SpectraComm 5553 - General DataComm

GDC 076R108-000
Issue 4 - March 1998
Installation & Operation
SpectraComm 5553
Fractional T1
Data Set Emulator
General DataComm
Warning
This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance
with the instruction manual, may cause interference to radio communications. It has been tested and found to comply
with the limits for a Class A computing device pursuant to CISPR 22 which is designed to provide reasonable
protection against such interference when operated in a commercial environment. Operation of this equipment in a
residential area is likely to cause interference, in which case the user at his own expense will be required to take
whatever measures may be required to correct the interference. The user is cautioned that any changes or
modifications not expressly approved by General DataComm void the user’s authority to operate the equipment.
This digital apparatus does not exceed Class A limits for radio noise emissions from digital apparatus described in
the Radio Interference Regulations of the Canadian Department of Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils
numériques de la classe A prescrites dans le Règlement sur le brouillage radioélectrique édicté par le ministère des
Communications du Canada.
Warranty
General DataComm warrants that its equipment is free from defects in materials and workmanship. The warranty
period is one year from the date of shipment. GDC's sole obligation under its warranty is limited to the repair or
replacement of the defective equipment provided it is returned to GDC, transportation prepaid, within a reasonable
period. This warranty will not extend to equipment subjected to accident, misuse, or alterations or repair not made
by GDC or authorized by GDC in writing. The foregoing warranty is exclusive and in lieu of all other warranties,
express or implied, including but not limited to, warranties of merchantability and fitness for purpose.
Trademarks and Patents
General DataComm, the General DataComm logo and the following are trademarks of General DataComm, Inc in
the United States and other countries: ACCULINE, ANALOOP, AUTOFRAME, BERT 901, DATACOMM
SECURE-PAK, DATALOOP, DIGIDIAL, ENmacs, FASTPRO, FIRST RESPONSE, GDC, GDC APEX,
GENERAL DATACOMM X-PRESS, GEN*NET, GEN*PAC, IMAGE*TMS, KILOMUX,
LAN*TMS,
MEGA*BRIDGE, MEGAMUX, MEGAMUX TMS, MEGANET, MEGASPLIT, MEGASWITCH, MEGAVIEW,
NETCON, NETSWITCH, NMC, QUIKSHIPPERS, SERVI-CHECK, SERVI-SNAP, WINmacs.
ANALOOP and DATALOOP respectively are protected by U.S. patents 3,655,915 and 3,769,454. All other products
or services mentioned in this document are identified by the trademarks, service marks, or product names as
designated by the companies who market those products. Inquiries concerning such trademarks should be made
directly to those companies.
Copyright
© 1998 General DataComm, Inc. All rights reserved.
P.O. Box 1299, Middlebury, Connecticut 06762-1299 U.S.A.
This publication and the software it describes contain proprietary and confidential information. No part of this
document may be copied, photocopied, reproduced, translated or reduced to any electronic or machine-readable
format without prior written permission of General DataComm, Inc.
The information in this document is subject to change without notice. General DataComm assumes no responsibility
for any damages arising from the use of this document, including but not limited to, lost revenue, lost data, claims by
third parties, or other damages. If you have comments or suggestions concerning this manual, please write to
Technical Publication Services or call 1-203-758-1811.
Table of Contents
Preface
1
Technical Overview
Description ........................................................................................................................... 1-1
Data Set Emulator.......................................................................................................... 1-1
Local Control and SNMP Network Management ......................................................... 1-1
SC 5553 Data Set Emulator Features ................................................................................... 1-2
Management ......................................................................................................................... 1-2
Application ........................................................................................................................... 1-2
2
Installation
Overview .............................................................................................................................. 2-1
SpectraComm Shelf.............................................................................................................. 2-1
Unpacking and Handling...................................................................................................... 2-2
Preoperational Check ........................................................................................................... 2-2
Power Up Test Sequence ............................................................................................... 2-2
Local Test/Self Test ....................................................................................................... 2-3
Installation Procedures ......................................................................................................... 2-3
Module Installation Procedures ..................................................................................... 2-3
Electrical Power Connection ......................................................................................... 2-3
Business Equipment Connections (DTE) ...................................................................... 2-3
DSE Addressing............................................................................................................. 2-4
Timing Options .............................................................................................................. 2-4
3
Operation
Overview .............................................................................................................................. 3-1
Controls and Indicators ........................................................................................................3-1
SpectraComm Shelf ....................................................................................................... 3-1
Terminal Interface ................................................................................................................ 3-4
Initiating a Terminal Interface Session.......................................................................... 3-4
Selecting a DSE (Shelf Inventory Screen ...................................................................... 3-5
Configuration ................................................................................................................. 3-6
Diagnostics .................................................................................................................... 3-9
Alarm Configuration...................................................................................................... 3-10
Monitor/Alarms ............................................................................................................. 3-12
Maintenance................................................................................................................... 3-13
Firmware Download ...................................................................................................... 3-15
GDC 076R108-000
ii
4
Table of Contents
Tests
Overview ..............................................................................................................................4-1
Terminal Interface Diagnostics Screen ................................................................................4-2
Local Test .............................................................................................................................4-4
Local Test with Self-Test .....................................................................................................4-6
End-to-End Self Test ............................................................................................................4-8
Remote Loop ........................................................................................................................4-10
Remote Loop with Self-Test ................................................................................................4-12
Data Loop .............................................................................................................................4-14
A
Technical Characteristics
B
DTE Interface Signals
C
SC 5553 MIB Support
Overview ..............................................................................................................................C-1
SC 5553 MIB Tables ............................................................................................................C-11
Index
GDC 076R108-000
Table of Contents
iii
Figures
2-1
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
SpectraComm Shelf Back Panel.................................................................................2-2
Front Panel Indicators.................................................................................................3-2
Front Panel Controls...................................................................................................3-3
Configuration Screen, with Default Settings..............................................................3-6
Diagnostics Screen .....................................................................................................3-9
Alarm Configuration Screen.......................................................................................3-11
Monitor/Alarms Screen ..............................................................................................3-12
Maintenance Screen....................................................................................................3-13
Firmware Download Screen .......................................................................................3-15
Fault Isolation Procedure............................................................................................4-2
Diagnostics Screen .....................................................................................................4-3
Local Test ...................................................................................................................4-5
Local Test with Self-Test ...........................................................................................4-7
End-to-End Self Test ..................................................................................................4-9
Remote Loop ..............................................................................................................4-11
Remote Loop with Self-Test ......................................................................................4-13
Data Loop ...................................................................................................................4-15
1-1
3-1
3-2
B-1
B-2
C-1
C-2
C-3
C-4
C-5
C-6
C-7
C-8
Equipment List ...........................................................................................................1-3
SC 5553 Configuration Option Settings.....................................................................3-8
SC 5553 Diagnostic Configuration Option Settings ..................................................3-10
ITU-T V.35 DTE Interface Signals ............................................................................B-2
EIA-530 DTE Interface Signals .................................................................................B-3
GDC Common MIB Tables........................................................................................C-1
Version Table .............................................................................................................C-1
DS0 Allocation Table .................................................................................................C-2
Configuration Table....................................................................................................C-4
DTE Signal Status Table ............................................................................................C-6
Diagnostics Table .......................................................................................................C-8
Maintenance Table .....................................................................................................C-11
Alarm Object Identifier Definitions Table .................................................................C-12
Tables
GDC 076R108-000
Preface
Scope
This manual describes how to install and configure a General DataComm SC 5553 Data Set Emulator. It is written for installers, service technicians, and users. It assumes a working knowledge
of data interfaces, T1 and fractional T1 transmission services, and the Simple Network Management Protocol (SNMP).
Revision History
This is Issue 4 of the manual. It has been revised to include information on the addition of firmware download functionality.
Revisions in Issues 2 and 3 provided information on the addition of terminal interface (Telnet)
functionality and the front panel LED test.
Organization
This manual has four chapters and three appendices. The information is arranged as follows:
•
Chapter 1 - Technical Overview describes the Data Set Emulator, its features, and its
options. This chapter contains the Equipment List table.
•
Chapter 2 - Installation provides directions for installing the DSE in a SpectraComm Shelf
and making the cable connections it requires.
•
Chapter 3 - Operation describes the DSE front panel controls and indicators, and their use;
provides directions for controlling and monitoring the DSE by means of the terminal
interface and for performing firmware download.
•
Chapter 4 - Tests describes tests that can be performed on the DSE. Tests can be
administered by means of the DSE front panel controls, the terminal interface, or an SNMP
controller.
•
Appendix A- Technical Characteristics
•
Appendix B- DTE Interface Signals lists pin/signal assignments for the two DTE interfaces
that the DSE can support: ITU-T V.35 and EIA-530.
•
Appendix C- SC 5553 MIB Support consists of tables defining the Management
Information Base (MIB) objects that enable SNMP control of the DSE and its remote
DSUs.
GDC 076R108-000
vi
Preface
Document Conventions
Level 1 paragraph headers introduce major topics.
Level 2 paragraph headers introduce subsections of major topics.
Level 3 paragraph headers introduce subsections of secondary topics.
This typewriter font shows output that is displayed on the screen.
This bold font shows specific input that you type at the keyboard.
This bold italicized font shows variable input that you type at the keyboard.
Notes present special instructions, helpful hints or general rules.
NOTE
Related Publications
The following document has additional information that may be helpful when using this product:
•
TEAM 5553 Operation
GDC 058R725-V110
GDC publication numbers (e.g., GDC 032R101-000) are used to track and order technical manuals. Publication numbers use the following format:
GDC NNNRnnn-000 or GDC NNNRnnn-Vnnn
•
NNN
identifies the product family (e.g. SC 5000 system)
•
R
denotes a technical publication
•
nnn
a number assigned by Technical Publications
•
000
identifies a hardware product and does not change
The Issue Number changes when a hardware manual is revised or when a manual is reprinted with
additional material.
Service and Support
General DataComm is committed to providing the service and support needed to install, manage,
and maintain your equipment. For information about service programs or for assistance with your
support requirements, contact your local Sales Representative or call General DataComm Service
at the 24-hour, toll-free number listed below.
•
in the U.S. dial 1-800-243-1030
•
outside the U.S. dial 1-203-598-7526
Be ready with the site name and phone number, and a description of the problem. The next available support representative will promptly return your call.
Hands-on training courses are provided by GDC Educational Services. Courses range from basic
data communications, modems and multiplexers, to complex network and ATM systems and are
taught in Connecticut or at a customer location. To discuss educational services or receive a
course schedule, call 1-800-243-1030 and follow the menu instructions.
GDC 076R108-000
Preface
vii
Safety Instructions
Antistatic Precautions
Electrostatic discharge (ESD) results from the buildup of static electricity and can cause computer
components to fail. Electrostatic discharge occurs when a person whose body contains a static
buildup touches a computer component.
The equipment may contain static-sensitive devices that are easily damaged, so proper handling
and grounding are essential. Use ESD precautionary measures when installing parts or cards, and
keep the parts and cards in antistatic packaging when not in use. If possible, use antistatic floor
pads and workbench pads.
When handling components or setting switch options always use an antistatic wrist strap connected to a grounded equipment frame or chassis. If a wrist strap is not available, periodically touch
an unpainted metal surface on the equipment. Never use a conductive tool, such as a screwdriver
or a paper clip, to set switches.
Safety Guidelines
The following symbols are used in this manual to draw your attention to potential hazards. A Caution indicates a hazard to equipment or data. A Warning indicates a hazard to personnel.
Caution statements identify conditions or practices that can result in
damage to the equipment or in loss of data.
Warning statements identify conditions or practices that can result in
personal injury or loss of life.
Always use caution and common sense. To reduce the risk of electrical shock, do not operate any
equipment with the cover removed. Repairs must be performed by qualified service personnel
only.
GDC 076R108-000
viii
Preface
Glossary of Terms
Backplane Data Highway
High speed bus built into the SpectraComm Shelf backplane to support the exchange of data and
timing signals between a line terminating unit and up to 24 data set emulators. The backplane contains four data highways. Two shelves, and their data highways, can be connected by daisy-chain
cables so that a total of 32 shelf slots are supported.
Data Set Emulator (DSE)
Term for the units in the SpectraComm 5000 system that provide DTE interface functions. Each
DSE is designed to be compatible with a GDC device that can be installed as a standalone unit at
a remote site. An SC 5553 DSE, for example, is compatible with a remote NMS 553 DSU.
Line Terminating Unit
Term for the unit in the SpectraComm 5000 system that provides network interface functions.
