installation and operation - gdcinstallation and operation spectracomm 5520 gdc 076r102-000 issue 4...

Data Set Emulator

Installation and Operation

SpectraComm 5520

GDC 076R102-000 Issue 4 - January 1998

General DataComm

WarningThis 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 pro-tection against such interference when operated in a commercial environment. Operation of this equipment in a res-idential 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 modifica-tions 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 PatentsGeneral 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 SE-CURE-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 prod-ucts 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 di-rectly 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 doc-ument 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.

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Table of Contents

Preface

1 Technical Overview

Description ..........................................................................................................................

SC 5520 Data Set Emulator Features.................................................................................

Management .......................................................................................................................

Application...........................................................................................................................

Data Rate Adapter Applications ....................................................................................

2 Installation

Overview .............................................................................................................................

SpectraComm Shelf............................................................................................................

Unpacking and Handling.....................................................................................................

Preoperational Check .........................................................................................................

Installation Procedures ........................................................................................................

Module Installation Procedures .....................................................................................

Data Rate Adapter Card................................................................................................

EIA-530 Card Installation..............................................................................................

Electrical Power Connection .........................................................................................

Business Equipment Connections (DTE) ......................................................................

DSE Addressing............................................................................................................

Timing Options..............................................................................................................

3 Operation

Overview .............................................................................................................................

Controls and Indicators .......................................................................................................

SpectraComm Shelf ......................................................................................................

Terminal Interface ...............................................................................................................

Initiating a Terminal Interface Session..........................................................................

Selecting a DSE (Shelf Inventory Screen).....................................................................

Main Menu.....................................................................................................................

Configuration.................................................................................................................

Diagnostics ...................................................................................................................

Alarm Configuration......................................................................................................

Monitor/Alarms .............................................................................................................

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Maintenance...................................................................................................................

Firmware Download ......................................................................................................3

4 Tests

Overview ..............................................................................................................................

Terminal Interface Diagnostics Screen ................................................................................

Local Test .............................................................................................................................

Local Test with Self-Test .....................................................................................................

Remote Loop ........................................................................................................................

Remote Loop with Self-Test ................................................................................................

Data Loop .............................................................................................................................

DSU Loopback Test (STC Controlled) ................................................................................4

CSU Loopback Test (STC Controlled) ................................................................................4

Self Test................................................................................................................................

A Technical Characteristics

B DTE Interface Signals

C SC 5520 MIB Support

Overview ..............................................................................................................................

GDC Common MIB Tables .................................................................................................C

GDC DDS MIB Tables ........................................................................................................C

SC 5520 MIB Tables............................................................................................................

SC 5000 MIB Table .............................................................................................................

NMS 520 MIB Tables ..........................................................................................................C

NMS 510 MIB Tables ..........................................................................................................C

Index

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Figures

1-1 Data Rate Adapter Application 1 (Master: Internal, Slave: Internal).......................1-

1-2 Data Rate Adapter Application 2 (Master: External, Slave: Internal)......................1

2-1 SpectraComm Shelf Back Panel...............................................................................

2-2 Data Rate Adapter Card............................................................................................

2-3 EIA 530 Interface Adapter Card...............................................................................2

3-1 Front Panel Indicators...............................................................................................

3-2 Front Panel Controls .................................................................................................

3-3 SCM Main Menu Screen ..........................................................................................3

3-4 Telnet Connection Login Screen ..............................................................................3

3-5 Shelf Inventory Screen ............................................................................................

3-6 Main Menu Screen....................................................................................................

3-7 Configuration Screen, with Default Settings............................................................3

3-8 Diagnostics Screen ...................................................................................................

3-9 Alarm Configuration Screen, with Default Settings.................................................3

3-10 Monitor/Alarms Screen ............................................................................................3

3-11 Maintenance Screen..................................................................................................

3-12 Firmware Download Screen .....................................................................................

4-1 Fault Isolation Procedure..........................................................................................

4-2 Diagnostic Screen .....................................................................................................

4-3 Local Test .................................................................................................................

4-4 Local Test with Self-Test .........................................................................................4

4-5 Remote Loop ............................................................................................................

4-6 Remote Loop with Self-Test.....................................................................................4

4-7 Data Loop .................................................................................................................

4-8 DSU Loopback Test .................................................................................................4

4-9 CSU Loopback Test..................................................................................................

4-10 Self Test....................................................................................................................

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GDC 076R102-000, Issue 4

Tables

1-1 Equipment List .........................................................................................................1-4

3-1 SC 5520 Configuration Option Settings...................................................................3-7

3-2 SC 5520 Diagnostic Configuration Option Settings.................................................3-11

3-3 SC 5520 Alarm Configuration Option Settings........................................................3-13

B-1 EIA/TIA-232-E DTE Interface Signals ....................................................................B-1

B-2 ITU-T V.35 DTE Interface Signals ..........................................................................B-2

B-3 EIA-530 DTE Interface Signals ...............................................................................B-3

C-1 Trap Table (GDC Common MIB) ............................................................................C-1

C-2 Community Name Table (GDC Common MIB)......................................................C-2

C-3 Alarm Status Table (GDC Common MIB)...............................................................C-3

C-4 Alarm Masking Table (GDC Common MIB) ..........................................................C-4

C-5 Alarm Management Related Trap Table (GDC Common MIB)..............................C-4

C-6 DDS Line Configuration Table (GDC DDS MIB)...................................................C-5

C-7 DDS DTE Port Configuration Table (GDC DDS MIB)...........................................C-7

C-8 DDS Async DTE Port Configuration Table (GDC DDS MIB) ...............................C-9

C-9 DDS DTE Status Table (GDC DDS MIB)...............................................................C-10

C-10 SC5520 Unit Configuration Table (GDC SC5520 MIB) .........................................C-11

C-11 SC5520 Master Table (GDC SC5520 MIB).............................................................C-14

C-12 SC5520 Alarm Table (GDC SC5520 MIB) .............................................................C-16

C-13 SC5520 Maintenance Table (GDC SC5520 MIB) ...................................................C-17

C-14 SC5520 Diagnostic Configuration Table (GDC SC5520 MIB)...............................C-18

C-15 SC5520 Diagnostic Execution Table (GDC SC5520 MIB) .....................................C-20

C-16 GDC SC 5000 Timing Table (GDC SC5000 MIB) .................................................C-22

C-17 NMS520 Unit Configuration Table (GDC NMS520 MIB)......................................C-25

C-18 NMS520 Alarm Table (GDC NMS520 MIB)..........................................................C-28

C-19 NMS520 Alarms Configuration Table (GDC NMS520 MIB).................................C-30

C-20 NMS520 Line Statistics Table (GDC NMS520 MIB) .............................................C-30

C-21 NMS520 Diagnostic Configuration Table (GDC NMS520 MIB) ...........................C-31

C-22 NMS520 Diagnostic Execution Table (GDC NMS520 MIB)..................................C-33

C-23 NMS510 Unit Configuration Table (GDC NMS510 MIB)......................................C-37

C-24 NMS510 Alarm Table (GDC NMS510 MIB)..........................................................C-39

C-25 NMS510 Alarms Configuration Table (GDC NMS510 MIB).................................C-40

C-26 NMS510 Diagnostic Configuration Table (GDC NMS510 MIB) ...........................C-41

C-27 NMS510 Diagnostic Execution Table (GDC NMS510 MIB)..................................C-42

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Preface

ScopeThis manual describes how to install and configure a General DataComm SC 5520 Data Sulator. It is written for installers, service technicians, and users. It assumes a working knowof data interfaces, DDS data transmission service, and the Simple Network Managementcol (SNMP).

Revision HistoryThis is Issue 4 of the manual. It has been revised to reflect the addition of firmware downloand a Front Panel Test feature to the terminal interface functionality, and the addition of aproprietary code for remote loop initiation.

The third issue of the manual was revised to include information on terminal interface funality added to the unit. It also reflected elimination of the CSU Loopback Test and a cableber correction.

The second issue of the manual was revised to include information on compatibility with reNMS 520 and NMS 510 DSUs, including the MIBs that support that compatibility.

OrganizationThis manual has four chapters and three appendices. The information is arranged as foll

• Chapter 1 - Introduction describes the Data Set Emulator, its features, and its options. chapter contains the Equipment List table.

• Chapter 2 - Installation provides directions for installing the DSE in a SpectraComm Shand making the cable connections it requires.

• Chapter 3 - Operation describes the DSE command and monitoring functions that canperformed by means of front panel controls and indicators, and by means of the terinterface.

• Chapter 4 - Tests describes tests that can be performed on the DSE by means of its panel controls, by means of the terminal interface, or by the Telco Serving Test Cen(STC).

• Appendix A- Technical Characteristics

• Appendix B- DTE Interface Signals lists pin/signal assignments for the three DTE interfaces that the DSE can support: EIA/TIA-232-E, ITU-T V.35, and EIA-530.

• Appendix C- SC 5520 MIB Support consists of tables defining the Management Information Base (MIB) objects that enable SNMP control of the DSE and its remotDSUs.

GDC 076R102-000, Issue 4

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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 key-board.

Related PublicationsThe following documents have additional information that may be helpful when using this uct:

• GDC SC 5001 Line Terminating Unit Installation and OperationGDC 032R101-000

GDC publication numbers (e.g., GDC 032R101-000) are used to track and order technical mauals. Publication numbers use the following format:

GDC NNNRnnn-000 or GDC NNNRnnn-Vnnn

• NNN identifies the product family (e.g. SpectraComm)

• R denotes a technical publication

• nnn a number assigned by Technical Publications

• 000 identifies a hardware product and does not change

• Vnnn the software version associated with a product may be updated periodically

The Issue Number only changes when a hardware manual is revised or when a manual is refor some other reason; it does not automatically change when the software is updated. A Software Version is always Issue 1. Other specialized publications such as Release Notesdenda may be available depending on the product.

Service and SupportGeneral DataComm is committed to providing the service and support needed to install, mand maintain your equipment. For information about service programs or for assistance witsupport requirements, contact your local Sales Representative or call General DataComm Sat 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 nexable support representative will promptly return your call.

Notes present special instructions, helpful hints or general rules.

NOTE

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Hands-on training courses are provided by GDC Educational Services. Courses range fromdata communications, modems and multiplexers, to complex network and ATM systems ataught in Connecticut or at a customer location. To discuss educational services or receivcourse schedule, call 1-800-243-1030 and follow the menu instructions.

Safety Instructions

Antistatic Precautions

Electrostatic discharge (ESD) results from the buildup of static electricity and can cause comcomponents to fail. Electrostatic discharge occurs when a person whose body contains a buildup touches a computer component.

The equipment may contain static-sensitive devices that are easily damaged, so proper haand grounding are essential. Use ESD precautionary measures when installing parts or carkeep the parts and cards in antistatic packaging when not in use. If possible, use antistatipads and workbench pads.

When handling components or setting switch options always use an antistatic wrist strap coed to a grounded equipment frame or chassis. If a wrist strap is not available, periodically touchan unpainted metal surface on the equipment. Never use a conductive tool, such as a screwdrivor a paper clip, to set switches.

Safety Guidelines

The following symbols are used in this manual to draw your attention to potential hazards. Ation indicates a hazard to equipment or data. A Warning indicates a hazard to personnel.

Always use caution and common sense. To reduce the risk of electrical shock, do not operate aequipment with the cover removed. Repairs must be performed by qualified service personneonly.

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.

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Glossary of Terms

Backplane Data Highway

High speed bus built into the SpectraComm Shelf backplane to support the exchange of datiming signals between a line terminating unit and up to 24 data set emulators. The backplatains four data highways. Two backplanes, and their data highways, can be connected bychain 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.DSE is designed to be compatible with a GDC device that can be installed as a standalonea remote site. An SC 5520 DSE, for example, is compatible with a remote NMS 510 DSU or520 DSU.

Line Terminating Unit

Term for the unit in the SpectraComm 5000 system that provides T1 network interface func

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1 Technical Overview

DescriptionThe SpectraComm 5520 Data Set Emulator (DSE) is part of the SpectraComm 5000 famproducts from General DataComm. An SC 5000 system consists of DSEs to provide inteace functions for data terminal equipment (DTEs) and one or more Line Terminating Units to vide network interface. The system consolidates data traffic between a user-owned centrcommunication site and a Telco central switching office, and enables the use of a single,capacity line. Unlike a multiplexer, which consolidates data traffic for transmission over a pto point link, the SC 5000 system performs "line grooming" that permits the switching officseparate the signal back into its component parts for transmission to multiple locations.

The SC 5520 DSE pc card provides the channel interface functionality of a multi-rate datvice unit (DSU) capable of operating in standard DDS, DDS with a secondary channel (DSC), or 64 Kbps clear channel mode. It can support DTE data rates of 2.4, 4.8, 9.6, 19.2,and 64.0 Kbps. It is termed a data set emulator rather than a DSU because, instead of inits 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 SC 5520 DSEs installedthe LTU, in a pair of SpectraComm Shelves. The DSEs and LTU exchange channel datameans of a data highway implemented in the SpectraComm Shelf backplane. The backplavides four data highways, so a pair of SpectraComm Shelves (32 slots, total) can accommup to four LTUs, each with its own group of associated DSEs.

In addition to DSEs and LTUs, each SC 5000 system includes a GDC SpectraComm Ma(SCM) card to provide comprehensive network management capabilities using the Simplwork Management Protocol (SNMP). The SCM card acts as the local control device for thecomponents 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 manat a central site. You can also perform diagnostic testing and alarm management.

The basic SC 5520 DSE is a 7-inch by 9.5-inch (178 mm by 241 mm) printed circuit (pc) It conforms to the unique GDC SpectraComm packaging concept that enables a variety ocommunication products to be mounted in the same high-density shelf. Each 16-slot shehold 16 single card devices.

The following optional piggyback cards may be mounted on the SC 5520 base card:

530 Interface Card — This option card supports the use of an EIA-530 DTE interface. When the 530 Interface Card is not installed the DSE provides EIA/TIA-232-E and Vinterfaces by soft-strap selection or automatic sensing.

Data Rate Adapter Card — This option card can adapt a synchronous or asynchronDTE data transmission speed of 19.2, 9.6, 4.8, or 2.4 Kbps to an aggregate line spe56 or 64 Kbps. At 56 Kbps it can be used in both point-to-point and multipoint applications. At 64 Kbps it can be used in point-to-point applications only.

Table 1-1 defines part numbers for standard and optional equipment available for the SCDSE. Appendix A lists its technical characteristics.

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SC 5520 Data Set Emulator FeaturesThe SC 5520 DSE provides the following features:

• Operates in Standard DDS mode, DDS with secondary channel mode, and clear ch(64 Kbps) mode.

• Communicates with SNMP controller through the shelf-resident SpectraComm Mana(SCM) card for comprehensive, non intrusive network management.

• Fully compatible with Simple Network Management Protocol network management.SNMP provides complete software control for configuration, alarm reporting, and diagnostic testing capabilities.

• Provides terminal interface functions that are accessible through the shelf-resident SCM card using either a VT100-compatible ASCII terminal or a computer running the Telnprotocol.

• Available with DTE interface that conforms to EIA/TIA-232-E, ITU-T V.35, or (with optional plug-in card) EIA-530.

• Senses and adapts automatically to the connection of either EIA/TIA-232-E or V.35 equipment at its DTE interface (this is a configurable feature that can be disabled).

• Compatible with remote NMS 520 and NMS 510 DSUs for transmission and receptiouser data.

• Stores operating firmware in flash based memory that supports downloading of newapplication firmware by means of TFTP for upgrades

• Supports dual application firmware storage, with user control of switchover between aand standby firmware versions

ManagementAs an SNMP controlled device, the SC 5520 receives configuration and commands in theof entries in its Management Information Base (MIB) tables. The SCM card stores and adters MIBs for the DSEs and LTUs in its SpectraComm Shelf. The SCM card communicatesan SNMP controller, and passes commands and responses between the controller and th

Diagnostic testing performed through SNMP does not require intervention by personnel at rsites. The operator can select Alarm reporting to occur on any of the following conditions:

EEPROM Checksum ErrorReceive Data LossFront Panel Test

External Clock LossTest Mode ShortedData Set Ready Loss

Data Terminal Power LossData Set Ready ShortedData Terminal Ready Loss

Data Carrier Detect LossTransmit Data Loss

Data Carrier Detect ShortedSTC Loopback

Clear To Send Shorted

Receive Data Shorted

Receive Clock Shorted

Transmit Clock Shorted

The DSE facilitates fault isolation in a digital network by providing comprehensive loopbacktesting capabilities, that include Local Test, Remote Loop, Data Loop and Self-Test. The opcan use these loopbacks and tests to isolate system faults to a particular DTE, data set, o

GDC 076R102-000, Issue 4

Technical Overview 1-3

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ApplicationThe SC 5520 DSE works in conjunction with the SC 5001 LTU to provide a groomed T1 eronment. The SC 5000 system grooms the local end of multiple DDS circuits into a single Tgregate. Refer to GDC Publication No. 073R100-000 for specific details on the SC 5001 LTU. The SC 5520 DSE is compatible with a remote NMS 520 or NMS 510 DSU, and can pass dany existing DDS-compatible DSU.

The SC 5520 DSE is software programmable to interoperate with the following DDS networerating configurations:

• DDS I (Standard DDS)

• DDS/SC (DDS with Secondary Channel)

• DDS 64 (Clear Channel)

Data Rate Adapter Applications

Figures 1-1 and 1-2 illustrate timing configurations for use when the DSE has the optional DRate Adapter card installed for synchronous operation. In these applications always optioDSE for Receive timing from the network. External timing sources must be 100 PPM.

Figure 1-1 Data Rate Adapter Application 1(Master: Internal, Slave: Internal)

Figure 1-2 Data Rate Adapter Application 2(Master: External, Slave: Internal)

DSEDTEDRA

LTU DSUDRA

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17 RT

15 ST

Master Slave

DSEDRA

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24 Master Slave

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Table 1-1 Equipment List

Description GDC Part No.

GDC SC 5520 Data Set Emulator (compatible with remote NMS 520 DSU) 076P020-001

GDC SC 5520 Data Set Emulator (compatible with remote NMS 520 and NMS 510 DSUs; supports terminal interface and Telnet)

076P020-002

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)Includes two 8-slot, dual RJ48 Zone 1 connector panels

010M070-001

Unless otherwise stated, systems include one base shelf, one power supply and one power supply blank front Zone 1 connector panels as stated, one 16-slot DB25 Zone 3 connector panel, two standard mounting bracke(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 Assembly027H501-001

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*

Options

EIA-530 Interface Module 048P042-001

Data Rate Adapter (DRA) card 058P128-002

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.

