3COM AccessBuilder 980-000048-001 User Manual

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ACCESSBUILDER 7000

®TRIPLE MODEM MODULE USER GUIDE

Part No. 980/000048/001

Published June 1996

3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145

© 3Com Europe Ltd, 1996. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without permission from 3Com Europe Ltd.

3Com Europe Ltd. reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Europe Ltd to provide notification of such revision or change.

3Com Europe Ltd provides this documentation without warranty of any kind, either implied or expressed, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. 3Com may make improvements or changes in the product(s) and/or the program(s) described in this documentation at any time.

UNITED STATES GOVERNMENT LEGENDS:

If you are a United States government agency, then this documentation and the software described herein are provided to you subject to the following restricted rights:

For units of the Department of Defense:

Restricted Rights Legend: Use, duplication or disclosure by the Government is subject to restrictions as set forth in subparagraph (c) (1) (ii) for restricted Rights in Technical Data and Computer Software clause at 48 C.F.R. 52.227-7013. 3Com Europe Limited, Merchants’ House, Wilkinson Road, Cirencester, Gloucestershire, GL7 1YT United Kingdom.

For civilian agencies:

Restricted Rights Legend: Use, reproduction or disclosure is subject to restrictions set forth in subparagraph (a) through (d) of the Commercial Computer Software - Restricted Rights Clause at 48 C.F.R. 52.227-19 and the limitations set forth in 3Com Corporation’s standard commercial agreement for the software. Unpublished rights reserved under the copyright laws of the United States.

If there is any software on removable media described in this documentation, it is furnished under a license agreement included with the product as a separate document, in the hard copy documentation, or on the removable media in a directory file named LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a copy will be provided to you.

Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not be registered in other countries.

3Com, AccessBuilder, Boundary Routing, LANplex, LanScanner, LinkBuilder, NETBuilder, NETBuilder II, Parallel Tasking, ViewBuilder, EtherDisk, EtherLink, EtherLink Plus, EtherLink II, SmartAgent, TokenLink, TokenLink Plus, TokenDisk and Transcend are registered trademarks of 3Com Corporation. 3TECH, CacheCard, FDDILink, FMS, NetProbe and Star-Tek are trademarks of 3Com Corporation. 3ComFacts is a service mark of 3Com Corporation.

Novell and NetWare are registered trademarks of Novell Inc. Windows is a trademark of Microsoft Corporation. VT100 is a registered trademark of Digital Equipment Corporation.

Other brand and product names may be registered trademarks or trademarks of their respective holders.

IMPORTANT SAFETY INFORMATION

WARNING: Warnings contain directions that you must follow for your personal safety. Follow all instructions carefully.

Please read carefully and thoroughly the following information before installing the AccessBuilder 7000 Triple Modem Module:

Exceptional care must be taken during installation and removal of the module.

The safety status of the interconnection ports on this equipment are as follows:

Ports identified by the label PSTN and LEASE = TNV Ports identified by the labels DTE = SELV

TNV (telecoms network voltage) is a circuit which under normal operating conditions carries telecommunication signals.

SELV (safety extra low voltage) is a secondary circuit which is designed and protected so that under normal and single-fault conditions, the voltage between any two accessible parts does not exceed a safe value (42.2 V peak or 60 V DC).

Only connect apparatus complying with the relevant interface requirements to the ports on this unit.

WICHTIGE SICHERHEITSHINWEISE

ACHTUNG: Die Warnungen enthalten Anweisungen, die Sie zur eigenen Sicherheit zu befolgen haben.

Lesen Sie bitte die folgenden Informationen sorgfältig durch, bevor Sie den AccessBuilder 7000 Triple Modem Module einbauen:

Auf besondere Vorsicht muß während des Einund Ausbaus des Einheits geachtet werden.

Der Sicherheitsstandard der Anschlüsse fuer dieses Gerät sind wie folgt: Anschlüsse bezeichnet mit PSTN und LEASE = TNV

Anschlüsse bezeichnet mit DTE = SELV

TNV (Telecoms Network Voltage - Spannung des Telekommunikationsnetzwerks) ist ein Anschluss, der unter normalen Umständen Telekommunikationssignale enthält .