GDC 076R108-000
1 Technical Overview
Description
The SC 5553 Data Set Emulator (DSE) is part of the SpectraComm 5000 family of products from
General DataComm. An SC 5000 system consists of DSEs to provide interface functions for data
terminal equipment (DTEs) and one or more Line Terminating Units (LTU) to provide network
interface. The system consolidates data traffic between a user-owned central data communication site and a Telco central switching office, and enables the use of a single, high-capacity line.
Unlike a multiplexer, which consolidates data traffic for transmission over a point to point link,
the SC 5000 system performs "line grooming" that permits the switching office to separate the
signal back into its component parts for transmission to multiple locations.
Data Set Emulator
The SC 5553 DSE is termed a data set emulator rather than a DSU because, instead of including
its own network interface circuitry, it interfaces with an SC 5001 LTU. The LTU provides interface to a T1 line and can support up to 24 DSEs installed, with the LTU, in a pair of SpectraComm Shelves. The DSEs and LTU exchange channel data by means of a data highway
implemented in the SpectraComm Shelf backplane. The backplane provides four data highways,
so a pair of SpectraComm Shelves (32 slots, total) can accommodate up to four LTUs, each with
its own group of associated DSEs.
The SC 5553 DSE printed circuit (pc) card provides the channel interface functionality of a fractional T1 DSU. It interfaces DTE data to the SC 5000 shelf backplane at any rate from 56 kbps
to 1536 kbps. The DSE uses as many time slots on the backplane data highway as the selected
rate requires; from one timeslot for a 56 or 64 kbps channel, up through 24 timeslots for a 1536
kbps channel (24 x 64 kbps). Twenty-four timeslots represent a full T1 connection. Each timeslot
on an SC 5000 backplane data highway is equivalent to one DS0 on a T1 line.
Local Control and SNMP Network Management
In addition to DSEs and LTUs, each SC 5000 system includes a GDC SpectraComm Manager
(SCM) card to provide comprehensive network management capabilities using the Simple Network Management Protocol (SNMP). The SCM card acts as the local control device for the other
components of the SC 5000 system under the direction of an SNMP controller.
The DSE is software controllable. You can configure data set options from an SNMP manager
at a central site. You can also perform diagnostic testing and alarm management.
The basic SC 5553 DSE is a 7-inch by 9.5-inch (178 mm by 241 mm) pc card. It conforms to the
unique GDC SpectraComm packaging concept that enables a variety of data communication
products to be mounted in the same high-density shelf. Each 16-slot shelf can hold 16 single card
devices.
Table 1-1 defines part numbers for standard and optional equipment available for the SC 5553
DSE. Appendix A lists its technical characteristics.
GDC 076R108-000
1-2
Technical Overview
SC 5553 Data Set Emulator Features
The SC 5553 DSE provides the following features:
•
Supports T1 and fractional T1 data rates from 1536 kbps (64 kbps x 24 DS0s) down to 56
kbps (56 kbps x 1 DS0).
•
Communicates with SNMP controller through the shelf-resident SpectraComm Manager
(SCM) card for comprehensive, non intrusive network management.
•
Functions fully under Simple Network Management Protocol (SNMP) network
management, which provides complete software control for configuration, alarm reporting,
and diagnostic testing capabilities.
•
Provides terminal interface control functions accessible through the SCM by an ASCII
terminal or a computer running the Telnet protocol
•
Hardware selectable DTE interface conforms to either ITU-T V.35 or EIA-530.
•
Compatible with remote NMS 553 DSUs for transmission and reception of user data.
•
Stores operating firmware in flash based memory that supports downloading of new
application firmware by means of TFTP for upgrades
•
Supports dual application firmware storage, with user control of switchover between active
and standby firmware versions
Management
As an SNMP controlled device, the SC 5553 receives configuration and commands in the form
of entries in its Management Information Base (MIB) tables. The SCM card stores and administers MIBs for the DSEs and LTUs in its SpectraComm Shelf. The SCM card communicates with
an SNMP controller, and passes commands and responses between the controller and the DSE.
Diagnostic testing performed through SNMP does not require intervention by personnel at remote
sites. The operator can select Alarm reporting to occur on any of the following conditions:
EEPROM Checksum failure RXD No Transitions
Front Panel Test
DCD Loss
TXD No Transitions
DSR Loss
Timing (Shelf) loss
DTR Loss
DTR Loss
TxC (Ext. Clock) loss
DTE Test
The DSE facilitates fault isolation in a digital network by providing comprehensive loopback and
testing capabilities, that include Local Test, Remote Loop, Data Loop and Self-Test. The operator
can use these loopbacks and tests to isolate system faults to a particular DTE, data set, or line.
Application
The SC 5553 DSE works in conjunction with the SC 5001 LTU to provide a groomed T1 environment. The SC 5000 system grooms the local end of multiple DDS circuits into a single T1 aggregate. Refer to GDC Publication No. 076R100-000 for specific details on the SC 5001 LTU.
The SC 5553 DSE is compatible with a remote NMS 553 DSU.
GDC 076R108-000
Technical Overview
Table 1-1
1-3
Equipment List
Description
GDC Part No.
GDC SC 5553 Data Set Emulator
076P019-001
Shelves
SpectraComm Shelf MS-2 Model 1 (100/120 V ac)
Includes two 8-slot, dual RJ48 Zone 1 connector panels
010M054-001
SpectraComm Shelf MS-2 Model 2 (-48 V dc)
Includes two 8-slot, dual RJ48 Zone 1 connector panels
010M055-001
SpectraComm Shelf MS-2 Model 10 (-48 V dc, with redundant power supplies) 010M070-001
Includes two 8-slot, dual RJ48 Zone 1 connector panels
Unless otherwise stated, systems include one base shelf, one power supply and one power supply blank
front panel, Zone 1 connector panels as stated, one 16-slot DB25 Zone 3 connector panel, two standard
mounting brackets (19-/23-inch), and assorted mounting hardware.
Connector Panels
Kit, Zone 1, 8-slot Blank Rear Panel (Z1-S-B)
010K341-001
Kit, Zone 1, 8-slot dual RJ45 connector panel (Z1-S-16DRJ45)
010K342-001
Kit, Zone 3, 16-slot DB25 connector panel (Z3-S-16DB25)
010K339-001
Cables
V.35 Male-to-Male, Straight Through Cable
027H516-XXX*
DB25 Male/V.35 Female Adapter Cable
027H572-001
EIA-530/442 (25-pin male) to EIA-422/449 (37-pin female) Adapter Cable As- 027H501-001
sembly
EIA/TIA-232-E Male-to-Male, Straight Through Cable
028H502-XXX*
EIA/TIA-232-E Male-to-Female, Straight Through Cable (Shielded)
028H506-XXX*
Manuals
Operating and Installation Instructions for SpectraComm Shelf
010R302-000
Operating and Installation Instructions for SpectraComm Manager Card
048R303-000
* XXX represents three digits which indicate cable length in the actual part number.
GDC 076R108-000
2 Installation
Overview
This chapter describes the installation of the SC 5553 DSE.
The SC 5553 DSE is shipped pre-assembled, tested, and ready to use. Its one hardware option,
DTE interface selection, is set in its default position, V.35, when the unit is shipped.
The normal procedure after unpacking the unit is to insert it in its intended shelf slot and perform
the Preoperational Check described in this chapter. When the test is successfully completed you
may make the DSE cable connections.
The SC 5553 DSE should be installed in a ventilated area where the ambient temperature does
not exceed 122°F (50°C). Do not install the DSE above other equipment that generates large
amounts of heat (e.g., power supplies).
SpectraComm Shelf
A rack-mountable SpectraComm Shelf can house up to 16 plug-ins. It fits into 19- and 23-inch
wide equipment racks. The backplanes of two shelves can be linked by cables so that a total of
32 card slots function as though connected to the same backplane. The SC 5553 DSE can be installed in any card slot.
The shelf backplane is made up of four separate "data highways" and a management bus. Each
data highway supports the transfer of data between an LTU and its DSEs, so there can be up to
four LTU/DSE functional groupings in a shelf (or pair of shelves). The management bus supports the transfer of management data between an SCM card and the DSEs and LTUs in the shelf.
The SCM card functions as an SNMP agent for the control of compatible devices, such as the
DSE and LTU, in the shelf. The SpectraComm Shelf can contain a single SCM card, or two SCM
cards installed as a primary and a backup.
An LTU/DSE functional group can consist of one or two LTUs (one primary and one backup)
and up to 24 DSE cards. The application determines the exact selection of pc cards to be installed
in a shelf. An LTU can be combined with 24 DSE channels only when each channel requires just
a single DS0. The number of DSE cards the LTU can support is reduced when channels employ
N X 56 Kbps or N X 64 Kbps rates. For example, the LTU can support no more than 12 DSE
cards when each DSE is providing a 128 Kbps channel.
Two SC 5001 LTUs can be installed in a primary/secondary arrangement. If the primary LTU
malfunctions, the SNMP controller can command the secondary LTU to take over.
Figure 2-1 shows the SpectraComm Shelf back panel. An SC 5553 DSE employs only one back
panel connector: the DB25 connector in Zone 3 serves as its DTE interface.
GDC 076R108-000
2-2
Installation
J50: Shelf address
jumper
J51: 40-pin signal
bus connector
Zone 1
Zone 2
Zone 3
J49: 50-pin power
bus connector
J52: 30-pin signal
bus connector
16-slot Zone 3 connector panel shown
with one DB25S connector (J1 to J16) per slot.
DTE cable for SC 5553 DSE attaches to
DB25 that corresponds to the slot containing
the DSE.
Figure 2-1
Slot B Slot A
Power
supply
section
SpectraComm Shelf Back Panel
Unpacking and Handling
The SC 5553 DSE is shipped enclosed in a corrugated box and protected by packing material.
Inspect the SC 5553 DSE when you receive it. Notify the shipper of any damage immediately.
Keep the box and packing material to use if you ever need to reship the SC 5553 DSE.
Preoperational Check
You should verify that the SC5553 is in good working order by means of two tests: the Power Up
Test that the unit performs automatically, and a Local Test with Self Test that you perform using
the front panel controls.
Power Up Test Sequence
Inserting the SC 5553 into the shelf automatically initiates a four-part Power Up Test, which you
should observe by watching the front panel during power up. The following four events verify
that the SC 5553 DSE is in good electrical working order:
1.
All LEDs and all segments of the 4-character, 7-segment LCD display light and are easily visible.
2.
The SC 5553 front panel displays "SELF" and lights the TM LED to indicate the start of an
internal diagnostic test of the circuitry.
3.
The front panel displays "PASS" to indicate success of the internal diagnostic test.
4.
The front panel displays "5553" product name following the results of the internal diagnostic test.
GDC 076R108-000
Installation
2-3
If any of those four events does not occur, or if "FAIL" is displayed instead of "PASS" there is a
problem with the unit. Install a spare unit if one is available. If you require assistance, contact
General DataComm Service at the toll-free telephone number listed in the Preface of this manual.
Do not attempt to repair the SC 5553 DSE.
Local Test/Self Test
Once the SC 5553 DSE has passed the Power Up Test and before you connect it to its DTE, you
should perform a Local Test with Self Test to verify that the internal circuits of the DSE are capable of normal operation. Local Test causes the DSE to loop transmit data back as receive data.
Self Test enables both an internal Test Pattern Generator to provide a signal for the test loop and
a Test Pattern Checker to verify the signal.
1. Make sure that the front panel LCD display is showing a value other than 0000 to indicate
that there is bandwidth selected for the DSE. Make sure, also, that there is a source of Shelf
Timing for the shelf in which the DSE is installed. The DSE will not perform the test if these
two conditions are not satisfied.
2. Initiate the test by briefly pressing the LT (Local Test) and Self Test (ST) switches on the
front panel. The LT, ST, and TM (Test Mode) indicators are On during the test.
3. Run the test for approximately 15 seconds.
4. The TM indicator blinks when an error is detected. The test should run entirely error-free.
5. If the test is successful, the TM indicator remains On until you end the test by depressing the
LT and ST buttons a second time.
If errors are detected during this test there is a problem with the unit. Install a spare unit if one is
available. If you require assistance, contact General DataComm Service at the toll-free telephone
number listed in the Preface of this manual. Do not attempt to repair the SC 5553 DSE.
Installation Procedures
Module Installation Procedures
An SC 5553 DSE card may be installed in any slot in a SpectraComm Shelf. To install the DSE
card in the shelf:
1.
Insert the module into its slot with the GDC logo on top, then slide it in until it makes contact.
2.
Pull down the ejector tab and firmly push the module in until it seats in the rear connectors.
