select as many or as few of the applicable types from the legend to the right of the graph. Allow
a few seconds for the graph to display the selected traffic data types.
RAN Link Quality
This graph provides the performance indicator for the Tx RAN Link Quality metric, a qualitative
measure of the voice quality predicated by a) the level of compression, and b) traffic packet
optimization required to accommodate the incoming traffic into the available WAN (satellite)
bandwidth.
Association of the Link Quality Metric to its comparative Link Quality is as follows:
Link Quality Metric
Link Quality
8
7
6
5
4
3
2
Excellent
Very Good
Good
Fair
Average
Poor
Very Poor
1
Note that ‘8’ on the graph indicates the highest quality, with no voice traffic optimization.
RANOp Savings
This graph provides the performance indicator for Tx RAN Optimization on the actual
“percentage of savings” basis.
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Status | Monitor
Use this read-only page to view the unit temperature, alarms summary, plus a scrollable window
that displays any events and alarms as logged by the unit during normal operation.
Figure 6-38. Status | Monitor Page
System Monitor
This section displays the operating temperature of the unit (°C). Click [Refresh] as needed to
update this display.
Alarms
This section tallies the Unit, Tx, Rx, BUC, LNB, and Traffic Ethernet alarms compiled since the
logging buffer was last cleared.
Click [Refresh Alarms] to update this section with the latest available information.
Events
The ‘STORED EVENT’ LED provided on the Enhanced Mode Virtual Front Panel lights
amber to indicate the presence of any stored event(s) or alarm(s).
Each logged event or alarm is Date- and Time-stamped, and a Description is provided. Click
[Refresh Events] to update the Events table with the most recently recorded events. Otherwise,
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click [Clear Event Table] to delete all existing logged entries from the Events log. The log is then
reset to one (1) entry: “INFO – Event Log Cleared”.
6.4.4.7
Utility Pages
Click the Utility tab, and then select the Utility or Reboot tab to continue.
6.4.4.7.1
Utility | Utility
Use this page to access a variety of top-level system operation controls, stored unit
configurations, and test utilities.
Figure 6-39. Utility | Utility Page
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Modem
•
Unit Name – The product (e.g., CDM-840) is identified here.
•
System Contact / System Location – Comtech EF Data Customer Support e-mail and
telephone contact information is provided here.
Enter the desired information. Click [Submit] to save.
•
Set Time (hh:mm:ss) – Use HH:MM:SS format (where HH = hour [00 to 23], MM = minutes
[00 to 59], and SS = seconds [00 to 59]) to enter a time.
•
Set Date (dd/mm/yy) – Use the European time format DD/MM/YY (where DD = day [01 to
31], MM = month [01 to 12], and YY = year [00 to 99]) to enter a date.
Set the Time and Date. Click [Submit] to save.
•
Circuit ID – Enter a Circuit ID string consisting of 4 to 24 characters, and then click [Submit]
to save.
•
G.703 Clock Extended Mode (CDM-840 only) – Use the drop-down list to select this
operating mode as Off or On, and then click [Submit] to save.
•
10 MHz Internal Adjustment – Enter a value from -999 to (+)999 to set the adjustment for
the Internal 10 MHz High Stability Reference, and then click [Submit] to save.
•
Test Mode – Use the drop-down list to select the operating mode:
Mode
Description
Normal Mode
This mode clears any test modes or loopbacks, and places the unit back into an operational state.
Tx CW
This test mode forces the modulator to transmit a pure carrier (unmodulated).
Tx Alt 1/0
This test mode forces the modulator to transmit a carrier modulated with an alternating 1,0,1,0
pattern, at the currently selected symbol rate. This causes two discrete spectral lines to appear,
spaced at +/- half the symbol rate, about the carrier frequency. Use this mode to check the carrier
suppression of the modulator.
Select the desired Test Mode. Click [Submit] to execute.
Save/Load Configuration
This section allows you to save, and then load (recall) up to 10 configuration sets:
•
To save a configuration set:
o
First, adjust all operational configuration parameters to suit.
o
Then, use the top (Save) Select Location dropdown to select 1 through 10.
o
Finally, click [Save Configuration] to store the configuration settings.
6–76
CDM-840 Remote Router
Ethernet-based Remote Product Management
•
Revision 2
MN-CDM840
To load (recall) a configuration set:
o
First, use the bottom (Load) Select Location dropdown to select 1 through 10.
o
Then, click [Load Configuration] to recall the selected configuration settings.
BERT Config
(Where BERT is the acronym for Bit Error Rate Test) Use the drop-down lists to:
•
Configure the Tx or Rx BERT State as On or Off.
•
Configure the Tx or Rx BERT Pattern as 2^23-1 (223-1) or 2047.
•
Set Error Insertion as either Off or 10E-3.
Select the desired BERT settings. Click [Submit] to save the settings and execute the test.
BERT Monitor
This section displays the ongoing BERT. Click [Restart] to restart the BERT Monitor. Otherwise,
click [Update] to refresh a test already in progress.
Once the Tx BERT is executed, the entire outbound carrier transmits a BERT pattern.
All IP communications are halted during this test.
Note also that the Rx BERT State for the CDM-840 must be enabled for a CDM-800
Gateway Router to properly receive and monitor the BERT pattern.
Redundancy
•
Current Redundancy State (read-only) – Status is listed as On Line or Off Line.
•
Offline Unit Status (read-only) – This indicates the status of the offline unit.
If the unit is not connected to a redundancy switch, the status is listed as No_1F1.
Otherwise, its status is listed as On Line or Off Line.
If the unit is part of a 1:1 or 1:N redundant pair of CDM-840s, and this unit is currently On Line,
click [Force Redundancy Switch] to cause the unit to switch to standby.
Console Configuration
Use the drop-down list to select the desired communications protocol for the rear panel
‘CONSOLE’ port. Click [Submit] to save. The available selections are:
o
o
RS232-8N1-38400
RS485-8N1-38400
o
o
RS485-8N1-9600
RS485-8N1-57600
6–77
o
o
RS485-8N1-19200
RS485-8N1-115200
CDM-840 Remote Router
Ethernet-based Remote Product Management
6.4.4.7.2
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MN-CDM840
Utility | Reboot
Use this page to perform a soft reboot of the CDM-840. Note that the function of this page is
identical to the System Reboot section of the Admin | Firmware page (Sect. 0).
Figure 6-40. Utility | Reboot Page
CDM-840 Reboot
Click [Reboot] to reboot the unit. A dialogue box
appears to prompt continuation or cancellation of
the reboot process:
Click [OK] to continue the reboot process, or [Cancel] to abort the process and return to the
Utility | Reboot page.
Once the reboot process resumes, the Utility | Reboot page is replaced with the dynamic
message “Please wait...the CDM-840 is rebooting, login available in XXX seconds” – the time
count decrements to 0 seconds before the unit reboots. After the reboot, login is required once
again to resume use of the Web Server Interface.
6–78
Chapter 7. SERIAL-BASED REMOTE PRODUCT
MANAGEMENT
7.1
Introduction
1. The Serial-based Remote Product Management Interface is intended to provide two important capabilities:
•
First, it allows you to establish IP communications (Web, SNMP) when the unit is first being configured.
•
Second, the interface allows you to bring the CDM-840 back online through the serial or Telnet Interface over a
very slow speed "backup channel”.
This interface is NOT intended to be a full featured interface to configure all aspects of the modem. Rather, its purpose
is to provide enough commands to allow a terminal to be brought back online.
Once communications have been re-established, the standard interfaces (Web, SNMP, NetVue) can be used complete
any additional detailed configuration/control/monitoring functions
USE OF THE SERIAL-BASED REMOTE PRODUCT MANAGEMENT INTERFACE IS RECOMMENDED ONLY FOR ADVANCED
USERS.
See Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT for details on using the CDM-840 SNMP
and Web Server Interfaces.
7–1
CDM-840 Remote Router
Serial-based Remote Product Management
Revision 2
MN-CDM840
2. To proceed with Serial-based Remote Product Management, assumptions are made that:
•
The CDM-840 is operating with the latest version firmware files.
•
The CDM-840 is connected to a user-supplied, Windows-based PC, and:
o
The PC serial port is connected to the CDM-840 rear panel ‘CONSOLE’ port using a user-supplied serial cable.
o
The PC Ethernet port is connected to the CDM-840 rear panel ‘MANAGEMENT | FE’ 10/100 BaseT Ethernet
port with a user-supplied hub, switch, or direct Ethernet cable connection.
o
The PC is running a terminal emulation program (for operation of the CDM-840 Serial Interface), and a
compatible Web browser (for operation of the CDM-840 Web Server Interface).
o
The CDM-840 Management IP Address has been noted using the CDM-840 Serial Interface.
Remote product management is available through the
EIA-232 operational interface, where the ‘Controller’
device (the user PC or an ASCII dumb terminal) is
connected directly to the ‘Target’ device (the
CDM-840 Remote Router, via its DB-9M ‘CONSOLE’
port). This connection makes possible serial remote
monitor and control (M&C) of the CDM-840 through
the CDM-840 Serial Interface.
Through this EIA-232 connection (for the control of a single device), data is transmitted in asynchronous serial form, using ASCII
characters. Control and status information is transmitted in packets of variable length in accordance with the structure and protocol
defined later in this chapter.
Access to the CDM-840 Serial Interface is accomplished with a user-supplied terminal emulator program such as Tera Term or
HyperTerminal. Use this utility program to first configure serial port communication and terminal display operation:
7–2
CDM-840 Remote Router
Serial-based Remote Product Management
Revision 2
MN-CDM840
•
38400 bps (Baud Rate)
•
8 Data Bits
•
1 Stop Bit
•
Parity = NO
•
Port Flow Control = NONE
•
Display New line Rx/Tx: CR
•
Local Echo = OFF
When the user-supplied terminal emulator program is configured correctly, upon power-up of the CDM-840, the CDM-840 Serial
Interface Info Screen appears, followed by the CDM-840> command prompt. From here, type “help[cr]” or “?[cr]” (without the quotes)
to display the CDM-840 available commands and queries, and to review instructions for using the interface.
Additionally, the CDM-840 also supports the serial command protocol over a Telnet session through the use of a 10/100Base-T
Ethernet connection to the CDM-840. The Ethernet communications interface also supports SNMP protocol, and provides a graphical
user interface (GUI) through web pages that can be accessed using a web browser such as Internet Explorer.
7.2
Remote Commands and Queries Overview
7.2.1
Basic Protocol
In an EIA-232 configuration, the Controller device is connected directly to the Target device via a two wire-plus-ground connection. All
data is transmitted in framed packets as asynchronous serial characters, suitable for transmission and reception to the Controller using a
universal asynchronous receiver/transmitter (UART). 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:
•
Controller-to-Target: The Controller device (e.g., the user PC via the CDM-840 Serial Interface) is used to transmit instructions
(commands) to – or to request information from (queries) – the Target device (i.e., the CDM-840).
•
Target-to-Controller: The Target, in return, only transmits response information to the Controller when specifically directed by
the Controller.
For Serial Remote Control, all issued commands (Controller-to-Target) require a response (Target-to-Controller). This response is
either to return data that has been queried by the Controller, or to confirm the Target’s receipt of a command to change the Target’s
configuration.
7–3
CDM-840 Remote Router
Serial-based Remote Product Management
7.2.2
Revision 2
MN-CDM840
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 (Issued Command or Query)
Start of Packet
Target Address
Address Delimiter
<
ASCII code 60
0000 (default)
/
ASCII code 47
(4 characters)
(1 character)
(1 character)
Packet Example:
Instruction Code
Code Qualifier
Optional Arguments
= or ?
ASCII codes 61 or 63
(3 characters)
(1 character)
End of Packet
Carriage Return
ASCII code 13
(n characters)
(1 character)
Optional Arguments
End of Packet
<0000/BFR=1[cr]
Target-to-Controller (Response to Command or Query)
Start of Packet
Target Address
Address Delimiter
>
ASCII code 62
0000 (default)
/
ASCII code 47
(1 character)
(4 characters)
(1 character)
Packet Example:
Instruction Code
= or ?
ASCII codes 61 or 63
(3 characters)
>0000/BFR=1[cr][lf]
Detailed description of the packet components follow.
7.2.2.1
Code Qualifier
Start of Packet
•
Controller-to-Target: This is the character ‘<’ (ASCII code 60).
•
Target-to-Controller: This is the character ‘>’ (ASCII code 62).
7–4
(1 character)
Carriage Return
ASCII code 13
(n characters)
(1 character)
CDM-840 Remote Router
Serial-based Remote Product Management
Revision 2
MN-CDM840
The ‘<’ and ‘>’ characters indicate the start of packet. They may not appear anywhere else within the body of the message.
7.2.2.2
Target Address
Up to 9,999 devices can be uniquely addressed. In both EIA-232 applications, the permissible range of values is 1 to 9999. The target
addess is programmed into a target unit using the remote control port.
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
7.2.2.3
Address Delimiter
This is the “forward slash” character '/ ' (ASCII code 47).
7.2.2.4
Instruction Code
With the exception of the PING command (see Sect. 6.3.12), this is a three-character alphabetic sequence that identifies the message
subject.
Wherever possible, each instruction code is named to serve as a mnemonic for its intended operation – e.g., MLC for Management Link
Configuration, IPA for Management IP Address, 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’ to ‘Z’, ASCII codes 65 - 90).
7–5
CDM-840 Remote Router
Serial-based Remote Product Management
7.2.2.5
Revision 2
MN-CDM840
Instruction Code Qualifier
This is a single character that further qualifies the preceding instruction code. Code Qualifiers obey the following rules:
Controller-to-Target, the only permitted characters are:
Character
Definition
=
(ASCII code 61)
This character is used as the Assignment Operator (AO). It establishes that the Instruction Code that precedes it is to be used as a
command to assign or configure operation. T he instruction set that follows serves to assign the Target’s new parameter setting or
operational value.
Example: In a m essage f rom C ontroller-to-Target, I G1= aaa.bbb.ccc.ddd/yy means “ set t he G E P ort I P addr ess t o
aaa.bbb.ccc.ddd/yy”
?
(ASCII code 63)
This character is used as the Query Operator (QO). It establishes that the Instruction Code that precedes it is to be used as a query
that returns the Target’s current configured parameter setting or operational value.
Example: From Controller-to-Target, IG1? means “what’s the current GE Port IP address?”
Target-to-Controller, the only permitted characters are:
Character
Definition
=
(ASCII code 61)
This character is used in two ways:
a. If the Controller sends a query to the Target – for example, IG1? (meaning “what’s current GE Port IP address?”) – the Target
responds with IG1= aaa.bbb.ccc.ddd/yy, the value for that queried parameter.
b. If the Controller sends an instruction to set a parameter to a particular value, and the value sent is valid, the Target acknowledges
the message and responds with IG1= (with no message arguments).
?
(ASCII code 63)
If the Controller sends an instruction to set a parameter to a particular value, and the value sent is not valid, the Target then
acknowledges the message and responds with, for example, SRC? (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 that the Target does not recognize, the Target responds by echoing the invalid instruction,
followed by !
Example: ABC!
7–6
CDM-840 Remote Router
Serial-based Remote Product Management
7.2.2.6
Revision 2
MN-CDM840
Character
Definition
*
(ASCII code 42)
If the Controller sends the command to set a parameter to a particular value, and the value sent is valid BUT the router will not permit
that particular parameter to be changed at present, the Target acknowledges the message and responds with, for example, MLC* (with
message arguments).
#
(ASCII code 35)
If the Controller sends a correctly formatted command, BUT the unit is not in Remote Mode, it does not allow reconfiguration and
responds, for example, with MLC#.
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).
7.2.2.7
End of Packet
•
Controller-to-Target: This is the ‘Carriage Return’ ([CR]) character (ASCII code 13).
•
Target-to-Controller: This is the two-character sequence ‘Carriage Return’, ‘Line Feed’ ([cr][lf]) (ASCII codes 13 and 10). Both
indicate the valid termination of a packet.
7–7
CDM-840 Remote Router
Serial-based Remote Product Management
7.3
7.3.1
Revision 2
MN-CDM840
Remote Commands and Queries
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.
