Raymar 326X V.34 Series, V.34-SDC, V.32bis SERIES, 326X V.34-SDC Series, 326X V.32bis Series User Manual

326X

V.34, V.34-SDC and V.32bis

Series Modem

User’s Guide

0049-1800-XXX 326X V.34, V.34-SDC AND V.32bis SERIES MODEM – USER’S GUIDE 02/23/2010 Rev. A

Raymar Information Technology, Inc.

7325 Roseville Road

Sacramento, CA 95842

800-695-1951

Fax: 916-783-1952

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The products and programs described in this User’s Guide are licensed products of Raymar-Telenetics. This User’s Guide contains proprietary information protected by copyright, and this User’s Guide and all accompanying hardware and documentation are copyrighted.

Raymar-Telenetics does not warrant that the hardware will work properly in all environments and applications, and makes no warranty and representation, either implied or expressed, with respect to the quality, performance, merchantability, or fitness for a particular purpose.

Information in this User’s Guide is subject to change without notice and does not represent a commitment on the part of Raymar-Telenetics. Raymar-Telenetics assumes no responsibility for any inaccuracies that may be contained in this User’s Guide.

Raymar-Telenetics makes no commitment to update or keep current the information in this User’s Guide, and reserves the right to make changes to this User’s Guide and/or product without notice.

No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or information storage and retrieval systems, for any purpose other than the purchaser's personal use, without the express written permission of RaymarTelenetics.

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NOTICE

Restricted Rights Notification for U.S. Government Users

The software (including firmware) addressed in this manual is provided to the U.S. Government under agreement which grants the government the minimum “restricted rights” in the software, as defined in the Federal Acquisition Regulation (FAR) or the Defense Federal Acquisition Regulation Supplement (DFARS), whichever is applicable. If the software is procured for use by the Department of Defense, the following legend applies:

Restricted Rights Legend

Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS

252.227-7013. If the software is procured for use by any U.S. Government entity other than the Department of Defense, the following notice applies:

Notice Notwithstanding any other lease or license agreement that may pertain to, or accompany the delivery of, this computer software, the rights of the Government regarding its use, reproduction, and disclosure are as set forth in FAR 52.227-19(C).

Unpublished - rights reserved under the copyright laws of the United States.

Proprietary Material

Information and software in this document are proprietary to Raymar Information Technology, Inc. (or its Suppliers) and without the express prior permission of an officer of Raymar Information Technology, Inc., may not be copied, reproduced, disclosed to others, published, or used, in whole or in part, for any purpose other than that for which it is being made available. Use of software described in this document is subject to the terms and conditions of the Raymar Information Technology Software License Agreement.

This document is for information purposes only and is subject to change without notice.

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Radio Frequency Interference Regulations

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.

Note : the 3262/63/67/68 Modem is a Class A product. In a domestic environment, this product may cause radio interference, in which case the user may be required to take adequate measures. Changes or modifications not expressly approved by Raymar-Telenetics could void the user's authority to operate the equipment. This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. This is a Class A product. Operation of this equipment in a residential environment may cause radio interference, in which case the user may be required to take adequate measures to correct the interference at his/her own expense. This product is CISPR 22 Class B verified under test conditions that included use of shielded DTE cables. Ferrite cylinders attached to the dial line are required for Modem 3266 (Canada). Leased line cables with 1.5 turns through a ferrite cylinder were also used. Use of different cables will invalidate verification and increase the risk of causing interference to radio and TV reception.

You can obtain the proper cables from Raymar-Telenetics.

Manual is current for Release 8.0 of the 326X Series Modem.

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TABLE of CONTENTS

OVERVIEW ………………………………………………………….. 1

CHAPTER ONE – Introduction....................................…………….. 9

Operating the Modem from the Front Panel...…………….. 12 Selecting Programmed Option Sets………………………… 12 Automatic Calling Interfaces (ACUs)……………………… 12 Managing a Modem………………………………………... 13 Restoring Data Transmission………………………………. 13 ITU-T V.34 Compliant Modulation Mode…………………. 14 Synchronous Data Compression (SDC) Feature…………… 14 Automode/Multimode Feature……………………………... 15 Remote Configuration……………………………………... 15 Error Correction and Data Compression…………………... 15 Security…………………………………………………….. 15

Status Snapshots………………………………………….... 16

Adaptive Rate System…………………………………….... 16

Troubleshooting (V.54 and V.22bis Tests)………………… 16 Country-Specific Information ……………………………… 16

NET Compliance………………………………………….... 16

CHAPTER TWO – Installing the Modem…………………………… 17

Introduction ………………….…………………………….. 17 Unpacking the Modem……………………………………... 18 Additional Equipment Required……………………………. 19 Choosing a Site…………….………………………………. 19 Connecting the Modem…... ……………………………….. 20

Rear Panel Connectors …………………………….. 20 Ferrite Cylinders ………………………………………. 22 Cabling the Modem…………………………………….. 26 Connecting the Modem to an NMS……………………. 28

Turning on the Modem…………………………………. 30 Automatic Self-Test ……………………………………….. 31 After Installing the Modem………………………………… 31

CHAPTER THREE – Getting Started……………………………….. 32

Introduction ………..……………………………………….. 32 System Requirements for Software Upgrades……………… 32 Configuring and Operating the Modem…………………….. 32

Using the Front Panel…………………………………… 32

Navigating the Configuration Menu Tree………………. 35

Setting Configuration Options from the Front Panel…… 35

Using the Modem with an NMS………………………… 38

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Using the AT ACU……………………………………… 38 Other Call Establishment Methods…………………………. 40

V.25bis ACU for Sync or Async Applications…………. 40

NetView LPDA-2 ACU for Sync Applications………… 40

Sync Dialing from an IBM AS 400…………………….. 41

External Auto-Call Units……………………………….. 41

CHAPTER FOUR – Configuring the Modem……………………… 42

Overview…..………………………………………………. 42 Communications Software Package Operating Notes...…… 42

Configuring the Modem for Use with Communications

Software………………… …………………………. 42 Operating Notes ……………………………… 43 If the Communications Software and Modem

Do Not Operate ……………………………….……. 45

Preparing for Operation………. …………………………… 46

Reinitializing Memory from the Front Panel…………… 46 Reinitializing Memory Using the AT&F Command…… 46

Configuration Option Sets…………………………………. 46 What is an Option Set? ………………………………… 46 Configuring an Option Set……………………………… 51

Option Set Defaults …………………………………..... 52

326X V.32bis and 326XFAST Modem Application Examples ………………………………………….. 58

Option Set 1.............................................……………. 59

Option Set 2 ………………………………………….. 60 Option Set 3 ………………………………………….. 60 Option Set 4 ………………………………………….. 61 Option Set 4 ………………………………………….. 62 326XFAST-SDC Modem Application Examples…………. 62 SDC Pre-Operation Notes ……………………………. 63 Configuring the Modem for SDC Operation …………. 63 SDC Sample Applications …………………………… 64 Remote Access Rest ………………………………………. 69 Operation …………………………………………….. 69 When Remote Access Reset Is Disabled …………………. 69

CHAPTER FIVE – Using the AT Automatic Calling Interface…. 70

Introduction ………………………………………………. 70 What is the AT Command Set? ………………………….. 71 What Role Does Communications Software Play? …. 71 Using AT Commands …………………………………….. 71 Entering AT Command Lines ……………………….. 71

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Autobaud Feature …………………………………….. 73 The Escape Sequence – (+ + +) ………………………. 74 Non-Configuration AT Commands …………………… 75 S-Registers ……………………………………………. 77

CHAPTER SIX – Troubleshooting Guide …………………………. 89

Introduction ………………………………………………. 89 Troubleshooting …………………………………………… 89 326X Series Modem Diagnostic Tests ……………………. 97

Synchronous Data Compression (SDC) Testing …….. 98

APPENDIX A – Configuration Quick Reference………………….. 99

APPENDIX B – Cabling and Interface Pinouts …………………… 143

APPENDIX C – Country-Specific Information …………………… 153

RAYMAR-TELENETICS LIMITED WARRANTY ……………… 196

RMA PROCEDURE ………………………………………………… 197

GLOSSARY …………………………………………………………. 198

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Overview

The 326X product documentation set includes the 326X V.34 Series Modem Reference Card.

Optionally, with a 326X Series Modem card backplane (to install a 326X card into a Modular Nest 9 or 21 enclosure), you receive the following:

• 326X Series Modem Cards

Throughout this guide, references to the 326X Series Modem apply to 326X V.32bis, 326X V34, and 326X-SDC Series Modem, unless stated otherwise.

326X Series Modem Family

The 326X product family consists of three series: V.34, V.34 SDC, and V.32bis.

This Series… Supports This

Modulation…

326X FAST V.34 ITU V.34 33.6 kbps 128 kbps, asynchronous 326X FAST-SDC ITU V.34 33.6 kbps 128 kbps, asynchronous

326X ITU V.32bis 14.4 kbps 57.6 kbps,

IMPORTANT:

and Min Rate (AT*MN) parameter options are within the valid range for the mode.

When you select a modulation mode, you must ensure that the Max Rate (AT*MX)

Some 326XFAST-SDC models are available with the V.35-compatible interface. This unit has a DB25 connector, so a converter is required.

This Maximum DCE Rate ….

And This Maximum DTE Rate…

and with proprietary compression, 128 kbps synchronous

asynchronous

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Product Family Model Numbers

Raymar-Telenetics refers to the product family as 326X because the last digit denotes the modem model. Model numbers (“X”) are as follows.

This Model Number… Denotes…

3260, 3261, 3262, 3263 Models for use in the U.S.A. 3265, 3266, 3267, 3268 Equivalent models, respectively, for international

use; provided in country-specific setups

3260, 3265 Standalone models for:

- Two-wire dial operation

- Two-wire leased-line operation

3261, 3266 Standalone models for:

- Two-wire dial operation

- Two- or four-wire leased-line operation

3262, 3267

3263, 3268

Rack-mount dual-modem card models, equivalent to 3260 and 3265, respectively, for Modular Nest enclosure installation Rack-mount single-modem card models, equivalent to the 3266 for Modular Next enclosure installation

Documentation Target Audience

The documentation set assumes that you are familiar with the basic concepts of data communications, that you are an operator only, and that you will not be servicing the modem hardware (other than making initial cabling connections).

Note to Programmers and System Developers

For detailed information on configuration options, equivalent AT Commands, V.25bis AutomaticCalling Unit, NetView’s LPDA-2 dialing commands, or diagnostic tests, order the 326X Series Modem Reference Guide by contacting your Raymar-Telenetics sales representative.

How to Use the Documentation Set

Following is a description of the 326X Series Modem documentation set.

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326X V.34 Series Modem Reference Card

For quick reference to AT, AT&, and AT* commands, dial modifiers, and disconnect codes, see the 326X V.34 Series Modem Reference Card. The card also includes a menu tree of front panel options and AT command settings.

326X V.34 Series Modem User’s Guide

This User’s Guide provides the information needed to install, configure, and operate the modem. Chapter outlines are as follows:

Chapter 1 – About the Modem, introduces the modem’s features.

Chapter 2 – Installing the Modem, explains how to install and cable a modem. Quick-reference figures showing the connections to make are included.

Chapter 3 – Getting Started, discusses how the modem can be used, and recommends how to configure and operate it. The chapter includes a reference guide to the rest of the documentation set for further information.

Chapter 4 – Configuring the Modem, explains how to effectively configure the modem. The four preconfigured option sets are described, along with sample applications that help you choose an option set.

Chapter 5 – Using the AT Automatic Calling Interface, discusses the 326X Series Modem’s AT ACU. This chapter introduces:

- The ACU industry-standard (AT and AT&) commands

- The Raymar-Telenetics enhanced AT command syntax (AT*)

- The AT commands that are referred to as “action” AT commands (rather than “configuration”

AT commands), and S-Register functions and settings

Chapter 6 – Troubleshooting Guide, a quick reference to problems and suggestions for correcting them. This chapter assists you in isolating and correcting a problem before calling Raymar-Telenetics’ Customer Support Center.

Appendix A – Configuration Quick Reference, provides reference material you need to change a modem’s default settings. It describes:

- Configuration options with and without AT equivalents

- Result codes (long and short forms)

- S-Registers

- Dial modifiers

- Numeric entry procedure

- The configuration menu structure

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Appendix B – Cabling and Interface Pinouts, contains the pinouts for the modem’s rear panel connectors and associated cables.

Appendix C – Country-Specific Information, discusses the cabling, rear panel layouts, pinouts and other modem features that are required or restricted by regulatory agencies for each country.

326X V.34 Series Modem Reference Guide

Available as an optional order item, the 326X Series Modem Reference Guide is designed for users who require more detail on operating the modem’s configuration options and diagnostic self-tests. Contact your Raymar-Telenetics sales representative for ordering information.

References

Refer to the following for more information:

- 326X, 326XFAST, and 326XFAST-SDC Series Modem Product Specification Sheets

- EIA Application Note #562, Appendix A (defines cable lengths in terms of DTE rates)

NetView operators should be familiar with:

- NetView Operations Primer (IBM Part No. SC30-3363)

- NetView Operations Scenarios (IBM Part No. SC30-3376)

Trademarks

The following are trademarks or registered trademarks of their respective companies or organizations:

AT is a command language used with the Smartmodem 1200 and the Smartmodem 2400/Hayes Microcomputer Products, Inc.

CompuServ / CompuServ Inc.

MNP (Microcom Networking Protocol) and Relay Gold / Microcom, Inc.

NetView and IBM / International Business Machines Corporation

Novell and NetWare / Novell, Inc.

Telenet / Sprint International Communications Corporation

Tymnet / British Telecommunications

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UNIX / Unix System Laboratories

Conventions Used in This Manual

The following conventions are used in this manual:

- User entries appear as follows: AT*T<CR>

- System messages appear as follows: NO CARRIER

- A carriage return appears as follows: <CR>. It designates the Return or Enter key. It is used

to complete a text entry or initiate an action from the keyboard.

Special Notices

These notices emphasize certain information in the manual. Each serves a special purpose and is displayed in the format shown.

IMPORTANT: Important is used to emphasize any significant procedural information.

Caution: Caution provides information that, if not followed, can result in

damage to software, hardware, or data.

Warning: Warning is the most serious notice, indicating that you can be physically hurt.

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Messages spéciaux

Les messages suivants mettent en valeur certaines informations dans le guide. Chacun d’eux remplit une fonction spéciale et est affiché dans le format indiqué.