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2 Installation

OverviewThis chapter describes the installation of the SC 5520 DSE.

The SC 5520 DSE is shipped pre-assembled, tested, and ready to use. There are no haoptions to be set on the SC 5520 DSE pc card.

The normal procedure after unpacking the unit is to insert it in its intended shelf slot and pethe Preoperational Check described in this chapter. When the test is successfully complemay make the DSE cable connections.

The SC 5520 DSE should be installed in a ventilated area where the ambient temperaturnot exceed 122°F (50°C). Do not install the DSE above other equipment that generates amounts of heat (e.g., power supplies).

SpectraComm ShelfA rack-mountable SpectraComm Shelf can house up to 16 plug-ins. It fits into 19- and 23wide equipment racks. The backplanes of two shelves can be linked by cables so that a 32 card slots function as though connected to the same backplane. The SC 5520 DSE cinstalled in any card slot.

The shelf backplane is made up of four separate "data highways" and a management busdata highway supports the transfer of data between an LTU and its DSEs, so there can bfour LTU/DSE functional groupings in a shelf (or pair of shelves). The management bus ports the transfer of management data between an SCM card and the DSEs and LTUs in thThe SCM card functions as an SNMP agent for the control of compatible devices, such aDSE and LTU, in the shelf. The SpectraComm Shelf can contain a single SCM card, or tSCM cards installed as a primary and a backup.

An LTU/DSE functional group can consist of one or two LTUs (one primary and one backand up to 24 DSE cards. The application determines the exact selection of pc cards to be inin a shelf. An LTU can be combined with 24 DSE channels only when each channel requjust a single DS0. The number of DSE cards the LTU can support is reduced when channploy N X 56 Kbps or N X 64 Kbps rates. For example, the LTU can support no more thanDSE cards when each DSE is providing a 128 Kbps channel.

Two SC 5001 LTUs can be installed in a primary/secondary arrangement. If the primarymalfunctions, the SNMP controller can command the secondary LTU to take over.

Figure 2-1 shows the SpectraComm Shelf back panel. An SC 5520 DSE employs only onepanel connector: the DB25 connector in Zone 3 serves as its DTE interface.

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nos-

Figure 2-1 SpectraComm Shelf Back Panel

Unpacking and HandlingThe SC 5520 DSE is shipped enclosed in a corrugated box and protected by packing matInspect the SC 5520 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 5520 DSE.

Preoperational CheckYou should verify that the SC 5520 is in good working order by means of two tests: the PoUp Test that the unit performs automatically, and a Local Test with Self Test that you perfusing the front panel controls.

Power Up Test Sequence

Inserting the SC 5520 DSE into the shelf automatically initiates a four-part Power Up Test, wyou should observe by watching the front panel during power up. The following events verifythe SC 5520 DSE is in good electrical working order:

1. All LEDs and all segments of the 4-character, 7-segment LCD display light and are easible.

2. The SC 5520 front panel displays "SELF" and the Test Mode (TM) indicator lights, cating 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 "5520" product name following the results of the internal diagtic test.

J51: 40-pin signal

J50: Shelf address

J49: 50-pin power Slot B Slot A

Power

J52: 30-pin signal

Zone 1

Zone 2

Zone 3

16-slot Zone 3 connector panel shown

DTE cable for SC 5520 DSE attaches to

bus connectorjumper

bus connector

supplysection

bus connector

the DSE.DB25 that corresponds to the slot containing

with one DB25S connector (J1 to J16) per slot.

GDC 076R102-000, Issue 4

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is a tact anual.

E, you a-

op and

the

ee.

ng the

one is phone

DSE

con-

ctors.

source

If any of those four events does not occur, or if "FAIL" is displayed instead of "PASS" thereproblem with the unit. Install a spare unit if one is available. If you require assistance, conGeneral DataComm Service at the toll-free telephone number listed in the Preface of this mDo not attempt to repair the SC 5520 DSE.

Local Test/Self Test

Once the SC 5520 DSE has passed the Power Up Test and before you connect it to its DTshould perform a Local Test with Self Test to verify that the internal circuits of the DSE are cpable 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 loa Test Pattern Checker to verify the signal.

1. Initiate the test by briefly pressing the LT (Local Test) and Self Test (ST) switches on front panel. The LT, ST, and TM (Test Mode) indicators are On during the test.

2. Run the test for approximately 15 seconds.

3. The TM indicator blinks when an error is detected. The test should run entirely error-fr

4. If the test is successful, the TM indicator remains On until you end the test by depressiLT 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 available. If you require assistance, contact General DataComm Service at the toll-free telenumber listed in the Preface of this manual. Do not attempt to repair the SC 5520 DSE.

Installation Procedures

Module Installation Procedures

An SC 5520 DSE card may be installed in any slot in a SpectraComm Shelf. To install thecard in the shelf:

1. Insert the module into its slot with the GDC logo on top, then slide it in until it makes tact.

2. Pull down the ejector tab and firmly push the module in until it seats in the rear conne

Data Rate Adapter Card

To field install a Data Rate Adapter (DRA) piggyback card refer to Figure 2-2 and the following text. Ensure that the SC 5520 DSE is disconnected from service and from the main power before you proceed with the installation.

Use of the Data Rate Adapter might impact round-trip delays inthe network to varying degrees for different data rates. Network design engineers should consult GDC Tech Support if in doubt.

The DRA does not supply test voltages +12 V on EIA-232 Pin 9 and –12 V on EIA-232 Pin 10 of the Business Equipment connector.

NOTE

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async

acter

of the

nd

and with

ER

Data Rate Adapter Card Options

EXT/INT (X1) — This option provides clock selection for internal (Default) or external timin

B0, B1, (S1-1, S1-2) — When Switch S1-3 is OFF (Sync mode), Switches S1-1 and S1-2 mine synchronous DTE data rate. The switch settings for each rate are as follows —

B0 (S1-1)B1 (S1-2)DTE Data Rate (bps)

OFF OFF 2400

ON OFF 4800

OFF ON 9600

ON ON 19.2K

When Switch S1-3 is ON (Async mode), Switches S1-1 and S1-2 determine asynchronoudata rate. The switch settings for each rate are as follows —

B0 (S1-1)B1 (S1-2)DTE Data Rate (Bps)

OFF OFF 1200

ON OFF 2400

OFF ON 9600

ON ON 19.2K

• ASYNC (S1-3) — ON enables asynchronous DTE transmission. OFF selects synchroDTE communication.

• 7B/8B (S1-4) — When asynchronous operation is selected, ON selects 7 data bits percharacter and OFF selects 8 data bits per async character.

When synchronous multipoint operation is selected, ON selects 8 data bits per charand OFF selects 5 data bits per character.

• P/64 (S1-5) — When asynchronous operation is selected, ON enables transmissionparity bit and OFF inhibits transmission of the parity bit.

When synchronous operation is selected, ON provides 64 Kbps rate adaption to theaggregate line rate and OFF provides 56 Kbps rate adaption.

• OD/EX (S1-6) — When asynchronous operation is selected, ON selects odd parity aOFF selects even parity.

When synchronous multipoint operation is selected, ON selects external (DTE) timingOFF defaults to internal timing. This switch selects the timing source in conjunction the X1 header.

MPT (S1-7) — ON for multipoint operation; OFF for point-to-point applications,.

• SLV (S1-8) — In multipoint applications only, OFF options the DSE to be the MASTand ON options the DSE to be a SLAVE (Remote).

When the DSE is operating in synchronous mode, the Send Data (SD) and Receive Data (RD) LEDs are dimly lit when the DSE is not passing data. NOTE

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A1P3, r an op-r card

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Data Rate Adapter Card Installation

The Data Rate Adapter plugs into the SC 5520 DSE pc card through connectors XA1P2, Xand XA1P1. The connectors and the space on the card can be used for either the DRA otional 530 interface plug-in card. Berg-type jumpers are installed in the connectors if neitheis installed.

If the 530 card is present, first remove the two screws that attach it to the base card. Thestraight up on the 530 card to remove it from the base card.

If the 530 card is not present, pull out the jumpers on the connector.

Install the DRA card to connectors XA1P2, XA1P3, and XA1P1 on the base card, componside down. Secure the card with one screw from the bottom of its base card and reassembunit.

Figure 2-2 Data Rate Adapter Card

EIA-530 Card Installation

The EIA-530 interface requires an optional, plug-in, piggyback card. The EIA-530 card mateswith the base card via connector XA1P1 and it can be oriented in either of two positions (see Fig-ure 2-3). In one position, the 530 card provides an EIA-530 interface. In the other positionacts as an XA2P1 jumper so that the EIA/TIA-232-E or V.35 interface can be selected with theplug-in card mounted. Finally, the plug-in card may be removed entirely and jumpers, or gram plug placed across XA1P2 and XA1P3, so that non-EIA-530 units may operate without thecard.

1 2 3 4 5 6 7 8

When Card Is Mounted,Push Down for OFF, Up for ON

Circuit Side(As Mounted on Base Card)

S1

X1EXTINT

B0

B1

AS

YN

C

7B/8

BP

/64

OD

/EX

MP

TS

LV

1 2 3 4 5 6 7 8

Component Side

S1

X1EXT

INTB

0

B1

AS

YN

C7B

/8B

P/6

4O

D/E

X

MP

TS

LV

J1J2 J3

058P128

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t inter-

Figure 2-3 EIA 530 Interface Adapter Card

Electrical Power Connection

The DSE obtains power directly from the SpectraComm shelf.

Business Equipment Connections (DTE)

The SC 5520 DSE supports three business equipment interfaces: EIA/TIA-232-E, ITU-T V.35, and (optionally) EIA-530. The EIA/TIA-232-E and V.35 interface hardware resides on the card.

Appendix B describes the signals exchanged through each of the three business equipmenfaces.

The SC 5520 DSE supports automatic detection and selection of either an EIA/TIA-232-E or V.35 DTE interface. This feature requires the presence of a valid transmit data (TXD) signal. If this signal is not always present, the DTE interface type must be specified during configuration.

J1

J2J3

J5J4 EIA-530 PLUG-IN CARD

PART NO. 048P042-001

BY

PAS

S

J1

J2 J3

J5 J4EIA-530 PLUG-IN CARD

PART NO. 048P042-001

BY

PAS

S

Base card,

This illustration shows the connectorson the plug-in card to help you positionit. The connectors are actually on the underside, facing toward the base card, when you install the plug-in card.

SC 5520 BASE CARD, GDC PARTNO. 076P020-001

rear edge

To enable the EIA-530 interface, installthe plug-in card in this position. Connections:

J2 to XA1P2J3 to XA1P3J1 to XA1P1

J5 and J4 are not used.

To bypass the EIA-530 interface, installthe plug-in card in this position. Connections:

J2 to XA1P2J3 to XA1P3

J1, J4, and J5 are not used.

There are jumpers on XA1P2and XA1P3 when the optionalplug-in card is not present.

XA

1P2

XA

1P3

XA1P1

NOTE

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E slot always

um-

n for

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Hz ither a e

rnal ing

DSE Addressing

The network management system employs a slot-line-drop method of addressing. The DSaddress is the number of the slot it occupies in the SpectraComm Shelf. Its line address is 1, and the DSE is drop 0 for its line.

In a point-to-point circuit the single remote unit is drop 1. In a multi-point circuit the drop nbers of the remote units are selectable.

If the firmware is ever changed on the SC 5520 DSE, the EEPROM containing configuratiothe DSE is automatically erased and the unit has to be reconfigured.

Timing Options

Timing options determine the clock source for the data the SC 5520 DSE transmits to thework. 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 orelationship between components in the SC 5000 system. In an SC 5000 system the seleReceive timing actually means the use of a system shelf timing signal taken from the shelf plane. A DSU derives Receive timing directly from the signal it receives at its network interface.

The SC5000 MIB, detailed in Table C-16, enables or inhibits the DSE as the source of the 8 Ksystem shelf timing signal on the backplane. One component in each SC 5000 system, eDSE or an LTU, may be configured to provide the 8 KHz signal. The MIB also controls thsource 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 either Inteor External transmit timing. All other DSEs in the system must be configured for Receive timso that they use the system shelf timing signal.

GDC 076R102-000, Issue 4

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3 Operation

OverviewThis chapter begins by describing the functions of the SC 5520 DSE front panel indicatordisplays and limited test functions.

The chapter then provides instructions for using the DSE terminal interface to control andmonitor its functions. Through the terminal interface you can alter the configuration of the Dinvoke more extensive diagnostic test functions, view the current status of DTE interface sand unit alarm conditions, and display information on the unit.

This chapter describes how to access the DSE diagnostic functions by means of the terminal interface. Chapter 4, Tests, describes the actual test procedures in detail.

Access to the DSE terminal interface functionality takes place through a SpectraComm Ma(SCM) card installed in the SpectraComm shelf that houses the DSE. The SCM card suptwo types of connection for terminal interface functions:

• connection of a VT100-compatible terminal via the Craft port on the SCM front pane

• Telnet connection via the SCM LAN port located on the back panel of the shelf

There are small differences between the two types of connection.

In addition to the terminal interface, you can control and monitor the SC 5520 DSE by meaa Simple Network Management Protocol (SNMP) controller software application, such asTEAM 5520 application available from GDC. Specifics of SNMP control depend on the coapplication that you use, and so are beyond the scope of this manual. Consult the manual fSNMP controller for detailed instructions on the use of its functions. This manual does prinformation specific to the SC 5520 DSE as a supplement to those instructions, in particulMIB tables contained in Appendix C.

Controls and IndicatorsFigures 3-1 and 3-2 illustrate the SC 5520 DSE front panel and explain the function of each trol and indicator.

SpectraComm Shelf

The manual supplied with the SpectraComm shelf describes front panel controls, indicatorfuses for the shelf.

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3-2 Operation

Figure 3-1 Front Panel Indicators

INS ON

SD RD

RS CO

TMG RSP

TM ALM

ST

LT

RL

DL

5520

Green

Red

Power On -Lit while power is applied to the DSE

In Service -Lit when the DSE has been placed into service by the network controller

Received Data -Lit when the DSE is in data mode and a space is de-tected in the receive data

Carrier On -Lit when the DSE is in data mode and carrier is being received from the network. Also lit when the DSE is in test mode.

Response -Lit while the DSE is in transmitting a re-sponse to a network controller command

Rate Display -Displays the current DSE data rate in kbps.

Alarm -Flashes while the DSE is experiencing an alarm condition

Test Mode -Lit when the DSE is performing any type of test.

Blinks to indicate detected errors dur-ing a Self Test.

Timing -Lit when the DSE is designated as the source of timing for its shelf (8Kclock)

Request to Send -Lit when the RTS is asserted by the DTE

Send Data -Lit when the DSE is in data mode and a space is detected in the transmit data.

GDC 076R102-000, Issue 4

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Figure 3-2 Front Panel Controls

INS ON

SD RD

RS CO

TMG RSP

TM ALM

ST

LT

RL

DL

5520

Green

Red

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.

The Line Loopback Test Points option, one of the configurable Diagnostic Op-tions for the DSE, selects Local Test to be either unilateral (toward the DTE only) or bilateral (transmit data looped back to the DTE, receive data looped back to the network).

Self Test -Momentary switch. When pressed, en-gages the test pattern generator/checker employing test pattern select-ed in configuration. LED is lit while Self Test is active. Press switch a second time to turn off Self test.

Remote Loop -Momentary switch. When pressed, causes the DSE to send a loopback command to the remote unit. DSE is configurable for GDC proprietary, PN127, or V.54 loopback command. Remote loopback test requires a com-patible device that recognizes the com-mand being used. LED is lit while the test is in progress. Press switch a sec-ond time to end 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.

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Terminal InterfaceAccess to the SC 5520 DSE terminal interface takes place through the SCM, which provides thisfunctionality for the DSEs installed with it in a SpectraComm shelf or a pair of shelves connby daisy chain cables. One SCM, then, supports interface functions for up to 15 units in a shelf or up to 31 units in a pair of shelves.

The SC 5520 DSE requires firmware revision level F- or higher to support the terminal intefunctionality.

Initiating a Terminal Interface Session

The first portion of a terminal interface session varies depending on whether you’re usingVT100-compatible terminal connected directly to the SCM front panel or a computer with Telnet connection to the SCM LAN port.

VT100-compatible Terminal

When you connect a terminal to the SCM front panel, the first screen to appear is the Mainscreen shown in Figure 3-3.

Figure 3-3 SCM Main Menu Screen

Type 3 and press the Enter key. The screen then displays the Shelf Inventory screen that in Figure 3-5.

The other selections in this menu all relate to SCM functionality. They are discussed in theSpectraComm 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 yso, the Telnet Connection Login screen shown in Figure 3-4 is the first to appear

Figure 3-4 Telnet Connection Login Screen

Main Menu1. IP Address 2. Passwords 3. Element Access 4. Test

Copyright (c) 1993-1997 General DataComm Industries Inc. All rights reserved SCM Application Version 3.2

login:

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screen shelf.

t that

E

use

After you enter the login password the screen displays the Shelf Inventory screen that appFigure 3-5.

Selecting a DSE (Shelf Inventory Screen)

From this point, procedures are the same for both types of connection. The Shelf Inventory in Figure 3-5 below is for a two-shelf installation in which two LTUs support a total of 29 SC5520 DSEs. The two columns for Slots 17 through 32 do not appear when there is only one

Figure 3-5 Shelf Inventory Screen

The Shelf Inventory displays the word "alarm" in parentheses next to the name of any unicurrently has an active alarm condition.

Type the slot number of the unit you intend to work with, and press the Enter key. The DSresponds by displaying the SC 5520 Main Menu.

Main Menu

The SC 5520 Main Menu screen, shown in Figure 3-6, is the access point to the individual terminal interface functions. Type the number that corresponds to the function you need toand press the Enter key.

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.