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 a local ODU
Sect. 6.3.2 Transmit (Tx) Parameters Commands and Queries
CODE
TAR
TDR
TFQ
C
Q
X
X
X
X
X
PAGE
6-12
6-11
6-11
CODE
TMC
TPL
TSI
C
Q
X
X
X
X
X
X
PAGE
6-12
6-11
6-12
CODE
TSR
TXO
VFQ
C
Q
X
X
X
X
X
Sect. 6.3.3 Receive (Rx) Parameters Commands and Queries
CODE
RFQ
RGS
RMC
C
Q
X
X
X
X
X
PAGE
6-13
6-14
6-13
CODE
RSI
RSR
C
X
Q
X
X
PAGE
6-14
6-13
Sect. 6.3.4 Demodulator Parameters Commands and Queries
CODE
ESN
RSL
C
Q
X
X
PAGE
6-15
6-15
CODE
C
Q
PAGE
7–8
PAGE
6-11
6-11
6-12
CDM-840 Remote Router
Serial-based Remote Product Management
Revision 2
MN-CDM840
Sect. 6.3.5 Transmit (Tx) BERT Command or Query
CODE
BTX
C
Q
X
X
PAGE
6-16
Sect. 6.3.6 Receive (Rx) BERT Command or Query
CODE
BRX
C
Q
X
X
PAGE
6-16
Sect. 6.3.7 BUC (Block Upconverter) Parameters Commands and Queries
CODE
BCH
BCL
BDC
C
Q
X
X
X
X
X
PAGE
6-17
6-17
6-17
CODE
BDV
BFR
BPS
C
X
X
Q
X
X
X
PAGE
6-17
6-17
6-17
CODE
C
Q
PAGE
Sect. 6.3.8 LNB (Low Noise Block Downconverter) Parameters Commands and Queries
CODE
LNC
LNH
LNL
C
Q
X
X
X
X
X
PAGE
6-18
6-18
6-18
CODE
LNR
LPS
LVO
C
X
X
Q
X
X
X
PAGE
6-18
6-18
6-18
CODE
C
Q
PAGE
CODE
MAC
MG1
MLC
NPS
C
Q
X
X
X
X
PAGE
6-25
6-25
6-24
6-24
X
6-26
Sect. 6.3.9 Unit Parameters Commands and Queries
CODE
ADJ
CID
DPW
EID
FLT
FRW
C
Q
X
X
X
X
X
X
X
X
PAGE
6-23
6-23
6-25
6-19
6-22
6-21
CODE
GLG
IG1
IMG
IPA
LC1
C
X
X
X
X
Q
X
X
X
X
PAGE
6-25
6-23
6-21
6-24
6-24
REN
Sect. 6.3.10 Bulk Configuration String Commands
CODE
CLD
CST
C
X
X
Q
PAGE
6-27
6-27
7–9
X
CODE
SBS
SNO
SRC
SSN
SWC
SWR
C
X
X
X
X
Q
X
X
X
X
X
X
PAGE
6-22
6-23
6-26
6-23
6-26
6-21
CODE
TST
C
Q
X
X
PAGE
6-23
CDM-840 Remote Router
Serial-based Remote Product Management
Revision 2
MN-CDM840
Sect. 6.3.11 Redundancy Commands and Queries
CODE
FSW
RED
C
Q
X
X
PAGE
6-27
6-27
Sect. 6.3.12 Miscellaneous Utility Commands
CODE
PING
C
Q
X
X
PAGE
6-28
CODE
C
Q
PAGE
7–10
CDM-840 Remote Router
Serial-based Remote Product Management
7.3.2
Parameter
Type
Tx
Frequency
Tx Data
Rate
Revision 2
MN-CDM840
Transmit (Tx) Parameters Commands and Queries
Command
(Instruction
Code
& Qualifier)
TFQ
N/A
Number of
Arguments for
Command or
Response to Query
9 bytes
10 bytes
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Command or Query.
Sets or returns Tx Frequency in the form xxxx.xxxx , where:
Range = 950.0000 to 2150.0000 MHz (L-Band)
Resolution=100Hz
Example: <1/TFQ=0950.9872’cr’
Query only.
Returns Tx Data Rate in the form dddddd.ddd, where:
dddddd.ddd = Tx Data Rate in kbps, from 16 kbps to 16.00 Mbps
Resolution=1 bps
Response to
Command
(Target to
Controller)
TFQ=
TFQ?
TFQ *
TFQ#
Query
(Instruction
Code &
Qualifier)
TFQ?
TDR =
TDR?
TDR *
TDR?
TDR=xxxxxx.xxx
(see Description of
Arguments)
TSR=
TSR?
TSR*
TSR#
TSR?
TSR=dddddd.ddd
(see Description of
Arguments)
TXO=
TXO?
TXO*
TXO#
TXO?
TXO=x
(see Description of
Arguments)
TPL=
TPL?
TPL*
TPL#
TPL?
TPL=sxx.x
(see Description of
Arguments)
Response to Query
(Target to Controller)
TFQ =xxxx.xxxx
(see Description of
Arguments)
Example: <1/TDR?’cr’
Tx Symbol
Rate
TSR=
10 bytes
Tx Carrier
State
TXO=
1 byte
Tx Power
Level
TPL=
4 bytes
Note: The corresponding data rate will be automatically updated as per the
CCM MODCOD or the MODCOD currently being received.
Command or Query.
Sets or returns Tx Symbol Rate in the form dddddd.ddd, where:
dddddd.ddd = Tx Symbol Rate in ksps, from 16ksps to 4.5Msps
Example: <1/TSR=002047.999’cr’
Command or Query.
Sets or returns Tx Carrier State in the form x, where:
0=Off
1=On
Example: <1/TXO=1’cr’
Command or Query.
Sets or returns Tx Power Level in the form sxx.x, where:
s = sign [– (negative) or + (positive)]
xx.x = power value
Tx Output power level for 950 to 2150MHz range is from 0 to -40 dBm.
Example: <1/TPL=-13.4’cr’
7–11
CDM-840 Remote Router
Serial-based Remote Product Management
Parameter
Type
Tx
MODCOD
Command
(Instruction
Code
& Qualifier)
TMC=
Number of
Arguments for
Command or
Response to Query
2 bytes
Revision 2
MN-CDM840
Response to
Command
(Target to
Controller)
TMC=
TMC?
TMC*
TMC#
Query
(Instruction
Code &
Qualifier)
TMC?
TSI=
TSI?
TSI*
TSI#
TSI?
TSI=x
(see Description of
Arguments)
Example: <1/TSI =0’cr’
Command or Query.
Sets or returns Tx Rolloff slope in the form x, where:
0=20%
1=25%
2=35%
TAR =
TAR?
TAR *
TAR #
TAR?
TAR =x
(see Description of
Arguments)
Example: <1/TAR=2’cr’
Query only.
Returns VMS Frequency in the form xxxx.xxxx, where:
Range = 950.0000 to 2150.0000 MHz
Resolution=100Hz
VFQ =
VFQ?
VFQ*
VFQ?
VFQ =xxxx.xxxx
(see Description of
Arguments)
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Command or Query.
Sets or returns Tx Modulation in the form xx, where:
0=BPSK 0.488
1=QPSK 0.533
2=QPSK 0.631
3=QPSK 0.706
4=QPSK 0.803
5=8-QAM 0.642
6=8-QAM 0.711
7=8-QAM 0.780
8=16-QAM 0.731
9=16-QAM 0.780
10=16-QAM 0.829
11=16-QAM 0.853
12=reserved (auto)
Response to Query
(Target to Controller)
TMC=xx
(see Description of
Arguments)
All other codes are invalid.
Tx
Spectrum
Invert
TSI=
1 byte
Tx Rolloff
TAR=
1 byte
VMS
Frequency
N/A
9 bytes
Example: <1/TMC=6’cr’
Command or Query.
Sets or returns Tx Spectrum invert in the form x, where:
0=normal
1=inverted
Example: <1/VFQ?’cr’
7–12
CDM-840 Remote Router
Serial-based Remote Product Management
7.3.3
Parameter
Type
Rx
Frequency
Rx Symbol
Rate
Rx
MODCOD
Revision 2
MN-CDM840
Receive (Rx) Parameters Commands and Queries
Command
(Instruction
Code
& Qualifier)
RFQ=
RSR=
N/A
Number of
Arguments for
Command or
Response to Query
10bytes
10 bytes
2 bytes
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Command or Query.
Sets or returns Rx Terminal Frequency (the frequency (MHz) being received
from the satellite) in the form xxxxx.xxxx, where:
xxxxx.xxxx = 950.0000 MHz to 65000.0000 MHz (L-Band)
Resolution=100Hz.
Examples:
• If RX LO is 00000, then the Rx Frequency is entered as L-Band direct –
950.0000 to 2150.0000;
• If RX LO is set in the range of 30000 to 65000, the Rx Frequency is ± the
Rx LO, and this will be the resulting L-Band frequency the modem will
expect to receive.
Command or Query.
Sets or returns Rx Symbol Rate in the form dddddd.ddd, where:
dddddd.ddd = Tx Symbol Rate in ksps, from 16ksps to 4.5Msps
Example: <1/RSR =002047.999’cr’
Query only.
Returns Rx Demodulationall in the form xx, where:
0=reserved
1=QPSK 1/4
2=QPSK 1/3
3=QPSK 2/5
4=QPSK 1/2
5=QPSK 3/5
6=QPSK 2/3
7=QPSK ¾
8=QPSK 4/5
9=QPSK 5/6
10=QPSK 8/9
11=QPSK 9/10
12=8PSK 3/5
13=8PSK 2/3
14=8PSK 3/4
15=8PSK 5/6
16=8PSK 8/9
17=8PSK 9/10
7–13
Response to
Command
(Target to
Controller)
RFQ=
RFQ?
RFQ*
RFQ#
Query
(Instruction
Code &
Qualifier)
RFQ?
RSR =
RSR?
RSR *
RSR #
RSR?
RSR =dddddd.ddd
(see Description of
Arguments)
RMC?
RMC*
RMC#
RMC?
RMC=xx
(see Description of
Arguments)
Response to Query
(Target to Controller)
RFQ=xxxxx.xxxx
(see Description of
Arguments)
CDM-840 Remote Router
Serial-based Remote Product Management
Parameter
Type
Command
(Instruction
Code
& Qualifier)
Number of
Arguments for
Command or
Response to Query
Rx
MODCOD
(cont.)
Revision 2
MN-CDM840
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Response to
Command
(Target to
Controller)
Query
(Instruction
Code &
Qualifier)
Response to Query
(Target to Controller)
18=16-APSK 2/3
19=16-APSK 3/4
20=16-APSK 4/5
21=16-APSK 5/6
22=16-APSK 8/9
23=16-APSK 9/10
24=32-APSK ¾
25=32-APSK 4/5
26=32-APSK 5/6
27=32-APSK 8/9
28=32-APSK 9/10
29=reserved
30=reserved
31=reserved
32=auto (future - ACM only)
All other codes are invalid.
Rx Gold
Code
Sequence
Index
N/A
Rx
Spectrum
Invert
N/A
6 bytes
Example: <0/RMC=6’cr’
Command or Query.
Note: Only valid in DVB-S2 mode.
Sets or returns Rx Gold Code Sequence Index in the form xxxxxx, where:
xxxxxx = Gold Code Sequence index ( 0 to 262141 )
1 byte
Example: <1/RGS=189063’cr’
Query only.
Returns Rx Spectrum Invert in the form x, where:
0=Normal
1=Rx Spectrum Inverted
Example: <0/RSI?’cr’
7–14
RGS=
RGS?
RGS*
RGS#
RGS?
RGS=xxxxxx
RSI?
RSI*
RSI#
RSI?
RSI=x
(see Description of
Arguments)
CDM-840 Remote Router
Serial-based Remote Product Management
7.3.4
Parameter
Type
Rx Signal
Level
Revision 2
MN-CDM840
Demodulator Status Commands and Queries
Command
(Instruction
Code
& Qualifier)
N/A
Number of
Arguments for
Command or
Response to Query
5 bytes
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Query only.
Returns the value of the Rx signal level, in dBm, from -25 to
-55 dBm with a tolerance of ±5 dBm. Resolution = 0.5dB.
Response to
Command
(Target to
Controller)
N/A
Query
(Instruction
Code &
Qualifier)
RSL?
N/A
ESN?
Response to Query
(Target to Controller)
RSL=xxxxx
(see description
of Arguments)
Note the following:
If in the range of -25 to -55dBm, returns RSL=-xx.y
If >-25dBm, returns SL1=GT-25 (GT = ‘greater than’)
If <-55 dBm, returns SL1=LT-55 (LT = ‘less than’)
Rx Es/No
N/A
4 bytes
Example: <1/RSL?’cr’
Query only.
Returns the value of Es/No in the form xx.x, where:
xx.x = valuefrom -1 to -40 dB.
Negative sign (-) is implied.
Resolution = 0.1 dB.
Returns 99.9 if demod is unlocked.
Returns +040 for values greater than -40.0 dB.
The Es/No number correspond to the value that is displayed on HTTP (virtual
front panel) or SNMP. This value is averaged in the background for the
previous 16 values.
For a faster Es/No reading use REN command.
Example: <1/EBN?’cr’
7–15
ESN=xxxxx
(see Description of
Arguments)
CDM-840 Remote Router
Serial-based Remote Product Management
7.3.5
Parameter
Type
Tx BERT
State
Revision 2
MN-CDM840
Transmit (Tx) BERT Command or Query
Command
(Instruction
Code
& Qualifier)
BTX=
Number of
Arguments for
Command or
Response to Query
1 byte
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Command or Query.
Sets or returns Tx BERT State in the form x, where:
0=Off
1=On
Response to
Command
(Target to
Controller)
BTX=
BTX?
BTX#
Query
(Instruction
Code &
Qualifier)
BTX?
Response to
Command
(Target to
Controller)
BRX =
BRX?
BRX *
BRX #
Query
(Instruction
Code &
Qualifier)
BRX?
Response to Query
(Target to Controller)
BTX=x
(see Description of
Arguments)
Example: <1/BTX=1’cr’
7.3.6
Parameter
Type
Rx BERT
State
Receive (Rx) BERT Command or Query
Command
(Instruction
Code
& Qualifier)
BRX=
Number of
Arguments for
Command or
Response to Query
1 byte
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Command and Query
Sets or returns Rx BERT state in the form x, where:
0 = off
1 = on
Example: <1/BRX=1’cr’
7–16
Response to Query
(Target to Controller)
BRX=x
(see description of
arguments)
CDM-840 Remote Router
Serial-based Remote Product Management
7.3.7
Parameter
Type
BUC Power
Supply
enable
BUC 10
MHz
Reference
Revision 2
MN-CDM840
BUC (Block Upconverter) Parameters Commands and Queries
Command
(Instruction
Code
& Qualifier)
BPS=
Number of
Arguments for
Command or
Response to Query
1 byte
BFR=
1 byte
Command or Query.
Sets or returns the BUC Power Supply control in the form x, where:
0=Disable
1=Enable
Response to
Command
(Target to
Controller)
BPS=
BPS?
BPS*
BPS#
Query
(Instruction
Code &
Qualifier)
BPS?
Example: <1/BPS=1’cr’
Command or Query.
Sets or returns the BUC 10 MHz Reference control in the form x, where:
0=Off
1=On
BFR=
BFR?
BFR*
BFR#
BFR?
BFR=x
(see Description of
Arguments)
BCL=
BCL?
BCL*
BCL#
BCL?
BCL=xxxx
(see Description of
Arguments)
BCH=
BCH?
BCH*
BCH#
BCH?
BCH=xxxx
(see Description of
Arguments)
N/A
BDC?
BDC=xxxx
(see Description of
Arguments)
N/A
BDV?
BDV=xx.x
(see Description of
Arguments)
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
BUC
BCL=
Current Low
Limit
4 bytes
Example: <1/BFR=1’cr’
Command or Query.
Sets or returns the BUC Current Low Limit in the form xxxx, where:
xxxx = a value from 0 to 4000mA, in 100mA increments.
BUC
Current
High Limit
4 bytes
Example: <1/BCL=1200’cr’
Command or Query.
Sets or returns the BUC Current High Limit in the form xxxx, where:
xxxx = a value from 0 to 4000mA, in 100mA increments
BCH=
BUC DC
Current
N/A
4 bytes
BUC
Voltage
N/A
4 bytes
Example: <1/BCH=2300’cr’
Query only.
Returns the value of the BUC DC current in the form xxxx, where:
xxxx = a value, in mA, from 0 to 9999.
If not available, response is 0000.
Example: <1/BDC?’cr’
Query only.
Returns the value of the BUC Voltage in the form xx.x, where:
xx.x = a value, in volts, from 0 to 64.0
Example: <1/BDV?’cr’
7–17
Response to Query
(Target to Controller)
BPS=x
(see Description of
Arguments)
CDM-840 Remote Router
Serial-based Remote Product Management
7.3.8
Revision 2
MN-CDM840
LNB (Low-Noise Block Downconverter) Parameters Commands and Queries
Command
(Instruction
Code
& Qualifier)
LNB Current LNH=
High
Limit
Parameter
Type
Number of
Arguments for
Command or
Response to Query
3 bytes
Response to
Command
(Target to
Controller)
LNH=
LNH?
LNH*
LNH#
Query
(Instruction
Code &
Qualifier)
LNH?
LNL =
LNL?
LNL *
LNL #
LNL?
LNL =xxx
(see Description of
Arguments)
LNR=
LNR?
LNR*
LNR#
LNR?
LNR=x
(see Description of
Arguments)
Example: <1/LNR=1’cr’
Command or Query
Sets or returns the LNB DC Power Supply Control in the form x, where:
0 = Off
1 = 13V LNB Voltage
2 = 18V LNB Voltage
3 = 24V LNB Voltage
LPS=
LPS?
LPS*
LPS#
LPS?
LPS=x
(see Description of
Arguments)
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Command or Query.
Sets or returns the current high limit value in the form xxx, where:
xxx = current high limit value from 0 to 500 mA.