Electrical Power Connection
The DSE obtains power directly from the SpectraComm shelf.
Business Equipment Connections (DTE)
The SC 5553 DSE supports two business equipment interfaces: ITU-T V.35 and EIA-530. The
interfaces are selectable by hardware jumpers on the DSE pc card.
Appendix B describes the signals exchanged through each of the business equipment interfaces.
GDC 076R108-000
2-4
Installation
DSE Addressing
The network management system employs a slot-line-drop method of addressing. The DSE slot
address is determined by its position in the SpectraComm Shelf, and it is Line 1, Drop 0 for that
slot. The remote DSU that the DSE is linked to is Drop 1 for the slot and line.
If the firmware is ever changed on the SC 5553 DSE, the EEPROM containing configuration for
the DSE is automatically erased and the unit has to be reconfigured.
Timing Options
Timing options determine the clock source for the data the SC 5553 DSE transmits to the network. The default Transmit Timing option for the DSE is Receive timing.
The precise meaning of Receive timing for the DSE differs from that for a DSU because of the
relationship between components in the SC 5000 system. In an SC 5000 system the selection of
Receive timing actually means the use of a system shelf timing signal taken from the shelf backplane. A DSU derives Receive timing directly from the signal it receives at its network interface.
The SC5000 MIB, detailed in Appendix C, enables or inhibits the DSE as the source of the 8 KHz
system shelf timing signal on the backplane. One component in each SC 5000 system, either a
DSE or an LTU, may be configured to provide the 8 KHz signal. The MIB also controls the source
of a second, 4 MHz, backplane timing signal that only an LTU can provide.
A DSE that is providing the 8 KHz system shelf timing signal must itself employ External transmit timing. All other DSEs in the system must be configured for Receive timing so that they use
the system shelf timing signal.
GDC 076R108-000
3 Operation
Overview
This chapter describes the functions of the SC 5553 DSE front panel indicator displays and limited test functions.
A Simple Network Management Protocol (SNMP) controller is responsible for all other operations of the SC 5553 DSE. The controller provides capabilities for:
•
Alarm management
•
Configuration
•
Control
•
Diagnostics
Consult the manual for your SNMP controller for detailed instructions on the use of its functions.
This manual provides information specific to the SC 5553 DSE, in particular the MIB tables contained in Appendix C, as a supplement to those instructions.
Controls and Indicators
Figures 3-1 and 3-2 illustrate the SC 5553 DSE front panel and explain the function of each control and indicator.
SpectraComm Shelf
The manual supplied with the SpectraComm shelf describes front panel controls, indicators, and
fuses for the shelf.
GDC 076R108-000
3-2
Operation
In Service Lit when the DSE has
been placed into service
by the network controller
Send Data Lit when the DSE is in data
mode and a space is detected
in the transmit data.
Power On Lit while power is
applied to the DSE
INS
ON
SD
RD
RS
CO
TMG
RSP
Carrier On Lit at all times except when the
DSE is in Self Test or Digital
Loopback with the constant DCD
option disabled.
Request to Send Lit when the RTS is
asserted by the DTE
Timing Lit when the DSE is
designated as the
source of timing for
its shelf (8Kclock)
TM
Test Mode Lit when the DSE is
performing any type
of test.
Blinks to indicate
detected errors during a Self Test.
Received Data Lit when the DSE is in data
mode and a space is detected in the receive data
ST
LT
ALM
Response Lit while the DSE is in
transmitting a response to a network
controller command
Rate Display Displays the current DSE
data rate in kbps.
RL
DL
Alarm Flashes while the DSE is
experiencing an alarm
condition
Green
Red
5553
Figure 3-1
GDC 076R108-000
Front Panel Indicators
Operation
3-3
INS
ON
SD
RD
RS
CO
TMG
RSP
Local Test Momentary switch. When pressed,
places the DSE in Local Test. LED is lit
while the test is in progress. Press
switch a second time to end test. Local
Test is a unilateral loopback toward
the DTE.
TM
ST
LT
RL
Remote Loop Momentary switch. When pressed,
causes the DSE to send a PN127 loopback command to the remote unit. The
DSE can perform a remote loopback
test with any compatible device that
recognizes the command. LED is lit
while the test is in progress. Press
switch a second time to end test.
DL
ALM
Self Test Momentary switch. When pressed, engages the test pattern generator/
checker employing test pattern selected in configuration. LED is lit while Self
Test is active. Press switch a second
time to turn off Self test.
Data Loop Momentary switch. When pressed,
places the DSE in a digital loopback.
LED is lit while test is active. Press
switch a second time to end test.
Green
Red
5553
Figure 3-2
Front Panel Controls
GDC 076R108-000
3-4
Operation
Terminal Interface
Access to the SC 5553 DSE terminal interface takes place through the SCM, which provides this
functionality for the DSEs installed with it in a SpectraComm shelf or a pair of shelves connected
by daisy chain cables. One SCM, then, supports interface functions for up to 15 units in a single
shelf or up to 31 units in a pair of shelves.
The SC 5553 DSE requires firmware revision level B- or higher to support the terminal interface
functionality.
Initiating a Terminal Interface Session
The first portion of a terminal interface session varies depending on whether you’re using a
VT100-compatible terminal connected directly to the SCM front panel or a computer with a
Telnet connection to the SCM LAN port.
VT100-compatible Terminal
When you connect a terminal to the SCM front panel, the following screen is the first to appear
Main Menu
1. IP Address
2. Passwords
3. Element Access
4. Test
Next Selection:
Type 3 and press the Enter key. The screen then displays the Shelf Inventory screen that appears
below.
The other selections in this menu all relate to SCM functionality. They are discussed in the
SpectraComm Manager Card Installation and Operation Manual, GDC Publication Number
048R303-000.
Telnet Connection
The SpectraComm Manager Card Installation and Operation Manual, GDC Publication Number
048R303-000 explains how to establish a Telnet connection to the SCM LAN port. When you do
so, the following screen is the first to appear
Copyright (c) 1993-1997 General DataComm Industries Inc.
All rights reserved
SCM Application Version 3.21
login:
GDC 076R108-000
Operation
3-5
After you enter the login password the screen displays the Shelf Inventory screen that appears
below.
NOTE
There is a 10-minute timeout on the terminal interface. If you allow 10
minutes to pass with no activity, that is without pressing any key on the
keyboard, the DSE terminates the session. At that point the display
returns to the SCM Main Menu if you are using a terminal connected
to the SCM front panel, or to the SCM login screen if you are using a
Telnet connection.
Selecting a DSE (Shelf Inventory Screen)
From this point, procedures are the same for both types of connection. The Shelf Inventory screen
below is for a two-shelf installation in which both shelves are filled with SC 5553 DSEs. The two
columns for Slots 17 through 32 do not appear when there is only one shelf.
SHELF INVENTORY
Slot
Card
Slot
Card
------------------------------------------------[1]SCM
[17]SC5553
[2]SC5553
[18]SC5553
[3]SC5553
[19]SC5553
[4]SC5553
[20]SC5553
[5]SC5553
[21]SC5553
[6]SC5553
[22]SC5553
[7]SC5553
[23]SC5553
[8]SC5553
[24]SC5553
[9]SC5553
[25]SC5553
[10]SC5553
[26]SC5553
[11]SC5553
[27]SC5553
[12]SC5553
[28]SC5553
[13]SC5553
[29]SC5553
[14]SC5553
[30]SC5553
[15]SC5553 (alarm)
[31]SC5553
[16]SC5553
[32]SC5553
[0]Close Session
Enter slot number:
[
]
The Shelf Inventory displays the word "alarm" in parentheses next to the name of any unit that
currently has an active alarm condition.
Type the slot number of the unit you intend to work with, and press the Enter key. The DSE
responds by displaying the SC 5553 Main Menu as shown below.
GDC 076R108-000
3-6
Operation
S C
5 5 5 3
SHELF SLOT = 5
[1] Configuration
[2] Diagnostics
[3] Alarm Configuration
[4] Monitor/Alarms
[5] Maintenance
[0] Return to Shelf Inventory
Select: [ ]
Type the number that corresponds to the function with which you intend to work.
Configuration
The Configuration function presents a screen of configuration options. Each option is identified
by a selection number or letter, and displays its current setting.
SC 5553 Configuration
Network:
Shelf Timing:
Disable
DS0:
Data Highway:
Aggregate Rate:
DCC DS0:
One
0000 Kbps (0 DS0)
None
[1]
[2]
N x 56k
None
[3]
[4]
[5]
[6]
[7]
[8]
Format:
Diagnostic Comm. Channel:
DTE:
Data:
Timing (Clock Invert):
External Clock:
Constant DSR:
Constant DCD:
RTS/CTS Control:
[0] Return to Main Menu
Select: [ ]
Figure 3-3
GDC 076R108-000
TxD Norm RxD Norm
TxC Norm RxC Norm
Disable
Enable
Enable
RTS Forced ON
[S] Save & Update Unit
Configuration Screen, with Default Settings
Operation
3-7
The procedure for changing configuration option settings involves the following steps:
1. Type the selection number or letter of the option you intend to change, and press the Enter
key. Highlighting appears on the current setting field for the corresponding option.
2. Use the arrow keys to toggle the highlighted field through its potential settings.
3. When the field displays the desired setting, press the Enter key again. The highlight returns
to the Select field.
4. Repeat steps 1 through 3 for each option you need to change.
5. After you’ve made all required changes, type selection S, Save & Update Unit and
press the Enter key. In response the prompt ARE YOU SURE (Y/N)? appears.
6. If you are certain that your changes are correct, type Y and press the Enter key to put the
changed configuration into effect in the DSE.
If you decide not to put your changes into effect, type N and press the Enter key. You can then
either make further changes or proceed to dismiss the screen.
7. To dismiss the Configuration screen, type selection 0, Return to Main Menu, and press
the Enter key. If there are no unsaved changes the display returns to the SC 5553 Main Menu
and the configuration procedure is complete.
8. If there are unsaved changes when you attempt to dismiss the Configuration screen, the
prompt Pending Edits, Exit without saving (Y/N)? appears. You can type
Y and press the Enter key to dismiss the screen and discard the unsaved changes. If you type
N and press the Enter key, the Configuration screen remains on display so that you can perform a Save or make further changes before you type 0 again to dismiss the screen.
Table 3-1 lists the configuration options that appear on the terminal interface display and all the
settings available for each.
Three items that appear on the Configuration screen are display-only:
Data Highway – the Backplane Control/Highway Configuration function of the SCM
card determines which data highway the SC 5553 DSE uses to exchange
data with its LTU.
Aggregate Rate – the Backplane Control/Highway Configuration function of the SCM
card determines how many timeslots/DS0s the SC 5553 DSE uses to
exchange data with its LTU on the data highway; the resulting
Aggregate Rate depends on the selected Format (N x 56k or N x 64K)
and on whether or not DCC DS0 has been selected for Diagnostic
Comm. Channel.
DCC DS0 –
displays None unless DCC DS0 has been selected for Diagnostic
Comm. Channel. When that selection is made, this displays the number
of the DS0 being used as the Diagnostic Communication Channel. That
DS0 is the last one in the group assigned to the DSE by the Backplane
Control/Highway Configuration function of the SCM card, and the
Aggregate Rate is reduced by one DS0. You cannot select DCC DS0 for
Diagnostic Comm. Channel unless there are at least two DS0s assigned
to the DSE.
GDC 076R108-000
3-8
Operation
Table 3-1
SC 5553 Configuration Option Settings
Option
Potential Settings
[0] Return to Main Menu
Network:
Shelf Timing: (Display Only)
Disable
Enable
DS0:
Data Highway:
(Display Only)
One
Two
Three
Four
Aggregate Rate:
(Display Only)
56Kbps (1 DS0) through 1344Kbps (24 DS0s)
or
64Kbps (1 DS0) through 1536Kbps (24 DS0s)
DCC DS0:
(Display Only)
None
or
displays number (2 – 24) of DS0 assigned for
DCC when DCC DS0 is selected for Diagnostic
Comm. Channel
[1] Format
N x 56k (Default)
N x 64k
[2] Diagnostic Comm. Channel
None (Default)
Embedded (only with Format: N x 56k)
DCC DS0
DTE
[3] Data
TxD Norm RxD Norm (Default)
TxD Invert RxD Norm
TxD Norm RxD Invert
TxD Invert RxD Invert
[4] Timing (Clock Invert)
TxC Norm RxC Norm (Default)
TxC Invert RxC Norm
TxC Norm RxC Invert
TxC Invert RxC Invert
[5] External Clock
Disable (Default)
Enable
[6] Constant DSR
Enable (Default)
Disable (follows DTR)
[7] Constant DCD
Enable (Default)
Disable (Off during ST and DL tests)
[8] RTS/CTS Control
RTS Forced ON (Default)
Std. (40 Bit Delay)
10 msec Delay
GDC 076R108-000
Operation
3-9
Diagnostics
The terminal interface SC 5553 Diagnostics screen combines configuration and command
functions. Selections 1 through 5 are configuration options that affect DSE diagnostic
functionality. Changes to the options don’t go into effect until you save them to the unit. Once
saved, they remain in effect until new changes are made and saved.
