Avaya 8400B User's Guide

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8400B Plus Data Module

User’s Guide

555-020-709 Comcode 107893323 Issue 2 November 1996

While reasonable efforts were made to ensure

Notice

that the information in this document was complete and accurate at the time of printing, Lucent T echnologies can assume no responsibility for any errors. Changes and corrections to the information contained in this document may be incorporated into future reissues.

Your Responsibility for Your System’s Secu-

Toll fraud is the unauthorized use of your telecom-

rity

munications system by an unauthorized party, for exam-

ple, persons other than your company’s employees, agents, subcontractors, or persons working on your company’s behalf. Note that there may be a risk of toll fraud associated with your telecommunications system, and if toll fraud occurs, it can result in substantial additional charges for your telecommunications services.

You and your System Manager are responsible for the security of your system, such as programming and configuring your equipment to prevent unauthorized use. The System Manager is also responsible for reading all installation, instruction, and system administration documents provided with this product in order to fully understand the features that can introduce risk of toll fraud and the steps that can be taken to reduce that risk. Lucent Technologies does not warrant that this product is immune from or will prevent unauthorized use of common-carrier telecommunication services or facilities accessed through or connected to it. Lucent Technologies will not be responsible for any charges that result from such unauthorized use.

Lucent Technologies Fraud Intervention

suspect you are being victimized

need technical support or assistance, call Technical Service Center Toll Fraud Intervention Hotline at 1 800 643-2353.

by toll fraud and you

If you

Warranty Lucent Technologies provides a limited war-

ranty on this product. Refer to the “Limited Use Software License Agreement” card provided with your package.

CE Compliant The CE mark on this product indicates

technical compliance with the European Council EMC Directive 89/336/EEC.

Federal Communications Commission Statement: Part 15: Class A Statement

uration of 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 harmful interference when the equipment is operated in a commercial environment. This equipment generates,

The US Config-

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. Operation of this equipment in a residential area is likely to cause harmful interference, in which case the user will be required to correct the interference at his or her own expense.

Trade m ark s DEFINITY is a registered trademark of

Lucent Technologies. Hayes is a registered trademark of Hayes Microcomputer Products, Inc. Microsoft and MS-DOS are registered trademarks of Microsoft Corporation. Smartmodem is a trademark of Hayes Microcomputer Products, Inc.

Ordering Informa tion

Call: Lucent Technologies Publications Center

Voice 1 800 457-1235 Fax 1 800 457-1764 International Voice 1 317 361-5353 International Fax 1 317 361-5355

Write: Lucent Technologies Publications Center

P.O. Box 4100 Crawfordsville, IN 47933

Order: Document No. 555-020-709

Comcode 107893323 Issue 2, November 1996

You can be placed on a Standing Order list for this and other documents you may need. Standing Order will enable you to automatically receive updated versions of individual documents or document sets, billed to account information that you provide. For more information on Standing Orders, or to be put on a list to receive future issues of this document, please contact the Lucent Technologies Publications Center.

Disclaimer Intellectual property related to this product

(including trademarks) and registered to AT&T Corporation has been transferred to Lucent Technologies Incorporated.

Any references within this text to American Telephone and Telegraph Corporation or AT&T should be interpreted as references to Lucent Technologies Incorporated. The exception is cross references to books published prior to December 31, 1996, which retain their original AT&T titles.

Heritage Statement Lucent Technologies — formed as

a result of AT&T’s planned restructuring — designs, builds, and delivers a wide range of public and private networks, communication systems and software, consumer and business telephone systems, and microelectronics components. The world-renowned Bell Laboratories is the research and development arm for the company.

Acknowledgment This document was prepared by the

Product Documentation Development group, Lucent Technologies, Middletown, NJ.

8400B Plus Data Module User’s Guide

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Contents

Contents iii About This Document v

■ Purpose v

■ Organization of This Guide v

■ How to Order Documentation vii

■ How to Comment on This Document vii

■ Conventions Used viii

■ Security Issues ix

■ Lucent Technologies Fraud Intervention xiii

■ Related Documentation xiii

Important Safety Instructions xv

1 Introduction 1-1

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iii

■ Overview 1-1

■ Features 1-2

■ Physical Description 1-3

2 Installation 2-1

■ About the Terminal Device 2-1

■ Selecting the Correct Installation Procedure 2-2

■ Hardware Installation 2-8

■ Initial System Checks 2-11

■ Installation Options 2-12

■ Changing Installation Options 2-16

■ LED Indications 2-18

■ Selecting PC Communications Packages 2-21

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Contents

3 Configuration and Operation 3-1

■ Operating Modes 3-1

■ Issuing Commands 3-2

■ Configuration Parameters 3-7

■ Data Operation 3-10

■ Voice Operations 3-18

4 Troubleshooting 4-1

■ How to Use This Chapter 4-1

A AT Command Set A-1 B Dial Modifiers B-1 C S-Registers C-1 D Isolating Problems Using Loopback Data Tests D-1

■ Data Loopback Test D-1

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■ Local Loopback Test D-3

■ Local Loopback Test with Self-Test D-5

■ Remote Loopback Test D-7

■ Remote Loopback Test with Self-Test D-9

■ Loop-Around Data Test Arrangement D-11

E Quick-Reference Summaries E-1 GL Glossary GL-1 IN Index IN-1

8400B Plus Data Module User’s Guide

About This Document

Purpose

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November 19 96

About This Document

Purpose

The purpose of this guide is to provide information for installing, operating, testing, and troubleshooting the 8400B Plus Data Module.

Organization of This Guide

November 1996

The following paragraphs summarize the chapters and appendices contained in this guide.

■ Chapter 1, “Introduction,” discusses the basic operating features of the

8400B Plus Data Module and describes the external indicators and connectors.

■ Chapter 2, “Installation,” describes the hardware and software required

for installing the 8400B Plus Data Module, and outlines procedures for preparing the 8400B Plus Data Module for operation.

■ Chapter 3, “Configuration and Operation,” describes how to issue

commands to your 8400B Plus Data Module. In addition, it describes how to change, store, and recall configuration parameters, and outlines how to create and save custom configuration profiles. It also provides some basics on the operation of the 8400B Plus Data Module, outlines a typical on-line data session, and discusses more advanced command usage with example command lines. If you are not familiar with the AT

8400B Plus Data Module User’s Guide

About This Document

Organization of This Guide

command interface and you are not using your 8400B Plus Data Module with a PC communications package, you will need to familiarize yourself with this chapter.

■ Chapter 4, “Troubleshooting,” describes procedures for troubleshooting

problems that may be encountered while configuring and operating the 8400B Plus Data Module.

■ Appendix A, “AT Command Set,” contains an explanation of each AT

command accepted by the 8400B Plus Data Module.

■ Appendix B, “Dial Modifiers,” contains an explanation of each Dial

Modifier accepted by the 8400B Plus Data Module.

■ Appendix C, “S-Registers,” contains an explanation of each S-register

used by the 8400B Plus Data Module.

■ Appendix D, “Isolating Problems Using Loopback Data Tests,” provides

information on how to perform loopback tests and how to isolate problems using the 8400B Plus Data Modul e.

■ Appendix E, “Quick-Reference Summaries,” contains quick-reference

summaries of AT commands, S-registers, result codes, factory-default configuration settings, EIA/TIA-574 pin-outs, and the ASCII character set.

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A glossary and an index are provided at the rear of this guide.

8400B Plus Data Module User’s Guide

About This Document

How to Order Documentation

555-020-709

How to Order Documentation

This document’s order number is 555-020-709. To order this document:

Call: Lucent Technologies Publications Center

Voice 1 800 457-1235 Fax 1 800 457-1764 International Voice 317 361-5353 International Fax 317 361-5355

Write: Lucent Technologies Publications Center

P.O. Box 4100 Crawfordsville, IN 47933

November 1996

Issue 2

vii

For more information about Lucent Technologies documents, see

Communications Systems Publications Catalog

, 555-000-010.

Business

How to Comment on This Document

To comment on this document, please return the comment card at the back of the document.

8400B Plus Data Module User’s Guide

About This Document

Conventions Used

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Conventions Used

Throughout this guide, command lines that are typed are shown in typewriter-style characters, and responses that the 8400B Plus Data Module returns are shown in italics. The following is an example.

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AT H

ENTER

Note the following characteristics of the display representation:

■ The first line is a command line as it should be typed. The symbol,

ENTER

when shown, indicates that you must press the Enter or Return key to complete the command line.

■ Spaces are used to separate commands in some examples shown in this

guide. In actual use, the spaces may be typed, but they are not required.

■ The second line in the example shows a typical response returned by the

8400B Plus Data Module.

Throughout this document, toll fraud security hazards are indicated by an exclamation point inside a triangle and the words

Security Alert:

Security Alert

indicates the presence of a toll fraud security hazard. Toll

Security Alert

fraud is the unauthorized use of your telecommunications system by an

unauthorized party (for example, persons other than your company’s employees, agents, subcontractors, or persons working on your company’s behalf). Be sure to read “Your Responsibility for Your System’s Security” on the inside front cover of this book and ‘‘

Security Issues’’ on

page ix of this section.

8400B Plus Data Module User’s Guide

About This Document

Security Issues

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Security Issues

As a Lucent Technologies customer, you should be aware that there is an increasing problem of telephone fraud. Telephone toll fraud can occur in many forms, despite the numerous efforts of telephone companies and telephone equipment manufacturers to control it. Some individuals use electronic devices to prevent or falsify records of these calls. Others charge calls to someone

else’s number by illegally using lost or stolen calling cards, billing innocent parties, clipping onto someone else’s line, or breaking into someone else’s telephone equipment physically or electronically.

Today security problems are not just limited to toll fraud. There have been sharp increases in reported incidents of hackers: criminals skilled in reprogramming computer systems, accessing telecommunications systems through remote administration or maintenance ports. These ports cannot be used to place phone calls, but hackers can gain control over the setup of the system. Through these ports, hackers create security “holes” to allow unauthorized calling — a serious form of electronic vandalism.

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Maintenance ports are their most recent target of abuse. In this scenario, hackers find a private branch exchange (PBX) maintenance port number with their “war dialer”; a device that randomly dials telephone numbers until a modem or dial tone is obtained. They then “hack” the user ID and password, sometimes just by using the PBX default passwords, to enter your system.

This is the most dangerous type of abuse because, once in your system, the hackers have control over all the administrative commands. While in your system, they have been known to:

■ Turn on Remote Access or Direct Inward System Access (DISA).

Hackers have been known to change the system at 8:00 p.m. to allow fraudulent calls. Then, at 3:00 a.m., they reprogram the system back to its original configuration. One company was hit three weekends in a row before it realized what was happening.