Example: <1/LNH=123’cr’
Command or Query.
Sets or returns the current low limit value in the form xxx, where:
xxx = current low limit value from 0 to 500 mA.
Response to Query
(Target to Controller)
LNH=xxx
(see Description of
Arguments)
LNB Current LNL=
Low
Limit
3 bytes
LNB
Reference
Enable
LNR=
1 byte
LNB DC
Power
Control
LPS=
1 byte
LNB
Voltage
N/A
4 bytes
Example: <1/LPS=3’cr’
Query only.
Returns the LNB voltage value in volts
N/A
LVO?
LNB Current N/A
4 bytes
Example: <1/LVO?’cr’
Query only.
Returns ther LNB current value in mA.
LVO=xxxx
(see Description of
Arguments)
N/A
LNC?
LNC=xxxx
(see Description of
Arguments)
Example: <1/LNL=123’cr’
Command or Query.
Sets or returns the LNB Reference Enable in the form x, where:
0=Disable
1=Enable
Example: <1/LNC?’cr’
7–18
CDM-840 Remote Router
Serial-based Remote Product Management
7.3.9
Unit Parameters Commands and Queries
Command
Number of
(Instruction
Arguments for
Code
Command or
& Qualifier) Response to Query
Equipment ID N/A
37 bytes
Parameter
Type
Revision 2
MN-CDM840
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Query only.
Returns the equipment ID and installed options, where:
AAAA= The modem model number, i.e, 0840
ssss (4 spares)= Installed hardware = 0000
Software FAST options
B= Tx Data/Symbol Rate option:
0= Standard: CCM 16kbps to 256kbps
1= CCM 16kbps to 512bps
2= CCM 16kbps to 1024kbps
3= CCM 16kbps to 2048kbps
4= CCM 16kbps to 5Mbps
5= CCM 16kbps to 10Mbps
6= CCM 16kbps to 15Mbps
7= ACM 37ksps to 100ksps (future)
8= ACM 37ksps to 200ksps (future)
9= ACM 37ksps to 400ksps (future)
A= ACM 37ksps to 800ksps (future)
B= ACM 37ksps to 1200ksps (future)
C= ACM 37ksps to 2400ksps (future)
D= CCM 37ksps to 4100 ksps (future)
C= Rx Data/Symbol Rate option:
0= Standard: CCM 1Mbps to 15Mbps
1= CCM 1Mbps to 45Mbps
2= CCM 1Mbps to 100Mbps
3= CCM 1Mbps to 140Mbps
4= CCM 1Mbps to 167Mbps
5= ACM 1Msps to 5Msps future
6= ACM 1Msps to 15Msps future
7= ACM 1Msps to 34Msps future
8= ACM 1Msps to 47Msps future
9= ACM 1Msps to 62Msps future
7–19
Response to
Command
(Target to
Controller)
N/A
Query
(Instruction
Code &
Qualifier)
EID?
Response to Query
(Target to Controller)
EID=AAAAssssBCDEFGHIJ
Ksssssssssssssssssss
(see Description of
Arguments)
CDM-840 Remote Router
Serial-based Remote Product Management
Parameter
Type
Equipment ID
(cont.)
Command
(Instruction
Code
& Qualifier)
Number of
Arguments for
Command or
Response to Query
Revision 2
MN-CDM840
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
D=E1 Interface – WAN Adaptation:
0= None
1= 1 TRX (up to 3 DSO can be selected)
2= 2 TRX (up to 6 DSO can be selected)
3= 3 TRX (up to 9 DSO can be selected)
4= 6 TRX (up to 18 DSO can be selected)
5= 9 TRX (up to 27 DSO can be selected)
6= 9+ TRX / Full E1 (up to 32 DSO can be selected)
E=Header Compression Tx Data Rate (CCM)/ Symbol Rate (ACM):
0= None
1= up to 256 kbps (CCM) / 100 ksps (ACM)
2= up to 512 kbps (CCM) / 200 ksps (ACM)
3= up to 1024 kbps (CCM) / 400 ksps (ACM)
4= up to 2048 kbps (CCM) / 800 ksps (ACM)
5= up to 5 Mbps (CCM) / 1200 ksps (ACM)
6= up to 10 Mbps (CCM) / 2400 ksps (ACM)
7= up to 15 Mbps (CCM) / 4100 ksps (ACM)
F=Header Decompression Rx Data Rate (CCM)/ Symbol Rate (ACM):
0= None
1= up to 15 Mbps (CCM) / 5 Msps (ACM)
2= up to 45 Mbps (CCM) / 15 Msps (ACM)
3= up to 100 Mbps (CCM) / 34 Msps (ACM)
4= up to 140 Mbps (CCM) / 47 Msps (ACM)
5= up to 167 Mbps (CCM) / 62 Msps (ACM)
G=Payload Compression Tx Data Rate (CCM)/ Symbol Rate (ACM):
0= None
1= up to 256 kbps (CCM) / 100 ksps (ACM)
2= up to 512 kbps (CCM) / 200 ksps (ACM)
3= up to 1024 kbps (CCM) / 400 ksps (ACM)
4= up to 2048 kbps (CCM) / 800 ksps (ACM)
5= up to 5 Mbps (CCM) / 1200 ksps (ACM)
6= up to 10 Mbps (CCM) / 2400 ksps (ACM)
7= up to 15 Mbps (CCM) / 4100 ksps (ACM)
H=Payload Decompression Rx Data Rate (CCM)/ Symbol Rate (ACM):
0= None
1= up to 15 Mbps (CCM) / 5 Msps (ACM)
2= up to 45 Mbps (CCM) / 15 Msps (ACM)
3= up to 100 Mbps (CCM) / 34 Msps (ACM)
4= up to 140 Mbps (CCM) / 47 Msps (ACM)
5= up to 167 Mbps (CCM) / 62 Msps (ACM)
7–20
Response to
Command
(Target to
Controller)
Query
(Instruction
Code &
Qualifier)
Response to Query
(Target to Controller)
CDM-840 Remote Router
Serial-based Remote Product Management
Parameter
Type
Command
(Instruction
Code
& Qualifier)
Number of
Arguments for
Command or
Response to Query
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Response to
Command
(Target to
Controller)
Query
(Instruction
Code &
Qualifier)
Response to Query
(Target to Controller)
I = Quality of Service
0= None
1= Basic Qos (Diffserv + SAR)
2= Advanced Qos (Basic Qos + Rule Based Qos)
J = G.702 Clock Extension
0= None
1= Enabled
K = Dynamic SCPC
0= None
1= Enabled
sssssssssssssssssss (19 spares)
Equipment ID
(cont.)
Current
Software
Image
Revision 2
MN-CDM840
N/A
1 byte
Firmware
information
N/A
100 bytes
Software
Revision
N/A
8 bytes
Example: <1/EID?’cr’
Query Only.
Returns active software image in the form x, where:
1=Bulk Image #1 currently active
2=Bulk Image #2 currently active
Example: <1/IMG?’cr’
Query only.
Returns firmware information for Image 0, 1 or 2, where:
0 = Bootrom Information
1 = Image #1 Firmware Information
2 = Image #2 Firmware Information
The information return in the form xxxxx…,mm/dd/yy where:
xxxxx…: The firmware number
mm/dd/yy: The firmware date in month/date/year
Example: <0/FRW?1’cr’
Query only.
Returns the value of the internal software revision installed in the unit, in the
form of xx.xx.xx
Example: <0/SWR?’cr’
7–21
N/A
IMG?
IMG=x
(see Description of
Arguments)
N/A
FRW?0
FRW?1
FRW?2
FRW= xxxxx…,mm/dd/yy
(see Description of
Arguments)
N/A
SWR?
SWR=xx.xx.xx
(see description
of Arguments)
CDM-840 Remote Router
Serial-based Remote Product Management
Parameter
Type
Faults and
Status
Software
Boot From
Slot
Command
Number of
(Instruction
Arguments for
Code
Command or
& Qualifier) Response to Query
N/A
16 bytes
SBS=
1 byte
Revision 2
MN-CDM840
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Query only.
Returns the current highest-priority fault and status codes for the Unit (hardware),
TX Traffic, RX Traffic, and ODUs in the form abcdefxxxxxxxxxx, where:
a = Unit status:
0=No faults
1=Power supply fault, +5 volts
2=Power supply fault , +12 volts
3=Tx synthesizer unlocked
4=Tx/Rx FPGA PLL unlocked
5=Tx/Rx FPGA load fail
6=Compression FPGA load fail
b = Tx Traffic status:
0=Tx traffic OK
c = Rx Traffic status:
0=Rx Traffic OK
1=Demodulator unlocked
2=Es/No Alarm
d = BUC status/faults:
0=BUC OK
1=BUC Current
2=BUC Voltage
e = LNB status/faults:
0 = OK, masked or not present
1 = LNB current
2 = LNB voltage
f = Traffic/GE Interface Fault (reports as Unit Fault)
0 = OK
1 = No Link
sssssssssssssssssss (10 spares)
Example: <0/FLT?’cr’
Command or Query.
Selects which bulk firmware slot to boot from in the form x, where:
0=Latest Firmware (most recent date)
1=Firmware is Slot #1
2=Firmware is Slot #2
Example: <1/SBS=1’cr’
7–22
Response to
Command
(Target to
Controller)
N/A
Query
(Instruction
Code &
Qualifier)
FLT?
SBS=
SBS?
SBS*
SBS#
SBS?
Response to Query
(Target to Controller)
FLT= abcdefxxxxxxxxxx
(see Description of
Arguments)
SBS=x
(see Description of
Arguments)
CDM-840 Remote Router
Serial-based Remote Product Management
Parameter
Type
SNMP
Unit Name
Command
Number of
(Instruction
Arguments for
Code
Command or
& Qualifier) Response to Query
SSN=
16 bytes
Revision 2
MN-CDM840
Response to
Command
(Target to
Controller)
SSN =
SSN!
Query
(Instruction
Code &
Qualifier)
SSN?
Note: If not configured it returns empty string
Query only.
Returns the 9-digit serial number.
N/A
SNO?
Example: <1/SNO?’cr’
Command or Query.
Sets or returns the fine adjustment of the Internal 10MHz Reference on the
High-Stability Frequency Reference module in the form sddd, where:
s= sign [– (negative) or + (positive)]
ddd= value, 0-999.
SNO=xxxxxxxxx
(see Description of
Arguments)
ADJ=
ADJ?
ADJ*
ADJ#
ADJ?
ADJ=sddd
(see Description of
Arguments)
CID=
CID?
CID*
CID#
CID?
CID=x [4..32]
(see Description of
Arguments)
Example: <1/CID=RxCircuitID’cr’
Command or Query.
Sets or returns Unit Test Mode in the form x, where:
0=Normal Mode (no test)
1=Tx CW
2=Tx Alternating 1,0 Pattern
3 = QPSK PN Pattern
TST=
TST?
TST*
TST#
TST?
TST=x
(see Description of
Arguments)
Example: <1/TST=1’cr’
Command or Query.
Sets or returns the IP address and network prefix for the 10/100 BaseT
Ethernet Traffic port, in the form xxx.xxx.xxx.xxx/yy, where:
xxx.xxx.xxx.xxx is the IP address, and
yy is the network prefix (8-30)
IG1=
IG1?
IG1*
IG1#
IG1?
IG1= xx.xxx.xxx.xxx/yy (See
description of arguments)
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Command or Query.
Sets or returns the SNMP System Name string
Example: <1/SSN=Remote1.
Serial
Number
N/A
9 bytes
Adjustment
for Internal
10MHz Highstability
Reference
ADJ=
4 bytes
Circuit ID
String
CID=
4 to 32 bytes
Unit Test
Mode
TST=
1 byte
Traffic IP
IG1=
18 bytes
Example: <1/ADJ=-123’cr’
Command or Query.
Sets or returns the user-defined Circuit ID string, which is 4 to 32 characters in
length. Valid characters include:
Space ( ) * + – , . / 0 9 and A thru Z
Example: <1/IG1=192.168.001.004/24’cr’
7–23
Response to Query
(Target to Controller)
SSN =x [1..16]
(see Description of
Arguments)
CDM-840 Remote Router
Serial-based Remote Product Management
Parameter
Type
GE Link
Configuration
Command
Number of
(Instruction
Arguments for
Code
Command or
& Qualifier) Response to Query
LC1=
1 byte
Actual
Negotiated
Port Speed
N/A
None
Management
IP Address
IPA=
18 bytes
Management
Link
Configuration
MLC=
1 byte
Revision 2
MN-CDM840
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Command or Query.
Sets or returns GE Interface mode in the form x, where:
0=Auto Negotiate
1=1000Mbps -Full Duplex
2=100Mbps – Full Duplex
3=100Mbps – Half Duplex
4=10Mbps – Full Duplex
5=10Mbps – Half Duplex
Example: <1/LC1=3’cr’
Query only.
Returns actual negotiated port speed in the form ab, where:
a = GE1 negotiated port speed.
b = management port negotiated port speed.
a, b have the following values:
0 = Link down
1=100 Full
2=100 Half
3=10 Full
4=10 Half
5=1000 Full
Example: <1/NPS?’cr’
Command or Query.
Sets or returns set the IP address and network prefix for the 10/100 BaseT
Ethernet management port, in the form xxx.xxx.xxx.xxx/yy, where:
xxx.xxx.xxx.xxx is the IP address, and
yy is the network prefix (8-30)
Example: <1/IPG=192.168.001.004/24’cr’
Command or Query.
Sets or returns Management Interface mode in the form x, where:
0=Auto Negotiate
1=reserved
2=100Mbps – Full Duplex
3=100Mbps – Half Duplex
4=10Mbps – Full Duplex
5=10Mbps – Half Duplex
Example: <1/MLC=3’cr’
7–24
Response to
Command
(Target to
Controller)
LC1=
LC1?
LC1*
LC1#
Query
(Instruction
Code &
Qualifier)
LC1?
N/A
NPS?
NPS=ab
(see Description of
Arguments)
IPA=
IPA?
IPA*
IPA#
IPA?
IPA= xx.xxx.xxx.xxx/yy (See
description of arguments)
MLC =
MLC?
MLC *
MLC #
MLC?
MLC =x
(see Description of
Arguments)
Response to Query
(Target to Controller)
LC1=x
(see Description of
Arguments)
CDM-840 Remote Router
Serial-based Remote Product Management
Command
(Instruction
Code
& Qualifier)
Number of
Arguments for
Command or
Response to Query
Default
Passwords
DPW=
N/A
Geographical
Log
Information
GLG=
18 bytes
Management
MAC Address
N/A
12 bytes, alphanumerical
GE MAC
Address
N/A
12 bytes, alphanumerical
Parameter
Type
Revision 2
MN-CDM840
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Command Only.
Resets the admin username/password to:
Username = “comtech”
Password = “comtech”
Command Only.
Format is: AAAAOOOOOXNNNNNNNN, where:
A = Latitude,
O = Longitude,
X = exclusion zone status (0 or 1),
N = name of satellite used
Data is stored in the file “GPS.log.” Data in the log file older then one year is
removed from the log file.
The format of the text in the log file is a single GLG command per line:
WWWWSSSSSSSSFFFFFFFFBBBBBBBBMAAAAOOOOONNNNNNNN, where:
W = hex representation of the weeks field (weeks since 1/6/1980)
S = hex representation of the seconds field (seconds this week)
F = hex representation of the tx frequency
B = hex representation of the tx symbol rate
= bitmap for exclusion setting from user, and if we are locked from the router bit 0 =
lock, bit 1 = exclusion bit
A = Latitude from user input
O = Longitude from user input
= String for satellite name (doesn't have to be 8 chars exactly, but can't be more then 8)
Query only.
Returns the unique MAC Address for the router.
Example: MAC=0006B00001C2
Query only.
Returns the unique GE MAC Address.
Example: MG1=0006B00001C2
7–25
Response to
Command
(Target to
Controller)
Query
(Instruction
Code &
Qualifier)
Response to Query
(Target to Controller)
DPW=
DPW?
DPW*
DPW#
GLG=
GLG?
N/A
N/A
N/A
GLG= AAAAOOOOOXN
NNNNNNN
(See Description of
Arguments)
N/A
MAC?
MAC=aabbccddeeff
(see Description of
Arguments)
N/A
MG1?
MG1=aabbccddeeff
(see Description of
Arguments)
CDM-840 Remote Router
Serial-based Remote Product Management
Parameter
Type
Reported
Es/No
Command
(Instruction
Code
& Qualifier)
Number of
Arguments for
Command or
Response to Query
N/A
5 bytes
Revision 2
MN-CDM840
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Query Only.
Returns current Es/No of demodulator where:
s = ‘0’ or ‘-‘ (negative sign, if needed, zero otherwise)
xx.x = value from 00.0 to 35.0 dB.
Resolution = 0.1 dB.
Response to
Command
(Target to
Controller)
Query
(Instruction
Code &
Qualifier)
Response to Query
(Target to Controller)
N/A
REN?
REN=sxx.x
(see Description of
Arguments)
SRC =
SRC!
SRC?
SRC =x
(see Description of
Arguments)
SWC =
SWC!
SWC?
