Paradyne 3810 User Manual

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Page 1

COMSPHERE

3800 SERIES MODEMS

MODELS 3810, 3811, AND 3820

USER’S GUIDE

Document No. 3810-A2-GB30-20

November 1996

Page 2

COMSPHERE 3800 Series Modems

COMSPHERE 3800 Series Modems Models 3810, 3811, and 3820

User’s Guide 3810-A2-GB30-20

3rd

Edition (November 1996)

Changes

and enhancements to the product and to the information herein will be documented and issued as a new release.

For the 3800 Series standalone modems, the Universal Service Order Code (USOC) for Permissive mode is RJ11C and for Programmable mode is RJ41S or RJ45S. The Canadian equivalent to the USOC is CA1 CA45A for RJ41S and RJ45S, respectively

. For 3800 Series carrier-mounted modems, the USOC for Permissive mode is

1 for RJ1

1C, and CA41A and

RJ21X and for Programmable mode is RJ27X. The Canadian equivalent to the USOC is CA21A for RJ21X and CA27A for RJ27X.

Warranty, Sales, and Service Information

Contact your sales or service representative directly for any help needed. For additional information concerning warranty, sales, service, repair

• Via the Internet:

ia T

• V

elephone: Call our automated call system to receive current information via fax or to speak with a company

, installation, documentation or training, use one of the following methods:

isit the Paradyne World W

ide W

eb site at http://www

.paradyne.com

representative. — Within the U.S.A., call 1-800-870-2221 — International, call 813-530-2340

Trademarks

All products and services mentioned herein are the trademarks, service marks, registered trademarks or registered service marks of their respective owners.

Printed on recycled paper

This

publication is protected by federal copyright law

translated into any human or computer language in any form or by any means, electronic, mechanical, magnetic, manual or otherwise, or disclosed to third parties

without

the express written permission of Paradyne Corporation, 8545 126th A

Paradyne

Corporation makes no representation or warranties with respect to the contents hereof and specifically disclaims any implied warranties of

fitness for a particular purpose. Further

hereof

without obligation of Paradyne Corporation to notify any person of such revision or changes.

A November 1996 3810-A2-GB30-20

, Paradyne Corporation reserves the right to revise this publication and to make changes from time to time in the contents

. No part of this publication may

venue North, P

be copied or distributed, transmitted, transcribed, stored in a retrieval system,

.O. Box 2826, Largo, Florida 33779-2826.

merchantability

Page 3

Important Safety Instructions

1. Read and follow all warning notices and instructions marked on the product or included in the manual.

2. This product is intended to be used with a three-wire grounding type plug – a plug which has a grounding pin. This is a safety feature. Equipment grounding is vital to ensure safe operation. Do not defeat the purpose of the grounding type plug by modifying the plug or using an adapter

Prior to installation, use an outlet tester or a voltmeter to check the ac receptacle for the presence of earth ground. If the receptacle is not properly grounded, the installation must not continue until a qualified electrician has corrected the problem.

If a three-wire grounding type power source is not available, consult a qualified electrician to determine another method of grounding the equipment.

3. Slots and openings in the cabinet are provided for ventilation. To ensure reliable operation of the product and to protect it from overheating, these slots and openings must not be blocked or covered.

4. Do not allow anything to rest on the power cord and do not locate the product where persons will walk on the power cord.

Safety Instructions

5. Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous high voltage points or other risks. Refer all servicing to qualified service personnel.

6. General purpose cables are provided with this product. Special cables, which may be required by the regulatory inspection authority for the installation site, are the responsibility of the customer.

7. When installed in the final configuration, the product must comply with the applicable Safety Standards and regulatory requirements of the country in which it is installed. If necessary, consult with the appropriate regulatory agencies and inspection authorities to ensure compliance.

8. A rare phenomenon can create a voltage potential between the earth grounds of two or more buildings. If products installed in separate buildings are interconnected, the voltage potential may cause a hazardous condition. Consult a qualified electrical consultant to determine whether or not this phenomenon exists and, if necessary interconnecting the products.

In addition, if the equipment is to be used with telecommunications circuits, take the following precautions:

– Never install telephone wiring during a lightning storm.

Never install telephone jacks in wet locations unless the jack is specifically designed for wet

–

locations. Never touch uninsulated telephone wires or terminals unless the telephone line has been

–

disconnected at the network interface.

– Use caution when installing or modifying telephone lines. – Avoid using a telephone (other than a cordless type) during an electrical storm.

There may be a remote risk of electric shock from lightning.

– Do not use the telephone to report a gas leak in the vicinity of the leak.

, implement corrective action prior to

B3810-A2-GB30-20 November 1996

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COMSPHERE 3800 Series Modems

Notices

WARNING

THIS

EQUIPMENT HAS BEEN TESTED 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, 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 OWN EXPENSE.

THE AUTHORITY TO OPERATE THIS EQUIPMENT IS CONDITIONED BY THE REQUIREMENTS THAT NO MODIFICATIONS APPROVED BY PARADYNE.

TO USERS OF DIGITAL APPARATUS IN CANADA: THIS CLASS A DIGITAL APPARATUS MEETS ALL REQUIREMENTS OF THE CANADIAN INTERFERENCE-CAUSING

EQUIPMENT REGULATIONS. CET APPAREIL NUMÉRIQUE DE LA CLASSE A RESPECTE TOUTES LES EXIGENCES DU RÈGLEMENT SUR LE

MATÉRIEL BROUILLEUR DU CANADA.

WILL BE MADE T

AND FOUND T

O THE EQUIPMENT UNLESS THE

O COMPL

Y WITH THE LIMITS FOR A CLASS A DIGIT

WARNING

CHANGES OR MODIFICA

TIONS ARE EXPRESSL

AL DEVICE,

The following warning applies to all Model 381

1 modems.

WARNING

THE

MODEL 381 THE SAME TYPE RECOMMENDED BY THE MANUFACTURER. DISCARD USED BATTERIES ACCORDING TO THE MANUFACTURER’S INSTRUCTIONS.

LE MODÈLE 381 UNE BATTERIE DU MÊME TYPE OU D’UN TYPE RECOMMANDÉ PAR LE CONSTRUCTEUR. METTRE AU RÉBUT LES BATTERIES USAGÉES CONFORMÉMENT AUX INSTRUCTIONS DU FABRICANT.

1 IS PROVIDED WITH A REPLACEABLE LITHIUM BATTERY. REPLACE THE BATTERY ONLY WITH

1 EST FOURNI AVEC UNE PILE AU LITHIUM REMPLAÇABLE REMPLACER UNIQUEMENT AVEC

C November 1996 3810-A2-GB30-20

Page 5

Government Requirements and Equipment Return

Certain governments require that instructions pertaining to modem connection to the public switched telephone network be included in the installation and operation manual. Specific instructions are listed in the following sections.

United States

Notice to Users of the Public Switched Telephone Network

Safety Instructions

1. This

3. The Ringer Equivalence (REN) is used to determine the quantity of devices which may be

4. If the 3800 Series modem causes harm to the telephone network, the telephone company will

5. The telephone company may make changes in its facilities, equipment, operations, or procedures

equipment complies with Part 68 of the FCC rules. On the equipment is a label that contains, among other information, the FCC registration number and ringer equivalence number (REN) for this equipment. The label is located on the bottom of the Model 3810 and 3820 modems. This label is located on the Model 3811’s circuit card assembly provided to the telephone company.

Page A of this manual contains the Universal Service Order Codes (USOC) associated with the services on which the equipment is to be connected.

connected to the telephone line. Excessive RENs on the telephone line may result in the devices not ringing in response to an incoming call. In most, but not all areas, the sum of the RENs should not exceed five (5.0). To be certain of the number of devices that may be connected to the line, as determined by the total RENs, contact the telephone company to determine the maximum RENs for the calling area.

notify you in advance that temporary discontinuance of service may be required. But if advance notice is not practical, the telephone company will notify the customer as soon as possible. Also, you will be advised of your right to file a complaint with the FCC if you believe it is necessary.

that could affect the operation of the equipment. If this happens, the telephone company will provide advance notice in order for you to make the necessary modifications in order to maintain uninterrupted service.

. If requested, this information must be

6. If you experience trouble with this equipment, please contact your sales or service representative (as appropriate) for repair or warranty information. If the product needs to be returned to the company service center for repair, contact them directly for return instructions using one of the following methods:

• Via the Internet:

ia T

• V

If the trouble is causing harm to the telephone network, the telephone company may request that you remove the equipment from the network until the problem is resolved.

elephone: Call our automated call system to receive current information via fax or to speak with

a company representative. — Within the U.S.A., call 1-800-870-2221 — International, call 813-530-2340

7. The user is not authorized to repair or modify the equipment.

isit the Paradyne World W

ide W

eb site at http://www

.paradyne.com

D3810-A2-GB30-20 November 1996

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COMSPHERE 3800 Series Modems

8. This equipment cannot be used on public coin service provided by the telephone company. Connection to Party Line Service is subject to state tariffs. (Contact the state public utility commission, public service commission or corporation commission for information.)

9. The Telephone Consumer Protection Act of 1991 makes it unlawful for any person to use a computer or other electronic device to send any message via a telephone fax machine unless such a message clearly contains, in a mar page of the transmission, the date and time it is sent, and an identification of the business, or other entity other entity, or individual.

In order to program this information, follow the steps outlined in the manual supplied with your fax software.

10. An FCC compliant telephone cord with modular plugs may be provided with this equipment. This equipment is designed to be connected to the telephone network or premises wiring using a compatible modular jack which is Part 68 compliant.

Canada

gin at the top or bottom of each transmitted page, or on the first

, or other individual sending the message, and the telephone number of such business, or

Notice to Users of the Canadian Public Switched Telephone Network

The Canadian Department of Communications label identifies certified equipment. This certification means that the equipment meets certain telecommunications network protective, operational and safety requirements. The Department does not guarantee the equipment will operate to the user’s satisfaction.

Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of the local telecommunications company

. The equipment must also be installed using an acceptable method of connection. In some cases, the company’ line individual service may be extended by means of a certified connector assembly (telephone extension cord). The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations.

s inside wiring associated with a single

E November 1996 3810-A2-GB30-20

Page 7

Safety Instructions

Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier

. Any repairs or alterations made by the user to this equipment, or equipment malfunctions, may give the telecommunications company cause to request the user to disconnect the equipment.

Users should ensure for their own protection that the electrical ground connections of the power utility, telephone line and internal metallic water pipe system, if present, are connected together. This precaution may be particularly important in rural areas.

CAUTION

Users should not attempt to make such connections themselves, but should contact the appropriate electric inspection authority, or electrician, as appropriate.

The Load Number for this equipment is listed on the label on the modem. The Load Number (LN) assigned to each terminal device denotes the percentage of the total load to be connected to a telephone loop which is used by the device to prevent overloading. The termination on a loop may consist of any combination of devices subject only to the requirement that the total of the Load Numbers of all devices does not exceed 100.

If your equipment is in need of repair, refer to the procedures described on page A in the front of this document for contact information.

F3810-A2-GB30-20 November 1996

Page 8

Preface

Objectives How to Use This Manual Related Documents

and Reader Assumptions

1. Introduction

Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3800 Series Models

2. Model 3810 and 3820 Installation

Overview 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3800 Series Modem Package Model 3810 or Model 3820 Modem Installation

DTE Connection 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dial Network Connection 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model 3810 Dial-Line Connection 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model 3820 Dial-Line Connection 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model 3810 4-Wire/2-Wire Leased-Line Connection 2-7. . . . . . . . . . . . . .

Model 3820 2-Wire Leased-Line Connection 2-7. . . . . . . . . . . . . . . . . . . .

Model 3810 and Model 3820 T Dial Network Management System Connection

AC Power Transformer Connection 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . .

Modem Power-Up 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing and Replacing Model 3810 and Model 3820 Modems

elephone Connection

vii. . . . . . . . . . . . . . . . . . . . . . . . . . .

vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3. . . . . . . . . . . . . . . . . .

2-7. . . . . . . . . . . . . .

2-7. . . . . . . . . . . . . . . . . .

2-8. . . .

3. Model 3811 Installation

Overview 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model 381 Removing and Replacing Model 381

1 Installation 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Modems

3-4. . . . . . . . . . . . . . . . . .

i3810-A2-GB30-20 November 1996

Page 9

COMSPHERE 3800 Series Modems

4. DCP Operation

5. Call Setup Branch

6. Talk/Data Branch

Overview 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagnostic Control Panels

Status Indicators 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagnostic Control Panel Operation 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . .

Menu Structure 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting Factory Configuration Options 4-13. . . . . . . . . . . . . . . . . . . . . . .

Diagnostic Control Panel Security Access

Overview 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Call Setup Branch

Overview 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

alk/Data Branch

4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-15. . . . . . . . . . . . . . . . . . . . . .

5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7. Status Branch

Overview 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Status Branch

8. Test Branch

Overview 8-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

est Branch

9. Configure Branch

Overview 9-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configure Branch 9-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuration Tables 9-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Security Configuration Options 9-46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10. Control Branch

Overview 10-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Control Branch 10-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Automatic Firmware Download 10-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11. Remote Branch

7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview 11-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Remote Branch

ii November 1996 3810-A2-GB30-20

11-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page 10

12. Security

Overview 12-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Security Branch 12-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Security Password Entry Techniques 12-11. . . . . . . . . . . . . . . . . . . . . . . . . . .

Database T

able Examples

13. Fax Operation

Overview 13-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fax Operation 13-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14. AT Command Set and S-Registers

Overview 14-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Modes Command Guidelines

AT Command List 14-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

S-Register List 14-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents

12-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendices

Glossary

Index

A. Menu Tree A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Result Codes

C. Troubleshooting C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

echnical Specifications

D. T

Pin Assignments

E. F. CCITT V

G. Default Configuration Options G-1. . . . . . . . . . . . . . . . . . . . . . . . . . .

H. Equipment List H-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

.25bis Dialing Commands and Response

B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

F-1. . . . . . . . . . . .

iii3810-A2-GB30-20 November 1996

Page 11

COMSPHERE 3800 Series Modems

Figure Page

2-1 Model 3810 and 3820 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2 2-3 3-1 3-2

3-3 Circuit Pack Lock 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1 4-2 4-3 Optional SDCP 4-4 5-1

8-1 Local Analog Loopback 8-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-2 Remote Digital Loopback 8-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-3 Local Digital Loopback 8-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-4 Pattern Test and Local Analog Loopback Test 8-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-5 Pattern Test and Remote Digital Loopback Test 8-6. . . . . . . . . . . . . . . . . . . . . . . . . . . .

8-6 End-to-End Pattern Test 8-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-1 DCP Configuration Process 9-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-2 AT Command Configuration Process 9-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11-1 Top-Level Menu of a Remote 3800 Series Modem 11-3. . . . . . . . . . . . . . . . . . . . . . . . . .

E-1 Wiring Diagram – 8-Position to 6-Position Crossover Cable E-4. . . . . . . . . . . . . . . . . .

List of Figures

Model 3810 Rear Panel Model 3820 Rear Panel Model 381 Installing a Model 381

Model 3810 DCP Model 3820 DCP

3800 Series LCD and Keypad Dial Backup

1 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Modem

, Model 381

1 Faceplate, and Optional SDU 4-3. . . . . . . . . . . . . . . . . . .

2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iv November 1996 3810-A2-GB30-20

Page 12

Table of Contents

List of Tables

Tables Page

4-1 Model

4-2 Model 3820 DCP LEDs 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-3 SDCP LEDs 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-4 Top-Level Menu Status 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-5 4-6

5-1 Valid Dial Command Modifiers 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-1 DTE Interface Configuration Options 9-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-2 DTE Dialer Configuration Options 9-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-3 Line Dialer Configuration Options 9-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-4 Dial Line Configuration Options 9-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-5 Leased Line Configuration Options 9-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-6 V.42/MNP/Buffer Configuration Options 9-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-7 Test Configuration Options 9-40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-8

9-9 Security Configuration Options 9-46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12-1 Edit Password Table Group Options 12-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12-2 Set Answer Security Group Options 12-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12-3 Set Originate Security Group Options 12-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12-4 Security Database T

12-5 Security Database Table Using DTE-Side Passwords 12-13. . . . . . . . . . . . . . . . . . . . . . . .

12-6 Security Database Table Using Both VF-Side and DTE-Side Passwords 12-13. . . . . . . . .

12-7 Security Database Table Using Paired VF-Side and DTE-Side Passwords 12-14. . . . . . .

14-1 3800 Series A 14-2 B-1 C-1

C-2 Modem – DTE Connection C-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C-3

C-4 Online Operation C-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C-5 Leased-Line Operation C-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C-6

D-1 Technical Specifications for 3800 Series Modems D-1. . . . . . . . . . . . . . . . . . . . . . . . . .

E-1 EIA-232-D Pin Assignments E-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

E-2 EIA RS-366-A Pin Assignments E-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

E-3 E-4 F-1 V F-2 V

G-1 Factory Default Configuration Options G-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3810 and Model 381

Common Operational Messages Dial Access Security Messages

Miscellaneous Configuration Options

able Using VF-Side Passwords

T Commands 3800 Series S-Registers Result Codes Modem Health

Modem – VF Connection

Dial Backup Operation

VF Connector Pin Assignments: Models 3810 and 3820 VF Connector Pin Assignments: TELCO Jacks

.25bis Commands .25bis Response Messages

1 DCP LEDs 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12-12. . . . . . . . . . . . . . . . . . . . . . . . .

14-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

E-5. . . . . . . . . . . . . . . . . . . . .

E-5. . . . . . . . . . . . . . . . . . . . . . . . . . . .

F-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

F-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

v3810-A2-GB30-20 November 1996

Page 13

Preface

Objectives and Reader Assumptions

This

manual describes how to install and operate the COMSPHEREr carrier

-mounted modems. It is assumed that you have a

basic understanding of modems and their operation.

3800 Series standalone and

How to Use This Manual

Chapter 1 provides information about the 3800 Series

modems’ features.

Chapter 2 and Chapter 3 provide instructions for

installing the 3800 Series modems.

Chapter 4 provides the information required to operate the Model 3810 and Model 3820 using the diagnostic control panel (DCP) and the Model 381 COMSPHERE 3000 Series Carrier’ control panel (SDCP).

Chapters 5 through 12 describe the eight branches of the front panel command sets: Call Setup, Talk/Data, Status, Test, Configure, Control, Remote, and Security.

Chapter 13 provides an overview of fax modem operation.

Chapter 14 provides instructions for displaying and changing A

Appendix A provides a menu tree for 3800 Series modems.

T commands and S-registers.

1 using the

s shared diagnostic

Appendix C provides instructions for performing diagnostic tests when data communications problems occur.

Appendix D provides technical specifications.

Appendix E provides EIA RS-232, EIA RS-366A, and VF TELCO pin assignments.

Appendix F provides V.25bis dialing information.

Appendix G provides a list of all default configuration options available for the four factory preset configurations: Async Dial, Sync Dial, Sync Leased, and UNIX Dial.

Appendix H provides an equipment list for 3800 Series modems.

The Glossary provides a description of terms used throughout this manual.

A reference card is inserted inside the back cover.

Introduction

Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3800 Series Models 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview

The COMSPHERE 3800 generation of full-feature, high-speed dial modems, offer reliable asynchronous and synchronous operation over dial- or leased-lines networks. The 3800 Series modems’ unique software defineability allows for the addition of future enhancements, whether it is installing new features or firmware upgrades.

Through its downloading capability, any 3800 Series modem can be upgraded to the latest firmware, requiring no new hardware investment or on-site personnel, and little or no downtime. These modems support a wide range of modulation schemes and offer control using either AT commands, the user-friendly diagnostic control panel (DCP) or the optional COMSPHERE 6700 Series Network Management System (NMS). The NMS performs extensive monitoring, testing, reporting, and restoral functions to assist in managing your network.

High-speed data transfer and reliable throughput at data rates as high as 19,200 bps (V is guaranteed by employing the latest techniques in CCITT V CCITT V.42/MNP error correction. In addition to fast line speeds, the modem can send data to the DTE at speeds as high as 1

.42bis/MNP Class 5 data compression and

15,200 bps.

Series modems, a new

.32terbo) over dial lines

The 3800 Series modem is extremely versatile when used in modem pooling environments; it allows multiple users to temporarily customize settings in the 3800 Series modem, thereby permitting communication with the calling modem. Upon disconnection, the 3800 Series modem falls back to its original configuration settings and resumes normal operation.

The modem’s compatibility with a number of dialing methods and protocols, such as asynchronous A commands, CCITT V.25bis dialing, EIA RS-366-A dialing for carrier-mounted modems, and the user-friendly diagnostic control panel (DCP), permits the 3800 Series modem to be used in a variety of applications and environments while also allowing control over modem configuration, dialing, and diagnostics. The 3800 Series modems offer four preset factory configurations containing the most often used modem settings. These factory presets provide quick configuration for any asynchronous/ synchronous dial, synchronous leased, or UNIXr hardware-based dial environments.