■ Turn off Call Detail Recording (CDR) or Station Message Detail

Recording (SMDR), hack your system all weekend, then turn it back on before Monday morning. This is especially disturbing to managers who

8400B Plus Data Module User’s Guide

About This Document

Security Issues

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are security conscious and check the CDR/SMDR reports every morning looking for suspicious activity. They will not see records of the calls because CDR/SMDR was turned off by the hackers. The administrator may notice the absence of CDR/SMDR records for evening, night, and weekend calls made by employees.

NETCON Data Channels

The NETCON (Network Control) data channels provide internal access to the

system management capabilities of your DEFINITY® Communications System. If the 8400B Plus Data Module is connected to a modem, or there is a modem pool, your system may be at risk for toll fraud.

Expert toll hackers will target the administration and maintenance capabilities of your system. Once criminals gain access to the administration port, they are able to change system features and parameters so that fraudulent calls can be made. In a modem pool or NETCON modem installation, this would also permit a hacker to transfer to a NETCON extension, get data tone, and obtain a login prompt — permitting transfer out to make toll calls.

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If the data module or modem must be connected to a NETCON administration port, then deny access to any high-risk features or endpoints by placing them in restriction groups on the DEFINITY Communications System. This restricts their accessibility from the incoming facility or endpoints that could transfer a call.

Also, use Class of Restriction to Class of Restriction (COR-to-COR) to restrict stations from calling the NETCON data channels, so that only CORs allowed to access the maintenance port are able to do so. For example, if voice mail extensions have a COR of 9, and extensions assigned to NETCON channels have a COR of 2, ensure that COR 9 does not have access to COR 2. Anyone not authorized to use the NETCON channel should not be able to access it.

In addition, a data module or modem port used for voice mail maintenance or administrative access is often a switch extension. It should be restricted in the same manner as the NETCON channel.

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About This Document

Security Issues

PBX Security Measures

Everyone in your company who uses the telephone system is responsible for system security. Users and attendants need to be aware of how to recognize and react to potential hacker activity. Informed people are more likely to cooperate with security measures that often make the system less flexible and more difficult to use.

Implement the following general security measures to protect your PBX, and discourage the unauthorized use of your communications system.

■ Never program passwords or authorization codes onto auto-dial buttons.

Display phones reveal the programmed numbers, and internal abusers can use the auto-dial buttons to originate unauthorized calls.

■ Discourage the practice of writing down passwords. If a password needs

to be written down, keep it in a secure place and never discard it while it is active.

■ Attendants should tell their system manager if they answer a series of

calls where there is silence on the other end or the caller hangs up.

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■ Users who are assigned voice mailboxes should frequently change

personal passwords and should not choose obvious passwords.

■ Advise users with special telephone privileges (such as Remote Access,

voice mail outcalling, and call forwarding off-switch) of the potential risks and responsibilities.

■ Be suspicious of any caller who claims to be with the telephone company

and wants to check an outside line. Ask for a callback number, hang up,

and confirm the caller’s identity.

■ Never distribute the office telephone directory to anyone outside the

company; be careful when discarding it.

■ Never accept collect phone cal ls.

■ Never discuss your telephone system’s numbering plan with anyone

outside the company.

8400B Plus Data Module User’s Guide

About This Document

Security Issues

■ Change passwords frequently (at least quarterly). Set password

expiration times and tell users when the changes go into effect. Changing passwords routinely on a specific date (such as the first of the month) helps users to remember to do so.

■ Establish well-controlled procedures for resetting passwords.

■ Limit the number of invalid attempts to access a voice mail to five or less.

■ Monitor access to the dial-up maintenance port. Change the access

password regularly and issue it only to authorized personnel. Consider

using the Remote Port Security Device (RPSD) — a Lucent Technologies product that helps protect your administration and maintenance ports from unauthorized access.

■ Create a PBX system management policy concerning employee turnover

and include these actions:

— Delete all unused voice mailboxes in the voice mail system. — If an employee is terminated, immediately delete any voice

mailboxes belonging to that employee.

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— If a terminated employee had Remote Access calling privileges

and a personal authorization code, remove the authorization code immediately.

— If barrier codes and/or authorization codes were shared by the

terminated employee, these should be changed immediately. Notify the remaining users as well.

— If the terminated employee had access to the system

administration interface, their login ID should be removed (G3V3 or later). Any associated passwords should be changed immediately.

■ Back up system files regularly to ensure a timely recovery should it be

required. Schedule regular, off-site backups.

■ Keep the attendant console and supporting documentation in an office

that is secured with a changeable combination lock. Provide the combination only to those individuals having a real need to enter the office.

8400B Plus Data Module User’s Guide

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Lucent Technologies Fraud Intervention

■ Keep telephone wiring closets and equipment rooms locked.

■ Keep telephone logs and printed reports in locations that only authorized

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personnel can enter.

■ Design distributed reports so they do not reveal password or trunk

access code information.

Lucent Technologies Fraud Intervention

If you

suspect you are being victimized

by toll fraud and you need technical support or assistance, call Technical Service Center Toll Fraud Intervention Hotline at 1 800 643-2353.

Important Safety Instructions

When using your equipment, basic safety precautions, including the following, should always be followed to reduce the risk of fire, electric shock, and injury to persons:

■ Read and understand all instructions.

■ Follow all warnings and instructions marked on the product.

■ This product can be hazardous if immersed in water. To avoid the

possibility of electric shock, do not use when you are wet. If you accidentally drop it into water, do not retrieve it until you have first unplugged the power cord from the alternating current (AC) outlet, the line cord from the modular wall jack, and all interconnecting cords from the terminal equipment. Do not plug the cords back in until the product has dried thoroughly.

■ Avoid touching the product during electrical storms in your immediate

area. There is a remote risk of electric shock from lightning. Even though protective measures may have been installed to limit electrical surges from entering your business, absolute protection from lightning is impossible.

Issue 2

■ Never push objects of any kind through housing slots as they may touch

hazardous voltage points or short out parts that could result in a risk of electrical shock. Never spill liquid of any kind on the product.

■ Disconnect the cords on this product before cleaning. Do not use liquid

cleaners or aerosol cleaners. Use a damp cloth for cleaning.

■ Slots and openings in the housing and the back or bottom are provided

for ventilation to protect it from overheating; these openings must not be blocked or covered. The openings should never be blocked by placing the product on a rug or other similar surface. This product should never be placed near or over a radiator or heat register. This product should not be placed in a built-in installation unless proper ventilation is provided.

■ This product should be operated only from the type of power unit

indicated in this manual. If you are not sure of the type of power supply being used, contact a qualified service person.

8400B Plus Data Module User’s Guide

Important Safety Instructions

■ Do not allow anything to rest on the power cord. Do not locate this

product where the cord will be abused by persons walking on it.

■ Do not overload wall outlets and extension cords as this can result in the

risk of fire or electric shock.

■ Disconnect the cords on this product and refer servicing to qualified

service personnel under the following conditions:

a. When the power supply cord or plug is damaged or frayed. b. If liquid has been spilled into the product.

c. If the product has been exposed to rain or water.

d. If the product does not operate normally by following the operating

instructions.

e. If the product has been dropped or the housing has been

damaged.

f. If the product exhibits a distinct change in performance.

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SAVE THESE INSTRUCTIONS

When you see this symbol on the product, refer to the instruction booklet packed with the product for more information before proceeding.

8400B Plus Data Module User’s Guide

Introduction

Overview

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Introduction

This chapter discusses the basic operating features of the 8400B Plus Data Module and describes the external indicators and connectors.

The 8400B Plus Data Module is a new version of the 7400B Plus Data Module and has been designed explicitly to work with two-wire DEFINITY Digital Communications Protocol circuits. It is fully compatible with the 7400B Plus and supports all of its functionality and applications.

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Overview

Congratulations on the addition of the Lucent Technologies 8400B Plus Data Module. Following our tradition of excellent quality and high reliability, we have designed this new 8400B Plus Data Module with the latest advances in telecommunications technology.

The 8400B Plus Data Module is a full-duplex asynchronous data module. It provides integrated voice-data communications at the desktop over standard twisted-pair wiring. At the desk, the 8400B Plus Data Module provides asynchronous communication speeds ranging from 300 bps to 19.2 Kbps. The

8400B Plus Data Module’s ability to emulate a Hayes® compatible modem interface makes it compatible with many standard PC communications packages that use Hayes command sets. In addition, the 8400B Plus Data Module provides a voice dial capability that allows you to initiate voice calls from

8400B Plus Data Module User’s Guide

Introduction

Features

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November 1996

a personal computer (PC) using industry-standard ‘‘auto-dialer’’ PC communications pac k ages.

The 8400B Plus Data Module is a data service link between a Data Terminal Equipment (DTE) device, a two-wire telephone, and a Lucent Technologies DEFINITY

Communications System G3V2 or later.

NOTE:

Unless a specific DTE device is intended, the words

terminal device

be used throughout this guide to represent any applicable DTE device, including a dumb terminal, or a PC with an appropriate communications package.

Features

A terminal device is connected to the 8400B Plus Data Module using a standard Electronics Industries Association EIA-232-D Connector cord and, if needed, the supplied M9/F25 Adapter. The M9/F25 Adapter converts a 25-pin interface to a 9-pin interface, adhering to the Electronics Industries Association/ Telecommunications Industry Association EIA/TIA-574 standard. A Digital Communications Protocol (DCP) interface (using a type D8W modular telephone cord) is used to connect the 8400B Plus Data Module to the digital PBX.

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shall

The 8400B Plus Data Module may be optioned for use either with or without a telephone. In the stand-alone case, the 8400B Plus Data Module supports data service only. Otherwise, the 8400B Plus Data Module provides simultaneous data and voice service. The 8400B Plus Data Module works with all DCP voice terminals that support two-wire operation (such as the 8400 series voice terminals) to provide simultaneous data and voice service.

The voice dial feature allows you to dial a voice call without touching the telephone. Depending on your communications package, you may also store telephone numbers on a PC and recall them for dialing, log phone calls for easy billing, and take notes for later reference during a telephone conversation.

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Introduction

Physical Desc ription

In addition, the 8400B Plus Data Module can be used to automatically turn on the speakerphone of the voice terminal when a voice call is dialed from your terminal device.

Additional features of the 8400B Plus Data Module include the following:

■ nonvolatile, read-write memory for storing installation options, two data

options profiles, and up to four telephone numbers

■ an AT command interface that emulates a Hayes 2400 Smartmodem™

and supports the following:

— storage of the wait time for carrier detect interval (S-register S7) — voice call origination using the ATDP command

■ automatic speed and parity adjustment

■ even, odd, mark, space or no parity

■ automatic data throughput adjustment

■ power-up self-test

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■ local and remote loopback tests with test duration timers

■ voice terminal powered by the PBX is not affected if AC power is

removed from the 8400B Plus Data Module

Physical Description

The 8400B Plus Data Module is housed in a black casing, approximately 5" x 7.75" x 1.5". Its name appears on the underside of the unit. The external features of the front and rear panels and the separate power supply units are described in this section.