SWC =x
(see Description of
Arguments)
Returns 999 if demod is unlocked.
Returns 35.0 for values greater than 35.0dB.
SNMP Read
Community
SRC=
16 bytes, characters,
no spaces
Note: This query provides a fast Es/No reading that is updated in the background
10 times per second, and is also averaged in the background over the previous 16
returned values.
Command or Query.
SNMP read community string.
Example: <1/SRC=public
SNMP
Write
Community
SWC=
16 bytes,
characters, no
spaces
Note: Empty string is not allowed.
Command or Query.
SNMP write community string.
Example: <1/SWC =public
Note: Empty string is not allowed.
7–26
CDM-840 Remote Router
Serial-based Remote Product Management
7.3.10
Parameter
Type
Configuration
Load
Configuration
Save
Revision 2
MN-CDM840
Bulk Configuration String Commands
Command
Number of
(Instruction
Arguments for
Code
Command or
& Qualifier) Response to Query
CLD=
1 byte
CST=
1 byte
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Command only.
Retrieves a previously stored modem configuration from Configuration Memory
location defined by the one-byte argument (0 to 9).
Example: <1/CLD=4’cr’
Command only.
Stores the current modem configuration in Configuration Memory location
defined by the one-byte argument (0 to 9).
Example: <1/CST=0’cr’
7.3.11
Parameter
Type
Redundancy
State
Force 1:1
Switch
Response to
Command
(Target to
Controller)
CLD=
CLD?
CLD*
CLD#
Query
(Instruction
Code &
Qualifier)
N/A
N/A
CST=
CST?
CST*
CST#
N/A
N/A
Response to
Command
(Target to
Controller)
N/A
Query
(Instruction
Code &
Qualifier)
RED?
FSW=
FSW*
N/A
Response to Query
(Target to Controller)
Redundancy Commands and Queries
Command
Number of
(Instruction
Arguments for
Code
Command or
& Qualifier) Response to Query
N/A
1 byte
FSW=
None
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Query only.
Returns the redundancy state of the unit in the form x, where:
0=Offline
1=Online
Example: <1/RED?’cr’
Command only.
Forces the unit to toggle the Unit Fail relay to the “fail” state for approximately
500ms.
If the unit is a 1:1 pair and it is currently the ‘Online’ unit, this forces a
switchover so the 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.
Example: <1/FSW=’cr’
7–27
Response to Query
(Target to Controller)
RED=x
(see description
of Arguments)
N/A
CDM-840 Remote Router
Serial-based Remote Product Management
7.3.12
Parameter
Type
Revision 2
MN-CDM840
Miscellaneous Utility Commands and Queries
Command
Number of
(Instruction
Arguments for
Code
Command or
& Qualifier) Response to Query
PING
None
Description of Arguments
(Note that all arguments are ASCII numeric codes from 48 and 57)
Command only.
Sending four 64-byte ICMP echo request packets to the host and waiting for
the ICMP response. The host IP address is in the format:
xxx.xxx.xxx.xxx, where:
xxx.xxx.xxx.xxx is the IP address
Example: <1/PING’sp’xxx.xxx.xxx.xxx’cr’
7–28
Response to
Command
(Target to
Controller)
PING =
PING ?
PING *
PING #
Query
(Instruction
Code &
Qualifier)
N/A
Response to Query
(Target to Controller)
N/A
Appendix A. REFERENCE
DOCUMENTATION
This appendix describes features that may be monitored or controlled by the user, or
otherwise processed by the CDM-840 Remote Router. For detailed reading about the
operational features of the Advanced VSAT Series group of products, consult the adjunct
documentation that is specified in this appendix and is available for download from
Comtech EF Data’s web site (www.comtechefdata.com).
Figure A-1. Advanced VSAT Series Hub and Remote Site Products
A–1
CDM-840 Remote Router
Appendix A
A.1
Revision 2
MN-CDM840
FEC (FORWARD ERROR CORRECTION) OPTIONS
The method of FEC used among Comtech EF Data’s Advanced VSAT series of products differs
according to Advanced VSAT Series product.
For the CDM-840 and ODM/R-840 Remote Routers: The FEC method used by the remote site
CDM-840, ODM‐840, and ODMR-840 Remote Routers depends on the direction of signal
processing in use:
•
The receive (Rx) side of the 840 operates with error correction based upon the DVB‐S2
standard for QPSK, 8PSK, 16APSK and 32APSK with concatenated Low Density Parity
Code (LDPC) and Bose‐Chaudhuri‐Hocquenghem (BCH).
•
The transmit (Tx) side of the 840 uses the VersaFEC® family of short‐block LDPC codes.
•
•
Appendix B. FEC (FORWARD ERROR CORRECTION) OPTIONS in this manual
Appendix B. FEC (FORWARD ERROR CORRECTION) OPTIONS in the Comtech EF
Data ODM-840 Outdoor Remote Router / ODMR-840 Reduced Form Factor
Outdoor Remote Router Installation and Operation Manual (CEFD P/N
MN-ODM840)
For the CDM-800 Gateway Router via the CTOG-250 Comtech Traffic Optimization Gateway:
The FEC method used by the hub site CDM-800 is based upon the DVB-S2 standard for QPSK,
8PSK, 16APSK and 32APSK with concatenated Low Density Parity Code (LDPC) and BoseChaudhuri-Hocquenghem (BCH).
•
Appendix B. FEC (FORWARD ERROR CORRECTION) OPTIONS in the CTOG-250
Comtech Traffic Optimization Gateway Installation and Operation Manual
(CEFD P/N MN-CTOG250)
For the CDD-880 Multi Receiver Router: The FEC method used by the hub site CDD‐880 Multi
Receiver Router is a family of short‐block Low Density Parity Check (LDPC) codes with very low
latency called VersaFEC®. It is a patent pending technology wholly owned and developed by
Comtech EF Data and CEFD sister division Comtech AHA Corp. (the VersaFEC name is a
trademark registered to Comtech AHA).
Appendix B. FEC (FORWARD ERROR CORRECTION) OPTIONS in the Comtech EF Data
CDD-880 Multi Receiver Router Installation and Operation Manual (CEFD P/N
MN-CDD880)
A–2
CDM-840 Remote Router
Appendix A
A.2
Revision 2
MN-CDM840
Adaptive Coding and Modulation / Variable Coding and Modulation
(ACM/VCM)
The VersaFEC® Adaptive Coding and Modulation (ACM) feature is a patents-pending technology
owned and developed by Comtech EF Data and CEFD sister division Comtech AHA Corp. ACM
turns fade margin into increased link capacity 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).
Outbound ACM operation is available in the CDM-800 Gateway Router via the CTOG-250
Comtech Traffic Optimization Gateway, and ACM operation is available in the CDM-840 /
ODM/R-840 Remote Routers and CDD-880 Multi Receiver Routers.
•
•
•
•
Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT in this manual
Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT in the
Comtech EF Data ODM-840 Outdoor Remote Router / ODMR-840 Reduced
Form Factor Outdoor Remote Router Installation and Operation Manual (CEFD
P/N MN-ODM840)
Chapter 7. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT and
Appendix E. OUTBOUND ACM (ADAPTIVE CODING AND MODULATION) in the
Comtech EF Data CTOG-250 Comtech Traffic Optimization Gateway Installation and
Operation Manual (CEFD P/N MN-CTOG250)
Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT in the Comtech
EF Data CDD-880 Multi Receiver Router Installation and Operation Manual (CEFD
P/N MN-CDD880)
A–3
CDM-840 Remote Router
Appendix A
A.3
Revision 2
MN-CDM840
Bridge Point-to-Multipoint (BPM) Operation
The Advanced VSAT BPM feature functions as a Learning Ethernet Switch when the “Working
Mode” is set to BPM. This makes the Advanced VSAT equipment appear as a “Sky Ethernet
Switch” and allows for a greatly simplified network deployment.
In BPM Mode, all L2/L3/L4 protocols such as VLAN, MPLS, IPv6, OSPF, and BGP will flow through
the network as they would through an off-the-shelf Ethernet Switch.
The Advanced VSAT System, running in BPM Mode, supports Flat Networks, Flat Networks with
Routers, and VLAN Trunking network topologies.
•
•
•
•
A.4
Appendix C. BRIDGE POINT-TO-MULTIPOINT (BPM) OPERATION in this manual.
Appendix C. BRIDGE POINT-TO-MULTIPOINT (BPM) OPERATION in the Comtech
EF Data ODM-840 Outdoor Remote Router / ODMR-840 Reduced Form Factor
Outdoor Remote Router Installation and Operation Manual (CEFD P/N
MN-ODM840)
Appendix C. BRIDGE POINT-TO-MULTIPOINT (BPM) OPERATION in the Comtech
EF Data CTOG-250 Comtech Traffic Optimization Gateway Installation and
Operation Manual (CEFD P/N MN-CTOG250)
Appendix C. BRIDGE POINT-TO-MULTIPOINT OPERATION (BPM) in the Comtech
EF Data CDD-880 Multi Receiver Router Installation and Operation Manual (CEFD
P/N MN-CDD880)
E1 WAN/RAN Optimization
E1 RAN (Radio Access Network) Optimization technology, jointly developed by Comtech EF Data,
CEFD sister division Comtech AHA Corp., and CEFD subsidiary Memotec Inc., is used to
significantly reduce the Wide Area Network (WAN) / satellite bandwidth required to carry an E1
bearer used for cellular backhaul. It is a feature available with the CDM-840 and ODM/R-840
Remote Routers and the CXU-810 RAN Optimizer.
•
•
•
Appendix G. WAN/RAN OPTIMIZATION in this manual.
Appendix G. WAN/RAN OPTIMIZATION in the Comtech EF Data ODM-840
Outdoor Remote Router / ODMR-840 Reduced Form Factor Outdoor Remote
Router Installation and Operation Manual (CEFD P/N MN-ODM840)
Memotec CX-U Series Hardware Reference Manual (Memotec Inc. P/N CX-UHW-Guide)
A–4
CDM-840 Remote Router
Appendix A
A.5
Revision 2
MN-CDM840
Entry Channel Mode (ECM)
ECM operation is available in the CDM-840 and ODM/R-840 Remote Routers, and the CDD-880
Multi Receiver Router. ECM is a feature based on slotted Aloha with random retransmission
backoff. It supports multiple carriers through frequency assignments, which provide simplified
deployment and scalability.
While a CDM-840 or ODM/R-840 is in Entry Channel Mode, it allows the passing of management
traffic only – it will not transmit user data traffic. An ECM-enabled 840 may remain in the entry
channel for an extended period if “online” communications are not required, or if dSCPC
(dynamic Single Carrier Per Channel) resources are unavailable. While idle or waiting in the entry
channel, the 840 sends periodic health status messages to the CTOG-250 and Vipersat
Management System (VMS) while it continues to service VMS recovery logic timers.
•
•
•
Appendix F. ENTRY CHANNEL MODE (ECM) in this manual
Appendix F. ENTRY CHANNEL MODE (ECM) in the Comtech EF Data ODM-840
Outdoor Remote Router / ODMR-840 Reduced Form Factor Outdoor Remote
Router Installation and Operation Manual (CEFD P/N MN-ODM840)
Appendix D. ENTRY CHANNEL MODE (ECM) in the Comtech EF Data CDD-880 Multi
Receiver Router Installation and Operation Manual (CEFD P/N MN-CDD880)
A–5
CDM-840 Remote Router
Appendix A
Revision 2
MN-CDM840
Notes:
A–6
Appendix B. FEC (FORWARD
ERROR CORRECTION) OPTIONS
B.1
FEC Overview
The method of FEC (Forward Error Correction) used by the CDM-840 Remote Router depends on
the direction of signal processing in use:
B.2
•
The receive (Rx) side of the CDM-840 operates with error correction based on the DVBS2 standard for QPSK, 8PSK, 16APSK and 32APSK with concatenated Low Density Parity
Code (LDPC) and Bose-Chaudhuri-Hocquenghem (BCH).
•
The transmit (Tx) side of the CDM-840 uses a family of short-block LDPC codes called
VersaFEC®. VersaFEC is a patents-pending technology wholly owned and developed by
Comtech EF Data and CEFD sister division Comtech AHA Corp. (the VersaFEC name is a
trademark registered to Comtech AHA). VersaFEC is ideal for lower data rates that
demand the shortest possible latency.
DVB-S2: LDPC and BCH
The DVB-S2 specification defines a generation of performance that boosts throughput by about
30% over DVB-S while using the same amount of bandwidth. The result is coding and
modulation that surpasses the capability of concatenated Viterbi and Reed Solomon coding.
LDPC and BCH is also a concatenated error correction technique; the LDPC coding scheme features
significant, Near-Shannon Bound Performance.
In some cases, LDPC error correction starts flaring toward an error floor as the carrier-to-noise ratio
increases. To compensate, BCH error correction follows LDPC and eliminates the flare for any
practical range of error rates.
LDPC also functions differently than Viterbi decoding by using iterative decoding. In this process,
the data initially corrected by the LDPC decoder is re-encoded and run through the decoder
again to correct additional errors. Through soft decision output from the LDPC decoder and a
high-speed processor operating at a rate much higher than the data rate, the iterative process is
run as many times as possible before corrected data is finally output to make way for a new
block of data entering the decoder.
B–1
CDM-840 Remote Router
Appendix B
Revision 2
MN-CDM840
LDPC also uses interleaving to spread the errors. In contrast, Viterbi error correction operates by
passing data through the convolutional error correction process using a single error correction
pass.
The error correcting capability of LDPC is enhanced by use of large block sizes. Although large
block sizes can increase latency in low bitrate applications (typically less than 2Mbps), this is not
a drawback in one-way broadcast applications. Links with LDPC normally operate at multimegabit data rates where latency effects are minimal. The standard block size for LDPC is 64,800
bits and, for lower data rate applications, a short frame block at 16,800 bits suffers only a small
error correcting loss (0.2 to 0.5 dB) compared to the standard block.
B.2.1
Range of Data Rates
See Sect. 1.4 SUMMARY OF SPECIFICATIONS for the range of available data rates.
B.2.2
BER, QEF, Eb/No, Es/No Spectral Efficiency, and Occupied Bandwidth
Depending on the operating mode, the DVB standard uses different modes of specifying
performance with a unit in IF Loop and Additive White Gaussian Noise (AWGN):
•
DVB-S2 standard: "Quasi Error Free" (QEF) is defined as "less than one uncorrected
error-event per transmission hour at the level of a 5 Mbits/s single TV service decoder",
approximately corresponding to a Transport Stream Packet Error Ratio equal to a
PER<10-7 before demultiplexer. A packet is defined as block of 188-byte MPEG frame
size data.
•
Es/No vs. Eb/No: The DVB-S2 standard commonly refers to the use of Es/No instead of
Eb/No. When links operate at a constant symbol rate this is a good method for comparing
the performance of different modulation types and code rates.
The relation between the two quantities is given by:
Eb/No = Es/No – 10log(Spectral Efficiency)
•
Occupied Bandwidth: Occupied bandwidth is defined as the bandwidth between -10 dB
points of the power spectral density, which are approximately:
Occupied Bandwidth
= 1.19 x Symbol Rate, for 35% Rolloff
= 1.15 x Symbol Rate, for 25% Rolloff
= 1.12 x Symbol Rate, for 20% Rolloff
* Taken at the -10 dB points on the plot of power spectral density, the occupied bandwidth is 1.19 x Symbol Rate for
35%, and 1.15 x Symbol Rate for 25%.
B–2
CDM-840 Remote Router
Appendix B
B.3
Revision 2
MN-CDM840
VersaFEC (Short-block LDPC)
While LDPC coding represents a significant development in the area of FEC and its performance
is exceptional in terms of coding gain, its higher latency is considered disadvantageous in some
applications.
Comtech EF Data’s development of LDPC incorporated research into 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 result is development of a set of VersaFEC codes with two distinct
purposes:
1) To provide an expanded choice of combinations of modulation and coding that
significantly reduces latency without compromising coding gain performance.
2) To provide combinations of modulation and coding (MODCODs), which are suitable for
not only Constant Coding and Modulation (CCM) applications, but are also the basis for a
patent-pending Adaptive Coding and Modulation (ACM) system.
VersaFEC offers a sufficient range of code rates and modulation types that optimize link
performance under most conditions. Figure B-1 compares the performance of the VersaFEC codes
with the Shannon bound. Note that the chart uses SNR in place of Eb/No – a convention for
comparing ACM MODCODs. SNR is defined as Eb/No + 10log (Spectral Efficiency).
Figure B-1. The VersaFEC Codes versus Shannon Capacity
B–3
CDM-840 Remote Router
Appendix B
Revision 2
MN-CDM840
Table B-1 specifies the 12 modulations types / code rates that comprise the VersaFEC MODCOD
Set. These chosen modulation types (BPSK, QPSK, 8-QAM and 16-QAM) and code rates afford a
continuous progression of performance in terms of both Eb/No and spectral efficiency – essential
aspects of a well-engineered ACM system.