Selections 6 through B are command fields by which you can begin and end test procedures. The
Test Results field below selection B displays the results of tests that employ Self Test. The result
is either Passed, if no errors are detected, or the number of RX Errors.
Figure 3-4 illustrates the Diagnostics screen. Detailed instructions for setting its configuration
options follow the illustration. Instructions for using the screen to perform tests appear in Chapter
4, Tests, together with descriptions of the diagnostic functions.
SC 5553 Diagnostics
Diagnostic Options
DTE:
[1]
Local Loopback Control:
[2]
Remote Loopback Control:
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[A]
[B]
Disable
Disable
Network:
Remote Loop (PN127) Response: Enable
Remote Loop Auto Timeout:
Disable
Self Test Pattern:
511
T E S T S:
Local Loopback:
Local Loopback & Self Test:
Remote Loopback (PN127):
Remote Loopback & Self Test:
Digital Loopback:
Self Test:
Test Results:
[0] Return to Main Menu
Select: [ ]
Figure 3-4
Idle
Idle
Idle
Idle
Idle
Idle
Passed
[S] Save [1] - [5] & Update Unit
Diagnostics Screen
The procedure for changing Diagnostic configuration option settings involves the following
steps:
1. Type the selection number of the option you intend to change, and press the Enter key. Highlighting appears on the current setting field for the corresponding option.
2. Use the arrow keys to toggle the highlighted field through its potential settings.
3. When the field displays the desired setting, press the Enter key again. The highlight returns
to the Select field.
4. Repeat steps 1 through 3 for each option you need to change.
5. After you’ve made all required changes, type selection S, Save 1 - 9 & Update Unit
and press the Enter key. In response the prompt ARE YOU SURE (Y/N)? appears.
6. If you are certain that your changes are correct, type Y and press the Enter key to put the
GDC 076R108-000
3-10
Operation
changed configuration into effect in the DSE. You can then perform tests or proceed to dismiss the screen.
If you decide not to put your changes into effect, type N and press the Enter key. You can then
make further changes, perform tests, or proceed to dismiss the screen.
7. For instructions on performing tests, consult Chapter 4. To dismiss the Diagnostics screen,
type selection 0, Return to Main Menu, and press the Enter key. If there are no unsaved
diagnostic configuration changes, the display returns to the SC 5553 Main Menu and the procedure is complete.
Table 3-2 lists the Diagnostic configuration options that appear on the terminal interface display
and all the settings available for each.
Table 3-2
SC 5553 Diagnostic Configuration Option Settings
Option
Function
Potential Settings
DTE:
[1] Local Loopback Control:
[2] Remote Loopback Control:
If enabled, DTE can command Local
Loopback with interface signal
Disable (default)
Enable
If enabled, DTE can command Remote Disable (default)
Loopback with interface signal
Enable
Network:
[3] Remote Loop (PN 127)
Response
If enabled, remote unit can command Enable (default)
DSE into digital loopback with PN 127
Disable
signal
[4] Remote Loop Auto Timeout
Determines whether or not Remote
Loop ends automatically
[5] Self Test Pattern
Disable (default)
10 minute
511 (default)
2047
Alarm Configuration
The Alarm Configuration function presents a screen of configuration options that determine
which alarms the DSE is to report. Unit and DTE alarms can be individually designated either to
be reported when they occur or to masked (not reported). For definitions of the alarm conditions
consult the description of the Monitor/Alarms screen, which begins on page 3-12.
Each option on the Alarm Configuration screen is identified by a selection number or letter, and
displays its current setting.
GDC 076R108-000
Operation
3-11
SC 5553 Alarm Configuration
[R]
Report All Alarms,
[N] Report None
[1]
[2]
Unit:
Front Panel Test:
EEPROM Checksum:
Masked
Report
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[A]
DTE:
DCD Loss:
DSR Loss:
DTR Loss:
RXD Loss:
TXD Loss:
TxC (Ext. Clk) Loss:
Timing (Shelf) Loss:
DTE Test:
Masked
Masked
Masked
Masked
Report
Report
Masked
Masked
[0] Return to Main Menu
Select: [ ]
Figure 3-5
[S] Save & Update Unit
Alarm Configuration Screen (default settings are all Masked)
The procedure for changing Alarm Configuration option settings involves the following steps:
1.
You may want to begin with the Report All Alarms command or the Report None command, depending on how you intend to set the majority of the alarm options. Type R for
Report All Alarms or N for Report None, then press the Enter key.
Go to step 6 if you don’t need to change any of the individual alarm options. If you do need
to change individual options, follow steps 2 through 5.
2.
Type the selection number or letter of the option you intend to change. Highlighting appears on the current setting field for the corresponding option.
3.
Use the arrow keys to toggle the highlighted field between the Masked and Report settings.
4.
When the field displays the desired setting, press the Enter key. The highlight returns to the
Select field.
5.
Repeat steps 2 through 4 for each option you need to change.
6.
After you’ve made all required changes, type selection S, Save & Update Unit and
press the Enter key. In response the prompt ARE YOU SURE (Y/N)? appears.
7.
If you are certain that your changes are correct, type Y and press the Enter key to put the
changed configuration into effect in the DSE.
If you decide not to put your changes into effect, type N and press the Enter key. You can
then either make further changes or proceed to dismiss the screen.
8.
To dismiss the Alarm Configuration screen, type selection 0, Return to Main Menu,
and press the Enter key. If there are no unsaved changes the display returns to the SC 5553
Main Menu and the configuration procedure is complete.
GDC 076R108-000
3-12
Operation
9.
If there are unsaved changes when you attempt to dismiss the Alarm Configuration screen,
the prompt Pending Edits, Exit without saving (Y/N)? appears. You can
type Y and press the Enter key to dismiss the screen and discard the unsaved changes. If
you type N and press the Enter key, the Alarm Configuration screen remains on display so
that you can perform a Save or make further changes before you type 0 again to dismiss
the screen.
Monitor/Alarms
The terminal interface SC 5553 Monitor/Alarms function displays a screen of status information
concerning DTE interface signals and alarm conditions. Figure 3-6 illustrates the Monitor/
Alarms screen.
The DTE Status portion of the screen displays the current status of nine DTE interface signals.
The status of Transmit Data (TXD) and Receive Data (RXD) can be TRANS, MARK, or SPACE.
The status of the other seven signals can be OFF, ON, or TRANS. TRANS indicates that a signal
is transitioning, as opposed to being in a single prolonged state.
The Alarm Status portion of the screen displays ACTIVE, NO, or MASKED for each alarm
condition. ACTIVE indicates the condition currently exists; NO indicates the condition does not
currently exist; and MASKED indicates reporting of the condition has been masked by means of
the Alarm Configuration screen. Definitions of the alarm conditions appear below.
When you are done viewing the Monitor/Alarms screen, type 0 and press the Enter key to return
to the Main Menu.
NOTE
The screen updates every five seconds so that current information is always displayed.
The cursor highlight flickers from field to field on the screen during the brief time
required to complete the update. Do not attempt to Return to Main Menu by typing 0
while an update is taking place. Wait until the cursor highlight returns to the Select field.
SC 5553 Monitor/Alarms
DTE Status
TXD:
TXC:
RTS:
MARK
TRANS
OFF
RXD:
DTR:
CTS:
TRANS
OFF
ON
DCD:
DSR:
RXC:
ON
ON
TRANS
Alarm Status
Major:
EEPROM Chksum:
DCD Loss:
Timing (Shelf):
TxC (Ext. Clk):
Minor:
NO
RXD (No Transit):
MASKED TXD (No Transit):
MASKED
NO
[0] Return to Main Menu
Select: [ ]
GDC 076R108-000
MASKED
ACTIVE
Fr.
DSR
DTR
DTE
Informational:
Pan. Test: MASKED
Loss:
MASKED
Loss:
MASKED
Test:
MASKED
Operation
3-13
Figure 3-6
Monitor/Alarms Screen
The Alarms Status portion of the Monitor/Alarms screen displays alarms grouped into three
categories:
•
Major
•
Minor
•
Informational
Major Alarms
EEPROM Checksum – indicates that the non-volatile memory that stores the DSE
configuration has become corrupted
DCD Loss – indicates loss of incoming data
Timing (Shelf) – indicates loss of shelf timing from the backplane
TxC (Ext. Clk) – indicates loss of external clock signal from the DTE
Minor Alarms
RXD (No Transitions) – indicates Received Data signal is all marks or all spaces for one
minute or longer
TXD (No Transitions) – indicates Transmit Data signal is all marks or all spaces for one
minute or longer
Informational Alarms
Front Panel Test – indicates the DSE has been commanded into a test by means of its front
panel switches
DSR Loss – indicates the DSE is not outputting Data Set Ready to the DTE
DTR Loss – indicates the DSE is not receiving Data Terminal Ready from the DTE
DTE Test – indicates the DSE has been commanded into a test by means of a DTE interface
lead
Maintenance
The terminal interface Maintenance screen displays information about the unit and provides
specialized control functions involving the front panel switches and indicators, equipment resets,
and firmware downloading. Figure 3-7 illustrates the Maintenance screen.
GDC 076R108-000
3-14
Operation
SC 5553 Maintenance
General Datacomm.
SpectraComm 5553.
Fractional T1 Data Set Emulator
Firmware/Boot Revision:
Serial Number:
DTE Interface Type:
C0066000102030405
V.35
[1] Front Panel Switches: Enabled
[2] Front Panel LED Test: Off
Reset Options:
[3] Soft Reset.
* WARNING *
[4] Reset to Factory Defaults. * WARNING *
Disrupts communications.
Disrupts communications.
[5] Firmware Down Load.
[0] Return to Main Menu
Select: [ ]
Figure 3-7
Maintenance Screen
The information display identifies the unit, its firmware revision level, the type of DTE interface
selected, and its serial number. The DTE Interface Type can be "RS 232" or "V.35" depending
on the setting of hardware jumpers on the DSE pc card.
The Maintenance screen includes five command selections:
[1] Front Panel Switches – permits you to enable or disable the hardware switches on the
front panel of the SC 5553 DSE.
[2] Front Panel LED Test – when set to On causes all LEDs on the DSE front panel to light.
The LEDs remain lit until the command selection is set to Off. This is both a test of the
LEDs themselves, and a convenience when using the terminal interface and Telnet for
diagnostics from a remote location. This feature enables you to identify a unit for easy
location by on-site personnel.
[3] Soft Reset – causes the DSE to perform a reset and resume operation using its current
configuration when you type 2 and press the Enter key.
[4] Reset to Factory Defaults – causes all options in the DSE to return to their factory
default settings when you type 3 and press the Enter key.
[5] Firmware Down Load – invokes the download function, which is described on the
following pages.
NOTE
GDC 076R108-000
When you send the Reset to Factory Defaults command to the SC 5553 DSE,
it also causes the Backplane Control/Highway Configuration function of the
SCM card to default the DS0s assigned to the DSE. The status of DS0s
formerly assigned to the DSE changes to Available, and the DSE cannot
exchange data with its LTU until you configure timeslot/DS0s for it again.
Operation
3-15
You set Front Panel Switches or Front Panel LED Test in much the same way that you do
configuration selections on other screens:
1.
Type the selection number and press the Enter key. Highlighting appears on the setting
field.
2.
Use the arrow keys to toggle the highlighted field between its two values, Enabled /Disabled or On/Off.
3.
When the field displays the desired setting, press the Enter key. The highlight returns to the
Select field. The new setting goes into effect immediately.
When you are done with the Maintenance screen, type 0 and press the Enter key to return to the
Main Menu.
Firmware Download
The terminal interface Firmware Download function enables you to load new operating firmware
into the DSE. Loading of firmware is typically required when GDC makes changes to improve
performance or to include new features.
The SC 5553 DSE can store two versions of operating firmware, designated as the Active Revision and the Standby Revision. You can have newly downloaded firmware immediately serve as
the Active Revision, or you can store it as the Standby Revision. You can switch between Active
and Standby Revisions as needed.