IMPORTANT: Important est utilisé pour souligner des informations critiques au sujet d’une procédure.

Mise en Garde: Une mise en garde vous fournit des informations quie, si elles ne sont pas observées, peuvent se traduire par des dommages pour le logiciel, le matériel ou les données.

Avertissement: Un avertissement constitue le message le plus sérieux, indiquant que vous pouvez subir des blessures corporelles.

Besondere Hinweise

Durch die folgenden Hinweise werden bestimmte Informationen in diesem Handbuch hervorgehoben. Jeder Hinweis dient einem bestimmten Zweck und wird im dargestellten Format angezeigt.

WICHTIG: Wichtig wird zur Betonung signifikanter Angaben zu Vorgehensweisen verwendet.

Vorsicht: Ein Vorsichtshinweis macht Sie darauf aufmerksam, daß

Nichtbefolgung zu Software-, Hardware- oder Datenschäden führen kann.

Warnung: Eine Warnung weist Sei darauf hin, daß ernsthafte Körperverletzungsgefahr besteht.

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Avisos Especiales

Los siguientes avisos hacen hincapié en determinada informaciόn de la guía. Cada uno de ellos tiene un propόsito especial y aparecen con el formato siguiente:

IMPORTANTE: Importante se utilize para enfatizar cualquier informaciόn de procedimiento importante.

Precaucion: La precauciόn le ofrece información, que de no cumplirse, puede derivar en posibles daños tanto para el software y el hardware, como para ambos.

¡Advertencia!: Una advertencia es un aviso importante, que le advierte sobre la presencia de un inminente peligro.

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Raymar-Telenetics Customer Information

For service, if your unit is under warranty and/or you have a service contract:

Call 1-800-747-1522. When you call, please have the following information ready:

Item Location or Description

Model Number Front of unit. 3260, 3261, 3262, 3263, 3265, 3266,

3267, 3268. (For synchronous data compression models, specify SDC.)

Serial Number Bottom of standalone unit; edge of card unit.

Error message / Problem Description LCD Display.

Software Revision

LCD Display: from [Modulation Mode] 9600 T/D? press to display the operating status.

(Example: DTE 19.2 RELIABL.) Press until Display Modem ID displays.

Press .SWPart=x displays. The rightmost two digits show the revision level.

Option Settings Up-to-date configuration worksheet (see the 326X

Series Modem Reference Guide).

Site ID Assigned to the customer site by Raymar-

Telenetics at first service call. Customer should store the ID, once assigned.

Application Type Leased line with or without dial restoral or dial.

Also specify the data transfer protocol: asynchronous, direct-synchronous, or synchronous data compression (SDC) mode.

Connected hardware DTE type(s): asynchronous or synchronous

terminal or PC.

Please see the Return Materials Authorization (RMA) Procedure in this manual for more details.

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CHAPTER ONE – About the Modem

Introduction

This chapter summarizes the features and options of the 326X Series Modem. The series includes:

- The 326X V.32bis Series Modem, which operates in V.32bis modulation mode

- The 326XFAST Series Modem, which can operate in V.34 modulation mode

- The 326XFAST-SDC Series Modem, which can operate in V.34 modulation mode and the

Synchronous Data Compression mode

In this guide, references to the modem apply to all of the above, unless stated otherwise.

IMPORTANT: When you select a modulation mode, you must ensure that the Max Rate (AT*MX) and Min

Rate (AT*MN) parameter options are within the valid range for the mode.

The modem provides reliable data communication over 2-wire dial lines and 2-wire or 4-wire leased lines, depending on the model. Dial lines are public lines to which all telephone users have access; leased lines, also called private lines, provide a dedicated connection, over lines provided by the telephone company.

Whether you use dial or leased lines, you can operate the modem as follows:

- Using the front panel: control keys and liquid-crystal display (LCD)

- Using industry-standard (AT and AT&), and Raymar-Telenetics-enhanced (AT*) AT

commands from an attached terminal, or commands from an asynchronous communications software package running on an attached PC

- From a network management system (NMS)

- Using call establishment methods, such as V.25bis or LPDA2 automatic call units (ACUs)

Figure 1-1 shows desktop, or standalone, modems. The device is also available in high-density nest cards, which offer the same features, and can be installed in Raymar-Telenetics’ Modular Nest 9-slot and Modular Nest 21-slot rack-mounted enclosures.

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Figure 1-1. 326X Series Modem, Standalone Desktop Model

SAFETY AND OPERATIONAL NOTICES

Repair

Warning

Do not attempt to repair the modem or enclosure. They contain no electronic components that can be serviced or replaced by a user. Any attempt at user service of the 326X enclosure, or opening of the 326X unit, voids the product warranty.

Avertissement

N’essayez pas de réparer le modem ou le boîtier. Ils ne contiennent aucun composant électronique pouvant êtreréparé ou remplacé par un usager. Toute tentative de réparation du boîtier du 326X par un usager, ou toute intervention à l’intérieur du 326X, annule la garantie du produit.

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Warnung

Versuchen Sie nicht, das Modem oder sein Gehäuse zu reparieren. Es sind keine durch den Benutzer wartungs- oder austauschfähige Teile darin enthalten. Bei jeglichem Öffnen oder Wartungsversuch am 326X bzw.

Lightning

Warning

All Raymar-Telenetics devices should be used in environments designed for computers and electronic equipment. In areas susceptible to lightning, take precautions to prevent damage to electronic equipment. Contact your telephone company, or an electronic accessories vendor, for information on lightning protection equipment. Customers experiencing problems caused by surges from lightning have eliminated such problems by installing appropriate surge suppressors on power and data lines connected to Raymar-Telenetics devices.

Avertissement

Tous les dispositifs Raymar-Telenetics doivent être utilisés dans des environnements conçus pour des ordinateurs et du matériel électronique. Dans les zones susceptibles d’être frappées par la foudre, prenez des précautions pour éviter que le matériel électronique soit endommagé. Contactez votre compagnie téléphonique, ou un vendeur d’accessoires électroniques, pour obtenir des renseignements concernant les systémes de protection contre la foudre. Certains usagers confrontés à des problèmes causés par des sautes de tension dues à la foudre ont éliminé ces problèmes en installant des régulateurs de tension appropriés sur les câbles électriques et les câbles de données reliés aux dispositifs RaymarTelenetics.

Warnung

Raymar-Telenetics – Geräte sind grundsätzlich in für Rechner und elektronische Anlagen vorgesehenen Umgebungen zu verwenden. In unwettergefährdeten Bereichen ist jegliche Elektronik gegen Blitzeinwirkung zu schützen. Näheres über entsprechende Schutzeinrichtungen erfahren Sie von Ihrer Telefongesellschaft oder einem Elektrohändler. Problem emit Spannungsstößen durch Blitzeinwirkung lassen sich durch Einbau von Überspannungsableitern in die zu Raymar-TeleneticsGeräten führenden Netz- und Datenleitungen beheben.

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OPERATING THE MODEM FROM THE FRONT PANEL

The front panel menus are organized functionally so that operation is easy for novice and advanced users.

Refer to Chapter 3, Getting Started, to learn about front panel operation.

SELECTING PROGRAMMED OPTION SETS

Option sets make it easy to use a modem with common applications, including:

• Asynchronous and synchronous answering

• Asynchronous and synchronous dialing

• Leased line with dial restoration operation

Four sets of options are stored in nonvolatile memory. If none is appropriate to an application, you can customize an option set, and save it in nonvolatile memory.

Refer to Chapter 4, Configuring the Modem, for more information on option sets.

AUTOMATIC CALLING INTERFACES (ACUs)

The modem supports three automatic calling interfaces (also known as Auto-Call Units). ACUs let you execute functions from a keyboard.

AT ACU

The asynchronous AT ACU is compatible with the industry-standard AT command set. AT Commands provide a standard modem communications interface, allowing you to configure and operate your modem from a terminal or PC keyboard.

Using the AT-compatible command set (AT and AT&), you can, for example, dial and receive phone calls. Raymar-Telenetics’ extended AT command set (AT*) includes other important parameters used in

configuring advanced modem features.

Refer to Chapter 3, Getting Started, and Chapter 5, Using the AT Automatic Calling Interface, to learn more about the AT ACU and AT command syntax.

V.25bis ACU

For sync or async auto-calling, use the ITU-T V.25bis compliant ACU. With either the AT or V.25bis ACU, you can store, dial, or change up to nine phone numbers in the modem’s electronic telephone book, directly from your terminal.

Refer to Chapter 3, Automatic Calling Interfaces, in the 326X Series Modem Reference Guide, for details.

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LPDA2 ACU

The LPDA2 feature lets you use IBM dial and leased line restoral applications with LPDA2 Dial and Disconnect commands. LPDA2 allows Netview and other IBM applications, like POS outbound dialing applications, to control dialing.

In dial applications, LPDA2 eliminates the need for additional ports and equipment that had been required to support external 801 auto-dialing equipment in IBM environments.

In leased line operation, while connected on the dial line, the modem can monitor for LPDA2 commands in the data stream. If the local modem detects an LPDA2 command, the frame that is being processed is aborted. This prevents the remote DTE from processing the command frame as valid data.

Refer to Chapter 3, Automatic Calling Interfaces, in the 326X Series Modem Reference Guide, for details.

MANAGING A MODEM

Integral Network Management by Raymar-Telenetics’ 9110, 9000-UX, and 9000-PC Network Management Systems (NMS) is standard. The NMS can configure, monitor, and control local and remote modem operation.

An NMS continuously polls modems to collect management information and check status. Network management traffic, including alarms, commands, events, and polling, is transported to remote modems on an in-band channel that does not disrupt user data traffic nor consume user bandwidth. The modem supports a daisy-chain network management interface, reducing the hardware required for connections.

Refer to Chapter 2, Installing the Modem, for instructions on installing and cabling a modem for use with Raymar-Telenetics’ Network Management Systems.

RESTORING DATA TRANSMISSION

For critical leased line applications that require backup, you can use Models 3261, 3263, 3266, or 3268 in a point-to-point configuration. If the leased line fails, these modems can automatically reroute data traffic through the public switched telephone network (PSTN) over a 2-wire dial line. This integral dial line restoral feature guarantees that data will keep flowing, minimizing network downtime.

ITU-T V.34 COMPLIANT MODULATION MODE

326XFAST and 326XFAST-SDC modems support the ITU-T V.34 compliant modulation mode. 326XFASTSDC modems offer the same broad set of features available in the 326XFAST modems, and let you take

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advantage of faster transmission speeds while providing highly reliable data transmission in full-duplex synchronous environments.

326XFAST modems have a line probing feature that optimizes performance on every connection by automatically choosing the optimum bandwidth, carrier frequency, and data rate.

V.34 Modulation Mode Characteristics

V.34 modulation mode characteristics are as follows:

Data Rate: 2.4, 4.8, 7.2, 9.6, 12.0, 14.4, 16.8, 19.2, 21.6, 24.0, 26.4, 28.8, 31.2, and 33.6 kbps

Baud Rate: 2400, 2743, 3000, 3200, and 3429. Some baud rates do not support all data rates.

Carrier Frequency: 1600, 1646, 1800, 1829, 1920, 1959, and 2000 Hz. Some baud rates do not support all carrier frequencies.

Modulation: V.34 is a four-dimensional trellis-coded modulation standard that uses precoding and pre-emphasis equalization schemes.

Compatibility in V.34 Modulation Mode

326XFAST Series Modems (operating in V.34 Auto modulation mode), are compatible with modems that do not support the V.34 modulation mode, by automatically negotiating the highest common modulation mode (e.g., V.32bis).

V.90 Compatibility: Release 8.1 software enables 326X modems to operate with V.90 modems in dial-up connections. With this software, 326X modems can communicate with V.90 modems and negotiate V.34 rates. The release does not provide 56 kbps rates for 326X modems, nor 326X rates higher than the V.34 33.6 kbps standard. An upgrade to 8.1 is not required for modems used only in leased-line applications.

SYNCHRONOUS DATA COMPRESSION (SDC) FEATURE

The 326XFAST Series Modem is available in a synchronous data compression (SDC) model. 326XFAST products offer all the features of the 326XFAST family, plus synchronous DTE rates at 72.0 kpbs or higher.

The 326XFAST-SDC Modem is an ideal alternative to costly digital services. Whether your application requires dedicated bandwidth, bandwidth on demand, synchronous dial-up, or dial backup, the 326X-SDC provides optimum throughput for all HDLC/SDLC-like environments, such as X.25, Systems Networking Architecture (SNA), Statistical Multiplexer, and Router networks.

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Refer to Chapter 4, Configuring the Modem, for details.

The synchronous data compression feature in the 326XFAST-SDC Modem is Raymar-Telenetics’ proprietary technology.

AUTOMODE/MULTIMODE FEATURE

Using Automode/Multimode, the modem can automatically negotiate the highest common modulation speed (within a modulation mode) with another modem.

REMOTE CONFIGURATION

Using the local front panel, an NMS, or local-modem AT ACU, you can configure a remote modem. You can also read the remote modem’s status snapshots and receive its configuration summary on a front panel or async terminal.

ERROR CORRECTION AND DATA COMPRESSION

The modem provides error correction and data compression in accordance with the V.42 and V.42bis ITU-TS recommendation. With V.42, modems automatically determine whether to use Microcom Networking Protocol (MNP) Level 4 or Link Access Procedure for Modems (LAPM) for error correction. Depending on the scheme negotiated, the modem uses MNP Level 5 or V.42bis data compression. The SDC modem uses LAPM with Raymar-Telenetics’ proprietary data compression technology.

SECURITY

The modem provides access security at two levels:

• Front panel

• Modem access

Front panel security lets you password-protect a modem from access by other users. This prevents unauthorized changes from being made to a configuration. Front panel security does not prevent you from using the modem.

You can also screen incoming calls so that unauthorized users cannot access a modem. This is accomplished with password and callback functions.

Appendix A explains how to configure security features.

STATUS SNAPSHOTS

The modem’s status snapshot feature lets you view a local or remotely controlled modem’s EIA signals and Raymar-Telenetics circuit quality monitoring system (CQMS) parameters, and view a configuration summary.

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CQMS parameters continuously estimate major line parameters without disrupting data traffic. Measurement of such selections as signal-to-noise ratio and receive level helps you to isolate causes of degraded network performance.

ADAPTIVE RATE SYSTEM

With the Adaptive Rate System enabled, the 326X Series Modem continuously optimizes its transmit speed within the V.34, V.32bis, V.32 (coded and uncoded), and V.22bis modulation modes. By constantly monitoring signal quality, the modem adapts to the optimum transmission rate allowed by line conditions, ensuring maximum throughput and efficiency.