Table B-1. The VersaFEC MODCOD Set
Spectral
Latency at
Block size, Typical Eb/No, for
Min. Data Rate, Max. Data Rate,
Modulation Code Rate Efficiency,
64 kbps, in
-8
bits
BER = 5 x 10
CCM mode
CCM mode
bps/Hz
milliseconds
B.3.1
BPSK
0.488
0.49
2k
2.4 dB
26
16 kbps
2.19 Mbps
QPSK
0.533
1.07
4.1k
2.2 dB
53
18 kbps
4.80 Mbps
QPSK
0.631
1.26
4.1k
2.7 dB
59
21 kbps
5.67 Mbps
QPSK
0.706
1.41
4.1k
3.4 dB
62
23 kbps
6.34 Mbps
QPSK
0.803
1.61
4.1k
3.8 dB
66
26 kbps
7.22 Mbps
8-QAM
0.642
1.93
6.1k
4.6 dB
89
31 kbps
8.67 Mbps
8-QAM
0.711
2.13
6.1k
5.2 dB
93
35 kbps
9.60 Mbps
8-QAM
0.780
2.34
6.1k
5.6 dB
97
38 kbps
10.53 Mbps
16-QAM
0.731
2.93
8.2k
6.3 dB
125
47 kbps
13.16 Mbps
16-QAM
0.780
3.12
8.2k
7.0 dB
129
50 kbps
14.04 Mbps
16-QAM
0.829
3.32
8.2k
7.5 dB
131
54 kbps
14.91 Mbps
16-QAM
0.853
3.41
8.2k
8.0 dB
132
55 kbps
15.35 Mbps
Range of Data Rates
See Sect. 1.4 SUMMARY OF SPECIFICATIONS for the range of available data rates.
B.4
CDM-840 Rx/Tx Error Performance Characteristics
For Rx DVB-S2 Operation: Figure B-2 through Figure B-5 illustrate the guaranteed error
performance characteristics of the CDM-840 while receiving with Normal frames (64,800 bits),
Pilots ON.
For Tx VersaFEC Operation: Figure B-6 through Figure B-9 illustrate the guaranteed error
performance characteristics of the CDM-840.
B–4
CDM-840 Remote Router
Appendix B
Revision 2
MN-CDM840
Figure B-2. DVB-S2 QPSK Packet Error Rate versus Es/No
B–1
CDM-840 Remote Router
Appendix B
Revision 2
MN-CDM840
Figure B-3. DVB-S2 8PSK Packet Error Rate versus Es/No
B–2
CDM-840 Remote Router
Appendix B
Revision 2
MN-CDM840
Figure B-4. DVB-S2 16APSK Packet Error Rate versus Es/No
B–3
CDM-840 Remote Router
Appendix B
Revision 2
MN-CDM840
Figure B-5. DVB-S2 32APSK Packet Error Rate versus Es/No
B–4
CDM-840 Remote Router
Appendix B
Revision 2
MN-CDM840
Eb/No in dB
1
2
3
4
5
6
7
8
9
10
11
12
1E-1
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
1
2
3
4
5
6
7
8
9
BER
Figure B-6. VersaFEC Codec – BPSK, Rate 0.488
B–5
10
11
12
CDM-840 Remote Router
Appendix B
Revision 2
MN-CDM840
Eb/No in dB
1
2
3
4
5
6
7
8
9
10
11
12
1E-1
Comtech VersaFEC® Codec
Rate 0.533, 0.631, 0.706,
and 0.803 QPSK
Uncoded
BPSK/QPSK
1E-2
1E-3
Rate
Rate
0.533 0.631
QPSK QPSK
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
1
2
3
4
5
6
7
8
9
10
BER
Figure B-7. VersaFEC Codec – QPSK, Rate 0.533, 0.631, 0.706 and 0.803
B–6
11
12
CDM-840 Remote Router
Appendix B
Revision 2
MN-CDM840
Eb/No in dB
1
2
3
4
5
6
7
8
9
10
11
12
1E-1
Comtech VersaFEC® Codec
Rate 0.642, 0.711, 0.780
8-QAM
Uncoded
BPSK/QPSK
1E-2
Rate
0.642
8-QAM
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
1
2
3
4
5
6
7
8
9
10
BER
Figure B-8. VersaFEC Codec – 8-QAM, Rate 0.642, 0.711, and 0.780
B–7
11
12
CDM-840 Remote Router
Appendix B
Revision 2
MN-CDM840
Eb/No in dB
1
2
3
4
5
6
7
8
9
10
11
12
1E-1
1E-2
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
0.829
16-QAM
Rate
0.853
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
1
2
3
4
5
6
7
8
9
10
11
BER
Figure B-9. VersaFEC Codec – 16-QAM, Rate 0.731, 0.780, 0.829 and 0.85
B–8
12
Appendix C. BRIDGE POINT-TOMULTIPOINT (BPM) OPERATION
C.1
Introduction
The overall intent of the Advanced VSAT Bridge Point-to-Multipoint (BPM) feature is to make
the Advanced VSAT equipment appear as a “Sky Ethernet Switch”. This allows for a greatly
simplified network deployment.
In BPM Mode, all L2/L3/L4 protocols, such as VLAN, MPLS, IPv6, OSPF, and BGP, flow through
the network as they would through an off-the-shelf Ethernet Switch.
Figure C-1. Advanced VSAT BPM “Sky Ethernet Switch”
C–1
CDM-840 Remote Router
Appendix C
C.2
Revision 2
MN-CDM840
Supported Network Configurations
When running in BPM Mode, the Advanced VSAT System supports Flat Networks, Flat Networks
with Routers, and VLAN Trunking network topologies.
C .2.1 F lat Network
In a Flat Network (Figure C-2), all devices are on the same IP subnet. This is a very easy-to-use
topology for simple and/or small networks.
Figure C-2. Flat Network
C .2.2 F lat Network with R outers
This variation of the Flat Network includes Routers at each site. With this topology (Figure C-3),
the Routers can be placed on the same subnet as if they were connected to the same Ethernet
Switch, and all core routing protocols such as OSPF, RIPv2, BGP, VRRP, etc. work as expected.
Figure C-3. Flat Network with Routers
C–2
CDM-840 Remote Router
Appendix C
Revision 2
MN-CDM840
C .2.3 V L AN T runking
In a VLAN Trunking topology (Figure C-4), the Hub side equipment functions as a VLAN trunking
interface. You can map Outbound packets (Hub to Remote) to the desired QoS Group (see Sect.
C.6).
By default, the CDM-840 equipment functions as a VLAN trunk and passes all traffic received on
the WAN and Traffic LAN ports. In this mode, you should have a VLAN-enabled Ethernet Switch
at each remote to properly break out the VLAN into the desired network topology.
In addition, you can optionally configure the CDM-840 in Access Mode with a user assigned
VLAN ID (see Sect. C.4).
Figure C-4. BPM with VLANs
C.3
Packet Processing
C .3.1 T raffic Network / E thernet S witc h B ehavior
The Advanced VSAT BPM feature functions as a Learning Ethernet Switch when you set the
“Working Mode” to BPM. BPM has the following basic functionality:
•
MAC addresses associated with each segment/port are learned by inspecting the source
MAC for packets arriving at each Ethernet port.
•
Once the port association for a MAC address is learned, an Ethernet Switch will not
transmit Ethernet packets with that MAC address to other segments/ports.
•
Broadcast packets are sent out all interfaces.
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For Advanced VSAT BPM Mode, it is important to note that the CTOG-250 Comtech Traffic
Optimization Gateway and CDM-840s learn MAC addresses and avoid any unnecessary
transmission. In BPM Mode, the CDD-880 Multi Receiver Router functions as a receive-only
pass-through to the CTOG-250.
C .3.2 Management Network
Note that, while the Advanced VSAT BPM feature supports Bridged Traffic ports, the
Management ports for all units in the Advanced VSAT System must operate in Router Mode.
When in BPM Mode, the Traffic ports on the Advanced VSAT units do not have IP Addresses (as
you would expect from an Ethernet Switch). Therefore, the units cannot be managed (SNMP,
Web, Telnet) or pinged from this interface.
Figure C-5. Management Network in BPM Mode
When configuring the CTOG-250 for “BPM” Working Mode, Comtech Dynamic Routing Protocol
(CDRP) continues to work as expected to populate the CTOG-250 with the routes required to
manage the remote CDM-840s via their Management IP Addresses. Handle the Return Link
Routed Management Traffic by entering a default route (0.0.0.0/0 “toWAN”) in the CDM-840’s
routing table.
As with “Router” Working Mode, you must enable CDRP in order for ACM/VCM on the DVB-S2
Outbound Carrier to work for Management Traffic destined to each remote.
User traffic on the Traffic ports does not require CDRP, as BPM automatically and seamlessly
handles ACM/VCM for this traffic.
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When operating the network with the Comtech NetVue or Vipersat Management System (VMS),
the Advanced VSAT units (CTOG-250/CDM-800, CDM-840, and CDD-880) are managed through
the Management Network using the Management Ethernet port and Management IP Addresses.
C.4
IEEE 802.1Q Support
Advanced VSAT support for IEEE 802.1Q includes VLAN Trunking, Access Mode and Multiple
VLAN Tagging support.
C .4.1 V L AN T runking
The Advanced VSAT Hub equipment always functions in VLAN Trunking Mode. Trunking Mode
means that Ethernet packets received by the CTOG-250 LAN-1 interface are passed, unchanged
and unfiltered, to the appropriate remote modem.
Likewise, when the CDM-840 is in Trunking Mode, the VLAN tags are passed, unchanged and
unfiltered, through the modem.
The CDD-880 is a receive-only pass-through in BPM Mode. As such, it receives the packets from
the remotes and passes them to the CTOG-250 for processing and forwarding.
C .4.2 Ac c es s Mode S upport
As part of 802.1Q support, the CDM-840 supports Traffic port configuration in either Trunk or
Access Mode. Access Mode allows the CDM-840 to function as a VLAN edge switch to add and
remove VLAN tags to connect a distant end network with other networks.
•
All packets received at the Traffic Ethernet port are tagged with the assigned Access
Port VLAN ID.
•
All packets having the matching VLAN ID that are then received from the WAN have the
VLAN tag removed, and the packets are passed out the Traffic LAN port.
•
In Access Mode, the CDM-840 drops all packets that already have VLAN tags that it
receives at its Traffic LAN port.
•
In Access Port Mode, packets that do not have a matching VLAN ID that are received
from the WAN are dropped.
(Note that this is not normal behavior as, once the MAC addresses have been learned at
a given remote, all other remotes will then perform a hardware-level filter on the
packets.)
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C .4.3 Multiple V L AN T agging S upport
The Advanced VSAT platform supports processing Ethernet packets with multiple stacked VLAN
tags, with the following limitations:
C.5
•
At the CTOG-250, only the outermost VLAN ID is used for mapping to the appropriate
QoS Groups.
•
In Trunking Mode, L2 Header Compression only compresses packets with one or two
VLAN Headers. Packets with more than two VLAN Headers are allowed to pass, but only
the first two VLAN headers will not be compressed.
Multicast BPM Behavior
In BPM Mode, Multicast packets are forwarded in two directions:
•
Outbound Path (CTOG-250 ► CDM-840): Multicast packets arriving at the CTOG-250 are
passed out the WAN to all CDM-840s using the “VCM Only MODCOD” option for the
matching QoS Group (based upon VLAN or Subnet).
•
Return Link Path (CDM-840 ► CDD-880 ► CTOG-250): Multicast packets arriving into the
CDM-840 Traffic port are automatically passed out the CTOG-250’s Traffic port only.
Internet Control messages (such as OSPF, RIP, and BGP) that fall into the 224.0.0.0 224.0.1.255 address range are automatically passed out both the CTOG-250’s LAN and
WAN ports.
Figure C-6. Multicast Behavior in BPM Mode
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If required, you can create QoS rules with “Filter All” enabled to filter undesired Multicast from
traversing the satellite network for both the CTOG-250 and the CDM-840.
C .5.1 Multic as t Management/R outed B ehavior (no c hange)
In both BPM and Router Modes, Multicast packets arriving at the Management (routed) port of
the CTOG-250 and CDM-840 must be configured to be transmitted to the WAN by adding a
Multicast-specific route table entry with a “/32” subnet.
Packets arriving at the CDM-840 downlink pass out the CDM-840 Ethernet port based upon the
following criteria (configurable via NetVue or the Web page for each CDM-840):
C.6
•
Downlink (outbound from the Hub Segment) Multicast All – All downlink outbound
Multicast packets pass to the Traffic LAN interface of the CDM-840 unit.
•
Use IGMP (Internet Group Management Protocol) – Only remotes that have IGMP
clients enabled with the Multicast address pass the Multicast packet to the CDM-840’s
LAN port.
BPM and Group QoS with Outbound ACM/VCM
Figure C-7. Configuring VLAN to QoS Group Mapping
ACM/VCM on the Outbound carrier works with BPM by seamlessly matching packets to the
correct remote site. While no configuration is required, you have the ability to first use a VLAN
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ID, and then use a Subnet/Mask, to associate a packet to a QoS Group. This functionality allows
you to partition the Outbound Carrier capacity.
In BPM Mode, you must define a simple VLAN mapping algorithm to map traffic for a given
remote to a single QoS Group and a single VLAN ID.
However, in cases where it is desired to the support the same VLAN ID across multiple remotes
but continue to map the traffic for a remote to a single QoS Group, you have the ability to assign
the same VLAN with different subnet/masks.
Once you add a QoS Group, you can add up to 32 VLAN tags and/or 32 Subnet/Masks per QoS
Group.
Packet-to-QoS Group mapping employs a strict hierarchical matching algorithm:
Incoming Packet
No VLAN header
1 VLAN Tag
Matching criteria
Uses the Destination IP Address of the packet to match the packet
to the QoS Group with the user configured Subnet/Mask.
The desired QoS Group must not have any VLAN tags.
First match on the QoS Group with the configured VLAN tag.
If more than one QoS Group has the packet’s VLAN ID, then the
QoS Group with the matching Subnet/Mask will be used.
2 VLAN Tags
QoS Groups with a different VLAN ID or no VLAN IDs will not be
matched.
Same as the 1 V LAN Tag case, but the outermost VLAN tag will
be used for matching purposes.
If the packet fails to match on any of the User Configured QoS Groups, the packet is placed into
the Default QoS Group for processing.
C.7
Hub Network Configuration
In order for the BPM feature to operate as expected, you must configure the Hub Network as
defined here.
A standard off-the-shelf Ethernet switch that supports port isolation and MAC learning is
required. All ports connected to the CEFD equipment should have MAC learning enabled.
There are three basic deployment approaches:
1) A standalone CTOG-250
2) Multiple independent CTOG-250s
3) CTOG-250 redundancy.
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For the standalone CTOG-250 approach, there are no restrictions on the Hub network beyond
requiring that you connect the traffic ports for all of the CDD-880s and the CTOG-250 to the
same Ethernet Switch.
Figure C-8. Hub Configuration – Standalone CTOG-250, No Redundancy
While the Figure C-8 diagram suggests inclusion of the management network portion, it is not
strictly required. However, what is strictly required is that the following holds true for all
Advanced VSAT deployments:
•
The Management IP Addresses for all units have IP connectivity to the NetVue and VMS
server’s IP Address.
•
CDM-880 management ports must have a packet path to the Management IP Address of
the CDM-840s.
•
CDM-840s have a packet path to the Management IP Address of the CTOG-250.
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If you have multiple Advanced VSAT outbound carriers at a single Hub, Comtech EF Data
recommends the deployment architecture shown in Figure C-9.
Figure C-9. Hub Network Configuration
If you have multiple Advanced VSAT outbound carriers at a single Hub, Comtech EF Data
recommends the deployment architecture shown in Figure C-10. In this case, there is no need
for port isolation for each of the respective outbound networks; however, you MUST configure
the “Static CTOG-250 IP” that is found on the CDD-880 Configuration | Network | BPM web
page.
Once you set this value, then the CDD-880 is automatically associated with the desired
CTOG-250. The CDD-880 and CTOG-250 exchange a proprietary handshake mechanism that
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allows the packets coming from the CDD-880s to be associated with the correct CTOG-250, as
long as you enable MAC learning on the attached Ethernet Switch.
Figure C-10. Multiple CTOG-250 Outbounds in Redundant Mode
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Compatible Features and Detailed Specifications
Advanced VSAT BPM Mode is compatible with the following features:
Feature
Comments
Group QoS (CTOG-250)
and QoS (CDM-840)
Header Compression
Includes the following L2 Protocols:
• Ethernet 2.0
• Ethernet 2.0 + VLAN-tag
• Ethernet 2. 0 + V LAN-tag +
VLAN-tag
• Ethernet 2.0 + MPLS
• 802.3-raw
• 802.3-raw + VLAN-tag
• 802.3-raw + VLAN-tag + VLANtag
• 802.3 +802.2
• 802.3 +802.2 +VLAN-tag
• 802.3 + 802.2 + VLAN-tag
+VLAN-tag
• 802.3 +802.2 + SNAP
• 802.3 + 802.2 + S NAP +
VLAN-tag
• 802.3 +802.2 + SNAP + VLANtag + VLAN-tag
• 802.3 + 802.2 + S NAP +
MPLS
Includes the following L3/L4 Protocols:
• IP, UDP, TCP, RTP
Payload Compression
PTP (Precision Timing Protocol)
RANOP with E1
dSCPC with VMS
Entry Channel Mode (ECM)
AES-128
Return Link ACM
ACM/VCM on the Outbound
Comtech Dynamic Routing
Protocol (for the management
network)
Multicast
IPv6 (traffic ports only)
VLAN trunking
VLAN Access Mode on the CDM840
CTOG-250 and CDD-880 device
redundancy with the VMS
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The following features are not supported when in BPM Mode:
•
The standalone CDM-800* does not support BPM due to packet per second limitations.