NOTE

SHELF INVENTORY

Slot Card Slot Card

-------------------------------------------------------

[1] SCM [17] SC5001

[2] SC5001 [18] SC5520

[3] SC5520 [19] SC5520

[4] SC5520 [20] SC5520

[5] SC5520 [21] SC5520

[6] SC5520 [22] SC5520

[7] SC5520 [23] SC5520

[8] SC5520 [24] SC5520

[9] SC5520 [25] SC5520

[10] SC5520 [26] SC5520

[11] SC5520 [27] SC5520

[12] SC5520 [28] SC5520

[13] SC5520 [29] SC5520

[14] SC5520 [30] SC5520

[15] SC5520 (alarm) [31] SC5520

[16] SC5520 [32] SC5520

[0] Close Session [C] Circuit Identification

Enter slot number: [ ]

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Figure 3-6 Main Menu Screen

Configuration

The Configuration function presents a screen of configuration options. Each option is idenby a selection number or letter, and displays its current setting.

Figure 3-7 Configuration Screen, with Default Settings

S C 5 5 2 0

SHELF SLOT = 6

[1] Configuration [2] Diagnostics

[3] Alarm Configuration [4] Monitor/Alarms

[5] Maintenance

[0] Return to Shelf Inventory

Select: [ ]

SC 5520 Configuration Shelf timing: Disable Data Highway: One [1] Network: Circuit Type: Pt to PT DDS - 1 [2] Carrier: TX Const. RX Const. [3] Data Rate: 56 kbps - Sync [4] Circuit: TX Clock Source: Receive [5] Buffer Clock: Internal [6] Zero Encoding: Enable [7] Remote Unit Type: NMS 510 [8] Sentry Timer (pt to pt): 60 Minutes [9] Remote Response Interval: 10 Seconds [A] Circuit Assurance: Disable [B] System Status: Disable [C] DTE Control: AAS: Disable [D] Constant DSR: Enable [E] CTS Delay: CTS ON [F] HDLC Invert: Disable [G] Interface Type: Auto [H] Async: Character Size: 11 Bits [I] Overspeed: 1% [J] Suppression: Disable [K] Rate Adaption: Disable [0] Return to Main Menu [S] Save & Update Unit Select: [ ]

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en, the

ou typean per-

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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 thekey. 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 rto 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 andpress 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 thchanged 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 theeither make further changes or proceed to dismiss the screen.

7. To dismiss the Configuration screen, type selection 0, Return to Main Menu, and pressthe Enter key. If there are no unsaved changes the display returns to the SC 5520 Mainand the configuration procedure is complete.

8. If there are unsaved changes when you attempt to dismiss the Configuration screprompt Pending Edits, Exit without saving (Y/N)? appears. You can typeY and press the Enter key to dismiss the screen and discard the unsaved changes. If yN and press the Enter key, the Configuration screen remains on display so that you cform 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 asettings available for each.

Table 3-1 SC 5520 Configuration Option Settings

(Continued on next page)

Option Potential Settings

[0] Return to Main Menu

[1] Network: Circuit Type: Point to Point DDS-1

Point to Point DDS-SC

Point to Point Clear Channel

Multipoint DDS-1

Multipoint DDS-SC

[2] Carrier: TX Constant, RX Constant

TX Constant, RX Switched

TX Switched, RX Constant

TX Switched, RX Switched

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3-8 Operation

Table 3-1 SC 5520 Configuration Option Settings (Continued)


Option Potential Settings[3] Data Rate: 64 kbps Synchronous

56 kbps Synchronous

19.2 kbps Synchronous




19.2 kbps Asynchronous




[4] Circuit: TX Clock Source: Receive

External

Internal

[5] Buffer Clock: Internal

External

[6] Zero Encoding: Enable

Disable

[7] Remote Unit Type: NMS 510

NMS 520

[8] Sentry Timer (pt to pt): 1 – 120 Minutes

Disable

[9] Remote Response Interval: 10 – 120 Seconds (10-second increments)

Disable

[A] Circuit Assurance: Enable

Disable

[B] System Status: Enable

Disable

[C] DTE Control: AAS: Enable

(Auto Anti Streaming) Disable

[D] Constant DSR: Enable

Disable (follows DTR)

[E] CTS Delay: CTS On

0 msec

Fixed 3 Char

30 msec

60 msec

90 msec

[F] HDLC Invert Enable

Disable

[G] Interface Type Auto

RS232

V.35

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Table 3-1 SC 5520 Configuration Option Settings (Continued)

Diagnostics

The terminal interface SC 5520 Diagnostics screen combines configuration and commandfunctions. Selections 1 through 9 are configuration options that affect DSE diagnostic functionality. Changes to the options don’t go into effect until you save them to the unit. Osaved, they remain in effect until new changes are made and saved.

Selections A through F are command fields by which you can begin and end test procedureTest Results field below selection F displays the results of tests that employ Self Test. Theis either Passed, if no errors are detected, or the number of RX Errors.

Figure 3-8 illustrates the Diagnostics screen. Detailed instructions for setting its configuratoptions follow the illustration. Instructions for using the screen to perform tests appear in Chapter 4, Tests, together with descriptions of the diagnostic functions.

Option Potential Settings[H] Async: Character Size 11 bits

10 bits

9 bits

8 bits

[I] Overspeed 1%

2.3%

[J] Suppression RX + TX EOT

TX EOT

RX EOT

Disable

[K] Rate Adaption Disable

1200

600

1800 to 2400

Be especially careful in setting Option 7, Remote Unit Type. The DSE may not be able to correctly recognise the type of communication link between itself and its remote unit if that option is set incorrectly. NOTE

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Figure 3-8 Diagnostics Screen

The procedure for changing Diagnostic configuration option settings involves the followingsteps:

1. Type the selection number of the option you intend to change, and press the Enter keylighting 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 rto the Select field.


5. After you’ve made all required changes, type selection S, Save 1 - 9 & Update Unitand 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 thchanged configuration into effect in the DSE. You can then perform tests or proceed tmiss the screen.

If you decide not to put your changes into effect, type N and press the Enter key. You can themake further changes, perform tests, or proceed to dismiss the screen.

7. For instructions on performing tests, consult Chapter 4. To dismiss the Diagnostics screentype selection 0, Return to Main Menu, and press the Enter key. If there are no unsavdiagnostic configuration changes, the display returns to the SC 5520 Main Menu and thcedure is complete.

SC 5520 Diagnostics Diagnostic Options [1] DTE: Line Loopback Control: Disable [2] Remote Loopback Control: Disable [3] Data Set Ready: Normal [4] Network: Line Loopback Test Pts: DTE Only [5] Telco Latching Loopbk Rsp: Enable [6] Remote Loop Receive: Enable [7] Remote Loop Auto Timeout: Disable [8] Remote Loop Initiation Seq.: V.54 [9] Self Test Pattern: 511

T E S T S: [A] Line Loopback: Idle [B] Line Loopback & Self Test: Idle [C] Remote Loopback: Idle [D] Remote Loopback & Self Test: Idle [E] Digital Loopback: Idle [F] Self Test: Idle Test Results:

[0] Return to Main Menu [S] Save [1] - [9] & Update Unit Select: [ ]

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Table 3-2 lists the Diagnostic configuration options that appear on the terminal interface disand all the settings available for each.

Table 3-2 SC 5520 Diagnostic Configuration Option Settings

Alarm Configuration

The Alarm Configuration function presents a screen of configuration options that determinwhich alarms the DSE is to report. Unit and DTE alarms can be individually designated eithbe reported when they occur or to masked (not reported). For definitions of the alarm condconsult the description of the Monitor/Alarms screen, which begins on page 3-13

Each option on the Alarm Configuration screen is identified by a selection number or letterdisplays its current setting.


[1] DTE: Line Loopback Control: Disable (default)

Enable

[2] Remote Loopback Control: Disable (default)

Enable

[3] Data Set Ready (this option is valid only when Configuration option Constant DSR is Disabled)

Normal (default - DSR Off during DL and ST)

Off During LT Test (DSR Off during LT, DL, and ST)

[4] Network Line Loopback Test Pts DTE Only (default)

Network & DTE

[5] Telco Latching Loopback Rsp Enable (default)

Disable

[6] Remote Loop Receive Enable (default)

Disable

[7] Remote Loop Auto Timeout Disable (default)

10 minute

[8] Remote Loop Initiation Seq. GDC (default)

V.54

PN 127

[9] Self Test Pattern 511 (default)

15 bit

2047

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e

Figure 3-9 Alarm Configuration Screen, with Default Settings

The procedure for changing Alarm Configuration option settings involves the following ste

1. You may want to begin with the Report All or the Report None command, dependinhow you intend to set the majority of the alarm options. Type R for Report All or N forport 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 to change individual options, follow steps 2 through 5.

2. Type the selection number or letter of the option you intend to change. Highlightinpears on the current setting field for the corresponding option.

3. Use the arrow keys to toggle the highlighted field between its potential settings: Maskedand Report .

4. When the field displays the desired setting, press the Enter key. The highlight returnsSelect field.


6. After you’ve made all required changes, type selection S, Save & Update Unit andpress 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 thchanged configuration into effect in the DSE.

If you decide not to put your changes into effect, type N and press the Enter key. You canthen either make further changes or proceed to dismiss the screen.

8. To dismiss the Alarm Configuration screen, type selection 0, Return to Main Menu,

SC 5520 Alarm Configuration

[R] Report All Alarms, [N] Report None

[1] Unit: EEPROM Checksum: Masked [2] Front Panel Test: Masked [3] STC Loopback: Masked [4] ICC (Inactive Channel Code): Masked [5] DTE: DTP Loss: Masked [6] DCD Loss: Masked [7] DSR Loss: Masked [8] DTR Loss: Masked [9] RXD Loss: Masked [A] TXD Loss: Masked [B] External Clock Loss: Masked [C] Test Mode Shorted: Masked [D] DCD Shorted: Masked [E] DSR Shorted: Masked [F] CTS Shorted: Masked [G] RXD Shorted: Masked [H] RXC Shorted: Masked [I] TXC Shorted: Masked

[0] Return to Main Menu [S] Save & Update Unit Select: [ ]

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Operation 3-13

C 5520

creen,

nges. Ifay so

and

ation

als as a

o pear

return

and press the Enter key. If there are no unsaved changes the display returns to the SMain Menu and the configuration procedure is complete.

9. If there are unsaved changes when you attempt to dismiss the Alarm Configuration sthe prompt Pending Edits, Exit without saving (Y/N)? appears. You cantype Y and press the Enter key to dismiss the screen and discard the unsaved chayou type N and press the Enter key, the Alarm Configuration screen remains on displthat you can perform a Save or make further changes before you type 0 again to dismissthe screen.

Table 3-3 lists the Alarm Configuration options that appear on the terminal interface displaythe settings available for each.

Table 3-3 SC 5520 Alarm Configuration Option Settings

Monitor/Alarms

The terminal interface SC 5520 Monitor/Alarms function displays a screen of status informconcerning DTE interface signals and alarm conditions. Figure 3-10 illustrates the Monitor/Alarms screen.

The DTE Status portion of the screen displays the current status of eight DTE interface signOFF, ON, or TRANS. TRANS indicates that the signal is transitioning, as opposed to being inprolonged On or Off condition.

The Alarm Status portion of the screen displays ACTIVE or NO for each alarm condition tindicate whether or not the condition currently exists. Definitions of the alarm conditions apbelow.

When you are done viewing the Monitor/Alarms screen, type 0 and press the Enter key to to the Main Menu.


[1] Unit: EEPROM Checksum

[2] Front Panel Test

[3] STC Loopback

[4] ICC (Inactive Channel Code)

[5] DTE: DTP Loss

[6] DCD Loss

[7] DSR Loss

[8] DTR Loss

[9] RXD Loss

[A] TXD Loss Masked (default) or Report

[B] External Clock Loss

[C] Test Mode Shorted

[D] DCD Shorted

[E] DSR Shorted

[F] CTS Shorted

[G] RXD Shorted

[H] RXC Shorted

[I] TXC Shorted

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0 eld.

Figure 3-10 Monitor/Alarms Screen

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 corruptedExternal Clock Loss – indicates loss of external clock signal from the DTE DTP Loss – indicates loss of power at the DTE DCD Loss – indicates loss of incoming dataDCD Shorted – indicates a short circuit in the DCD interface leadCTS Shorted – indicates a short circuit in the CTS interface leadRXD Shorted – indicates a short circuit in the RXD interface leadRXC Shorted – indicates a short circuit in the RXC interface leadTXC Shorted – indicates a short circuit in the TXC interface lead

The screen updates every five seconds so that current information is always displaThe 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 typingwhile an update is taking place. Wait until the cursor highlight returns to the Select fi

NOTE

SC 5520 Monitor/Alarms

DTE Status 1

TXD: TRANS RXD: OFF DCD: OFFTXC: TRANS DTR: ON DSR: ONRTS: ON CTS: ON DTP: ON

Alarm Status 2

Major: Minor: Informational:EEPROM Chksum: MASKED RXD Loss: MASKED Fr. Pan. Test: MASKEDExt. Clk loss: MASKED TM Shorted: MASKED DSR Loss: MASKEDDTP Loss: MASKED DSR Shorted: MASKED DTR Loss: MASKEDDCD Loss: MASKED ICC: MASKED TXD Loss: MASKEDDCD Shorted: MASKED STC Loopback: MASKEDCTS Shorted: MASKEDRXD Shorted: MASKEDRXC Shorted: MASKEDTXC Shorted: MASKED


Select: [ ]

1 DTE signals display as OFF or - as applicable - ON or TRANS (transitioning)

2 Alarm conditions display as NO, ACTIVE, or MASKED

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Minor Alarms

RXD Loss – occurs when a unit that is configured for constant RX carrier experienceminute without transitions in the Receive Data

TM Shorted – indicates a short circuit in the TM interface leadDSR Shorted – indicates a short circuit in the DSR interface lead ICC – indicates reception of a Telco-generated Out-of-Service Code or Abnormal StCode

Informational Alarms

Front Panel Test – indicates the DSE has been commanded into a test by means of ipanel 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

TXD Loss – occurs when a unit that is configured for constant TX carrier experiencesminute without transitions in the Transmit Data

STC Loopback – indicates the DSE has been commanded into a test by the Telco STest Center (STC)

Maintenance

The terminal interface Maintenance screen displays information about the unit and providesspecialized control functions: Front Panel Switches enable/disable, Soft Reset, and ResetFactory Defaults. Figure 3-11 illustrates the Maintenance screen.

A signal shorted alarm is reported when the short circuit to ground condition occurs while the affected signal is On or Active.

NOTE

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ace ding none" The

n the

light. he for sy

urrent

y

setting

Figure 3-11 Maintenance Screen

The information display identifies the unit, its firmware revision level, the type of DTE interfselected, and its serial number. The DTE Interface Type can be "RS 232" or "V.35" depenon the setting of hardware jumpers on the DSE pc card. Interface Adapter displays either "or "installed" depending on whether or not the EIA 530 adapter daughter card is installed.presence of the adapter card renders the displayed DTE Interface Type invalid

The Maintenance screen includes five command selections:

[1] Front Panel Switches – permits you to enable or disable the hardware switches ofront panel of the SC 5520 DSE.

[2] Front Panel LED Test – when set to On causes all LEDs on the DSE front panel toThe LEDs remain lit until the command selection is set to Off. This is both a test of tLEDs themselves, and a convenience when using the terminal interface and Telnet diagnostics from a remote location. This feature enables you to identify a unit for ealocation by on-site personnel.

[3] Soft Reset – causes the DSE to perform a reset and resume operation using its cconfiguration when you type 2 and press the Enter key.

[4] Reset to Factory Defaults – causes all options in the DSE to return to their factordefault settings when you type 3 and press the Enter key.

[5] Firmware Down Load – invokes the download function, which is described on thefollowing pages.

You set Front Panel Switches or Front Panel LED Test in much the same way that you doconfiguration selections on other screens:

1. Type the selection number and press the Enter key. Highlighting appears on the field.

SC 5520 Maintenance

General Datacomm.SpectraComm 5520 Data Set Emulator

Firmware/Boot Revision: G-Serial Number: 0030000102030405Interface Adapter: none

[1] Front Panel Switches: Enabled[2] Front Panel LED Test: Off

Reset Options:[3] Soft Reset. * WARNING * Disrupts communications.[4] Reset to Factory Defaults * WARNING * Disrupts communications.

[5] Firmware Down Load.


Select: [ ]

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/Dis-

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to the

ove

Revi-rve as ctive

ve

at is

2. Use the arrow keys to toggle the highlighted field between its two values, Enabledabled or On/Off.

3. When the field displays the desired setting, press the Enter key. The highlight returnsSelect field. The new setting goes into effect immediately.

When you are done with the Maintenance screen, type 0 and press the Enter key to returnMain Menu.

Firmware Download

The terminal interface Firmware Download function enables you to load new operating firmwareinto the DSE. Loading of firmware is typically required when GDC makes changes to imprperformance or to include new features.

The SC 5520 DSE can store two versions of operating firmware, designated as the Activesion and the Standby Revision. You can have newly downloaded firmware immediately sethe Active Revision, or you can store it as the Standby Revision. You can switch between Aand Standby Revisions as needed.

Figure 3-12 Firmware Download Screen

The Firmware Download screen contains five lines of read-only information display, and ficommand selections. The following information is displayed:

Active Firmware Revision – displays the version and revision number of firmware thcurrently 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:

SC 5520 Firmware Download

Active Firmware Revision: 01.00.00 Standby Firmware Revision: 01.00.01 Standby Firmware Status: VALID- OK Download Mode: ENABLE DOWNLOADS AND STORE ZIPPED Download Status: Idle

[1] SWITCH TO STANDBY FIRMWARE NOW [2] DISABLE ALL DOWNLOADS [3] ENABLE DOWNLOADS AND STORE ZIPPED [4] ENABLE DOWNLOADS, UNZIP AND EXECUTE

[0] Return to SC 5520 Maintenance

Select: [ ]

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are;

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;

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s

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d on-nged.

l

nse by

own-

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 firmwsee 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 tran

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) tstored, inactive firmware and place it into service as the current operating firmware; asame 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 firmwareappears in the Download Mode display when selected

[3] Enable Downloads and Store Zipped – commands the DSE to accept download firmware, storing the newly downloaded code as the zipped and inactive Standby Firmuntil it is placed into service by the Switch to Standby Firmware Now command; appearin the Download Mode display when selected

[4] Enable Downloads, Unzip and Execute – commands the DSE to accept downloafirmware, immediately unzipping the newly downloaded code and placing it into operawhile storing the former operating code as zipped and inactive Standby Firmware; apin the Download Mode display when selected

[0] Return to SC 5520 Maintenance – dismisses the Firmware Download screen

Command selections 2, 3, and 4 are configuration options. The one you select is displayescreen as the Download Mode for the DSE, and the selection remains in effect until it is chaDownload Mode determines how the DSE responds to having firmware downloaded. Youperform the actual firmware download procedure by means of Trivial File Transfer Protoco(TFTP).