TROUBLESHOOTING (V.54 AND V.22bis TESTS)

The modem supports a full range of ITU-TS V.54 and V.22bis compatible tests to help isolate and correct problems.

Refer to Chapter 6 for typical problems and ways to correct them. Chapter 6 also lists the supported diagnostic tests, and instructions for initiating and terminating tests using either the front panel control keys or AT commands.

For details on tests, refer to Chapter 4 of the 326X Series Modem Reference Guide.

COUNTRY-SPECIFIC INFORMATION

Telephone company regulations vary by country. Because of this, there are minor physical or operational differences among 326X Series Modem models.

Appendix C, Country-Specific Information, provides cabling, rear panel layouts, interface pinouts, and other modem features that are required or restricted by country regulatory agencies.

NET COMPLIANCE

This release of the 326X Series Modem complies with the European Telecommunication Standards Institute’s (ETSI) Net 20, 21, 22, 23, and 25.

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CHAPTER TWO – Installing the Modem

Introduction

This chapter describes how to install and connect a 326X Series Modem. In this chapter, you:

• Unpack the modem

• Choose an appropriate site to install the modem

• Familiarize yourself with the modem’s rear panel and connectors

• Connect the modem to a PC or other data terminal equipment (DTE)

• Connect the modem to a telephone handset (if appropriate) and to the dial/leased telephone line jacks

• Attach ferrite cylinders, if necessary

• Connect the modem to a Network Management System (NMS), if appropriate

• Turn on the modem and run the unit’s automatic self-test

IMPORTANT: Telephone company and governmental regulations vary by country. Your modem’s rear panel layout and cabling may vary from that shown in this guide.

Refer to Appendix C for a description of the modem rear panel and cabling; important safety guidelines for connecting the modem in your country; and regulatory restrictions and requirements.

To order cables, refer to Appendix B; then contact your Raymar-Telenetics sales representative for ordering information.

NOTE: If you are installing a 326X Series Modem card, refer to the addendum, 326X Series Modem Cards, shipped with your modem’s backplane.

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UNPACKING THE MODEM

The modem is wrapped in reusable shock-absorbent packing material. Save the carton and packing material for later reuse. Raymar-Telenetics supplies the items shown in Figure 2-1 with the modem (Note: CD-ROM with User Guide and relevant documentation is not shown).

Figure 2-1. Unpacking the Modem

If the equipment is damaged, contact the shipper. If you have further concerns about damaged or missing parts, contact your Raymar-Telenetics representative:

Raymar Information Technology, Inc. (916) 783-1951 7325 Roseville Road (800) 747-1522 Sacramento, California 95842 www.raymarinc.com

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ADDITIONAL EQUIPMENT REQUIRED

In addition to the items supplied with the modem, you may need the following:

• Communications Software Package

Many modem applications are controlled by communications software that supports serial communications. When connecting a modem to a terminal, communications software is unnecessary. (Refer to Chapter 3 and Chapter 4 for more information.)

• Serial Cable

A shielded, straight-through modem-to-terminal cable, data communications equipment (DCE) to data terminal equipment (DTE) cable, is required. The cable must have a 25-pin D male connector and a DTE connector.

For the modem-to-modem (or other DCE-DCE connection), use a crossover cable.

The cable must support the modem signaling your application requires. Select a cable based on your computer and the DTE pin assignments in Appendix B.

CHOOSING A SITE

Where you place the modem can affect its operation. To enhance performance:

• Install the modem in a clean, well-lighted area that is free from temperature extremes in dust.

• Do not place anything on top of a modem.

• Locate the modem no more than the EIA-recommended distance from a DTE and within 6 feet (1.83 m)

of a grounded AC power outlet.

• Do not place anything within 1 inch (2.54 cm) of either side of a modem. Also, to prevent overheating,

do not place a modem on its side.

Refer to Appendix C for site requirements for operating the modem in your country.

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CONNECTING THE MODEM

Rear Panel Connectors

Figures 2-2 and 2-3 show 3260/3265 and 3261/3266 standalone modem rear panels. The rear of the modem has the following connectors:

• Modular jacks for making:

— DIAL LINE and PHONE connections (3260/3265 Modems) or — DIAL LINE, PHONE, and LEASE LINE connections (3261/3266 Modems)

• One 6-position Dual Inline Package (DIP) switch. This switch “hard-configures” some operating

functions. When the modem is shipped from the factory, all switches are in the Off (up) position. DIP switch selections cannot be overridden by remote front panel configuration. Refer to Appendix C for DIP switch function details.

• Network Control (NC) IN and OUT ports for connecting to Network Management Systems (NMS)

• A DTE port for connecting to a PC or DTE

• An AC power receptacle to accept an AC line cord

• An AC power switch

Refer to Appendix C for a description of the modem’s rear panel. For information on 326X Series Modem Card backplanes (models 3262, 3263, 3267, and 3268), refer to the addendum, 326X Series Modem Cards, shipped with your backplane.

Figure 2-2. 3260/3265 Modem Rear Panel Layout

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Figure 2-3. 3261/3266 Modem Rear Panel Layout

Electrical Interfaces—EIA/TIA-232 and ITU-TS V.35

Caution

Ensure that the electrical interfaces of the equipment you connect to the modem are compatible. Incompatible interfaces may seriously damage the modem. Raymar-Telenetics makes no guarantee of the equipment’s integrity if you do not ensure that compatible interfaces are used. If your DTE has a different interface, you will need an external converter cable.

326X Series Modems have an EIA/TIA-232/EIA/TIA-562 electrical interface for connection to external equipment. For compatibility with DTEs that have a V.35 interface, the V.34-SDC Modem is also available with the optional ITU-TS V.35 Recommendation electrical interface.

The rear-panel DTE port is configured at the factory for either interface. Both interfaces are not available in a unit. Regardless of the interface, external DTEs are connected through the modem’s rear-panel DTE port.

NOTE: When operating with the V.35 interface, DIP switch S1 must be set to the off (up) position (see Figure 2-2 or 2-3).

To purchase a compatible cable, consult Appendix B.

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Operating at V.34 DTE Rates

To operate V.34 or V.34-SDC modems at DTE rates greater than 19.2 kbps, you must use cables that can handle the higher data rates. Refer to Appendix B for instructions on determining the correct cables to use.

Ferrite Cylinders

Ferrite cylinders or beads installed on cables filter out line disturbances. They are required on some 326X models in some countries, as described in this section.

Caution

Install cables with the ferrite end adjacent to the modem. The ferrite cylinder ensures that the unit operates in compliance with FCC RFI requirements.

Models 3261 and 3266 – Dial Line Connections

Two telephone cables with ferrite cylinders are included in the Model 3261 (U.S.A.) and the 3266 (Canada, Germany, U.K., and Japan) accessory kit. Connect the cables from the modem to 6- or 8conductor dial-line connections.

Install the telephone cable. Figure 2-4 shows the proper orientation. Figure 2-8, in the next section, shows how to connect the 3261/3266 modem.

Figure 2-4. Attaching Ferrite Cable to the Modem

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Models 3267 and 3268

Ferrite cylinders are required on:

• Both dial line cables and on DTE cables on the 3267 V.34 Modem

• Both audio (leased or dial) cables and on DTE cables on the 3268 V.34 Modems

• Power cables on Modular Nest enclosures populated with 3267 and 3268 V.34 Modems

• Network management cables on Modular Nest enclosures populated with 3267 and

3268 V.34 Modems

A cylinder is included with each cable that requires one. Follow the instructions below to ensure correct cylinder installation.

Installing a Ferrite Cylinder on an Audio or Network Management Cable

Do the following for each cable:

1) Snugly wrap the cable twice completely around the cylinder (Figure 2-5).

2) Set the cable into the cylinder cutouts.

3) Ensure that 1 to 1-1/2 inches of the cable protrude from the cylinder (on the end you insert into the

backplane connector).

4) Snap the cylinder closed. You can reopen and close it to reset the cable.

5) Insert the cable into the modem backplane connector (with the ferrite cylinder close to the backplane

connector).

Figure 2-5. Installing a Ferrite Cylinder on an Audio Cable

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Installing a Ferrite Cylinder on a DTE Cable

Do the following for each DTE cable:

1) Pass the DTE cable through the cylinder.

2) Set the cable into the cylinder cutouts.

3) Position the cylinder as close as possible to the plug you install on the backplane connector.

4) Snap the cylinder closed. You can reopen and close it to reset the cable.

5) Insert the cable into the DTE connector on the modem backplane connector, with the ferrite

cylinder close to the backplane connector.

Installing a Ferrite Cylinder on a Power Cable

Do the following for each power cable of a Modular Nest enclosure populated with 3267 and 3268 V.34 Modems.

1) Snugly wrap the cable once completely around the cylinder (Figure 2-6).

2) Set the cable into the cylinder cutouts.

3) Ensure that 1 to 1-1/2 inches of the cable protrude from the cylinder (on the end you insert

into the backplane connector.)

4) Snap the cylinder closed. You can reopen and close it to reset the cable.

5) Insert the cable into the Modular Nest enclosure connector (with the ferrite cylinder close to

the connector).

Figure 2-6. Installing a Ferrite Cylinder on a Power Cable

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Important Information about the Modular Nest Enclosure Front Door

Warning

For safety, the enclosure front door should remain closed and locked at all times unless you are installing, removing, or configuring product cards.

Avertissement

Pour des raisons de sécurité, la porte d’entrée doit être toujours fermée et

verrouillée, sauf lorsque vous installez, retirez ou configurez des cartes.

Warnung

Aus Sicherheitsgründen darf die Klappe auf der Vorderseite nur zum Installieren, Entfernen oder Konfigurieren von Produktkarten entriegelt und geöffnet werden.

¡Avertencia!

Por razones de seguridad, la puerta frontal deberá permanecer cerrada en todo momento, a menos que se proceda a la instalaciόn, extracciόn o configuraciόn de las tarjetas del producto.

Important Information about the Modular Nest Enclosure

This notice applies to cooling airflow around the Modular Nest unit.

Caution

Failure to properly arrange cables could impede cooling airflow, possibly resulting in damage to the equipment.

Mise en Garde

Un mauvais agencement des câbles risque d’empêcher une bonne ventilation et par conséquent de causer des dommages matériels.

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Vorsicht

Die inkorrekte Anordnung von Kabeln kann den Kühlluftstrom behindern und zu Geräteschäden führen.

¡Precaucion!

La disposiciόn defectuosa de los cables puede impedir el flujo de air frío, resultando en posibles daños para el equipo.

Cabling the Modem

This section explains how to connect the modem to:

1) A PC or DTE (asynchronous or synchronous terminal)

2) A dial telephone line

3) A telephone cable (between handset and modem)

4) A leased telephone line (if appropriate)

5) The power cord

6) Network management system cables (if appropriate)

For models 3260/3265, connect modem cables in the order shown in Figure 2-7.

For models 3261/3266, connect modem cables in the order shown in Figure 2-8.

Warning

The modem must be grounded through its electrical plug. If you cannot use the safety plug with your electrical outlet, consult a licensed electrician to ensure that the modem is properly grounded. Unplug the modem from the power outlet before having it serviced.

Avertissement

Le modem doit être mis à la terre lors de son branchement. Si vous n’avez pas de cartouche fusible, consultez un électricien pour assurer la mise à terre adéquate de votre appareil. Mettez-le hors tension avant de commencer toute réparation.

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Warnung

Das Modem wird normalerweise über den Stecker geerdet. Wenn Sie den Schuko-Stecker nicht an die Steckdoes anschließen können, wenden Sie sich an einen zugelassenen Elektriker, um sicherzustellen, daß das Gerät korrekt geerdet ist. Trennen Sie das Gerät vor dem Öffnen des Gehäuses vom Netz.

Figure 2-7. 3260/3265 Modem Cabling

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Figure 2-8. 3261/3266 Modem Cabling

Connecting the Modem to a Network Management System

326X Series Modems can be connected to the following Raymar-Telenetics systems:

• 9110 NMS (Figure 2-9)

• 9000-PC (Figure 2-10)

• 9000-UX (Figure 2-10)

Use the modem’s NC IN and NC OUT 8-pin DIN connectors for NMS connections.

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To connect multiple modems in a daisy chain configuration, refer to Figure 2-11.

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Figure 2-11: Connecting Modems in a Daisy Chain Configuration

To attach modem enclosure cards to an NMS, refer to the addendum, 326X Series Modem Cards, shipped with the modem backplane.

Turning on the Modem

The power cable connects the rear of the modem to a standard 115V outlet. After making other connections, plug the power cable into the modem, and then plug it into an outlet. Turn the rear panel power switch to the On (up) position.

When powered on, the modem automatically performs a self-test of internal circuits. The “Automatic Self-Test” section, next, describes this test and the front panel displays that can follow it.

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AUTOMATIC SELF-TEST

When you apply power to the modem, it automatically runs a self-test that checks for and identifies faults in the modem’s circuits. After displaying the message SELF-TEST, the front modem displays one of the messages shown in Table 2-1.

Table 2-1. Self-Test Messages

This Message … Indicates …

326X Initial

The modem is set to operate using factory default values.

326X Ready

No faults were encountered during the self-test. The modem is ready for operation.

[Error message]

A system fault was detected during the self-test.

Handling Error Messages

If the modem fails the self-test and displays an error message, do the following:

1) Record the message to assist in troubleshooting the modem.

2) Turn the modem off and then on again, and observe the front panel display. If the modem displays

326X READY, the earlier error message was probably caused by a temporary power line problem. Some line problems do not affect modem operation. If the modem continues to display an error message, contact Raymar-Telenetics Customer Support.

AFTER INSTALLING THE MODEM

Go on to Chapter 3, Getting Started, for information on how to configure and operate the modem.

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CHAPTER THREE – Getting Started

Introduction

This chapter has three parts:

• System Requirements for Software Upgrades

• Configuring and Operating the Modem

• Other Call Establishment Methods

SYSTEM REQUIREMENTS FOR SOFTWARE UPGRADES

This section explains the prerequisites for an upgrade to version 7.9 software. This section does not apply to new units with 7.8 or higher software installed.

A modem can be upgraded to Release 7.9 software only if it has Release 7.0, 7.5, 7.6, or 7.7 software.