SC 5553 Firmware Download
Active Firmware Revision:
Standby Firmware Revision:
Standby Firmware Status:
Download Mode:
Download Status:
[1]
[2]
[3]
[4]
01.00.00
00.00.00
INVALID - BLANK
DISABLE ALL DOWNLOADS
Idle
SWITCH TO STANDBY FIRMWARE NOW
DISABLE ALL DOWNLOADS
ENABLE DOWNLOADS AND STORE ZIPPED
ENABLE DOWNLOADS, UNZIP AND EXECUTE
[0] Return to SC 5553 Maintenance
Select: [ ]
Figure 3-8
Firmware Download Screen
GDC 076R108-000
3-16
Operation
The Firmware Download screen contains five lines of read-only information display, and five
command selections. The following information is displayed:
Active Firmware Revision – displays the version and revision number of firmware that is
currently operating in the DSE
Standby Firmware Revision – displays the version and revision number of inactive
firmware that the DSE has stored in zipped (compressed) format
Standby Firmware Status – displays one of five status indications:
Invalid- Blank – new DSE with no standby firmware loaded
Valid- OK – standby firmware loaded and ready for use
Invalid- Checksum Failed – standby firmware corrupted during download
Invalid- Download Aborted – download aborted in progress by SCM
Invalid- Unzip Failed – problem occurred during unzip of standby firmware
Download Mode – displays the DSE’s selected response to a download of new firmware;
see the command selections below for the potential modes
Download Status – displays one of five status indications:
Idle – no current activity
Active – transfer currently taking place
Calculating Checksum – approximately 40 seconds following completion of transfer
Checksum GOOD – indicates successful completion of transfer
Checksum BAD – indicates failure of transfer
The command selections are
[1] Switch to Standby Firmware Now – commands the DSE to unzip (decompress) the
stored, inactive firmware and place it into service as the current operating firmware; at the
same time the DSE zips and stores the firmware that it had been operating with.
[2] Disable All Downloads – commands the DSE not to accept download of firmware;
appears in the Download Mode display when selected
[3] Enable Downloads and Store Zipped – commands the DSE to accept download of
firmware, storing the newly downloaded code as the zipped and inactive Standby Firmware
until it is placed into service by the Switch to Standby Firmware Now command; appears
in the Download Mode display when selected
[4] Enable Downloads, Unzip and Execute – commands the DSE to accept download of
firmware, immediately unzipping the newly downloaded code and placing it into operation,
while storing the former operating code as zipped and inactive Standby Firmware; appears
in the Download Mode display when selected
[0] Return to SC 5553 Maintenance – dismisses the Firmware Download screen
Command selections 2, 3, and 4 are configuration options. The one you select is displayed onscreen as the Download Mode for the DSE, and the selection remains in effect until it is changed.
Download Mode determines how the DSE responds to having firmware downloaded. You
perform the actual firmware download procedure by means of Trivial File Transfer Protocol
(TFTP).
Unlike those three command selections, command selection 1 initiates an immediate response by
the DSE. A description of that response appears following the directions for downloading.
GDC 076R108-000
Operation
3-17
Firmware download procedure using TFTP:
1.
Open a second window in which to perform the TFTP functions. Keep the Firmware Download screen on display in order to monitor the Download Status.
2.
Initiate a TFTP session to the SCM.
3.
At the TFTP prompt type
bin
and press the Enter key so that the transfer takes place in binary mode.
4.
Type
put "firmware filename" "address & product code"
and press the Enter key to initiate the actual transfer. The firmware filename is provided
with the firmware that is to be downloaded. The address portion of the address & product
code is the slot/line/drop address when you are downloading to a single unit. There is also
a broadcast code that enables you to send new firmware to all the SC 5553 DSEs in a shelf
(or pair of shelves) at once. The diagram below provides further definitions of the filename
and address formats.
Firmware Filename Format:
VMMmmbbv.ppp
3-digit product code –
066 for SC 5553
2-digit code correction level
2-digit minor revision level
2-digit major revision level
Address and Product Code
Format, Single Unit:
SSLLDD00.66
5-character product code –
00.66 for SC 5553
2-digit Drop # (default: 00)
2-digit Line # (default: 01)
2-digit Shelf Slot # in hex - 01 – 20 (32 decimal)
Address and Product Code Format,
All SC 5553 Units in Shelf:
applbr00.66
5-character product code –
00.66 for SC 5553
Application Broadcast
5.
The Download Status line of the Firmware Download screen displays Active while the
download takes place, then displays Calculating Checksum for approximately 40 seconds. When the calculation is complete, the status line displays either Checksum GOOD or
Checksum BAD. When you perform a download to a single unit, the RSP indicator LED
of that unit flashes during the download. When you perform a download to all units in a
shelf, their RSP indicator LEDs remain Off.
6.
If the selected Download Mode is Enable Downloads and Store Zipped, the procedure is
complete once the checksum is calculated. The DSE stores the newly loaded firmware as
its standby firmware until you put it into service by means of the Switch to Standby Firmware Now command. If the selected Download Mode is Enable Downloads, Unzip and Execute, the DSE continues with the process of placing the new firmware into service as
described below.
GDC 076R108-000
3-18
Operation
You can monitor the process as the DSE unzips and begins to execute firmware by observing the
indicator LEDs on its front panel. The sequence is the same whether the activity occurs in
response to a Switch to Standby Firmware Now command or as the last part of a download with
Enable Downloads, Unzip and Execute selected as the Download Mode:
1.
All LEDs light briefly.
2.
Then, while the unzip process takes place, the four test function LEDs (ST, LT, RL, DL)
flash in sequence.
3.
When the unzip process is complete, all LEDs light as the DSE performs a reset.
4.
The Test Mode (TM) indicator lights while the DSE performs its power-on self test.
5.
The indicators return to their normal operating states as the DSE resumes operation using
the newly activated firmware.
GDC 076R108-000
4 Tests
Overview
You should test the SC 5553 DSE when it is first installed to verify correct installation. After the
equipment is in service you may need to perform tests to diagnose any problems that occur in the
operation of the DSE or the data communications system.
There are five ways to initiate performance testing of the SC 5553 DSE:
•
commands from an SNMP controller
•
terminal interface commands
•
DSE front panel ST, LT, RL, and DL switches
•
signals from the DTE on the EIA Remote Loop and EIA Local Loop leads
•
PN127 Remote Loop command from the remote DSU
Test commands from an SNMP controller take priority over tests commanded in any other way.
You can individually enable/disable front panel, EIA, and PN127 test control in the DSE configuration.
This chapter describes tests you can initiate on the SC 5553 DSE from the terminal interface, the
front panel, or the DTE. Consult the appropriate SNMP controller documentation for information on the other forms of testing.
Figure 4-1, Fault Isolation Procedure, illustrates an approach you can follow for using the front
panel tests to identify the source of a problem.
NOTE
In order to perform any diagnostic tests the SC 5553 DSE must be
configured for its selected bandwidth (data rate) and provided with
shelf timing. When the data rate is configured, it appears on the front
panel 4-character, 7-segment display. If "0000" appears on the display,
there is no bandwidth selected.
GDC 076R108-000
4-2
Tests
Start
Problem
Exists?
No
Exit
Yes
Perform Local Test with
Self Test on local DSE
Perform Local Test
on local DSE, using
externally generated
test pattern.
Fault detected in
communication link
Figure 4-1
Pass
Pass
or
Fail
Fail
Local DSE is
defective
Pass
Pass
or
Fail
Fail
Fault is in DTE, DTE
interface of the DSE,
or DTE-to-DSE cable.
Fault Isolation Procedure
Terminal Interface Diagnostics Screen
The terminal interface SC 5553 Diagnostics screen combines configuration and command
functions. Selections 6 through B are the command fields by which you can begin and end test
procedures. The Test Results field below selection B displays the results of tests that employ Self
Test. The result is either Passed, if no errors are detected, or the number of RX Errors.
Figure 4-2 illustrates the Diagnostics screen. Instructions for using the screen to perform tests
appear following the illustration.
GDC 076R108-000
Tests
4-3
SC 5553 Diagnostics
Diagnostic Options
DTE:
[1]
Local Loopback Control:
[2]
Remote Loopback Control:
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[A]
[B]
Disable
Disable
Network:
Remote Loop Receive (PN127):
Remote Loop Auto Timeout:
Self Test Pattern:
Enable
Disable
511
T E S T S:
Local Loopback:
Local Loopback & Self Test:
Remote Loopback (PN127):
Remote Loopback & Self Test:
Digital Loopback:
Self Test:
Test Results:
Idle
Idle
Idle
Idle
Idle
Idle
Passed
[0] Return to Main Menu
Select: [ ]
Figure 4-2
[S] Save [1] - [5] & Update Unit
Diagnostics Screen
The procedure for performing tests from the Diagnostic screen involves the following steps:
1. Type the selection letter of the test you intend to perform and press the Enter key. Highlighting appears on the status field for the corresponding test, which displays "Idle" at this point.
2. Use the arrow keys to toggle the highlighted field so that it displays "Active." The DSU begins the selected test.
NOTE
The terminal interface does not permit a test to run 10 minutes or
longer. A timeout disconnect occurs if 10 minutes pass without any
keyboard activity. If the DSE disconnects due to a timeout, it performs
an orderly shut-down of the test. It does not display results for a test
that employs Self Test.
3. To end the test, use the arrow keys again to toggle the highlighted field so that it again displays "Idle" then press the Enter key. The DSE ends the test and the highlighting returns to
the Select field. If the test employed Self Test, the screen displays the number of RX Errors
(if any) in the Test Results field.
4. To dismiss the screen, type selection 0, Return to Main Menu, and press the Enter key.
GDC 076R108-000
4-4
Tests
Local Test
The Local Test loopback condition isolates the DSE from the backplane data highway by connecting the transmit logic circuits to the receive logic circuits. The loopback provides a path
through the DSE for an externally generated test signal, as shown in Figure 4-3.
During Local Test:
•
The DTE interface remains active.
•
The DSE loops transmit data from the DTE back as receive data.
•
Either the DTE or a bit error rate tester (BERT) connected to the DTE interface can supply
and check a test signal.
•
The device supplying the test signal is responsible for error detection and reporting.
There are four ways to control the Local Test function:
•
briefly press the LT switch on the front panel to initiate the loopback; press the switch again
to end the loopback.
•
assert a signal from the DTE on the LT lead of the DTE interface to initiate the loopback;
turn the signal Off to end the loopback.
•
command the test by means of the terminal interface.
•
transmit commands from an SNMP controller to initiate and end the loopback
.
NOTE
GDC 076R108-000
Tests cannot be performed by means of front panel switches when the
front panel has been inhibited by an SNMP controller. Front panel
enabled is the default condition.
The DTE interface LT lead can only command Local Test if LT EIA has
been enabled by an SNMP controller. The default condition is LT EIA
disabled.
In order to perform any diagnostic tests the SC 5553 DSE must be
configured for its selected bandwidth (data rate) and provided with
shelf timing.
Tests
4-5
INS
ON
SD
RD
RS
CO
3. Enter test data at the DTE. Compare data
entered at the DTE with data looped back
and displayed by the DTE. (Test equipment
can be used in place of the DTE.
TMG RSP
SC 5553 DSE
HELLO
DTE
Interface
TM
ALM
TX
Logic
Backplane
Driver
RX
Logic
Backplane
Receiver
Interface
to
Backplane
Data
Highways
ST
LT
RL
2. TM indicator On while Local Test
loopback is active.
DL
1. To start test from front panel, press LT
momentary action switch.
LT indicator is lit during the test.
Press switch again to end the test.
5553
Figure 4-3
Local Test
GDC 076R108-000
4-6
Tests
Local Test with Self-Test
Local Test with Self-Test checks the internal circuits of the local DSE, isolated from both the
DTE and the backplane data channels. The test procedure involves two functions:
•
Local Test — the DSE loops transmit data back as receive data.
•
Self-Test — the DSE enables its internal Test Pattern Generator to provide the signal for
the Local Test loop and enables its Test Pattern Checker to verify the signal. The DSE can
employ either a 511-bit or a 2047-bit test pattern. The DSE is isolated from its DTE while
the Test Pattern Generator and Checker are enabled.
The LT, ST, and TM indicators are On during the test. The Test Mode (TM) indicator remains
On as long as the test pattern is received without errors and blinks when an error is detected.
There are three ways to control the Local Test with Self-Test function:
•
Briefly press the LT and ST switches on the front panel to initiate the test; press the
switches again to end the test.
•
command the test by means of the terminal interface.
•
.
Transmit commands from an SNMP controller to initiate and end the test.