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Introduction

Physical Desc ription

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Front Panel

The front panel of the 8400B Plus Data Module is shown in Figure 1-1. One red light emitting diode (LED) and one green LED on the front panel indicate the status of the set during normal operation, and the result of self-tests when initially powered.

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Figure 1-1. Front Panel of the 8400B Plus Data Module

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Introduction

Physical Desc ription

Rear Panel

The rear panel of the 8400B Plus Data Module is shown in Figure 1-2, and the connectors located on the rear panel are described in Table 1-1.

LINE/

PHONE

Figure 1-2. Rear Panel of the 8400B Plus Data Module

USE ONLY WITH COMMUNICATION

POWER

CIRCUIT POWER SOURCE

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Introduction

Physical Desc ription

Table 1-1. Rear Panel Connector Descriptions

Connector Description

PHONE This connector accepts one end of the D8W telephone line

cord used to connect a two-wire voice terminal to the 8400B Plus Data Module.

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LINE/ POWER

EIA CONNECTOR INTERFACE

This connector accepts one end of the D8W telephone cord that connects between the 8400B Plus Data Module and either:

■ a PBX wall jack already powered by a closet

supply, or

■ a power supply, which is connected to the PBX

wall jack.

This unlabeled connector provides an interface between the 8400B Plus Data Module and the terminal device.

■ If the communications port on the terminal

device is a 9-pin interface, use a cord with DB9 male connectors on each end to connect the Data Module to the terminal device.

■ If the communications port on the terminal

device is a 25-pin interface, use a 25-pin EIA-232-D cord, plus the supplied M9/F25 Adapter to connect the Data Module to the terminal device.

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Introduction

Physical Desc ription

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Power Supply Unit

A Lucent T echnologies power supply unit is shipped with each 8400B Plus Data Module. This unit connects to a grounded AC outlet, and provides a connection between the PBX wall jack and the 8400B Plus Data Module. The power supply unit provides the necessary operating voltages for the 8400B Plus Data Module.

CAUTION:

Use the 8400B Plus Data Module only with an approved communication circuit power source.

CAUTION:

Make certain that the AC outlet to which you connect the power supply is unswitched (for example, not controlled by a wall switch or light dimmer).

Instructions for installing the power supply unit are provided in ‘‘Hardware Installation’’ on page 2-8.

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Physical Desc ription

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8400B Plus Data Module User’s Guide

Installation

About the Terminal Device

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Installation

This chapter describes the equipment required for installing the 8400B Plus Data Module, and outlines procedures for preparing it for operation. If you are using the 8400B Plus Data Module with a PC, you will be ready to use a PC communications package after reading this chapter. If you are using the 8400B Plus Data Module with a terminal, printer, or host, or you want to learn about the AT interface and operations, read this chapter, and then continue to Chapter 3.

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About the Terminal Device

The 8400B Plus Data Module operates with any asynchronous data terminal device that has either an EIA-232-D or RS-232-C interface. If you are using a PC as your terminal, you will need a suitable PC communications package. EIA Connector cord and PC communications package requirements are described in this chapter.

before

Y ou must set the appropriate configuration options Plus Data Module to a printer or plotter. To do this, connect a data terminal or PC to the EIA Connector Interface on the 8400B Plus Data Module, change and store the necessary configuration parameters, remove the data terminal or PC, and then connect the printer or plotter. The configuration parameters used for

this type of operation are described in ‘‘Remote Site Use’’ on page 3-13.

connecting the 8400B

8400B Plus Data Module User’s Guide

Installation

Selecting the Correct Installation Procedure

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Selecting the Correct Installation Procedure

The 8400B Plus Data Module is available in two configurations. Before you can successfully install the data module, you must ascertain which configuration you have. Refer to Figure 2-1 (on page 2-3) for an illustration of the components included with each configuration.

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Installation

Selecting the Correct Installation Procedure

CONFIGURATIONS

United States International

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400B2

Adapter

one 7-foot

D6AP 87 cord

KS-22911,L2 Power Supply

8400B Plus

Data Module

one 7-foot D8W

telephone cord

M9/F25 Adapter

DEFINITY

Adjunct Power Kit,

containing:

8400B Plus Data Module

two 7-foot D8W telephone cords

M9/F25 Adapter

MSP-1 Power Supply Kit, containing:

one power

cord

LINEPHONE

OTHER

-7 +8

-2

MSP-1

Power Supply

Figure 2-1. Components of the US Configuration and the International

Configuration

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Installation

Selecting the Correct Installation Procedure

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What You Need

To install and operate the 8400B Plus Data Module, you will need the following items:

■ an asynchronous data terminal or PC with a terminal emulation program

and EIA cord

■ (optional) a two-wire DCP voice terminal with D8W cord

Figure 2-2 illustrates a standard US Configuration, using a telephone and separate power supply.

Figure 2-3 illustrates a standard International Configuration, using a telephone and separate power supply.

The US Configuration may be installed using the Lucent Technologies 1145A or Lucent Technologies 1145B1 closet power supply. The International Configuration may be installed using the Lucent Technologies 1145B1 closet power supply. Both configurations are shown in Figure 2-4. This type of installation eliminates the need for the separate power supply.

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8400B Plus Data Module User’s Guide

Installation

Selecting the Correct Installation Procedure

8400B Plus Data Module

(Rear Endplate)

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M9/F25 Adapter (use only with 25-pin EIA-232-D Connector Cord)

Telephone

(Optional)

D8W

PHONE

LINE/

USE ONLY WITH COMMUNICATION

POWER

CIRCUIT POWER SOURCE

EIA-232-D (9-pin or 25-pin) Connector Cord

D8W

Outlet

Wall

KS-22911, L2 Power Supply

Jack

400B2

Adapter

D6AP

Figure 2-2. Typical Installation of the US Configuration, including

Telephone and Separate Power Supply

8400B Plus Data Module User’s Guide

Installation

Selecting the Correct Installation Procedure

8400B Plus Data Module

(Rear Endplate)

LINE/

USE ONLY WITH COMMUNICATION

PHONE

POWER

Telephone

(Optional)

CIRCUIT POWER SOURCE

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November 1996

M9/F25 Adapter (use only with 25-pin EIA-232-D Connector Cord)

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2-6

D8W

EIA-232-D (9-pin or 25-pin) Connector Cord

D8W

Outlet

Wall Jack

D8W

-7 +8

OTHER

-2

LINEPHONE

Actual connection may vary according to the configuration of your local AC outlet

MSP-1

Power Supply

Figure 2-3. Typical Installation of the International Configuration,

including Telephone and Separate Power Supply

8400B Plus Data Module User’s Guide

Installation

Selecting the Correct Installation Procedure

8400B Plus Data Module

(Rear Endplate)

LINE/

USE ONLY WITH COMMUNICATION

PHONE

POWER

Telephone

(Optional)

D8W

Wall

Jack

CIRCUIT POWER SOURCE

D8W

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EIA-232-D

(9-pin or

25-pin)

Connector

Cord

November 1996

M9/F25 Adapter (use only with 25-pin EIA-232-D Connector Cord)

Issue 2

2-7

Figure 2-4. Typical Installation of the US Configuration or International

Configuration, including Telephone and Closet Power Supply

Selecting an EIA Connector Cord

The standard EIA-232-D Connector cord (already supplied with your terminal or PC) may be used with the M9/F25 Adapter, to connect your terminal or PC to the 8400B Plus Data Module.

■ If the communications port on the terminal device is a 9-pin interface, use

a Connector cord with DB9 male connectors on each end to connect the Data Module to the terminal device.

■ If the communications port on the terminal device is a 25-pin interface,

use a 25-pin EIA-232-D Connector cord, plus the supplied M9/F25 Adapter to connect the Data Module to the terminal device.

8400B Plus Data Module User’s Guide

Installation

Hardware Installation

The most common EIA-232-D Connector cords are supplied with a male connector at both ends. If you have this type of cord and the EIA-232-D port on your terminal device is a male connector, you can use an adapter commonly

referred to as a “gender changer.” Otherwise, obtain an EIA Connector cord that has the appropriate gender connector at each end to fit your application needs.

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November 1996

Selecting DCP Cords

One or more 7-foot D8W cords are supplied with your 8400B Plus Data Module. Use the supplied cord, or obtain the appropriate length D8W telephone cord. If you are using the you will need the D8W telephone cord (already supplied with your telephone) to connect between the 8400B Plus Data Module and your telephone.

With Telephone

option (see ‘‘With Telephone’’ on page 2-12),

Hardware Installation

This section outlines procedures for connecting the EIA Connector cord and M9/F25 Adapter, installing the power supply, and connecting the D8W telephone cord(s).

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2-8

CAUTION:

To avoid possible shock hazards and damage to the equipment, you should perform the installation steps in the order given.

Connecting the 8400B Plus Dat a Module t o the Terminal

Use the EIA Connector cord and, if necessary, the M9/F25 Adapter to connect the 8400B Plus Data Module to the terminal device.

1. Connect one end of the Connector cord into the communications port on the terminal device. Tighten all retaining screws.

8400B Plus Data Module User’s Guide

Installation

Hardware Installation

2. If the Connector cord has 25 pins:

a. Plug the remaining end into the 25-pin portion of the

M9/F25 Adapter.

b. Plug the 9-pin portion of the M9/F25 Adapter into the EIA

Connector Interface on the rear panel of the 8400B Plus Data Module. Tighten all retaining screws.

3. If the Connector cord has 9 pins, you do

a. Plug the remaining end into the EIA Connector Interface on the

rear panel of the 8400B Plus Data Module. Tighten all retaining screws.

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November 1996

not

need the M9/F25 Adapter:

Connecting the 8400B Plus Dat a Module t o the PBX Wall Jack

Use the supplied DCP-type D8W telephone cord(s) to connect the 8400B Plus Data Module to the PBX wall jack, and to the separate power supply if necessary:

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2-9

CAUTION:

Make certain that the AC outlet to which you connect the power supply is unswitched (for example, not controlled by a wall switch or light dimmer).

NOTE:

Since the 8400B Plus Data Module does not have a power on/off switch, the unit will power on as soon as the power supply is connected to an active AC outlet.

1. Insert either end of the first D8W telephone cord into the connector labeled

LINE/POWER

on the rear panel of the 8400B Plus Data Module.