CONFIGURING AND OPERATING THE MODEM

You can configure and operate the modem in several ways:

• From the modem front panel

• From a Network Management System (NMS)

• From the modem AT Automatic Calling Unit (ACU), if it is attached to an asynchronous “dumb”

terminal – a terminal without software – or to a PC running an asynchronous communications software package

Each of these is described in the sections that follow.

If You Are Unsure of Your DTE’s Data Format …

The DTE manual should tell you what data format – asynchronous or synchronous – it uses. Most PC applications use an asynchronous data format.

Using the Front Panel

You can configure and operate all modem functions using the front panel’s:

• Light-emitting diodes (LEDs)

• Liquid crystal display (LCD)

• Configuration menus

• Control keys

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Figures 3-1 and 3-2 show the stand-alone modem front panel. Figure 3-3 shows the enclosure card front

panel. Note the LCD, LEDs, and control keys.

NOTE: Information specific to enclosure card modems is covered in the addendum, 326X Series Modem Cards, shipped with the modem backplane.

IMPORTANT: To use the front panel keys, the modem must be connected to an AC power source, the

rear panel power switch must be turned on, and rear panel DIP Switches #3 and #6 must be set to the Off (up) position. See Chapter 2 for details.

Figure 3-1. Standalone 3260 Modem with Front Cover Closed

Figure 3-2. Standalone 3260 Modem with Front Cover Open

Figure 3-3. 3260 Modem Enclosure Card Front Panel

LEDs show the status of key DTE interface signals. If a communication problem occurs, LEDs can help you determine the cause. (Refer to Chapter 6 for a quick reference to problems and how to correct them.) Table 3-1 describes LED functions.

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Table 3-1. 326X LEDs

LED Name Description

TD Transmit Data Flashes when the modem accepts data from the

local DTE, to transmit.

RD Receive Data Flashes when the modem passes received data to

the local DTE.

RI/OH Ring Indicator/Off-Hook On when an incoming call is ringing, and when

the modem is off-hook and connected to the dial line.

CD Data Carrier Detect On when the local modem receives a carrier

signal (as defined by the current modulation mode) from the remote modem or when the DCD parameter=High

TR Data Terminal Ready On when a DTR signal from a terminal is

detected.

RC/NC Remote Control/Network Control Flashes to indicate that the modem is under

remote configuration (via front panel or AT ACU).

A/B A or B Enclosure cards only.

On when modem A front panel information is displayed. Off when modem B front panel information is displayed. To toggle between modem A and modem B front panels,

hold and then press .

ALM Alarm Enclosure cards only.

On when a test is in progress or a modem failure occurs. With the 3262/3267 Modem card, if one modem fails, the ALM LED lights and remains lit regardless of which modem front panel is being viewed.

Front Panel Display

The front panel has a 16-character alphanumeric LCD display (see Figure 3-2 or 3-3). You access the configuration menu tree through this display, too.

• Configure the modem

• Store and view telephone numbers

• Initiate and answer calls

• View status information

• Run online tests

• Enter passwords and network addresses

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Navigating the Configuration Menu Tree

This section describes the modem menu tree structure. It explains how to access parameters using the front panel control keys.

Menu Structure The menu structure consists of fifteen categories, which appear in capital letters.

Example: CONFIGURATION OPT’S.

Each category has parameters (example: Mode). Some parameters are configurable; others indicate modem and call status. Most parameters have selectable options. Options affect the modem’s operating characteristics.

You can view parameters and options in the front panel LCD display. If options can be set, the following indicators display:

• An equals sign (=) indicates the currently selected option of the parameter

• A colon (:) indicates that the displayed option is available but is not selected

Each parameter has a default option:

• Some defaults are determined by the assigned factory-preset option sets (preconfigured

option sets). These defaults are exclusive to an option set.

• Other factory options are not exclusive to an option set and they always have the same

default setting, regardless of which factory-preset option set you use.

Refer to Appendix A, Figure A-1, or to the Reference Card to see the complete menu tree structure, including the available and default options.

Setting Configuration Options from the Front Panel

The four control keys (Figures 3-2 and 3-3) let you access parameters and options. Table 3-2 describes control key functions.

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Table 3-2. Front Panel Keys

Keys Function

Return

Across

NOTES:

Steps up through the menu tree from a parameter to a category, or from a category to the default display. Example: from Test=, pressing Pressing

Steps through the parameters in a menu category.

again displays the default display, such as DATA 9600 T/D?

displays the TEST OPTS category.

1) If you hold the

or key down, it repeats until you stop pressing.

2) With the 3262/3267 Modems, to toggle between modem A and modem B front panels, hold while pressing

.

Keys Function

Down

Enter

NOTES:

3) If you hold the

Steps through categories (example: Data 9600 T/D?, TEST OPTS, MODULATION OPT’S), or, at a parameter within a category, scrolls through the options.

Selects an option and/or initiates an action. This key also serves as a Talk/Data “softkey,” allowing you to toggle between using a telephone and the modem to establish a telephone connection.

or key down, it repeats until you stop pressing.

4) With the 3262/3267 Modems, to toggle between modem A and modem B front panels, hold while pressing

.

Example: Accessing a Configuration Option

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Status Displays The Data 9600 T/D? category is the default display when the modem is powered-up or after the

modem has “timed-out” (i.e. the front panel control keys have not been used for at least five

minutes). The data rate (9600, in the display Data 9600 T/D?) is the current DCE (modem-tomodem) data rate. It varies with the speed at which the modems connect. The Data 9600 T/D? category serves three primary functions:

• “Talk/Data” Switch

• Operating Status Displays

• Option Sets/Dialing Options

Talk/Data Switch Pressing when Data 9600 T/D? is displayed toggles the modem between using:

• An external telephone to manually dial a telephone call

• The modem to dial a stored or unstored telephone number

Operating Status Displays The DTE19.2RELIABL and Phase Jitter subcategories let you view modem operating status.

Example: in the DTE 19.2RELIABL subcategory, pressing displays:

• Operating status messages

• DTE/DCE rate/status

• Error correction/data compression status

• EIA/TIA signal status

• Disconnect reasons

• The modem’s software revision level

• Circuit Quality Monitoring System (CQMS) parameter status

For details, refer to Appendix A. For details on status displays, refer to Chapter 1, AT Commands,

of the 326X Series Modem Reference Guide.

Option Sets/Dialing Options These status subcategories let you choose a preconfigured option set, and make other selections to determine how the modem will establish telephone connections.

For details on configuring option sets and other call establishment options in this category, refer to Appendix A.

Where Do I Go from Here?

When you are familiar with the front panel, configuration menu system, and control keys, refer to thefollowing:

• Chapter 4 for specific configuration instructions.

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• Appendix A to change parameter options, and to enter and dial a telephone number. The

Reference Card shows the complete menu structure.

• Chapter 6 for a discussion of typical problems and ways to correct them.

Using the Modem with a Network Management System (NMS)

Modem functions can be configured and controlled from an NMS. Refer to:

• The network management system documentation

• Appendix A for brief descriptions of parameter options and features

• The 326X Series Modem Reference Guide for detailed descriptions of parameter options and

features

Using the AT Automatic Calling Unit (ACU)

To connect the modem to an asynchronous terminal – a terminal without software- or a PC running an asynchronous communications software package, you use the modem’s AT Automatic Calling Unit (ACU) interface.

The AT ACU is compatible with:

• The industry-standard AT command set (AT and AT& commands)

• The Raymar-Telenetics enhanced AT command set (AT

commands)

*

AT commands define how the modem is configured, how it makes calls, and what test operations it performs. The AT command set lets you configure and operate modem options and features from the PC or asynchronous terminal keyboard.

Using the Modem with an Async Terminal

If you are connecting the modem to an asynchronous terminal, you can use the AT ACU to configure parameter options from the keyboard. Learn the AT command syntax in order to generate the appropriate AT commands.

Where Do I Go from Here? To continue configuring the modem from an asynchronous terminal, refer to:

• Chapter 4 for configuration instructions.

• Chapter 5 to learn AT command syntax.

• Chapter 6 for a discussion of common problems and how to correct them.

• Appendix A to change configuration options. The Reference Card shows the complete

menu structure.

(The modem also supports an ITU-TS V.25bis ACU for initiating calls from an asynchronous or synchronous DTE, described later in this chapter.)

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Using the Modem with a PC and Async Communications Software

When using the modem with a PC, you need communications or terminal emulation software.

Communications software acts as an interface – with pull-down menus or graphics – between your PC and modem, allowing you to perform modem operations from your PC.

It is unlikely that you will use AT commands directly to configure and test the modem. Some communications software, however, may not support all of the modem’s configuration options or may require you to issue commands to the modem directly.

Communications software packages that directly support the modem (where Raymar-Telenetics 3260 Modem, Codex 3260 Modem, or Motorola 3260 Modem is a selection within the package) support

the industry standard commands (AT, AT&) and the Raymar-Telenetics-enhanced commands (AT*), making more knowledge of AT command syntax unnecessary.

Communications software packages that offer a Hayes-Compatible selection do not support RaymarTelenetics-enhanced commands: (AT*). In this case, you may enter AT* commands yourself, if

required by your application.

Where Do I Go from Here?

If your communications software package supports a 3260 Modem (or a comparable 3260 selection), refer to:

• Chapter 4, the “Communications Software Package Operating Notes” section.

• Chapter 4, “Configuration Option Sets” section.

• Appendix A to change configuration options. The Reference Card shows the complete

menu structure.

If your package does not support all of the modem’s configuration options, or requires you to issue AT commands to the modem directly, refer to:

• Chapter 5 to learn AT command syntax.

• Chapter 6 to resolve problems that you have isolated to the modem.

• Communications software documentation.

If your package supports a Hayes-Compatible selection, refer to:

• Chapter 4, the “Communications Software Package Operating Notes: section.

• Chapter 5 to learn AT command syntax.

• For AT

configuration settings, refer to:

*

- Chapter 4, the “Configuration Option Sets” section.

- Appendix A to change configuration options. The Reference Card shows the complete menu structure.

• Chapter 6 to resolve problems that you have isolated to the modem.

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OTHER CALL ESTABLISHMENT METHODS

In addition to configuration and operation methods in this chapter, the modem supports other methods to establish and manage telephone connections:

• V.25bis ACU (for synchronous or asynchronous applications)

• NetView LPDA-2 ACU (for synchronous applications)

• IBM AS 400 (for synchronous applications)

• External Auto-Call Units such as the Bell 801C

These methods are described in the sections that follow.

V.25bis ACU for Sync or Async Applications

The modem supports an ITU-TS V.25bis ACU for initiating calls from an intelligent terminal, in synchronous or asynchronous formats, which supports:

• Addressed mode, to perform call-related tasks, such as storing phone numbers in memory,

dialing calls from memory, connecting/disregarding incoming calls

• Manual and direct call establishment methods. Direct mode lets you use DTR transitions

from DTE to establish calls. Manual mode lets you manually initiate and answer calls with a telephone and then transfer the call to the modem.

Where Do I Go from Here?

For more information on the V.25bis ACU, refer to Chapter 3, Automatic Calling Interfaces, in the 326X Series Modem Reference Guide. Programmers and System Developers should also refer to Chapter 3 for a programming guide describing asynchronous and synchronous data formats using the ASCII/EBCDIC character sets.

NetView LPDA-2 ACU for Sync Applications

The modem supports Link Problem Determination Aid (LPDA-2). LPDA-2 is the communications protocol between IBM host software and transmission devices for exchanging diagnostic and control information. LPDA-2 commands provide a means for an attached terminal to command the modem to dial a telephone number and report back if the call is successful or not successful.

Where Do I Go from Here?

For more information on using the LPDA-2 ACU, refer to Chapter 3, Automatic Calling Interfaces, in the 326X Series Modem Reference Guide for configuration information and for information on NetView’s LPDA-2 dialing commands.

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Sync Dialing from an IBM AS 400

The modem can be configured to operate as a synchronous originate modem with the IBM AS 400. The AS 400 supports switched operation with call origination via a V.25bis-compliant call establishment driver. In this type of application, the modem is driven by the APPC/APPN bitsynchronous protocol.

Where Do I Go from Here?

For more information on using the modem with an IBM AS 400, refer to:

• Chapter 4 for configuration instructions.

• Chapter 3, Automatic Calling Interfaces, in the 326X Series Modem Reference Guide

for details on bit-synchronous protocol frame formats and the V.25bis protocol.

External Auto-Call Units

The modem can be used with applications that support external dialers, such as the Bell 801C. Once an external dialer establishes a call, it passes control of the dial line to the modem by the MI/MIC control leads on the DIAL LINE connector. NOTE: This type of application is supported in Canada and the U.S.A. only.

Where Do I Go from Here?

For more information on external call units, refer to Chapter 3, Automatic Calling Interfaces, in the 326X Series Modem Reference Guide.

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CHAPTER FOUR – Configuring the Modem

Overview

This chapter explains how to configure the modem, in conjunction with Chapter 3, Getting Started. Read Chapter 3 before continuing. Then select an option:

• If the application requires a communications software package, read the section, “Communications

Software Package Operating Notes”.

• If you have previously installed the 326X in another application, the section “Preparing for Operation”

explains how to reinitialize the modem memory so it can be installed in a new application.

• To configure quickly, the 326X Series Modem offers four preconfigured option sets. Each option set is

tailored for an application and stored in the modem’s nonvolatile memory. Refer to the section “Configuration Option Sets” to determine if an option set is appropriate for your application.

• The following two sections provide examples of common 326X applications and tell you how to

configure the modem for each application. These sections will help you to configure the modem quickly.

• If you are unfamiliar with the AT command set or the modem front panel, refer to the section “Remote

Access Reset”, later in this chapter. Once this is done, you can use a remote modem to configure local modem.

If the modem is part of a network and you have a Network Management System (NMS) installed, consult your network manager for configuration information.

COMMUNICATIONS SOFTWARE PACKAGE OPERATING NOTES

This section provides information for configuring the 326X Series Modem to work with communications software packages.

Select the Modem’s Preconfigured Option Set 1

Configuring the Modem for Use with Communications Software

Option Set 1 (the modem’s factory default setting) is for use with communications software in asynchronous dial applications, where the AT ACU originates calls.

Refer also to:

• “Operating Notes” at the end of this section

• “Configuration Option Sets”

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What to Select in the Communications Software Package’s Modem Menu List

1) Select Raymar-Telenetics 3260 Modem, Codex 3260 Modem, Motorola 3260 Modem, or

another 3260 option from the package’s modem list. Packages that directly support the 326X Series Modem support industry-standard commands and Raymar-Telenetics-enhanced commands, making further configuration unnecessary.