NOTE
GDC 076R108-000
Tests cannot be performed by means of front panel switches when the
front panel has been inhibited by an SNMP controller. Front panel
enabled is the default condition.
In order to perform any diagnostic tests the SC 5553 DSE must be
configured for its selected bandwidth (data rate) and provided with
shelf timing.
Tests
4-7
SC 5553 DSE
INS
ON
SD
RD
RS
CO
TPG
DTE
Interface
TMG RSP
TX
Logic
Backplane
Driver
RX
Logic
Backplane
Receiver
Interface
to
Backplane
Data
Highways
TPC
TM
TPG – Test Pattern Generator
TPC – Test Pattern Checker
ALM
ST
LT
2. TM indicator On during test. Blinks
to indicate a detected error. Lit steadily
while pattern is received correctly.
RL
DL
1. To start test from front panel, press LT
and ST momentary action switches.
LT and ST indicators are lit during the test.
Press switches again to end the test.
5553
Figure 4-4
Local Test with Self-Test
GDC 076R108-000
4-8
Tests
End-to-End Self Test
The Self Test function enables you to perform an end-to-end self test, which is the most compete
test of the DSE, the remote DSU, and the connection between them. In this test, the DSE and the
remote DSU each generate and transmit a pattern that is then checked for errors by the unit that
receives it.
When controlled from the front panel, this test requires the cooperation of an operator at the remote DSU site to activate the self test function in the remote DSU. Contact the remote operator
to arrange for the test, then briefly press the ST switch on the front panel to initiate the test.
.
NOTE
Tests cannot be performed by means of front panel switches when the
front panel has been inhibited by an SNMP controller. Front panel
enabled is the default condition.
In order to perform any diagnostic tests the SC 5553 DSE must be
configured for its selected bandwidth (data rate) and provided with
shelf timing.
The DSE enables its internal Test Pattern Generator to provide the signal that is transmitted to the
remote DSU via the shelf backplane and the LTU. The signal sent from the DSE is checked for
errors by the receiving DSU, and the remote operator is responsible for observing error
indications at that site.
At the same time the remote DSU transmits its test pattern to the DSE for checking. The ST and
TM indicators are On during the test. The TM indicator remains On as long as the test pattern is
received without errors and blinks when an error is detected.
The DSE can employ either a 511-bit or a 2047-bit test pattern, selectable by means of an SNMP
controller. The DSE returns to its default of 511-bit any time its power is cycled or a reset is
performed. The same test pattern must be selected for both the DSE and the remote DSU in order
for the end-to-end test to function correctly.
The DSE is isolated from its DTE while the Test Pattern Generator and Checker are enabled.
GDC 076R108-000
Tests
4-9
Remote DSU
DTE Interface
INS
ON
SD
RD
RS
CO
TPC
TPG
RX
Logic
TMG RSP
2.
TM indicator On during test. Blinks to indicate a detected error. Lit steadily while
pattern is received correctly
Analog
Receiver
TM
TX
Logic
TX
Driver
1. To start test from front panel, press ST
switch. ST indicator is lit during the test.
Press switch again to end the test
ALM
ST
LT
SC 5000 System
RL
LTU
DL
Network
Interface
5553
Backplane
Receiver
Backplane
Driver
Backplane
Driver
Backplane
Receiver
TX
Logic
RX
Logic
TPC
TPG
DTE
Interface
TPG – Test Pattern Generator
TPC – Test Pattern Checker
SC 5553 DSE
Figure 4-5
End-to-End Self Test
GDC 076R108-000
4-10
Tests
Remote Loop
In the Remote Loop test function the local DSE transmits an in-band PN127 command to its remote DSU, directing the remote to loop received signals back onto the network. In order for this
test to function, the remote DSU must support use of the PN127 command.
.
NOTE
When configured to do so, the DSE can accept a PN 127 command from
the remote DSU and respond to it by looping receive data back onto the
network.
The Remote Loop Timeout option determines whether or not the DSE automatically ends the remote Loop test it initiates. When the option is enabled the DSE ends the test after ten minutes.
When the option is disabled the DSE runs the test until it is terminated manually.
The remote loopback provides a path through the DSE, the network, and the remote DSU for an
externally generated test signal, as shown in Figure 4-6. Remote Loop checks the local DSE, a
portion of the remote unit, and the T1 line.
During Remote Loop:
•
The DSE transmits the in-band loop-up command to its remote DSU.
•
In response to the command, the remote unit performs a digital loopback and loops the
receive signal back to its transmit path.
•
The DTE and backplane interfaces of the local DSE remain active.
•
A test signal can be supplied and checked either by the DTE or by a bit error rate tester
(BERT) connected to the DTE interface.
•
The device supplying the test signal is responsible for error detection and reporting.
•
The remote loopback remains in effect until the DSE transmits a loop down code for five
seconds, commanding the remote unit to release the loopback. The DSE does this
automatically after ten minutes when the Remote Loop Timeout option is enabled.
There are four ways to control the Remote Loop function:
•
briefly press the RL switch on the front panel to initiate the remote loopback; press the
switch again to end the remote loopback.
•
assert a signal from the DTE on the RL lead of the DTE interface to initiate the remote
loopback; turn the signal Off to end the remote loopback.
•
command the test by means of the terminal interface.
•
.
transmit commands from an SNMP controller to initiate and end the remote loopback.
NOTE
GDC 076R108-000
Tests cannot be performed by means of front panel switches when the
front panel has been inhibited by an SNMP controller. Front panel
enabled is the default condition.
The DTE interface RL lead can only command Remote Loop if RL EIA
has been enabled by an SNMP controller. The default condition is RL
EIA disabled.
In order to perform any diagnostic tests the SC 5553 DSE must be
configured for its selected bandwidth (data rate) and provided with
shelf timing.
Tests
4-11
Remote DSU
INS
ON
SD
RD
RS
CO
DTE Interface
RX
Logic
TMG RSP
TX
Logic
2. TM indicator On while
Remote Loop is active.
Analog
Receiver
TM
ST
ALM
TX
Driver
1. To start test from front panel, press RL momentary action switch.
RL indicator is lit during the test.
Press switches again to end the test.
LT
SC 5000 System
RL
LTU
DL
Network
Interface
5553
3. Enter test data at the
DTE. Compare data
entered at the DTE
with data looped back
and displayed by the
DTE. (Test equipment can be used in
place of the DTE.)
Backplane
Receiver
Backplane
Driver
Backplane
Driver
Backplane
Receiver
TX
Logic
DTE or Test
Device
RX
Logic
DTE
Interface
SC 5553 DSE
Figure 4-6
Remote Loop
GDC 076R108-000
4-12
Tests
Remote Loop with Self-Test
Remote Loop with Self-Test, shown in Figure 4-7, isolates the local DSE from the DTE and
checks the DSE internal circuits, the network link, and the remote DSU. The test procedure involves two functions:
•
Remote Loop — the local DSE transmits an in-band PN127 command to its remote DSU,
directing the remote to loop received signals back onto the network. In order for this test to
function, the remote DSU must support use of the PN127 command.
•
Self-Test — the DSE enables its internal Test Pattern Generator to provide the signal for
the Remote Loop and enables its Test Pattern Checker to verify the signal. The DSE is
configurable to use a 511-bit or a 2047-bit test pattern. The DSE is isolated from its DTE
while the Test Pattern Generator and Checker are enabled.
The Remote Loop Timeout option determines whether or not the DSE ends this test automatically. When the option is enabled the test DSE ends the test after ten minutes. When the option is
disabled the DSE runs the test until it is terminated manually.
The RL, ST, and TM indicators are On during the test. The Test Mode (TM) indicator remains
On as long as the test pattern is received without errors and blinks when an error is detected.
There are three ways to control the Local Test with Self-Test function:
•
briefly press the RL and ST switches on the front panel to initiate the test; press the switches
again to end the test. Test ends automatically after ten minutes if Remote Loop Timeout is
enabled.
•
command the test by means of the terminal interface.
•
transmit commands from an SNMP controller to initiate and end the test. Test ends
automatically after ten minutes if Remote Loop Timeout is enabled.
NOTE
GDC 076R108-000
Tests cannot be performed by means of front panel switches when the
front panel has been inhibited by an SNMP controller. Front panel
enabled is the default condition.
In order to perform any diagnostic tests the SC 5553 DSE must be
configured for its selected bandwidth (data rate) and provided with
shelf timing.
Tests
4-13
Remote DSU
INS
ON
SD
RD
RS
CO
DTE Interface
RX
Logic
TMG RSP
2. TM indicator On during test. Blinks to indicate a detected error. Lit steadily while
pattern is received correctly
TM
1. To start test from front panel, press RL and
wait approximately 4 seconds for remote
end to receive command, then press ST
switch. RL and ST indicators are lit during
the test. Press switches again to end the test
ALM
ST
Analog
Receiver
TX
Logic
TX
Driver
LT
SC 5000 System
RL
LTU
DL
Network
Interface
5553
Backplane
Receiver
Backplane
Driver
Backplane
Driver
Backplane
Receiver
TX
Logic
RX
Logic
TPC
TPG
DTE
Interface
TPG – Test Pattern Generator
TPC – Test Pattern Checker
SC 5553 DSE
Figure 4-7
Remote Loop with Self-Test
GDC 076R108-000
4-14
Tests
Data Loop
The Data Loop loopback condition, shown in Figure 4-8, isolates the DSE from the DTE by connecting the receive logic circuits to the transmit logic circuits. The loopback provides a path
through the receive and transmit circuits of the DSE for a test signal from a remote site. Equipment at the remote site is responsible for generating and checking the test signal.
There are two ways to control the Data Loop function:
•
briefly press the DL switch on the front panel to initiate the test; press the switch again to
end the test.
•
command the test by means of the terminal interface.
•
transmit commands from an SNMP controller to initiate and end the test.
NOTE
GDC 076R108-000
Tests cannot be performed by means of front panel switches when the
front panel has been inhibited by an SNMP controller. Front panel
enabled is the default condition.
In order to perform any diagnostic tests the SC 5553 DSE must be
configured for its selected bandwidth (data rate) and provided with
shelf timing.
Tests
4-15
Remote DSU
INS
ON
SD
RD
RS
CO
DTE Interface
RX
Logic
TMG RSP
2. TM indicator On while
Digital Loop is active.
Analog
Receiver
TM
ST
ALM
TX
Logic
TX
Driver
1. To start test from front panel, press DL
momentary action switch.
DL indicator is lit during the test.
Press switch again to end the test.
LT
SC 5000 System
RL
LTU
DL
Network
Interface
5553
Backplane
Receiver
Backplane
Driver
Backplane
Driver
Backplane
Receiver
TX
Logic
RX
Logic
DTE
Interface
SC 5553 DSE
Figure 4-8
Data Loop
GDC 076R108-000
A Technical Characteristics
Item
Specification
Physical
PC card (rackmount installation)
Height (SC 5553 card only)
0.81 in. (21 mm)
Width
7 in. (178 mm)
Depth
9.5 in. (241 mm)
Weight (SC 5553 card only)
10 oz (0.28 kg)
Shipping weight (SC 5520 card only)
1 Ib 10 oz (0.74 kg)
Environmental
Temperature
Operating
32° to 122°F (0° to 50°C) (Derate
by 1°C/1000 ft above sea level)
Non-operating
–40° to 185°F (–40° to 85°C)
Humidity, operating
5% to 95% without condensation
Altitude
Operating
0 ft to 10,000 ft
(0 m to 3,047 m)
Non-operating
0 ft to 40,000 ft
(0 m to 12,191 m)
Electrical
Power dissipation (SC 5553 card only)
4 W maximum
Fusing
Two 2.5 A, 125 V (GDC Part No.
215-201-009)
One 5 A, 125 V (GDC Part No.
215-201-021)
Operation
N x 56 kbps or N x 64 kbps
Point-to-point
Signal format
Serial, synchronous
Data rate, synchronous
56 kbps to 2048 kbps
DTE interface
ITU-T V.35 or EIA-530 – jumper
selectable on card
Transmit Timing
Shelf (Receive) or external (DTE)
(can accept external clock up to
±0.02%)
GDC 076R108-000
B DTE Interface Signals
Table B-1
ITU-T V.35 DTE Interface Signals
V.35
Circuit Designation
Pin
ITU-T
EIA
Description
A
101
AA
This circuit is connected to the equipment frame. Normally, it is separated from
signal ground (pin B) by 100 ohms, but it may be connected to signal ground by
means of an option strap (X1).
B
102
AB
Establishes a common ground reference for all interface circuits except protective ground, pin A.