8400B Plus Data Module User’s Guide

Installation

Hardware Installation

2. If you are installing the US Configuration, and using the separate power supply provided with your 8400B Plus Data Module:

a. Plug the 400B2 Adapter into the PBX wall jack. b. Plug the remaining end of the first D8W telephone cord into the

bottom connector on the 400B2 Adapter.

c. Plug one end of the D6AP cord into the power supply unit.

d. Plug the other end of the D6AP cord into the top connector on the

400B2 Adapter.

e. Plug the power supply unit into a 120 VAC, 60 Hz outlet.

3. If you are installing the International Configuration, and using the separate power supply provided with your 8400B Plus Data Module:

a. Insert the remaining end of the first D8W telephone cord into the

connector labeled

b. Insert one end of the second D8W cord into the connector labeled

LINE

on the power supply.

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PHONE

on the power supply.

November 1996

Issue 2

2-10

c. Insert the remaining end of the second D8W cord into the PBX

wall jack. d. Plug the power supply cord into the power supply unit. e. Plug the other end of the power supply cord into an appropriate

AC outlet. If the power supply cord provided with the MSP-1

not

Power Supply is

compatible with your AC outlet, you may

either:

1. use an adapter to conform to local blade arrangement, or

2. use a replacement cord if an appropriate adapter is not available.

4. If you are using a closet power supply instead of the separate power supply, insert the remaining end of the first D8W telephone cord into the PBX wall jack.

8400B Plus Data Module User’s Guide

Installation

Initial System Checks

Connecting a Telephone

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If you are using the

With Telephone

option of the 8400B Plus Data Module (voice and data), install the telephone and any connected adjunct equipment as follows:

1. Insert either end of the remaining D8W telephone cord into the line jack on your two-wire telephone.

2. Insert the other end of the telephone cord into the jack labeled

PHONE

on the rear panel of the 8400B Plus Data Module.

NOTE:

See ‘‘Installation Options’’ on page 2-12 for instructions to select

With Telephone

the

installation option.

NOTE:

If your voice terminal has data capabilities, those data features are not supported while the voice terminal is connected to the 8400B Plus Data Module.

Initial System Checks

The following sections describe procedures for initially checking out your hardware and any required software. It is assumed at this point that your PC communications package has been properly installed and is ready for use. (See ‘‘Selecting PC Communications Packages’’ on page 2-21 for guidelines when selecting your PC commu nic at ion s pac kage.)

NOTE:

PC communications software is required only if you are using a PC as your terminal device. A dedicated data terminal does not need PC communications software.

8400B Plus Data Module User’s Guide

Installation

Installation Options

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Installation Options

Seven installation options are determined by the value entered in S-register S24. The factory-default settings of these installation options are correct for the majority of applications. Check the default values, listed in Table 2-1, to determine whether you need to make any changes.

NOTE:

Changes to these installation options will not affect the factory-default configuration. Conversely, loading the factory default configuration (using the AT&F command) will not affect these installation options. For additional information on the factory-default configuration, refer to page A-24.

With Telephone

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This option is set, by default, for voice terminal and enables simultaneous data and voice calls over the same line from the PBX. When the 8400B Plus Data Module is optioned for operation with a telephone, it must be connected to a two-wire DCP voice terminal. Data service is provided directly from the 8400B Plus Data Module, and any data features that the voice terminal offers cannot be used.

Setting this option to service between a terminal device and a remote system.

NOTE:

If the

With T elephone

successfully complete a data call. If a telephone is not connected, no data calls can be made. If the telephone is disconnected during an active data call, the data call will also be disconnected.

NOTE:

A change in the setting of this option becomes effective when the 8400B Plus Data Module is powered on after being powered off. The setting of this option cannot be changed arbitrarily. It must agree with how the PBX

permits the 8400B Plus Data Module to offer only data

Yes.

This permits operation with an associated

option is selected a telephone

must

be connected to

8400B Plus Data Module User’s Guide

Installation

Installation Options

line is administered. Check with your telecommunications manager to administer the line for simultaneous voice and data or data service required.

US Companding

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Issue 2

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This option is set, by default, for

Yes

. Leaving this default permits the 8400B Plus Data Module to digitize voice signals according to the Mu-Law standards commonly used within the United States.

Setting this option to

requires the 8400B Plus Data Module to digitize voice signals according to the A-Law standards commonly used outside of the United States.

NOTE:

A change in the setting of this option becomes effective immediately.

Telephone Provides Dialing

This option is set, by default, for

Plus Data Module to use the telephone’s DTMF dialing circuits to perform the dialing function. This setting also permi ts the telephone to annunciate the touch-tones.

Setting this option to

requires the 8400B Plus Data Module to perform the dialing function using its internal DTMF dialing circuit. The allow touch-tones to be annunciated.

NOTE:

A change in the setting of this option becomes effective immediately.

Yes

. Leaving this default permits the 8400B

setting does not

8400B Plus Data Module User’s Guide

Installation

Installation Options

Disable Data Metering Feature

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This option is set, by default, for

Yes

. This requires the 8400B Plus Data Module

to adjust its transfer speed to match the transfer speed of the remote system.

CONNECT xxxx

The

message is displayed to indicate the transfer speed

selected when the connection is made.

Changing this option to

allows the user to set up a call to a remote end that is running at a slower speed than the local data module, without having to lower the speed of the terminal. The

CONNECTxxxx

message will always indicate the speed of the local data transfer. The 8400B Plus Data Module performs the speed conversion and uses the Clear to Send (CTS) lead to flow-control the

user’s terminal if it is sending too much data too fast.

NOTE:

If you are using a PC with a communications package, or a dedicated terminal that does not support CTS control, you cannot make file transfers with the data metering feature enabled.

NOTE:

A change in the setting of this option becomes effective immediately when the 8400B Plus Data Module is in the idle mode or as soon as it is returned to the idle mode. The 8400B Plus Data Module is in idle mode

not

any time that it is

in test mode or connected to an active data call.

Immediate Speakerphone Activation

This option is set, by default, for

Yes

. This permits the speakerphone (if available) to be activated before dialing, and allows the user to hear the dial-tone and touch-tones when the

Yes

. (See ‘‘Telephone Provides Dialing’’ on page 2-13.)

Setting this option to

causes the speakerphone to be activated after dialing.

Telephone Provides Dialing

option is set to

The user can still hear the far-end ringing and answering.

8400B Plus Data Module User’s Guide

Installation

Installation Options

555-020-709

NOTE:

This option applies only to voice-dial calls, and is only valid when the

Automatic Speakerphone Activation

November 1996

option (see below) is set to

Yes

Issue 2

2-15

This option is set, by default, for

Yes

, permitting automatic activation of the speakerphone when you use your terminal to dial a voice call.

Setting this option to

causes the 8400B Plus Data Module to disable the automatic speakerphone feature, and necessitate the use of a handset or manual speakerphone activation.

This option has no effect if the voice terminal does not have a speakerphone.

Immediate Speakerphone Activation

When

Activation

are set to

Yes

, the 8400B Plus Data Module automatically activates

and

Automatic Speakerphone

the speakerphone at the beginning of the voice call so you can hear dial-tone and touch-tones.

NOTE:

T o enable this feature, the Telephone Provides Dialing option must also be

Yes

set to

Immediate Speakerphone Activation

When

Speakerphone Activat ion

is set to

is set to No and

Yes

, the activation of the speakerphone is

Automatic

delayed until dialing is complete .

8400B Plus Data Module User’s Guide

Installation

Changing Installation Options

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Disable Busyout Feature During Local Loopback Test

November 1996

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This option is set, by default, for

Yes

. The 8400B Plus Data Module will not busyout the DCP line while performing a Local Loopback Test or Local Loopback Self-Test.

Changing this option to

allows the 8400B Plus Data Module to busyout the DCP line when either the Local Loopback or Local Loopback Self-Test mode is entered. This will cause a busy signal when the set is called. The busyout condition is released when the test ends.

NOTE:

not

any time that it is

in a test mode or connected to an active data call.

Changing Installation Options

All seven installation options are set in S-register S24 via a number that represents their collect iv e val ue.

■ To accept the default value of

(zero) in S-register S24.

■ To specify

for only one of the options, enter its value (see Table 2-1)

in S-register S24. For example, to change

Activation

to No, enter 64 in S-register S24.

Yes

for all options, leave the value of 0

Automatic Speakerphone

■ To specify

for two or more options, add together the value for each of those options (see Table 2-1), and enter the total in S-register S24. For example, to set

Feature

, enter 17 in S-register S24.

With Telephone to No

and

Disable Data Metering

8400B Plus Data Module User’s Guide

Installation

Changing Installation Options

555-020-709

Table 2-1. Installation Option Defaults and Values

Option Name Default Value To Select “No”

With Telephone Yes 1 US Companding Yes 2 Telephone Provides Dialing Yes 4 Disable Data Metering Feature Yes 16 Immediate Speakerphone Activation Yes 32 Automatic Speakerphone Activation Yes 64 Disable Busyout Feature During Local

Loopback Test

Yes 128

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Total, and enter value in

S24 ➜

To adjust the installation options, perform the following steps.

1. Using Table 2-1, determine the total value to be entered in S-register S24.

2. Check the current value of S-register S24 by typing ATS24? .

ENTER

3. If the desired value (ascertained in Step 1) does not match the current value (ascertained in Step 2), change the value of S-register S24. To do

xxx

so, type ATS24=xxx, where

ENTER

Press

is the desired value of S-register S24.

8400B Plus Data Module User’s Guide

Installation

LED Indications

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LED Indications

Two LEDs are located on the top of the 8400B Plus Data Module. One LED is red, and the other LED is green. These indicate the status of the set during normal operation, and the result of self-tests when the unit is initially powered.

When power is first applied to the 8400B Plus Data Module, the unit performs a self-test to verify that it is in working order. During the self-test, both LEDs will remain lit. When the self-test is complete, the green LED will turn off.

■ If self-test passed, the red LED will remain on. This indicates that your

8400B Plus Data Module is installed and READY for data communicatio ns ope ra tio n.

■ If self-test failed, the red LED will flash three times, and then remain on.

This indicates a defective unit. Call the Lucent Technologies Technical Service Center at 1 800 242-2121.

Table 2-2 lists all possible LED indications. Also refer to Chapter 4 for troubleshooting guidelines.

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8400B Plus Data Module User’s Guide

Installation

LED Indications

Table 2-2. LED Indication Summary

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Status of Unit

Green LED

Red LED Description

Self-Test On On When the unit is first powered, this

indicates it is performing a self-test. When the self-test is complete, the

green LED will turn off. If self-test passed, the red LED will

remain on. If self-test failed, the red LED will flash

three times, and then remain on. This indicates a defective unit. Call the Lucent Technolog ies Technical Servic e Center at 1 800 242-2121.