The 3800 Series family is available in three models: the Model 3810, a 4-wire/2-wire standalone modem; the Model 381 unit; and the Model 3820, a 2-wire standalone unit. All three models offer a variety of modulation schemes and network enhancements while still providing reliable, high-speed data transmission using the latest in modem technology.

1, a carrier- mounted version of the standalone

1-13810-A2-GB30-20 November 1996

Page 15

COMSPHERE 3800 Series Modems

Features

The 3800 Series modems have a wide variety of

features.

High-speed transmission using asynchronous,

•

synchronous, or UNIX devices over full- or half-duplex dial networks or 2-wire/4-wire leased lines.

• Dial-Line Modulations: V.32terbo (19,200 and

16,800 bps), CCITT V.32bis (14,400, 12,000, 9600, 7200, and 4800 bps), V.32 (9600 and 4800 bps), V.22bis (2400 bps), V.22 (1200 bps), V.21 (300 bps), Bell 212A, (1200 bps), and Bell 103J (300 bps).

• Two-wire/four-wire Leased-Line Modulations:

V.32terbo (19,200 and 16,800 bps), V.32bis (14,400, 12,000, 9600, 7200, and 4800 bps), V.32 (9600 and 4800 bps), V.22bis (2400 bps).

• Convenient migration to new or optional features

through software downloading.

• CCITT V

• Virtual error free data integrity with CCITT V.42

and MNP Level 4 error control. Automatic and manual single call dial backup and

•

dial standby capabilities for 4-wire leased-line applications (Model 3810 and Model 381

• A unique Paradyne modem pooling feature that

preserves the answering modem’ configuration, but allows multiple users to temporarily adapt parameters for individual requirements.

• Dial-line data rates from 300 bps–19,200 bps.

Leased-line rates from 2400 bps–19,200 bps.

• Asynchronous dial DTE data rates from

300 bps–115,200 bps.

.42bis and MNP Class 5 data compression.

1).

s permanent

• Complement of self-tests, local and remote

loopbacks including CCITT compatible V.54.

• Four factory-defined configurations and two

user-defined configuration areas.

• Availability in either the 2-wire/4-wire standalone

and carrier mount, or the 2-wire only standalone models.

• Originate Security and three Answer Security

modes.

• Directory #1 Callback capability.

Dial Access Security which guards against

•

unwanted user access to the host DTE.

•

Hayes Autosync support.

Options

The 3800 Series modems also may have the following optional features:

• Diagnostic, control, monitor

capabilities through the COMSPHERE 6700 Series NMS.

Class 2 Fax modulations: CCITT V

•

12,000, 9600, 7200 bps), V.29 (9600, 7200 bps) and V.27ter (4800, 2400 bps).

, and call statistic

.17 (14,400,

• A diagnostic control panel (DCP) on the front bezel

that displays the connect status, data rate, type of error control or compression, test results, alarm status of DTE or VF parameters for both local and remote modems.

• Storage of up to 10 telephone numbers to directory

locations.

• Compatibility with the industry de facto standard

T Command set.

•

Dialing via DCP, A commands, or RS-366-A (Model 3811 only).

• Configuration of software options via the

AT Command set or DCP.

1-2 November 1996 3810-A2-GB30-20

T commands, CCITT V.25bis

COMSPHERE 3800 Series Models

The COMSPHERE 3800 Series modem is available in several models.

• Model 3810, a 4-wire/2-wire standalone unit

capable of operation on 2-wire dial, or 4-wire leased or 2-wire leased lines.

•

Model 381 modem for installation into a COMSPHERE 3000 Series Carrier; it is capable of operation on dial, or 4-wire leased or 2-wire leased lines.

• Model 3820, a 2-wire standalone unit capable of

operation on dial or 2-wire leased lines.

1, a 4-wire/2-wire carrier-mounted

Page 16

Model 3810 and 3820 Installation

Overview 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3800 Series Modem Package 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Customer-Supplied Equipment 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model 3810 or Model 3820 Modem Installation 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connecting Model 3810 and Model 3820 Modems with Supplied Cables 2-4. . . . . . . . . . . . . . . . . . . . .

DTE Connection 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dial Network Connection 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model 3810 Dial-Line Connection 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model 3820 Dial-Line Connection 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model 3810 4-Wire/2-Wire Leased-Line Connection 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model 3820 2-Wire Leased-Line Connection 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model 3810 and Model 3820 Telephone Connection 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dial Network Management System Connection 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AC Power Transformer Connection 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Modem Power-Up 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing and Replacing Model 3810 and Model 3820 Modems 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview

The standalone Model 3810 modem (Figure 2-1) is capable of either dial or 4-wire/2-wire leased-line operation. The modem is controlled using either AT commands or the diagnostic control panel (DCP). The DCP consists of an LCD which displays the T menu, three function keys and four directional keys which allow you to maneuver and choose DCP selections, and a row of 12 LED status indicators which display modem activity. For a better understanding of DCP operation, refer to Chapter 4,

The rear of the modem contains an ON/Off power switch, a low voltage ac power connector modular connector for phone or leased-line connection, an

DCP Operation

op-Level

, an 8-pin

8-pin modular connector for dial-line connection, a 4-pin modular connector for network management, and a DB-25-S DTE connector.

The standalone Model 3820 is capable of dial and 2-wire leased-line operation. Its DCP functions are similar to the Model 3810 except it has only six LED status indicators. For more information regarding the DCP, refer to Chapter 4,

The rear of the modem contains an ON/Off power switch, a low voltage ac power connector modular connector for external telephone use, an 8-pin modular connector for dial-line or 2-wire leased-line connection, a 4-pin modular connector for network management, and a DB-25-S DTE connector.

DCP Operation

, an 8-pin

2-13810-A2-GB30-20 November 1996

Page 17

COMSPHERE 3800 Series Modems

DIAGNOSTIC

CONTROL

PANEL

SPEAKER

INDICATORS

LCD AND KEYPAD

STATUS

AC TRANSFORMER

Figure 2-1. Model 3810 and 3820

3800 Series Modem Package

After opening the modem’

and verify that the following items are present:

• Manual and reference card

• Model 3810 or Model 3820 modem

• Power transformer

• One 6-position, 4-wire modular cord (Model 3810

and Model 3820)

s package, check for damage

EIA-232-D

INTERFACE

NMS

DIAL/LEASED (3820)

PHONE/LEASED (3810)

AC POWER IN

ON/OFF

496-13096-02

• One 8-position, 8-wire modular cord (Model 3810

only)

• One ferrite choke and cable tie

• Fax software and documentation (if fax option

installed)

If any hardware components are damaged, notify your sales or service representative. Refer to page A in the front of this document for contact information.

2-2 November 1996 3810-A2-GB30-20

Page 18

Model 3810 and 3820 Installation

Customer-Supplied Equipment

The following customer required to complete a data communications system using either the Model 3810 or Model 3820 modem:

• A DTE with an available EIA-232-D serial port.

• A standard EIA-232-D male-to-female cable with a

male DB-25-S connector at one end to attach to the modem.

• One of the following modular dial or leased

network interfaces: — RJ45S for dial programmable applications — RJ1 — An 8-position to 6-position crossover cable for

The following customer required for the installation of a Model 3811 modem:

• A COMSPHERE 3000 Series Carrier.

• A male-to-female 50-pin mass termination cable.

One Network Interface Module (NIM) for modems installed in Slots 1–8 and one NIM for modems installed in Slots 9–16 (required for dial-line applications).

• One of the following modular or 50-pin dial or

leased network interfaces: — RJ11C for single line dial permissive

— RJ45S for single line dial programmable

— RJ21X for multiple line dial permissive

— RJ27X for multiple line programmable

1C for dial permissive applications

JM8 leased-line applications only

applications

-supplied equipment is

If the modem is to be managed by a network management system, a Shared Diagnostic Unit (SDU) must be supplied and properly connected to the network management controller. For proper network management connection to the SDU, refer to the COMSPHERE

6700 Series Network Management System User’s Guide

For installation of the 3000 Series Carrier into a cabinet, refer to the

Installation Manual.

COMSPHERE 3000 Series Carrier

Model 3810 or Model 3820 Modem Installation

Before

installing your standalone modem, make sure your installation site is clean and well-ventilated. Allow space around the modem for installing cables and telephone cords, and make sure the modem is located within reach of the ac power outlet. The distance between your modem and DTE should be minimized if DTE data rates exceed 19,200 bps. Also, low capacitance cables may be necessary for speeds greater than 19,200 bps or distances greater than 50 feet.

The rear panel of both the Model 3810 and Model 3820 modems have the following switches and connectors (see Figures 2-2 and 2-3 which appear later in this chapter):

• An ON/Off power switch.

• A 5-pin DIN type power receptacle for ac power

transformer.

• An 8-pin modular keyed jack for 4-wire/2-wire

leased lines or external telephone set on the Model 3810. On the Model 3820, this jack is for external telephone set use only

• An 8-pin modular keyed jack for dial (Public

Switched Telephone Network, or PSTN) lines on the Model 3810. On the Model 3820, this jack is for dial or 2-wire leased lines.

— 66 punchdown block or other demarcation

device

• One 6-position to 6-position modular cord (required

for network management applications).

• A Shared Diagnostic Unit (SDU) (required for

network management applications).

• A 4-pin modular jack for Network Management

System (NMS) connection for future release.

• A 25-pin DB-25-S receptacle for DTE interface.

2-33810-A2-GB30-20 November 1996

Page 19

COMSPHERE 3800 Series Modems

Connecting Model 3810 and Model 3820 Modems with Supplied Cables

Figure 2-2 and Figure 2-3 show how Model 3810 and Model 3820 modems are connected to certain TELCO jack types using the supplied cables. For other TELCO connections, refer to Appendix E.

DTE Connection

Use the following procedures to connect the EIA-232-D cable and ferrite choke from the modem to the DTE:

Make sure the modem’

1. Off.

2. Connect the DB-25-P (male) connector on the cable to the DB-25-S (female) connector labeled DTE (Figures 2-2 and 2-3) on the modem’s rear panel. Use a small screwdriver to tighten the cable to the modem.

3. Connect the DB-25-P connector on the cable to the DB-25-S connector on the DTE. Use a small screwdriver to tighten the cable to the DTE.

s rear panel power switch is

Figure 2-2. Model 3810 Rear Panel

2-4 November 1996 3810-A2-GB30-20

Page 20

Model 3810 and 3820 Installation

ensure compliance with FCC Part 15 Regulations, a ferrite choke must be installed on the EIA-232-D interface cable.

1. Open the ferrite choke and place it around the DTE cable as close as possible to the connector attached to the modem.

Close the two halves around the cable and snap the ferrite choke shut, pressing down on the plastic latch to secure it.

3. Install a cable tie behind the ferrite choke to prevent it from sliding along the cable.

Figure 2-3. Model 3820 Rear Panel

2-53810-A2-GB30-20 November 1996

Page 21

COMSPHERE 3800 Series Modems

Dial Network Connection

The telephone company provides the line termination jacks for the type of service you request. Y to operate in either Permissive or Programmable mode. Advance coordination with the telephone company is suggested when connecting the modem to telephone dial lines (PSTN).

If you operate in the Permissive mode, the modem’s transmit output level is fixed at approximately –9 dBm. The telephone company assumes that the line loss is 3 dBm and no compensation is provided for additional losses. The resulting level at the telephone central of could be lower than the nominal –12 dBm provided with Programmable mode. A Permissive mode telephone line is usually terminated with a USOC RJ1

If you operate in the Programmable mode, the telephone company installs a program resistor that adjusts the modem’ telephone company’s central office is at the maximum allowable level of –12 dBm. Telephone lines for the Programmable mode are usually terminated with a USOC RJ45S jack or an RJ41S jack switched to Programmable.

s output level so that the signal entering the

ou may choose

fice

1C jack.

Model 3810 Dial-Line Connection

For the Model 3810, use the following procedures to

connect the modem to the dial network interface:

ogrammable mode

1. Insert the 8-position, 8-conductor modular plug into the jack labeled DIAL/LEASED (3820), Figure 2-2.

2. Insert the other end of the modular cord into the dial network interface.

Permissive mode

1. Insert the 6-position, 4-conductor modular plug into the jack labeled DIAL/LEASED (3820), Figure 2-2.

2. Insert the other end of the modular cord into the dial network interface.

NOTE

The modem is shipped with the Async Dial factory preset configuration stored in memory. This factory preset configures the modem for Permissive mode. To operate in Programmable mode, you must change the Dial Transmit Level configuration option using either the DCP (refer to the Dial Line configuration options in Chapter 9, the AT&J command (refer to Chapter 14,

and S-Registers

Configure Branch)

AT Command Set

Model 3820 Dial-Line Connection

Use the following procedures to connect a Model 3820

to the dial network interface:

Permissive mode

1. Insert the 6-position, 4-conductor modular plug into the jack labeled DIAL/LEASED (3820), Figure 2-3.

2. Insert the other end of the modular cord into the dial network interface.

2-6 November 1996 3810-A2-GB30-20

Page 22

Model 3810 and 3820 Installation

Model 3810 4-Wire/2-Wire Leased-Line Connection

Use the following procedures to connect a Model 3810

to the leased-line network interface:

1. Insert the 8-position, 8-conductor modular plug into the jack labeled PHONE/LEASED (3810), Figure 2-2.

2. Insert the other end of the modular cord into the leased-line network interface.

3. If the Model 3810 has a dial backup line, follow the steps listed in

Connection

Model 3810 Dial-Line

section.

Model 3820 2-Wire Leased-Line Connection

Use the following procedures to connect a Model 3820 modem to the 6-pin, center pair, leased-line network interface. For 2-wire leased line connection to a JM8 network interface, refer to Figure E-1 in Appendix E:

Dial Network Management System Connection

For

Model 3810 and 3820 modems, use the following procedures to connect the modem to the network management system interface:

1. Insert the subminiature 4-conductor modular plug of the 3600 Hubbing Device into the jack labeled NMS (Figure 2-2 or 2-3).

2. Connect the 3600 Hubbing Device to the network management system.

Refer to the 3600-F3-300 Installation Instructions (3610-A2-GZ45) for more information. Installation for the Model 3810 and 3820 modems is the same as for the 3610 DSU.

3600 Hubbing Device Featur

e Number

AC Power Transformer Connection

Use the following procedures to connect the modem to an ac power outlet:

1. Insert the 6-position, 4-conductor modular plug into the jack labeled DIAL/LEASED (3820), Figure 2-3.

2. Insert the other end of the modular cord into the leased-line network interface.

Model 3810 and Model 3820 Telephone Connection

Use the following procedures to connect the modem to

a telephone:

1. Insert the 6-position, 4-conductor modular plug into the jack labeled PHONE/LEASED (3810).

2. Insert the other end of the modular cord into the telephone.

Make sure the modem’ position.

2. Insert the power transformer’s 5-pin DIN male connector into the modem’s rear panel ac power receptacle (Figures 2-2 and 2-3).

3. Insert the power transformer into a grounded ac power outlet.

s power switch is in the Of

2-73810-A2-GB30-20 November 1996

Page 23

COMSPHERE 3800 Series Modems

Modem Power-Up

Once your modem is properly connected to the DTE, dial and/or leased lines, and ac outlet, press the modem’ rear panel power switch to the ON position. The modem begins a power-up self-test. This test takes several seconds to perform, and verifies the operation of most hardware components within the modem. If successful, the LCD displays to the Top-Level menu screen.

If a failure occurs during the self-test, the LCD displays The LCD then displays the Top-Level menu screen with the message the LCD. Although a failure has occurred, the modem will attempt to operate. This allows you to activate a more thorough self-test using the Test branch. Refer to Chapter 8, T

Power On Selftst Failed

Power On Selftst Passed

Power on Fail appearing on the top line of

est Branch

for several seconds.

and continues

Removing and Replacing Model 3810 and Model 3820 Modems

To remove and replace a Model 3810 or Model 3820

modem, perform the following steps:

Make sure the modem is of modem’s rear panel power switch to the Off position.

2. Disconnect the power cord from the ac power outlet, and then from the connector on the rear of the modem.

Disconnect the dial and leased-line modular cords

3. from the modem’s rear panel.

4. Disconnect the DTE interface cable from the modem’s rear panel.

If the modem is to be removed for service, return it using the procedures on page A in the front of this document for contact information.

Install the replacement modem as described in the

Model 3810 or Model 3820 Modem Installation

section of this chapter way as the modem being replaced.

fline, and press the

, and configure it the same

2-8 November 1996 3810-A2-GB30-20

Page 24

Model 3811 Installation

Overview 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model 3811 Installation 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Removing and Replacing Model 3811 Modems 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview

The carrier-mounted Model 3811 modem (Figure 3-1) is capable of dial or 4-wire/2-wire leased-line operation and installs into a COMSPHERE 3000 Series Carrier. The Model 381 displaying modem activity and an audio speaker jack for the carrier’

The Model 3811 modem’s rear has two DTE edge card connectors that mount into a connector plate located on the rear of the carrier DB-25-S connectors, one providing an EIA RS-232 DTE interface and one providing an EIA RS-366A DTE interface. The Model 3811 derives ac power from the COMSPHERE 3000 Series Carrier’ common bus to all devices installed in the carrier. The user interface to any Model 3811 is through the shared diagnostic control panel (SDCP), an optional feature

1’s faceplate has 16 LED status indicators for

s optional speaker

. This connector plate has two

s backplane which is a

similar to the DCPs on the Model 3810 and Model 3820. For a better understanding of DCP operation, refer to Chapter 4,

The COMSPHERE 3000 Series Carrier has a total of 17 slots. The first slot, Slot 0, is reserved for the Shared Diagnostic Unit (SDU) while the remaining 16 slots can house up to 16 Model 381 networks, a combination of Model 381 Model 361 circuit card that provides SDCP and network management interfaces to modems and DSUs installed in the carrier. SDUs are only required if a single SDCP is used by multiple COMSPHERE 3000 Series Carriers in a cabinet or if a network management system (NMS) is used.

For more details on the COMSPHERE 3000 Series Carrier, refer to the

Installation Manual.

DCP Operation

1 Data Service Units (DSUs). An SDU is a

1 modems, or for mixed

1 modems and

COMSPHERE 3000 Series Carrier

3-13810-A2-GB30-20 November 1996

Page 25

COMSPHERE 3800 Series Modems

FACEPLATE

Status

Pwr Alrm

142

Test Dial

125

RI Busy

Serv

103

TXD

104

RXD

105

RTS

106

CTS

107

DSR

108

DTR

109

LSD

Front Panel

Spkr

EIA-232/V.24

CONNECTOR

EIA-232/V.24

EDGE CARD

CONNECTOR

RS-366A/V.25

EDGE CARD

CONNECTOR

REAR

CONNECTOR

PLATE

EIA232/V.24

(3800)

RS366A/V.25

RS-366A/V.25

CONNECTOR

(3600/3500)

V.35

3811

496-13155-02

Figure 3-1. Model 3811

Model 3811 Installation

The

Model 381 COMSPHERE 3000 Series Carrier which supplies operating power and the dial and/or leased-line network connections.

leased-line, NIM, and network management cabling information, refer to the Carrier, Installation Manual.

1 is designed for installation in a

For correct power, DTE, dial-line,

COMSPHERE 3000 Series

The COMSPHERE 3000 Series Carrier has 17 slots which can hold up to 16 modems and one Shared Diagnostic Unit (SDU). The SDU is required when the modems in the carrier are controlled by an NMS, or when multiple carriers in a cabinet configuration are to be controlled by a single shared diagnostic control panel (SDCP). The SDCP of the COMSPHERE 3000 Series Carrier is the user interface to the Model 3811 modem. A single SDCP can control up to eight carriers containing up to 128 compatible modems.

3-2 November 1996 3810-A2-GB30-20

Page 26

The

installation of a Model 381

1 varies slightly if an SDCP is installed on the front of the carrier. T Model 381

1 modem into the carrier without an SDCP,

perform the following steps:

o install a

Model 3811 Installation

2. At the front of the carrier, hold the modem vertically, with the latch on its faceplate in the open position, and insert it into the top and bottom card guides of one of the slots numbered 1–16 (see Figure 3-2).

CAUTION

If the Model 3811 is removed from the carrier, always use a ground strap when handling the modem. Always store the Model 3811 in an antistatic bag when it is removed from the carrier.

1. At the rear of the carrier install the rear connector plate. Make sure the plate uses the same slot position as that intended for the modem.

Loosely fasten the plate. This allows for slight adjustments later when installing the modem.

Slide the modem into the slot, aligning the modem with the rear connector plate, until the backplane connector and DTE connector seat firmly into the back of the carrier. The faceplate latch automatically closes as you push the modem into the carrier. To lock the modem into the carrier, press the faceplate latch until a click is heard.

3. If the carrier is ON, the Power LED on the

faceplate of the 381 the modem completes its power

1 lights. After several seconds

-up self-test in

which all faceplate LEDs light. If the modem fails, the Alrm LED on the faceplate flashes.