Unlike those three command selections, command selection 1 initiates an immediate respothe DSE. A description of that response appears following the directions for downloading.

Firmware download procedure using TFTP:

1. Open a second window in which to perform the TFTP functions. Keep the Firmware Dload 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.

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ded duct

s also a shelf ame

ED in a

ure isare asirm-d Ex-ce as

ing the d with

, DL)

4. Type

put "firmware filename" "address & product code"

and press the Enter key to initiate the actual transfer. The firmware filename is proviwith the firmware that is to be downloaded. The address portion of the address & procode is the slot/line/drop address when you are downloading to a single unit. There ia broadcast code that enables you to send new firmware to all the SC 5520 DSEs in (or pair of shelves) at once. The diagram below provides further definitions of the filenand address formats.

5. The Download Status line of the Firmware Download screen displays Active while thedownload takes place, then displays Calculating Checksum for approximately 40 sec-onds. When the calculation is complete, the status line displays either Checksum GOOD orChecksum BAD . When you perform a download to a single unit, the RSP indicator Lof that unit flashes during the download. When you perform a download to all unitsshelf, their RSP indicator LEDs remain Off.

6. If the selected Download Mode is Enable Downloads and Store Zipped, the procedcomplete once the checksum is calculated. The DSE stores the newly loaded firmwits standby firmware until you put it into service by means of the Switch to Standby Fware Now command. If the selected Download Mode is Enable Downloads, Unzip anecute, the DSE continues with the process of placing the new firmware into servidescribed below.

You can monitor the process as the DSE unzips and begins to execute firmware by observindicator LEDs on its front panel. The sequence is the same whether the activity occurs inresponse to a Switch to Standby Firmware Now command or as the last part of a downloaEnable 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, RLflash in sequence.

3. When the unzip process is complete, all LEDs light as the DSE performs a reset.

VMMmmbbv.ppp

2-digit major revision level

2-digit minor revision level

2-digit code correction level

3-digit product code – 030 for SC 5520

SSLLDD00.30

2-digit Shelf Slot # in hex - 01 – 20 (32 decimal)

2-digit Line # (default: 01)

2-digit Drop # (default: 00)

5-character product code – 00.30 for SC 5520

applbr00.30

Application Broadcast

5-character product code – 00.30 for SC 5520

Firmware Filename Format: Address and Product Code Format, Single Unit:

Address and Product Code Format, All SC 5520 Units in Shelf:

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3-20 Operation

n using

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 operatiothe newly activated firmware.

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4 Tests

OverviewYou should test the SC 5520 DSE when it is first installed to verify correct installation. Afteequipment is in service you may need to perform tests to diagnose any problems that occuoperation of the DSE or the data communications system.

There are five ways to initiate performance testing of the SC 5520 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

• commands from the Telco Serving Test Center (STC)

Test commands from an SNMP controller take priority over tests commanded in any otheYou can individually enable/disable front panel, EIA, and Telco test control in the DSE couration.

This chapter describes tests that can be initiated on the SC 5520 DSE from the terminal intthe front panel, the DTE, or the STC. Consult the appropriate SNMP controller documentfor information on the other forms of testing.

Figure 4-1, Fault Isolation Procedure, illustrates an approach you can follow for using the fropanel tests to identify the source of a problem.

Figure 4-1 Fault Isolation Procedure

Fault is in DTE, DTEinterface of the DSE,or DTE-to-DSE cable.

PassorFail

Start

Exit

Pass Fail

Yes

No

Perform Local Test withSelf Test on local DSE

Problem Exists?

Perform Local Teston local DSE, usingexternally generatedtest pattern.

Local DSE isdefective

Fault detected incommunication link

Pass FailPassorFail

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Terminal Interface Diagnostics ScreenThe terminal interface SC 5520 Diagnostics screen combines configuration and commandfunctions. Selections A through F are the command fields by which you can begin and enprocedures. The Test Results field below selection F displays the results of tests that emplTest. 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 tappear follow the illustration.

Figure 4-2 Diagnostics Screen

The procedure for performing tests from the Diagnostic screen involves the following step

1. Type the selection letter of the test you intend to perform and press the Enter key. Higing appears on the status field for the corresponding test, which displays "Idle" at this p

2. Use the arrow keys to toggle the highlighted field so that it displays "Active." The DSUgins the selected test.

3. To end the test, use the arrow keys again to toggle the highlighted field so that it agaplays "Idle" then press the Enter key. The DSE ends the test and the highlighting retuthe Select field. If the test employed Self Test, the screen displays the number of RX (if any) in the Test Results field.

4. To dismiss the screen, type selection 0, Return to Main Menu, and press the Enter key.

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.

SC 5520 Diagnostics Diagnostic Options [1] DTE: Line Loopback Control: Disable [2] Remote Loopback Control: Disable [3] Data Set Ready: Normal [4] Network: Line Loopback Test Pts: DTE Only [5] Telco Latching Loopbk Rsp: Enable [6] Remote Loop Receive: Enable [7] Remote Loop Auto Timeout: Disable [8] Remote Loop Initiation Seq.: V.54 [9] Self Test Pattern: 511

T E S T S: [A] Line Loopback: Idle [B] Line Loopback & Self Test: Idle [C] Remote Loopback: Idle [D] Remote Loopback & Self Test: Idle [E] Digital Loopback: Idle [F] Self Test: Idle Test Results:

[0] Return to Main Menu [S] Save [1] - [9] & Update Unit Select: [ ]

NOTE

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Local TestThe Local Test loopback condition isolates the DSE from the backplane data highway by necting the transmit logic circuits to the receive logic circuits. The loopback provides a patthrough the DSE for an externally generated test signal, as shown in Figure 4-3.

If the Termaloop Only option is disabled, the DSE also loops its backplane data highway tslot back to the LTU during Local Test. The default condition is Termaloop Only enabled (loopback to the backplane).

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 suand check a test signal.

• The device supplying the test signal is responsible for error detection and reporting.

• If Termaloop Only is disabled, receive data from the backplane is returned to the backplas transmit data so that tests performed from the remote DSU can check everythingcircuit except the DSE.

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 ato end the loopback.

• select [A] Line Loopback from the terminal interface Diagnostics screen

• 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.

• transmit commands from an SNMP controller to initiate and end the loopback.

Tests cannot be performed by means of front panel switches when the front panel has been inhibited by an SNMP controller or the terminal interface. 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.

NOTE

GDC 076R102-000, Issue 4

4-4 Tests

Figure 4-3 Local Test

RXLogic

INS ON

SD RD

RS CO

TMG RSP

TM ALM

ST

LT

RL

DL

5520

HELLODTEInter-face

BackplaneDriver

BackplaneReceiver

TXLogic

SC 5520 DSE

InterfacetoBackplaneDataHighways

1. To start test from front panel, press LTmomentary action switch. LT indicator is lit during the test.Press switch again to end the test.

3. Enter test data at the DTE. Compare dataentered at the DTE with data looped backand displayed by the DTE. (Test equipmentcan be used in place of the DTE.

2. TM indicator On while Local Testloopback is active.

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Local Test with Self-TestLocal Test with Self-Test checks the internal circuits of the local DSE, isolated from both tDTE and the backplane data channels. The test procedure involves two functions:

• Local Test — the DSE loops transmit data back as receive data. If Termaloop Only idisabled, the DSE returns receive data in its backplane time slot to the LTU as transdata.

• Self-Test — the DSE enables its internal Test Pattern Generator to provide the signathe Local Test loop and enables its Test Pattern Checker to verify the signal. The DSconfigurable to use a 511, 2047, or 15 bit test pattern. The DSE is isolated from its Dwhile the Test Pattern Generator and Checker are enabled.

The LT, ST, and TM indicators are On during the test. The Test Mode (TM) indicator remaOn as long as the test pattern is received without errors and blinks when an error is detec

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 swagain to end the test.

• select [B] Line Loopback & Self Test from the terminal interface Diagnosticsscreen

• transmit commands from an SNMP controller to initiate and end the test.

Figure 4-4 Local Test with Self-Test

RXLogic

INS ON

SD RD

RS CO

TMG RSP

TM ALM

ST

LT

RL

DL

5520

DTEInter-face

BackplaneDriver

BackplaneReceiver

TXLogic

SC 5520 DSE

InterfacetoBackplaneDataHighways

1. To start test from front panel, press LTand ST momentary action switches. LT and ST indicators are lit during the test.Press switches again to end the test.

2. TM indicator On during test. Blinksto indicate a detected error. Lit steadily

TPG

TPC

TPG – Test Pattern GeneratorTPC – Test Pattern Checker

while pattern is received correctly.

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the

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again

ack;

Remote LoopIn the Remote Loop test function the local DSE transmits an in-band command to its remotedirecting the remote to loop received signals back onto the network. The DSE is configurablesend (and accept) one of three remote loop commands: GDC proprietary, V.54, or PN 127remote DSU must be configured to accept the same command the DSE transmits.

The Remote Loop Timeout option determines whether or not the DSE ends this test automly. When the option is enabled the DSE ends the test after ten minutes. When the option iabled the DSE runs the test until it is terminated manually.

The remote loopback provides a path through the DSE, the network, and the remote DSUexternally generated test signal, as shown in Figure 4-5. Remote Loop checks the local DSE, aportion 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 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 te(BERT) connected to the DTE interface.

• The device supplying the test signal is responsible for error detection and reporting.

• The loopback remains in effect until the DSE transmits a loop down code for five secocommanding the remote unit to release the loopback. The DSE does this automaticallten 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 loopback; press the switch to end the loopback.

• select [C] Remote Loopback from the terminal interface Diagnostics screen

• assert a signal from the DTE on the RL lead of the DTE interface to initiate the loopbturn the signal Off to end the loopback.

• transmit commands from an SNMP controller to initiate and end the loopback.

The Remote Loop function is for use only on point to point links.

The Remote Loop function is only compatible with a remote NMS 520 DSU or a remote NMS 510 DSU when using the GDC remote loop command.


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.

NOTE

NOTE

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Figure 4-5 Remote Loop

INS ON

SD RD

RS CO

TMG RSP

TM ALM

ST

LT

RL

DL

5520

2. TM indicator On while Remote Loop is active.

1. To start test from front panel, pressRL momentary action switch. RL indicator is lit during the test.Press switches again to end the test.

DTE or TestDevice

3. Enter test data at theDTE. Compare dataentered at the DTEwith data looped backand displayed by theDTE. (Test equip-ment can be used inplace of the DTE.)

Remote DSU

DTE Interface

AnalogReceiver

TXDriver

TXLogic

RXLogic

TXLogic

RXLogic

DTEInterface

BackplaneDriver

BackplaneReceiver

SC 5520 DSE

BackplaneReceiver

BackplaneDriver

LTU

NetworkInterface

SC 5000 System

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Remote Loop with Self-TestRemote Loop with Self-Test, shown in Figure 4-6, isolates the local DSE from the DTE and checks the DSE internal circuits, the network link, and the remote DSU. The test proceduvolves two functions:

• Remote Loop — the local DSE transmits an in-band command to its remote DSU, direthe remote to loop received signals back onto the network. The DSE is configurable to(and accept) one of three remote loop commands: GDC proprietary, V.54, or PN 127remote DSU must be configured to accept the same command the DSE transmits.

• Self-Test — the DSE enables its internal Test Pattern Generator to provide the signthe Remote Loop and enables its Test Pattern Checker to verify the signal. The DSEconfigurable to use a 511, 2047, or 15 bit test pattern. The DSE is isolated from its Dwhile the Test Pattern Generator and Checker are enabled.

The Remote Loop Timeout option determines whether or not the DSE ends this test automly. When the option is enabled the test DSE ends the test after ten minutes. When the optdisabled 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 remOn as long as the test pattern is received without errors and blinks when an error is detec

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 swagain to end the test. Test ends automatically after ten minutes if Remote Loop Timeenabled.

• select [D] Remote Loopback & Self Test from the terminal interface Diagnosticsscreen

• transmit commands from an SNMP controller to initiate and end the test. Test ends automatically after ten minutes if Remote Loop Timeout is enabled.

The Remote Loop with Self-Test function is for use only on point to point links.

The Remote Loop with Self-Test function is only compatible with a remote NMS 520 DSU or a remote NMS 510 DSU when using the GDC remote loop command.


NOTE

NOTE

GDC 076R102-000, Issue 4

Tests 4-9

Figure 4-6 Remote Loop with Self-Test

INS ON

SD RD

RS CO

TMG RSP

TM ALM

ST

LT

RL

DL

5520

Remote DSU

DTE Interface

AnalogReceiver

TXDriver

TXLogic

RXLogic

TXLogic

RXLogic

DTEInterface

BackplaneDriver

BackplaneReceiver

SC 5520 DSE

BackplaneReceiver

BackplaneDriver

LTU

NetworkInterface

SC 5000 System

TPG TPC


1. To start test from front panel, press RL andwait approximately 4 seconds for remoteend to receive command, then press STswitch. RL and ST indicators are lit duringthe test. Press switches again to end thetest

2. TM indicator On during test. Blinks to indi-cate a detected error. Lit steadily while pat-tern is received correctly.

GDC 076R102-000, Issue 4

4-10 Tests

-th p-

in to

Data LoopThe Data Loop loopback condition, shown in Figure 4-7, isolates the DSE from the DTE by connecting the receive logic circuits to the transmit logic circuits. The loopback provides a pathrough the receive and transmit circuits of the DSE for a test signal from a remote site. Equiment at the remote site is responsible for generating and checking the test signal.

There are three ways to control the Data Loop function:

• briefly press the DL switch on the front panel to initiate the test; press the switch agaend the test.

• select [E] Digital Loopback from the terminal interface Diagnostics screen


Tests cannot be performed by means of front panel switches when the front panel has been inhibited by an SNMP controller or the terminal interface. Front panel enabled is the default condition. NOTE

GDC 076R102-000, Issue 4

Tests 4-11

Figure 4-7 Data Loop

INS ON

SD RD

RS CO

TMG RSP

TM ALM

ST

LT

RL

DL

5520

Remote DSU

DTE Interface

AnalogReceiver

TXDriver

TXLogic

RXLogic

TXLogic

RXLogic

DTEInterface

BackplaneDriver

BackplaneReceiver

SC 5520 DSE

BackplaneReceiver

BackplaneDriver

LTU

NetworkInterface

SC 5000 System

1. To start test from front panel, press DLmomentary action switch. DL indicatoris lit during the test. Press switch againto end the test.

2. TM indicator On while Digital Loopis active.

GDC 076R102-000, Issue 4

4-12 Tests

sent nsmit nal to

-latch-

s the ds the

Loop-

DSU Loopback Test (STC Controlled)The DSU Loopback test is a remotely controlled diagnostic, initiated by either of two codesfrom a Serving Test Center (STC). During the test the DSE connects its receive logic and tralogic circuits to loop received signals back onto the backplane. The STC transmits a test sigthe DSE and then checks it for errors after it has returned through the loopback. Figure 4-8 illus-trates the DSU Loopback.

The two codes by which the STC can command the test are classified as latching and noning:

• The latching loopback code commands the unit to initiate the test condition, which itremains in until the STC sends a terminating code to end the test.

• The non-latching loopback code commands the unit into the test condition as long acode is being received; when the STC stops sending the non-latching code the unit enDSU Loopback.

When it is necessary to isolate a problem, contact the STC and ask them to initiate the DSUback test. The test results should be used in conjunction with the fault isolation sequence (Figure 4-1) to pinpoint a problem, if any.

The Telco Latching Loop option, configurable in the DSE from an SNMP controller, can be set to Disable, which causes the unit to disregard the latching loopback code. The default setting of the option is Enable. When the option is set to Disable, the STC can still command a non-latching DSU Loopback.

NOTE

GDC 076R102-000, Issue 4

Tests 4-13

Figure 4-8 DSU Loopback Test

INS ON

SD RD

RS CO

TMG RSP

TM ALM

ST

LT

RL

DL

5520

STC

TXLogic

RXLogic

DTEInterface

BackplaneDriver

BackplaneReceiver

SC 5520 DSE

BackplaneReceiver

BackplaneDriver

LTU

NetworkInterface

SC 5000 System

2. TM indicator lights

1. Contact the STC and askthem to initiate the DSULoopback test.

3. Coordinate with the STC to end the test. Usetest results in conjunction with Figure 4-1 toidentify any problems that are detected.

GDC 076R102-000, Issue 4

4-14 Tests

rom a river to STC.

it for lso be

CSU Loopback Test (STC Controlled)The CSU Loopback test is a remotely controlled diagnostic, initiated by a CSU code sent fServing Test Center (STC). During the test the DSE connects its backplane receiver and dloop received signals back onto the backplane so that the LTU transmits them back to theAt the same time, the DSE connects its transmit logic and receive logic circuits so that data loops back toward the DTE interface.

While the loopback is in effect the STC transmits a test signal to the DSE and then checkserrors after it has returned through the loopback and over the network. A test signal can adirected through the DTE interface and checked for errors at the local site. Figure 4-9 illustrates the CSU Loopback.

When it is necessary to isolate a problem, contact the STC and ask them to initiate the CSU Loop-back test. The test results should be used in conjunction with the fault isolation sequence (Figure 4-1) to pinpoint a problem, if any.

GDC 076R102-000, Issue 4

Tests 4-15

Figure 4-9 CSU Loopback Test

INS ON

SD RD

RS CO

TMG RSP

TM ALM

ST

LT

RL

DL

5520

STC

TXLogic

RXLogic

DTEInterface

BackplaneDriver

BackplaneReceiver

SC 5520 DSE

BackplaneReceiver

BackplaneDriver

LTU

NetworkInterface

SC 5000 System

2. TM indicator lights

1. Contact the STC and askthem to initiate the CSULoopback test.

4. Coordinate with the STC to end the test. Usetest results in conjunction with Figure 4-1 toidentify any problems that are detected.

DTE or TestDevice

3. While the CSU loopback isin effect you can enter testdata at the DTE. Comparedata entered at the DTEwith data looped back anddisplayed by the DTE.(Test equipment can beused in place of the DTE.)

GDC 076R102-000, Issue 4

4-16 Tests

20 DSE. e Self

in to

r site. E. Or, to the

e far

Self Test ProcedureThe Self Test generates and transmits a test pattern on the channel supported by the SC 55It performs error checking on the pattern it receives back. There are three ways to control thTest function:

• briefly press the ST switch on the front panel to initiate the test; press the switch agaend the test.