Idle On On Following the initial power-up of the

unit, this indicates that the 8400B Plus Data Module is idle.

Other Test Modes

Flash

Flash* This indicates the unit is in test mode.

For information regarding test mode, refer to Appendix D.

Memory Error Mode

Off Flash* This indicates a defective unit. Call the

Lucent Technolog ies Technical Servic e Center at 1 800 242-2121.

Switch Link Down

Wink

†

Inverted

‡

Wink

The unit is una ble to commun icate with the PBX. Restore the connection between the 8400B Plus Data Module and the PBX wall jack.

Phone Link Down

Inverted

Wink‡

Wink† The unit is unable to communicate with

the telephone. Restore the connection between the 8400B Plus Data Module and the telephone. If no telephone is connected, chang e the installation option to

With Telephone

8400B Plus Data Module User’s Guide

Installation

LED Indications

Table 2-2. LED Indication Summary

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Issue 2

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Green

Status of Unit

Idle Off On This is the unit’s normal mode if no

Incoming Call Flash* On This indicates an incoming call. Active Data Call On On This indicates an active data call.

LED

Red LED Description

active data call exists. The transmission of a character on the

Send Data lead will cause the red LED to flash OFF for 100 ms.

The transmission of a character on the Receive Data lead will cause the green LED to flash ON for 100 ms.

The transmission of a continuous stream of characters, on the Send Data or Receive Data leads, will cause its LED to flash OFF and ON at 100 ms intervals.

The transmission of a character on the Send Data lead will cause the red LED to flash OFF for 100 ms.

The transmission of a character on the Receive Data lead will cause the green LED to flash OFF for 100 ms.

The transmission of a continuous stream of characters, on the Send Data or Receive Data leads, will cause its LED to flash OFF and ON at 100 ms intervals.

Flash

†A

Wink

‡An

Inverted Wink

is a repeating pattern of 500 ms ON and 500 ms OFF.

is a repeating pattern of 750 ms ON and 250 ms OFF.

is a repeating pattern of 250 ms ON and 750 ms OFF.

8400B Plus Data Module User’s Guide

Installation

Selecting PC Communications Packages

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Selecting PC Communications Packages

The purpose of PC communications software is to allow your PC to operate as an asynchronous voice-data communications terminal. Of the many software packages available, all perform essentially the same functions, but often in significantly different ways.

If you do not already have a PC communications package, consult with an experienced user for advice on selecting software to suit your voice-data communications needs. The following, though not required, are a few helpful features that you may wish to look for in the software you select:

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2-21

■ Local mode. Also called

, this feature allows you to issue AT commands to the 8400B Plus

mode

terminal mode, dumb terminal mode

, or

chat

Data Module to configure its options.

■ Dialing directory. This feature allows you to store several frequently

called numbers, often along with configuration of the data options needed for completing the connection.

■ Auto-dialer software. This feature allows you to automate the process

of dialing a voice call without touching the telephone. The following three basic types of auto-dialer software are available:

— Phone Management supports call log and note taking — DOS Utilities typically supports auto-dial capabilities — Personal Information Managers (PIM) supports automated

calendars, databases, time lines, and pert charts

■ Predefined data option profiles. Some programs include completely

defined data option profiles (also called configuration profiles) for popular modems. If available, select the option profile for the Hayes Smartmodem 2400.

■ Command files. These files , a lso call ed

script files

, allow you to define a group of commands that may be executed for automatically logging into specific remote devi ce s.

8400B Plus Data Module User’s Guide

Installation

Selecting PC Communications Packages

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If You Are Using a PC

PC communications packages provide the capability of configuring the 8400B Plus Data Module automatically. When using a PC communications package with the 8400B Plus Data Module, there are two items to note:

1. The PC communications package should be configured to work with a Hayes Smartmodem 2400 or Hayes compatible modem.

2. The dialing method of the PC communications package should be set to

Tone

for data calls and

Many PC communications packages provide the possibility of writing script or command files. These files can then be run to execute a sequence of commands that will configure your system, or even provide an automatic log-on procedure for a particular remote end device. Review the documentation for your PC and PC communications package. Once you understand the PC communications package well enough, you will be ready to begin using it with the 8400B Plus Data Module.

Pulse

for voice calls.

Issue 2

2-22

Since there is such a diversity of functionality among the many PC

communications packages available, refer to the user’s manual of the package for specific details about its use.

For more information about the AT interface and operation of the 8400B Plus Data Module, refer to Chapter 3.

If You Are Using a Dedicated Terminal

When a dedicated terminal is used with an 8400B Plus Data Module, you must control the operation of the 8400B Plus Data Module. In a way, you are acting as a PC communication package. To do this, you must understand the operation of the 8400B Plus Data Module. Refer to Chapter 3 for information on the configuration and operation of your 8400B Plus Data Module.

8400B Plus Data Module User’s Guide

Configuration and Operation

Operating Modes

555-020-709 Issue 2

November 19 96

Configuration and Operation

This chapter describes how to change, store, and recall configuration parameters; outlines how to create and save custom configuration profiles; and discusses more advanced command usage with example command lines.

This chapter also provides some basics on the operation of the 8400B Plus Data Module, describes how to use a few AT commands that are essential for most voice-data communications operations, and then outlines a typical on-line session.

November 1996

3-1

NOTE:

The commands for the 8400B Plus Data Module are referred to as

commands

the line for most commands.

because you must type the letters AT as the first characters on

Operating Modes

Except when a test condition has been initiated, the 8400B Plus Data Module is always in one of two states: command mode or data mode. When power is first applied, the 8400B Plus Data Module initializes to command mode after self-test is complete.

In command mode, the 8400B Plus Data Module looks at everything you type on your keyboard. When you type in something that the 8400B Plus Data Module recognizes as a valid command with a valid parameter (if required), it

8400B Plus Data Module User’s Guide

Configuration and Operation

Issuing Commands

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will execute the action requested. A valid command with an invalid parameter will produce the

ERROR

result code, and is ignored. In data mode, everything you type is

ERROR

result code. An invalid command will also produce the

passed as data without interpretation by the 8400B Plus Data Module, except

escape sequence

the

. The escape sequence, described in later paragraphs, provides a way of switching the 8400B Plus Data Module back to command mode without disconnecting a data call.

Issuing Commands

The following paragraphs describe the elements of a command line and how the 8400B Plus Data Module responds to a command line when it is issued.

AT Command Line Prefix

All command lines issued to the 8400B Plus Data Module must begin with the letters AT or at with the exception of the A/ command, which is discussed later. The command line prefix must be entered as either both uppercase or both lowercase letters (that is, at and AT will work, but aT and At will not).

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The letters AT, also known as the ATtention command, alerts the 8400B Plus Data Module to expect one or more commands to follow. The 8400B Plus Data Module examines the command line prefix to determine the communications rate of the terminal equipment as well as its parity setting. The 8400B Plus Data Module automatically adjusts the speed and parity settings and uses the setting until another AT command is received, or until the 8400B Plus Data Module is powered down.

Formats supported by the 8400B Plus Data Module are shown in Table 3-1.

8400B Plus Data Module User’s Guide

ENTER

Configuration and Operation

Issuing Commands

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Table 3-1. Character Formats

Data Bits Parity Stop Bits

7 even or odd 1 7 mark or space 1 8none1

All of these parameters may be changed on the local terminal device as needed. The 8400B Plus Data Module will adjust to match the speed and parity of the local terminal device when it receives an AT command.

If you connect to a remote system and your screen shows a series of nonsense

characters (also referred to as “garbage”), chances are that you need to adjust the speed or parity on the terminal to match the settings of the 8400B Plus Data Module, which has adjusted its speed to match the remote system.

Command Buffer

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As you type in a command, each character is saved in a 40-character buffer. The AT prefix, spaces, and the at the end of the command line are not saved and do not add to the character count. If you try to type more than 40 countable characters on one line, the result code

ERROR

will be displayed on

your terminal screen, and the command line will be ignored.

Command Line Set Up

A command line begins with the AT prefix, includes one or more commands, and finishes with a line termination character, usually issued by pressing the

ENTER

key. The factory-default line termination character is an ASCII carriage

return. If you make an error while typing a command line, you can send the backspace

character, usually issued by pressing the key, as often as needed to delete the error. However, as soon as you enter the AT prefix, the 8400B Plus Data Module immediately reads it and sets up for a command to follow. Hence,

BACKSPACE

8400B Plus Data Module User’s Guide

Configuration and Operation

Issuing Commands

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you cannot delete the AT prefix once it is typed. The factory-default backspace character is an ASCII backspace.

ENTER

Once you complete a command line by pressing

, the 8400B Plus Data

Module will try to interpret all characters on the command line as valid commands. If the 8400B Plus Data Module finds a character that is not a valid command, it will ignore the erroneous character and any remaining characters on the command line.

Command Acknowledgment

Commands are acted upon immediately and are acknowledged by a result

code. Most commands are acknowledged by codes are configured in the verbose form (command V1 is in effect), and are enabled (Q0 in effect). Another option for configuring result codes is the short or numeric form. These result codes are set by the V0 command, which would produce a 0 (zero) instead of the message to disable them (Q1). Refer to Appendix A for descriptions of the V and Q commands.

. This assumes that the result

. A final option for result codes is

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Several other result codes may appear on your terminal screen while the 8400B Plus Data Module is completing a call. The option selected by the X command controls which of these result codes may appear on the screen of your terminal (the X command is described in Appendix A). All result codes that may be returned by the 8400B Plus Data Module are shown in Table 3-2 and in Appendix E.

8400B Plus Data Module User’s Guide

Configuration and Operation

Issuing Commands

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Table 3-2. Result Codes

Verbose Form Num eric Description

OK 0 Command accepted CONNECT 1 Connection made at 300 bps

NOTE:

If command X0 is in effect, CONNECT means connection made at whatever speed both

ends of the call agreed upon. RING 2 Ring signal detected NO CARRIER 3 Carrier signal not detected or lost ERROR 4 Error in command line CONNECT 1200 5 Connection made at 1200 bps BUSY 7 Busy signal detected

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CONNECT 2400 10 Connection made at 2400 bps CONNECT 4800 11 Connection made at 4800 bps CONNECT 9600 12 Connection made at 9600 bps CONNECT 19200 14 Connection made at 19200 bps

Repeating a Command

As mentioned earlier, the command buffer contains the last completed command line. If you wish to repeat the previous command line without retyping it, type A/ without the AT command prefix and without pressing command is most useful when you have typed a command line to have the 8400B Plus Data Module dial a number, and it returns the result code Use the A/ command to redial the number as often as you wish.