•
Single Hop on Demand (SHOD) Mesh.
•
CDD-880 Port Diversity.
*Starting with Firmware Ver. 1.5.1.X, the CDM-800 no longer supports standalone
mode. The CDM-800 must be paired with a CTOG-250.
The Advanced VSAT BPM Working Mode has the following detailed specifications:
Attribute
Value
Comments
Maximum Ethernet Frame Size
2018 Bytes
Includes FCS but not the preamble
Working Mode
Routing or BPM
All units in the network MUST be
configured the same. All units in the
network must be configured to “BPM” for
BPM to function as expected.
Traffic port
Bridge in BPM Mode
Routed in Router Mode
Manage Port
Always in Router Mode (not
configurable)
VLAN Access Mode Support
CDM-840 will support VLAN
Access Mode for a single VLAN
ID.
WAN Labels
1-2047
Applies to CTOG-250, CDM-840, CDD-880
Access Port VLAN ID = 1..4095
Must be unique across all CDM-840s that
shared a CTOG-250 Outbound Carrier.
WAN Labels seamlessly provide hardware
level filtering to improve network
performance.
C.9
Summary
The Advanced VSAT Bridge Point-to-Multipoint feature and functionality enables the support of
network architectures requiring IEEE 802.1Q Standards in a number of simple yet powerful
network deployments. This is made possible in Advanced VSAT Firmware Version 1.5.X.X, while
taking advantage of all of the features and benefits of the Advanced VSAT Solutions platform.
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C.10 Glossary
Term
ACM/VCM
Bridge Mode
BPM Mode
Comtech Dynamic Routing
Protocol (CDRP)
CTOG-250
Entry Channel Mode (ECM)
Flat Network
IGMP
Router Mode
Single Hop on Demand
(SHOD)
VLAN Access Mode
VLAN Trunking Mode
Definition
Adaptive Coding and Modulation / Variable Coding and Modulation
This Advanced VSAT Network Working Mode configures the Traffic ports of the
CTOG-250 and CDM-840 to function as a Bridge.
Bridge Point-to-Multipoint Mode
CEFD Proprietary protocol that automatically synchronizes the CTOG-250’s Route
table with the CDM-840’s LAN connected routes – i.e., the routes that are directed
to the LAN ports of the CDM-840.
Comtech Traffic Optimization Gateway 250.
Shared Aloha channel used in Vipersat dSCPC Mode that allows a remote terminal
to gain access to the Network.
A network in which all devices are directly connected to each other and all devices
are on the same IP subnet.
Internet Group Management Protocol
This Advanced VSAT Network Working Mode configures the Traffic ports of the
CTOG-250, CDD-880, and CDM-840 to function as a Router.
This CEFD technology allows for dynamic creation of Single Hop Mesh connections
from one CDM-840 to another CDM-840. SHOD requires the Vipersat Management
System (VMS).
This mode, only available in the CDM-840, forces the Traffic Interface to carry traffic
for only one user-configured VLAN.
This is the default mode for BPM, where all packets (with and without VLAN tags)
arriving at the CTOG-250 and CDM-840 pass through the system without
modification. A trunked port can pass two or more VLANs on the interface.
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Appendix D. HEADER AND
PAYLOAD COMPRESSION
D.1
Introduction
Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT
Header and Payload Compression are standard features provided in Comtech EF Data’s
Advanced VSAT Series group of products, including the CDM-840 Remote Router.
The CDM-840 implements Payload Compression via the presence of a GZIP ASIC on the CDM840 main board. This integrated circuit provides the transmit compression and receive
decompression capabilities for maximum throughput and efficiency.
With Header Compression, the compression library that is incorporated into the CDM-840 for all
IP traffic can reduce 40-byte IP/UDP/RTP headers to as little as one (1) byte, or as little as three
(3) bytes for TCP/IP. For Voice-over-IP (VoIP), Header Compression provides bandwidth savings
greater than 64%.
For example, using an 8kbps G.729E voice codec requires 24 kbps of IP bandwidth once
encapsulated into an IP/UDP/RTP datagram. With Comtech EF Data’s Header Compression
enabled, the same voice call requires only an approximate 8.5 kbps – a savings of almost 65%.
Additionally, bandwidth requirements for typical Web/HTTP traffic can be reduced by 10% or
more with TCP/IP Header Compression operation enabled.
With Payload Compression, the required satellite bandwidth can be reduced by as much as 40 to
50% based on Calgary Corpus files. The compression algorithm can be applied to all data, SLE
and DVB-S2 header excluded. Compression statistics are fed back to the Quality of Service (QoS)
system in order to maximize WAN utilization while maintaining priority, latency, and jitter.
D.1.1 T raffic Optimization
Traffic optimization through payload compression is provided on the CDM-840 using Comtech
AHA Corp. compression technology via its installed ASIC. The CDM-840 ostensibly supports a
hardware-accelerated compression algorithm based on GZIP, a file format standard where the
underlying compression algorithm is called Deflate. Deflate is a compression algorithm that is
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widely available as an open-source software tool; it does not require the use of a software
license.
Deflate-compressed blocks are wrapped with a header and footer to become GZIP files.
Typically, when a classical, single, general purpose CPU performs GZIP compression, either the
compression performance is scaled back to maximize data throughput speeds, or the CPU runs
slow. To negate either deficiency, an efficient solution is to offload the compression task to a
hardware-based GZIP function, as is accomplished with the CDM-840. Hardware-based GZIP
compression offloads lossless data compression and frees up the system’s main CPUs. This
allows the compression functions to operate not only independently, but also at much higher
data rates if needed. The ASIC takes in uncompressed input data, compresses it, and outputs the
data in compressed form. The compression hardware does many tasks in parallel, only offloaded
from the central CPUs of the CDM-840. This effectively eliminates the multi-pass and iterative
nature typical of a classical, single, general purpose CPU that is over tasked with executing the
Deflate algorithm.
D.1.2 C ompres s ion P erformanc e
Compression performance is classically measured by two metrics – size reduction and data
throughput:
•
Size reduction is usually reported as a ratio of the uncompressed original size divided by
the compressed size.
•
Data throughput is measured in bytes per second (bps) as measured on the
uncompressed side of the GZIP ASIC.
Data complexity has no effect on data throughput. Easy-to-compress data files that compress
with a high ratio pass through the co-processor at the same high data rate as very complex data,
which achieves lower compression ratios.
Table D-1 provides Comtech AHA GZIP compression ratio results as compared with the Calgary
Corpus and Canterbury Corpus industry standard file sets and algorithms. The HTML file set is
from a collection of Internet dynamic content; LZS (Lempel-Ziv-Stac) compression results are
based on publicly available descriptions of the LZS algorithm.
Table D-2 outlines the comparison the effects of the CTOG specification for current operation,
based on a session-based compression for which the current performance specifications are
given.
Table D-1. Comtech AHA GZip Performance Comparisons
File Sets
Comtech AHA363-PCIe
LZS
ALDC
Calgary Corpus
2.7:1
2.2:1
2.1:1
Canterbury Corpus
3.6:1
2.7:1
2.7:1
HTML
4.4:1
3.4:1
2.65:1
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Table D-2. Comtech AHA GZip Performance Specifications Support
D.2
Description
Specification
Number of TX compression sessions supported
64,000
Session history size supported
2048
Granularity of control
Per route basis
Refresh rate
1 to 600 packets or 1 second whichever comes first
Compatibility
Packets compressed by the CDM-840 transmitter will be
decompressed without error by the CDM-840 receiver.
Operating, Configuring, and Monitoring Header and Payload Compression
Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT
Use the following CDM-840 Web Server Interface pages for the configuration, operation, and
monitoring of Header and Payload Compression:
•
•
•
•
Configuration | Routing | Routes
Configuration | WAN | Mod | ACM
Configuration | WAN | Compression
Status | Statistics | Compression
D.2.1 E nabling or Dis abling Header and P ayload C ompres s ion Operation
Figure D-1. Configuration | Routing | Routes page
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Use the Configuration | Routing | Routes page (Figure D-1) to enable or disable Header and
Payload Compression operation when operating in Router Mode.
When operating in Bridge Point-to-Multipoint (BPM) Mode, use the Bridged Point-to-Multipoint
Configuration on the Compression Configuration Page. This will enable and disable the Header
and Payload compression for the entire Transmit path.
When enabled, the CDM-840 automatically identifies supported packets for Header
Compression. The only configurable settings are the Header and Payload Compression Refresh
Rates.
Header and Payload Compression is independent from QoS. The enabling or
disabling of this feature is required only on the sending Comtech EF Data VSAT
products (CDM-840, CTOG-250, or standalone CDM-800). The need to Header and
Payload Decompress incoming packets on the CDM-840 or CDD-880 is automatic
and transparent to the user.
D.2.2 C onfiguring Header and P ayload C ompres s ion R efres h R ates
Figure D-2. Configuration | WAN | Compression page
Use the Configuration | Compression page (Figure D-2) to define the Header and Payload
Compression Refresh Rates. These settings control how many compressed header packets are
sent before a single full header packet is sent.
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The supported refresh rates are based on the runtime characterization that there will be, at
most, 600 packets seen between refreshes. Additionally, even though the runtime supports
64,000 Tx compression sessions, it is only necessary to have context storage for a small number
over those 600 packets. Based on this specification, the CDM-840’s compression performance is
defined in Table D-3 (±5% with different compression refresh rates).
Table D-3. Compression Performance
Packet Size
40
420
800
1200
1472
1
23%
40%
46%
49%
50%
% Savings per Compression Refresh Rate
25
50
300
50%
53%
53%
51%
51%
51%
53%
53%
53%
54%
54%
53%
55%
55%
55%
600
55%
51%
53%
54%
55%
While some compressed header traffic can be lost during deteriorated satellite link
conditions, the CDM-840 tries to minimize that when Adaptive Coding and
Modulation (ACM) is enabled (Figure D-3). Sending a full packet allows the return
of the traffic stream; you may increase the Refresh Rate (smaller value) when poor
satellite link conditions are prevalent or, conversely, decrease the rate (larger
value) under clear sky condition operations.
Figure D-3. Configuration | WAN | MOD | ACM page
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D.2.3 V iewing Header and P ayload C ompres s ion S tatis tic s
Figure D-4. Status | Statistics | Compression page
Use the Status | Statistics | Compression page (Figure D-4) to review Header and Payload
Compression statistics – the total bytes of the pre-compressed and post-compressed traffic and
effective compression ratio. The CDM-840 supports header compression for Ethernet, and Layer
3, 4, and 5 headers.
The CDM-840 currently supports Routing Mode operation only, so Layer 2 headers
are not transmitted over the satellite link. Therefore, there is no need for Layer 2
header compression.
Supported Ethernet Headers
•
Ethernet 2.0
•
803.3+802.2 + SNAP + VLAN tag
•
803.3+802.2 + SNAP
•
Ethernet 2.0 + MPLS
•
Ethernet 2.0 + VLAN tag
•
803.3+ SNAP + MPLS
•
802.3-raw _ VLAN tag
•
802.3-raw
•
803.3+802.2 + VLAN tag
•
803.3+802.2
Supported Layer 3 and Layer 4 Headers
•
IP
•
TCP
•
RTP (Codec Independent)
•
UDP
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Appendix E. DATA COLLECTION
E.1
Introduction
In the event that an operational issue (such as degraded performance or loss of IP access) is
encountered with an onsite (field-installed) CDM-840 Remote Router, it is crucial for Comtech
EF Data Product Support to receive diagnostic information collected from the onsite unit in
question in order to properly investigate and resolve the issue.
This appendix instructs you on the procedures required to collect this diagnostic information
from an onsite CDM-840 Remote Router. The procedures described in this appendix require a
user-supplied, Windows-based PC and a custom Serial Adapter Cable 1.
Perform these procedures in the following sequence:
1. You must first use the User PC to obtain pre-reboot information* from the onsite CDM-840.
Accomplish this by text capture with a user-supplied terminal emulation program (such as
Tera Term or HyperTerminal) installed on the User PC. You must use this terminal emulator
to access the CDM-840 Serial Interface, for serial communication (via the custom Serial
Adapter Cable connection) between the CDM-840 and the User PC.
* You must gather this information while the issue exists. Do not reboot the
CDM-840 for any reason until otherwise instructed in this appendix.
1
See Sect. E.5 in this appendix for the fabrication specifications required by the custom Serial
Adapter Cable that must be provided by the user for use in this procedure.
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2. Once you gather this initial pre-reboot information, you must reboot the CDM-840 to reinitialize and restore service.
3. In addition to collecting the pre-reboot Serial Interface text capture file, after the CDM-840
reboots you must retrieve its onboard data collection files via Ethernet connection, and
transfer these files to the User PC:
•
The “cdm840slot0.xml” file, which contains the CDM-840 modem configuration
settings;
•
The “log0”, “log1”, and “log2” files, which contain debug information.
4. Assuming that the User PC is equipped with the appropriate Internet access and e-mail
capabilities (Internet Explorer, for example), you musty e-mail these pre- and post-reboot
files to Comtech EF Data Product Support for evaluation.
E.2
Initial Setup of Communications Between the CDM-840 and the User
PC
CAUTION: Obey precautions for handling electrostatic-sensitive devices.
A. Connect the custom Serial Adapter Cable between the CDM-840 ‘CONSOLE’ port and an available RS-232
serial port on the User PC.
B. Connect a CAT5 Ethernet cable between CDM-840 Ethernet ‘MANAGEMENT | FE’ port and an available
Ethernet network RJ-45 port on the User PC.
C. Use t he t erminal e mulator program t o c onfigure t he s erial p ort c ommunication a nd t erminal di splay
operation as follows:
• 38400 bps (Baud Rate)
• 8 Data Bits
• 1 Stop Bit
• Parity = NO
• Port Flow Control = NONE
• Display New line Rx/Tx: CR
• Local Echo = ON
D. Upon successful setup of communications between the User PC and the CDM-840 Serial Interface, you will
see the remote command prompt on the terminal emulator display: “->”.
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E. Using W indows C ommand-line ( Start > Run... > cmd.exe), c reate a f older ( directory) named “ temp” ( or
some o ther e asy-to-remember na me) o n the U ser P C f or p lacement o f t he text c apture file, CDM-840
configuration file, and the data collection files:
Example: C:\>md temp
F. Set the terminal emulator program to capture the Serial Interface session to a text file. Be sure to specify
your “temp” folder as the destination path for this text file.
Refer to your terminal emulator program User Guide or Help feature for instructions
on configuring the serial port communications and for creating and saving text
capture files.
You are now ready to begin pre-reboot collection of diagnostic information from the CDM-840.
E.3
Collection of Pre-Reboot Diagnostic Information from the CDM-840
CAUTION: The pre-reboot information collection process differs depending on which
firmware version is running on your unit. Be sure to select and follow the correct
procedure.
Follow these steps to collect pre-reboot information from a CDM-840 using Firmware Version
1.3.3 or newer:
To do this:
Confirm that the Interfaces are
operational
Collect log files
Type this at the Serial Interface “->” prompt:
->display_diag_info
Note: You may be prompted to press “enter” and press “y
<CR>” a few times.
->LoggerSnapshot
Wait 30 seconds.
End the Serial Interface text capture
session – be sure to verify that you save Refer to your terminal emulator program User Guide or Help
the file to your “temp” folder successfully feature.
before rebooting.
You may now reboot the CDM-840 and proceed to E.4 Collection of Post-Reboot Diagnostic
Information from the CDM-840.
E–3
CDM-840 Remote Router
Appendix E
Revision 2
MN-CDM840
Follow these steps to collect pre-reboot information from a CDM-840 using Firmware Version
1.3.2 or older:
To do this:
Confirm that the interfaces are
operational
Type this at the Serial Interface “->” prompt:
->ifconfig
->ping "LAN IP Address"
►Get the configuration
Confirm that the WAN and DMA are
receiving and transmitting traffic
->cimmib_display_settings
->wan_dll_stats_print
->dma_stats_show 0
->dma_stats_show 1
->dma_stats_clear 0
(Answer ‘y’ to clear stats)
->dma_stats_clear 1
(Answer ‘y’ to clear stats)
►Now wait 30 seconds
->dma_stats_show 0
Determine that QoS and Classifier are
OK
->dma_stats_show 1
->qos_priorities_display
►Now wait 5 seconds
->qos_priorities_display
Display the reset of system context
->display_full_system_info
Get the system state
->i
->spy
►Now wait 10 seconds
Get kernel memory dump
->spyStop
->cmd
► You will see the Command-line CMD> prompt
CMD>slab
E–4
CDM-840 Remote Router
Appendix E
To do this:
Revision 2
MN-CDM840
Type this at the Serial Interface “->” prompt:
End the Serial Interface text capture
session – be sure to verify that you save Refer to your terminal emulator program User Guide or Help
the file to your “temp” folder successfully feature.
before rebooting.