• select [F] Self Test from the terminal interface Diagnostics screen


The function can be used for either of two tests, both of which require cooperation at anotheThe remote site can be requested to loop the signal back for error checking by the local DSif compatible equipment is available, the remote site can generate a matching pattern backDSE for end-to-end test checking at both sites.

The remote unit for this test can be located at the service provider switching office or at thend of the link.

Tests cannot be performed by means of front panel switches when the front panel has been inhibited by an SNMP controller or the terminal interface. Front panel enabled is the default condition. NOTE

GDC 076R102-000, Issue 4

Tests 4-17

Figure 4-10 Self Test

INS ON

SD RD

RS CO

TMG RSP

TM ALM

ST

LT

RL

DL

5520

TXLogic

RXLogic

DTEInterface

BackplaneDriver

BackplaneReceiver

SC 5520 DSE

BackplaneReceiver

BackplaneDriver

LTU

NetworkInterface

SC 5000 System

TPG TPC


1. To start test from front panel, press ST switch. ST indicator is lit during the test. Press switch again to end the test.

2. TM indicator On during test. Blinks to indicate a detected error. Lit steadily while pattern is received correctly.

Remote Unit

Responsible to either loop back the signal or supply pattern generation and checking for end-to-end test.

The remote unit can be located at service provider switching office or at far end of the link.

GDC 076R102-000, Issue 4

A Technical Characteristics


Item Specification

Physical

PC card (rackmount installation)

Height (SC 5520 card only) 0.81 in. (21 mm)

(With DRA or 530 Card) 1.75 in. (45 mm)

Width 7 in. (178 mm)

Depth 9.5 in. (241 mm)

Weight (SC 5520 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 5520 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)

GDC 076R102-000, Issue 4

A-2 Technical Characteristics

Item Specification

Operation

DDS, DDS/SC — 2.4 to 56 Kbps Point-to-point or Multipoint

64 Kbps clear channel Point-to-point

Signal format Serial, synchronous, or asynchro-nous

Asynchronous character format 8-11 bits/character

Overspeed 1 or 2.3%

Data rate, synchronous 2400, 4800, 9600,19200, 56000, or 64000 bps

Data rate, asynchronous 600, 1200, 1800, 2400, 4800, 9600, or 19,200 bps

DTE interface EIA/TIA-232-E, ITU-T V.35, or optional EIA-530

Transmit Timing Shelf (Receive), internal (DSE) ±0.01%, or external (DTE) (can accept external clock up to ±0.02%)

GDC 076R102-000, Issue 4

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B DTE Interface Signals

Table B-1 EIA/TIA-232-E DTE Interface Signals


PinCircuit

Designation

No. ITU-T EIA Description

1 101 AA This circuit is connected to the equipment frame. Optionally, it may be conneed to signal ground, pin 7.

2 103 BA Transfers data signals from DTE for transmission over communications line.

3 104 BB Transfers data signals to DTE that were received over communications line Data Set.

4 105/133

CA/CJ(1)

Indicates to Data Set that DTE is prepared to transmit and is ready for receivin

5 106 CB Indicates to DTE that Data Set is prepared to transmit.

6 107 CC Indicates to DTE that Data Set is prepared for data communications.

7 102 AB Establishes common ground reference for all interface circuits except protectiground, pin 1.

8 109 CF Indicates to DTE that Data Set is receiving data (not receiving idle or OOS codes).

9 — — (Reserved for testing)

10 — — (Reserved for testing)

11 126 (4) Unassigned

12 122/112

SCF/CI(2)

Secondary Received Line Signal

13 121 SCB Secondary Clear to Send

14 118 SBA Secondary Transmitted Data

15 114 DB Transfers transmitter signal timing information from Data Set to DTE.

16 119 SBB Secondary Received Data

17 115 DD Transfers receiver signal timing information from Data Set to DTE.

18 141 LL Local Loopback

19 120 SCA Secondary Request to Send

20 108/1,/2

CD Indicates to Data Set that DTE is prepared for data communications.

21 140/110

RL/CG Remote Loopback/Signal Quality

GDC 076R102-000, Issue 4

B-2 DTE Interface Signals

is not

an-

Table B-1 EIA/TIA-232-E DTE Interface Signals (Continued)

PinCircuit

Designation

No. ITU-T EIA Description

22 125 CE Ring Indicator

23 111/112 CH/CI(2)

Data Signal Rate Selector

24 113 DA Transfers transmitter signal timing information from DTE to Data Set

25 142 TM Indicates to DTE that Data Set is in a test mode.

26 (3) No Connection

1. When hardware flow control is required, Circuit CA may take on the functionality of Circuit CJ. 2. For designs that use interchange circuit SCF, interchange circuits CH and CI are assigned to pin 23. If SCF

used, CI is assigned to pin 12. 3. Pin 26 is contained on the Alt A connector only. No connection is to be made to this pin. 4. Pin 11 is unassigned. It will not be assigned in future versions of EIA/TIA-232. However, in international st

dard ISO 2110, this pin is assigned to ITU-T Circuit 126, Select Transmit Frequency.

GDC 076R102-000, Issue 4

DTE Interface Signals B-3

y

c-

.

Table B-2 ITU-T V.35 DTE Interface Signals

V.35Circuit

Designation

Pin ITU-T EIA Description

A 101 AA This circuit is connected to the equipment frame. Normally, it is separated fromsignal ground (pin B) by 100 ohms, but it may be connected to signal ground bmeans of an option strap (X1).

B 102 AB Establishes a common ground reference for all interface circuits except protetive 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.

PS

103103

BA(A)BA(B)

Transfers data signals from DTE for transmission over communication line.

RT

104104

BB(A)BB(B)

Transfers data signals received over communication line by Data Set to DTE

UW

113113

DA(A)DA(B)

Transfers transmitter signal timing information from DTE to Data Set.

VX

115115

DD(A)DD(B)

Transfers receiver signal timing information from Data Set to DTE.

YAA/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.

GDC 076R102-000, Issue 4

B-4 DTE Interface Signals

Table B-3 EIA-530 DTE Interface Signals

P1 PinEIA Circuit Designation Description

1 — Allows shield connections via pin number 1.

214

BA(A)BA(B)

Transfers data signals from DTE for transmission over communication line.

316

BB(A)BB(B)

Transfers data signals received over communications line by Data Set to DTE.

419

CA(A)CA(B)

Indicates to Data Set that DTE is prepared to transmit.

513

CB(A)CB(B)

Indicates to DTE that Data Set is prepared to transmit.

622

CC(A)CC(B)

Indicates to DTE that Data Set is operational.

2023

CD(A)CD(B)

Indicates to Data Set that DTE is prepared for data communications.

7 AB Establishes common ground reference for all interface circuits except protective ground.

810

CF(A)CF(B)

Indicates to DTE that Data Set is receiving data (not idle or OOS codes).

1512

DB(A)DB(B)

Transfers transmitter signal timing information from Data Set to DTE.

179

DD(A)DD(B)

Transfers receiver signal timing information from Data Set to DTE.

2411

DA(A)DA(B)

Transfers transmitter signal timing information from DTE to Data Set.

25 TM Indicates whether the local DCE is in a test condition.

GDC 076R102-000, Issue 4

NMP ps of

-

C SC 5520 MIB Support

OverviewThis appendix details the Management Information Base (MIB) table objects by which an Scontroller can command and monitor the SC 5520 DSE. The DSE makes use of six grouMIB tables developed by GDC:

• GDC Common MIB

• DDS MIB

• SC 5520 MIB

• SC 5000 MIB

• NMS 520 MIB

• NMS 510 MIB

GDC Common MIB TablesTable C-1 Trap Table (GDC Common MIB)


MIB Object Syntax Access Enumeration Description

cmnTrapGlobal Integer read-write disable(1)enable(2)

This globally enables and disables all TRAPs from an agent. All variables should provide a means to mask a TRAP and to provide some threshold before a TRAP is sent.

cmnTrapAddr Number

Integer read-only The maximum number of entries the TRAP table can hold.

cmnTrapAddr Table

Sequence of CmnTrapAddr Entry

not-accessible A table of management systems ready to accept traps generated by this node.

To add an entry to the table, a set on the Community name for the instance (IP Ad-dress and UDP PORT) needs to be per-formed. To delete an entry, a set on the Status to invalid on the instance needs to beperformed.

cmnTrapAddr Entry

CmnTrapAddr Entry

not-accessible Information needed to deliver traps to a particular management station. Consists of cmnTrapAddrIpDest and cmnTrap Ad-drUdpDest.

cmnTrap AddrIpDest

IpAddress read-only The IP address of the management agent receiving traps. The IP address 0.0.0.0 is not allowed.

GDC 076R102-000, Issue 4

C-2 SC 5520 MIB Support

Table C-1 Trap Table (GDC Common MIB) (Continued)

Table C-2 Community Name Table (GDC Common MIB)


cmnTrapAddr UdpDest

Integer read-only The UDP port number used by the manage-ment station to receive traps. A value of 0 is not allowed for the UDP port number.

cmnTrapAddr Community

DisplayString (SIZE (1..32))

read-write The community name expected by the management station receiving traps.

cmnTrapAddr Status

Integer read-write valid(1)invalid(2)

The status of the entry. Valid(1) is always returned if the entry exists when a read is performed.

Invalid entries are removed from the table.


cmnCommunity Number

Integer read-only The maximum number of entries the Com-munity table can hold.

cmn Community Ta-ble

Sequence of Cmn Commu-nity Entry

not-accessible A table of Community Names and their de-fined access.

To add an entry to the table, perform a set on the Community Name for the instance (Index). To delete an entry, set the Status of the instance to Invalid.

cmn Community Entry

Cmn Commu-nity Entry

not-accessible Information needed to deliver traps to a particular management station.

cmn Community Index

Integer read-only The index number associated with the entry in the community name table.

cmn Community Name

DisplayString (SIZE (1..32))

read-write The community name being defined.

cmn Community Access

Integer read-write readOnly(1)readWrite(2)noAccess(3)

The Access associated with the community name. When a new row is created by add-ing a new name, the default value is noAc-cess(3).

cmn Community Status

Integer read-write valid(1)invalid(2)

The status of the entry. Valid(1) is always returned if the entry exists when a read is performed.

Invalid entries are removed from the table.

GDC 076R102-000, Issue 4

SC 5520 MIB Support C-3

Table C-3 Alarm Status Table (GDC Common MIB)

The entire cmnCommName group can only be accessed by the super user community name that has readWrite privileges. A getRequest to this table from any other community name returns a noSuchName error. A getNextRequest with readOnly privilege jumps around the group.

As a factory default, there is one entry in the table with the following values:

cmnCommunityIndex1cmnCommunityNamepubliccmnCommunityAccessreadonly(1)cmnCommunityStatusvalid(1)

Adding the next entry requires write privileges.


cmnAlarm StatusTable

Sequence of CmnAlarmSta-tusEntry

not-accessible The cmnAlarmStatusTable contains entries that report the status of alarms. The status of an alarm indicates whether the alarm is currently active or inactive. This informa-tion is determined by the network element depending on the alarm threshold configu-ration.

The structure of the table is such that alarm status is supported on a unit or interface ba-sis, and then on an alarm type basis within the interface. For simplicity's sake, and to support the reporting of status of all alarms, a unit is treated as an interface in this table.

cmnAlarm StatusEntry

CmnAlarm Sta-tusEntry

not-accessible An entry in the Alarm Status table.

cmnAlarm StatusIndex

Integer read-only The index value that uniquely identifies the interface to which this entry applies.

cmnAlarm StatusIdentifier

Object Identifi-er

read-only The unique alarm identifier assigned to this alarm type. The format of this identifier is an Object Identifier that has the following format: {iso(1) org(3) dod(6) internet(1) private(4) enterprises(1) gdc(498) xxx(x) alarm(z) yyy(y) — where xxx(x) is the ad-ministratively assigned family object iden-tifier; (z) is the object identifier for alarms in the family defined MIB; and yyy(y) is the administratively assigned alarm type identifier for this alarm.

cmnAlarm CurrentStatus

Integer read-only inactive(1)active(2)

The current status of the alarm. The value inactive(1) indicates that this alarm is cur-rently inactive. The value active(2) indi-cates that this alarm is currently active.

NOTE

GDC 076R102-000, Issue 4


Table C-4 Alarm Masking Table (GDC Common MIB)

Table C-5 Alarm Management Related Trap Table (GDC Common MIB)


cmnAlarm MaskTable

Sequence of CmnAlarm MaskEntry

not-accessible The cmnAlarmMaskTable contains entries that report the current masking state of alarms. The mask of an alarm can be changed between masked(1) and un-masked(2). If an alarm is unmasked, the threshold configuration can affect the re-porting of this alarm.

The structure of the table is such that alarm mask is supported on a unit or interface ba-sis, and then on an alarm type basis within the interface. For simplicity's sake and to support the reporting of status of all alarms, a unit is treated as an interface in this table.

cmnAlarm MaskEntry

CmnAlarm MaskEntry

not-accessible An entry in the alarm mask table.

cmnAlarm MaskIndex

Integer read-only The index value that uniquely identifies the interface to which this entry applies.

cmnAlarm MaskIdentifier

Object Identifi-er

read-only The unique alarm identifier assigned to this alarm type. The format of this identifier is an Object Identifier that has the following format: {iso(1) org(3) dod(6) internet(1) private(4) enterprises(1) gdc(498) xxx(x) alarm(z) yyy(y) — where xxx(x) is the ad-ministratively assigned family object iden-tifier; (z) is the object identifier for alarms in the family defined MIB; and yyy(y) is the administratively assigned alarm type identifier for this alarm.

cmnAlarm Mask

Integer read-write mask(1)unmask(2)

The alarm masking control. When the val-ue is mask(1) the alarm is masked and not reported. When the value is unmask(2) the alarm is reported depending on the thresh-old configuration.

Trap Name Variables Description

cmnAlarm StatusTrap

cmnAlarm CurrentStatus The alarm status trap. This trap is set whenever an alarm status change occurs to report an alarm. The variable bindings con-tain the status for each alarm that changes state. Note that the Object Identifier of the variable contains the interface, family type, and alarm type of the alarm encoded with-in.

More than one alarm can be sent in the trap if the network element indicates that more than one has changed at the same time.

GDC 076R102-000, Issue 4


GDC DDS MIB TablesTable C-6 DDS Line Configuration Table (GDC DDS MIB)

(* = Default Setting; ** = Not Applicable)



ddsLineType Integer (1 - 4) read/write dds1(1)* -- Standard DDS line

ddsSc(2) -- DDS/SC line

clearChan-nel(3) -- 64K Clear Channel line

auto(4)** -- au-tomatic mode determination

Identifies the type of line. The value dds1(1) defines the line type as a conven-tional DDS. The value ddsSc(2) defines the line type as a DDS line with secondary channel. The value clearChannel(3) indi-cates that the line type is 64K Clear Chan-nel.

The value auto(4) is not a valid selection for the SC 5520 DSE. The DSE requires manual Line Type selection, using one of the first three values.

ddsDataRate Integer (1 - 12) read/write async2400(1)sync2400(2)async4800(3)sync4800(4)async9600(5)sync9600(6)async19200(7)sync19200(8)sync56000(9)*sync64000(10)au-toAsync(11)**autoSync(12)**

The DSU data rate option. This object is used to choose the operational data rate of the DSU.

Similarities in DDS line coding of 56k DDS/SC and 64k Clear Channel require the user to select sync64000(10) implicitly if 64kbps data rate is required.

Interpretation (values 1- 9 apply to both Standard DDS and DDS/SC):

async2400(1)2400 bps Asynchronous sync2400(2)2400 bps Synchronous async4800(3)4800 bps Asynchronoussync4800(4)4800 bps Synchronousasync9600(5)9600 bps Asynchronoussync9600(6)9600 bps Synchronousasync19200(7)19200 bps Asynchronoussync19200(8)19200 bps Synchronous

GDC 076R102-000, Issue 4


Table C-6 DDS Line Configuration Table (GDC DDS MIB) (Continued)(* = Default Setting; ** = Not Applicable)


ddsTxClock Source

Integer (1 - 3) read/write receive(1)*internal(2)external(3)

The DSU transmit clock source option. This is the selection for the transmitter tim-ing clock source. If connecting to a DDS circuit, receive(1) must be selected.

receive(1)Receive Clock, derived from the Line

internal(2)Internal Clock, generated in the Data Set

external(3)External Clock, from the DTE

ddsZero EncodingCfg

Integer (1 - 2) read/write enable(1)*

disable(2)

The DSU zero encoding option for point to point 56k DDS secondary channel circuits (does not apply for any other data rates or line types). Allows the DTE equipment to transmit all '0' octets without violating DDS ones density requirements. Both the local and remote DSU must be set to the same value.

This is a GDC-only feature, so it must be disabled when the DSU communicates with equipment from other providers.

ddsDefault Config

Integer (1 - 2) read/write noChange(1)*

defaultCfg(2)

The DSU default config option. When the value defaultCfg(2), is selected, the memo-ry of the dataset is erased, and the DSU configuration is returned to factory de-faults.

GDC 076R102-000, Issue 4


Table C-7 DDS DTE Port Configuration Table (GDC DDS MIB)(* = Default Setting; ** = Not Applicable)



ddsDteExtBuff Clk

Integer (1 - 2) read/write internal(1)*external(2)

The DSU transmit buffer option. When ex-ternal(2) is selected an optional elastic transmit buffer is inserted into the data path . This elastic buffer maintains network synchronization when an external frequen-cy locked clock source is driven into the ex-ternal transmit clock input on the DTE interface. The buffer compensates for dif-ferences in phase and frequency relation-ships between the external transmit clock and the network clock. When this object is internal(1) no buffering is performed . This object must be set to external(2) if the transmitter timing is set to external.

ddsDteCfgTx Carrier

Integer (1 - 2) read/write constant(1)*switched(2)

The Transmit Carrier option. This feature allows the DTE to control the transmitter carrier directly, by means of the RTS cir-cuit. Transmit Carrier is typically set to switched(2) in remote DSU multidrop ap-plications. Transmit Carrier constant(1) is used in point-to-point and multipoint mas-ter applications. RTS and CTS are forced on internally when this object is constant (1).