Return to the rear of the carrier and tighten the rear connector plate.

Figure 3-2. Installing a Model 3811 Modem

3-33810-A2-GB30-20 November 1996

Page 27

COMSPHERE 3800 Series Modems

the modem is to communicate with an installed SDCP, install the modem as described above and perform the following steps:

Press the

key on the SDCP

Select

. The cursor

appears in the carrier selection entry.

2. Press the F1 (") or F2 (↓) key until the carrier

number you want appears on the LCD. The carrier number selection has a range of 1 to 8

since a single SDCP can control a configuration of up to eight carriers. (This is only possible if the SDU is installed.)

Press the selection entry

key to position the cursor on the slot

4. Press the F1 (") or F2 (↓) key until the slot

number (1–16) you want appears on the LCD. Ignore the AB designator that appears on the LCD since it is not applicable to the 3800 Series modems.

Press the

key to place the SDCP in direct

Select

communication with the selected modem. The LCD displays the Top-Level menu for the

selected modem. In addition, the Front Panel LED on the modem’s faceplate and the OK LED on the SDCP light.

6. Once you have determined that the modem is installed properly and completed its power-up self-test, rotate the circuit pack lock until it covers the faceplate latch (Figure 3-3). This prevents the modem from accidently being removed once it is installed in a carrier.

CIRCUIT

CARD

GUIDE

CLOSED

(LOCKED)

OPEN

(UNLOCKED)

CIRCUIT

PACK LOCK

LATCH

CIRCUIT

CARD

GUIDE

495-11985a-03

Figure 3-3. Circuit Pack Lock

Removing and Replacing Model 3811 Modems

It is not necessary to power down the carrier to remove and replace a Model 381 steps:

1 modem. Perform the following

7. Configure the modem as described in the Selecting

Factory Configuration Options

section in

Chapter 4.

If the Model 3811 is removed from the carrier, always use a

CAUTION

ground strap when handling the modem. Always store the Model 3811 in an antistatic bag when it is removed from the carrier.

1. Rotate

the circuit pack lock until the release tab is

exposed.

Press down on the release tab and pull the modem away from the carrier’

3-4 November 1996 3810-A2-GB30-20

s backplane.

Page 28

DCP Operation

Overview 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagnostic Control Panels 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Models 3810 and 3820 Diagnostic Control Panels 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model 3811 Faceplate and Shared Diagnostic Control Panel 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Status Indicators 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagnostic Control Panel Operation 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LCD Display 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hidden Choice Indicators 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Keypad 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Menu Structure 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Top-Level Menu Status and Operational Messages 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selecting Factory Configuration Options 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using the Diagnostic Control Panel 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Using AT Commands 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview

This

chapter describes how to use the diagnostic control panel (DCP) of the 3800 Series modem. It also describes how to select and use each branch of the Top-Level menu tree.

Diagnostic Control Panels

There are two types of DCPs: the front panel on the standalone Model 3810 and Model 3820 modems, and the shared diagnostic control panel (SDCP), an optional feature used with a Model 381 COMSPHERE 3000 Series Carrier two-line, 32-character liquid crystal display (LCD) and keypad through which Top-Level menu branches are accessed to perform the following:

• Initiate and disconnect dial operations

Check modem status

•

• Set up configuration options

Initiate diagnostic tests

•

1 installed in a

. Both DCPs have a

The LCD displays the result of any command initiated using the DCP from an attached asynchronous DTE using the AT command set.

Models 3810 and 3820 Diagnostic Control Panels

The (Figures 4-1 and 4-2) contain status indicators, pushbutton-type keys, and an LCD.

. Most of these operations can be performed

DCPs of the Model 3810 and Model 3820 modems

• Access remote modems through the local modem’s

DCP

4-13810-A2-GB30-20 November 1996

Page 29

COMSPHERE 3800 Series Modems

COMSPHERE 3820

COMSPHERE 3810

F1 F2

CTS TXD LSD RXD

RTS

109

103

106

105

Figure 4-1. Model 3810 DCP

F1 F2

DTR

PWR ALRM

DIAG

108 142

CTS TXD LSD RXD TEST

109

103

106

105

104

SQRTS

496-13068-02

RATE

Figure 4-2. Model 3820 DCP

496-13067-02

4-2 November 1996 3810-A2-GB30-20

Page 30

DCP Operation

Model 3811 Faceplate and Shared Diagnostic Control Panel

The

SDCP

, is used to manage carrier-mounted Model

1 modems. Use the SDCP to issue commands to, view

381 and select configuration options on, or monitor tests for a specific Model 381

1 modem.

Status

OK Alrm

Diag

Out

Status

142

125

103 104 105 106 107 108 109

Front Panel

Spkr

Pwr Alrm Test Dial RI Busy

Serv

TXD RXD RTS CTS DSR DTR LSD

The faceplate of the Model 381

1 contains LED status indicators that monitor the operation of the modem. After the SDCP is connected to the modem, the Front Panel indicator of the selected modem lights to show that the modem is connected.

Figure 4-3 shows the SDCP and the Shared Diagnostic

Unit (SDU) it interfaces with.

SDU

3811

SDU12345678910111213141516

SELECT

KEY

OK Alarm BckUp Test EC

STATUS

INDICATORS

NETWORK

DEVICE

ALARM

DIAL

BACKUP

CARRIER SLOTS 1–16

Select

OK Alarm BckUp Test EC

ERROR

CORRECTION

TEST

MODE

F1 F2 F3

KEYPAD

COMSPHERE 3000

LCD

496-13073-03

Figure 4-3. Optional SDCP, Model 3811 Faceplate, and Optional SDU

4-33810-A2-GB30-20 November 1996

Page 31

COMSPHERE 3800 Series Modems

Status Indicators

The

3800 Series modems’ status indicators continuously provide information on the modem’s operating condition. All of the status indicators on the Model 3810 and Model 3820 appear on the DCP (Figures 4-1 and 4-2), whereas the status indicators for the carrier-mounted Model 3811 are located on the

Model 3811’s faceplate, the SDCP (Figure 4-3).

The standalone Model 3810 modem’ 12 LEDs, and the carrier-mounted Model 381 16 LEDs. These LEDs are listed and described in Table 4-1; LEDs specific to one model type have the appropriate model number shown in the table.

Table 4-1

Model 3810 and Model 3811 DCP LEDs

Label

Pwr green ON. Power is on and the modem is capable of operating. Alrm red

Diag

(3810 only)

DTR/108 green The DTE has turned ON DTR or the modem has forced DTR ON. Test/142 yellow The modem is involved in a test. Normal operation is not possible. Dial

(3811 only)

Color Indicates

Flashing. A malfunction has been detected in either the modem or COMSPHERE 3000 Series Carrier.

green The modem has responded to a diagnostic command from network management.

green Flashing. The modem is attempting to establish a call over the dial network.

ON. The modem has established a dial connection. OFF. A dial connection does not exist.

, and the SDU faceplate

s DCP has

1 has

RI/125

(3811 only)

Busy

(3811 only)

Serv

(3811 only)

SQ yellow The receive telephone line signal is degraded. TXD/103 green The modem is receiving data from the DTE to transmit. (ON equals space.) RXD/104 green Data is being transferred to the DTE. (ON equals space.) RTS/105 green RTS signal is ON. CTS/106 green CTS signal is ON. LSD/109 green The modem has detected a valid carrier signal and is capable of transferring data to the

DSR/107

(3811 only)

Rate

(3810 only)

Front Panel

(3811 only)

green A ringing signal is being received.

yellow ON. The modem is placed in a forced busy condition and is off-hook.

yellow ON. The modem is connected to the carrier service line rather than the normally assigned

dial network.

DTE.

green DSR signal is ON.

yellow ON. The modem is connected at a data rate lower than the data rate it is configured for.

OFF. The modem is connected at its configured data rate.

yellow ON. The modem is connected to the carrier’s SDCP.

4-4 November 1996 3810-A2-GB30-20

Page 32

DCP Operation

DCP LEDs for the standalone Model 3820 are listed

The SDCP LEDs are listed and described in Table 4-3.

and described in Table 4-2.

Table 4-2

Model 3820 DCP LEDs

Label

RTS/105 green RTS signal is ON. CTS/106 green CTS signal is ON. TXD/103 green The modem is receiving data from the DTE to transmit. (ON equals space.) LSD/109 green The modem receiver has detected a valid carrier signal and is capable of transferring data to

RXD/104 green Data is being transferred to the DTE. (ON equals space.) SQ yellow The receive telephone line signal is degraded.

Color Indicates

the DTE.

Table 4-3

SDCP LEDs

Label Color Indicates

OK green Power is ON and the modem is capable of operating. Alrm red The modem has detected a problem with its operation. For example, the modem failed a

self-test.

BckUp yellow The modem, originally configured for leased-line operation, is now operating on dial

networks in a Dial Backup mode.

Test yellow The modem is involved in a test. Normal operation is not possible. EC green Modem is in Error Control mode.

4-53810-A2-GB30-20 November 1996

Page 33

COMSPHERE 3800 Series Modems

Diagnostic Control Panel Operation

The 3800 Series modem’ (DCP) is the user interface to all functions used to configure and control the modem. This interface includes the status light-emitting diodes (LEDs), and a two-line, 32-character liquid crystal display (LCD) and keypad (Figure 4-4).

Use the DCP to display the following kinds of information:

Operational status

•

• Configuration options

DCP entry displays

•

Remote modem access

MOVES UP

E L

EVEL

FROM CURRENT

DISPLAY

Idle:19.2 Call_Setup

s diagnostic control panel

HIDDEN

LCD TOP

LINE

CHOICE

INDICATORS

RETURNS

DISPLAY TO

TOP-LEVEL

Hidden Choice Indicators

The

Hidden Choice Indicators serve as an alert that other selections are available besides what is currently displayed on the LCD. These indicators appear as one of the following symbols:

Right Scroll Indicator

The right scroll indicator displays when more choices are available to the right of what is currently displayed on the LCD.

Left/Right Scroll Indicator

The left/right scroll indicator displays when more choices are available to the left and right of what is currently displayed on the LCD.

Left Scroll Indicator

The left scroll indicator displays when more choices are available to the left of what is currently displayed on the LCD. The LCD does not wrap around to the first choice once you have reached the end of choices.

Remote Mode Indicator

If the local 3800 Series modem establishes a connection with the remote 3800 Series modem via the Remote branch, then choice indicator on both modems.

appears in place of the hidden

RIGHT

SCROLL

KEY

LEFT

SCROLL

KEY

LCD BOTTOM LINE

FUNCTION KEYS

Figure 4-4. 3800 Series LCD and Keypad

LCD Display

The LCD consists of a top line and bottom line, with each displaying a maximum of 16 characters at a time. If additional information appears on the LCD than what is currently displayed, a hidden choice indicator

>) appears in the upper right-hand corner of the

(< LCD. Use the direction to display more selections onto the LCD.

or key to scroll in the indicated

Keypad

The DCP on the Model 3810 and Model 3820 has seven keys while the optional SDCP of the COMSPHERE 3000 Series Carrier has eight keys. The additional key on the carrier is the to a specific slot in the carrier.

Key

The key returns you to the Top-Level menu

display from anywhere in the menu tree.

Pressing

while changing configuration options displays the message selected, changes made to configuration options are not saved and the T

op-Level menu appears. If Yes

then changes are saved to either Active (Saved), Customer 1, or Customer 2 configuration areas.

key

Select

Save Straps? Y

, used to connect the SDCP

es No

. If No

is selected,

4-6 November 1996 3810-A2-GB30-20

Page 34

Key

The key moves you up one level in the menu tree.

and

Use the

Keys

and

keys to move the viewing window left or right and to scroll the remaining branches and selections into view

. A maximum of

three selections can be displayed at one time. These keys also allow you to move the cursor one

character to the left or right on data entry displays; for example, to allow entry of one digit at a time.

F1, F2, F3 Keys Function keys select the LCD choice that appears

above the function key; they are labeled F1, F2, and F3. If a selection spans more than one function key, then any of those keys choose that selection.

Select

The

Key (Model 381

key appears on the optional SDCP of the

Select

COMSPHERE 3000 Series Carrier

1 only)

. It is used to connect the SDCP to a modem in a specific slot in the carrier.

Menu Structure

The menu tree is a hierarchical structure used to

display functions that configure and control local and remote 3800 Series modems. It is accessed via the DCP and is shown in Appendix A.

The menu tree contains the following branches:

Call Setup

Used to dial, disconnect, and



answer telephone calls as well as store up to 10 telephone numbers in directory locations. (See Chapter 5.)

DCP Operation

Talk/Data

Used to switch the modem



between Talk mode (the modem is disconnected from the VF line) and Data mode (the modem is connected to the VF line) when dialing via either the DCP or the attached telephone. (See Chapter 6.)

Status

Used to monitor the current



status of the VF line and DTE interface as well as view the identity of the modem. (See Chapter 7.)

Test

Used to begin and end various



modem tests. (See Chapter 8.)

Configure

Used to change and save the



modem’s configuration options. (See Chapter 9.)

Control

Used to control the modem’s



hardware and software functions. (See Chapter 10.)

Remote

Used to access and control a



remote 3800 Series modem. (See Chapter 11.)

Security

Used to control the modem’s



dial access security

. Appears only if the optional security feature is installed. (See Chapter 12.)

Menu tree branches are described in Chapters 5 through 12. Functions that appear on the LCD vary depending upon the type of model installed, its operating mode, and software configuration.

“Status”

Call_Setup Security

Tlk/Data Status Test Configure Control Remote

494-13083-0

4-73810-A2-GB30-20 November 1996

Page 35

COMSPHERE 3800 Series Modems

Top-Level Menu Status and Operational Messages

The LCD’ in Table 4-4, while the bottom line displays the main menu tree branches and operational and dial access

Access to all menu tree branches from the DCP begins

security messages, as listed in T

at the Top-Level menu, the head of the menu hierarchy.

Table 4-4

(1 of 3)

Top-Level Menu Status

Normal Operation

Status Message

Fax Rx: Fax Tx: Idle: Leased: OnLine:

Ring Indicate The local modem is receiving an incoming ring. Test:

MR* MR*

MR*

MR* MR* EC**

MR*

Indicates that the modem is online, in fax receive modem, operating at the displayed data rate. Indicates that the modem is online, in fax transmit mode, operating at the displayed data rate. The modem is configured for dial network operation and is on-hook. The modem is operating on leased lines at the displayed data rate. Indicates the modem is online, in Data mode, and operating at the displayed data rate. EC (error

control) displays if error control is operational.

The modem is in test mode operating at the displayed data rate.

s top line identifies the modem status, as listed

able 4-5 and Table 4-6.

Indicates

Alarm Status

Message***

Make Busy Indicates the modem is in a Make Busy condition. Power On Fail Indicates the modem has failed its Power-On Self-Test. Self Health Fail Indicates a failure in the modem’s hardware components. Weak Battery Indicates the battery is operating below 2 volts. Contact your sales or service representative.

Normal Call

Setup Messages

Off Hook The modem is off-hook and waiting to dial a telephone number. Dialing The remote modem is ringing. Training The modem is training or retraining. EC Negotiating The local and remote modems are negotiating the highest possible level of error control

compatible between both modems. Once a level is selected, this LCD message disappears.

*MR. Modem Rate indicates the data rate the modem is using. One of the following values appears: 300, 1200, 2400,

4800, 7200, 9600, 12K (12,000), 14.4 (14,400), 16.8 (16,800), or 19.2 (19,200) bps.

** EC. Error Control indicates the modem is online and using V.42 or MNP error control. One of the following values

appears after the modem rates listed above: MNP2, MNP3, MNP4, MNP5, V42, V42b, or NoEC. (NoEC indicates the modem is connected in Buffer mode rather than error control. If an EC value does not appear, then the modem is in Direct mode.)

***The Alarm Status Messages only appear when the Normal Operation Status Messages display; the LCD alternates

between the two message sets.

Indicates

4-8 November 1996 3810-A2-GB30-20

Page 36

Table 4-4

(2 of 3)

Top-Level Menu Status

DCP Operation

Call Failure

Messages

Busy

Signal Dial Line in Use The modem is already operating on dial networks when another call attempt has been issued. Invalid Number The modem has dialed a telephone number not stored in a directory location. No Answer Tone The answering modem has not answered within the time limit specified by the No Answer

No Dial – DTR The modem cannot dial because DTR is Off. No Dial – Test The modem cannot dial because it is running a Test. No Dial Tone The modem has aborted the call because it cannot detect a dial tone. No Quiet Answer The modem has detected No Quiet Answer (@) before the time-out setting of the No Answer

Trunk Busy The modem is receiving a fast (trunk) busy.

The answering modem is busy.

imeout configuration option.

Disconnect configuration option.

Call Disconnect

Messages

ATH Disconnect The modem has disconnected due to an ATH command. Bad Lines Disc The modem has disconnected because the lines do not support the modulation and/or data rate

selected.

Indicates

No Carrier Disc The modem disconnects due to the loss of carrier signal from the remote modem. DTR Disconnect The modem has disconnected due to the loss of DTR from the DTE. EC Disconnect The modem has disconnected due to failure to negotiate Error Control mode. Inv Rate Disc When using V.32bis modulation, the remote modem does not support the data rate used by the

local modem. LnCurrnt Disc The modem has disconnected due to the loss of line current. LongSpace Disc The modem has disconnected due to the detection of a long space. NoData Disc The modem has disconnected due to a lack of transmitted and received data. Disconnecting The modem has begun the disconnect sequence. Rmt Cmnded Disc The modem has disconnected due to a V.32 Cleardown received from the remote modem. Talk Mode The modem is in Talk mode.

4-93810-A2-GB30-20 November 1996

Page 37

COMSPHERE 3800 Series Modems

Table 4-4

(3 of 3)

Top-Level Menu Status

Dial Backup

Messages

Dial Standby The modem is operating in Dial Standby mode. DialBckUp:

Backup:

Stndby:

MR*

MR* EC**

The modem is operating in a Dial Backup mode at the displayed data rate and is configured for

Direct mode.

The modem is operating in Dial Backup mode and is configured for error control and data

compression on leased lines.

The modem is operating in Dial Standby mode and is configured for error control and data

compression on leased lines.

Indicates

Firmware

Download Result

Indicates

Messages

DownldOnly

Frmware Upgrade Indicates that a local download of firmware or a remote cloning of firmware was successful. RemClone Failed Displays on the local modem’s LCD and indicates that a remote cloning of firmware has failed. Remote Clone OK Displays on the local modem’s LCD and indicates that a remote cloning of firmware was

AT Command

Reset Message

Mode

Indicates that a local download of firmware or a remote cloning of firmware has failed. The

modem is currently in a Download Only mode in which only another download attempt is possible.

successful.

Indicates

Reset by AT command

* MR. Modem Rate indicates the data rate the modem is using. One of the following values appears: 300, 1200, 2400,

4800, 7200, 9600, 12K (12,000), 14.4 (14,400), 16.8 (16,800), or 19.2 (19,200) bps.

** EC. Error Control indicates the modem is online and using V.42 or MNP error control. One of the following values

The modem has performed a reset in response to an ATZ command.

4-10 November 1996 3810-A2-GB30-20

Page 38

Messages listed in Table 4-5 are common operational messages that occur during modem operation. These messages normally appear on the second line of the LCD.

Table 4-5

Common Operational Messages

Common

Operational

Indicates

Messages

Please Wait... Appears when a command to a local device takes more than two seconds to complete. Command Sent... Appears when a command is sent to a remote modem.

DCP Operation

No Rem Response or Remote Modem Fail

Command Complete Appears when a command, issued to a local or remote modem, is completed. Invalid Command Appears when the modem cannot complete a command.

Appears when a remote modem does not respond to a command within 5 seconds.

4-113810-A2-GB30-20 November 1996

Page 39

COMSPHERE 3800 Series Modems

Messages listed in T messages that can occur when the optional security feature is installed.

able 4-6 are dial access security

The Top-Level menu’

s main branches appear on the LCD in the order of Call Setup, Talk/Data, Status, Test, Configure, Control, Security

, and Remote. These branches

are described in the following chapters.

Table 4-6

Dial Access Security Messages

Dial Access

Security

Indicates

Messages

Get VF PsWd The answering modem is waiting for the originating caller to transmit a VF password. Get DTE PsWd The answering modem is waiting to receive a valid DTE password from the remote DTE. VF PsWd Timeout The modem did not finish answering a call (disconnected) because the allowed time limit was

exceeded before the modem received a VF password from the originating dialer.

Unknown DTEpswd The modem did not finish answering a call (disconnected) because the DTE passwords received

from the remote DTE were invalid.

No Orig PsWd The modem did not attempt to establish a call as requested because the AT dial command did not

contain an originate access password.

Unknown VF PsWd The modem did not finish answering a call (disconnected) because the modem received an

invalid VF password.

DTEpswd Timeout The modem did not finish answering a call (disconnected) because the allowed time limit was

exceeded before the modem received a DTE password from the remote DTE.