You may now reboot the CDM-840 and proceed to E.4 Collection of Post-Reboot Diagnostic
Information from the CDM-840.
E.4
Collection of Post-Reboot Diagnostic Information from the CDM-840
A. “Ping” the CDM-840 to verify the connection and communication:
i.
Set the IP address of the CDM-840 so that it is in the same IP Subnet as the User PC.
Using the CDM-840 Serial Interface:
•
Connect serial cable as described in above procedures for collecting information.
•
Press enter multiple times and you should see CDM-840> prompt
•
Set IP Address and Subnet using the following command (configure the terminal emulator
Local Echo=ON to see what you type):
CDM-840> <0/IPA=xxx.xxx.xxx.xxx/ss
Where xxx.xxx.xxx.xxx is the IP Address and ss is the number of Subnet bits.
Example: <0/IPA=192.168.0.1/24
ii.
UseCommand-line to “ping” the CDM-840.
At t he W indows C ommand-line p rompt, t ype ping xxx.xxx.xxx.xxx
“xxx.xxx.xxx.xxx” is the Management IP Address of the CDM-840).
(where
The results should confirm whether or not the CDM-840 is connected and communicating.
B. Collect the configuration and log files file from the CDM-840 using File Transfer Protocol (FTP):
To do this:
Type this at the Windows Command-line prompt:
Change to the User PC “temp” folder
CMD>cd /temp
Open the FTP session to the
CDM-840
CMD>ftp xxx.xxx.xxx.xxx
Log in as Administrator
(where “xxx.xxx.xxx.xxx” is the Management IP
Address of the CDM-840).
(At the prompts, the default username and password are
comtech123 and comtech123)
E–5
CDM-840 Remote Router
Appendix E
Revision 2
MN-CDM840
To do this:
Type this at the Windows Command-line prompt:
Select binary transfer mode
ftp>bin
Change to “tffs” folder
ftp>cd /tffs
Retrieve the CDM-840 configuration
file
ftp>get cdm840slot0.xml
Collect log files (they may or may
not exist)
ftp>get log0
ftp>get log1
ftp>get log2
Terminate the FTP session
ftp>quit
C. Forward the data collection files to Comtech EF Data Product Support:
i.
Prepare your e-mail and address it to Comtech EF Data Product Support.
ii.
Attach the Serial Interface capture, “cdm840slot0.xml”, and any log files (“log0”, “log1”, “log2”) to
your e-mail.
iii. Send your e-mail to Comtech EF Data Product Support.
The Data Collection and Reporting Process is now complete.
E–6
CDM-840 Remote Router
Appendix E
E.5
Revision 2
MN-CDM840
Serial Adapter Cable Fabrication Specifications Reference
CAUTION: To ensure proper operation, fabrication of this Serial Adapter Cable requires that :
•
You must wire the connectors using the pinout tables and diagram provided here.
•
Type 'D' connectors must 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 connector back-shells.
User PC Interface End
CDM-840 Onsite Unit Interface End
Cable Connector Type: D-Subminiature DB-9F
(Type D-Sub 9-pin Female)
Cable Connector Type: D-Subminiature DB-9M
(Type D-Sub 9-pin Male)
Use: For connection to the User P C R S-232 Serial
Port
Use: For connection t o the CDM-840 O nsite Unit
‘CONSOLE’ Port
Description: CDM-840 ‘CONSOLE’ Port Interface
Description: PC Serial Port Interface
PIN
1
2
3
4
5
6
7
8
9
SIG
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
RI
WIRE LIST / PINOUT
NAME
DATA CARRIER DETECT
RECEIVE DATA
TRANSMIT DATA
DATA TERMINAL READY
SIGNAL GROUND
DATA SET READY
REQUEST TO SEND
CLEAR TO SEND
RING INDICATOR
DTE (PC)
IN
IN
OUT
OUT
-IN
OUT
IN
IN
E–7
PIN
1
2
3
4
5
6
7
8
9
WIRE LIST / PINOUT
ASYNCHRONOUS
SYNCHRONOUS
GROUND
GROUND
RS-232 Rx DATA OUT
RS-232 Rx DATA OUT
RS-232 Tx DATA IN
RS-232 Tx DATA IN
-RS-232 Rx CLOCK OUT
-RS-232 Tx CLOCK OUT
RS-232 Tx DATA ‘B’ IN
-RS-232 Tx DATA ‘A’ IN
-RS-232 Rx DATA ‘B’ OUT -RS-232 Rx DATA ‘A’ OUT --
CDM-840 Remote Router
Appendix E
Revision 2
MN-CDM840
Notes:
E–8
Appendix F. ENTRY CHANNEL
MODE (ECM)
F.1
Functional Overview
Comtech EF Data CDD-880 Multi Receiver Router Installation and Operation Manual
(CEFD P/N MN-CDD880)
Figure F-1. ECM – Message Processing Diagram
Figure F-1 illustrates the processing diagram for Entry Channel Mode (ECM) messaging. ECM is a
feature based on slotted Aloha with random retransmission backoff. ECM supports multiple
carriers through frequency assignments, which provide simplified deployment and scalability. In
a typical Comtech EF Data Advanced VSAT System network, the CDM-840 Remote Router
supports ECM as an installed component of a typical remote site cluster.
F–1
CDM-840 Remote Router
Appendix F
Revision 2
MN-CDM840
While a CDM-840 is in Entry Channel Mode, it allows the passing of management traffic only – it
will not transmit user data traffic. An ECM-enabled CDM-840 may remain in the entry channel
for an extended period if “online” communications are not required, or if dSCPC (Dynamic Single
Carrier Per Channel) resources are unavailable. While idle or waiting in the entry channel, the
CDM-840 sends periodic health status messages while it continues to service VMS recovery logic
timers.
Note that a “channel” refers to a fixed carrier slot on the satellite that allows the CDM-840
Remote Router random access (in time) to a readied HCC (Hub Channel Controller) for
transacting each acquired transmission. The HCC is a CDD-880 Multi Receiver Router that serves
as a dedicated hub demodulator selected (mode set) as an ECM controller. Each CDD-880
supports only one Entry Channel; this channel is always assigned to Demod #1.
The HCC uses a TAP (Transmission Announcement Protocol) message to broadcast a key subset
of transmit parameters that match its receive configuration, but assumes all other site specific
parameters were preconfigured at the time of antenna commissioning. In addition, the TAP
provides timing information in the form of slot parameters that define the required acquisition
time of the receiver and the amount of time allowed for data transmission. The TAP also
contains a list of CDM-840s that successfully transmitted during the previous cycle. The list of
CDM-840s from which the HCC expected – but did not receive – a response is also provided;
these CDM-840s are assigned a slot for the next cycle.
Each associated CDM-840 achieves loose time synchronization via the broadcast TAP message
transmitted at periodic intervals. Since the TAP transmits via the satellite, all CDM-840s receive
it at effectively the same time, with delay differences (due to geographic variation of each
remote site cluster) compensated with a specified guard time. Upon receipt of the TAP message,
the CDM-840 resets its ECM time reference and uses the slot information to determine/select
the next transmit opportunity:
•
If the CDM-840 has transmitted in the previous cycle, and does not indicate it is finished,
it receives an assigned slot as indicated by its IP Address.
•
If the CDM-840 does not have an assigned slot, it randomly picks one from the available
contention slots.
•
If no contention slots are available, the CDM-840 waits for the next cycle.
This process allows each CDM-840 to transmit at a discrete time to minimize the chance of
collision. To reduce slot contention further, a random backoff (next slot) algorithm is deployed if
the transmission was not received. Each CDM-840 attempts to enter the network by gauging its
transmissions from this timing reference, randomly picking one of the Set Aloha Slots (SAS)
presented by the TAP message. The transmit “on” time is of a fixed duration, allowing sufficient
time for the receiving CDD-880 to acquire and pass the management signaling messages. The
CDM-840 will continue to attempt access on cadence intervals using random backoffs, selecting
a different SAS until receiving positive acknowledgement from the HCC.
F–2
CDM-840 Remote Router
Appendix F
Revision 2
MN-CDM840
Upon valid reception, the HCC processes the Remote Identification (RID) packet containing the
CDM-840 IP Address, TAP (Group) ID, and ECM state flags. Each CDM-840 sign-on IP Address is
added to a list of CDM-840(s) that are queued and await assignment.
Depending on the ECM state flag, the CDM-840 either remains idle in the channel or is assigned
one of the next available time-sensitive slots. Each slot, labeled as a Set of Registration Slot
(SRS), is also assigned through the TAP and allows the CDM-840 to complete any necessary
transaction without further contention.
The CDM-840 then holds an SRS until it receives its assignment into dSCPC or determines that all
necessary transactions are complete; at this time, it releases the slot by signaling the HCC
through the RID message.
Upon release of the slot, the HCC re-assigns it to the group of contention slots. This cycle
repeats until all CDM-840s either have been switched to dSCPC channels or require no further
interaction.
Once the CDM-840 indicates that registration with VMS is complete (via one of the flags in the
RID message), on behalf of the CDM-840 the HCC requests dSCPC assignment by placing the
CDM-840 IP Address into the “switch pending” list and sending an ECM type switch request
message to the VMS. The VMS, upon receipt, either grants the request and signals the HCC to
remove the CDM-840 from its list, or ignores the request and leaves the CDM-840 in the “switch
pending” list. The HCC repeats this request at 12-second intervals up to five times before it
removes the CDM-840 from the “switch pending” list. While the CDM-840 is in this “switch
pending” ECM state, it continues to send SUM health status update messages to the VMS on
timed intervals. Since all ECM transmissions from the CDM-840 contain a RID, this causes the
CDM-840 to be placed back in the “switch pending” list. This cycle continues until the CDM-840
switches, or is set to ECM Wait state, or goes offline.
The VMS is the last step in the entry process that provides network registration, and grants or
ignores dSCPC resources. If resources are limited because of bandwidth, hardware, or
unavailability, the CDM-840s will remain in the entry channel pending assignment.
The VMS plays no role in ECM timing or control.
F–3
CDM-840 Remote Router
Appendix F
F.2
Revision 2
MN-CDM840
Entry Channel Mode Operation
See Sections F.1 Functional Overview and F.4 Glossary of Terms for descriptions
of the terminologies referred to in this section.
F.2.1
ECM Configuration using the Web Server Interfaces
Figure F-2. CDM-840 and CDD-880 ‘Configuration | ECM’ pages
Proper deployment of ECM in the Advanced VSAT Network requires complimentary
configuration of both the hub site CDD-880(s) and the remote site CDM-840(s) using each
product’s Web Server Interface ‘Configuration | ECM’ page (Figure F-2):
•
Use the CDM-840 Web Server Interface to configure one of three modes (states) of ECM
operation: Online, Wait or Offline.
•
Use the CDD-880 Web Server Interface to configure a basic set of parameters that
define the channel group. The settings consist of Enabling, TAP Multicast IP Address,
TAP (group) ID, Guard Band and a total count of Slots in Frame (combined SAS and SRS)
per cycle.
In addition, you must specify an LNB LO Frequency and Satellite Frequency Conversion to
accommodate mismatches between the hub site LNB and remote site BUCs. Channel
parameters are determined from the CDD-880 configuration settings. If spectral inversions
apply, all hub receiving CDD-880s that are part of that downlink chain must be set to match.
F–4
CDM-840 Remote Router
Appendix F
F.2.2
Revision 2
MN-CDM840
CDM-840 Remote Router Terminals
Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT
For the CDM-840: Select the ECM mode as Online, Wait or Offline. Each ECM state establishes a
different role for the CDM-840 in the overall Advanced VSAT Network operations:
•
Online – This is the most common ECM state, whereby the CDM-840 powers up,
requests network registration, and switches to dSCPC at the minimum site policy data
rate setting.
•
Wait – Keeping a CDM-840 in the ECM channel can result in oversubscription, where
some percentage of CDM-840s waits their turn for SCPC pooled resources. To avoid
oversubscription, this ECM state provides the network operator with the ability to
selectively control the CDM-840s through manual, scheduled, or externally switched
request commands.
With the CDM-840s set to Wait, they continue to send their health status update
messages to the VMS and to the CTOG-250 Comtech Traffic Optimization Gateway (with
integrated CDM-800 Gateway Router). The VMS messages update connected link status;
when dynamic routing mode is enabled, the ACM, CDRP, and data traffic statistics
messages sent to the CTOG-250 maintain the forward path ACM and routing tables.
•
Offline – In this ECM state, the CDM-840 does not transmit and remains idle until a new
ECM state is selected either locally or from the VMS. Examples for use of this particular
ECM state are COTM (communications on the move) or military maneuvers providing
radio silence conditions.
Figure F-3 illustrates the internal logic diagram of the remote processing registration message.
•
The CDM-840s are configured to receive the outbound carrier and are given a TAP
(Group) identifier number (default 1) that sets the internal filtering if multiple TAPs are
used.
•
Upon receipt of the TAP message, the CDM-840 sets modem transmission parameters (if
required), initializes timing, and picks at random an SAS to start entry by sending a
probe (slot transmission).
•
The CDM-840, based on its current ECM state, either requests an assigned slot or waits
to be switched:
o
An assigned slot request indicates to the HCC if the CDM-840 has more data (e.g.
registration protocol) to send.
o
A switch request indicates that the CDM-840 is requesting dSCPC bandwidth. These
two flags are independent.
F–5
CDM-840 Remote Router
Appendix F
Processing
Segment
Revision 2
MN-CDM840
Description
Remarks
Action
1
ALOHA
“Not Registered” or
“Reverted”
2
Remarks
A
Random attempts with backoff until in TAP
REGISTRATION
B
In TAP
3
SWITCH PENDING
C
Send Registration Protocol until complete
4
SWITCHED
D
Not in TAP
E
F
G
Registration complete – no more Slots
needed
Received “Switch Command” message
from VMS
Received “Revert” message from VMS
Figure F-3. ECM Message Processing – CDM-840 Remote Router
F–6
CDM-840 Remote Router
Appendix F
F.2.3
Revision 2
MN-CDM840
CDD-880 Hub Channel Controller (HCC)
Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT
F.2.3.1
Tap Message
The TAP message is a standard UDP/IP multicast forward over the outbound channel with a
payload containing the following sections:
•
Standard Vipersat Header (distinguishes TAP from other Vipersat messages)
•
Timestamp field (set by CDM-840 [at WAN interface] when TAP is received)
•
Aloha Channel Frequency Plan (Frequency, Data Rate, Modulation, and Coding)
•
Slot and Timing Control
•
Lists of CDM-840s with Assigned Slots (previous transmission succeeded / failed)
•
List of CDM-840s that have completed their handshake in the last cycle
As noted previously, receipt of a TAP causes all listening CDM-840s to synchronize internal
transmit timing clock in order to minimize collisions in the Aloha channel.
F.2.3.2
HCC Configuration
The TAP IP Address specifies the multicast address that all CDM-840s in the group use to receive
the TAP:
F.2.3.3
•
•
Timing as exposed to the user is message interval;
•
Total slot count that derives the Cycle Length is set in milliseconds;
•
All other parameters are calculated based on current rate;
•
The Date Slot Size is fixed at 6, and VersaFEC Blocks and Preamble is computed in
milliseconds based on the specified data rate;
•
Guard Band is determined during terminal commissioning.
Hub Operation
After configuration and initialization, the HCC broadcasts the TAP message on cycle intervals
waiting for Aloha channel RID messages. Successful reception of the RID places the
F–7
CDM-840 Remote Router
Appendix F
Revision 2
MN-CDM840
CDM-840 IP Address along with its ECM state flag (i.e., Online, Wait, or Offline) into the first
queued list. The controller checks the flag to determine next operation. If the ECM state is
Online, an SRS is assigned for next TAP processing.
•
The CDM-840 receives the TAP with its IP Address in the SRS list and, based on where its
place is in the sequential order, determines the slot assignment. By design convention,
assigned slots are at the end of the cycle and whatever remains is used for contention at the
beginning of the cycle. With the assignment, the CDM-840 transmits management data in its
assigned slot and awaits acknowledgment and next assignment.
•
After the CDM-840 completes its registration protocol, it releases the active flag in the next
RID cycle. At this point, the HCC will remove the processing CDM-840’s IP Address from the
list clearing the SRS allocation. If the CDM-840 is not switched out of ECM mode, it will
proceed to send a Status Update Message (SUM) every minute in order to maintain its
active status with VMS. Typically, a SUM should only require one transmission unless there
is contention, in which case the CDM-840 will go into back-off mode until the CDM-840
received acknowledgment from the HCC that the SUM was successfully transmitted.
Figure F-4 illustrates the internal logic diagram of the HCC processing of remote messages.