SELV (Safety Extra Low Voltage - Extra Sicherheitsspannung) ist ein weiterer Anschluss, der unter normalen Umständen und Fehlerkonditionen entworfen und gesichert wurde, so dass die Spannung zwischen zwei erreichbaren Teilen kein gefährliches Niveau erreicht (42.2V max. oder 60V DC).

An den Anschlussbuchsen der Geräte dürfen nur die dafür vorgesehenen Anschlüsse verwendet werden.

L’INFORMATION DE SÉCURITÉ

IMPORTANTE

AVERTISSEMENT: Les avertissements contiennent les instructions que vous devez suivre pour votre sécurité personnelle. Suivre toutes les instructions avec soin.

Veuillez lire à fond l’information suivante avant d’installer le moyeu:

Le soin exceptionnel doit être pris pendant l’installation et l’enlèvement du moyeu.

Les normes de sécurité des ports d'interconnexion sur cet équipement sont les suivants:

Les ports marqués par les etiquettes PSTN et LEASE = TNV Les ports marqués par les etiquettes DTE = SELV

TNV (Telecoms Network Voltage - tension réseau de télécommunications) est un circuit qui dans des conditions d'opérations normales, transfert les signeaux télécoms.

SELV (Safety Extra Low Voltage - tension de sécurité extra-réduite) est un circuit secondaire désigné et protègé qui dans des conditions normales et de fautes uniques, assure que la tension entre deux éléments accessibles n'accedéra pas un niveau de sécurité (42.2V max. ou 60 V DC).

Connecter uniquement des unités conformes aux normes relatives des interfaces de cet équipement.

CONTENTS

IMPORTANT SAFETY INFORMATION

WICHTIGE SICHERHEITSHINWEISE

L’INFORMATION DE SÉCURITÉ IMPORTANTE

ABOUT THIS GUIDE

 

Introduction

1

 

 

 

How to Use This Guide

1

 

 

Conventions

2

 

 

 

Additional Safety Information

3

 

 

1 TRIPLE MODEM MODULE

 

Introduction

1-1

 

 

 

Principal Features

1-2

 

 

Implementation of V.32terbo 1-3

 

Typical Applications

1-5

 

 

Pack Contents Checklist

1-6

 

 

Registering Ownership of your Triple Modem Module 1-6

 

Pre-installation Requirements

1-7

 

 

2 INSTALLATION AND OPERATION

 

Overview 2-1

 

 

 

Installing The Module

2-2

 

 

Installing the Rear Card

2-3

 

Installing the Front Card

2-4

 

Connecting the Cables 2-5

 

Modem Lines 1-3

2-5

 

 

DTE Ports 1- 3 2-5

 

 

Front Panel LEDs 2-6

 

 

3 TROUBLESHOOTING

Troubleshooting Guide 3-1

Modem Health 3-1

Modem - DTE Connection 3-2

Modem - Telephone Line Connection 3-3

Connection Problems in Answering a Call 3-3

Connection Problems When Originating a Call 3-4

On-line Operation 3-6

 

Private-line Operation

3-6

Dial Backup Operation

3-6

AMODEM SPECIFICATION AND INTERFACE PIN

ASSIGNMENTS

Transmitter / Receiver Specifications

A-1

Autodial - Autoanswer A-2

 

 

Physical Description

A-3

 

 

 

Approvals Information

A-4

 

 

General Approvals Requirements

A-4

Interference and Safety Requirements A-5

PBX and PABX Application

A-6

 

Ringer Equivalence

A-7

 

 

DTE Port Pin Assignments

A-8

 

 

X.21/V.11

A-8

 

 

 

 

V.24/V.28

A-9

 

 

 

 

V.35/V.36

A-10

 

 

 

 

PSTN Port Cable Pin Assignments

A-11

Private Line Port Cable Pin Assignments A-12

B TECHNICAL SUPPORT

On-line Technical Services

D-1

3Com Bulletin Board Service D-1

Access by Modem

D-1

Access by ISDN D-2

World Wide Web Site

D-2

Support from Your Network Supplier D-3

Support from 3Com D-4

Returning Products for Repair D-5

INDEX

LIMITED WARRANTY

FCC CLASS A VERIFICATION STATEMENT

ABOUT THIS GUIDE

Introduction

This guide describes the features, installation and configuration of the AccessBuilder 7000 Triple Modem Module.