C
105
CA
Indicates to Data Set that DTE is prepared to transmit.
D
106
CB
Indicates to DTE that Data Set is prepared to transmit.
E
107
CC
Indicates to DTE that Data Set is operational.
F
109
CF
Indicates to DTE that Data Set is receiving data (not idle or OOS codes).
K
142
TM
Indicates to DTE that Data Set is in a test mode.
P
S
103
103
BA(A)
BA(B)
Transfers data signals from DTE for transmission over communication line.
R
T
104
104
BB(A)
BB(B)
Transfers data signals received over communication line by Data Set to DTE.
U
W
113
113
DA(A)
DA(B)
Transfers transmitter signal timing information from DTE to Data Set.
V
X
115
115
DD(A)
DD(B)
Transfers receiver signal timing information from Data Set to DTE.
Y
AA/a
114
DB(A)
DB(B)
Transfers transmitter signal timing information from Data Set to DTE.
H
108/2
CO
Indicates to Data Set that DTE is prepared for data communication.
L
141
LL
Controls Local Loopback test
N
140
RL
Controls Remote Loop test
GDC 076R108-000
B-2
DTE Interface Signals
Table B-2
EIA-530 DTE Interface Signals
P1 Pin
EIA Circuit
Designation
1
—
2
14
BA(A)
BA(B)
Transfers data signals from DTE for transmission over communication line.
3
16
BB(A)
BB(B)
Transfers data signals received over communications line by Data Set to DTE.
4
19
CA(A)
CA(B)
Indicates to Data Set that DTE is prepared to transmit.
5
13
CB(A)
CB(B)
Indicates to DTE that Data Set is prepared to transmit.
6
22
CC(A)
CC(B)
Indicates to DTE that Data Set is operational.
20
23
CD(A)
CD(B)
Indicates to Data Set that DTE is prepared for data communications.
7
AB
8
10
CF(A)
CF(B)
Indicates to DTE that Data Set is receiving data (not idle or OOS codes).
15
12
DB(A)
DB(B)
Transfers transmitter signal timing information from Data Set to DTE.
17
9
DD(A)
DD(B)
Transfers receiver signal timing information from Data Set to DTE.
24
11
DA(A)
DA(B)
Transfers transmitter signal timing information from DTE to Data Set.
25
TM
GDC 076R108-000
Description
Allows shield connections via pin number 1.
Establishes common ground reference for all interface circuits except protective
ground.
Indicates whether the local DCE is in a test condition.
C SC5553 MIB Support
Overview
This appendix details the Management Information Base (MIB) table objects by which an SNMP
controller can command and monitor the SC 5553 DSE.
Table C-1:
MIB Object
MIBversion
GDC Common MIB Tables
Syntax
Access
DisplayString
(SIZE (5))
Table C-2:
Enumeration
read-only
Description
Identifies the version of the MIB. The
format of the version is x.yzT, where 'x'
identifies the major revision number, 'y'
identifies the minor revision number, 'z'
identifies the typographical revision, and
T identifies the test revision.
Upon formal release, no designation for
the test revision will be present.
Acceptable values for the individual revision components are as follows:
x: 1 - 9,
y: 0 - 9,
z: 0 - 9,
T: A - Z
Version Table
MIB Object
Syntax
Access
Enumeration
Description
VersionIndex
SCinstance
read-only
Identifies Version parameters associated
with the managed object
FirmwareRev
DisplayString
(SIZE(2))
read-only
The version number of the firmware, to
allow products to know which revision is
installed.
The released version number is sequenced from --, A-, ... AA, ... ZZ. Test
versions are numerical from 01 to 99
GDC 076R108-000
C-2
SC 5553 MIB Support
Table C-3:
DS0 Allocation Table (* = default setting)
MIB Object
Syntax
Ds0Allocation
Index
SCinstance
read-only
The index value: slot, line, drop, and interface
DS0BaseRate
INTEGER
read-write
Indicates the DS0 base rate: either 56K or
64K bits per second. This is used in conjunction with the number of DS0s set to
'enabled' to determine the total bandwidth.
Highway
DccDs0
DS0Allocation
INTEGER
INTEGER
OCTET
STRING
(SIZE(5))
Access
Enumeration
nx64k(1) =
N X 64K rate
The base rate of 64K defines the DS0 data
format as clear channel in which all 8 bits
of the DS0 are used.
nx56k(2) =
N X 56K rate*
A base rate of 56K defines the DS0 as
non-clear in which bits 1-7 are used for
channel data and the 8th bit is either unused and forced to marks or used to pass
signaling information.
read-only
read-write
Description
The highway used for DS0 traffic by this
device
highway1(1) *
-- All DS0 are routed to Highway 1
highway2(2)
-- All DS0 are routed to Highway 2
highway3(3)
-- All DS0 are routed to Highway 3
highway4(4)
-- All DS0 are routed to Highway 4
dccDs01(1)
through
dccDs032(32),
The values 1-32 indicate which DS0 is
used for diagnostics communications
noDccDs0(33)
*
The value noDccDs0(33) indicates that diagnostic communications do not utilize a
separate Ds0
read-only
A bitwise snapshot of DS0 allocation.
bit values are:
0 = disabled*,
1 = enabled
bit0 - ds0 7
bit1 - ds0 6
bit2 - ds0 5
bit3 - ds0 4
bit4 - ds0 3
bit5 - ds0 2
bit6 - ds0 1
bit7 - n/u
First octet
(Continued on next page)
GDC 076R108-000
SC 5553 MIB Support
Table C-3
MIB Object
DS0Allocation
(Continued)
Syntax
OCTET
STRING
(SIZE(5))
C-3
DS0 Allocation Table (* = default setting) (Continued)
Access
read-only
Enumeration
Description
bit0 - ds0 14
bit1 - ds0 13
bit2 - ds0 12
bit3 - ds0 11
bit4 - ds0 10
bit5 - ds0 9
bit6 - ds0 8
bit7 - n/u
Second octet
bit0 - ds0 21
bit1 - ds0 20
bit2 - ds0 19
bit3 - ds0 18
bit4 - ds0 17
bit5 - ds0 16
bit6 - ds0 15
bit7 - n/u
Third octet
bit0 - ds0 28
bit1 - ds0 27
bit2 - ds0 26
bit3 - ds0 25
bit4 - ds0 24
bit5 - ds0 23
bit6 - ds0 22
bit7 - n/u
fourth octet
bit0 - n/u
bit1 - n/u
bit2 - n/u
bit3 - ds0 32
bit4 - ds0 31
bit5 - ds0 30
bit6 - ds0 29
bit7 - n/u
fifth octet
GDC 076R108-000
C-4
SC 5553 MIB Support
Table C-4:
MIB Object
Syntax
Configuration Table (*= default setting)
Access
ConfigIndex
SCinstance
read-only
External
Timing
INTEGER
read-write
ChannelType
ClockInvert
DataInvert
ConstantDCD
ConstantDSR
INTEGER
INTEGER
INTEGER
INTEGER
INTEGER
Enumeration
Description
The index value: slot, line, drop, and interface
disabled(1)*
Disabled indicates timing is provided by
the 5553.
enabled(2)
Enabled indicates timing is provided by
the customer business equipment
read-only
The channel interface type
v35(1)*
-- V.35 interface
eia530(2)
-- 530 EIA interface
Clock invert option
read-write
(1)*
txClockNormRxClockNorm(1),
-- Tx and Rx clock normal
(2)
txClockNormRxClockInvert(2)
-- Tx clock normal, Rx clock inverted
(3)
txClockInvertRxClockNorm(3)
-- Tx clock inverted, Rx clock normal
(4)
txClockInvertRxClockInvert(4)
-- Tx and Rx clock inverted
read-write
Data invert option
(1)*
txDataNormRxDataNorm(1)
-- Tx and Rx data normal
(2)
txDataNormRxDataInvert(2)
-- Tx data normal, Rx data inverted
(3)
txDataInvertRxDataNorm(3)
-- Tx data inverted, Rx data normal
(4)
txDataInvertRxDataInvert(4)
-- Tx and Rx clock inverted
read-write
Controls the operation of Data Carrier Detect (DCD)signal.
disabled(1)
-- local DCD Off during ST and DL tests
enabled(2)*
-- local DCD forced On
read-write
Controls the operation of the Data Set
Ready (DSR) signal
disabled(1)
-- local DSR Off during ST and DL tests
enabled(2)*
-- local DSR forced On
(Continued on next page)
GDC 076R108-000
SC 5553 MIB Support
Table C-4
MIB Object
RTSCTS
control
Syntax
INTEGER
C-5
Configuration Table (*= default setting) (Continued)
Access
Enumeration
read-write
Description
Controls the function of the channel's
Request To Send and and Clear To Send
signals used for flow control
ctsOn(1)*
-- CTS forced on
ctsDelay10ms(2)
-- CTS delay 10 ms
ctsDelay
Standard(3)
-- CTS standard delay (40 bit delay)
ExtLLCtrl
INTEGER
read-write
disabled(1)*
enabled(2)
Enables/disables the ability to initiate a local loop test via the assertion of the EIA
LL test lead at the DTE interface
ExtRLCtrl
INTEGER
read-write
disabled(1)*
enabled(2)
Enables/disables the ability to initiate a remote loop test via the assertion of the EIA
RL test lead at the DTE interface
InbandDcc
Mode
INTEGER
read-write
InbandLoop
INTEGER
The mode of propagation of inband
Diagnostics Communication Channel
to the dedicated remote NMS553 unit.
none(1)*,
Specifies no inband DCC
embedded(2)
An allowed value when the mib object
sc5553DS0BaseRate is set to Nx56K, and
specifies that DCC is propagated in the
8th bit of the assigned DS0's.
dccDs0(3)
Specifies that a DS0 is used for propagation of DCC. This value must be selected
when the sc5553DS0BaseRate is Nx64k
(clear channel). Permitted as an option
when the sc5553DS0BaseRate is Nx56k.
A minimum of two DS0s must be assigned to this device in this mode.
The last DS0 should be set as the
sc5553DccDs0 when using this mode.
The DS0 allocation may be read from the
mib object sc5553DS0Allocation
read-write
This object is also referred to as RDL response.
disable(1)
-- disable detection of inband loop code
pn127(2)*
-- PN127 random code
When enabled (pn127), the channel will
enter a remote data loopback when an inband RDL code is detected. The required
in-band code must conform to CCITT
V.54 PN-127 scrambled codes
(Continued on next page)
GDC 076R108-000
C-6
SC 5553 MIB Support
Table C-4
MIB Object
Inband
Loopdown
Configuration Table (*= default setting) (Continued)
Syntax
Access
INTEGER
WakeUp
Remote
read-write
DisplayString
(SIZE (16))
Table C-5:
MIB Object
Syntax
Enumeration
Description
This object is also referred to as RDL
Auto Timeout.
disable(1*),
When disabled, the loopback must be terminated by an in-band loopdown code
tenMinutes(2)
When enabled (tenMinutes), the loopback
will be automatically terminatedby the
unit after ten minutes.
read-only
This object is requested to initiate the add
remote process. The serial number of the
associated remote is returned.