Processing
Segment
Description
Remarks
Action
1
ALOHA
A
2
TAP
In “Assigned Slot” list
B
3
SWITCH
PENDING
In “Switch Pending” list –
Switch Request sent to VMS
up to 5X in 12-second
intervals until response
C
4
SWITCHED
D
E
F
Remarks
RID Detected – add to Detection
List of TAP
RID Detected – add to Detection
List of TAP
Missed ‘N’ Consecutive Cycle
Registration complete – no more
slots needed
“Disable” message received from
VMS
CDM-840 received “Revert”
message from VMS
Figure F-4. ECM Message Processing – CDD-880 Multi Receiver Router
F–8
CDM-840 Remote Router
Appendix F
F.3
Revision 2
MN-CDM840
ECM Operational Scenarios
F.3.1
Scenario 1 – VMS Initial Registration Process
For proper registration with the VMS, initialization (power-up and bootup) of the ECM-enabled
CDM-840 is required.
Upon initialization, the CDM-840:
1. Receives a VMS Announcement, sets up an active VMS IP Address, and initializes ECM
TAP processing;
2. Transmits a registration request using a selected SAS, and sets a “Needs Slot” flag in the
RID message;
3. Receives the HCC response, through the TAP, assigning an SRS;
4. Continues to transmit the registration request message in SRS;
5. Receives registration from the VMS (Standard Processing);
6. Transmits a registration acknowledgement to the VMS in SRS – it signals the HCC by
clearing “Needs Slot” and sets the “Registered with VMS” and “Need to be Switched”
flags in the RID message.
7. Receives the HCC response, through the TAP, as an acknowledgement – the HCC then
clears the SRS allocation and sends ECM switch requests to the VMS on behalf of the
CDM-840 (Standard Processing);
8. Waits for VMS dSCPC assignment (Standard Processing).
F.3.2
Scenario 2 – Reverted or Auto-Recovered Messages
“Revert” or “Auto Recover” of an already registered CDM-840 is required when:
F.3.2.1
•
The CDM-840 was forced into or dropped back to ECM mode;
•
The CDM-840 transmits into an SAS setting due to a “Need to be Switched” flag in the
RID message;
•
The HCC sends ECM switch requests to the VMS on behalf of the CDM-840 (Standard
Processing).
ECM Revert Cycle Timing
When a CDM-840 reverts from dSCPC to ECM, there is typically no wait because the CDM-840 is
always monitoring TAP cycles to synchronize. It then randomly selects a slot in the next cycle
F–9
CDM-840 Remote Router
Appendix F
Revision 2
MN-CDM840
and transmits. If the probe is not detected at the corresponding CDD-880 (as indicated by the
next TAP to the CDM-840), it backs off by doubling the cycle and selecting another random slot.
If the revert happened near the end of the cycle the CDM-840 wait for next TAP.
The Slots in Frame setting is determined by the number of remotes in the cluster that are either
waiting in the channel or put back into the channel for recovery. Example, if there was only one
CDM-840 attempting to enter the network, it would be simple to determine the number of
required slots would be two – one for contention, and one for assignment. However, in any
given network there may be many CDM-840s attempting to pass through the ECM channel
depending on their state or network environment. Other catastrophic and potential real world
conditions may include hub outage (although unlikely), sun outages, rain fade, or regional
nightly power-down schedules.
In normal operations, only one to a few CDM-840s would be accessing the channel. The worstcase scenario is where all CDM-840s are placed in Aloha on the ECM channel and depending on
slot count the contention will be high until the ECM controller starts to cycle down through the
reception list and all CDM-840s are cleared.
In any case, it is important to accurately assign the total number of number of slots in order to
reduce contention and reduce the time it takes for all CDM-840s to re-enter the network dSCPC
resources. While it might seem obvious to adjust the Slots in Frame setting to a large number,
however this could have an inverse effect, because adding more slots increases the cycle time
adding potentially more delays-per-CDM-840 attempting access the channel.
While trial and error may be used to determine the correct settings (based on the actual
network parameters), Comtech EF Data enables you to avoid such a tedious process with its
available ECM Calculator. This tool, provided upon request, presents theoretical analysis,
number of cycles and time to capture all waiting CDM-840s.
conte
F.3.2.2
Contact Comtech EF Data Product Support to obtain the ECM Calculator.
ECMv2 Backoff Algorithm
The ECMv2 Backoff Algorithm optimizes between quick entry in a quiet network and minimal
collisions in an active network. Its key feature is the concept of fixed-length data slots within a
repeating frame (or cycle). You can control the number of slots in a frame based on the known
number of CDM-840s trying to gain entry into the network. Each total slot consists of three
components:
•
Acquisition Preamble
•
Data Segment for Management Messages
•
Guard Band to resolve timing uncertainty
F–10
CDM-840 Remote Router
Appendix F
Revision 2
MN-CDM840
An integral number of VersaFEC blocks are used for both the preamble and the data segment;
the guard band will vary due to system timing uncertainties and propagation delay due to the
geographic dispersion of the CDM-840s.
A Guard Band of 50ms is sufficient in most cases to accommodate geographical
latency differences and internal timing errors.
The preamble is pre-determined based on calibration tables for receiver acquisition at the
current data rate and MODCOD. The data segment is sized to support the largest messages
needed to complete the Entry Channel handshake protocol and maintain status and CDRP. The
actual size (in milliseconds) of each slot is therefore a function of the data rate and the number
of bits in a VersaFEC block for the ModCod of the ECM channel.
When a CDM-840 is ready to transmit, it waits for receipt of a TAP message that establishes time
synchronization between all CDM-840s. The TAP message also describes the configuration of the
Entry Channel Control receiver. The CDM-840 uses the information in the TAP to configure its
own Tx parameters and then checks for available Aloha Slots. If slots are available, it randomly
selects one of the available slots.
During heavy use, it is possible that all available slots will be dedicated to CDM840s that have already initiated the entry handshake although this situation should
never last more than two cycles unless there are collisions or degraded link state.
The slot number, multiplied by the total slot length (in milliseconds) provides the start time for
transmission, which is always relative to the receipt of the last TAP message.
The total slot length is the sum of the Guard Band, Preamble, and Data Segment
that are all provided in the TAP message.
After transmitting its request, the CDM-840 waits for the next TAP message that indicates if that
transmission was detected by the Entry Channel Controller. If the transmission is detected, the
CDM-840 receives an assigned slot in the current frame and continues to receive assigned slots
until it indicates it has completed its entry protocol. If the next TAP does not include an assigned
slot, the CDM-840 assumes a collision occurred and begins the backoff algorithm.
n
0
1
2
3
The backoff is based on contention levels of 2 (where n = 0 to 4; i.e. 2 =1, 2 =2, 2 =4, 2 =8, and
24=16). The Contention Level always starts at 0, which means the CDM-840 transmits in the next
frame when it receives a TAP message. If the transmission is not detected, the CDM-840 goes to
Contention Level 1 and picks a random slot in one of the next two frames. If it is still not
detected, Contention Level goes to 3 and the CDM-840 randomly picks a slot in one of the next
four frames.
If the CDM-840 is not detected by Contention Level 4 (16 frames), it then resets to Contention
Level 0 and tries again – the CDM-840 uses one random number to select a frame at the current
contention level and another random number to select a slot within the frame.
Since the CDM-840s are not aware of each other, their Contention Levels are
independent and determined only by when they were initially ready to transmit.
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Appendix F
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Glossary of Terms
Abbreviation Term
ASR
Application Switch Request
BUC
Block Up Converter
CDRP
Comtech Dynamic Routing Protocol
dSCPC
Dynamic Single Channel Per Carrier
HCC
Hub Channel Controller
LNB
Low-Noise Block Down Converter
RID
Remote Identification
SAS
Set of Aloha Slots
SRS
Set of Registration Slots
SUM
Status Update Message
TAP
Transmission Announcement
Protocol
VMS
Vipersat Management System
Comments
ASR is a private protocol used by the CDM-840 to request
bandwidth from the VMS.
The BUC is used in the Tx (uplink) of satellite signals to
convert a band of frequencies from a lower frequency to a
higher frequency.
CDRP is used to simplify the deployment of Comtech EF
Data’s Advanced VSAT solution in an IP-routed network.
dSCPC is a Comtech EF Data FAST Feature used to
enable dynamic allocation and sharing of bandwidth among
users.
The HCC is a dedicated CDD-880 that generates the TAP
and is responsible for all request transactions from each
CDM-840 while in Entry Channel Mode.
The LNB is the receiving device on a parabolic satellite
dish used for the Rx (downlink) of satellite signals
The RID is a message, presented to the Hub Channel
Controller upon each transmission into the Aloha channel,
which contains the IP Address and control flag.
SAS is used as random access for initial request
messaging from the CDM-840s.
SRS is used for time sensitive management message
transactions.
SUM is used for updating VMS device control parameters,
such as Tx Frequency, Data Rate, Current MODCOD,
Eb/No, Es/No, ACM information, etc.
The TAP is the time and frequency reference message
sent on intervals to synchronize any listening CDM-840s
into the Entry Channel.
A VMS is a configuration, management, and control tool
that is used to configure the Advanced VSAT Network and
respond to network anomalies.
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Appendix G. WAN/RAN
OPTIMIZATION
G.1
Overview
The CDM-840 Remote Router supports E1 RAN (Radio Access Network) Optimization as a FAST
option. This appendix provides detailed information about Comtech EF Data’s patent pending
RAN Optimization technology, which is designed to provide maximum savings while maintaining
superior voice quality.
G.1.1 Radio Access Network (RAN)
Figure G-1 illustrates typical 2G and 3G Radio Access Networks.
Figure G-1. 2G / 3G Radio Access Network (RAN)
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Appendix G
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In the cellular network, the RAN connects cell-site nodes with central-site nodes:
•
For Global System for Mobile Communications (GSM) / 2G, the Base Transceiver Stations
(BTS) connect to the Base Station Controllers (BSC) via the Abis interface. Voice, data and
signaling are transported over one or more E1s.
•
For Universal Mobile Telecommunications Systems (UMTS) / 3G, the NodeB connects to
the Radio Network Controller (RNC) via the “lub” interface. Voice, data and signaling are
transported over one or more E1s using Asynchronous Transfer Mode (ATM).
G.1.2 RAN Inefficiency
The 2G/3G RAN design is not efficient for satellite backhaul. For example, in the GSM Abis
interface shown in Figure G-2, the resource allocation is on a fixed basis (one or more E1s per
BTS), irrespective of the actual traffic. Within the E1, the Time Slots (TS) are dedicated to
signaling, voice and data per Transceiver (TRX).
Figure G-2. Typical Abis Map
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Appendix G
G.2
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E1 RAN Optimization
Jointly developed by Comtech EF Data, CEFD sister division Comtech AHA Corp., and CEFD
subsidiary Memotec Inc., RAN Optimization technology significantly reduces the Wide Area
Network (WAN) / satellite bandwidth required to carry an E1 bearer used for cellular backhaul.
RAN Optimization allows the transmit modem data rate to be reduced relative to the input
terrestrial data rate, thus allowing the transport of a user-selectable channel subset of bearer E1
using less bandwidth. In the receive direction, the data is restored to the E1 format for transport
over the G.703 E1 interface.
The process is designed to allow varying levels of optimization to accommodate the incoming
terrestrial data in the reduced modem data rate. Optimization performance depends on the
traffic profile and the difference between the terrestrial data rate (based on input timeslot
selection) and the transmit modem data rate. The optimization is performed in hardware for
optimal performance.
The user has complete control over the desired level of optimization by selecting the time slots
to be optimized, and the transmit modem data rate. Depending on the traffic profile, typical
bandwidth reduction of 30-35% can be achieved with little or no impact to the voice quality.
Users have the option to reduce WAN bandwidth by as much as 60% relative to the ingress data
rate – this allows the users to achieve desired bandwidth savings while maintaining desired
voice quality.
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G.2.1 Process Overview
Figure G-3. RAN Optimization (GSM Abis Interface)
On the transmit side, the process for RAN Optimization is summarized as follows:
•
The incoming 64 kbps Time Slots are de-multiplexed into Traffic Channels (TCH) ;
•
TCH are inspected in real-time to identify Signaling, Voice, Data, and Idle;
•
Idle TCH are removed;
•
Silence frames are removed from the Voice channel;
•
Signaling and Data TCH are compressed using lossless compression;
•
O&M frames are compressed using lossless compression;
•
Voice frames are compressed using lossless compression;
•
Pre-emptive Bandwidth Management to maintain service quality;
•
The optimized payload is sent to the modem for transmission.
On the receive side, this process is reversed, re-creating the E1 for transmission over the G.703
E1 interface.
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G.2.2 WAN Link Dimensioning and Pre-emptive Bandwidth Management
RAN traffic varies over time – variations during the day that peak at certain time(s), and longer
term variation as user density/profile(s) changes. The WAN link can be dimensioned to
accommodate the peak traffic, or it can be dimensioned to meet a statistically derived value
(e.g. average traffic).
Dimensioning the WAN link for peak traffic may not be economically viable. However,
dimensioning the WAN link for average traffic has its challenges. Specifically: What happens
when the optimized traffic exceeds WAN capacity?
Typical of most other vendors’ RAN optimization solutions, Figure G-4 shows the optimized Abis
traffic as a function of time, depending on the BTS traffic load. The red line is the pre-defined
WAN link capacity (assuming 35% target optimization). Each time the optimized Abis traffic
exceeds WAN capacity, packets are dropped and the voice quality degrades dramatically – even
leading to dropped calls or in the worst case, causing BTS drop.
Figure G-4. Optimized Abis Traffic without Pre-emptive BW Management
The simplistic packet drop employed by most vendors in case of WAN congestion has potentially
disastrous effects on voice quality and call handling – the results can include clicks, blank calls,
and eventually call drops, especially if the BCCH channel of the TRX is impacted. In the worst
case, it may even lead to BTS drop.
To compensate, most other vendor solutions are forced to over-dimension the WAN link, which
leads to significant inefficiencies. This methodology should not be acceptable to mobile
operators. A good RAN optimization solution should be nearly transparent, and should provide
the same level of service to the mobile customers as when there is no RAN Optimization while
providing a significant reduction in RAN transmission bandwidth.
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As implemented by Comtech EF Data, the superior method of handling WAN congestion is to
perform pre-emptive and selective voice packet discard. Comtech EF Data’s RAN Optimization
solution employs a sophisticated bandwidth management capability to maintain Service Quality.
The signaling and O&M traffic is always protected from being dropped in case of WAN
congestion – this ensures that the BTS/NodeB stays connected and synchronized. The
bandwidth manager smoothes peak traffic variation before the optimized RAN traffic reaches
the available WAN capacity – this mechanism maintains good voice quality while effectively
reaching the optimal target optimization rate.
Comtech EF Data’s patent pending algorithm on voice packet discard is designed to minimize the
impact on the voice quality. This results in superior voice quality and improved Service Quality
even at peak hour traffic load. Implementing a RAN optimization solution without such
capability serves little purpose.
Figure G-5. Optimized Abis Traffic with Pre-emptive BW Management
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G.2.3 Performance Monitoring
The RAN Optimizer collects detailed usage and performance statistics that are accessible using
the CDM-840 Web Server (HTTP) Interface Status | Statistics | Trending page (Figure G-6).
Viewable by selectable time spans, these graphs display information needed to monitor the link
performance and to take appropriate action as needed.
See Chapter 6. ETHERNET-BASED REMOTE PRODUCT MANAGEMENT for more
information about the CDM-840 Web Server (HTTP) Interface and use of the
‘Status | Statistics | Trending’ page.
Figure G-6. Status | Statistics | Trending Page
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G.2.3.1 Traffic Throughput (kbps)
This graph illustrates the utilization of all available data traffic types over a 20-minute, 3-day, or
30-day time span (this example shows the graph with the 20-minute time span selected).
Note the following:
G.2.3.2
Type
Description
WAN E1
WAN data rate associated with E1/RAN traffic
WAN IP
WAN data rate associated with IP traffic
WAN Total
WAN data rate total (WAN E1 + WAN IP)
E1 Ingress
Data rate of E1 time slots carried (64K * number of time slots)
Traffic Ether Ingress
Data rate of Ethernet traffic
Modem Tx Datarate
Modem transmit data rate
RAN Link Quality
This graph illustrates the performance indicator for the Tx RAN Link Quality metric, a qualitative
measure of the voice quality predicated by a) the level of compression, and b) voice packet
discard required to accommodate the incoming traffic into the available WAN (satellite)
bandwidth. The display is selectable for a 20-minute, 3-day, or 30-day time span (this example
shows the graph with the 20-minute time span selected).
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Appendix G
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Association of the Link Quality Metric to its comparative Link Quality is as follows:
Link Quality Metric
8
7
6
5
4
3
2
1
Link Quality
Excellent
Very Good
Good
Fair
Average
Poor
Very Poor
Note that ‘8’ on the graph indicates the highest quality, with no voice traffic discard.
G.2.3.3
RANOp Savings
This graph illustrates the performance indicator for Tx RAN Optimization on an actual
“percentage of savings” basis over a 20-minute, 3-day, or 30-day time span (this example shows
the graph with the 20-minute time span selected).
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Appendix G
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Notes:
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