This guide assumes that you have installed your AccessBuilder 7000 Access Concentrator and that the phone lines to which you want to connect the modems are installed and operational.

How to Use This Guide

This table shows where to find specific information:

If you are looking for information on:

Turn to:

 

 

The Triple Modem Module’s features and typical

Chapter 1

uses.

 

Installation and descriptions of the front panel

Chapter 2

LEDs and rear panel connectors.

 

Troubleshooting and problem solving.

Chapter 3

Technical information and cable specifications.

Appendix A

ASCII character table.

Appendix B

Regulatory information.

Appendix C

Technical support.

Appendix D

 

 

3COM AccessBuilder 980-000048-001 User Manual

2 ABOUT THIS GUIDE

Conventions

The icon conventions that are used throughout this guide are:

Icon

Type

Description

 

Information Note

Information notes call attention to

 

 

important features or instructions.

 

Caution

Cautions alert you to personal safety

 

 

risk, system damage, or loss of data.

 

Warning

Warnings alert you to the risk of

 

 

severe personal injury.

The text conventions used in this guide are:

Convention

Description

“Enter” vs. “Type”

When the word “enter” is used in this guide,

 

it means type something, then press the

 

[Return] or [Enter] key. Do not press the

 

[Return] or [Enter] key when an instruction

 

simply says “type.”

Text represented as

This typeface is used to represent

screen display

displays on your screen, for example:

 

Enter the unit’s IP address:

Text represented as

This typeface is used to represent

commands

commands that you enter, for example:

 

CO IS NU

Keys

When specific keys are referred to in the

 

text, they are called out by their labels, such

 

as “the Return key” or “the Escape key,” or

 

they may be shown as [Return] or [Esc].

 

If two or more keys are to be pressed

 

simultaneously, the keys are linked with a

 

plus sign (+), for example:

 

Press [Ctrl]+[Alt]+[Del].

Italics

Italics are used to denote new terms or

 

emphasis.

Additional Safety Information

3

Additional Safety Information

See also the Important Safety Information at the front of this guide.

When using the unit, observe the following safety information:

Retain this user’s guide for later use and pass it on in the event of change of ownership of the unit.

Products manufactured by us are safe and without risk provided they are installed, used and maintained in good working order in accordance with our instructions and recommendations.

If any of the following conditions occur, isolate the electricity supply and refer to your 3Com reseller.

If the module is damaged.

If the module begins to make an odd noise, smell or smoke.

If the module shows signs of a distinct change in performance.

Never install telephone wires during a lightening storm, or install telephone connection sockets in wet locations, unless the socket is specifically designed for wet locations.

Do not touch uninstalled telephone wires or terminals unless the telephone line has been disconnected at the network interface. Always exercise caution when installing or modifying telephone lines.

Do not spill food or liquids on the unit. If the unit gets wet, isolate the electrical supply and contact your 3Com reseller.

Do not push any objects into the openings of the unit. Doing so can cause fire or electric shock by shorting out internal components.

Be sure nothing rests on the unit’s system cables and that the cables are not located where they can be stepped on and cause damage to the unit.

Keep the unit away from radiators and heat sources.

Install the unit in a clean area free from dust or extreme temperatures.

Interconnecting directly, or by way of other apparatus, to ports complying with SELV requirements may produce hazardous conditions on the network. Advice should be sought from a competent engineer before such a connection is made.

4 ABOUT THIS GUIDE

1 TRIPLE MODEM MODULE

Introduction

This chapter outlines the features and uses of the AccessBuilder 7000 Triple Modem Module when installed in the AccessBuilder 7000 Access Concentrator chassis.

The Triple Modem Module houses three modems on a single device module that operate independently of each other but are identical in the features and facilities they offer. Each modem is a fully featured, high speed device which provides reliable asynchronous and synchronous operation over dialled or private line networks.

The high speed transfer of up to 33.6 Kbps over dialled lines is guaranteed by using CCITT V.42bis/MNP Class 5 data compression and CCITT V.42/MNP error correction. IN addition to the fast line speeds, each modem can transfer data to the attached computer at speeds which can vary from 300 bps to 115200 bps.