ENTER

BUSY

. This

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Configuration and Operation

Issuing Commands

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Sample Command Lines

This section presents a few sample AT command lines with explanations of the results they will produce.

EXAMPLE 1: Checking if your terminal is communicating with the 8400B Plus Data Module.

ENTER

NOTE:

Remember, the two characters of the AT command prefix must be typed as either both uppercase or both lowercase. That is, you can type either at or AT, but At or aT will not work.

If everything is operating properly, the command should appear on the screen as you type it, and the 8400B Plus Data Module should respond with

EXAMPLE 2: Using a time saver.

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The A/ command tells the 8400B Plus Data Module to repeat the last command line exactly. If you had issued the command to dial a number and the 8400B

BUSY

Plus Data Module returned the message

, you could type the A/

command to try the number again.

NOTE:

The A/ command must be the only command on the command line, and you do

not

press to complete the line.

ENTER

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EXAMPLE 3: Changing data options.

AT E1 &D2 S0=5

ENTER

This command line is a command sequence that sets up the 8400B Plus Data Module to set the command echo option, the DTR option, and the automatic answer option. The commands set the following parameters:

■ AT is the required command prefix.

■ E1 causes characters entered from the keyboard to be echoed to the

screen while in command mode.

■ &D2 causes the 8400B Plus Data Module to hang up the call when the

local terminal turns off DTR.

■ S0=5 causes the 8400B Plus Data Module to enter automatic answer

mode and answer incoming calls on the fifth ring.

Configuration Parameters

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3-7

V alues for configuration parameters are selected by using AT commands. For a description of all AT commands used by the 8400B Plus Data Module, refer to Appendix A.

Parameter Storage and Retrieval

Configuration parameter values include the option values selected by AT commands that require option values and the values stored in the S-registers. A set of configuration parameter values is called a profile. The 8400B Plus Data Module has four configuration profiles at any given time: one active, two stored, and one that permanently contains the factory-default values.

Unsaved changes to configuration parameters remain in effect until they are changed again, or until the 8400B Plus Data Module is disconnected from the AC power source. Before making or storing any changes, or checking changes that you have made, you can issue an AT command to view the values that are currently in the active profile and the two stored profiles.

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The active profile contains the parameter values that are currently in effect. All parameter values can be changed, and most changes can be stored to one of the two profile storage locations by issuing an AT command. Another AT command recalls values from one of the two stored profiles into the active profile.

Factory-default parameter values are a selection of values that are appropriate for a wide number of applications. These values are stored permanently in read-only memory (ROM) and you can issue an AT command to recall them into the active profile at any time.

Commands to view, store, and recall configuration parameters are summarized in Table 3-3. The commands discussed in this section are described in greater detail in Appendix A. To determine whether a configuration parameter that affects a particular S-register can be stored in memory, refer to Appendix C.

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Table 3-3. Commands to Store, Recall, and View

Configuration Parameters

Command Line: Action:

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AT&V Display current AT command settings and S-register

ENTER

values in the active profile and the two stored profiles (also displays the four stored telephone numbers, which are described in the section titled ‘‘

Storing a

Telephone Number’’ on page 3-11).

ENTER

AT&W

Store the configuration parameters in the active profile

to one of the two storage locations, where

represents

the desired location and may be 0 or 1.

ENTER

Immediately reset the 8400B Plus Data Module and

ATZ

recall one of the two stored configuration profiles into active status, where n represents the desired profile and may be 0 or 1.

ENTER

AT&Y

Recall one of the two stored configuration profiles into

active status when the 8400B Plus Data Module is

powered on, where

represents the desired profile and

may be 0 or 1.

AT&F Recall the factory-default configuration settings into the

ENTER

active profile. Note that this command does not load the Installation Option factory default values into the active profile (S-register S24).

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Data Operation

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Data Operation

This section provides information on how to use the 8400B Plus Data Module for data calls.

From Data Mode to Command Mode and Back

escape sequence

temporarily to command mode. Your call does not disconnect, but data is not

exchanged. Once you have “escaped” to command mode, the 8400B Plus Data Module returns

Command Acknowledgmen t ’’ on page 3-4).

‘‘

At this point, you can issue commands to the 8400B Plus Data Module. As long as the data call has not been disconnected, you can use the ATO command to return to data mode.

One other condition will cause the 8400B Plus Data Module to switch from data mode to command mode. If the PBX senses that the remote device has disconnected, it will disconnect the call to the 8400B Plus Data Module. The 8400B Plus Data Module will turn off the green LED, turn on the red LED if it is not already on, display a result code message on your terminal screen (such as

NO CARRIER

, +++ , can be typed at any time during a data call to return

to acknowledge that it has entered command mode (see

), and then return to command mode.

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The escape sequence and all other commands discussed in this section are explained in Appendix A.

Dialing a Data Call

The dial command is issued to the 8400B Plus Data Module in the form

nnn...n

ATDT

Appendix B for more information on dial modifiers), and the number you wish to dial. The command line can hold up to 40 characters, so you can usually precede the D with other commands on the same line.

, where D is the dial command, T is the dial modifier (see

nnn...n

represents

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The following is an example:

ENTER

ATDT74768

In the example, the command will cause the 8400B Plus Data Module to go off hook, dial the number, and then wait the period of time specified in S-register S7 for the call to be completed.

If the call cannot be completed, the 8400B Plus Data Module may disconnect and send the result code

NO CARRIER

BUSY

to your display screen. When a

call is successfully completed, the 8400B Plus Data Module will send the result

CONNECT nnnn

code

to your screen, where

nnnn

represents the speed of the

8400B Plus Data Module (for example, 1200).

NOTE:

The speed sent in the

CONNECT xxxx

message may not be the same speed used to dial the call. In this case, the terminal speed must be changed to match the new speed.

Storing a Telephone Number

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The 8400B Plus Data Module is capable of storing up to four telephone numbers, each of which can contain up to 25 characters. Numbers stored in this way remain available indefinitely, even after the 8400B Plus Data Module has been powered off and then on again.

Table 3-4 describes the command lines used to store a telephone number, delete a number from storage, and dial a stored number.

NOTE:

Digits 0 through 9 and all letters a through z and A through Z may be part

of the stored “number.” Spaces and hyphens (-) may be used in the number when typing the command line. Spaces are not stored and do not add to the total count of characters in the stored number, but all other ASCII characters are stored and counted. Any ASCII character may be used, as long as it is acceptable to the PBX. A semicolon (;) character cannot be stored because it is used to delimit the end of the string being

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stored so that additional commands can be entered on the same command line.

Table 3-4. Commands for Using Stored Telephone Numbers

Command Line: Action:

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AT&Z

ATDS=

m=nnn...n

ENTER

Store number

nnn...n

in location m, which is one of four locations designated by the numbers 0 through 3. For example:

AT&Z2=918006245123

ENTER

stores the number 918006245123 in number storage location 2.

ENTER

Delete any number stored in location m, which is

one of four locations designated by the numbers 0 through 3. For example:

AT&Z2=

ENTER

deletes any number that may have been stored in number storage location 2.

ENTER

Dial the num ber stored in loc at ion m, which is

one of four locations designed by the numbers 0 through 3. For example:

ATDS=2

ENTER

causes the 8400B Plus Data Module to dial the number stored in location 2.

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Automatic Answering

The 8400B Plus Data Module can be set up to answer incoming data calls automatically. To initialize this option, type the command line:

ENTER

nnn

ATS0=

where

nnn

number of rings to wait before answering. If

is a decimal number in the range of 1 through 255, representing the

nnn

is 0 (the factory-default setting),

the automatic answer feature is turned off.

Remote Site Use

The 8400B Plus Data Module can be used at a remote site as a dedicated service devi ce to answer incomi ng dat a call s, send data to a rem ote end dev ice, and then hang up. For example, you may wish to provide access to a printer from a remote site.

The following is a typical command line you might use for setting up this operation (spaces are used here for readability, but are not required):

ENTER

AT &F &C1 &D2 E0 Q1 S0=1 &W0 &Y0

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Following the AT prefix, the commands in the example produce the following results:

■ &F resets the options to the factory defaults.

■ &C1 sets the Data Carrier Detect (DCD) circuit of the 8400B Plus Data

Module to operate according to the EIA standard.

■ &D2 sets the 8400B Plus Data Module to go on hook when an on-to-off

transition is detected on the Data Terminal Ready (DTR) input, disconnecting the call.

■ E0 turns off the echo.

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■ Q1 turns off the result codes that would be the normal responses of the

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8400B Plus Data Module to commands that it receives. (For example,

CONNECT

the

message that is displayed when answering a call would

interfere with the printer.)

■ S0=1 turns on the automatic answer feature and causes the 8400B Plus

Data Module to answer an incoming data call on the first ring.

■ &W0 causes the current configuration to be stored in data profile storage

location 0.

■ &Y0 selects the configuration stored in data profile storage location 0 to

become the current configuration each time the 8400B Plus Data Module is powered on.

Refer to Appendix A for a complete description of each command used in this section.

Reset and Configuration Recall

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Two commands are available for recovering from various data communications problems. You can reset the 8400B Plus Data Module and recall one of two stored profiles as the current configuration. The form for this command is as follows:

ENTER

ATZ

where n is the number 0 or 1, representing the configuration profile to be recalled.

A second command allows you to recall the factory-default configuration if, for instance, you lose track of the active configuration changes you have made and need to start over. The form for this command is as follows:

AT&F

ENTER

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Configuration and Operation

Data Operation

Sample Command Lines

This sectio n pres ent s a few sampl e AT command lines for data calls, along with explanations of the results they will produce.

EXAMPLE 1: Dialing a data call.

AT D T 18006245123

CONNECT 2400

In the first line of this example:

■ AT is the required command prefix.

■ D is the dial command.

■ T is the dial modifier for a data call. (This is not required, and may be

omitted.)

■ The remainder of the line is the telephone number.

NOTE:

The spaces between the commands and the telephone number are included only for readability and are not required. You may also insert hyphens (-) anywhere in the telephone number for increased readability.

ENTER

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In the second line of this example, the 8400B Plus Data Module returns a response indicating that a connection with the remote end device has been successfully completed at 2400 bps.

EXAMPLE 2: Dialing a data call outside your PBX domain with another option thrown in.

ENTER

AT &F D 9 1 800 555-5555

BUSY

In the first line of this example:

■ AT is the required command prefix.

■ &F tells the 8400B Plus Data Module to restore the factory-default

configuration parameters.

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■ D is the dial command.

■ 9 represents the access code required to dial a number outside your

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PBX domain.

■ The remainder of the line is the telephone number.

In the second line of this example, the 8400B Plus Data Module indicates that it detected a busy signal, and the call is automatically disconnected.