2) If a 3260 option does not appear in the list, contact the software manufacturer for the latest

version of the package (which should have such an option).

3) Select a Hayes-Compatible entry. With this option, Raymar-Telenetics-enhanced commands

(AT*) are not supported.

4) Try operating the communications software. If you have problems, refer to the “Operating

Notes” section, next, and to Chapter 6, Troubleshooting Guide.

Operating Notes

Keep the following in mind when using the modem with communications software.

General Notes The information in this section applies to all 326X Series Modem platforms.

Selecting an Option Set

Option Set 1 was designed for use with asynchronous communications software packages. It is compatible with most communications software. Option Sets 2, 3, and 4 are intended for different applications and have different default settings. Select Option Set 1 when using a communications software package.

Establishing a Connection with Option Set 1

With Option Set 1, the modem operates as follows:

1) The modem attempts to establish an LAPM connection.

2) If the connection is unsuccessful, the modem attempts to establish an MNP connection.

3) If the previous connections are unsuccessful, the modem attempts a Normal mode connection

to the remote modem. All data that is sent to the modem’s attached computer terminal before the modem establishes a connection is lost.

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Auto Dialing and Answering in Option Set 1

When the modem is configured for Option Set 1, and the communications software package executes an auto dialing and answering operation, the modem automatically adjusts its baud rate to the communications software baud rate and parity. This rate remains constant during the established connection.

Direct Operating Mode

If you select Mode=Direct (EC/DC OPT’S category):

• Speed conversion and flow control are not supported. If the communications package

does not support speed detect, change the 326X’s modulation mode to Auto V.32, and after a connection is established, change the communications software rate to match the modem’s connection rate.

• If the communications package supports data rates higher than 9.6 kbps, set the modem’s

maximum rate (Max Rate, AT feature before placing or answering calls. Ensure that the package’s speed and the modem’s connection rate match when the connection is established. NOTE: Some communications software packages support the automatic speed detect feature, which automatically matches the modem’s baud rate with the software package’s baud rate.

Transferring a File

Refer to the communications package instructions for the procedure for transferring files using the communications software package’s supported protocols.

Ring Messages

Some communications packages wait for ring messages to be received before the modem answers incoming calls. The 326X Series Modem must be set to the communications software package’s baud rate before the package recognizes the ring message. Set DTE Rate, by the front panel or by issuing an AT command, when the modem is configured for autobaud operations.

Flow Control Requirements

• Flow control prevents buffer overflow when line disturbances cause frequent

retransmissions. See “AT*FL” (for the DTE) and “AT*MF” (for the modem) in Appendix A.

MX) to the higher rate and disable the adaptive rate

*

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If the communications package does not directly support the 326X Series Modem and you want to use the package’s file transfer method:

o If the communications package supports RTS/CTS flow control, enable it:

a) Set the modem to Flow=RTS/CTS b) Set the Modem Flow=Off c) Transfer data, using the instructions in the communications package.

o If the communication package does not support RTS/CTS flow control:

a) Set the modem to Flow=Off b) Set Modem Flow=Off c) Transfer data, using the instructions in the communications package.

o If the communications package supports the automatic speed detect feature, set

Max Rate to a value also supported by they software package. Set Speed Conver=Off. Set the modem’s adaptive rate parameter to Off.

326XFAST V.34 and 326XFAST-SDC Notes

The information in this section applies when operating at the higher DTE rates available with the 326XFAST V.34 and 326XFAST-SDC Series Modems.

• If the communications software package supports the higher terminal rates available with

these modems, and you want to use the package’s auto dial or auto answer features, set the modem’s DTE Rate (TERMINAL OPT’S category) to that of the package.

• Some communications packages do not let you select the higher rates available with the

326XFAST V.34 modem while using the package’s auto dial or auto answer functions. To take advantage of the higher DTE rates, do the following:

a) Set the package for Direct or Terminal mode. b) Select the higher speed of the package. c) Set the modem’s DTE Rate to match the package’s set speed. d) Use the AT command set to establish the connection.

• Some file transfer protocols offered by a communications package may not operate

properly when DTE Rate is greater than 38.4 kbps, because some serial ports cannot sustain data transmission at these rates.

If the Communications Software and Modem Do Not Operate …

If, after following the suggestions in this section, you cannot get the communications software package and modem to operate, refer to Chapter 6, Troubleshooting Guide. If you still cannot get the communications software package and modem to operate, contact your software vendor for assistance.

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PREPARING FOR OPERATION

The procedures in this chapter assume that you are installing the modem for the first time. If you want to reinstall the modem, perform the procedure(s) below to reinitialize the modem’s memory. NOTE: Reinitializing modem memory sets modem parameter options back to factory defaults (Option Set 1) and deletes stored telephone numbers from memory.

Reinitializing Memory from the Front Panel

1) Press twice. Press until the modem displays Reinit Memory.

2) Press . The modem displays Reinit Mem?

3) Press

to reinitialize modem memory.

Reinitializing Memory Using the AT&F Command

You can also reinitialize memory by entering AT&F<CR> from the terminal.

CONFIGURATION OPTION SETS

This section discusses the modem’s preconfigured option sets, in three parts:

• What is an Option Set?

• How to Configure an Option Set

• Option Set Defaults – 326X V.32bis, 326XFAST V.34, and 326XFAST-SDC

What is an Option Set?

Option sets are complete configurations, each tailored for an application and stored in memory. Option sets get the modem working quickly.

If an option set does not exactly suit your needs, pick the one that most closely matches your application, modify its settings, and save the changes in the modem’s nonvolatile memory (refer to Appendix A).

Table 4-1 shows V.32bis and V.34bis option sets. Table 4-2 shows SDC option sets.

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Table 4-1. Option Set Summary – 326X V.32bis and V.34 Modems

Application Option Set

Async dial applications in which you are using the AT ACU to originate calls to a central site (default option set) Sync central site auto-answer applications; no ACU 2 Sync calls to a central site 3 Async central site auto-answer applications; no ACU (Models 3260/62/65/67) 4 Leased line application with dial restoral; no ACU (Models 3261/63/66/68) 4

Table 4-2. Option Set Summary – 326XFAST-SDC Modems

Application Option Set

Async dial applications in which you are using the AT ACU to originate calls to a central site (default option set) Sync dial A/B restoral application 2 Sync dial only application 3 Sync leased line application with dial restoral; no ACU (Models 3261//63/66/68) 4

Option Set Descriptions – 326X V.32bis and V.34 Modems

Option Set 1 – Async Calls to Central Site Using the AT ACU

With Option Set 1, the modem communications over dial lines using an asynchronous data format. This option set is appropriate for home or office use where you plan to dial, for example, into a central-site computer, minicomputer, an electronic bulletin board, or a personal computer. When you first install the modem, it is set to power up with Option Set 1 as the factory default. The modem recognizes the standard AT Command Set and the Raymar-Telenetics-enhanced AT Command set.

To satisfy common asynchronous communications software packages, Option Set 1 holds several EIA 232-D (ITU V.24) control signals asserted (see Tables 4-1 and 4-2). The modem originates calls and answers incoming calls according to the setting of S-Register 0 (see the “S-Registers” section in Chapter 5 for more information).

At the beginning of each connection, the modem negotiates the highest common data rate with the remote modem set to its factory default setting or automode. The modem also uses the adaptive rate feature in the V.34, V.32bis, or V.32 modulation modes. This ensures maximum throughput when line quality is poor.

1

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Option Set 2 – Sync Answering Central Site Without an ACU

Option Set 2 satisfies the needs of a synchronous application where most calls are to a central site (see Table 4-1).

Because calls are received primarily at the central site, the modem is set to answer calls automatically. With DTR=108.2, the local DTE can control the DTR signal. This allows the local DTE to use DTR transitions to connect the modem to the central site at the beginning of transmission and disconnect it when transmission ends.

At the beginning of each connection, the modem negotiates the highest common data rate with the remote modem. The modem uses the adaptive rate feature in the V.34, V.32bis, or V.32 modulation modes. This ensures maximum throughput when line quality is poor.

Option Set 3 – Sync Calls to Central Site Using the V.25bis ACU

Option Set 3 satisfies the needs of a synchronous application, where the remote modems originate calls to a central site (see Table 4-1).

With Option Set 3, the modem originates calls with its V.25bis ACU. The DTR option is set to 108.2 so that the V.25bis ACU can manipulate the DTR signal. All other options in the ACU OPT’s category are set for a typical synchronous DTE.

At the beginning of each connection, the modem negotiates the highest common data rate with the remote modem. The modem uses the adaptive rate feature in the V.34, V.32bis, or V.32 modulation modes. This ensures maximum throughput when line quality is poor.

Option Set 4 – Async Answering Central Site Without an ACU (Models 3260/62/65/67)

Option Set 4 satisfies the needs of an asynchronous application where most calls are inbound (see Table 4-1).

Because calls are received primarily at the central site, the modem is set to answer calls automatically. With DTR=Discon, the local DTE can control the DTR signal. This allows the local DTE to use DTR transitions to connect the modem to the central site at the beginning of transmissions and disconnect it when transmission ends. The DTR signal from the DTE must be high for the modem to auto-answer. If the DTR signal is low, it does not answer incoming calls.

At the beginning of each connection, the modem negotiates the highest common data rate with the remote modem. The modem uses the adaptive rate feature in the V.34, V.32bis, or V.32 modulation modes. This ensures maximum throughput when line quality is poor.

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Option Set 4 – Sync Leased Line Applications With Dial Restoral (Models 3261/63/66/68)

Option Set 4 uses the modem’s leased line restoral feature. With this option set, the modem operates primarily on a leased line unless that line fails. If so, the modem automatically restores the connection over a single dial line. You must install a 326X Series Modem at both ends of the leased line to implement restoral operation.

Option Set 4 configures the modem for a general restoral application (see Table 4-1). The modem uses the adaptive rate feature in the V.34 or V.32bis Auto modes. This ensures maximum throughput when line quality deteriorates. If restoral criteria are met, the modem automatically reroutes data traffic through the public switched telephone network (PSTN) over a single dial line. At that time, the modem attempts to run at its maximum rate over the dial line, and falls back to lower speeds if required. After an hour, the modem returns to the leased line.

If you operate your modems in leased-line mode with Option Set 4, and one modem has software Revision 7.8 or 7.9, set the Fast Call parameter (AT

modems.

Option Set Descriptions – 326XFAST-SDC Modems

Option Set 1—Async Calls to Central Site

Option Set 1 in the 326X-SDC product functions the same as Option Set 1 above.

Option Set 2—Sync Dial A/B Restoral

Option Set 2 satisfies the needs of a synchronous point-to-point digital link restoral application (see Table 4-2).

With this option set, the Clock is set to External as network timing is provided by the DSU/CSU. NOTE: With this option set, (for Raymar-Telenetics and Motorola DSU/CSUs as well as non-Telenetics and non-Motorola DSU/CSUs), the DSU’s restoral configuration should be set to Timing =Internal.

With this option set, the local and remote modems are configured for SDC operation. The modems default to Fast Call =Lvl3, and use LAPM error correction with modified V.42bis data compression. Enable Option Set 2 in both the local and remote modems, and ensure that Mode (AT*SM) is set the same in both modems.

The modem uses the adaptive rate feature in the V.34 Auto modulation mode. This ensures maximum throughput when line quality is poor.

FC, Modulation Opts Menu) to Off in both

*

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Option Set 3—Sync Dial Only

Option Set 3 satisfies the needs of a synchronous dial application (see Table 4-2). With Option Set 3, the

modem provides the network timing (Clock=Internal). Select a data rate at which the modem communicates with the DTE, using DTE Rate (AT

DE). Consult the description in Appendix A.

*

With this option set, the local and remote modems are configured for SDC operation. The modems default to Fast Call =Lvl3, and use LAPM error correction with a modified V.42bis data compression. Enable Option Set 3 in both the local and remote modems, and ensure that Mode (AT*SM) is set the same in both modems.

With Option Set 3, DTR =108.1 so that an off-to-on DTR transition instructs the modem to connect to the telephone line. If the modem detects an incoming call, the call is connected. If the modem does not

detect an incoming call and Default Dial (AT*DA) is enabled, the modem dials the number specified. If Default Dial is disabled, the modem refers to the Modulation Mode option (AT*MM). If set to Answer, the modem goes off-hook and sends an answer-back tone. An on-to-off DTR transition disconnects the modem from the telephone line. If DTR is low, the modem does not auto-answer. DTR transitions govern how the modem answers and disconnects calls. All options in the ACU OPT’S category are set for a typical synchronous DTE.

The modem uses the adaptive rate feature in the V.34 Auto modulation mode. This ensures maximum throughput when line quality is poor.

Option Set 4—Sync Leased Line with Dial Restoral; No ACU (Models 3261/63/66/68)

Option Set 4 uses the modem’s leased line restoral feature. With this option set, the modem operates primarily on a leased line unless that line fails. If so, the modem automatically restores the connection over a single dial line. You must install a 326XFAST-SDC Modem at both ends of the leased line to implement restoral.

Option Set 4 configures the modem for a general restoral application (see Table 4-2). The modem uses the adaptive rate feature in the V.34 Auto modulation mode. This setting ensures maximum throughput when line quality deteriorates. If restoral criteria are met, the modem automatically reroutes data traffic through the public switched telephone network (PSTN) over a single dial line. At that time, the modem attempts to run at 28.8 kbps over the dial line, and falls back to lower speeds if required. After an hour, the modem returns to the leased line.

With Option Set 4, the modem provides the network timing (Clock =Internal). Select a data rate at which the modem communicates with the DTE, using DTE Rate (AT*DE). Refer to the description in Appendix A.

In this option set, the local and remote modems are configured for SDC operation. The modems default to Fast Call =Lvl3, and use LAPM error correction with modified V.42bis data compression. Enable Option

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Set 4 in both the local and remote modems, and ensure that Mode (AT modems.

Refer to “326X V.32bis and 326XFAST Modem Application Examples” below.

If you operate your modems in leased-line mode with Option Set 4, and one modem has software Revision 7.8 or 7.9, set the Fast Call parameter (AT*FC, Modulation Opts Menu) to Off in both modems.

Configuring an Option Set

This section describes how to configure and save an option set.

From the Modem Front Panel:

1) Read “Preparing for Operation,” earlier in this chapter.

2) Identify the option set for your application. The default is Option Set 1.

3) Display SELECT OPTIONS on the front panel (refer to Chapter 2 to review

the function of front panel control keys).