The modems are compatible with a number of dialling methods and protocols, such as asynchronous AT commands and CCITT V.25bis dialling, which allow you to uses the modems in a variety of applications and environments. You can control each Triple Modem’s configuration, dialling characteristics and diagnostic features. Five factory set configurations, containing the most commonly-used Triple Modem settings, are permanently stored in each Triple Modem’s memory, providing a quick and easy method of a configuring a Triple Modem to be compatible with asynchronous and synchronous data environments over 2-wire or 4-wire Private lines or the PSTN.

1-2 CHAPTER 1: TRIPLE MODEM MODULE

Principal Features

Support for dial-up transmission protocols:

V.34 – 2-wire full duplex modems operating at data signalling rates of 33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600, 7200, 4800 and 2400 bps.

Non-proprietary V.32 terbo – 2-wire full duplex modems operating at data signalling rates of 19200, 16800, 14400, 12000, 9600, 7200 and 4800 bps.

V.32bis – 2-wire full duplex modems operating at data signalling rates of 14400, 12000, 9600, 7200 and 4800 bps.

V.32 – 2-wire full duplex modems operating at data signalling rates of 9600 and 4800 bps.

V.23 – 75/1200 bps operation.

V.22bis – 2400 bps full duplex operation.

V.22 and Bell 212A – 1200 bps full duplex 2-wire modem.

V.21 and Bell 103J – 300 bps modems.

Support for leased line transmission protocols:

V.34 – 2-wire or 4-wire full duplex modems operating at data signalling rates of 33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600, 7200, 4800 and 2400 bps.

Non-proprietary V.32 terbo – 2-wire or 4-wire full duplex modems operating at data signalling rates of 19200, 16800, 14400, 12000, 9600, 7200 and 4800 bps.

V.32bis – 2-wire or 4-wire full duplex modems operating at data signalling rates of 14400, 12000, 9600, 7200 and 4800 bps.

V.32 – 2-wire or 4-wire full duplex modems operating at data signalling rates of 9600 and 4800 bps.

2-wire PSTN backup of the Private line.

CCITT V.42bis or MNP Class 5 data compression.

Virtual error-free data passage using CCITT V.42 LAPM or MNP Level 4 error correction.

Introduction 1-3

Asynchronous dial DTE data rates from 300 to 115200 bps.

Modem configuration changes using the DTE interface or throught the Management Controller Module.

Compatibility with the industry standard AT command set.

Storage of up to 20 telephone numbers in directory locations.

Dialling using AT commands, CCITT V.25bis commands or by raising DTR on the Host to modem interface, or by data being sent to the DTE interface.

High-speed transmission using asynchronous or synchronous, or UNIX devices over full duplex dial networks, and 2-wire or 4-wire lines.

Self testing facilities providing local and remote loopbacks, including CCITT-compatible V.54.

Five factory-set configurations and two user definable configurations.

Front panel LEDs to inform you of the current status of any of the three modems.

Easy to install, configure and support.

Implementation of V.32terbo

Support of the V.32terbo transmission protocol is included as a feature in the modems. V.32terbo is a non-proprietary extension of the widely used CCITT V.32bis standard which increases the maximum data signalling rate from 14400 to 19200 bps over dial-up links or private lines.

Compatibility between V.32terbo and V.32bis is maintained in a similar manner as it is between V.32bis and V.32, in that an identical training sequence is used by each standard and that V.32terbo uses a subset of the speeds available in V.32bis.

By default, each modem’s factory configurations enable V.32terbo to be negotiated as the optimum data rate on any given link allowing a 33% increase in line throughput, to 19200bps to be used wherever possible. Where the quality of the line is not good enough to enable transmission at 19200bps, an intermediate speed of 16800 bps can be

1-4 CHAPTER 1: TRIPLE MODEM MODULE

negotiated between modems, providing a 16.7% increase in speed over that which can be negotiated using V.32bis. If the modem you are calling is unable to operate at the same high speeds as your modem, an optimum data transfer rate is negotiated between the two using the default configuration settings.

When using the higher line speeds made available by V.32terbo, the throughput rate can be increased further by using the modem’s error correction and data compression facilities. Compression factors remain virtually unaffected by the increase in line rate, thereby producing a real improvement in data transmission times over those achieved using V.32bis.

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