DTE Signal Status Table
Access
Enumeration
Description
SignalStatus
Index
SCinstance
read-only
The index value: slot, line, drop, and interface
CTSstatus
INTEGER
read-only
The state of the sc5553's Clear To Send
(CTS) signal
RTSstatus
DTRstatus
INTEGER
INTEGER
off(1)
CTS is off
on(2)
CTS is on
transitions(3)
CTS is transitioning -- indicates that the
signal is alternating between the states
off(1) and on(2).
read-only
The state of the sc5553's Request To Send
(RTS) signal
off(1)
RTS is off
on(2)
RTS is on
transitions(3)
RTS is transitioning -- indicates that the
signal is alternating between the states
off(1) and on(2).
read-only
The state of the sc5553's DataTerminal
Ready (DTR) signal
off(1)
DTR is off
on(2)
DTR is on
(Continued on next page)
GDC 076R108-000
SC 5553 MIB Support
Table C-5
MIB Object
DCDstatus
RXCstatus
TXCstatus
RXDstatus
TXDstatus
ALTestLead
Status
Syntax
INTEGER
INTEGER
INTEGER
INTEGER
INTEGER
INTEGER
C-7
DTE Signal Status Table (Continued)
Access
Enumeration
read-only
Description
The state of the sc5553's Data Carrier Detect (DCD) signal
off(1)
DCD is off
on(2)
DCD is on
transitions(3)
DCD is transitioning -- indicates that the
signal is alternating between the states
off(1) and on(2).
read-only
The state of the sc5553's Receive Clock
(RXC) signal
off(1)
RXC is off
transitions(2)
RXC is transitioning -- indicates that the
signal is alternating between the states
off(1) and on(2).
read-only
The state of the sc5553's Transmit Clock
(TXC) signal
off(1)
TXC is off
transitions(2)
TXC is transitioning -- indicates that the
signal is alternating between the states
off(1) and on(2).
read-only
The state of the sc5553's Receive Data
(RXD) signal
off(1)
RXD is off
on(2)
RXD is on
transitions(3)
RXD is transitioning -- indicates that the
signal is alternating between the states
off(1) and on(2).
read-only
The state of the sc5553's Transmit Data
(TXD) signal
off(1)
TXD is off
on(2)
TXD is on
transitions(3)
TXD is transitioning -- indicates that the
signal is alternating between the states
off(1) and on(2).
read-only
The state of the AL Test Lead
off(1)
AL Test Lead is off
on(2)
AL Test Lead is on
(Continued on next page)
GDC 076R108-000
C-8
SC 5553 MIB Support
Table C-5
MIB Object
RLTestLead
Status
Syntax
INTEGER
Table C-6:
MIB Object
Syntax
DTE Signal Status Table (Continued)
Access
Enumeration
read-only
Description
The state of the RL Test Lead
off(1)
RL Test Lead is off
on(2)
RL Test Lead is on
Diagnostics Table (*=default setting)
Access
Enumeration
Description
DiagIndex
SCinstance
read-only
The index value: slot, line, drop, and interface
DiagPattern
INTEGER
read-write
Selects the test pattern for Remote and Local loopback tests
DiagTest
Results
INTEGER
read-only
send511
Pattern(1)*
-- sending 511 test pattern only
send2047
Pattern(2)
-- sending 2047 test pattern only
The results of the last diagnostic test. This
can be the current test running or the last
completed test.
The units of the value of this object depend on the type of diagnostic test run.
For all cases except a network delay measurement, the units of the value of this object is the number of bit errors that
occurred. Bit errors can be read at any
time during the duration of the test.
The valid range for bit errors is 0 to 4,095.
65,535 will be returned if for any reason
the test is terminated early.
32,770 will be returned if the number of
bit errors exceeds 4,095.
For a network delay measurement,the
units of the value of this test are milliseconds.
32,770 will be returned if the delay is
greater than 4,095 milliseconds.
(Continued on next page)
GDC 076R108-000
SC 5553 MIB Support
Table C-6
MIB Object
Syntax
C-9
Diagnostics Table (*=default setting) (Continued)
Access
Enumeration
Description
DiagTest
Duration
INTEGER
read-write
testTime30Secs(15)*
testTime1Min(1)
testTime2Mins(2)
testTime3Mins(3)
testTime4Mins(4),
testTime5Mins(5),
testTime6Mins(6),
testTime7Mins(7),
testTime8Mins(8),
testTime9Mins(9),
testTime10Mins(10),
testTime15Mins(11),
testTime20Mins(12),
testTime25Mins(13),
testTime30Mins(14)
This specifies the test duration (in seconds) for the Remote and Local loopback
tests with Self Test
TestSelection
INTEGER
read-write
stopTest ornoTest(1)
To halt the execution of any and all diagnostic tests that may be running,
SET this object to stopTestorNoTest(1)
localloop(2)
LocalLoopback test is running
To initiate a LocalLoopBack with no SelfTest, SET this object to localloop(2). Data
from the DTE will be looped back to itself
localloopself
test(3)
LocalLoopback with Self Test is running
To initiate a LocalLoopBack SelfTest,
SET this object to localloopselftest(3).
The pattern specified in
sc5553DiagPattern will be sent and
checked for bit errors.
The test will run for the time specified in
sc5553DiagTestDuration, unless terminated by sending stopTestorNoTest(1).
Test results can be checked by reading the
sc5553DiagTestResults object
digitalLoop(4)
DigitalLoopback test is running
To initiate a DigitalLoopback test SET
this object to digitalLoop(4).
This will allow the data from the DTE attached to the far end unit (nms553) to be
looped back to itself.
This loopback can be terminated by sending stopTestorNoTest(1).
(Continued on next page)
GDC 076R108-000
C-10
SC 5553 MIB Support
Table C-6
MIB Object
Syntax
TestSelection
(continued)
INTEGER
Diagnostics Table (*=default setting) (Continued)
Access
read-write
Enumeration
Description
remoteloop(5)
RemoteLoopback test is running
To initiate a RemoteLoopback test with no
SelfTest, SET this object to remoteloop(5). The sc5553 DSE transmits an inband command to its remote DSU, directing the remote to loop received signals
back to the network.
The DSE is configurable to send (and accept) a PN127 remote loop command. The
remote DSU must be configured to accept
the same command the DSE transmits.
This loopback can be terminated by sending stopTestorNoTest(1).
remoteloopselftest(6)
RemoteLoopback with Self Test is running
To initiate a RemoteLoopback with SelfTest SET this object to remoteloopselftest(6).
The remote unit will go into remoteloopback and the master (sc5553) unit will go
into SelfTest.
The sc5553 transmits an in-band command to its remote DSU, directing the remote to loop received signals back onto
the network.
The DSE is configurable to send (and accept)a PN127 remote loop command.
The remote DSU must be configured to
accept the same command the DSE transmits. The sc5553 enables its internal Test
Pattern Generator to provide the signal for
Network delay test is running
To initiate a Network Delay Test SET this
object to networkdelay(7).
The results are valid only after the test is
completed which takes about10 seconds.
Network Delay Time can be checked by
reading the sc5553DiagTestResults object
after completion of the test.
For a GET, the value stopTestorNoTest(1)
indicates there are no active diagnostic
tests currently running. Any other value
indicates which test is currently active."
networkdelay(7)
GDC 076R108-000
SC 5553 MIB Support
Table C-7:
MIB Object
Syntax
C-11
Maintenance Table (*=default setting)
Access
Enumeration
Description
MaintIndex
SCinstance
read-only
LedStatus
(Octet 1)
OCTET
STRING
read-only
Returns a bitwise snapshot of front panel
LED state and front panel switches
Octet 1 bit 7 - not used
Octet 1 bit 6 - ON
Octet 1 bit 5 - INSV
Octet 1 bit 4 - RSP
Octet 1 bit 3 - TMG
Octet 1 bit 2 - future use
Octet 1 bit 1 - future use
Octet 1 bit 0 - future use
LedStatus
(Octet 2)
OCTET
STRING
read-only
Octet 2 bit 7 - not used
Octet 2 bit 6 - SD transitions
Octet 2 bit 5 - SD on/off
Octet 2 bit 4 - RD transitions
Octet 2 bit 3 - RD on/off
Octet 2 bit 2 - RS transitions
Octet 2 bit 1 - RS on/off
Octet 2 bit 0 - future use
LedStatus
(Octet 3)
OCTET
STRING
read-only
Octet 3 bit 7 - not used
Octet 3 bit 6 - CO transitions
Octet 3 bit 5 - CO on/off
Octet 3 bit 4 - ALM transitions
Octet 3 bit 3 - ALM on/off
Octet 3 bit 2 - TM transitions
Octet 3 bit 1 - TM on/off
Octet 3 bit 0 - future use
LedStatus
(Octet 4)
OCTET
STRING
read-only
Octet 4 bit 7 - not used
Octet 4 bit 6 - ST (switch)
Octet 4 bit 5 - LT (switch)
Octet 4 bit 4 - RL (switch)
Octet 4 bit 3 - DL (switch)
Octet 4 bit 2 - future use
Octet 4 bit 1 - future use
Octet 4 bit 0 - future use
(Continued on next page)
GDC 076R108-000
C-12
SC 5553 MIB Support
Table C-7
MIB Object
SoftReset
Maintenance Table (*=default setting) (Continued)
Syntax
Access
INTEGER
Enumeration
read-write
Description
Supports the action of soft resetting the
unit. When this object is set to reset(1),
the unit performs a soft reset.
The value norm will be returned when the
reset is complete. The value of norm can
not be set by management
reset(1)
-- write-only
norm(2)
-- read-only
FrontPanel
INTEGER
read-write
inhibit(1),
enable(2)*
This variable is used to indicate whether
the front panel switches are operational or
not
DefaultInit
INTEGER
read-write
factoryDefault(1)
normal(2)
(1)--write only
(2)--read-write
This is used to allow the NonVolatile Configuration to be set to a factory default
state. When this value is set to factoryDefault, the unit will reset to the default configuration. The value of normal will be
returned when the initialization is complete. The value normal can not be set by
management.
Table C-8:
Alarm Object Identifier Definitions Table
MIB Object
AccessEnumerationDescription
sc5553AlarmData
OBJECT IDENTIFIER ::= { sc5553Alarms 1 }
sc5553NoResponseAlm
OBJECT IDENTIFIER ::= { sc5553AlarmData 1 }
sc5553DiagRxErrAlm
OBJECT IDENTIFIER ::= { sc5553AlarmData 2 }
sc5553PowerUpAlm
OBJECT IDENTIFIER ::= { sc5553AlarmData 3 }
sc5553DTRLossAlarm
OBJECT IDENTIFIER ::= { sc5553AlarmData 4}
sc5553DSRLossAlarm
OBJECT IDENTIFIER ::= { sc5553AlarmData 5 }
sc5553DCDLossAlarm
OBJECT IDENTIFIER ::= { sc5553AlarmData 6 }
sc5553TxCLossAlarm (Ext Clk Loss) OBJECT IDENTIFIER ::= { sc5553AlarmData 7 }
sc5553TimingLoss (Shelf Timing)
OBJECT IDENTIFIER ::= { sc5553AlarmData 8 }
sc5553EEPROMCheckAlarm
OBJECT IDENTIFIER ::= { sc5553AlarmData 9 }
sc5553EIATestAlarm
OBJECT IDENTIFIER ::= { sc5553AlarmData 10 }
sc5553FrontPanelTestAlarm
OBJECT IDENTIFIER ::= { sc5553AlarmData 11 }
sc5553TxDNoTransAlarm
OBJECT IDENTIFIER ::= { sc5553AlarmData 12 }
sc5553RxDNoTransAlarm
OBJECT IDENTIFIER ::= { sc5553AlarmData 13 }
GDC 076R108-000
Index
Alarm Management Related Trap Table
Alarm Masking Table
Alarm Status Table
Application
Business Equipment Connections
Community Name Table
Controls and Indicators
CSU Loopback Test
Data Loop
Data Rate Adapter Card
Applications
DDS MIB
Async DTE Port Configuration Table
DTE Port Configuration Table
DTE Status Table
Line Configuration Table
Description
Download
DSE Addressing
DSU Loopback Test
DTE Connections
DTE Interface Signals
EIA 530 Interface Adapter Card
Installation
EIA-530 DTE Interface Signals
EIA/TIA-232-E DTE Interface Signals
Electrical Power Connection
Equipment List
Fault Isolation Procedure
Features
Firmware Download
Front Panel
Controls
Indicators
GDC SC 5000 Timing Table
Installation Procedures
C-4
C-4
C-3
1-2
2-6
C-2
3-1
4-12
4-10
2-3, 2-5
1-3
C-9
C-7
C-10
C-5
1-1
3-15
2-7
4-14
2-6
B-1
2-6
2-5
B-3
B-1
2-6
1-3
4-1
1-1
3-15
3-3
3-2
C-22
2-3
ITU-T V.35 DTE Interface Signals
Local Test
Local Test with Self-Test
Management
Module Installation Procedures
NMS510 MIB
Unit Configuration Table
Alarm Table
Alarms Configuration Table
Diagnostic Configuration Table
Diagnostic Execution Table
NMS520 MIB
Alarm Table
Alarms Configuration Table
Diagnostic Configuration Table
Diagnostic Execution Table
Line Statistics Table
Unit Configuration Table
OCU Loopback Test
Preoperational Check
Remote Loop
Remote Loop with Self-Test
SC5520 MIB
Alarm Table
Diagnostic Configuration Table
Diagnostic Execution Table
Maintenance Table
Master Table
Unit Configuration Table
SpectraComm Shelf
Back Panel
Technical Characteristics
Timing Options
Trap Table
Unpacking and Handling
B-2
4-2
4-4
1-2
2-3
C-37
C-39
C-40
C-41
C-42
C-28
C-30
C-31
C-33
C-30
C-25
4-12
2-2
4-6
4-8
C-16
C-18
C-20
C-17
C-14
C-11
2-1, 3-1
2-2
A-1
2-7
C-1
2-2
GDC 076R108-000
General DataComm