Inval Orig PsWd The modem did not attempt to establish the call as requested because the originate password in

the AT dial command was not valid.

DTR Dial Blocked Appears if DTR dialing is used and Answer Access or Originate Access security is enabled. DTR

dialing is not permitted when security is enabled.

SecurityBlocked Appears only when the modem is in base mode (a mode that occurs during a firmware download)

and Answer Access Security is enabled. In this case, the access verification capabilities are not available and the modem does not pass data to the DTE under any circumstances.

4-12 November 1996 3810-A2-GB30-20

Page 40

DCP Operation

Selecting Factory Configuration Options

After

the modem passes the power configure it for operation using one of the factory preset configurations.

The 3800 Series modems have several factory preset templates that contain the most commonly used configuration options (straps) for Asynchronous Dial, Synchronous Dial, Synchronous Leased (Answer or Originate), UNIX hardware network, cellular mobile, and cellular PSTN configurations. Y from the factory with the Async Dial default configuration options stored in memory. If Sync Dial, Sync Leased, UNIX Dial, or Cellular is more appropriate for your configuration, then you must change the factory setting using either the modem’ described in the following sections.

The preset configuration gives you a “head start” in getting your modem operating and reduces the amount of time required to configure your modem. For a better understanding of DCP operation and factory preset configuration options, refer to Chapter 9, Configure Branch.

s DCP or the A

Using the Diagnostic Control Panel (DCP)

The DCP’ 16-character lines which display modem status, control functions, and configuration options as well as indicating your location in the Top-Level menu tree (Appendix A).

s liquid crystal display (LCD) consists of two

-up self-test,

our modem is shipped

T command set as

Press the

4. preset appears on the LCD, and press the corresponding function key to select your choice.

5. Choose Function and Save functions.

6. Press the F3 key (Save) to save the new factory preset configuration to one of three configuration areas, Customer 2.

(These three configuration areas are nonvolatile memory locations. Active (Saved) contains the most recently saved changes to any configuration options. In the event of power loss, the modem retrieves these configuration options. Customer 1 and Customer 2 are user areas.)

The LCD now displays

Press the

7. configuration area appears on the LCD, then press the corresponding function key to select your choice. (Saving configuration options to the Active (Saved) configuration area automatically saves them to the Active (Operating) configuration area.) The LCD displays Command Complete.

8. The modem is now configured with the selected factory template. Press the

Top-Level menu.

key until the appropriate factory

appears and displays the Edit

Active (Saved), Customer 1, or

-defined configuration

Sav EditArea to.

key until the appropriate

key to return to the

To change the factory template using the DCP, perform

the following steps:

On the DCP press the comes into view

2. Press the function key below Configure to select the Configure branch.

The LCD now displays

Press the

3. then press the F1 key to display the factory preset configurations.

Factory preset configurations are

Sync Dial, (Mobile)

selected, you must choose either Originate mode.

key until Factory

Sync Leased, UNIX Dial

, and

Cellular (PSTN). If Sync Leased is

key until Configure

Ld EditAr

ea frm.

comes into view

Async Dial

, Cellular

Answer or

Refer to Chapter 9, Configur information regarding default factory configuration options.

e Branch,

for more

Using AT Commands

When

using A

be met:

• Make sure the asynchronous DTE’

software is configured for 10-bit character format (for example, 8 data bits, no parity, and 1 stop bit).

• Make sure the DTE (RS-232D) cable is attached to

the DTE connector on the rear of the Model 3810 or 3820 modem, or (for the Model 3811 modem) the rear of the COMSPHERE 3000 Series Carrier, and the correct serial communications port on the asynchronous DTE.

T commands, the following criteria must

s communication

4-133810-A2-GB30-20 November 1996

Page 41

COMSPHERE 3800 Series Modems

• On initial power-up, the modem is in Command

mode. To verify that the modem is connected and functioning properly, enter the following:

TYPE: AT PRESS: Return (Enter)

The screen displays

OK.

If the modem does not return OK, refer to Appendix C,

Troubleshooting.

NOTE

If you have already changed the factory preset configuration you may have lost AT command control. To regain AT command control, select, via the DCP, the Async Dial factory preset configuration as described earlier in

Control Panel (DCP)

Using the Diagnostic

To change a factory template using AT commands, perform the following steps (for more information on changing factory templates using AT commands, refer to Chapter 14, A

Use the A

T Command Set and S-Registers

T&F&W command to load the

appropriate factory configuration to the appropriate storage area. Enter the following:

(NOTE: &F1, &F2, and &F4 remove AT command control. The only way to return to AT command control is through the DCP as described earlier in

Using the Diagnostic Contr

ol Panel

(DCP).)

and

Where

n is one of the following storage areas:

0 for Active (Saved) 1 for Customer 1 2 for Customer 2

(NOTE: These three configuration areas are nonvolatile memory locations. Active (Saved) contains the most recently saved changes to any configuration options. In the event of power loss, the modem retrieves these configuration options. Customer 1 and Customer 2 are user

-defined

configuration areas.) PRESS: Return (Enter)

2. The selected factory configuration is saved.

The &V (V

iew) command can be used to display the configuration options in effect. The output of the &V command can be saved to a file and printed (using your communications software), providing both a record of your configuration and a worksheet for configuration enhancements. Refer to Chapter 14, AT Command Set and S-Registers, for more on AT commands.

TYPE: AT&Fy&Wn

Where

y is one of the following Factory configurations:

0 for Async Dial 1 for Sync Dial 2 for Sync Leased (Answer) 3 for UNIX Dial 4 for Sync Leased (Originate) 5 for Cellular (Mobile) 6 for Cellular (PSTN)

4-14 November 1996 3810-A2-GB30-20

Page 42

Diagnostic Control Panel Security Access

o access the Front Panel (DCP) Security Access

function, perform the following:

Press the

key three times.

DCP Operation

NOTE

This page of the manual is self-supporting and can be removed to prevent unwanted knowledge of the DCP security access selections.

Use

the DCP security access function to ‘

‘lock” the DCP of any 3800 Series modem and prevent unwanted user access. T

wo options are available for this function:

Grant and Deny.

Grant allows any branch of the Top-Level menu to be

accessed from the DCP

. Deny allows access only to the Status branch of the Top-Level menu. All 3800 Series modems are shipped from the factory with DCP access granted.

Press the Press the

key twice. key once.

Frnt

Panl Acces

Grant Deny

Select

Grant to allow access or select Deny to lock

DCP access.

Either selection results in a return to the Top-Level

menu.

4-153810-A2-GB30-20 November 1996

Page 43

Call Setup Branch

Overview 5-1ă. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Call Setup Branch 5-2ă. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dial 5-2ă. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Disconnect 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Answer 5-3ă. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dial Standby/Return to Dial 5-4ă. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Change Directory 5-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Entering Telephone Numbers and Dial Command Modifiers into Directory Locations 5-5. . . . . . . .

Overview

The Call Setup branch of the Top-Level menu allows you to dial, disconnect, and answer telephone calls. It also allows you to create and store up to 10 telephone numbers to directory locations. Six different functions can appear under Call Setup: Dial, Disconnect, Answer or Return to Dial (when applicable), and Change Directory.

Tlk/Data Status Test Configure Control Remote

Call_Setup

Dial

Disconnect

, Dial Standby

Answer

Dial_Standby

Return_to_Dial

Change_Directory

NOTE

The Dial Standby and Return to Dial functions only appear when the modem is in Dial Backup mode. If the Model 3820 is operating on leased lines, Change Directory is the only function available.

“Status”

Security

494-13084-0

Directory Locations 1 – 10

5-13810-A2-GB30-20 November 1996

Page 44

COMSPHERE 3800 Series Modems

Call Setup Branch

the following descriptions, the shaded key indicates

what key to press to perform the described operation.

To access the Call Setup branch from the Top-Level menu, select Call_Setup:

Idle: 19.2 > Call_Setup

Dial

Dial allows you to dial any telephone number stored in directory locations 1–10. Any telephone number dialed using the DCP must already exist in a directory location. Refer to Change Directory for information on storing telephone numbers in directory locations.

o access Dial from the Call Setup branch, make the

T following selection:

Select Dial to display the first directory telephone

number.

Dial Directory: Nxt 01:5551234

To view other directory locations, select Nxt.

Dial Directory: 01 Dialing

Once the directory location you want appears on the

LCD, press the F2 or F3 key to dial the number.

If the connection is successful, the modem is online and one of the Normal Operation status messages appears on the LCD. If the connection is not successful, the LCD displays one of the Call Failure status messages. (See Table 4-4 in Chapter 4.)

Call Setup: > Dial Disconnect

AT Command Equivalent

The AT command equivalent for Dial is DS=n, where n is directory location 1–10.

5-2 November 1996 3810-A2-GB30-20

Page 45

Call Setup Branch

Disconnect

Disconnect allows the modem to go on-hook (hang up). Use this function when you want to disconnect an established call on a dial line.

NOTE

When the Model 3820 is configured for leased-line operation, this function is not available and is not displayed on the LCD.

access Disconnect from the Call Setup branch,

make the following selection:

Call Setup: > Dial Disconnect

Select

Disconnect.

Answer

Answer allows the modem to go off-hook, generate an answer tone, and begin the handshaking process with the calling modem. Use the Answer function when the Auto-Answer Ring Count configuration option is disabled. (See the

When the Model 3820 is configured for leased-line operation, this function is not available and is not displayed on the LCD.

access Answer from the Call Setup branch, make

the following selections:

Line Dialer

NOTE

Call Setup: Answer

section in Chapter 9.)

Disconnect Command Complete

The modem goes on-hook (hangs up) and the call is disconnected. This includes any calls being used for dial backup of leased lines. The

Command Complete

status

message is displayed.

To exit this function and remain in the Call Setup branch, press the

Top-Level menu, press the

key

. To exit and return to the

key

AT Command Equivalent

The AT command equivalent for Disconnect is H or H0.

Press the

key until Answer is displayed. Select

Answer.

Answer Command Complete

The modem goes of

f-hook and attempts to establish a

connection in Answer mode. The Command Complete status message appears on the LCD.

To exit this function and remain in the Call Setup

branch, press the Top-Level menu, press the

key

. To exit and return to the

key

AT Command Equivalent

The AT command equivalent for Answer is A.

5-33810-A2-GB30-20 November 1996

Page 46

COMSPHERE 3800 Series Modems

Dial Standby/Return to Dial

The Dial Standby and Return to Dial functions appear on the LCD only after the Model 3810 or Model 3811, operating on leased lines, is placed into dial backup. Once the modem is operating in Dial Backup mode, these functions allow the modem to be switched back and forth between dial and leased-line operation while still maintaining the dial connection. See Figure 5-1. (Switching between dial and leased-line operation can be performed manually or automatically by enabling the Auto Dial Standby configuration option.)

For example, under normal dial backup conditions, when a problem occurs on the leased line, the modems establish a connection over the dial network using a telephone number stored in directory location 1.

Call Setup: Dial Standby

When this occurs, the Dial Standby function now appears on the LCD. By selecting this function, the modem switches back to the leased line while still maintaining the dial connection. As a result, the Return to Dial function now appears on the LCD instead of Dial Standby.

Call Setup: Return_to_Dial

the leased line is found to be unacceptable, select

Return_to_Dial which switches the modem back to dial network operation (LCD displays Dial Standby). If, however, the leased line is operating properly

, you can select Disconnect from the Call Setup branch and drop the dial-line call.

NOTE

When the Model 3820 is configured for leased-line operation, this function is not available and is not displayed on the LCD.

To access Dial Standby or Return to Dial from the Call

Setup branch, make the following selections:

Call Setup: Dial Standby

Press the key until Dial Standby or Return to Dial

is displayed. Select the appropriate function.

DIAL BACKUP LINE

DIAL

STANDBY

RETURN

TO DIAL

LEASED-LINE

FAILURE

Figure 5-1. Dial Backup

5-4 November 1996 3810-A2-GB30-20

MODEMMODEM

496-13081-01

Page 47

Call Setup Branch

Dial Standby Command Complete

the modem is operating in a Dial Backup mode, the

Dial Standby function forces the modem to leased lines and displays the status message

Command Complete.

Once the modem is in Dial Standby mode, the Return to Dial function appears on the LCD. Selecting this function forces the modem to dial networks and displays the status message

Command Complete.

AT Command Equivalent

There

is no A

T Command equivalent for Dial Standby

or Return to Dial.

Change Directory

Change Directory allows you to enter or modify telephone numbers. The modem has nonvolatile memory locations that allow you to store up to 10 telephone numbers. Each directory location can accept up to 40 characters; this includes the telephone number and dial command modifiers. Any telephone number dialed using the DCP Dial command must appear in a directory location.

Press the

Press any function key to select Change_Directory

key until Change_Directory is displayed.

01 : 5551234 ← Nxt "#

The phone number listed in directory location 1 is

displayed. Select Nxt to display other directory locations.

Entering Telephone Numbers and Dial Command Modifiers into Directory Locations

The following example uses an empty directory location for describing how to enter a telephone number. If you want to change an existing telephone number in any of the ten directory locations, follow the same procedures.

To add a telephone number to a directory location, make the following selections:

02 : z NxtąąąĄ"#

NOTE

If the modem is operating on leased lines and has a dial line attached for dial backup purposes, it is required that directory location 1 contain the telephone number used for dial backup.

access Change Directory from the Call Setup

branch, make the following selections:

Call Setup: > Change_Directory

Select Nxt until a blank directory appears on the LCD. (The cursor ( { ) always appears in the first character position.)

Select F2 (") or F3 (#) until the desired character is selected. This can be an alpha or numeric character.

02 : 9 z NxtąąąĄ"#

Press the key to move the cursor to the next character position.

Continue this key sequence until the dial command modifiers and telephone number are entered. (Refer to Table 5-1 for a list of valid dial command modifiers.)

5-53810-A2-GB30-20 November 1996

Page 48

COMSPHERE 3800 Series Modems

01 : 9W5556789 z NxtąąąĄ"#

AT Command Equivalent

The AT command for Change Directory is & Zn=x, where n is the directory location and x number.

is the telephone

Table 5-1 describes what can be entered in directory locations.

To save the number just entered, scroll to the next

key

directory location by selecting Nxt or press the " or #

The number is now stored in nonvolatile memory.

Table 5-1

Valid Dial Command Modifiers

Dial Command modifiers are parameters entered in the dial command string which specify how, when, and what number to dial. The following is a list of parameters the 3800 Series Modems recognize:

T – Tone (DTMF) dial. Any digit 0–9, *, #, A, B, C, or D can be dialed as tone.

–

Pulse dial. Only the digits 0–9 can be dialed in Pulse Dial mode.

P Once a dialing method (tone or pulse) has been specified, it will only remain active until the end of that dial

string. The modem defaults to the value set by the Dialer Type configuration option.

–

Pause. Causes the modem to pause before processing the next character in the dial string. The length of this pause

is determined by the setting of the Pause Time configuration option (see Line Dialer configuration option group) or by value held in S-register S8.

W or + – Wait for dial tone. Modem waits for a second dial tone before processing the dial string. This can be the initial

dial tone or can be used when dialing through a tandem PBX. For example, 9W 555-6789.

–

Reverse Dial mode. Causes the originating modem to send out an answertone once it no longer detects ringback.

(Ringback is the ring you hear at the originating site when making a call.) The R parameter must be the last character in the dial string.

@ – Quiet answer. Wait for five seconds of silence after dialing the number. If the silence is not detected, the modem

sends the NO ANSWER result code to the DTE or displays the No Quiet Answer LCD status message.

–

Hook flash. This causes the modem to go on-hook for 0.5 seconds then return to off-hook.

–

Return to Command mode. Modem returns to Command mode after dialing a number without disconnecting the call.

;

This permits you to enter long international telephone numbers, or additional information such as a calling card number, that would exceed the 40-character limit.

, –, and

Space

End of Number. Hides all characters appearing on the LCD entered to the right of this indicator.

( ). These characters are ignored by the dial string and can be included to enhance readability.

5-6 November 1996 3810-A2-GB30-20

Page 49

Talk/Data Branch

Overview 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Talk/Data Branch 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Manual Dialing when the Remote Modem Is Configured for Auto-Answer 6-2. . . . . . . . . . . . . . . . . . .

Manual Dialing when the Remote Modem Is Configured for Manual Answer 6-2. . . . . . . . . . . . . . . . .

Placing Modems into Talk Mode Once Modems Are Online 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview

The Talk/Data branch of the Top-Level menu allows you to switch the modem between T mode when manually dialing using either the DCP or attached telephone. On initial power-up, the modem is in Talk mode. When in T disconnected and you are free to use the telephone. When in Data mode, the modem is connected and data can be transmitted or received. This function is only available

for Model 3810 and Model 3820 modems.

alk mode, the modem is

Call_Setup Security

alk mode and Data

Status Test Configure Control Remote

Tlk/Data

Talk/Data Branch

The

following sections describe three uses of the

Talk/Data function.

“Status”

494-13085-0

6-13810-A2-GB30-20 November 1996

Page 50

COMSPHERE 3800 Series Modems

Manual Dialing when the Remote Modem Is Configured for Auto-Answer

If you are originating a call using a telephone and the remote modem is configured for Auto-Answer, perform the following procedure.

Idle : 19.2 Tlk/Data Status

Press the key until Tlk/Data is displayed.

Lift the attached handset and dial the telephone number of the remote modem. When the remote modem answers, it transmits an answer tone.

Idle : 19.2 Tlk/Data Status

If the handshake is successful, the modems are in Data

mode and OnLine

appears on the LCD.

NOTE

If the remote modem is not a 3800 Series modem, then the remote user must consult that modem’s operator’s manual to perform a similar operation.

Once

the modems are online, status messages listed in

Table 4-4 in Chapter 4 appear on the Top-Level display.

It is not necessary to specify an originating or answering modem when dialing via the DCP because the answering modem remembers that it received a ring voltage and will automatically default to Answer mode.

Placing Modems into Talk Mode Once Modems Are Online

If you want to communicate to a remote user via the telephone once a dial connection has been established, perform the following procedure.

When you hear this tone, immediately select Tlk/Data. This starts the handshaking sequence between your modem and the remote modem.

Online : 19.2 > Call_Setup

this is successful, the modems are in Data mode and

Online appears on the LCD.

Manual Dialing when the Remote Modem Is Configured for Manual Answer

If you are originating a call using a telephone and the remote modem is configured for Manual Answer, perform the following procedure.

Once the remote telephone is answered by the remote user

, you must both decide when to place the modems into Data mode. Y approximately the same time to begin the handshaking sequence.

ou must both select Tlk

/Data at

Via your asynchronous DTE, inform the remote user that you wish to talk and will be placing the modems into Talk mode. Both users should perform the following.

1. Lift the handset.

Press the

key until Tlk

/Data is displayed.

3. Select Tlk/Data. The telephones are now connected and you are

able to talk to the remote user. When you finish your conversation, and return to Data mode, both of you must select Tlk/Data.

Place the handset on to the cradle.

6-2 November 1996 3810-A2-GB30-20

Page 51

Overview 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Status Branch 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

VF 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Identity 7-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DTE 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RS366A 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Options 7-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Record 7-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview

The Status branch of the Top-Level menu allows you to view the current status of the dial or leased-line connection, the DTE interface, and the identity (for example, serial number and model number) of your equipment. There are up to six selections under Status: VF, Identity, DTE, RS366A, Options, and Record.

Status Branch

“Status”

Call_Setup Security

Tlk/Data Test Configure Control Remote

Status

VF Identity

SigQual RcvLev Sig/Noise NearEcho FarEcho FarEchDel EchoFreqOff

Ser# Mod # FRev HPt# FPt#

DTE

LSD DTR DSR Tst TXD RXD RTS CTS

RS366A Options Record

CRQ DLO DPR PND DSC ACR

494-13086-0

7-13810-A2-GB30-20 November 1996

Page 52

COMSPHERE 3800 Series Modems

Status Branch

access Status from the T

following selections:

Idle : 19.2 Tlk/Data Status

Press the

key until Status appears. Select Status.

VF displays the condition of the dial or leased-line connection.

o access VF from the Status branch, make the

T following selection:

Status: VF Identity

Select VF.

Status : VF > SigQual = Excelent

The modem’ bottom line. Press the receive signal level, signal-to-noise ratio, near end echo, far end echo delay, and echo frequency offset.

s signal quality is displayed on the LCD’

op-Level menu, make the

key to scroll and view the

SigQual

Signal Quality indicates the condition of the VF line. Possible values are

Excelent (Excellent), Good, Fair, Poor, or No Signal.

appear for V

These values only

.32bis and

V.32 modulations.

RevLev

Receive Signal Level indicates, in decibels referenced to one milliwatt (dBm), the actual strength of the incoming signal.

Sig/Noise

Signal-to-Noise Ratio indicates, in decibels, the receive signal strength relative to noise on the line.

NearEcho Near End Echo displays the

signal level, in decibels referenced to one milliwatt (dBm), of that portion of the transmit signal which has been echoed back by the local line termination. This value only appears for V

.32bis and

V.32 modulations.