4) Press until the modem displays SELECT OPTIONS: n, where n =1-4.

SM) is set the same in both

*

5) Press to select an option set. The modem displays SELECT OPTIONS= n.

Using the ATZ Command:

1) Read “Preparing for Operation,” earlier in this chapter.

2) Identify the option set for your application. The default is Option Set 1.

3) Type ATZ n <CR>, where n =1-4. NOTE: The modem disconnects from the line when the ATZ command is entered, and any

test in progress is immediately terminated. Since any AT command following the ATZ command is ignored by the modem, make sure ATZ is the last command entered in the command string.

To create a customized option set:

Using the AT&W Command:

1) Using the ATZ n command, select an option set n that most closely suits the application.

2) Use AT commands (see Appendix A) to change parameter options. For example, to change

RTS/CTS delay from its time in S-Register 26, to 15 ms, enter AT*DL1<CR>. The front panel displays OK .

3) Enter AT&Wn , where n specifies the address (option set) where the new customized option set is stored. The front panel displays SAVING OPTIONS .

4) After a few seconds, your modifications are stored in the modem’s nonvolatile memory, and the modem front panel displays SAVE COMPLETED!

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5) Do not turn off modem power until SAVE COMPLETED! appears.

From the Modem’s Front Panel:

1) Identify the option set that most closely suits the application. The default is 1.

2) Display the option(s) you want to modify using

and . For example, to change Max Rate

from 2400 to 7200, display Max Rate:7200. Press

. The display flashes three times and the colon changes to an equals sign. The new

option is temporarily saved and Max Rate=7200 displays.

3) Step across the Status/Option Sets/Dialing menu by pressing

until you see:

Save Changes=n.

4) Use the

key to display the option set number where you want the changes saved, and then

press . The modem displays Saving Options.

5) After a few seconds, the modifications are stored in the modem’s nonvolatile memory, and the modem displays SAVE COMPLETED!

6) Do not turn off modem power until SAVE COMPLETED! appears.

Option Set Defaults

Table 4-3 summarizes option set defaults for 326X V.32bis and 326X V.34 modems.

Table 4-4 summarizes option set parameter defaults for 326X V.34-SDC modems.

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326X V.32bis and 326XFAST MODEM APPLICATION EXAMPLES

This section provides application examples for each option set, and notes options you may need to change from factory default settings for each option set.

For This Type of Application … Select …

The modem connected to a remote terminal dialing into an asynchronous host computer (VAX, for example) The modem connected to a remote PC dialing into a LAN (remote node and remote control application) Remote X-Terminal dialing to a UNIX workstation or PC into a central site (for example, a UNIX-based terminal server or mini-computer) The modem connecting LANs dial-up router/bridge Option Set 1 The modem connected to a terminal calling an X.25 network or an electronic bulletin board Option Set 1 The modem as an answer modem connected to one of the following:

• A Front End Processor (FEP) or host computer

• An X.25 host/node

• Asynchronous router/bridge

Cluster controller calling a host computer Option Set 3 Synchronous terminal calling a host computer Option Set 3 Router/bridge calling another router/bridge Option Set 3 X.25 node/host computer calling another X.25 node/host computer Option Set 3 The modem as an external restoral device for leased line failure Option Set 3 Bandwidth on demand for leased line applications Option Set 3 Synchronous Dialing from an IBM AS 400 Option Set 3 The modem as an answer modem connected to one of the following:

• An electronic bulletin board

• An asynchronous host computer

• A terminal server

• An asynchronous dial-up router/bridge

The modem connecting routers/bridges on a leased line Option Set 4

The modem connecting an FEP to a cluster controller Option Set 4

The modem connecting two FEPs Option Set 4

X.25/statistical multiplexer internodal with dial restoral Option Set 4

Option Set 1

Option Set 2

Option Set 4 (Models 3260/ 62/65/67)

(Models 3261/ 63/66/68)

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Option Set 1 – Async Calls to Central Site Using AT ACU

Depending on application requirements, you may need to change the following:

(Refer to Appendix A for parameter and setting descriptions.)

Changing Default Configuration Settings

• Buffer Delay (AT

DB, EC/DC OPTS category), when enabled, allows buffered data in the

*

communications link to be effectively transmitted to the other modem before the modems disconnect. Enable this feature if your application does not ensure a complete transfer of data before the modems disconnect.

• When the 326X is configured for Option Set 1: if you do not use the AT ACU to send commands

to operate the modem, you must customize the DTE port by selecting these options:

o DTE Rate. Set the modem’s DTE rate to match the asynchronous DTE’s rate using the

DTE Rate option (AT

DE, TERMINAL OPTS category).

*

o Parity. Set the modem’s parity to match the parity set in the asynchronous DTE using the

Parity option (AT

RP, ACU OPTS category).

*

o Character Length. Set the modem’s character length (Char Length, ACU OPTS

category) to match the length set in the asynchronous DTE.

• In Option Set 1, the default settings assume you will use the AT ACU to operate the modem (for

example, the default for ACU Select=AT; EIA signals are set high.) If you plan on using DTR transitions (“DTR Dialing”) to signal the modem to make a call (rather than AT Commands), do the following:

1. Set Default Dial=1 (AT*DA, ACU OPTS category).

2. Store a number in memory location 1 (using Enter Phone #, AT&Z, 9600 T/D?

category).

3. Set DTR=108.1 (AT&D, TERMINAL OPTS category). When DTR is raised, the

modem will dial the specified call.

• If the DTE does not require EIA signal pins to be held high, adjust the EIA settings (TERMINAL

OPTS category) to match your application requirements.

• In Option Set 1, the modem is set for XON/XOFF (software) flow control. If your application

requires hardware flow control, change the Flow setting (AT

FL, TERMINAL OPTS category).

*

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Option Set 2 – Sync Answering Central Site Without ACU

Changing Default Configuration Settings Depending on application requirements, you may need to change the following:

• In Option Set 2, the default for network timing is Clock=Internal (AT&X, MODULATION

OPTS category). It may be necessary to change the timing to external or loopback, depending on the network clocking source.

• In Option Set 2, the default for ACU Select=None. If you want an ACU to operate the modem,

select an ACU and a data format.

• Customize the DTE port as follows:

- Set the modem’s DTE rate to match the synchronous DTE’s rate using DTE Rate (AT

DE,

*

TERMINAL OPTS category) (refer to Appendix A for parameter and setting descriptions.)

• The default Answer option is country-specific. Refer to Appendix C to verify that this option is

appropriate for your application.

• If the DTE does not provide DTR, the modem will not automatically answer an incoming call.

Set DTR=High (AT&D, TERMINAL OPTS category).

Option Set 3 – Sync Calls to Central Site, V.25bis ACU

Changing Default Configuration Settings Depending on application requirements, you may need to change the following:

(Refer to Appendix A for parameter and option descriptions.)

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• In Option Set 3, the default setting for network timing is Clock=Internal (AT&X,

MODULATION OPTS). It may be necessary to change the timing to external or loopback, depending on the network clocking source.

• In Option Set 3, the default setting for ACU Select=None. If you want an ACU to operate the

modem, select an ACU and a data format.

• Customize the DTE port by selecting this option:

Set the modem’s DTE rate to match the synchronous DTE’s rate using the DTE Rate option

DE, TERMINAL OPTS).

(AT

*

• If you plan on using DTR transitions (“DTR Dialing”) to signal the modem to make a call (rather

than issuing commands from an ACU), do the following:

1. Set Default Dial=1 (AT*DA, ACU OPTS category).

2. Store a number in memory location 1 (using Enter Phone #, AT&Z, ATAT 9600 T/D?

category).

3. Set DTR=108.1 (AT&D, TERMINAL OPTS category). When DTR is raised, the

modem will dial the specified call.

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Synchronous Dialing from an IBM AS 400

The modem operates as a synchronous originate modem with the IBM AS 400. Set the modem to Option Set 3 – no reconfiguration from this Option Set is necessary. The AS 400 supports switched

operation with call origination via a V.25bis compliant call establishment driver. Using Option Set 3 allows it to be driven by APPC/APPN, the bit-synchronous protocol supported by the IBM AS 400.

In an AS 400-to-400 (mainframe-to-mainframe) environment, the setting of the Calling Number parameter is critical to ensure the AS 400 operates properly with the modem. Rather than entering the phone numbers you will be calling, set CALLNBR to *NONE. This setting allows you to properly utilize V.25bis commands.

Chapter 3, Automatic Calling Interfaces, in the 326X Series Modem Reference Guide, describes bitsynchronous protocol frame formats.

Option Set 4 – Async Answering Central Site without ACU (Models 3260/62/65/67)

Changing Default Configuration Settings Depending on application requirements, you may need to change the following:

• The Buffer Delay feature (AT*DB, EC/DC OPTS category), when enabled, allows buffered data

in the communications link to be effectively transmitted to the other modem before the modems disconnect. Enable this feature if your application does not ensure a complete transfer of data before the modems disconnect.

• The default Answer option is country-specific. Refer to Appendix C to verify that this option is

appropriate for your application.

• In Option Set 4, the default option for ACU Select=None. If you want an ACU to operate the

modem, select an ACU and a data format.

• If you do not use the AT ACU to send commands to operate the modem, customize the DTE port

as follows:

o Set the modem’s DTE rate to match the asynchronous DTE’s rate using DTE Rate

DE, TERMINAL OPTS category).

(AT

*

o Set the modem’s parity to match the parity set in the asynchronous DTE using Parity

(AT*RP, ACU OPTS category).

o Set the modem’s character length, using Char Length (ACU OPTS category) to match

the character length in the asynchronous DTE.

(Refer to Appendix A for parameter and setting descriptions.)

• In Option Set 4, the modem is set for XON/XOFF (software) flow control. If your application requires hardware flow control, change the Flow option (AT*FL, TERMINAL OPTS category).

• If the DTE does not provide DTR, the modem will not automatically answer an incoming call.

Set DTR=High (AT&D, TERMINAL OPTS category).

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Option Set 4 – Synchronous Leased Line Applications with Dial Restoral (Models 3261/63/66/68)

Changing Default Configuration Settings Depending on application requirements, you may change the following options:

• The default Restoral setting in Option Set 4 (leased line models) is Auto/FP. When first

configuring the modem, set Restoral=Off. This prevents erroneous status errors from displaying while you configure leased line options. After configuration, if your application requires automatic initiation of dial restoral, set Restoral=Auto/FP.

• When installing the modem in a leased line application, the default Mode setting (AT*CA,

MODULATION OPTS category) is Answer. For proper operation, you must set Mode=Answer in one modem, and Mode=Originate in the other modem.

• Depending on application requirements, you may change the following: o Line (MODULATION OPTS). Default option is 2W Lease. Can also be set for 4W

Lease application.

o No ACU Form (ACU OPTS). Default option is Sync. Can be set to Async. o Answer (ACU OPTS). Default option is country-specific. Refer to Appendix C to verify

that this option is appropriate for your application.

o Restoral (RESTORAL OPTS). Default option is Auto/FP (as described above). Can be

set to OFF to disable restoral.

o Clock (MODULATION OPTS). Default option is Internal. Can be set to external or

loopback, depending on the network clocking source.

o DTE (TERMINAL OPTS). If No ACU Form=Async, customize your DTE port by

selecting these options:

 Set the modem’s DTE rate to match the asynchronous DTE’s rate using DTE

Rate (AT*DE, TERMINAL OPTS category).

 Set the modem’s parity to match the parity set in the asynchronous DTE using

Parity (AT*RP, ACU OPTS category).

 Set the modem’s character length to match the character length set in the

asynchronous DTE, using Char Length (ACU OPTS category).

(Refer to Appendix A for parameter and setting descriptions.)

326XFAST-SDC MODEM APPLICATION EXAMPLES

This section provides application examples for each SDC option set, and notes options you may need to change from factory default settings for each option set. This section includes the following:

- SDC Pre-Operation Notes – read this before configuring the modem

- Configuring The Modem for SDC Operation – configuration options that are critical to

ensure optimum network performance on an SDC connection

- SDC Sample Applications – examples of common SDC applications

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SDC Pre-Operation Notes

This section contains important information for using the 326XFAST-SDC Modem in SDC operating mode. Read this section before configuring the unit.

Operational Requirements

• 326XFAST-SDC modems require framed HDLC/SDLC-like data. NOTE: BER tests do not

operate in an SDC environment because the data is not framed.

• 326XFAST-SDC modems support an NRZ or NRZI data encoding method. Refer to the

DTE documentation for information on the data encoding method the DTE supports. (Refer to Appendix A, Data Form [AT*DF] option, for details on NRZ/NRZI data encoding methods.)

Optimizing Network Performance

The 326XFAST-SDC modem provides front panel displays of RX/TX Throughput and Link Utilization. Higher values indicate more efficient utilization; lower values indicate less efficient usage. These values are affected by the attached DTE and protocol characteristics – frame size, window size, and DTE rate selected.

(Refer to Chapter 1 of the 326X Series Modem Reference Guide for a description of how to use the RX/TX Throughput and Link Utilization displays.)

Raymar-Telenetics recommends the following to maximize efficiency:

• If your application is operating in a windowed protocol environment, set the window sizes to

greater than 1 to improve performance. Recall that windowing refers to the number of packets sent before an acknowledgement is required.

• To improve network performance, adjust frame sizes. The optimum frame size for most

applications is between 128 and 1024 bytes. Experiment with window and frame sizes for maximum performance.

• If link utilization is low, raise the DTE rate. Low link utilization typically implies that the

DTE equipment is the bottleneck in data transmission.

Configuring the Modem for SDC Operation

You can configure the 326XFAST-SDC Modem for SDC in one of these ways:

- Select Option Set 2, 3, or 4 Leased, discussed below

- Configure the modem as follows:

 Select one of the reliable data transfer modes (Reliable, Auto Reliable, or Speed Auto

Reliable).

 Choose an Auto-Call Unit (ACU) – AT, V.25bis, LPDA, or None – using the ACU

Select option, ACU OPTS category.

 Select a bit-synchronous data format (depending on the ACU type).

Refer to Appendix A for additional information on each of these methods.

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Ensuring Optimum Network Performance in SDC Mode The following parameters are critical for ensuring optimum network performance:

FL)

*

FC)

*

DE)

TD)

• Fast Call (AT

• DTE Rate (AT

• Flow (AT

• TpDlyMin (AT

Table 4-4 shows 326X-SDC option set default settings.