A Sample On-Line Session

This section outlines how to perform a simple on-line session using the AT commands described in this chapter. For more information about all AT commands, see Chapter 3 and Appendix A.

Starting the Session

The following is a sample data call to a fictitious bulletin board service. If you

know the number of a “real” bulletin board service, you might try an actual log on by using that number and following the suggestions in this session.

ENTER

AT D 9-555-7575

CONNECT 1200

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The D command is used to dial the number of the bulletin board. Since the connection was made successfully, the 8400B Plus Data Module responded with a message that says the remote end connected and the data speed to be used is 1200 bps. If this does not match the speed of your terminal or PC, you must adjust the speed of the terminal or PC to 1200 bps.

The remote end may do nothing until you press a particular key a few times,

ENTER

usually

. T ypical of many data communications application programs, this

sometimes required input lets the remote end determine whether you have connected with the correct communications parameters in effect.

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Possible Display Problems

If the response from the remote end is unintelligible “garbage,” chances are that the speed or parity bit selection is incorrect. In this case, assuming that your terminal device allows, the parameters may be corrected without disconnecting the call. Otherwise, you must disconnect, correct the parameters, and then try the call again.

Disconnecting a Data Call

Most remote systems will have a command or menu selection for logging off. When you select the appropriate means, the remote system will disconnect or hang up. The PBX will disconnect the call and, after a moment, the 8400B Plus Data Module will send the following message to your display:

NO CARRIER

Alternatively, you can use the following disconnect procedure:

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Selection: +++

The prompt Selection: is simply a representation of how the remote system might ask you for your next command or menu selection. Type the escape sequence (default is +++) but do

not

press . (Pause before typing +++ ,

ENTER

type +++ quickly, and then pause again after typing +++.) When the 8400B Plus

Data Module responds with

ENTER

ATH

, type the command line:

The PBX will disconnect from the remote end device, and the 8400B Plus Data

Module will send the

message to the terminal display.

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Voice Operations

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Voice Operations

This section provides information on how to use the 8400B Plus Data Module for voice dialing.

NOTE:

The host PBX must be administered to support voice and data calls.

Using the 8400B Plus for Voice Dialing

The 8400B Plus Data Module is equipped with a voice-dial feature that allows you to place voice telephone calls from the attached terminal device. To place a voice call, just tell the 8400B Plus Data Module to use pulse dialing by including the P dial modifier. (For data calls, tell it to use tone dialing by including the T dial modifier.) If you fail to specify the type of dialing to be used for a call, a data call will be made.

If you have a speakerphone, the 8400B Plus Data Module will normally turn it on when a voice call is being dialed. You may option the 8400B Plus Data Module to inhibit the speakerphone or delay activating it until after dialing is complete by setting the appropriate installation options. For more information on installation options, see Chapter 2.

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If your telephone does not have a speakerphone, you may lift the handset at any time before, during, or after the call is dialed.

Voice calls can be originated from the PC, but you must use the telephone to hang up a call.

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Dialing Instructions

When a voice call is made using the PC, the telephone number should be given to the 8400B Plus Data Module in a single AT dial command as indicated in the example below.

ATD P 9,1 (908) 555-1212

ENTER

The P dial modifier must be included to tell the 8400B Plus Data Module that the call is a voice call. If an attempt to dial a voice call is made using more than one dial command on a command line, the first dial command will be accepted and the second dial command may be discarded. After dialing the call, the 8400B Plus Data Module automatically returns to the command mode.

A second voice call can be made from your PC by manually placing the first call on HOLD, and then entering a dial command for the second call. Any attempt to dial a second voice call while the first call is being dialed will be ignored.

Dialing Delay

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To ensure that dialing does not begin before dial tone is received, dialing a voice call will be delayed by the time stored in S-register S6 (Wait Time Before Blind Dialing) and can be set to a maximum value of 255 seconds. The factory setting of two seconds for S-register S6 is adequate for most calls.

Dialing Pause

A pause for second dial tone is normally required for calls outside the PBX. This can be provided by including a comma between the outside line prefix (for example, 9) and the first digit of the telephone number to be dialed. The comma instructs the 8400B Plus Data Module, after dialing the prefix number, to pause a fixed time before dialing the first digit of the telephone number. The pause time is st or ed i n S- r e gi st er S8 (Duration of Delay For Comma Dial Modifier) and can be set for any value up to a maximum of 255 seconds. The factory setting of two seconds is adequate for most applications and should not be changed. If added delay is required, additional commas can be added to the number.

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ENTER

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Configuration and Operation

Voice Operations

Sample Command Line

This section presents a few sample AT command lines for voice dialing, along with explanations of the results they will produce.

EXAMPLE 1: Dialing a voice call.

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ATD P 9,1 9085551212

In the first line of this example:

■ AT is the required command prefix.

■ D is the dial command.

■ P is the dial modifier required to initiate a voice call.

■ 9 represents the access code required to dial a number outside your

PBX domain.

■ , (comma) is the dial modifier pause required for a second dial tone.

■ 1 represents the code required to dial a number outside your area code.

■ The remainder of the line is the telephone number.

EXAMPLE 2: Using the 8400B Plus Data Module as a touch-tone generator to dial a voice mail system and log-on to retrieve messages.

ATD P 8000,,3452#, 999#

■ AT is the required command prefix.

■ D is the dial command.

■ P is the dial modifier required to initiate a voice call.

■ 8000 represents the internal number for accessing the AUDIX voice mail

system.

■ ,, (two commas) introduce a double delay while the call is being

established.

■ 3452# is the extension for the messages you want to receive.

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Configuration and Operation

Voice Operations

■ , (one comma) introduces a single delay.

■ 999# is the password for the above extension.

At this point you are in your voice mail system ready to send, receive, etc., messages.

EXAMPLE 3: Using the 8400B Plus Data Module to dial multiple calls.

AT D T 1 800 624-5123; D P 9, 555-1212

■ AT is the required command prefix.

■ D is the dial command.

■ T is the dial modifier required to initiate a data call.

■ 1 represents the code required to dial a number outside your area code.

■ 800 624-5123 is the remainder of the data call telephone number.

■ ; (semicolon) returns you to the command mode.

■ D is the dial command.

ENTER

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■ P is the dial modifier required to initiate a voice call.

■ 9 represents the access code required to dial a number outside your

PBX domain.

■ , (one comma) introduces a single delay.

■ 555-1212 is the voice call telephone number.

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How to Use This Chapter

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Troubleshootin g

This chapter describes procedures for troubleshooting most problems that may be encountered while installing, configuring, and operating the 8400B Plus Data Module.

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4-1

Use the following guidelines to isolate and correct a problem:

1. Scan through the “Symptom” column in the chart to find the description

that best describes the problem situation you have encountered.

2. In the “Problem” column, one or more problem descriptions is offered. Select the one that best describes the observable condition, or try each suggestion in turn until the trouble has been corrected.

3. Perform the task described in the “Solution” column. In cases where you are directed to type an AT command to correct the problem and the 8400B Plus Data Module is in the data mode, simply do the following:

a. Type the escape sequence (+++) to enter command mode; the

8400B Plus Data Module will respond with option has been set to disable result codes).

b. Type the suggested command line. If the solution suggests

disconnecting the call, type the command line

ENTER

ATH

or 0 (unless the Q1

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4. To return to data mode after using the escape sequence to enter command mode, type the command line

ENTER

ATO

Table 4-1. Troubleshooting Guidelines

Symptom Problem Solution

Both LEDs are off. Power is off. Check that the AC outlet is working.

Check that the power su pply unit is properly connected to the 8400B Plus Data Module and to the AC outlet.

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The green LED is winking (750 ms on, 250 ms off), and the red LED is inverted winking (750 ms off, 250 ms on).

The red LED is winking (750 ms on, 250 ms off), and the green LED is inverted winking (750 ms off, 250 ms on).

No dial tone is heard when the telephone handset is lifted. All call appear ance LEDs on the telephone are off.

The 8400B Plus Data Module has lost communications with the PBX.

The 8400B Plus Data Module has lost communications with the telephone.

Incorrect option settings.

For the MSP-1 power supply, check that the D8W cord is connected between the of the power supply and the PBX wall jack.

For the KS-22911,L2 power supply, check that the 400B2 adapter is connected to the PBX wall jack.

Note also that the line from the PBX must be properly administered for the 8400B Plus Data Module.

Check that the D8W telephone cord is securely connected between the telephone and the 8400B Plus Data Module.

Change the

Yes

LINE/POWER

PHONE

jack on the

With Telephone

connector

option to

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Table 4-1. Troubleshooting Guidelines

Symptom Problem Solution

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Call disconnects immediately after an attempt to connect; NO CARRIER may be displayed on the local terminal device; green LED turns off, red LED is on.

The speed of the far-end device is higher than the speed of the local terminal device.

The far-end device is set up for half-duplex or synchronous operation.

Change the speed of the local terminal device to match that of the far-end device. If the speed of the far-end device is not known, set the local terminal device to the highest speed available.

The 8400B Plus Data Module cannot communicate with a far-end devi ce that is operating half-duplex or synchronous. This problem can be resolved only if the far-end device can be reconfigured for full-duplex, asynchronous operation.

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Table 4-1. Troubleshooting Guidelines

Symptom Problem Solution

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Call disconnects immediately after an attempt to connect; BUSY or NO CARRIER may be displayed on the local terminal device; green LED turns off, red LED is on.

The far-end device is busy with another call.

The telephone number was dialed incorrectly.

The far-end device is not busy, but the PBX has restricted access to the called device.

The value in S-register not allow enough time for the call to be completed.

S7 does

Try the call again.

Check the number of the far-end device that you wish to call and try the call again.

This situation can only be resolved by having the PBX readministered to remove the access restriction.

Increase the value of S-register

S7.

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Table 4-1. Troubleshooting Guidelines

Symptom Problem Solution

November 1996

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The PC communications software indicates that the call has been disconnected, but the green LED is still on.

The speakerphone does not turn on when a voice call is dialed.

The 8400B Plus Data Module has ignored the on-to-off transition of the DTR lead.

The 8400B Plus Data Module has ignored the H (hang-up) command.

Incorrect option settings.

From command mode, type the command

AT&D2

to set the DTR lead option to disconnect on DTR le ad transition fro m on to off. Alternatively, determine and use the command provided by the communications so ftware to imp lement this change.

Ensure that after the e sc ap e s eq uen ce

+++) has been entered to switch the

( 8400B Plus Data Module to command mode, an adequate pause before and after the the command mode with the result codes enabled, the 8400B Plus Data Module must be given time to return or command.