When the value of ddsDataRate is sync64000 (10), the value of this object must be set to constant (1).

ddsDteCfgRx Carrier

Integer (1 - 2) read/write constant(1)*switched(2)

The Receive Carrier option. This option controls the operation of DCD. Set it to constant(1) to force DCD On for multipoint remote and point-to-point applications. Use switched(2) for multipoint master con-figurations.

When the value of ddsDataRate is sync64000 (10), the value of this object must be set to constant (1).

ddsDteCfgCts Delay

Integer (1 - 6) read/write NA** The CTS delay option. This option is not applicable in the SC 5520 DSE.

ddsDteCfg LocalDSR

Integer (1 - 2) read/write follows DTR(1)forcedOn(2)*

The DSR option. This option controls op-eration of the Data Set Ready signal output from the DSU. DSR is normally On when forcedOn(2) is selected. When follows-DTR(1) is selected, DSR is On only when DTR is On.

GDC 076R102-000, Issue 4


Table C-7 DDS DTE Port Configuration Table (GDC DDS MIB) (Continued)(* = Default Setting; ** = Not Applicable)


ddsDteCfg AnaloopDSR

Integer (1 - 2) read/write off(1)normal(2)*

The DSR in Line Loopback (Analoop) op-tion. This option controls DSR during a Line Loopback test. When this option is off(1) and Line Loopback is active, a DSR off indication is output to the DTE inter-face. When this option is normal(2), the state of DSR responds in accordance with the ddsDteCfgLocalDSR object.

ddsDteCfgAas Status

Integer (1 - 2) read/write disable(1)**enable(2)**

Auto-anti Streaming option. This option is not applicable in the SC 5520 DSE. The DSE returns an error if an attempt is made to perform a Set on this object.

ddsDteCfgAas Timer

Integer (1 - 4) read/write sec5(1)**sec10(2)**sec30(3)**sec45(4)**

Auto Anti-Streaming Timer option. This option is not applicable in the SC 5520 DSE. The DSE returns an error if an at-tempt is made to perform a Set on this ob-ject.

ddsDteCfg Circuit Assurance

Integer (1 - 2) read/write disable(1)*enable(2)

The Circuit Assurance option. When this option is set to enable(2) the DSU clamps CTS upon receiving any of the following Network codes:

1. IDLE(no DCD)2. Out of Service Code (OOS) 3. Abnormal Station Code (ASC)

No action occurs for any of the above net-work conditions when the value of this ob-ject is disable(1).

ddsDteCfg SystemStatus

Integer (1 - 2) read/write disable(1)*enable(2)

The System Status option. When this op-tion is set to enable(2) the DSU clamps DSR upon receiving the following Net-work codes:

1. Out of Service Code (OOS) 2. Abnormal Station Code (ASC)

No action occurs for any of the above net-work conditions when the value of this ob-ject is disable(1).

ddsDteCfg Termaloop

Integer (1 - 2) read/write enable(1)*disable(2)

Loopback Termination Mode option, also called Termaloop Only. When the value of this object is enable(1) the DSU does not loop the DDS network interface while a lo-cal loopback is in progress. When the value of this object is disable (2) the DSU loops the DDS network service back to the ser-vice provider during a local loopback test.

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Table C-8 DDS Async DTE Port Configuration Table (GDC DDS MIB)(* = Default Setting)


ddsDteAsync RateAdapt

Integer (1 - 4) read/write none(1)*

halfLine Rate(2)s

quarterLine Rate(3)

from1800to2400 LineRate(4)

The Async rate adaption object. This ob-ject defines the speed relationship between the DDS circuit and the DTE interface when the DSE is configured for async com-munication. The value none(1) maintains a one-to-one speed relationship. The value halfLineRate(2) means that the DTE speed is one half the DDS circuit rate. The value quarterLine Rate(3) means that the DTE speed is one fourth the DDS circuit rate.

The value from1800to2400LineRate(4) is a special case. If the required DTE speed is from 1800 to 2400 bps, inclusive, then the DDS circuit must be provisioned as 2400 DDS or DDS with secondary channel, and the value of this object must be (4).

ddsDteAsync Rx Delay

short(1)*long(2)

The EOT Buffer object. When long(2) is selected, the DSU inserts a 40-bit buffer in the receive data path to filter out EOT. The buffer is required when ddsDteAsync TxEOTcfg and ddsDte AsyncRxEOTcfg are enabled. The value short(1) may only be used when the EOT signal scheme is not in use.

ddsDteAsync TxEOTcfg

Integer (1 - 2) read/write enable(1)disable(2)*

The Transmit End-of-Text object. The val-ue enable(1) commands the DSU to insert and transmit End-of-Text (EOT) at the end of each transmission. The value disable(2) inhibits EOT transmission.

ddsDteAsync RxEOTcfg

Integer (1 - 2) read/write enable(1)disable(2)*

The Receive End-of-Text object. The val-ue enable(1) commands the DSU to expect End-of-Text (EOT) and remove it from the data stream when it is received. The value disable(2) commands the DSU not to mon-itor the data stream for EOT.

ddsDteAsync OverSpeed

Integer (1 - 2) read/write overSpeed1(1)*

overSpeed2 point3(2)

This option determines the amount of asyn-chronous overspeed the DSU can tolerate. The value overSpeed1(1) commands the DSU to accept incoming async data that is up to 1% faster than the configured data rate. The value overSpeed2point3(2) com-mands the DSU to allow DTE overspeed of up to 2.3%.

ddsDteAsync CharacterSize

Integer (1 - 4) read/write bits11(1)*bits10(2)bits9(3)bits8(4)

This option selects the Asynchronous char-acter size, in bits/character, including start and stop bits.

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Table C-9 DDS DTE Status Table (GDC DDS MIB)(** = Not Applicable)

MIB Object Syntax Access Description

ddsDteStatus Display string read-only Returns four binary octets that serve as a snapshot of front panel EIA indicators and other conditions in the DSU.

Octet 1 bit 7 - not usedbit 6 - CTS(1:On; 0:Off)bit 5 - RTS(1:On; 0:Off)bit 4 - DTR (1:On; 0:Off)bit 3 - DSR(1:On; 0:Off)bit 2 - NS**(1:On; 0:Off)bit 1 - DCD(1:On; 0:Off)bit 0 - DTP(1:On; 0:Off)

Octet 2 bit 7 - not usedbit 6 - DSP(1:On; 0:Off)bit 5 - DCD(1:Transitions 0:Off)bit 4 - RTS(1:Transitions 0:Off)bit 3 - CTS(1:Transitions 0:Off)bit 2 - RXD(1:Transitions 0:Off)

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SC 5520 MIB TablesTable C-10 SC5520 Unit Configuration Table (GDC SC5520 MIB)

(* = Default Setting; ** = Not Applicable, NMS 510; *** = Not Applicable, NMS 510 and NMS 520)



Nms510 Compatability Mode

Integer (1 - 2) read/write disabled(1)*enabled(2)

The NMS 510 compatibility mode object. When this object is set to the value en-abled(2) the SC 5520 DSE can be used in conjunction with an NMS 510 DSU. When this object is set to disabled(1) the DSE is compatible with the NMS 520 DSU .

PtToPtSentry Time**

Integer (0..127) read/write (60 minutes default)

The Point to point sentry time object. The value of this object controls how long a re-mote unit in a point to point application waits between sending unsolicited alarm responses when there are no alarm condi-tions to report. The unsolicited responses, which are intrusive to data, maintain the management link between the two units. The range of wait times is from 1 to 127 minutes, with a default of 60. The 0 (zero) minutes value disables remote alarm sentry reporting.

MtpointRm RspIntrvl**

Integer (0..127) read/write (10 seconds default)

The Multipoint remote response object. The value of this object controls how long a remote unit in a multipoint application waits between sending unsolicited alarm responses when there are no alarm condi-tions to report. The unsolicited responses, which are non-intrusive to data, maintain the management link between the two units. The range of wait times is from 1 to 127 seconds, with a default of 10. The 0 (zero) seconds value disables remote alarm sentry reporting. All remotes in a multi-point application must be set the same.

DtePortType Integer (1 - 3) read/write rs232(1)v35(2)auto(3)*

The DTE Port Type object. The value rs232(1) forces the DTE port to operate as an EIA/TIA-232-E interface. The value v35(2) forces the DTE port to operate as a V.35 interface. The value auto(3) specifies that the DTE port interface type is to be de-tected and set automatically.

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Table C-10 SC5520 Unit Configuration Table (GDC SC5520 MIB) (Continued)(* = Default Setting; ** = Not Applicable, NMS 510; *** = Not Applicable, NMS 510 and NMS 520)



DteCtsDelay Integer (1 - 3) read/write ctsOn(1)*cts0mSec(2)ctsFixed3Char(3)

The RTS/CTS Delay object. The value of this object specifies how long the DSE de-lays after RTS from the DTE goes On be-fore it turns CTS On. ctsOn(1)Forces both RTS and CTS On

(transmitter On) regard-less of the state of RTS. MIB object sc5520DteCts DelayExt is ignored.

cts0mSec(2)Provides a zero bit-time delay. This delay can be extend-ed by the value of MIB object sc5520Dte CtsDe-layExt.

ctsFix3Char(3)Provides a delay equal in duration to three charac-ters. This delay can be ex-tended by the value of MIB object

DteCtsDelay Ext

Integer (1 - 4) read/write ext0mSec(1)*ext30mSec(2)ext60mSec(3)ext90mSec(4)

RTS/CTS Delay extension object. The de-lay-time extension set by this object is add-ed to the delay time (0mSec or Fixed 3 Char) set by the DteCtsDelay object. This object is ignored when DteCtsDelay is set to ctsOn(1).

BkPlaneFrac Num

Integer (1 - 32) read/write (1)* = DS01(2) = DS02(3) = DS03

•••

(32) = DS032

This object selects the time slot (DS0) the DSE uses on the selected backplane data highway. The DSE uses the time slot to ex-change data with the LTU that connects it to the DDS network. Although there are 32 time slots in each of the four backplane data highways, T1 applications are restricted to time slots 1 — 24. The BkPlaneFracIfInd-ex object selects which of the four data highways the DSE uses.

BkPlaneFracIf Index

Integer (1 - 5) read/write none(1)*highway1(2)highway2(3)highway3(4)highway4(5)

This object selects which backplane data highway the DSE uses. The data highway is the hardware channel (pair) the DSE uses to exchange transmit and receive data with the LTU that connects it to the DDS net-work. There are four data highways on the backplane. The default is none(1), which specifies that no data be directed to any of the data highways. The BkPlaneFracNum object selects the time slot the DSE uses on the designated data highway.

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sc5520 FirmwareLevel

Display string read-only This object displays the version identifier of the DSE firmware.

FrontPanel Inhibit

Integer (1 - 3) read/write fpInhibited(1) -- Read only

fpEnabled(2)* -- Read only

execute(3) -- Write only

This object can be used to inhibit operation of the DSE front panel test switches. If a test switch is activated while inhibited, it is ignored.

The values fpInhibited(1) and fpEnabled(2) display the current status of the front panel. To change the status from Enabled to Inhib-ited, perform a SET on this object using the value execute(3). The SET has no effect if the front panel is already inhibited.

The sc5520FrontPanelEnable object is used to change front panel status from In-hibited to Enabled.

FrontPanel Enable




This object can be used to enable operation of the DSE front panel test switches.

The values fpInhibited(1) and fpEnabled(2) display the current status of the front panel. To change the status from Inhibited to En-abled, perform a SET on this object using the value execute(3). The SET has no ef-fect if the front panel is already enabled.

The sc5520FrontPanelInhibit object is used to change front panel status from Enabled to Inhibited.

RemLoop Allowed***

Integer (1 - 2) read/write enable(1)*inhibit(2)

This object inhibits or enables capability of the SC 5520 DSE to send a remote loop command to the far end and to go into re-mote loop when requested to do so by the far end.

RemLoop Pattern***

Integer (1 - 2) read/write patternV54(1)*patternPn127(2)

This object selects the code that the SC 5520 DSE sends to the far end and accepts from the far end as a command to go into a remote loop test.

RemLoop Timeout***

Integer (1 - 2) read/write inhibit(1)*enable(2)

This object inhibits or enables a 10 minute remote loop test timer. When it is enabled, a remote loop test terminates automatically 10 minutes after it is initiated. When the timer is inhibited, a unit remains in a re-mote loop test indefinitely.

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HdlcInvert Integer (1 - 2) read/write normal(1)*invert(2)

Primary data invert option. Can be used to enhance the quality of data when network does not provide B8Z5. Primarily used with DDS II 56k.

EIARemLoop Integer (1 - 2) read/write disable(1)*enable(2)

The Remote Loop (RL) EIA test control lead option. This option either allows or blocks EIA initiated test inputs from the DTE interface. The remote unit must sup-port v.54 or PN127 remote loop.

EIALineLoop Integer (1 - 2) read/write disable(1)*enable(2)

The LT EIA test control lead option. This option either allows or blocks EIA initiated test inputs from the DTE interface. LT (or Analoop) can be either a bilateral or unilat-eral loopback depending on option dds DTE Termaloop.

PiggyBack Detect

Integer (1 - 2) read-only not-installed(1)installed(2)

Set to 2 when either a Data Rate Adapter or 530 card is installed on the DSE.

RateBroadcast Integer (1 - 2) read/write normal(1)* -- Read-Only

enable(2) -- Write-Only

This should only be enabled when adding a remote unit and the Line Type is either DDSII with data rate equal to 56k or 64k Clear Channel.

CircuitType Integer (1 - 2) read/write point-to-point(1)multipoint(2)

This object defines the circuit type.

WakeUp Remote

DisplayString (SIZE (16))

read-only This object is requested to initiate the add remote process in a point to point circuit. The serial number of the associated remote is returned.

ListOfRemotes Octet String (SIZE(4))

read-only A bitwise snapshot of the elements associat-ed with this circuit,the master is always drop zero, the remote in a point to point cir-cuit is always drop one.

bit values: 0 = no element, 1 = element present

1st octet2nd octet3rd octet4th octetbit/drop bit/dropbit/dropbit/drop

0 / 0 0 / 80 / 160 / 24

1 / 1 1 / 91 / 171 / 25

2 / 2 2 / 102 / 182 / 26

3 / 3 3 / 113 / 193 / 27

4 / 4 4 / 124 / 204 / 28

5 / 5 5 / 135 / 215 / 29

6 / 6 6 / 146 / 226 / 30

7 / 7 7 / 157 / 237 / 31

TelcoLatching Loop

Integer (1 - 2) read/write enable(1)*inhibit(2)

Inhibits or enables a unit from going into a latching loopback when requested by Telco.

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)

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Table C-11 SC5520 Master Table (GDC SC5520 MIB)(objects in this table apply to remote NMS 520 DSUs, not to remote NMS 510 DSUs)


AddRemote Address

Octet String (Size(18))

read/write Add Remote address from Master tells the master (SC5520) how many remote units are in its network, the serial numbersof those remote units, and their Drop addresses. This infor-mation allows the Master to perform alarm reporting func-tions in a multipoint configuration. Remote alarm reporting only works in DDS1.

SET this object to add a remote unit to the network table of the master unit. Specify the Serial Number of the remote unitin the first 16 locations of the octet string, and specify the drop address (00 to 31) in the last two locations. Reading this ob-ject reports the last serial number/address added or deleted.

DelRemote Address

Octet String (Size(18))

read/write Delete Remote address from Master tells the master (SC5520how many remote units are in its network, the serial numbersof those remote units, and their Drop addresses. This infor-mation allows the Master to perform alarm reporting func-tions in a multipoint configuration. Remote alarm reporting only works in DDS1.

SET this object to delete a remote unit from the network table of the master unit. Specify the Serial Number of the remote unit in the first 16 locations of the octet string, and specify the drop address (00 to 31) in the last two locations. Reading thisobject reports the last serial number/address added or deleted

Enable RemoteAlarm

Integer (1 - 31) read/write Enable Remote Alarm Control tells the master (SC5520) how to configure the remote units in a multipoint configuration with respect to alarm reporting. The master unit maintains alarm information about the remote units in its network. This object allows the master unit to enable alarm reporting on anyremote unit in its network.

SET this object to enable a remote unit to report alarms. Specify the Drop address (1 to 31) of the Remote. Reading this object reports the last address added or deleted.

DisableRemoteAlarm

Integer (1 - 31) read/write Disable Remote Alarm Control tells the master (SC5520) how to configure the remote units in a multipoint configura-tion with respect to alarm reporting. The master unit main-tains alarm information about the remote units in its network. This object allows the master unit to disable alarm reporting on any remote unit in its network.

SET this object to disable a remote unit so that it does not report alarms. Specify the Drop address (1 to 31) of the Re-mote. Reading this object reports the last address added or deleted.

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Table C-12 SC5520 Alarm Table (GDC SC5520 MIB)

Alarm Meaning

NoResponse Alm*

No Response

DiagRxErrAlm* Diagnostic Receive Error — the DSE is not receiving signals from the SCM card on the backplane.

PowerUpAlm* Power Up Alarm — sent each time the DSE is powered On or has its power cycled.

EEChkSumErr Alm

EEPROM Corrupt — DSE firmware has failed a CRC check.

FpTestAlm Front Panel Test — DSE is in a test mode commanded by a front panel switch.

DSRLossAlm DSR Loss

DTRLossAlm DTR Loss

DTPLossAlm DTP Loss

DCDLossAlm DCD Loss

RXDLossAlm RXD Loss

TXDLossAlm TXD Loss

TmShortedAlm Each of these alarms indicates that a possible short circuit

DcdShortedAlm involving the specified DSE output signal has been detected

DsrShortedAlm in the DSE-to-DTE cable.

CtsShortedAlm

RxdShortedAlm

RxcShortedAlm

TxcShortedAlm

DBURequestFor Scan Alm

Future use

DBUOnAlm Future use

DBUFailedAlm Future use

CSULoopback Alm

CSU Loopback(network) — DSE is in a CSU loopback commanded by the Tel-co STC.

* Not maskable

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Table C-13 SC5520 Maintenance Table (GDC SC5520 MIB)


LedStatus Display string read-only Returns three binary octets that serve as a snapshot of front panel EIA indicators and other conditions in the SC 5520 DSE.

Octet 1 bit 7 - not usedbit 6 - ONbit 5 - INSVbit 4 - RSP bit 3 - TMGbit 2 - future usebit 1 - future use bit 0 - future use

Octet 2 bit 7 - not usedbit 6 - SDbit 5 - RDbit 4 - RSbit 3 - CO

SoftReset Integer (1-2) read/write This object has two values associated with it: normal(1) which is read-only, and re-set(2) which is write-only. Performing a SET to the value reset(2) causes a software reset in the SC 5520 DSE. When the reset is completed the object again contains the value normal(1).