Carefully note the following when configuring the modem for SDC operation:

• Fast Call. Both the modems must be configured the same in order to connect. If one of the

modems does not support Fast Call, change the default setting to Off.

• DTE Rate. For better link utilization and throughput, higher values than the default may be

appropriate. (Refer to the DTE Rate description in Appendix A.) Refer to “Optimizing Network Performance” in the preceding section for more information.

• Flow/TpDlyMin. The default options assume the DTE can accept nondisruptive clock

stoppage. For DTEs that cannot handle Rx/Tx clock stoppage without disrupting data, select a different option. In this situation, Raymar-Telenetics recommends that the default values not be used.

SDC Sample Applications

Single Channel Point-to-Point Digital Link Restoral (via A/B Switch)

SDC Option Set 1 – Async Calls to Central Site Using AT ACU

SDC Option Set 1 functions the same as described above for non-SDC modems. Refer to that section for application examples.

SDC Option Set 2 – Sync Dial A/B Restoral

When used as a dial backup device for a digital network, the SDC modem provides economical dial backup and/or disaster recovery, at synchronous speeds matching speeds available on the DDS circuit.

When used as a restoral device for Raymar-Telenetics and Motorola 35XX DSU/CSUs (Figure 4-1), select SDC Option Set 2 in the local and remote SDC Modems. This places the modems in external timing, as digital services typically provide the network timing.

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Note the following:

• With SDC Option Set 2 selected (for Raymar-Telenetics, Motorola, non-

Raymar-Telenetics, and non-Motorola DSU/CSUs), the DSUs’ restoral configuration should be set to Timing=Internal.

• In this case, the 326XFAST-SDC DTE Rate must be set to a constant rate as

provided by the network (defaults of 56/64 kbps).

• Enable Option Set 2 in both the local and remote modems, and ensure that

Mode (AT

SM) is set the same in both modems.

*

• The SDC modem supports single channel environments only. For example, the

SDC modem can restore Port 1 only of the 35XX device.

• The 35XX device, when initiating restoral, must be set to Normal mode (as the

35XX network management channel is virtually a time division multiplexed data stream which cannot be compressed with the SDC product).

• The SDC modem may have the ARS feature enabled. In this case, ARS

determines the link rate.

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Figure 4-2 shows a configuration using an external A/B switch. Network configuration (SDC Option Set 2) and operation is the same as with an internal switch.

SDC Option Set 3 – Sync Dial Only

In a typical dial application, a remote terminal dials the host for file transfers. This allows remote users to dial in as needed, with a higher throughput than formerly attainable over the PSTN. Alternatively, the DTE and host (Figure 4-3) could be nodal equipment (e.g. X.25 PADs, routers, bridges). In this configuration, the SDC modems are used for remote dial-up branch connectivity. This is useful for remote uploading or downloading data over the PSTN as needed.

Select SDC Option Set 3 for either of these applications.

Note the following:

• With Option Set 3, the modem provides the network timing (Clock=Internal).

• Specify the speed at which the modem communicates with the DTE using the DTE Rate

(AT*DE) option, to use a value other than the default. See the DTE Rate description in Appendix A.

• With Option Set 3, the modem originates calls with its V.25bis ACU. DTR is set to 108.1 so that

an off-to-on DTR transition instructs the modem to connect to the telephone line. If the modem detects an incoming call, the call is connected. If the modem does not detect an incoming call and you have enabled Default Dial (AT*DA), the modem dials the number specified. If the Default Dial (AT*DA) is disabled, the modem refers to the Mode option (AT

AC). If set to answer, the

*

modem goes off-hook and sends an answer-back tone. An on-to-off DTR transition disconnects the modem from the telephone line. If DTR is low, the modem does not auto-answer. DTR transitions govern how the modem answers and disconnects calls.

• If you want the V.25bis ACU to manipulate the DTR signal, set DTR =108.2. Other options in the

ACU OPT’S category are set for a typical sync DTE.

• Select SDC Option Set 3 in both the local and remote modems, and ensure that Mode (AT

SM) is

*

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set the same in both modems.

• The modem uses the adaptive rate feature in the V.34 Auto modulation mode. This ensures

maximum throughput when line quality is poor.

Bandwidth On Demand

Bandwidth on demand is often required to support sporadic peak loads. With the SDC modem, you can ensure full network availability and performance at low dial-up line costs, without having to prioritize users or applications.

Figure 4-4 shows a point-to-point digital link with Raymar-Telenetics 35XX DSU/CSUs connecting two routers over a DDS circuit. The SDC modems are also connected directly to the routers. During peak network access periods, the router is configured to signal the SDC modem to establish a dial connection through the PSTN. Users transparently bypass the digital link, using the 326XFASTSDC PSTN link to continue data transmission. As bandwidth demands subside, the dial call is dropped, and transmission resumes over the DDS link.

The SDC modem supports all industry-standard ACUs (AT, V.25bis, DTR dialing, and LPDA-2). Bandwidth on demand can be initiated/terminated under the control of the nodal equipment by a secondary port. NOTE: Nodal equipment must be configured for secondary port restoral/bandwidth on demand operation. Refer to the nodal equipment documentation for instructions on configuring for this application.

Select SDC Option Set 3 for a bandwidth on demand application. All operational information described in the preceding section, “SDC Option Set 3 – Sync Dial Only”, applies to this application.

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SDC Option Set 4 – Sync Leased Line with Dial Restoral; No ACU (Models 3261/63/66/68)

Point-to-Point Leased Line Application with Dial Restoral

Figure 4-5 shows a typical point-to-point leased line application, with SDC modems providing leased line and dial back-up for a bridge/router network. A Raymar-Telenetics Network Management System (NMS) is shown. This application could apply to any nodal equipment connections (e.g. bridges, routers, or X.25 PADs).

With the modem’s integral restoral capabilities, if leased circuit operation is disrupted, the modems restore the connection over a single dial line through the PSTN.

The modem uses the adaptive rate feature in the V.34 Auto modulation mode. This ensures maximum throughput when line quality deteriorates. If restoral criteria are met, the modem automatically reroutes data traffic through the PSTN. At that time, the modem attempts to run at its maximum rate over the dial line, and falls back to lower speeds if required. After an hour, the modem returns to the leased line.

Select SDC Option Set 4 for this application.

Note the following:

• The line configuration default of Option Set 4 is Two-Wire Leased Line.

• With Option Set 4, the modem provides the network timing (Clock=Internal).

• To specify a non-default rate at which the modem communicates with the DTE, use the DTE

Rate (AT

DE). See the DTE Rate description in Appendix A.

*

• Select SDC Option Set 4 in both the local and remote modems, and ensure that Mode

(AT*SM) is set the same in both modems.

• If operating with the Raymar-Telenetics or Motorola 6500

PLUS

that has the Link Back-Up

option, set DTR=108.2 (the default is 108.1 for 6500s without the Link Back-Up option).

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REMOTE ACCESS RESET

Remote access reset enables someone unfamiliar with the AT command set to quickly configure a local modem so that another modem can dial into it. Then you can use the remote modem to configure local modem options. Remote access reset configures the modem to:

• Answer an incoming call

• Accept a network management session

• Accept a remote configuration session initiated by the calling modem

• Disconnect a call if one is in progress

• End any test in progress

Operation

To select remote access rest, press and simultaneously for three seconds. Rmt Access Reset displays. The modem resets itself to settings that let it answer a call and be accessed by an NMS or remote modem. The modem may be dialed into and reconfigured. Stored phone numbers and saved option sets remain unchanged.

When Remote Access Reset Is Disabled

Remote access reset is not supported when the modem is attached to a network management system. If you select it in this situation, NETMAN ATTACHED! displays. To invoke remote access reset, set OverrideMode=On (NETWK CRTL OPT’S).

Remote access reset is not supported when the modem is password protected (i.e. when pressing and for three seconds displays PASSWD PROTECTED). To choose the remote access feature,

you must first unlock the modem, either from the front panel, or with the AT*PN (enter password) command.

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CHAPTER FIVE – Using the AT Automatic Calling Interface

Introduction

The 326X Series Modem supports an asynchronous AT Automatic Calling Interface (Auto-Call Unit or ACU), that is compatible with the industry-standard AT command set.

AT commands provide a standard modem communications interface, allowing you to configure and operate a modem from an asynchronous terminal or PC keyboard. AT commands define how the modem is configured, how it makes calls, and the test operations the modem performs. In addition to supporting industry standard AT commands, Raymar-Telenetics has developed an enhanced AT command set for the modem.

• Industry-Standard AT Command Set – AT and AT&

These commands, called action AT commands, are intended for immediate modem action and let you perform day-to-day operations, such as dialing and storing numbers from your asynchronous DTE. These AT commands do not cross-reference to the modem front panel.

• Raymar-Telenetics Enhanced AT Command Set – AT*

Using these Raymar-Telenetics AT extensions, you can also configure most modem options. These AT commands, called configuration AT commands, control the same options as in your modem’s front panel menu tree.

This chapter discusses:

• The AT Command Set

• Using AT commands

• Action AT commands

• S-Registers

For an alphabetized quick-reference list of AT commands, corresponding front panel options, and command functions, see Appendix A.

The 326X Series Modem supports two additional ACUs:

• V.25bis ACU, for asynchronous and synchronous applications

• LPDA2 ACU, for synchronous applications

For details, refer to Chapter 3 in the 326X Series Modem Reference Guide.

If you are using communications software, you normally do not use the AT command set directly. Your communications software will do this for you.

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WHAT IS THE ATTENTION (AT) COMMAND SET?

The AT command set is a collection of commands that let you configure a modem directly from an asynchronous terminal or PC keyboard. The characters AT are a prefix to the commands you issue to your modem. When you type AT, you are asking for the modem’s attention. For instance, to disconnect a telephone call, you type AT for attention and HO for on-hook (hang up).

You can also use AT commands to configure a remote modem (refer to Chapter 2, Front Panel Operation, of the 326X Series Modem Reference Guide for details).

What Role Does Communications Software Play?

Some communications software packages “interpret” AT commands with pull-down menus or graphics, making familiarity with the AT command syntax unnecessary.

Communications software packages that directly support the 326X Series Modem usually support all of the modem’s AT commands (the industry standard commands AT, AT&, and the Raymar-Telenetics-

enhanced commands AT*).

Communications software packages that support a Hayes-compatible selection do not support the Raymar-Telenetics-enhanced commands (AT*). You can enter these commands yourself to modify

option settings if required by your application.

Check the documentation included with your communications software package to determine whether you need to use AT commands directly.

USING AT COMMANDS

AT commands are accepted by the modem in command mode or escape mode.

• The modem is in command mode when it is disconnected from the telephone line.

• You can enter escape mode and issue AT commands during a connection (the escape sequence +++ is

described later in this chapter).

Entering AT Command Lines

To enter a single AT command line:

1. Enter the prefix AT: The characters AT (upper-case or lower-case, but not mixed) must begin the

command line.

2. Enter an AT command. For example:

 D instructs the modem to dial a call. H instructs the modem to hang up. A numeric

character (for example, 2) following an AT command instructs the modem to use a specific command option. If a numeric character is not indicated, the modem assumes the 0 (zero) option.

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3. End with a carriage return <CR>/

The exceptions to the above AT command line conventions are “A/” (repeat last command) and “+++” (the escape sequence). Responses (result codes) to AT commands always appear in upper-case.

To enter multiple AT commands on a single command line:

Multiple AT commands can be entered on a command line using a single AT prefix. The modem accepts up to 60 characters after the prefix. Spaces are not counted in the length. AT commands are interpreted in sequence in the command line until one of the following occurs:

• A <CR> is encountered

• An invalid command is encountered

• A command is encountered which causes the modem to reset, go off-hook, or enter a test

state

For example, you might enter:

on a single command line. This command disables Asynchronous Echo. It configures the Result Code Format to Verbose, and the Save Changes feature to Option Set 1. (These options and settings are described fully in Appendix A.)

Commands that are followed by a telephone number must be at the end of the line. However, if the semicolon dial modifier (;) follows a telephone number, the modem returns to command mode after dialing. Therefore, AT commands can be entered after a semicolon in a command string. NOTE: If an error occurs, AT commands prior to the error are executed; commands following the error are ignored.

If you enter an AT command that requires a postscript number and no number is entered, the modem defaults to a 0 setting.

AT Command String Examples

Table 5-1 provides AT command string examples and their ACU results.

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For Further Details on AT Commands

For a description of AT commands, and dial modifiers, refer to Appendix A.

Autobaud Feature

The modem automatically detects the speed and character format of the following AT commands issed from your DTE:

• AT

• at

• A/

• a/

This means that any AT command you issue to the modem will cause the modem to “Autobaud.” The exception is the lower-case “a/” and upper-case “A/”, from which only speed can be detected. When the a/ or A/ commands are issued, the modem assumes parity to be the same as that of the previous command.

NOTE: Autobaud does not operate when the modem is online in escape mode. Autobauding works at the following DTE rates (bps):

Table 5-2 summarizes the 10-bit-total character formats for autobauding. (Autobauding is valid only with 10-bit character formats.)

Result codes, such as RING, are sent at the last autobauded DTE speed and parity. CONNECT result codes are also sent at the last autobauded DTE speed, even if the call is established at a different speed. When the modem is turned on, the last autobauded speed is saved. Because parity is saved within option sets, the parity value that is saved in the power-up option set is the one that is active.

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The Escape Sequence – (+++)

The escape sequence is used when the modem is online and you need to enter commands to the modem without disconnecting. The escape sequence with guard time protects against losing the connection while you send commands.

NOTE: Autobaud does not operate when the modem is in escape mode. Once in command state, you can:

• Terminate a call

• Initiate and terminate a test

• Issue AT action commands

• Change your modem’s configuration

• Initiate a remote configuration session

• Read modem status using the AT*ST command

The escape state is entered by sending the escape character three consecutive times. The escape character is selectable as any ASCII character. Its value is stored in S-Register 2, and the default is “+” (decimal 43). To disable escape command detection, set S-Register 2 to a value greater than 127.

A guard time is used with the escape sequence. A guard time must precede and follow the sequence of escape characters to prevent the +++ characters from inadvertently placing the modem into command mode if they are transmitted in a message. If data is sent within the guard time, the escape sequence is not detected. The default guard time is one second.

The guard time specified by S-Register 12 also specifies the maximum time between the three consecutive escape characters. If more than the allowable time elapses between escape characters, the escape sequence is ignored. Setting S-Register 12 to zero disables the guard time, so that the rate at which you enter the escape sequence is not a factor.