FarEcho Far End Echo displays the

signal level, in decibels referenced to one milliwatt (dBm), of that portion of the transmit signal which has been echoed back by the remote line termination. This value only appears for V

.32bis and

V.32 modulations.

FarEchDel Far End Echo Delay indicates

the roundtrip delay in milliseconds of the far end echo.

EchoFreqOff Echo Frequency Of

fset indicates the frequency offset of the far end echo.

o exit VF and remain in the Status Branch, press the

key

. To exit and return to the Top-Level menu, press

key

the

AT Command Equivalent

There

is no A

7-2 November 1996 3810-A2-GB30-20

T command equivalent for VF status.

Page 53

Status Branch

Identity

Identity number, firmware revision level, hardware part number and firmware part number. Retrieval of this information is useful if you are purchasing additional or replacement modems and/or making firmware upgrades.

To access Identity from the Status branch, make the following selection:

Select Identity.

The modem’ bottom line. Press the model number, firmware revision level, hardware part number, and firmware part number.

displays the modem’

s serial number

, model

Status: VF Identity

Status : Identity > Ser # = 00000000

s serial number is displayed on the LCD’

key to scroll and view the

Ser #

Serial number is an 8-digit number that identifies the modem.

Mod #

Model number is an alphanumeric number that identifies the modem as either a Model 3810, Model 381

1, or

Model 3820 modem.

FRev Firmware revision level is an

alphanumeric number that identifies the level of firmware loaded in the modem.

HPt # Hardware part number is an

11-digit number that identifies the circuit card in the modem.

FPt # Firmware part number is an

11-digit number that identifies to service personnel the firmware release number.

To exit this function and remain in the Status branch,

press the menu, press the

key

. To exit and return to the Top-Level

key

AT Command Equivalent

The AT command I0 displays the product code,

normally 144.

The AT command I1 displays a firmware revision

number.

The AT command I2 performs an EPROM check and

displays

number.

circuit card.

number.

number (same as I1).

code displayed with the I0 command. See Chapter 14 for more information.

modem’ hexadecimal. (There is no DCP equivalent of this command.)

level.

OK or Error.

The AT command I3 displays the modem’

The AT command I4 displays the modem’

s serial

s model

The AT command I5 displays the part number of the

The AT command I6 displays the firmware release

The AT command I9 displays the firmware revision

The AT command I10 alters the value of the product

The AT command I11 performs a checksum of the

s firmware and displays the results in

The AT command I19 displays the firmware revision

7-33810-A2-GB30-20 November 1996

Page 54

COMSPHERE 3800 Series Modems

DTE

DTE displays the state and/or activity of the EIA-232-D interface leads: LSD, DTR, DSR, Tst, TXD, RXD, R leads status is updated every 5 seconds.

following selections:

TS, and CTS signals are monitored. The interface

To access DTE from the Status branch, make the

Status: Identity DTE

Press the key until DTE appears. Select DTE.

LSD DTR

DSR

Tst >

_*_

RS366A

RS366A displays the state and/or activity of the RS366A interface leads: CRQ, DLO, DPR, PND, DSC, and ACR. T synchronous dial out applications where V not supported. This function applies to Model 3811 modems only 5 seconds.

T following selections:

Press

ypically

, RS366A call originate is used in

.25bis dialing is

. The interface leads status is updated every

o access RS366A from the Status branch, make the

Status:

DTE

RS366A

the key until RS366A appears. Select RS366A.

CRQ

DLO DPR PND

* _ * * * _

The activity and state of the modem’s DTE signal

appear on the LCD’

s bottom line. Press the

scroll other signals into view

key to

The LCD’s bottom line displays a pair of symbols for each interface lead. The first symbol indicates the signal’s activity during the sampling interval. (An * (asterisk) indicates at least one transition while a blank space indicates no transitions since the last update.)

The second symbol indicates the state of the interface lead at the sampling time. (A block) indicates a Space or ON condition while an underscore (_) indicates a Mark or Off condition.)

To exit this function and remain in the Status branch, press the

menu, press the

key

. To exit and return to the Top-Level

key

AT Command Equivalent

There

is no A

T command for DTE status.

The activity and state of the modem’s DTE signal

appear on the LCD’

s bottom line. Press the

scroll other signals into view

key to

The second symbol indicates the state of the interface lead at the sampling time. (A block) indicates a Space or ON condition while an underscore (_) indicates a Mark or Off condition.)

To exit this function and remain in the Status branch, press the

menu, press the

key

. To exit and return to the Top-Level

key

AT Command Equivalent

There

is no A

T command for RS366A status.

7-4 November 1996 3810-A2-GB30-20

Page 55

Options

The

Options Status function displays all optional firmware features currently installed in the modem (for example, V firmware options are installed, None_Installed the LCD.

following sections:

.29, V.33, and dial network management). If no

appears on

o access Options from the Status branch, make the

o access Record from the Status branch, make the

following selections:

Status < Options Record

Status Branch

Status: RS366A Options

Press the

key until Options appears. Select

Options.

Options’ Status > V.29 V.33

If optional features are installed in the modem, they appear on the LCD’s bottom line. If other features are installed, press the

key to scroll other features into

view.

Record

Record is a troubleshooting tool used by the end user in conjunction with support personnel. This function allows the end user to retrieve and report any sequence faults to support personnel. A sequence fault is an irregular or unexpected event.

There are two selections under Record: Display and Clear

. Display allows up to eight sequence fault messages that have been recorded by the modem to be displayed on the LCD. If no sequence faults have occurred, then Modem O.K. appears.

Press the

key until Record appears. Select Record.

Record Status Display Clear

display sequence faults, select Display

Record Number 1 Modem O.K.

The LCD displays the first sequence fault field. (Sequence fault fields range from 1 to 8 and are identified by a number in the upper right corner.) Press the

key

to view the remaining fields. The message Modem O.K. appears if no sequence faults have occurred.

To remove sequence fault records from both the LCD and nonvolatile memory

, select Clear

. The message

Modem O.K. appears.

To exit this function and remain in the Status branch, press the

menu, press the

key

. To exit and return to the Top-Level

key

AT Command Equivalent

There

is no A

T command for Record.

Clear is used to remove all sequence fault messages

from nonvolatile memory and the LCD.

7-53810-A2-GB30-20 November 1996

Page 56

Test Branch

Overview 8-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Test Branch 8-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Abort 8-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Self 8-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Loc Analog Loop 8-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rem Digital Loop 8-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Loc Digital Loop 8-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Pattern 8-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview

The Test branch of the Top-Level menu allows you to initiate various modem tests. Use these tests if you are having data communication problems, such as periodic character loss, random errors, or constant format errors. By the process of elimination, you can usually isolate the fault in your system.

Call_Setup Security

Tlk/Data Status Configure Control Remote

Test

There are six selections under Test: Abort, Self (Self-Test), Loc Analog Loop (Local Analog Loopback), Rem Digital Loop (Remote Digital Loopback), Loc Digital Loop (Local Digital Loopback), and Pattern. The only tests that can operate concurrently are Pattern with a Local Analog Loopback and Pattern with a Remote Digital Loopback. If any test is operating, besides the two combinations just mentioned, it must be canceled before starting another test.

The T

est branch only initiates and cancels tests. If any parameters need to be set, refer to the Tests discussed in Chapter 9,

“Status”

Configur

e Branch

494-13087-0

section

Abort Self Loc_Analog_Loop Rem_Digital_Loop Loc_Digital_Loop Pattern

8-13810-A2-GB30-20 November 1996

Page 57

COMSPHERE 3800 Series Modems

Test Branch

access the T

make the following selections:

Press the key until T

Abort

Abort ends any test that is in progress and brings the

modem back to the normal mode of operation. Confirmation is provided by the Command Complete message.

est branch from the Top-Level menu,

Idle : 19.2 Status Test

est appears. Select T

Test : > Abort Self

est.

Self

Self performs an internal self-test of the modem, which takes less than a minute to complete. The modem must be offline (not connected with another modem), otherwise Invalid Command appears. This test is not valid in Remote mode and does not appear on the LCD of either modem when in Remote mode.

To access Self from the T following selection:

Test : > Abort Self

Select

Self. (All LCD cells and DCP status indicators

light.)

If the modem passes self-test, Pass appears on the LCD. If it fails, Failed appears. If the modem fails, contact your service representative.

If Invalid Command another test is in progress or the modem is operating on dial lines. Select Abort to clear the current test, or disconnect to clear the dial lines, and then choose Self.

est branch, make the

appears on the LCD, then

Select Abort.

Test : Abort Command Complete

The

modem stops all tests currently in progress and

displays the

Command Complete

status message on the LCD. To exit this function and remain in the T press the

menu, press the

key

. To exit and return to the Top-Level

key

AT Command Equivalent

The AT command is &T0.

est branch,

If the modem receives a ring signal during this test, the

test is cancelled and the

To exit this function and remain in the T

press the

key

menu, press the

RI Abort

message appears.

est branch,

. To exit and return to the Top-Level

key

AT Command Equivalent

The AT command is &T9.

8-2 November 1996 3810-A2-GB30-20

Page 58

Loc Analog Loop

Loc Analog Loop performs a local analog loopback (CCITT V.54 Loop 3), Figure 8-1, that verifies modem operation as well as the connection between the DTE and modem. The modem must be offline to perform this test, otherwise

make the following selections:

Invalid Command appears.

To access Loc Analog Loop from the T

est branch,

Test Branch

The

message

Started appears on the LCD, and the Test

LED (Model 3810 and Model 3811) lights for the duration of the test.

If the Test Timeout configuration option is enabled,

est T

imeout appears at the conclusion of the test. If it is

disabled, the test operates until aborted. For more information on the Test Timeout configuration option, refer to the Tests

section in Chapter 9.

A Ring Indicate during this test can cause errors.

Test : Loc_Analog_Loop

Press the key until Loc Analog Loop appears. Press any function key to start this test.

Test : Local Loop Started

To exit this function and remain in the T

press the menu, press the

key

. To exit and return to the Top-Level

key

est branch,

AT Command Equivalent

The AT command for Local Analog Loopback is &T1.

Figure 8-1. Local Analog Loopback

8-33810-A2-GB30-20 November 1996

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COMSPHERE 3800 Series Modems

Rem Digital Loop

Rem Digital Loop performs a remote digital loopback (CCITT V.54 Loop 2), Figure 8-2. This test can verify the integrity of the local modem, the communications link, and the remote modem. Any data or pattern entered at the local DTE is sent to and returned from the remote modem. For this test to operate properly online and in Synchronous or Asynchronous Direct mode.

To access Rem Digital Loop from the T make the following selections:

Test : Rem_Digital_Loop

Press the key until Rem_Digital_Loop appears. Press any function key to start this test.

, the modems must be

est branch,

Test : Remote Loop Started

The

message

Started appears on the LCD, and the Test

LED (Model 3810 and Model 3811) lights for the duration of the test.

If the Test Timeout configuration option is enabled,

est T

imeout appears at the conclusion of the test. If it is

disabled, the test operates until aborted. For more information on the Test Timeout configuration option, refer to the Tests

To exit this function and remain in the T

press the menu, press the

section in Chapter 9.

key

. To exit and return to the Top-Level

key

est branch,

AT Command Equivalent

The AT command for Remote Loopback is &T6.

Figure 8-2. Remote Digital Loopback

8-4 November 1996 3810-A2-GB30-20

Page 60

Loc Digital Loop

Loc

Digital Loop is issued by a local modem and forces it to loopback any data received from the remote modem (Figure 8-3). (This test operates the same as a CCITT V.54 Loop 2 except it is issued at your modem.) This is useful if a remote modem is incapable of initiating a remote digital loopback from its location. For this test to operate properly Synchronous or Asynchronous Direct mode.

To access Loc Digital Loop from the T

the following selections:

, the modems must be online and in

est branch, make

Test : Loc_Digital_Loop

Test Branch

The

message

Started appears on the LCD and the Test

LED (Model 3810 and Model 3811) lights.

If the message

Invalid Command

appears on the LCD, then another test is in progress. Select Abort to clear the current test and then select Loc Digital Loop.

If the Test Timeout configuration option is enabled, Test Timeout appears at the conclusion of the LCD. If it is disabled, the test operates until aborted. For more information on the Test Timeout configuration option, refer to the Tests

To exit this function and remain in the T press the

menu, press the

section in Chapter 9.

key

. To exit and return to the Top-Level

key

est branch,

Press the key until Loc_Digital_Loop appears.

Press any function key to start this test.

Test : Digitl Loop Started

AT Command Equivalent

The AT command for Local Digital Loopback is &T3.

Figure 8-3. Local Digital Loopback

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COMSPHERE 3800 Series Modems

Pattern

Pattern can transmit and receive a 511 bit error rate test pattern. It can also be used with a local analog loopback or a remote digital loopback to simulate data passing

Figure 8-4. Pattern Test and Local Analog Loopback Test

through the modem. For this test to operate properly, the modems must be online and in Synchronous or Asynchronous Direct mode. Otherwise, the message

Invalid:Bffr Mde

appears when this test is started. (See

Figures 8-4 through 8-6.)

Figure 8-5. Pattern Test and Remote Digital Loopback Test

8-6 November 1996 3810-A2-GB30-20

Page 62

Figure 8-6. End-to-End Pattern Test

Test Branch

To access Pattern from the T

est branch, make the

following selections:

Test : > Pattern

Press the key until Pattern appears. Select Pattern to start this test.

Test : Pattern > Blks Errd = xxxxxxx

BlksErrd=xxxxxxx displays the number of blocks of data found in error (block size is 1000 bits per block). The message the modem’

NoSync can appear as a value for BlksErrd while

s receiver is synchronizing. The message

OvrFlw can appear as the value for BlksErrd if the counter overflows.

The Pattern test can be exited and reentered without restarting the test. The BlksErrd and BlksRcvd continue counting.

If the Test Timeout configuration option is enabled,

est T

imeout appears at the conclusion of the test. If it is

disabled, the test operates until aborted. For more information on the Test Timeout configuration option, refer to the Tests section of Chapter 9.

To exit this function and remain in the T press the

menu, press the

key

. To exit and return to the Top-Level

key

est branch,

AT Command Equivalent

The AT command for Pattern is &T2.

Press the

key to display

BlksRcvd=xxxxxxx,

number of blocks of data received.

8-73810-A2-GB30-20 November 1996

Page 63

Configure Branch

Overview 9-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configure Branch 9-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Editing and Saving a Configuration Option 9-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Summary 9-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuration Tables 9-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DTE Interface 9-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DTE Dialer 9-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Line Dialer 9-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dial Line 9-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Leased Line 9-29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

V.42/MNP/Buffer 9-34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tests 9-40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Misc 9-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Security Configuration Options 9-46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview

After installing a 3800 Series modem, its software configuration options must be set using either the Diagnostic Control Panel (DCP) or the AT command set. This chapter describes how to access and use the Configure branch of the Top-Level menu via the DCP.

The Configure branch accesses the Edit Area which is a work space where you view and change any configuration options (straps). These configuration options are loaded to the Edit Area from one of five configuration option areas: Active (Operating), Active (Saved), Customer 1, Customer 2, or Factory.

• Active (Operating) is a configuration area

containing configuration options currently used by the modem. When the modem is powered on or when a save is performed, the contents of Active (Saved) are loaded into Active (Operating). Any changes made using A this configuration area.

• Active (Saved) is a read from and write to

configuration option area containing the most recently saved changes made to any configuration options. In the event of power loss or reset, the modem retrieves these settings from nonvolatile memory.

T commands directly affect

and

• Customer 1

read and write (changeable) configuration areas where you can create and store additional configurations for specific applications.

• Factory is a read-only (unchangeable)

configuration area containing six sets of predefined configuration options labeled Dial, Sync Leased (Answer/Originate), UNIX Dial, Cellular (Mobile) These sets contain the most commonly used configuration options for modems installed in these hardware environments, and give you a head start in configuring your modem. Factory default settings are listed in Appendix G.

If you are using AT commands, a period of time can exist in which the contents of Active (Operating) and Active (Saved) differ. Once you issue an AT&W0 (write) command, however, the two storage areas are identical.

Customer 2 are two additional

NOTE

Async Dial

, and

Cellular (PSTN).

, Sync

9-13810-A2-GB30-20 November 1996

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COMSPHERE 3800 Series Modems

Figures 9-1 and 9-2 graphically display the interaction between the edit area and configuration areas as viewed from the perspective of the DCP and the AT command set.

CONTENTS OF Active (Saved) ARE AUTOMATICALLY COPIED TO Active (Operating) WHEN A SAVE IS COMMANDED VIA THE DCP, ON A RESET, OR ON POWER-UP

Active (Operating) Active (Saved) Customer 1 Customer 2 Factory

Load Edit

Area From

• Async Dial

• Sync Dial

• Sync Leased (Answer/Originate)

• UNIX Dial

• Cellular (Mobile)

• Cellular (PSTN)

EDIT AREA

ALLOWS YOU TO VIEW AND EDIT CONFIGURATION OPTIONS

Save

ANY CHANGES MADE TO CONFIGURATION OPTIONS ARE SAVED TO Active (Saved), Customer 1, OR Customer 2

Figure 9-1. DCP Configuration Process

494-13079-02

9-2 November 1996 3810-A2-GB30-20

Page 65

Configure Branch

Active (Saved)

(ATZ0, ATZ3)

NOTE

ON POWER-UP, Active (Saved) IS LOADED TO Active (Operating)

Active (Operating)

CHANGES MADE USING ANY AT COMMAND IMMEDIATELY AFFECT MODEM OPERATION

USE AT&W COMMAND TO SAVE CHANGES TO Active (Saved), Customer 1, OR Customer 2

Customer 1

(ATZ1)

LOAD Active (Operating)

USING ATZ OR AT&F

COMMAND

Customer 2

(ATZ2)

Factory

• Async Dial (AT&F0)

• Sync Dial (AT&F1)

• Sync Leased Answer (AT&F2)

• UNIX Dial (AT&F3)

• Sync Leased Originate (AT&F4)

• Cellular (Mobile) (AT&F5)

• Cellular (PSTN) (AT&F6)

THE AT&W COMMAND IS DISABLED IF THE Straps When Disconnect CONFIGURATION OPTION IS SET TO RELOAD

Active (Saved)

(AT&W0)

Customer 1

(AT&W1)

Customer 2

(AT&W2)

Figure 9-2. AT Command Configuration Process

NOTE

494-13080-02

9-33810-A2-GB30-20 November 1996

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COMSPHERE 3800 Series Modems

r )

Configure Branch

The Configure branch of the Top-Level menu contains all of the modem’s configuration options (straps) which determine how the modem operates. These configuration options are accessed by scrolling down and across various levels of the Configure branch.

“Status”

Call_Setup Security

Tlk/Data Status Test Control Remote

Configure

Ld EditArea frm:

Activ (Operating)

Active (Saved)

Customer1 Customer2 Factory

Async_Dial

Choose Function

Edit Save

Active (Saved) Customer1 Customer2

Sync_Dial

Sync_Leased

UNIX_Dial

Choose Mode

Answer Originate

Cellular (Mobile)

Cellula (PSTN

DTE_Interface

DTE_Dialer

Line_Dialer

Dial_Line

Leased_Line

V42/MNP/Buffer

Tests

Misc

Security

494-13088-02

9-4 November 1996 3810-A2-GB30-20

Page 67

Configure Branch

The Configure branch consists of the following three levels:

Ld EditAr

•

ea frm.

Allows the selection of the Active (Operating), Active (Saved), Customer 1, Customer 2, and Factory configuration areas.

• Choose Function.

Allows you to make changes (Edit) to existing configuration options or write (Save) these changes to either the Active (Saved), Customer 1, or Customer 2 configuration area.

• Edit Strap Group.

Contains the eight software configuration option groups that determine how the modem operates.

Editing and Saving a Configuration Option

The

following example shows how to change the Remote Access Password using the DCP intend to access another 3800 Series modem via the Remote branch of the Top-Level menu, the Remote Access Password must be the same for both modems.) By following these procedures you learn how to load a factory preset configuration area (in this case, Async Dial), how to edit a configuration option (Remote Access Password), and how to save changes to a configuration area (Active (Saved)). The shaded key indicates what key to press.

. (If you ever

Select the Factory configuration area.

Ld Fact Preset : > Async_Dial

Select

Async_Dial.

Choose Function Edit Save

Select Edit.

Edit StrapGroup > DTE_Interface

Idle : 19.2 Test Configure

Select Configure from the Top-Level menu.

LdEdit Areafrm > Activ (Operating)

LdEdit Areafrm < Activ (Operating)

Edit StrapGroup < Tests Misc

across the LCD and select the Misc

Scroll

configuration options group.

StrapsWhenDisc > Nxt No_Change

RemAccssPasswrd NxtąĄ°0

0000000

9-53810-A2-GB30-20 November 1996

Page 68

COMSPHERE 3800 Series Modems

Select

Nxt until RemAccssPasswrd appears.