Change the

Activation

ENTER

+++ is allowed before issuing

H command. In escaping to

before it is ready to accept a

Automatic Speakerphone

option to

Yes

The speakerphone turns on when a voice call is dialed, but dial to ne and touch-tones are not heard.

Incorrect option settings.

Change the

Activation

Immediate Speakerphone

option to

Yes

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Table 4-1. Troubleshooting Guidelines

Symptom Problem Solution

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The speakerphone turns on when a voice call is dialed, and a dial tone is heard, but touch-tones are not heard.

Dial tone and voice sounds are distorted.

Data calls are dialed instead of voice calls.

Dialing begins before the dial tone is heard on a voice call.

Incorrect option settings.

Incorrect dial modifier is used with the command.

Incorrect blind dial delay.

ATD dial

Change the

Dialing

Change the

Yes

to enable Mu-Law companding (within the US), or to A-Law companding (ou tside of the US).

Change the PC communications package to use Pulse dialing, or insert a P as the first digit of the telephone number.

Check the value stored in S-regis ter S6 by typing

ATS6?

nnn

(system responds with value)

Telephone Provides

option to

Yes

US Companding

ENTER

option to

to enable

Add 1 second to the above value by typing

ATS6= (nnn+1)

ENTER

and try again.

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How to Use This Chapter

Table 4-1. Troubleshooting Guidelines

Symptom Problem Solution

November 1996

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Dialing begins before the second dial tone is heard.

The 8400B Plus Data Module does not pause when a comma is inserted in a telephone numbe r for a voice dial call.

Incorrect dialing pause.

The comma delay is set to 0 (zero).

Insert a comma in the telephone number after the 9 (digit used for calls outside the PBX).

ATDP9,555-1212

ENTER

If the problem persists, insert another comma for a second pause.

ATDP9,,555-1212

ENTER

and try again.

Check your PC communications package to make s ure th e com mas are sent to the 8400B Plus Data Module along with the digits.

Check your PC communications package to make sure a comma is a valid character. Type

ATS8=2

ENTER

to set the pause to 2 seconds.

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Table 4-1. Troubleshooting Guidelines

Symptom Problem Solution

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The green LED is flashing, and the red LED is on, but the 8400B Plus Data Module does not automatically answer the incoming call.

Transmitted and/or received data contains errors.

The automatic answer option is not enabled.

The automatic answer option is enabled, but the terminal device is not ready.

Speed settings of the terminal device and the 8400B Plus Data Module are not the same.

The local terminal device and the far-end device are configured for different parity settings.

From the command mode, type

ATS0=1

to turn on the automatic answer feature. Set the value following the equal sign ( ring number on which you want the 8400B Plus Data Module to answer an incoming call. The automatic answer feature is turned off by setting this value to

If the local terminal is a PC, configure the communicatio ns software to turn on the DTR lead, or set the 8400B Plus Data Module to ignore the DTR lead by typing

AT&D0

Change terminal devi ce speed to agree with the speed that was in dicated in the

CONNECT

Change the parity setting of the local terminal device to match that of the far-end device.

ENTER

1 in the example) to the

ENTER

nnnn

message.

Far-end data errors occur only during file transfer with PC communication s package.

PC does not support hardware flow control.

Disconnect the call, change the

Disable Data Metering Feature

Yes

, reestablish the call, and try the

to file transfer again.

option

8400B Plus Data Module User’s Guide

Troubleshooting

555-020-709

How to Use This Chapter

Table 4-1. Troubleshooting Guidelines

Symptom Problem Solution

November 1996

Issue 2

4-9

Result codes are not displayed when commands are entered.

Numeric code returned when verbose messag e is preferred.

Commands are displayed without error as they are typed (echoed), but the 8400B Plus Data Module does not respond to any command.

CONNECT

The message is sent without a speed indication, but the far-end device is not set at 300 bps.

The display result codes option is turned off.

The result code format option is set to numeric form.

The local terminal device is set to a speed not supported by the 8400B Plus Data Module.

The 8400B Plus Data Module is configured to display only the basic set of result codes (option

X0).

Turn on the display result codes option by typing

ATQ0

Change the result code format option to verbose form by typing

ATV1

Set the terminal device for one of the supported speeds: 300, 1200, 2400, 4800, 9600, or 19200 bps.

Configure the 8400 B Plus Data Module to send for all speeds except 300 bps by typing

ATX4

ENTER

CONNECT

ENTER

nnnn

messages

8400B Plus Data Module User’s Guide

555-020-709

Troubleshooting

How to Use This Chapter

Table 4-1. Troubleshooting Guidelines

Symptom Problem Solution

Characters typed on the keyboard are not displayed on the screen of the terminal d evice.

If the red LED flashes off but the green LED does not flash on when characters are typed, the command echo option is turned off.

November 1996

Issue 2

4-10

ENTER

Press to start a new command line, and then type

ENTER

ATEl

to turn on the command echo.

AT prefix is

typed, and it is displayed as AATT.

If the red and green LEDs do not flash when keys on the terminal are pressed, the terminal is not working, or the EIA Connector cord or adapter are not connected or are improperly wired.

The red LED flashes off and the green LED flashes on, but certain EIA signal leads are turned off.

The terminal is optioned to display each typed character, and the 8400B Plus Data

Module’s command echo option is enabled.

Connect or replace the EIA Connector cord and/or adapter between the 8400B Plus Data Module and the local terminal device. If the problem persists, verify that the terminal is functioning correctly.

ENTER

Press to start a new command line, then type

AT&S0&C0

ENTER

to ensure that the DSR and RLSD EIA signal leads are turned on.

Disable the command echo by entering

ATE0. As you type the ATE0

command, and the 8400B Plus Data Module will send the response code screen. The next command that you enter should appear in single characters.

AATTEE00 will appear,

to your

8400B Plus Data Module User’s Guide

AT Command Set

555-020-709 Issue 2

November 19 96

AT Command Set

This appendix contains an explanation of each AT command accepted by the 8400B Plus Data Module. Labels used in the descriptions are defined as follows:

Table A-1. Accepted AT Command Labels

Label Description

November 1996

A-1

Command: The command is shown as it should be typed. The

command may be typed in uppercase or lowercase. Spaces may be typed between multiple commands on the same command line for readability, but the spaces are ignored by the 8400B Plus Data Module.

Function: A brief, functional description of the command is

provided here.

Type: Type may be

command causes the 8400B Plus Data Module to perform an action as soon as the command is sent (for example, go off-hook or dial a number). A configuration command modifies a configuration parameter during the current session.

immediate

configuration

. An immediate

8400B Plus Data Module User’s Guide

AT Command Set

555-020-709

November 1996

Table A-1. Accepted AT Command Labels

Label Description

Arguments: Many commands accept or require a numerical

argument. Whether an argument is required and the range of acceptable values for the argument is shown here.

S-Register: The S-registers consist of 28 1-byte memory locations

in the data module, designated as S0 through S27. The S-registers hold values for defining the current configuration of the 8400B Plus Data Module. Some commands modify a specific S-register, and some commands perform an action based on the current value stored in an S-register. Whether an S-register is modified or read by the current command is explained here.

Example: A sample command line follows this label to

demonstrate how the command may be used.

Issue 2

A-2

Comments: An explanation of the example and any other

information about the command not provided elsewhere is provided here. Additional commands may be typed on the same command line with the command currently under discussion, unless noted otherwise.

See Also: Following this label are suggestions on where to look for

more information about the current command and a listing of any other commands that may be used with or affect the use of the current command.

8400B Plus Data Module User’s Guide

AT Command Set

555-020-709

November 1996

Table A-1. Accepted AT Command Labels

Label Description

Command: +++ Function: Escape sequence. Type: immediate Arguments: none S-Register: S2 and S12 Example: +++ Comments: The purpose of the +++ command is to provide a way to

switch the 8400B Plus Data Module from on-line or data mode to command mode without disconnecting a data call that is in progress. As long as the call is not disconnected, you can return to the data mode with the O command.

This is one of the two commands that does not require the AT prefix (A/ is the other one), and it is never followed by pressing . The value in S12

ENTER

determines how long your keyboard should remain idle before entering the escape sequence, as well as the maximum allowable time between entering each character of the sequence. The character used in the escape sequence is determined by the value in S2 (default is ASCII 43, the plus sign).

Issue 2

A-3

See Also: "From Data Mode to Command Mode and Back" on

page 3-10, the 0 command on page A-14

, S2 on page

C-9, and S12 on page C-19.

8400B Plus Data Module User’s Guide

AT Command Set

555-020-709

Table A-1. Accepted AT Command Labels

Label Description

Command: A Function: Go off-hook in Answer mode. Type: immediate Arguments: none S-Register: Bit 7 of S14 is set to 0.

November 1996

Issue 2

A-4

Example: ATA

ENTER

Comments: The A command causes the 8400B Plus Data Module to

go off-hook in answer mode and attempt to answer an incoming call. The option set by the &D command and the contents of S0 and S1 are ignored when this command is issued.

Avaya 8400B User's Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Purpose

About This Document

Organization of This Guide

How to Order Documentation

How to Comment on This Document

Conventions Used

Security Issues

NETCON Data Channels

PBX Security Measures

Lucent Technologies Fraud Intervention

Related Documentation

Important Safety Instructions

Overview

Introduction

Features

Physical Desc ription

Front Panel

Rear Panel

Power Supply Unit

About the Terminal Device

Installation

Selecting the Correct Installation Procedure

What You Need

Selecting an EIA Connector Cord

Hardware Installation

Selecting DCP Cords

Connecting the 8400B Plus Dat a Module t o the Terminal

Connecting the 8400B Plus Dat a Module t o the PBX Wall Jack

Initial System Checks

Connecting a Telephone

Installation Options

With Telephone

US Companding

Telephone Provides Dialing

Disable Data Metering Feature

Immediate Speakerphone Activation

Automatic Speakerphone Activation

Changing Installation Options

Disable Busyout Feature During Local Loopback Test

LED Indications

Selecting PC Communications Packages

If You Are Using a PC

If You Are Using a Dedicated Terminal

Operating Modes

Configuration and Operation

Issuing Commands

AT Command Line Prefix

Command Buffer

Command Line Set Up

Command Acknowledgment

Repeating a Command

Sample Command Lines

Configuration Parameters

Parameter Storage and Retrieval

Data Operation

From Data Mode to Command Mode and Back

Dialing a Data Call

Storing a Telephone Number

Automatic Answering

Remote Site Use

Reset and Configuration Recall

Sample Command Lines

A Sample On-Line Session

Starting the Session

Possible Display Problems

Disconnecting a Data Call

Voice Operations

Dialing Instructions

Dialing Delay

Dialing Pause

Sample Command Line

How to Use This Chapter

Troubleshootin g