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Preface, Objectives and reader assumptions, How to use this manual – Paradyne 3821PLUS User Manual

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3821-A2-GB20-30

February 1998

Preface

Objectives and Reader
Assumptions

This guide describes how to install the 3821Plus circuit

card and operate the 3821Plus modem. It is intended for
all users of the 3821Plus modem.

Each 3821Plus card comprises three modems. In

general this guide refers to the 3821Plus modem with
regard to operation and the 3821Plus card with regard to
installation. The term 3800Plus refers to all the modems
in the 3800Plus series, including the 3810Plus, 3811Plus,
3820Plus, 3821Plus, and 3825Plus.

How to Use This Manual

Chapter 1

provides information about 3821Plus

hardware and software features, including the front panel
and status indicators.

Chapter 2

provides instructions for installing the card,

selecting factory configuration options, recovering the
ability to use AT commands, and using AT command
initialization strings.

Chapter 3

shows the options menus available from the

Shared Diagnostic Control Panel (SDCP).

Chapter 4

provides instructions for displaying and

changing AT commands and S-registers. These commands
control all aspects of the modem’s operation.

Chapter 5

provides general information about fax

modem operation.

Chapter 6

shows how to use the SDCP of a

COMSPHERE modem to access and control a remote
3800Plus modem.

Chapter 7

describes the security features of the

3821Plus modem, including AT commands and SDCP
controls used to set security configuration options.

Appendix A

shows the menu trees available from the

SDCP.

Appendix B

lists result codes produced by the modem.

Appendix C

provides instructions for performing

diagnostic tests when data communications problems
occur, and explains the Automatic Firmware Download
process.

Appendix D

lists the technical specifications of the

3821Plus modem.

Appendix E

provides cable pin assignments.

Appendix F

provides V.25bis dialing information.

Appendix G

provides an equipment list.

Appendix H

shows configuration options whose

validity or default values vary according to country code.

The

Glossary

provides a description of terms used

throughout this guide.