RemAccssPasswrd NxtąĄ°0

0000000

Sav EditArea to > Active (Saved)

Select the F2 (°

) key to increment password values.

RemAccssPasswrd

0000000

Press the

NxtąĄ°0

key to move the cursor to the next

position.

RemAccssPasswrd NxtąĄ°12345678

Continue this sequence until you have entered the new

password value.

o save the new password to a configuration area,

make the following selections.

Select a configuration area (Active (Saved),

Customer 1, or Customer 2) to save the changes.

Select the key to exit to the Top-Level menu or

select the

key to remain in the Configure branch.

Summary

When using the DCP to edit configuration options,

keep the following in mind:

• Nxt has two functions. First, it indicates that more

configuration options are available within that group. These are accessed by selecting Nxt (pressing F1) and scrolling down to the next configuration option. Second, it indicates that what is displayed on the LCD is the current setting. If you scroll left or right, Nxt disappears and reappears if a new value is selected.

• End

• The

appears when you have scrolled down to the last configuration option available in that group. Selecting End returns you to the top of the configuration group. You are free to enter that group again or scroll left or right to the next configuration options group.

key takes you one step up in the Configure

branch each time it is pressed.

RemAccssPasswrd NxtąĄ°12345678

• The

branch and return to the Top-Level menu. If any

key causes you to exit the Configure

changes are made to configuration options, the DCP

allows you to save these changes to either the Active (Saved), Customer 1, or Customer 2 configuration areas.

Press the

key to scroll up (twice).

• The

and

keys move selections across the

LCD.

Choose Function Edit Save

Select

Save.

9-6 November 1996 3810-A2-GB30-20

• The function keys (F1, F2, F3) select the LCD

choice that appears above that function key

Page 69

Configure Branch

Configuration Tables

The modem’s configuration options are arranged into eight groups based upon functionality: DTE Interface (Table 9-1), DTE Dialer (Table 9-2), Line Dialer (Table 9-3), Dial Line (Table 9-4), Leased Line (Table 9-5), V.42/MNP/Buffer (Table 9-6),

ests (T

appear on the LCD: Enable and Disable. Unless otherwise stated, Enable selects a configuration option and makes it available for use; Disable makes a configuration option unavailable for use.

configuration options group in detail, listing factory defaults, definitions, and AT command equivalents.

able 9-7), and Misc (Table 9-8).

Throughout these tables, two selections frequently

The remainder of this chapter discusses each

DTE Interface

The DTE Interface configuration options contain EIA-232-D (CCITT V.24) and asynchronous character format information essential for maintaining a connection and for transmitting data between the DTE and the modem.

Table 9-1 shows each DTE Interface configuration option as it appears on the LCD, with the Async Dial factory default setting (the default value if the modem is just being installed) shown following the colon (:) on the first line and with all available selections listed on the second line. Following this is a description of the configuration option, a description of the available selections, and any equivalent A

T commands.

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COMSPHERE 3800 Series Modems

Table 9-1

(1 of 7)

DTE Interface Configuration Options

Async/Sync Mode: Async Nxt Async Sync

Asynchronous/Synchronous Mode. Determines whether the modem operates in Asynchronous mode or Synchronous mode. If the AT command set is enabled and this configuration option is set for Sync, then the modem operates in Async mode when offline.

For Async Dial and UNIX Dial, Async is the factory default. For Sync Dial and Sync Leased, Sync is the factory default. AT commands for Async Mode are &M0, &M231, &M232, &M235, or &Q0. AT commands for Sync Mode are &M1, &M2, &M3, &M233, &M234, &M236 or &Q1, &Q2, &Q3.

*Async DTE Rate: 19200

Nxt 19200 57600 38400 14400 12000 9600 7200 4800 2400 1200 0–300 76800 1

Asynchronous DTE Data Rate. Identifies the asynchronous DTE’s operating rate to the modem. Data rates from 115,200 bps to 300 bps are supported.

To originate calls in 76,800 bps Sun Workstationr environments, use either DCP dialing, DTR dialing, or handset dialing. The modem does not support AT command dialing at this data rate.

To prevent losing data in 115,200 bps applications, a 16650 UART on the PC’s serial port is required, as well as a communications package which can take advantage of its 16-byte buffer. In addition, a 386 25-MHz (or faster) PC is required, and the RS-232 cable must be 6 feet or less to minimize capacitance.

NOTE: This configuration option is ignored in Async Direct mode and synchronous mode since the DTE rate always

equals the VF rate.

The factory default is 19200 bps. AT prefix determines Async DTE Rate.

15200

#Data Bits: 8 Nxt 8 7 9(DirectMde) 6(DirectMde)

Number of Data Bits. Determines if the data length is composed of 6, 7, 8, or 9 data bits. This data length excludes start, parity, and stop bits.

8 – Sets data length to 8 data bits. This is the default for Async mode. 7

– Sets data length to 7 data bits. This is the default for Sync mode.

9(DirectMode) – Sets data length to 9 data bits. Only valid when Error Control configuration option is set to Direct Mode. 6(DirectMode) – Sets data length to 6 data bits. Only valid when Error Control configuration option is set to Direct Mode.

The factory default is 8 data bits. NOTE: If the DTE Dialer Type configuration option is set for AT or V.25bis Async, then the total character size must

equal 10 bits (see DTE Dialer configuration options group). Total character size consists of a start bit, number of data bits, parity bits, and stop bits. V.25bis Async must use 7 data bits with even parity and 1 stop bit. The total character size for Error Control mode or Buffer mode must be 10 bits or less. The total character size for Direct mode must be 11 bits or less.

AT prefix determines the async character length.

* This configuration option only appears if Async/Sync Mode is configured for Async.

9-8 November 1996 3810-A2-GB30-20

Page 71

Configure Branch

Table 9-1

(2 of 7)

DTE Interface Configuration Options

Parity Bit: None Nxt None Even Odd Mark Space

Parity Bit. Determines type of parity bit. The parity of the DTE must match the parity of the modem. Parity options include None, Even, Odd, Mark, or Space.

None – No parity bit is used. This is the default for Async mode. Even – Parity bit is set so that total number of 1’s in data bits plus parity bit is even. Odd – Parity bit is set so that total number of 1’s in data bits plus parity bit is odd. This is the default for Sync mode. Mark – Parity bit is always set to 1. Only valid if #Data Bits configuration option is set to 7. Space – Parity bit is always set to 0. Only valid if #Data Bits configuration option is set to 7.

The factory default is None. NOTE: If the DTE Dialer Type configuration option is set for AT or V.25bis Async, then the total character size must

AT prefix determines parity of the character.

#Stop Bits: 1 Nxt 1 2

Number of Stop Bits. Selects 1 or 2 bits to signal the end of a character. The factory default is 1. NOTE: If the DTE Dialer Type configuration option is set for AT or V.25bis Async, then the total character size must

AT prefix determines the number of stop bits via autobauding.

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COMSPHERE 3800 Series Modems

Table 9-1

(3 of 7)

DTE Interface Configuration Options

DTR Action: Ignore Nxt Stndrd_RS232 Ignore CntrlsOnHook Off=ReloadStrp Off=CmdMode CntrlsTXMute

Data Terminal Ready Action. DTR is a signal from the DTE to the modem indicating that the DTE is connected and ready for operation.

Standard RS232 – Allows the DTE to control DTR to the modem as specified in EIA-232-D and CCITT V.24 specifications. If this signal is not present, the modem will not answer or dial. In leased line mode, using direct mode, DTR must be on for the modem to transmit or receive data.

Ignore – Modem assumes DTR is always ON. This is used when DTE does not provide DTR to the modem. CntrlsOnHook – Modem does not disconnect from the VF line during an active call until DTR is lowered by the attached

DTE. This setting is required for applications in which the host processor must reset itself for the next session before the current session is terminated. The setting is ignored if the modem receives a disconnect command from the DCP or from the COMSPHERE 6700 Network Management System.

Off=ReloadStrp – Like Standard RS232, except that when DTR is lowered the modem loads the Active (Saved) area into the Active (Operating) area.

Off=CmdMode – When the modem is online and DTR is Off for longer than the period specified by the S25 register modem enters online Command mode. The ATO command must be issued to return to data mode. This setting has the same effect as Ignore if AT commands are disabled.

CntrlsTXMute – Like Standard RS232, except that when DTR is lowered at the answering modem, the modem mutes transmitter output.

NOTE: If V.25bis mode is used, then this configuration option must be set for Stndrd_RS232. The DTE must provide

DTR to dial or answer a call.

When operating over the dial network, this selection forces DTR Action to behave as CT108/2 (Data Terminal Ready). If DTE Dialer Type configuration option is set to DTR=Direct 1, then DTR Action behaves as CT108/1 (Connect Data Set to Line).

For Async Dial, Sync Leased, and UNIX Dial, Ignore is the factory default. For Sync Dial, Stndrd_RS232 is the factory default.

AT command for Ignore is &D0. AT command for Off=CmdMode is &D1. AT command for Standard RS232 is &D2. AT command for Off=ReloadStrp is &D3. AT command for CtrlsOnHook is &D4. AT command for CntrlsTXMute is &D5.

, the

DSR Control: Forced_On Nxt Forced_On Stndrd_RS232 WinkWhenDisc Follows_DTR On_Early Delay_To_Data DialBkToggle

Data Data Set Ready Control. DSR is a signal from the modem to the DTE indicating the modem is connected and ready for operation.

Forced On – Forces DSR output ON constantly. This is usually used for leased-line applications and when the DTE requires DSR to always be ON.

Standard RS232 – Allows the modem to control DSR to the DTE. The modem raises DSR when it begins the handshake process. DSR lowers upon disconnect. The modem may not be ready to receive data until DSR, CTS, and LSD are active.

An ON state indicates to the DTE that the modem is ready to receive data. An Off state indicates that the modem is not ready to receive data, and the DTE will not send data to the modem. During a Local Analog Loop and a Remote Digital Loop, DSR is ON.

Wink When Disconnect – DSR is normally forced ON, but is turned Off for 1 to 2 seconds upon a disconnect. Follows DTR – When the modem receives DTR from the DTE, it sends DSR to the DTE. On Early – DSR is low when the modem is in the idle state. DSR goes high immediately upon a command to enter Data

mode. This setting is required for some modem pooling applications.

9-10 November 1996 3810-A2-GB30-20

Page 73

Configure Branch

Table 9-1

(4 of 7)

DTE Interface Configuration Options

DSR Control (cont’d) Delay to Data – Operation is similar to the Standard RS232 setting except that DSR does not turn ON until the modem

enters Data mode. Normally, the modem raises DSR when it begins the handshaking process. Use this setting when the DTE cannot operate with a long DSR-to-CTS delay (common for V.32bis modulation) or when

dial access security is enabled and requires a DTE-side password entry. Often, the DTE cannot accept the long delay between DSR and CTS turning ON due to the remote user entering the DTE-side password.

Dial Backup Toggle – DSR is turned off during a dial backup attempt in Leased mode, and on when such an attempt completes. DSR is also turned off when a disconnect begins, and turned on when the disconnect is complete.

For Async Dial and UNIX Dial, Forced_On is the factory default. For Sync Dial and Sync Leased, Stndrd_RS232 is the factory default.

AT command for Forced On is &S0. AT command for Standard RS232 is &S1. AT command for Wink When Disconnect is &S2. AT command for Follows DTR is &S3. AT command for On Early is &S4. AT command for Delay to Data is &S5. AT command for Dial Backup Toggle is &S6.

RTS Action: Ignore Nxt Ignore Stndrd_RS232 Sim_Cntl_Car

Request-to-Send Action. RTS is a signal from the DTE to the modem indicating the DTE has data to send to the modem.

Ignore – Modem assumes RTS is always ON. Use this selection when the DTE does not provide RTS to the modem. Standard RS232 – Allows the DTE to control RTS to the modem in normal EIA-232-D operation. In direct mode, RTS

must be ON for the DTE to transmit to the modem. Simulated Control Carrier – RTS input controls the remote modem’s LSD signal. This is used for DTEs that require

Line Signal Detect (LSD) to toggle ON and Off to simulate half-duplex operation. NOTE: If RTS Action is set for simulated control carrier

must be set for Simulated Control Carrier. Simulated Control Carrier conforms to V.13 specifications. This setting is ignored when the modem is configured for Asynchronous mode and RTS/CTS flow control is selected.

For Async Dial and UNIX Dial, Ignore is the factory default. For Sync Dial and Sync Leased, Stndrd_RS232 is the factory default.

AT command for Standard RS232 is &R0. AT command for Ignore is &R1. AT command for Simulated Control Carrier is &R2.

, then the remote modem’

s LSD Control configuration option

9-113810-A2-GB30-20 November 1996

Page 74

COMSPHERE 3800 Series Modems

Table 9-1

(5 of 7)

DTE Interface Configuration Options

CTS Control: Forced_On Nxt Forced_On Stndrd_RS232 WinkWhenDisc Follows_DTR

Clear-to-Send Control. CTS is a signal from the modem to the DTE indicating that it can accept data from the DTE.

NOTE: When CTS flow control or CTS/RTS flow control is enabled, CTS will turn ON and Off regardless of the setting

Forced On – CTS is forced ON at all times. Use this selection for most asynchronous applications. Standard RS232 – In Synchronous mode, forces the state of CTS to follow the state of RTS in normal EIA-232-D

operation. The minimum time that elapses between CTS and RTS is determined by the RTS/CTS Delay configuration option. Use this setting for most synchronous applications.

In AT Command mode, CTS goes low just prior to DSR going active and goes high when the modem enters Data mode. This operation prevents losing data in applications which begin transmitting as soon as DSR and CTS are both active.

Wink When Disconnect – CTS is normally forced ON, but is turned Off for 1 to 2 seconds upon a disconnect. Use this for most UNIX applications.

Follows DTR – The state of CTS follows the state of DTR. When DTR turns ON, CTS turns ON. When DTR turns Off, CTS turns Off.

For Async Dial, Forced On is the factory default. For Sync Dial and Sync Leased, Stndrd_RS232 is the factory default. For UNIX Dial, WinkWhenDisc is the factory default.

AT command for Forced On is \D0. AT command for Standard RS232 is \D1. AT command for Wink When Disconnect is \D2. AT command for Follows DTR is \D3.

of CTS Control.

RTS/CTS Delay: 0 msec Nxt 0msec 10msec 50msec 150msec 600msec

Request-to-Send/Clear-to-Send Delay. RTS/CTS Delay sets the delay time between the modem receiving RTS from the DTE and the modem sending CTS to the DTE.

This delay is only valid in Async Direct mode and synchronous applications when it is necessary to have a short delay between the time the DTE raises RTS and the time the modem presents CTS to allow the DTE to send data.

NOTE: For this configuration option to be valid, both the RTS Action and the CTS Control configuration options must be

set for Stndrd RS232. If RTS Action is set for Ignore, RTS is always ON and this configuration option has no effect.

The factory default is 0 milliseconds.

AT command is S-register S26 =

where n is a value from 0 to 255 in 10 millisecond increments.

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Page 75

Configure Branch

Table 9-1

(6 of 7)

DTE Interface Configuration Options

LSD Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Sim_Cntrl_Car =DTR/DiscOff BridgeRetrain

Line Signal Detect Control. LSD is a signal indicating that the carrier signal is being received from the remote modem. It is normally turned Off to the DTE when the power level of the received carrier signal drops below the carrier detect threshold.

Standard RS232 – LSD is ON when the modem detects the remote modem’s carrier signal. LSD turns Off when the carrier signal strength drops below carrier detect threshold.

Forced On – Forces LSD to be ON at all times. Wink When Disconnect – LSD is normally forced ON, but can be turned Off for 1 to 2 seconds upon a disconnect. This

is used for UNIX DTEs. Follows DTR – The state of LSD follows the state of DTR. When DTR turns ON, LSD turns ON. When DTR turns Off,

LSD turns Off. Simulated Control Carrier – LSD follows the state of RTS of the remote DTE via the V.13 simulated control carrier

signaling. This is required for hosts that cannot support full-duplex operation.

NOTE: If LSD Control is set for simulated control carrier, then the RTS Action configuration option on the remote

=DTR/Disconnect Off – The state of LSD follows the state of DTR except when disconnecting once a connection is

established. In this instance, DTR remains ON and LSD turns Off. DTR must then toggle Off and then ON again for LSD to turn ON. This setting is required for AT&T DATAKITr dial-out applications.

BridgeRetrain – LSD behaves as if it were set for Standard RS232, except that it is turned off when a retrain condition lasts longer than10 seconds, and turned on again when no retrain condition is detected for a period of 10 seconds.

NOTE:

For Async Dial, Sync Dial, and Sync Leased, Stndrd_RS232 is the factory default. For UNIX Dial, WinkWhenDisc is the factory default. AT command for Forced On is &C0.

AT command for Standard RS232 is &C1. AT command for Wink When Disconnect is &C2. AT command for Follows DTR is &C3. AT command for Simulated Control Carrier is &C4. AT command for =DTR/Disconnect Off is &C5. AT command for BridgeRetrain is &C6.

modem must be set for Simulated Control Carrier.

If LSD Control is set for =DTR/DiscOff, then the DTR Action configuration option must be set for Stndrd_RS232.

TX Clock Source: Internal Nxt Internal External RXC_Loop

Transmit Clock Source. Determines the source of timing for synchronous data transmitted from the DTE. Internal – The transmit data’s clock source is derived from the modem’s internal clock and output on Pin 15 (TXC) of the

EIA-232-D interface.

External – The transmit data’s clock source is provided by the DTE on Pin 24 (EXT) on the EIA-232-D interface. Receive Clock Loop

the EIA-232-D interface. NOTE: This configuration option only appears if Async/Sync Mode is configured for Sync. The factory default is Internal.

AT command for Internal is &X0. AT command for External is &X1. AT command for RXC Loop is &X2.

– The modem’

s transmit clock is derived from its received signal and is output on Pin 15 (TXC) of

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Page 76

COMSPHERE 3800 Series Modems

Table 9-1

(7 of 7)

DTE Interface Configuration Options

CT111_Rate Cntl: Disable Nxt Disable Fallback1 Fallback2

CT111 Rate Control. Allows the DTE to control modem rate via Pin 23 of the EIA-232-D interface. This option determines the ef

fect of the DTE Rate control signal. CT111 is also known as CH on the EIA-232-D interface.

Disable – Disregards CT111 Rate Control. Fallback1 – Forces the modem to decrease its configured data rate to the next lower data rate when CT111 is Off. Valid

only for V.32bis modulation. Modem will only fall back within the same modulation scheme. When CT111 turns ON, the modem returns to its previous data rate.

Fallback2 – Forces the modem to decrease two data rates while remaining in the same modulation scheme. When CT111 turns ON, the modem returns to its previous data rate.

NOTE: This configuration option is only valid in Async Direct mode and Synchronous mode. For proper operation,

disable the V32bis Autorate and V32bis Automode configuration options.

The factory default is Disable.

AT command is S-register S61 =

, where n is 0 for Disable, 1 for Fallback1, and 2 for Fallback2.

DTE Rate=VF: Disable End Disable Enable

DTE Rate = VF Rate. Forces the data rate of the connection between the DTE (computer) and the modem to be the same as the VF (telephone line) rate.

Disable – The DTE rate is the value of the Async DTE Rate configuration option. Enable – The DTE rate is identical with the VF rate.

The factory default is Disable.

AT command is S-register S90 =

, where n is 0 for Disable, and 1 for Enable.

9-14 November 1996 3810-A2-GB30-20

Page 77

Configure Branch

DTE Dialer

Table 9-2 shows each DTE Dialer configuration option

as it appears on the LCD, with the Async Dial factory

The DTE Dialer configuration options establish the DTE-to-modem protocol for call establishment and control.

default setting (the default value if the modem is just being installed) shown following the colon (:) on the first line and with all available selections listed on the second line. Following this is a description of the configuration option, a description of the available selections, and any equivalent A

T commands.

Table 9-2

(1 of 5)

DTE Dialer Configuration Options

DTE Dialer Type: AT Nxt AT Disable V25bis_Async V25bis_Bsync V25bis_HDLC DTR=Dirs RS366A AT&T_Exclusv

Data Terminal Equipment Dialer Type. Identifies to the modem the type of dialing method and protocol used by the DTE. AT – Allows AT command protocol to be used as a method for entering commands and dialing when used in an

asynchronous application. This is the only valid setting for leased-line applications.

NOTE: The modem will not respond to AT commands if DTE Dialer Type is not set for AT. Disable – Disables any type of DTE dialing method. Dialing can only be performed using the DCP’s Dial command or

attached telephone. V.25bis Async – Selects V.25bis Async as the dialing method and protocol used by the modem. The character length

must be 7 data bits with even parity and 1 stop bit. V.25bis Bisync – Selects V.25bis Bisync as the dialing method and protocol used by the modem. This is also known as

character-oriented protocol. This framing protocol uses two synchronous control characters and a start-of-text control character before the text block and an end-of-text control character after the text block. The character length must be 7 data bits with odd parity and 1 stop bit.