SysUpTime TimeTicks read-only This read-only variable is used to report the elapsed system time, in ticks, for conver-sion to real time at the controller. It is not related to the sysUpTime referenced in MIB-II. Upon power-up of the unit, the elapsed time is cleared. The elapsed time counter rolls over upon reaching the maxi-mum count.

PrivateStorage1PrivateStorage2PrivateStorage3

Display String (Size(16))

read/write Each of these three objects provides 16 characters of memory for general purpose storage.

GDC 076R102-000, Issue 4


Table C-14 SC5520 Diagnostic Configuration Table (GDC SC5520 MIB) (* = Default Setting)



DiagSendCode Integer (1-4) read/write sc5520SendOtherPattern(1)*

sc5520Send511 Pattern(2)

sc5520Send2047Pattern(3)

sc5520Send15BitPattern(4)

This object is used to select the self test pat-tern the DSE sends and checks during any diagnostic test that involves self test.

The default, SendOtherPattern(1), selects the 15-bit pattern when the DSE is set for 56 kbps, DDS/SC, multi-point operation. In all other conditions it selects the 511-bit pattern.

DiagTest Exceptions

Integer (1-4) read-only noExcep-tions(1)

blocksOutOf Range(2)

bitsOutOf Range(3)

blocksAndBits OutOfRange(4)

This object indicates the exceptions that have occurred that may affect the interpre-tation of test results. The value is a sum that has an initial value of zero. The value associated with each exception is added to the sum to arrive at the final, displayed re-sult.

value exception 0 No errors1 bit over range 2 block over range 4 bit and block over range

DiagBitErrors Integer (0..65535)

read-only This object displays the number of bit er-rors that occurred in the last diagnostic test that involved a Selftest pattern. The valid range is 0 to 1,023 bit errors. The value 65535 is returned if the test was terminated early for any reason.

Bit errors should be read only after the test is completed. Reading bit errors while a di-agnostic test is running causes the unit to drop out of test and invalidate the bit errors.

DiagBlock Errors

Integer (0..65535)

read-only This object displays the number of block errors that occurred in the last diagnostic test that involved a Selftest pattern. The valid range for block errors is 0 to 1,023. The value 65535 is returned if the test was terminated early for any reason.

Block errors should be read only after the test is completed. Reading block errors while a diagnostic test is running causes the unit to drop out of test and invalidate the block errors.

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Table C-14 SC5520 Diagnostic Configuration Table (GDC SC5520 MIB) (Continued)


DiagTestReset Integer (1-3) read/write noTestAc-tive(1) -- read only

testActive(2) -- read only

resetTest(3)-- write only

The two read-only values of this object dis-play test status. The write-only value, re-setTest(3) halts execution of any diagnostic test that is running.

DiagTime Delay

Integer (0..16383)

read-only This object displays the results of a Net-work Delay Test, which can range from 0 to 4096 milliseconds. The test takes about 10 seconds, and the results are valid only after it is completed.

The value 16,383 is returned if the test was terminated early for any reason. Attempt-ing to read this object while the delay test is running causes the unit to drop out of test.

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Table C-15 SC5520 Diagnostic Execution Table (GDC SC5520 MIB)



DiagExtLine loop

Integer (1-3) read/write lineloopOff(1) -- read only

lineloopOn(2) -- read only

external(3) -- write only

The two read-only values of this object dis-play the status of the External (no self test) Lineloop. The write-only value, exter-nal(3) activates the loopback. To halt the test, SET the DiagTestReset object in the Diagnostic Configuration Table.

The Lineloop causes data from the DTE to be looped back. The loopback can be either Unilateral or Bilateral, depending on the setting of the ddsDteTermaloop option. A test pattern has to be provided by the DTE or by test equipment connected to the DTE interface.

There are no test results associated with this test. Note, however, that attempting to read test results via the DiagBitErrors or Diag-BlockErrors objects in the Diagnostic Con-figuration Table while the test is running causes the test to terminate.

DiagInt Lineloop

Integer (1-10) read/write lineloopOff(1)-- Read only

lineloopOn(2)-- Read only

blocks1(3)-- Write only






blocks10000(9)

To initiate a Lineloop with Selftest and specify the number of blocks the Selftest pattern generator is to run, SET this object. There are 1000 bits in each block. Enumer-ations 3 (1 block) through 10 (50,000 blocks) are write only. The only valid re-sponses to a READ are lineloopOn(2) or lineloop Off(1). The test terminates after running the specified number of blocks. It can also be terminated by the DiagTest Re-set object in the Diagnostic Configuration Table.

Once the test is complete, you can read the results via the DiagBitErrors or DiagBlock-Errors objects in the Diagnostic Configura-tion Table. Test results should be read only after the test is completed. Attempting to read results while the test is running causes it to terminate prematurely and render the

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Table C-15 SC5520 Diagnostic Execution Table (GDC SC5520 MIB) (Continued)



DiagExt Dataloop

Integer (1-3) read/write dataloopOff(1)-- Read only

dataloopOn(2)- Read only

external(3)-- Write only

To initiate a Dataloop test with no Selftest, SET this object and specify external. This command causes the DSE to loop the data it receives back to its source at the DTE at-tached to the far end unit (nms520).

Enumeration external(3) is write only. The only valid response to a READ is data-loopOn(2) or dataloopOff(1).

To halt the test, SET the DiagTestReset ob-ject in the Diagnostic Configuration Table.


Reading test status on the remote unit via nms520DiagTestStatus may interfere with

DiagTestStatus Integer (1-6) read only noTest(1)

lineloop(2)-- Analoop

dataloop(3)-- Dataloop

serviceTest-CenterLoop(4)-- Network ini-tiated loopback

selftest(5)-- Selftest

networkDe-lay(6)-- Network De-lay Test

This read-only object gives the current di-agnostic test status. noTest indicates that no diagnostic test is currently active.

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Table C-15 SC5520 Diagnostic Execution Table (GDC SC5520 MIB) (Continued)


DiagExt RemoteLoop

Integer (1-3) read/write remote-loopOff(1)-- Read only

remote-loopOn(2)-- Read only


Point to Point Application only.

To initiate a Remote Loop test with no Self-test SET this object and specify external. The sc5520 DSE transmits an in-band com-mand to its remote DSU, directing the re-mote to loop received signals back onto the network.

The DSE is configurable to send (and ac-cept) either a V.54 or a PN127 remote loop command. The remote DSU must be con-figured to accept the same command the DSE transmits. Enumeration external(3) is write only. The only valid response to a READ is remoteloopOn(2) or remote-loopOff(1). To halt this test you must SET the sc5520DiagTestReset object unless op-tion RemLoopTimeOut is enabled. If it is enabled, the maximum test time is 10 min-utes.

DiagRem LoopWithSelf

Integer (1- 10) read/write remote-loopOff(1) -- Read only

remote-loopOn(2) -- Read only

blocks1(3) -- Write only





blocks5000(8)

To initiate a Remote Loop with Selftest SET this object and specify a blocksize. The remote unit goes into remote loop and the master (the sc5520) unit goes into Self-test.

The sc5520 transmits an in-band command to its remote DSU, directing the remote to loop received signals back onto the net-work. The DSE is configurable to send (and accept) either a V.54 or a PN 127 re-mote loop command. The remote DSU must be configured to accept the same com-mand the DSE transmits.

The sc5520 enables its internal Test Pattern Generator to provide the signal for the Re-mote Loop and enables its Test Pattern Checker to verify the signal. The DSE is isolated from its DTE while the Test Pat-tern Generator and Checker are enabled.

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SC 5000 MIB TableTable C-16 GDC SC 5000 Timing Table (GDC SC5000 MIB)

(* = Default Setting; ** = Not Applicable)


gdcSc5000Src ShelfTiming

INTEGER read-write inhibit(1)*fourMeg-Clk(2)**eightKiloClk(3)fourMegAnd8k Clk(4)**

Identifies which unit or units are the source of shelf timing (fourMegClk) and system timing (eightKiloClk), defined as follows:

If one unit is defined as fourMegClk(2) then only one other unit may be defined as eightKiloClk(3), and the remaining units must be defined as inhibit(1).

If one unit is defined as eightKiloClk(3) then only one other unit may be defined as fourMegClk(2), and the remaining units must be defined as inhibit(1).

If one unit is defined as fourMegAnd8k Clk(4) then all the remaining units must be defined as inhibit(1).

The SC 5520 DSE cannot be the source of the fourMegClk shelf timing. The valid settings for this object in the DSE are inhib-it(1) or eightKiloClk(3). The DSE returns

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NMS 520 MIB TablesTable C-17 NMS520 Unit Configuration Table (GDC NMS520 MIB)

(* = Default Setting)



PtToPtSentry Time

Integer (0..127) read/write (60 minutes de-fault)

Point to point sentry time object. The value of this object controls how long a remote unit in a point to point application waits be-tween sending unsolicited alarm responses when there are no alarm conditions to re-port. The unsolicited responses, which are intrusive to data, maintain the management link between the two units. Wait times range from 1 to 127 minutes, with a default of 60. The 0 (zero) minutes value disables remote alarm sentry reporting.

AlarmHyst Time

Integer (1..127) read/write (10 seconds de-fault)

Alarm hysteresis time object. The value of this object controls how long a remote must wait between reporting unsolicited alarm conditions. A remote sends an unsolicited alarm response at the time of its first alarm. If a second alarm occurs, the remote must wait for the length of time specified by this object before it can send another alarm re-sponse. This time applies for both point to point and multipoint applications. The range is from 1 second to 127 seconds, with a default value of 10 seconds.

MtpointRm RspIntrvl

Integer (0..127) read/write (10 seconds de-fault)

The Multipoint remote response object. The value of this object controls how long a remote unit in a multipoint application waits between sending unsolicited alarm responses when there are no alarm condi-tions to report. The unsolicited responses, which are non-intrusive to data, maintain the management link between the two units. The range of wait times is from 1 to 127 seconds, with a default of 3. The 0 (ze-ro) seconds value disables remote alarm sentry reporting. All remotes in a multi-point application must be set the same.

DtePortType Integer (1 - 3) read/write rs232(1)v35(2)auto(3)*

The DTE Port Type object. The value rs232(1) forces the DTE port to operate as an EIA/TIA-232-E interface. The value v35(2) forces the DTE port to operate as a V.35 interface. The value auto(3) specifies that the DTE port interface type is to be de-tected and set automatically.

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Table C-17 NMS520 Unit Configuration Table (GDC NMS520 MIB) (Continued)(* = Default Setting)




The RTS/CTS Delay object. The value of this object specifies how long the DSE de-lays after RTS from the DTE goes On be-fore it turns CTS On.

ctsOn(1) Forces both RTS and CTS On (transmitter On) regardless of the state of RTS. MIB object nms520DteCts De-layExt is ignored.

cts0mSec(2)Provides a zero bit-time delay. This delay can be extended by the value of MIB object nms520Dte CtsDelayExt.

ctsFix3Char(3)Provides a delay equal in du-ration to three characters. This delay can be extended by the value of MIB object nms520DteCtsDelayExt.

DteCtsDelay Ext


RTS/CTS Delay options extensionext0mSec(1)Used to enable options

cts0mSec(2) or ctsFix3Char(3) from MIB object nms520DteCtsDelay.

ext30mSec(2)Provides 30 msec of delay between active RTS and CTS being set to active. MIB object nms520DteCtsDelay must be set for either cts0mSec(2) or ctsFix3Char(3).

ext60mSec(3)Provides 60 msec of delay between active RTS and CTS being set to active. MIB object nms520DteCtsDelay must

GDC 076R102-000, Issue 4





nms520 FirmwareLevel

Display string read-only This object displays the version identifier of the DSU firmware.

DaisyChainBps Integer (1 - 2) read/write bps75(1)-- data rate is 75 bits/sec

bps9600(2)*-- data rate is 9600 bits/sec

Indicates data rate at which management data is sent/received when the gdcNms ManagementSource is daisyChain(4).

AlarmCfg CountWindow

Integer (1..15) read-write The DDS Alarm Threshold Alarm Interval. It specifies the amount of time in minutes, 1 to 15, in which the threshold setting must be exceeded for the alarm to occur. There are five alarms that require an interval and threshold: Jitter, BPV, Frame Loss, Signal to Noise Ratio, and Rx Signal Low. The threshold is set in the NMS 520 Alarm Configuration table.

SoftReset Integer (1 - 2) (1) read only(2) write only

normal(1)reset(2)

This object is used to command a software reset in the dataset.

FrontPanel Inhibit




This object can be used to inhibit operation of the DSU front panel test switches. If a test switch is activated while inhibited, it is ignored.


The nms520FrontPanelEnable object is used to change front panel status from In-hibited to Enabled.

FrontPanel Enable




This object can be used to enable operation of the DSU front panel test switches.


The nms520FrontPanelInhibit object is used to change front panel status from En-abled to Inhibited.

GDC 076R102-000, Issue 4






PiggyBack Detect


Set to 2 when either a Data Rate Adapter or 530 card is installed on the DSU.

UnitType Integer (1 - 2) read-only singleHeight(1)withIFP(2)

with IFP(2) means that the unit has an LCD configurable display. single-height(1) means that the unit does not have an LCD configurable display.

ExtPortCtrl Out1

Integer (1 - 2) read/write on(1)off(2)

This option sets the state (on/off) of exter-nal output 1 at the current network element and displays the output state.

ExtPortCtrl Out2



GDC 076R102-000, Issue 4


Table C-18 NMS520 Alarm Table (GDC NMS520 MIB)


Alarm Meaning

NoResponse Alm*

No Response

DiagRxErrAlm* Diagnostic Receive Error

PowerUpAlm* Power Up Alarm — sent each time the DSU is powered On or has its power cycled.

EEChkSum ErrAlm

EEPROM Corrupt — DSU firmware has failed a CRC check.

StcLoopback Alm

DSU commanded into loopback by Telco Serving Test Center.

NoNtwkLoop CurrentAlm

No network loop current at the DSU.

LinePairs ReversedAlm

Line pairs reversed at the DSU.

NoSignalAlm No signal

FpTestAlm Front Panel Test — DSU is in a test mode commanded by a front panel switch.

StreamingAlm Streaming condition at the DSU.

DSRLossAlm DSR Loss

DTRLossAlm DTR Loss

DTPLossAlm DTP Loss

DCDLossAlm DCD Loss

RXDLossAlm RXD Loss

GDC 076R102-000, Issue 4


Table C-18 NMS520 Alarm Table (GDC NMS520 MIB) (Continued)

Alarm Meaning

TXDLossAlm TXD Loss

TmShortedAlm Each of these alarms indicates that a possible short circuit

DcdShortedAlm involving the specified DSU output signal has been detected

DsrShortedAlm in the DSU-to-DTE cable.

CtsShortedAlm

RxdShortedAlm

RxcShortedAlm

TxcShortedAlm

JitterAlm Excessive jitter detected at the DSU — subject to configured interval and threshold.

BpvAlm Excessive bipolar violations detected at the DSU — subject to config-ured interval and threshold.

FrameLossAlm Indicates Frame Loss condition at the DSU — subject to configured in-terval and threshold.

Signal ToNoiseAlm

Poor signal to noise ratio at the DSU — subject to configured interval and threshold.

RxSignalLow Alm

Low receive signal at the DSU — subject to configured interval and threshold.

DBURequestFor Scan Alm

Future use

DBUOnAlm Future use


NoDSU ResponseAlm

NoDTE PollingAlm

* Not maskable

GDC 076R102-000, Issue 4


Table C-19 NMS520 Alarms Configuration Table (GDC NMS520 MIB)

Table C-20 NMS520 Line Statistics Table (GDC NMS520 MIB)



AlarmCfg Threshold

Integer (0..99) read/write This function sets/reads the alarm threshold settings criteria. This threshold is used, along with the alarm window, to determine the value that must be exceeded in a given time frame for a given alarm to be consid-ered active. The following values apply to the alarms that are subject to configured interval and threshold:

AlarmRangeDefaultJitter0 to 99 %9%BPV0 to 99 Count10Frame Loss0 to 99 Count10S/N Ratio 0 to 50 0Rx Signal Low -50 to 6 dB-33 dB


LineStats Interval

Integer (1..15) read-only The DDS Line Statistics Interval. It speci-fies the amount of time in minutes (1 to 15 minutes) that the unit uses to report statisti-cal information. The unit records statistics every minute and holds the information for 15 minutes. Past statistics can read from 1 to 15 minutes ago. A time must be speci-fied to read any object in the ms520LineStatsTable.

Line StatsTx Interpretation

Integer read-only normal(1)noSignal(2)notAvailable(3)overRange(4)

This object reports the status of the line measurements for the selected period. If noSignal(2), it indicates that there is no re-ceive signal available. If notAvailable (3), it indicates that the measurements have not completed. And if overRange (4), it indi-cates that the measurements taken are overthe measument range.

LineStatsTx Level

Integer read-only txLevel0dB(1)txLevel6dB(2)

Reports the transmit Level of the line: 0dB txLevel0dB(1), or 6dB txLevel6dB(2).

LineStatsRx Level

Integer (-50..6)

read-only This object reports the receive level mea-sured X minutes ago (1 to 15 minutes) as specified by nms520Line StatsInterval. The range is from -50dB to +6dB.

LineStats Signal To Noise Ratio

Integer (0..50) read-only This object reports the signal to noise ratio measured X minutes ago (1 to 15 minutes) as specified by nms520Line StatsInterval. The range is from 0 to 50, for the selected period. The value is absolute.

GDC 076R102-000, Issue 4


Table C-20 NMS520 Line Statistics Table (GDC NMS520 MIB) (Continued)

Table C-21 NMS520 Diagnostic Configuration Table (GDC NMS520 MIB)



LineStats SignalQuality

Integer read-only good(1)fair(2)bad(3)

This object reports the signal quality of the line measured X minutes ago (1 to 15 min-utes) as specified by nms520Line StatsIn-terval.

LineStatsJitter Integer (0..99) read-only This object reports the percent jitter of the line measured X minutes ago (1 to 15 min-utes) as specified by nms520Line StatsIn-terval. The range is from 0% to 99% jitter.

LineStatsBpv Count

Integer (0..99) read-only This object reports the number of bipolar violations that have occurred over the last X minutes (1 to 15 minutes) as specified by nms520Line StatsInterval. The range is from 0 to 99 violations.