To use the escape sequence with guard time:

1. Pause a bit longer than the guard time.

2. Send +++, ensuring the delay between +’s is less than the specified guard time.

When a valid escape sequence is detected, the modem responds with

OK

Do not send commands until the OK response has been received. A command that is sent too soon may not be interpreted correctly.

3. Pause again, a bit longer than the guard time.

4. Enter commands to the modem.

5. When you are ready to resume the call to the remote system, type ATO<CR>. The modem returns to the online state.

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When using error correction, if you “escape” from the data state to the command state, the modem buffers any data received from the remote site. When you return online (to data state), the buffered data is sent to the DTE.

Non-Configuration AT Commands

Most AT commands cross-reference to a front panel option. Some AT commands are intended only for immediate modem action. These commands allow you to perform a number of the important dayto-day modem functions, such as:

• Re-execute your last command

• Answer an incoming call

• Dial a telephone number

• Hang up

• Exit command mode, return to data mode

• Redial the last telephone number

This section addresses AT commands that do not cross-reference to a front panel option.

A/, Re-Execute Last Command

This command re-executes the last AT command string issued to the modem, including redialing a telephone number. To re-execute the last command, enter A/ but do not follow this command with <CR>.

The A/ command may be entered in either upper-case or lower-case characters. However, when entered in lower-case characters, the modem cannot use the autobaud feature to determine parity. The

modem continues to use the parity determined by the previous command. The AT*ZD (Dial Rstrct) AT command limits the A/ command.

The modem does not support auto-parity for this command.

ATA, Manual Answer

This command instructs the modem to go off-hook and send answer-back tone over the line. When the ATA command is used during an incoming call, the modem initiates the “answer” end of the modulation mode handshake sequence. DSR transitions from off to on when the answer-back tone is sent if DSR is not configured for the High setting. If the modem is using error correction, the error-

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correction link handshake takes place after the modulation mode handshake, and before DCD (if DCD is not configured for the High setting) transitions from off to on.

This command causes the modem to answer a call regardless of the contents of S-Register 0 (Ring Count to Answer On).

If the ATA command is issued while the modem is in escape mode or in remote configuration, the modem responds with:

ATD, Dial

To dial directly from the keyboard, enter ATD followed by the number you want to dial. For example:

The ATD command causes the modem to go off-hook, dial the number, and execute all dial modifiers in the dial string. The type of call progress message you see is controlled by the Call Progress (ATX) setting. The modem can dial up to 50 characters, including spaces.

In originate mode, if the ATD command is issued without a phone number, the modem goes off-hook. If ATD is issued while the modem is in escape mode or remote configuration, the modem responds

with:

NOTE: Any invalid characters inserted into the dial string will be ignored.

ATH, Hang Up

You may hang up the modem after entering the online escape mode by typing ATH or ATH0. Typing ATH1 while in command mode causes the modem to Busy Out until either the ATH command is

entered or the

key is pressed. NOTE: For busy out, make certain that the TELCO OPT’S Telco

option is set for RJ4MB.

ATI, Display Software Information

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The messages described above are displayed in addition to the “OK” sent when AT command processing is complete. NOTE: If this command is the last or only command in a command line, an additional “OK” message follows the above responses.

ATO, Leave Command Mode

This command can be used only when the modem is in the online escape mode, or after a “;” (semicolon) dial modifier in a dial string.

The user may leave escape mode and return to data mode by typing ATO or ATO0. If a retrain is desired while returning to data mode, ATO1 must be used.

If this command is issued while the modem is disconnected from the phone line, the modem responds with:

If this command is issued while the modem is in a remote configuration session, the modem responds with:

NOTE: If the ATO command is issued after a “;” (semicolon) dial modifier (return to command state after dialing), the modem trains as an originate modem.

AT*RD, Redial Last Number

You may redial a failed call n times using the AT successful connection is made, or until the call has been attempted n times. The AT

*RD command. The modem redials a call until a

*RD command

causes the modem to redial the last number dialed. So if an initial call fails, and the telephone number is linked to another number, the modem redials the linked telephone number.

S-Registers

S-Registers are memory locations for storing specific configuration and operating parameters. SRegisters typically contain timing, counting, ASCII characters, or command option values. While communications software generally insulates you from the need to alter S-Register settings, you may

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want to reconfigure or read the contents of an S-Register. This section describes how to read and change S-Register values.

This section is in two parts:

• The first part describes the AT commands used to display and change S-Register values.

• The second part describes S-Registers used by the modem.

Any S-Register that is not stored in memory is reset to its default value when you:

• Power up the modem

• Load a new Option Set

• Reinitialize memory

Displaying and Changing S-Register Values

This command displays the value of S-Register n, as stored in volatile memory.

If a “?” appears in the command string anywhere other than immediately following the S-Register number, the command displays the value of the last S-Register selected.

If you try to read the value of an unused S-Register, the modem displays OK.

Display S-Register Value (AT?)

This command displays the contents of the “selected” S-Register, as stored in volatile memory. The “selected” S-Register is the last S-Register that was accessed using an S-Register command or the ATSn command. The number must be within the S-Register’s specified range. On power-up, SRegister 0 is “selected.”

If you try to read the contents of an unused S-Register, the modem displays OK.

Change S-Register Value (ATSx=n)

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This command lets you change the value of an S-Register stored in volatile memory. n is the SRegister to change, and x is the value. x must be a number within the S-Register’s range.

If you try to change the value of an unused S-Register, the modem displays OK.

Change the S-Register Value (AT=x)

This command lets you change the value of an S-Register stored in volatile memory. The “selected” S-Register is the last S-Register that was accessed using an S-Register command or the ATSn command. x must be a number within the specified range for the S-Register. On power-up, S-Register 0 is “selected.”

If you try to change the value of an unused S-Register, the modem displays OK.

S-Register Descriptions

This S-Register specifies the ring on which the modem automatically answers a call. When set to 0, automatic answering is disabled, and calls must be answered manually. This register has no meaning unless Answer=Using S0 (ACU OPT’S).

S-Register 1 – Ring Count

This S-Register counts the number of rings in an incoming telephone call. If the modem is configured to answer (AT*AA, or Answer=S0), when S-Register 1’s value equals S-Register 0’s value, the modem answers the call. If no ring is received after a country-specific time (eight to 10 seconds), the counter is reset to 0.

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S-Register 2 – Escape Code Character

This S-Register determines the decimal value of the escape code character. The default setting, 43, translates to the ASCII “+” character. Values greater than 127 disable the escape function.

S-Register 3 – Carriage Return Character

This S-Register determines the decimal value of the carriage return character. The default setting, 13, translates to the ASCII <CR> (carriage return) character.

S-Register 4 – Line Feed Character

This S-Register determines the decimal value of the line feed character. The default setting, 10, translates to the ASCII <LF> (line feed) character.

S-Register 5 – Backspace Character

The S-Register determines the decimal value of the backspace character. The default setting, 08, translates to the ASCII <BS> (backspace) character. Values greater than 32 (except 127) disable the backspace function.

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S-Register 6 – Wait for Dial Tone

If Call Progress is set to 0, 1, or 3 (ATX0, ATX1, ATX3), and blind dial is selected, the modem does not look for a dial tone. Instead, the modem goes off-hook and waits for the number of seconds specified by S-Register 6 before blind dialing a telephone number (if Blind Dial is set to S6,

AT*BD2). This S-Register does not affect the wait dial modifiers W, w, or :.

S-Register 7 – Wait for Data Carrier

If Call Timeout (AT*TT) is set to S7, the value of S-Register 7 determines the number of seconds that the modem waits for a carrier signal from the remote modem after dialing or answering a call.

S-Register 7 also affects the dial modifiers @, W, w, and :.

Dial Modifier “@”

If Call Timeout (AT*TT) is set to S7, the value of S-Register 7 determines the length of time for which the @ dial modifier instructs the modem to detect five seconds of silence.

Dial Modifier “W”, “w”, and “:”

If the Dial Wait option (AT

*DD) is set to S7, the value of S-Register 7 determines the value of the

dial wait modifier. The dial wait modifier determines how long the modem waits for a second dial tone after the modem has dialed a number.

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S-Register 8 – Pause Time for Pause Delay Dial Modifiers

This S-Register determines how many seconds the modem pauses while dialing when it encounters a K, k, “,”, or < dial modifier. Pause Delay (AT*DP) must be set to S8 (AT*DP4) to use S-Register 8’s

setting. This S-Register also determines the time duration of the pause delay for the “,” character when used in

an AT command string. The modem pauses for the specified time before continuing to process the command string.

With the “,” k, K, or < dial modifier, if S-Register 8 is set to 0 or 1, the pause delay defaults to two seconds.

S-Register 10 – Carrier Loss Hang Up Delay

S-Register 10 determines how long, in 100 millisecond increments, data carrier must be lost before the modem hangs up. NOTE: This applies to V.22bis, B212, V.21, and B103 operation only. To use S-

Register 10’s setting, the front panel DCD Loss Dis option (AT

*CD) must be set to S10. Also, if S-

Register 10 is set to 255, the modem will not hang up because of a carrier loss. Setting the AT*CD (DCD Loss Disconnect option under the TERMINAL OPT’S menu) to S10

enables the DCE disconnect feature, for V.32, V.32bis, and V.34 modulation modes. For these modes, the S-Register 10 determines the length of time, in seconds, for the modem to disconnect when the remote modem goes on hook without sending a longspace or PSTN cleardown.

In Normal or Direct modes, S10 must be set between 1-9 seconds. For Reliable mode, S10 must be set between 1-8 seconds. These selections result in Disconnect in the specified time after the modem leaves data mode and starts to retrain. Values of S10 other than the ones specified above disable the DCE Disconnect feature.

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S-Register 11 – DTMF Tone Duration

S-Register 11 defines the duration/spacing of tones (in milliseconds) in Dual Tone Multifrequency (DTMF) dialing. This register has no meaning unless the Tone Length option under the DIALING OPT’S is set to S11. Refer to Appendix C, Country-Specific Information, for the ranges supported by each country.

S-Register 12 – Escape Code Guard Time

The S-Register sets the interval that must be present on either side of the escape code (+++) in order for the modem to recognize the escape command and enter command mode. This prevents the +++ characters from putting the modem in command mode if they are contained in data. The value of SRegister 12 is multiplied by 0.02 to determine the number of seconds. For example, the value of the factory default 50 is one second.

If S-Register 12 is set to 0, the speed at which you enter the escape sequence is not a factor.

S-Register 18 – Test Timer

This S-Register determines the duration, in seconds, of loopback tests. With S-Register 18 set to 0, the timer is not operational and tests must be terminated manually. NOTE: S-Register 18’s function is valid only when loopback tests are issued using the AT&T command. S-Register 18 cannot be used to automatically terminate loopback tests if the test is initiated from the front panel.

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S-Register 25 – Delay Before Looking for DTR

When DTR Delay=S25 (AT*DT), and AT Form=Sync Data (AT&M) or V25 Form=AsynSync, the modem goes into synchronous data mode after the modem dials synchronously. S-Register 25 lets you switch from an asynchronous DTE to a synchronous DTE without hanging up. S-Register 25 allows this switch by specifying how many seconds the modem waits after connecting before looking for DTR.

S-Register 26 – RTS/CTS Delay

This S-Register selects the delay between CTS and RTS while the modem is online. It operates in modes specified by the RTS (AT*RS) and CTS (AT*CT) commands.

The time is selectable in 1/100 second intervals, from 0 to 2.55 seconds.

S-Register 30 – DTE Inactivity Disconnect

If DTE Inactivity=S30 (AT*SI), the modem disconnects when data is not sent or received for an amount of time greater than the value stored in S-Register 30, multiplied by 10 seconds. Time-outs range from 10 to 2550 seconds (42.5 minutes). A value of 0 stored in S-Register 30 disables the DTE inactivity option.

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S-Register 38 – Disconnect Buffer Delay

S-Register 38 determines how long the modem processes buffered data when a disconnect is initiated. For S-Register 38 to affect the Delay option (AT*DB), Delay (EC OPT’S menu) must be set to “Buf

or S38” or “Buf & S38.”

S-Register 45 – Access Security Tone Duration

This S-Register specifies the prompt tone duration when the ACCESS SECURITY option Tone=Prompt Only or Prompt/Ack (AT*ZP). This delay is measured from the time that the prompt

tone is generated by the answer modem, to the time that the answer modem detects the first digit of the calling modem’s password.

S-Register 46 – Access Security Lead Digit Delay Timeout

This S-Register specifies the lead digit delay timeout when ACCESS SECURITY Tone (AT*ZP) is enabled.

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S-Register 96 – Signaling System #5

This S-Register specifies whether Signaling System #5 is enabled.

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S-Register 97 – Break Signal Duration

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S-Register 98 – AC Detect

This S-Register applies to V.32bis and V.34 operating modes. It enables and disables AC Tone Protect, which is part of the modem’s training sequence.

S-Register 99 – V.32 Training Time

This S-Register extends part of the V.32 modulation mode training time. It provides a workaround to an inability of Rockwell-based modems to establish a connection.

Raymar-Telenetics recommends that with Rockwell-based modems, you set S-99 to 120.

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CHAPTER SIX – Troubleshooting Guide

Introduction

Most problems encountered when installing and using the modem can be corrected if you carefully read and follow the instructions in the documentation. Use the Troubleshooting section of this chapter to analyze and correct problems before calling Raymar-Telenetics’ Customer Support Center.

The section after the troubleshooting guide tells you how to initiate and terminate tests. Chapter 4 of the 326X Series Modem Reference Guide contains detailed information on these tests.

Assumptions:

• The modem is set to factory default configurations.

• The modem has been installed with all initial cabling complete.

TROUBLESHOOTING

This section discusses:

- Dial operation problems

- Synchronous data compression (SDC) mode problems

- Leased line operation problems

The First Step

First, confirm that your data communications application is set up correctly:

• Confirm that your communications software is configured for the correct serial port to which your

modem is connected (i.e., COMM1, COMM2, etc.)

• Confirm the COM port is configured for the data rate, work length, and parity your configuration

requires

• Confirm that the cable connecting the modem to the host equipment is a DCE-to-DTE straight-

through cable

• Confirm the electrical interface of your modem (V.35 or RS-232) and ensure that you have the

correct cable installed

Troubleshooting Steps

Use the table that follows to match your problem with a diagnosis and solution.

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Raymar 326X V.34 Series, V.34-SDC, V.32bis SERIES, 326X V.34-SDC Series, 326X V.32bis Series User Manual

Specifications and Main Features

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