V.25bis HDLC – Selects V.25bis HDLC as the dialing method and protocol used by the modem. This is also known as bit-oriented protocol. This framing protocol uses flag, address and control characters before the text block and a frame sequence check and flag after the text block.

DTR=Dirs – Allows the modem to automatically dial the number stored in directory location 1 whenever DTR turns ON. NOTE: DTR dialing cannot be used if dial access security is enabled. RS-366A – Selects EIA RS-366-A as the dialing method and protocol; used (and available) only with Model 3811

modems. RS-366-A is a parallel interface typically used in older IBMr synchronous environments. Refer to Table E-2 in Appendix E for pinout information.

AT&T Exclusive – Enables a subset of the proprietary AT&T command set, which is required for some applications that use AT&T equipment. Currently, the only application supported is AT&T DATAKIT.

For Async Dial and UNIX Dial, AT is the factory default. For Sync Dial and Sync Leased, Disable is the factory default.

AT commands for AT are &M0, &M1, &M3, &Q0, &Q1, and &Q3. AT commands for Disable are &M231, &M236, &Q231, and &Q236. AT commands for V.25bis Async are &M232 and &Q232. AT commands for V.25bis Bisync are &M233 and &Q233. AT commands for V.25bis HDLC are &M234 and &Q234. AT commands for DTR=Dirs dialing are &M2 and &Q2.

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COMSPHERE 3800 Series Modems

Table 9-2

(2 of 5)

DTE Dialer Configuration Options

*AT Escape Char: 043 ASCI Nxt " 043 ASCI

AT Escape Character. The escape sequence (+++) allows you to move back and forth between Command mode and Data mode. The ASCII value of the escape character (43 ASCII) can be set to any ASCII value from 1 ASCII to 255 ASCII. However, the escape character is disabled if a value greater than 127 ASCII is entered. When disabled, the call must be disconnected to return to Command mode.

The factory default is 43 (ASCII AT escape character).

AT command is S-register S2 = AT command to disable is S-register S2 = return to Command mode unless disconnected.)

*Escape GuardTim: 1sec Nxt 1sec 200msec 400msec 600msec 800msec 2sec

Escape Guard Time. Determines the length of the required pause before and after the escape sequence is issued. The guard time prevents the modem from interpreting data as the escape sequence characters.

The factory default is 1 second. AT command is S-register S12 =

, where n is a value from 1 to 127.

, where n is a value from 0 to 255 in 20 millisecond increments.

where n is a value from 128 to 255. (When disabled, the modem cannot

*BreakForceEscap: Disable Nxt Disable Enable

Break Forces Escape. Determines whether or not the modem should enter Command mode when it receives a break character from the DTE.

Disable – A break character is sent to the remote end. Enable

The factory default is Disable. AT commands to enable are \K0, \K2, or \K4.

AT commands to disable are \K1, \K3, or \K5.

*CommandCharEcho: Enable Nxt Enable Disable

Command Character Echo. Controls whether or not characters are echoed back to the DTE when the modem is in Command mode.

The factory default is Enable. AT command to disable Command Data Echo is E0.

AT command to enable Command Data Echo is E1.

*CarriageRtn Char: 013 ASCI Nxt ↑ 013 ASCI

Carriage Return Character. Allows you to change the ASCII character used to terminate an AT command to any ASCII value from 0 to 127.

The factory default is 13 (ASCII carriage return). AT command for Carriage Return Character is S-register S3 =

* This configuration option only appears if DTE Dialer Type is configured for AT.

– Modem escapes into AT Command mode, and a break character is not sent to the remote end.

, where n is a value from 0 to 127.

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Page 79

Configure Branch

Table 9-2

(3 of 5)

DTE Dialer Configuration Options

*Backspace Char: 008 ASCI Nxt ↑ 008 ASCI

Backspace Character. Sets the character used to perform a backspace in Command mode. The factory default is 08 (ASCII backspace character). AT command is S-register S5 = n, where n is a value from 0 to 127.

*Linefeed Char: 010 ASCI Nxt ↑ 010 ASCI

Line Feed Character. Sets the character used to perform a line feed in Command mode for responses from the modem. The factory default is 10 (ASCII line feed character). AT command for Line Feed Character is S-register S4 = n, where n is a value from 0 to 127.

*Result Codes: Enable Nxt Enable Disable EnableInOrig

Result Codes. Result codes are informational messages (such as Connect and Ring) sent from the modem and displayed on the asynchronous DTE terminal. (For a list of result codes, refer to Table B-1 in Appendix B.)

Enable Disable – Modem does not send result codes to the DTE. EnableInOrig – For UNIX applications, enable result codes only on the originating modem. This prevents the DTE on

the answer side from interpreting result codes as login attempts. For Async Dial, Enable is the factory default.

For UNIX Dial, EnableInOrig is the factory default. AT command to enable is Q0.

AT command to disable is Q1. AT command to enable in Originate mode is Q2.

*ExtendResltCode: Enable Nxt Enable Disable Add/EC Add/V42,MNP Use_DTE_Rate

Extended Result Codes. Informational messages such as VF data rate and Error Control are displayed with the result codes. (For a list of Extended Result Codes, refer to Table B-1 in Appendix B.)

Enable – Result codes include NO DIALTONE, BUSY, NO ANSWER rate).

Disable – Only OK, CONNECT, RING, NO CARRIER NOTE: NO DIALTONE is valid only if Dial Tone Detect configuration option is enabled. BUSY appears if Busy Detect

Add/EC – Places the EC suffix after the result code text if error control is used. For example, CONNECT 9600/EC Add/V.42,MNP – Places either the /V.42 or /MNP suffix after the result code text if data compression is used. For

example, CONNECT 9600/V42b. Use DTE Rate – Allows the DTE rate to be displayed in the Connect message instead of the line rate. This feature is

required in some modem pooling applications. The factory default is Enable.

AT command to disable is X0. AT commands to enable are X1, X2, X3, or X4. AT command for Add/EC is X5. AT command for Add/V42, MNP is X6. AT command for Use DTE Rate is X7.

* This configuration option only appears if DTE Dialer Type is configured for AT.

– Modem sends result codes to the DTE.

configuration option is enabled.

, and

ERROR result codes appear.

CONNECT xxxx (where xxxx is the VF data

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COMSPHERE 3800 Series Modems

Table 9-2

(4 of 5)

DTE Dialer Configuration Options

*ResultCode Form: Words Nxt Words Numbers (1) Numbers (2)

Result Codes Format. Controls whether or not result codes appear as words or as numeric codes. Some DTEs do not recognize Result Codes as words; therefore, numbers are required. The Numbers (2) format is required for some modem pooling applications. (For a list of result codes, refer to Table B-1 in Appendix B.)

The factory default is Words. AT command for Numbers (1) is V0.

AT command for Words format is V1. AT command for Numbers (2) is V2.

*AT Cmnd Mode: Normal Nxt Normal No_ERROR NoStrapOrERR

AT Command Mode. Determines how the modem responds to valid and invalid AT commands. NOTE: Since this configuration option affects AT commands, it cannot be changed by the AT&F command. However

can be changed by selecting a factory preset configuration via the DCP.

Normal – Allows normal operation of the AT command set. The modem acts upon all valid AT commands and issues the ERROR result code for invalid commands. If a string with multiple commands is entered, then an invalid command within that string will prevent the execution of subsequent valid commands.

, it

No ERROR – Operates similar to Normal mode, however, the modem does not issue an ERROR result code for invalid commands. When an invalid command is encountered, the modem ignores it and issues the OK result code. If a string with multiple commands is entered, then an invalid command within that string will not prevent the execution of subsequent valid commands.

No Strap or ERROR – Ignores all AT commands (including valid commands) that cause a configuration option to change. Only nonconfiguring commands (for example ATD, ATA, and ATI) are executed; the ERROR result code is never returned.

The factory default is Normal.

AT command is S-register S84 = ERROR.

V25bis Coding: ASCII Nxt ASCII EBCDIC

V.25bis Coding. Identifies to the modem whether the DTE is using ASCII code or EBCDIC code for V.25bis commands. The modem responds to the DTE using the same coding.

NOTE: This configuration option only appears if DTE Dialer is configured for V25bis HDLC or V25bis Bsync. The factory default is ASCII.

AT command is S-register S62 =

V25bis IdleFill: Mark Nxt Mark Flag

V.25bis Idle Fill. Determines whether a mark or flag is used as an idle fill character for the DTE. The modem responds to the DTE using the same idle fill.

NOTE: This configuration option only appears if DTE Dialer is configured for V25bis HDLC. The factory default is Mark.

AT command is S-register S63 =

* This configuration option only appears if DTE Dialer Type is configured for AT.

, where n is 0 or 231 for Normal, 1 or 232 for No ERROR, or 2 or 233 for No Strap or

, where n is 0 for ASCII or 1 for EBCDIC.

, where n is 0 for Mark or 1 for Flag.

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Configure Branch

Table 9-2

(5 of 5)

DTE Dialer Configuration Options

V.25b NewLineChr: CR+LF Nxt CR+LF CR LF

V.25bis New Line Character. Sets the modem for the command line terminator used by the DTE in V.25bis Async mode. The modem responds to the DTE using the same line terminator.

NOTE: This configuration option only appears if DTE Dialer is configured for V25bis Async. The factory default is CR+LF.

AT command is S-register S64 =

DTR Cont Repeat: Disable End Disable Enable

DTR Cont Repeat. Determines whether automatic redialing stops after the directory locations defined by DTR Auto Redial (S37) have all been tried unsuccessfully once. If DTR Cont Repeat is enabled, automatic redialing starts again with directory location 1. The default is Disable.

A redial attempt is made in response to a bad phone number, a busy signal, no answer, or no quiet answer. However lockout from redialing occurs if ten successive failing call attempts are made to the same number.

DTR Cont Repeat is accessible only if the DTE Dialer Type is DTR=Dirs.

Disable – Automatic redialing will not be repeated. Enable – Automatic will be repeated if necessary.

AT command is S-register S38 = n, where n is 0 for Disable and 1 for Enable.

, where n is 0 for carriage return and line feed, 1 for carriage return, or 2 for line feed.

, a

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COMSPHERE 3800 Series Modems

Line Dialer

Table 9-3 shows each Line Dialer configuration option

as it appears on the LCD, with the Async Dial factory

The Line Dialer configuration options establish parameters used by the modem to answer or originate calls.

T commands.

Table 9-3

(1 of 6)

Line Dialer Configuration Options

AutoAnswerRing#: Nxt 1 Disable 246810

Auto-Answer Ring Count. Determines the number of rings necessary before the answering modem answers an incoming call. For example, if this option is set for 2, then the answering modem answers after the second ring.

NOTE: Although DCP selections are limited (1, 2, 4, 6, 8, or 10), values set by AT commands can display from 1 to

255 rings.

Disable – If selected, the modem must be answered using either the DCP’s Answer command or Tlk/Data function or via AT commands.

The factory default is 1. AT command to disable is S0 = 0.

AT command is S-register S0 =

where n is a ring count from 1 to 255.

Dialer Type: Tone Nxt Tone Pulse

Dialer Type. Selects either tone (DTMF) dialing or pulse (rotary) dialing mode. The factory default is Tone. AT command for tone dialing is T

AT command for pulse dialing is P.

DialTone Detect: Enable Nxt Enable Disable

Dial Tone Detect. Sets the modem for dial tone detection (enable) or blind dialing (disable). Enable – Modem disconnects the call if a dial tone is not detected within 10 seconds and displays No Dial Tone

the LCD and asynchronous DTE terminal. Disable – Modem dials a call whether or not it detects a dial tone on the line. This is known as blind dialing. The period

of time the modem waits before dialing is specified in the Blind Dial Pause configuration option. The factory default is Enable.

AT commands to disable are X0, X1, and X3. AT commands to enable are X2, X4, X5, X6, and X7.

on both

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Configure Branch

Table 9-3

(2 of 6)

Line Dialer Configuration Options

Blind Dial Paus: 2sec Nxt 2sec 4sec 6sec 8sec 10sec 20sec

Blind Dial Pause. Determines how long the modem waits before dialing a telephone number when DialTone Detect is disabled.

NOTE: The Blind Dial Pause configuration option only appears when the Dial Tone Detect configuration option is

disabled.

The factory default is 2sec.

where

AT command is S-register S6 =

BusyTone Detect: Enable Nxt Enable Disable

Busy Tone Detect. Sets the modem to monitor for Busy Tone (Enable) or ignore Busy Tone (Disable). This configuration option is normally enabled; however, if the modem receives false busy tones, this configuration option

can be disabled and the modem ignores all busy tones. The factory default is Enable. AT commands to disable are X0, X1, and X2.

AT commands to enable are X3, X4, X5, X6, and X7.

is a value from 2 to 255 in 1-second increments.

‘‘,” Pause Time: 2sec Nxt 2sec 4sec 6sec 8sec 10sec 20sec

Pause Time. Determines the number of seconds the modem pauses when it encounters a comma (,) in the dial command string.

NOTE: Although DCP selections are limited (2, 4, 6, 8, 10, or 20), values set by the AT commands can display from 0 to

255 seconds.

The factory default is 2sec.

AT command is S-register S8 =

NoAnswer Timout: 45sec Nxt 45sec 30sec 60sec 120sec

No Answer Abort Time-out. Determines the number of seconds an originating modem waits before abandoning a call attempt when no answer tone is received.

NOTE: Although DCP selections are limited (30, 45, 60, or 120), values set by AT commands can display from 1 to

255 seconds.

The factory default is 45sec. AT command for No Answer Timeout is S-register S7 =

where n is a value from 0 to 255 in 1-second increments.

, where n is a value from 1 to 255 in 1-second increments.

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COMSPHERE 3800 Series Modems

Table 9-3

(3 of 6)

Line Dialer Configuration Options

Fast Disconnect: Disable Nxt Disable Enable

Fast Disconnect. Allows the modem to disconnect immediately after receiving a disconnect command from a local DTE or its own diagnostic control panel.

Disable – The modem follows its normal disconnect sequence by issuing a cleardown sequence or long space disconnect. This is also known as a graceful disconnect since the other modem receives advance notice of a disconnection.

Enable – Use this setting if the DTE requires that the modem be made available as soon as possible after receiving a disconnect command.

NOTE: This abrupt method of disconnecting may cause problems with the remote modem, which may interpret the

disconnection as an error instead of a valid disconnect.

The factory default is Disable.

AT command is S-register S85 =

Line Crnt Disc: Enab(>8msec) Nxt Enab(>8msec) Enab(>90msec) Disable

, where n is 0 for Disable and 1 for Enable.

Line Current Disconnect. Determines the modem’s response to short interruptions of line current. The loss of line current is one method of disconnecting a call.

Enable > 8-millisecond – Disconnects the modems if line current is disrupted for more than 8 milliseconds. Enable > 90-millisecond – Disconnects the modems if line current is disrupted for more than 90-milliseconds. Use this

setting if the modem constantly disconnects when set for Enab(>8msec). Disable – Ignores any disruptions in line current such as call waiting. The factory default is Enab(>8msec).

AT command is S-register S65 =

Long Space Disc: Enable Nxt Enable Disable

Long Space Disconnect. Determines the modem’s response to a continuous spacing condition sent from the remote modem when it goes on-hook. Issuing a long space is one method of disconnecting a call.

NOTE: This configuration option is ignored when the modem operates in Synchronous mode or Dial Backup mode. Enable – Modem disconnects if it receives a continuous space from the DTE. The modem’s transmitter will transmit

4 seconds of long space upon a disconnect. Disable – Modem does not disconnect if it receives a continuous space from the DTE. Modem will not transmit a long

space disconnect. For Async Dial, UNIX Dial, and Sync Leased, Enable is the factory default.

For Sync Dial, Disable is the factory default. AT command for Disable is Y0.

AT command for Enable is Y1.

, where n is 0 for Enable (>8 msec), 1 for Enable (>90 msec), and 2 for Disable.

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Configure Branch

Table 9-3

(4 of 6)

Line Dialer Configuration Options

No Carrier Disc: 2sec Nxt 2sec 5sec Disable 10sec 20sec

No Carrier Disconnect. If the modem no longer receives carrier from the remote modem, it disconnects the call. This configuration option determines how long carrier is Off before the modem disconnects. Loss of carrier is one method of disconnecting a call.

2, 5, 10, 20 sec

20 seconds. Disable – Modem does not disconnect if carrier turns Off. The factory default is 2sec.

AT command is S-register S10 =

No Data Disc: Disable Nxt Disable 10min 30min 60min

No Data Disconnect. Forces the modem to disconnect if no data is transmitted or received within a specified amount of time.

Disable – Modem remains connected despite the lack of data flow. 10, 30, 60 min – Modem disconnects if data is not received or transmitted within 10-minute, 30-minute, or 60-minute

intervals. The factory default is Disable. The reloading of factory defaults does not affect No Data Disconnect.

AT command to enable is \T

– Modem disconnects if carrier turns Off for more than 2 seconds, 5 seconds, 10 seconds, or

where n is 255 for disable or 0 to 254 in 0.1 second increments for enable.

, where n is a value from 1 minute to 255 minutes. AT command to disable is \T0.

NoDataDiscTrig Nxt TXD or RXD TXD and RXD TXD Only RXD Only

No Data Disconnect Trigger Signal. Works in conjunction with No Data Disconnect (\T), and determines whether Pin 2 (transmit data) or Pin 3 (receive data) of the modem’s RS-232 serial interface is monitored so that the modem can disconnect the call if there is no activity for a certain period of time.

The No Data Disconnect Trigger Signal configuration option is unavailable and is not displayed on the DCP when No Data Disconnect is disabled. The factory default is TXD or RXD. The reloading of factory defaults does not affect No Data Disconnect Trigger Signal.

TXD or RXD – Disconnect if no data transmitted or received for specified period. TXD and RXD – Disconnect if no data transmitted and received for specified period. TXD Only – Disconnect if no data transmitted for specified period. RXD Only – Disconnect if no data received for specified period.

AT command is S80 =

S80 = 0 Transmit or Receive S80 = 1 Transmit Only S80 = 2 Receive Only S80 = 3 Transmit and Receive

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COMSPHERE 3800 Series Modems

Table 9-3

(5 of 6)

Line Dialer Configuration Options

Auto Make Busy: Disable Nxt Disable Enable

Automatic Make Busy. Forces the modem to go off-hook under the following conditions: a local analog loopback is performed, a self-test is performed, or if the modem is switched to the service line. This option is only valid with the Model 381

NOTE: This configuration option should only be used when the modem is located behind a user’s Private Branch

The factory default is Disable. AT command is S-register S40 = n, where n is 0 for Disable and 1 for Enable.

MakeBusyViaDTR: Disable Nxt Disable Enable

Make Busy Via DTR. Determines if the modem goes off-hook when DTR is Off. Enable this setting if the DTE normally keeps DTR ON and turns DTR Off when the DTE cannot accept a call.

NOTE: This configuration option should only be used when the modem is located behind a user’s Private Branch

The factory default is Disable. AT command is S-register S69 = n, where n is 0 for Disable and 1 for Enable.

1 and does not appear on the Model 3810’

Exchange (PBX). The Make Busy Network Interface Module (NIM) must be installed on the COMSPHERE 3000 Series Carrier. Refer to the

Exchange (PBX). For 3811 modems, the MakeBusy Network Interface Modules (NIMs) must be installed on the COMSPHERE 3000 Series Carrier. Refer to the

COMSPHERE 3000 Series Carrier

s or Model 3820’s LCD.

, Installation Manual

COMSPHERE 3000 Series Carrier

, Installation Manual.

DTR Auto Redial Nxt Dir 1 Dirs 1-2 Dirs 1-3 Dirs 1-4 Dirs 1-5 Dirs 1-6 Dirs 1-7 Dirs 1-8 Dirs 1-9 Dirs 1-10

DTR Auto Redial. Defines the number of directory locations the modem may access when prior dialing attempts fail. For example, the selection Dirs1-10 means that all ten directory locations may be tied. The default is directory location 1 only.

DTR Auto Redial represents the same internal setting as that accessed with the Auto Redial configuration option in the Leased-Line group. However, DTR Auto Redial is in effect (and can be accessed) only if the DTE Dialer Type is DTR=Dirs.

Dir 1 The modem will use only Directory Location 1 for automatic dial backups. Dirs 1-2 The modem will use Directory Location 2 in the event of call failure using Directory Location 1. Dirs 1-3 The modem will use Directory Location 3 in the event of call failure using the preceding entries.

SSS

Dirs 1-10 The modem will use Directory Location 10 in the event of call failure using the preceding entries.

AT command is S-register S37 =

S37 = 0 Use Directory Location 1 S37 = 1 Use Directory Locations 1–2 S37 = 2 Use Directory Locations 1–3 S37 = 3 Use Directory Locations 1–4

SS S SS S

S37 = 9 Use Directory Locations 1–10

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Configure Branch

Table 9-3

(6 of 6)

Line Dialer Configuration Options

MI/MIC Dialing: Disable End Disable Enable

MI/MIC Dialing. Also known as D-Lead signaling, is required by some PBX systems, older data phones, and security callback systems. It forces the modem into the originate handshake after first dialing a call.