LineStats FrameLoss Count

Integer (0..99) read-only This object reports the number of frame losses that have occurred over the last X minutes (1 to 15 minutes) as specified by nms520Line StatsInterval. The range is from 0 to 99 frame losses.


DiagSendCode Integer (1-4) read/write sendOther Pat-tern(1)

send511 Pat-tern(2)

send2047 Pat-tern(3)

send15Bit Pat-tern(4)

Configures the selftest pattern to be run during any diagnostic test involving selft-est. If SendOtherPattern is selected and the unit is set for 56k-DDS/sc-multi point, the pattern defaults to 15 bit. The pattern de-faults to 511 bit for all other conditions.

DiagTest Exceptions



bitsOutOf Range(3)


This object indicates the exceptions that have occurred that may affect the interpre-tation of test results.

The value is a sum that has an initial value of zero. The value associated with each ex-ception is added to the sum to arrive at the final, displayed result.


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Table C-21 NMS520 Diagnostic Configuration Table (GDC NMS520 MIB) (Continued)




Bit errors should be read only after the test is completed. Reading bit errors while a di-agnostic test is running causes the unit to drop out of test and invalidates the bit er-rors.

DiagBlock Errors

Integer (0..65535)


Block errors should be read only after the test is completed. Reading block errors while a diagnostic test is running causes the unit to drop out of test and invalidates the block errors.

DiagTestReset Integer (1-3) read/write normal(1) -- read only

diagnostic(2) -- read only


The two read-only values of this object dis-play test status. The write-only value, re-setTest(3) halts execution of any diagnostic test that is running. This object should only be used to terminate the test because reading this object terminates the test.

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Table C-22 NMS520 Diagnostic Execution Table (GDC NMS520 MIB)



DiagInt Lineloop









blocks10000(9)

Once the test is complete, you can read the results via the DiagBitErrors or DiagBlock-Errors objects in the Diagnostic Configura-tion Table. Test results should be read only after the test is completed. Attempting to read results while the test is running causes it to terminate prematurely and renders the results invalid.

To obtain the current Test Status, read this object or the nms520DiagTest Status object on the unit under test.

Lineloop (or Analoop) can be either a Bilat-eral or Unilateral loopback, depending on the setting of the ddsDte Termaloop option.

DiagInt Dataoop


dataloopOn(2)-- Read only







blocks10000(9)

To initiate a Dataloop with Selftest and specify the number of blocks the Selftest pattern generator is to run, SET this object. The remote (nms520) unit goes into Data-loop and the master (sc5520) unit goes into Selftest. There are 1000 bits in each block. Enumerations 3 (1 block) through 10 (50,000 blocks) are write only. The only valid responses to a READ are data-loopOn(2) or dataloop Off(1). The test ter-minates after running the specified number of blocks. It can also be terminated by the DiagTest Reset object in the Diagnostic Configuration Table.

Once the test is complete, you can read the results via the DiagBitErrors or DiagBlock-Errors objects in the Diagnostic Configura-tion Table. Test results should be read only after the test is completed. They are avail-

GDC 076R102-000, Issue 4


-

i-

Table C-22 NMS520 Diagnostic Execution Table (GDC NMS520 MIB) (Continued)



Diag End ToEnd Selftest

Integer (1-10) read/write endToEndOff(1)-- Read only

endToEndOn(2)-- Read only







blocks10000(9)

To initiate an End To End Selftest and specify the number of blocks the Selftest pattern generator is to run, SET this object.Both the remote (nms520) and master (sc5520) units go into Selftest. There are 1000 bits in each block. Enumerations 3 (1block) through 10 (50,000 blocks) are write only. The only valid responses to a READ are endToEndOn(2) or endToEndOff(1). The test terminates after running the specified number of blocks. It can also be termi-nated by the DiagTest Reset object in the Diagnostic Configuration Table.

Once the test is complete, you can read theresults via the DiagBitErrors or DiagBlock-Errors objects in the Diagnostic Configura-tion Table. Test results should be read onlyafter the test is completed. They are avail-able from both the remote (nms520) and

DiagNetwork Delay

Integer (1-3) read/write delayTestOff(1) -- Read only

delayTestOn(2) -- Read only

runDelayTest(3) -- Write only

To initiate a Network Delay test, SET this object and specify runDelayTest. Both theremote (nms520) and master (sc5520) unitsgo into a test to measure network delay.

Enumeration 3 is write only. The only val-id responses to a READ are delayTest-On(2) or delayTestOff(1). This test terminates after 10 seconds. Test results should be read only after the test is com-pleted, and are available from the master (sc5520) unit.

The current Test Status can be obtained byreading the sc5520DiagTestStatus object on the master unit. Reading test status onthe remote unit may interfere with the test and cause errors. This test cannot be termnated early once it is started.

GDC 076R102-000, Issue 4





internal-Lineloop (2) -- Analoop & Selftest

externalData-loop (3) -- Dataloop

internalData-loop (4) -- Dataloop & Selftest


endToend(6)-- End To End

This object gives the current diagnostic test status. noTest indicates that no diagnostic test is currently active. Reading this object while in a diagnostic test that involves two units may interfere with a selftest pattern and invalidate the test results.

Reading the sc5520DiagTestStatus (master unit) object during diagnostic tests involv-ing two units does not disrupt the test re-sults.

DiagExt Dataloop




To initiate a Dataloop test with no Selftest, SET this object and specify external. This command causes the DSU to loop the data it receives back to its source at the DTE at-tached to the master unit (sc5520).





GDC 076R102-000, Issue 4


NMS 510 MIB TablesTable C-23 NMS510 Unit Configuration Table (GDC NMS510 MIB)

(* = Default Setting)


MIB Object Syntax Access Enumera-tion

Description


The RTS/CTS Delay object. The value of this object specifies how long the DSE de-lays after RTS from the DTE goes On be-fore it turns CTS On.

ctsOn(1) Forces both RTS and CTS On (transmitter On) regardless of the state of RTS. MIB object nms510DteCtsDelay Ext is ignored.

cts0mSec(2)Provides a zero bit-time delay. This delay can be extended by the value of MIB object nms510DteCtsDelay Ext.

ctsFix3Char(3)Provides a delay equal in du-ration to three characters. This delay can be extended by the value of MIB object nms510DteCtsDelayExt.

DteCtsDelay Ext


RTS/CTS Delay options extensionext0mSec(1)Used to enable options

cts0mSec(2) or ctsFix3Char (3) from MIB object nms510DteCts De-lay.

ext30mSec(2)Provides 30 msec of delay between active RTS and CTS being set to active. MIB object nms510DteCtsDelay must be set for either cts0mSec(2) or ctsFix3 Char(3).

ext60mSec(3)Provides 60 msec of delay between active RTS and CTS being set to active. MIB object nms510DteCtsDelay must

GDC 076R102-000, Issue 4





nms510 FirmwareLevel

Display string read-only This object displays the version identifier of the DSU firmware.

AlarmCfg CountWindow

Integer (1..15) read-write The DDS Alarm Threshold Alarm Interval. It specifies the amount of time in minutes, 1 to 15, in which the threshold setting must be exceeded for the alarm to occur. There is one alarm that requires an interval and threshold: nms510FrameLossAlm. The threshold is set in the NMS 510 Alarm Configuration table.

SoftReset Integer (1 - 2) (1) read only(2) write only

normal(1)reset(2)

This object is used to command a software reset in the dataset.

FrontPanel Inhibit




This object can be used to inhibit operation of the DSU front panel test switches. If a test switch is activated while inhibited, it is ignored.


The nms510FrontPanelEnable object is used to change front panel status from In-hibited to Enabled.

FrontPanel Enable




This object can be used to enable operation of the DSU front panel test switches.


The nms510FrontPanelInhibit object is used to change front panel status from En-abled to Inhibited.



PiggyBack Detect


Set to 2 when either a Data Rate Adapter or 530 card is installed on the DSU.

GDC 076R102-000, Issue 4




ExtPortCtrl Out1



ExtPortCtrl Out2



GDC 076R102-000, Issue 4


Table C-24 NMS510 Alarm Table (GDC NMS510 MIB)

Alarm Meaning

NoResponse Alm*

No Response

DiagRxErr Alm*

Diagnostic Receive Error

PowerUpAlm* Power Up Alarm — sent each time the DSU is powered On or has its power cycled.

EEChkSumErr Alm

EEPROM Corrupt — DSU firmware has failed a CRC check.

StcLoopback Alm

DSU commanded into loopback by Telco Serving Test Cen-ter.

NoSignalAlm No Signal

FpTestAlm Front Panel Test — DSU is in a test mode commanded by a front panel switch.

StreamingAlm Streaming condition at the DSU.

DSRLossAlm DSR Loss

DTRLossAlm DTR Loss

DTPLossAlm DTP Loss

DCDLossAlm DCD Loss

RXDLossAlm RXD Loss

TXDLossAlm TXD Loss

DBURequest ForScan Alm

Future use

DBUOnAlm Future use


ExtInput ChangeAlm

Indicates change in state of DSU external input.

ExtInputLow Alm

Indicates DSU external input is active.

FrameLossAlm Indicates Frame Loss condition at the DSU — subject to con-figured interval and threshold.

* Not maskable

GDC 076R102-000, Issue 4


Table C-25 NMS510 Alarms Configuration Table (GDC NMS510 MIB)

Table C-26 NMS510 Diagnostic Configuration Table (GDC NMS510 MIB)(* = Default Setting)



AlarmCfg Threshold

Integer (0..99) read/write This function sets/reads the alarm threshold settings criteria. This threshold is used, along with the alarm window, to determine the number of instances of Frame Loss that must occur in a given time frame for a Frame Loss alarm to be considered active. Frame Loss alarms are only reported for the DDS-2 line type.


DiagSendCode Integer (1-4) read/write sendOther Pat-tern(1)*

send511 Pat-tern(2)

send2047 Pat-tern(3)

send15Bit Pat-tern(4)

Configures the selftest pattern to be run during any diagnostic test involving selft-est. If SendOtherPattern is selected and the unit is set for 56k-DDS/sc-multi point, the pattern defaults to 15 bit. The pattern de-faults to 511 bit for all other conditions.

DiagTest Exceptions



bitsOutOf Range(3)


This object indicates the exceptions that have occurred that may affect the interpre-tation of test results.

The value is a sum that has an initial value of zero. The value associated with each ex-ception is added to the sum to arrive at the final, displayed result.




Bit errors should be read only after the test is completed. Reading bit errors while a di-agnostic test is running causes the unit to drop out of test and invalidates the bit er-rors.

GDC 076R102-000, Issue 4


Table C-26 NMS510 Diagnostic Configuration Table (GDC NMS510 MIB) (Continued)

Table C-27 NMS510 Diagnostic Execution Table (GDC NMS510 MIB)



DiagBlock Errors

Integer (0..65535)


Block errors should be read only after the test is completed. Reading block errors while a diagnostic test is running causes the unit to drop out of test and invalidates the block errors.

DiagTestReset Integer (1-3) read/write normal(1) -- read only

diagnostic(2) -- read only


The two read-only values of this object dis-play test status. The write-only value, re-setTest(3) halts execution of any diagnostic test that is running. This object should only be used to terminate the test because reading this object terminates the test.


DiagInt Lineloop









blocks10000(9)

To initiate a Lineloop with Selftest and specify the number of blocks the Selftest pattern generator is to run, SET this object. There are 1000 bits in each block. Enumer-ations 3 (1 block) through 10 (50,000 blocks) are write only. The only valid re-sponses to a READ are lineloopOn(2) or lineloop Off(1). The test terminates after running the specified number of blocks. It can also be terminated by the DiagTest Re-set object in the Diagnostic Configuration Table.

Once the test is complete, you can read the results via the DiagBitErrors or DiagBlock-Errors objects in the Diagnostic Configura-tion Table. Test results should be read only after the test is completed. Attempting to read results while the test is running causes it to terminate prematurely and renders the

GDC 076R102-000, Issue 4





DiagInt Dataoop


dataloopOn(2)-- Read only







blocks10000(9)

To initiate a Dataloop with Selftest and specify the number of blocks the Selftest pattern generator is to run, SET this object. The remote (nms510) unit goes into Data-loop and the master (sc5520) unit goes into Selftest. There are 1000 bits in each block. Enumerations 3 (1 block) through 10 (50,000 blocks) are write only. The only valid responses to a READ are data-loopOn(2) or dataloop Off(1). The test ter-minates after running the specified number of blocks. It can also be terminated by the DiagTest Reset object in the Diagnostic Configuration Table.

Once the test is complete, you can read the results via the DiagBitErrors or DiagBlock-Errors objects in the Diagnostic Configura-tion Table. Test results should be read only after the test is completed. They are avail-

Diag End ToEndSelftest

Integer (1-10) read/write endToEnd-Off(1)-- Read only

endToEn-dOn(2)-- Read only






blocks5000(8)

To initiate an End To End Selftest and specify the number of blocks the Selftest pattern generator is to run, SET this object. Both the remote (nms510) and master (sc5520) units go into Selftest. There are 1000 bits in each block. Enumerations 3 (1 block) through 10 (50,000 blocks) are write only. The only valid responses to a READ are endToEndOn(2) or endToEndOff(1). The test terminates after running the speci-fied number of blocks. It can also be termi-nated by the DiagTest Reset object in the Diagnostic Configuration Table.

Once the test is complete, you can read the results via the DiagBitErrors or DiagBlock-Errors objects in the Diagnostic Configura-tion Table. Test results should be read only after the test is completed. They are avail-able from both the remote (nms510) and

GDC 076R102-000, Issue 4





DiagNetwork Delay

Integer (1-3) read/write delayTest-Off(1) -- Read only

delayTestOn(2) -- Read only

runDelay-Test(3) -- Write only

To initiate a Network Delay test, SET this object and specify runDelayTest. Both the remote (nms510) and master (sc5520) units go into a test to measure network delay.

Enumeration 3 is write only. The only val-id responses to a READ are delayTest-On(2) or delayTestOff(1). This test terminates after 10 seconds. Test results should be read only after the test is com-pleted, and are available from the master (sc5520) unit.

The current Test Status can be obtained by reading the sc5520DiagTestStatus object on the master unit. Reading test status on the remote unit may interfere with the test and cause errors. This test cannot be termi-nated early once it is started.


internal-Lineloop (2) -- Analoop & Selftest

externalData-loop (3) -- Dataloop

internalData-loop (4) -- Dataloop & Selftest


endToend(6)-- End To End

This object gives the current diagnostic test status. noTest indicates that no diagnostic test is currently active. Reading this object while in a diagnostic test that involves two units may interfere with a selftest pattern and invalidate the test results.

Reading the sc5520DiagTestStatus (master unit) object during diagnostic tests involv-ing two units does not disrupt the test re-sults.

GDC 076R102-000, Issue 4




DiagExt Dataloop




To initiate a Dataloop test with no Selftest, SET this object and specify external. This command causes the DSU to loop the data it receives back to its source at the DTE at-tached to the master unit (sc5520).





GDC 076R102-000, Issue 4

Index

Alarm Configuration .........................................3-11Option Settings ..........................................3-13Screen..........................................................3-12

Application ........................................................1-2Business Equipment Connections .....................2-6Community Name Table....................................C-2Configuration Option Settings ..........................3-7Configuration Screen .........................................3-6Controls and Indicators .....................................3-1CSU Loopback Test ...........................................4-14Data Loop ..........................................................4-10Data Rate Adapter Applications .......................1-3Data Rate Adapter Card ....................................2-3, 2-5DDS MIB

Async DTE Port Configuration Table ........C-9DTE Port Configuration Table ...................C-7DTE Status Table........................................C-10Line Configuration Table............................C-5

Diagnostic Configuration Option Settings ........3-11Diagnostics ........................................................3-9

Screen .........................................................3-10, 4-2DSE Addressing ................................................2-7DSU Loopback Test ..........................................4-12DTE Interface Connections................................2-6EIA 530 Interface Adapter Card .......................2-6EIA/TIA-232-E DTE Interface Signals ............B-1EIA-530 Card Installation .................................2-5EIA-530 DTE Interface Signals ........................B-3Electrical Power Connection .............................2-6Equipment List ..................................................1-4Fault Isolation Procedure ..................................4-1Features .............................................................1-1Firmware Download .........................................3-17

Screen .........................................................3-17Front Panel

Controls ......................................................3-3Indicators ...................................................3-2

GDC Common MIB Alarm Management Related Trap Table ....C-4Alarm Masking Table .................................C-4Alarm Status Table .....................................C-3Configuration .............................................3-6Trap Table...................................................C-1

GDC SC 5000 Timing Table .............................C-22Installation Procedures ......................................2-3Interface Signals ...............................................B-1

ITU-T V.35 DTE Interface Signals ...................B-2Local Test ..........................................................4-3Local Test with Self-Test ..................................4-5Main Menu ........................................................3-5

Screen .........................................................3-6Maintenance ......................................................3-15

Screen .........................................................3-16Management ......................................................1-2Module Installation Procedures .........................2-3Monitor/Alarms .................................................3-13

Screen .........................................................3-14NMS 510 MIB Tables

Alarm Table ................................................C-39Alarms Configuration Table .......................C-40Diagnostic Configuration Table..................C-41Diagnostic Execution Table .......................C-42Unit Configuration Table............................C-37

NMS 520 MIB Tables Alarm Table ................................................C-28Alarms Configuration Table .......................C-30Diagnostic Configuration Table..................C-31Diagnostic Execution Table........................C-33Line Statistics Table....................................C-30Unit Configuration Table............................C-25

Preoperational Check ........................................2-2Remote Loop .....................................................4-6Remote Loop with Self-Test .............................4-8SC 5520 MIB Tables

Alarm Table ................................................C-16Diagnostic Configuration Table..................C-18Diagnostic Execution Table .......................C-20Maintenance Table .....................................C-17Master Table ..............................................C-14Unit Configuration Table ...........................C-11

SCM Main Menu Screen ...................................3-4Self Test ............................................................4-16Shelf Inventory Screen ......................................3-4SpectraComm Shelf ..........................................2-1

ack Panel ....................................................2-2Technical Characteristics .................................A-1Telnet Login Screen ..........................................3-5Terminal Interface .............................................3-4Timing Options .................................................2-7Unpacking and Handling ...................................2-2

GDC 076R102-000, Issue 4

General DataComm

installation and operation - gdcinstallation and operation spectracomm 5520 gdc 076r102-000 issue 4...

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