Disable – Modem ignores activity on the MI/MIC contacts. Enable – When Pins 3 and 6 of the TELCO jack (Models 3810 and 3820) are connected then disconnected, the modem

goes off-hook and looks for the answer sequence from the remote modem. If the sequence is detected, the local modem will handshake and connect with the remote modem. A 26-pin D-Lead control connector is located on the rear of the 3000 Series Carrier. This connector is used for MI/MIC Dialing for Model 3811 modems.

The factory default is Disable.

AT command is S-register S83 =

, where n is 0 for Disable and 1 for Enable.

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COMSPHERE 3800 Series Modems

Dial Line

Table 9-4 shows each Dial Line configuration option as

it appears on the LCD, with the Async Dial factory default

The Dial Line configuration options are used to configure the modem for operation over dial lines.

setting (the default value if the modem is just being installed) shown following the colon (:) on the first line and with all available selections listed on the second line. Following this is a description of the configuration option, a description of the available selections, and any equivalent A

T commands.

Table 9-4

(1 of 3)

Dial Line Configuration Options

Dial LineRate: 19200(V32t) Nxt 19200(V32t) 16800(V32t) 14400(V32b) 12000(V32b) 9600(V32b) 7200(V32b) 4800(V32b) 2400(V22bis) 1200(V22) 1200(212A) 0–300(V21) 0–300(103J)

Dial Line Rate. This configuration option determines the modem’s data rate and modulation scheme for operation on dial lines. Online changes do not take effect until a disconnect occurs.

19200(V32t), 16800(V32t), 14400(V32b), 12000(V32b), 9600(V32b), 7200(V32b), 4800(V32b) – The modem operates

terbo

using V.32 to a lower data rate.

2400(V22bis), 1200 (V22), 1200(212A) – Modem operates using the modulation and data rate selected. 0–300(V21), 0–300(103J) – Modem operates in full-duplex, Asynchronous mode. These data rates do not support V.42

or MNPt error control. The factory default is 19200(V32t).

AT command for Dial Line Rate is S-register S41 =

1 = 14,400 (V.32bis) 7 = 1200 (V.22) 2 = 12,000 (V.32bis) 8 = 1200 (212A) 3 = 9600 (V.32bis/V.32) 10 = 0–300 (V21) 4 = 7200 (V.32bis) 11 = 0–300 (103J) 5 = 4800 (V.32bis/V.32) 20 = 19,200 (V.32 6 = 2400 (V.22bis) 21 = 16,800 (V.32

, V.32bis, or V.32 modulation at the data rate selected. The modem can be forced by the remote modem

where n is:

terbo

; default)

terbo)

V32bis Automode: Enable Nxt Enable Disable System 85

Enable – The modem automatically adapts to the modulation scheme and line rate of the remote modem. However

maximum data rate the modem uses is determined by the Dial Line Rate configuration option. Bell 103J protocol is used for data rates of 0–300 bps.

Disable – Connection fails if the remote modem does not support the selected modulation. System 85 – Modifies parameters used by the connection process. Specify System 85 only if your modem is in a

modem pool attached to a System 85 Private Branch Exchange (PBX). The factory default is Enable.

AT command is S-register S78 =

9-26 November 1996 3810-A2-GB30-20

, where n is 0 for Enable,1 for Disable, or 2 for System 85.

, the

Page 89

Configure Branch

Table 9-4

(2 of 3)

Dial Line Configuration Options

V32bis Autorate: Enable Nxt Enable Disable StartAt48 StartAt96

Enable – Once connected, the modem automatically lowers the line rate if line conditions become impaired. When line

conditions improve, the modem automatically shifts up to the highest data rate the line can support. This autorating only occurs between 14,400 bps and 4800 bps during V.32/V.32bis connections.

Disable – Line rate does not vary. StartAt48, StartAt96 – Useful for lines with known noise problems, these settings cause the modem to connect at

4,800 bps (StartAt48) or 9,600 bps (StartAt96). If line conditions warrant it, the modem shifts up to the next higher rate until 14,400 bps or the highest possible rate for the line is reached.

The factory default is Enable.

AT command for V.32bis Autorate is S-register S76 = StartAt96.

Dial TX Level: Permissv(–9) Nxt Permissv(–9) Programmable –10 dBm –11 dBm –12 dBm –13 dBm –14 dBm –15 dBm –16 dBm –17 dBm –18 dBm –19 dBm –20 dBm –21 dBm –22 dBm –23 dBm –24 dBm –25 dBm –26 dBm –27 dBm –28 dBm –29 dBm –30 dBm –31 dBm –32 dBm ETC 1.0_Cell ETC 1.1_Cell

, where n is 0 for Enable, 1 for Disable, 2 for StartAt48, and 3 for

Dial Transmit Level. Sets the power output level of the transmit signal over dial lines. Permissive (–9 dBm) – The modem transmits data at approximately –9 dBm. This is true whether the modem is

connected to an RJ11-type permissive jack or to an RJ41 or RJ45 programmable jack. Programmable – The modem transmits at a predetermined level set by programming a resistor in the RJ41 or RJ45

jack. The program resistor value is only read upon power-up or after reset. ETC 1.0_Cell – Transmit level is automatically adjusted in response to line conditions according to the proprietary

Enhanced Throughput Cellular 1.0 specification. Use only with remote modems set to ETC 1.0_Cell, and limit the data rate to 4800 bps.

ETC 1.1_Cell – Transmit level is automatically adjusted in response to line conditions according to the proprietary Enhanced Throughput Cellular 1.1 specification.

The factory default is Permissv(–9). AT command for Permissive mode is &J0.

AT command for Programmable mode is &J1. AT commands for –10 through –32 dBm are &I10 through &I32. AT command for ETC 1.0_Cell is &I99. AT command for ETC 1.1_Cell is &I100.

V22b Guard Tone: Disable Nxt Disable 550Hz 1800Hz

V.22bis Guard Tone. Determines whether the V.22bis guard tone is disabled, set to 550 Hz, or set to 1800 Hz.

Disable – No guard tone. 550 Hz or 1800 Hz – When the modem is in Answer mode, it transmits the guard tone at this frequency.

The factory default is Disable. AT command to disable is &G0. AT command for 550 Hz is &G1.

AT command for 1800 Hz is &G2.

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COMSPHERE 3800 Series Modems

Table 9-4

(3 of 3)

Dial Line Configuration Options

V32bis Train: Long Nxt Long Short

V.32bis Train. Controls V.32bis and V.32 train. Determines whether minimum or maximum time durations are used during the V.32bis/V.32 handshaking sequence for both dial and 4-wire/2-wire leased line applications.

NOTE: This configuration option only appears when the Dial Line Rate configuration option is set for Auto:148-3 or any

fixed V.32bis data rate.

Long – Selects long train. Use this setting whenever far-end frequency offset (phase roll) may be encountered. This is usually only required when transmitting over satellite links.

Short – Allows the modem to train-up faster when using V.32bis/V The factory default is Long.

AT command is S-register S43 = n, where n is 0 for Long and 1 for Short.

FallFwdDelay: Disable End Disable 5_mins 15_mins 1_hour

Fall Forward Delay. Provides an initial delay before leased or dial lines are monitored for fall forward conditions. After the timer expires, monitoring occurs as usual. Possible delay times are 5 minutes, 15 minutes, or 1 hour.

The factory default is Disable (no delay).

NOTE:

There is no analogous AT command, so this option is not available for modems without a shared or integral DCP.

Fall Forward Delay appears under both the Dial Line configuration options and the Leased Line configuration

options, but the same setting is used for both. Changing it in one place effectively changes it in the other.

.32 modulation.

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Configure Branch

Leased Line

Table 9-5 shows each Leased Line configuration option

as it appears on the LCD, with the Async Dial factory

The Leased Line configuration options are used to configure the modem for operation over leased lines.

The Leased Line configuration group only appears if the modem is configured with the Sync Leased factory preset template, or when the &L1, &L2, &L3, or &L4 command is issued.

T commands.

Table 9-5

(1 of 5)

Leased Line Configuration Options

Leased Mode: 4WLL-Orig Nxt 4WLL-Orig 4WLL-Ans 2WLL-Orig 2WLL-Ans

Leased Mode. Sets the modem for either 2-wire or 4-wire operation in Answer mode (receiving a call) or 2-wire or 4-wire operation in Originate (initiating a call) mode. The only options available for Model 3820 modems are 2WLLOrig and 2WLL-Ans.

NOTE:

For Sync Leased Answer Mode, 4-wire Answer is the factory default. (Two-wire Answer for the Model 3820.) For Sync Leased Originate Mode, 4-wire Originate is the factory default. (Two-wire Originate for the Model 3820.)

AT command for Disable is &L0. AT command for 2-wire Originate is &L1. AT command for 4-wire Originate is &L2. AT command for 2-wire Answer is &L3. AT command for 4-wire Answer is &L4.

For proper operation over leased lines, one modem must be set for Originate mode and the other set for Answer

mode.

LeasedLine Rate: 14400(V32b) Nxt 19200(V32t) 16800(V32t) 14400(V32b) 12000(V32b) 9600(V32b) 7200(V32b) 4800(V32b) 2400(V22bis)

Leased-Line Rate. Determines the modem’s data rate and modulation scheme for operation on leased lines. 19200(V.32t), 16800(V32t), 14400(V.32bis), 12000(V.32bis), 9600(V.32bis), 7200(V.32bis), 4800(V.32bis) – These

modulation schemes are available on 2-wire or 4-wire leased lines. If a fixed V.32bis rate is selected, the modem can still be commanded to fall back by a remote modem.

NOTE: The modem must be in Direct mode before the modulation scheme can be changed from V.32bis to another

leased-line modulation (V.33 or V.22bis). See Err Contrl Mode configuration option for more about Direct mode. On leased lines, V.42 error control and Buffer mode are only supported by V.32bis. An error occurs if the modem is not in Direct mode when the modulation is changed from V.32bis. In asynchronous mode using V.22bis, the DTE rate must equal the leased-line rate.

2400(V.22bis) – This modulation scheme is available on 2-wire and 4-wire leased lines. NOTE: It is recommended that both modems use the same fixed data rate.

The factory default is 19200(V32t).

AT command is S-register S44 =

0, 1 = 14,400 bps (V.32bis) 5 = 4800 bps (V.32bis)

2 = 12,000 bps (V.32bis) 6 = 2400 bps (V.22bis) 3 = 9600 bps (V.32bis) 18 = 19,200 (V.32 4 = 7200 bps (V.32bis) 19 = 16,800 (V.32

where n is:

terbo terbo

; default) )

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COMSPHERE 3800 Series Modems

Table 9-5

(2 of 5)

Leased Line Configuration Options

V32bis Autorate: Enable Nxt Enable Disable

V.32bis Autorate. Once connected, the modem automatically lowers the line rate if line conditions become impaired. When line conditions improve, the modem automatically shifts up to the highest data rate the line can support. This autorating only occurs between 14,400 bps and 4800 bps during V.32/V.32bis connections.

The factory default is Enable.

AT command for V.32bis Autorate is S-register S82 =

Leased TX Level: 0 Nxt0–1–2–3–4–5–6–7–8–9–10–11–12–

Leased Transmit Level. Selects the modem’s transmit power level over leased lines. The transmit output level can be selected in 1 dBm decrements from 0 dBm to –15 dBm.

The factory default is 0 dBm.

, where

AT command is S-register S45 =

is a value from 0 to 15 corresponding from 0 dBm to –15 dBm.

where n is 0 for Enable and 1 for Disable.

13 –14 –

1800HzTrainTone: Disable Nxt Disable Enable

1800 Hz Training Tone. This configuration option is for communicating with certain modems that do not comply with the V.32 standard. When 1800 Hz Training Tone is enabled, a short burst of 1800 Hz (AC) tone is sent to the answering modem to prompt it to answer. This is not required for V.32-compliant modems.

The factory default is Disable.

AT command is S-register S34 =

, where n is 0 for Disable and 1 for Enable.

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(3 of 5)

Leased Line Configuration Options

BdLn Auto Orig: Disable Nxt Disable Enable FastBackup 2_min 5_min 10_min

Bad Lines Auto Originate. Allows the modem to dial the number stored in directory location 1 to restore communications with the remote modem when the leased lines fail.

This configuration option must be enabled in both the local and remote modem. The Answer mode modem must have its Auto-Answer Ring Number configuration option enabled. Refer to the Line Dialer configuration option group for information regarding Auto-Answer.

Disable – The modem will not perform a Bad Lines Auto Originate. Enable – The modem will originate a call after 30 seconds of continuous bad-line conditions. FastBackup – The modem will originate a call after 20 seconds of continuous bad-line conditions. 2_min – The modem will originate a call after 2 minutes of continuous bad-line conditions. 5_min – The modem will originate a call after 5 minutes of continuous bad-line conditions. 10_min – The modem will originate a call after 10 minutes of continuous bad-line conditions.

This configuration option is not available on the Model 3820. The factory default is Disable.

AT command is S-register S46 =

S46 = 0 Disable S46 = 1 30 Seconds S46 = 2 20 Seconds S46 = 3 60 Seconds S46 = 4 90 Seconds S46 = 5 120 Seconds

S S

S46 = 21 600 Seconds

Note that the effect of S46 = 2 is out of sequence with the other values.

S S

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Table 9-5

(4 of 5)

Leased Line Configuration Options

Rate Auto Orig: Disable Nxt Disable OnFlBkTo48 OnFlBkTo72 OnFlBkTo96 OnFlBkTo120 OnFlBkTo144 OnFlBkTo168

Rate Auto Originate. Initiates a dial backup call, using the phone number in directory location 1, when the leased-line rate of the modem falls back to or below a certain speed.

Disable – The modem will not perform a Rate Auto Originate. OnFlBkTo48 – If the leased-line rate of the modem falls back to 4800 bps, a dial backup attempt will be initiated. OnFlBkTo72 – If the leased-line rate of the modem falls back to 7200 bps, a dial backup attempt will be initiated. OnFlBkTo96 – If the leased-line rate of the modem falls back to 9600 bps, a dial backup attempt will be initiated. OnFlBkTo120 – If the leased-line rate of the modem falls back to 12,000 bps, a dial backup attempt will be initiated. OnFlBkTo144 – If the leased-line rate of the modem falls back to 14,400 bps, a dial backup attempt will be initiated. This

is available only on modems with the V.32 OnFlBkTo168 – If the leased-line rate of the modem falls back to 16,800 bps, a dial backup attempt will be initiated. This

is available only on modems with the V.32 AT command is S36 = n:

S36 = 0 Disable S36 = 1 OnFlBkTo48 S36 = 2 OnFlBkTo72 S36 = 3 OnFlBkTo96 S36 = 4 OnFlBkTo120 S36 = 5 OnFlBkTo144 S36 = 6 OnFlBkTo168

NOTE

Rate Auto-Originate is valid only when V.32bis Autorate is enabled (S76 = 0).

terbo

feature.

Auto Redial Nxt Dir_1 Dirs_1-2 Dirs_1-3 Dirs_1-4 Dirs_1-5 Dirs_1-6 Dirs_1-7 Dirs_1-8 Dirs_1-9 Dirs_1-10

Auto Redial. Works in conjunction with the Bad Lines Auto Originate and Rate Auto Originate options. It allows repeated automatic dial backup attempts by specifying the range of Directory Locations that can be tried. The modem must be in Originate mode.

Dir_1 – The modem will use only Directory Location 1 for automatic dial backups. Dirs_1-2 – The modem will use Directory Location 2 in the event of call failure using Directory Location 1. Dirs_1-3 – The modem will use Directory Location 3 in the event of call failure using the preceding entries.

SS S SS S

Dirs_1-10 – The modem will use Directory Location 10 in the event of call failure using the preceding entries. AT command is S-register S35 = n:

S35 = 0 Use Directory Location 1 S35 = 1 Use Directory Locations 1–2 S35 = 2 Use Directory Locations 1–3 S35 = 3 Use Directory Locations 1–4

SS S SS S

S35 = 9 Use Directory Locations 1–10

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Leased Line Configuration Options

AutoDialStandby: Disable Nxt Disable 15min 30min 1hr 4hr Test(2min) Adv15min Adv30min Adv1hr AdvTest2min

Automatic Dial Standby. Permits a modem operating on dial lines (regardless of the method of dialing origination) to check the quality of the leased lines periodically and, if they are good, to disconnect from the dial lines and resume operations on the leased lines.

This configuration option is not available on the Model 3820. The time interval that the modem uses to check the quality of the leased lines is determined by the configuration option.

These intervals are 15 minutes, 1 hour, and 4 hours. The normal settings cause a lapse of data flow on the dial line while the leased-line connection is checked. The

Advanced settings allow data flow to continue without interruption while the leased line is evaluated. If Advanced

settings are used, then both modems must be configured to the same Advanced setting.

The Test(2min) selections are for testing this feature only. The factory default is Disable.

AT command is S-register S47 =

S47 = 0 Disable S47 = 1 15min S47 = 2 1hr S47 = 3 4hrs S47 = 4 Test(2min) S47 = 5 Advanced 15min S47 = 6 Advanced 1hr S47 = 7 Advanced 4hrs S47 = 8 Advanced Test(2min)

CarrierOn Level: –43dbm Nxt –43dbm –26dbm

Carrier On Level. This configuration option controls the carrier detection threshold for leased lines. When the power level of the receive carrier signal drops 2 dBm below this level (either –26 dBm or –43 dBm), LSD turns Off. When the carrier signal is greater than this level, LSD turns ON.

The factory default is –43dbm.

AT command is S-register S48 =

FallFwdDelay: Disable End Disable 5_mins 15_mins 1_hour

The factory default is Disable (no delay).

NOTE:

There is no analogous AT command, so this configuration option is not available for modems without a shared or integral DCP.

Fall Forward Delay appears under both the Dial Line configuration options and the Leased Line configuration

options, but the same setting is used for both. Changing it in one place effectively changes it in the other.

where n is 0 for –43 dBm or 1 for –26 dBm.

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V.42/MNP/Buffer

able 9-6 shows each V

.42/MNP/Buffer configuration

option as it appears on the LCD, with the Async Dial

V.42/MNP/Buffer configuration options determine the type of error correction and flow control used by the modems and attached DTEs.

Some choices within this group may not appear depending upon how previous configuration options have been selected. If the Async/Sync Mode configuration

factory default setting (the default value if the modem is just being installed) shown following the colon (:) on the first line and with all available selections listed on the second line. Following this is a description of the configuration option, a description of the available selections, and any equivalent A

T commands.

option is set for synchronous operation (see DTE Interface configuration options group), then the V.42/MNP/Buffer group does not appear on the LCD. Any changes made to configuration options within this group only take effect after a disconnect.

Table 9-6

(1 of 6)

V.42/MNP/Buffer Configuration Options

*Err Contrl Mode: V42/MNPorBfr Nxt V42/MNPorBfr V42/MNPorDsc MNP_or_Buffr MNP_or_Disc Buffer ModeDirectMode LAPM_or_Disc LAPM_or_Buffr

Determines the type of error control used by the modem. In most cases, V42/MNPorBfr is the best choice. If V.42bis and MNP are enabled, then the modem uses the following priority for error control negotiation: V.42bis, V.42, MNP 5 and below. Online changes do not take effect until a disconnect occurs.

V.42/MNP or Buffer – Modem attempts to connect in V.42 Error Control mode. If this fails, the modem attempts to connect in MNP mode. If this fails, the modem connects in Buffer mode and continues operation. This is also known as V42/MNP Autoreliable Mode.

V.42/MNP or Disconnect – Modem attempts to connect in V.42 Error Control mode. If this fails, the modem attempts to connect in MNP mode. If this fails, the modem disconnects. This is also known as Reliable mode.

MNP or Buffer – Modem attempts to connect in MNP mode. If this fails, the modem connects in Buffer mode. This is also known as MNP Autoreliable Mode.

MNP or Disconnect – Modem attempts to connect in MNP mode. If this fails, the modem disconnects. This is also known as Reliable mode.

Buffer Mode – Modem does not use error control and allows the DTE rate to differ from the communications line rate. This mode should only be used if the DTE provides its own error control or if errors in data can be tolerated. This setting is also known as Normal mode and is valid even if the remote modem is set for Direct mode.

*This configuration option is only available if Async/Sync Mode is configured for Async. Refer to the DTE Interface

configuration options group for more on Async/Sync Mode.

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Table 9-6

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V.42/MNP/Buffer Configuration Options

*Err Contrl Mode (cont.) Direct Mode – Modem connects at a data rate equal to or less than the initial DTE interface rate. (The modem never

connects at a data rate greater than the initial DTE rate.) If the modem connects at a data rate lower than the DTE rate, the DTE must then adjust its data rate to equal the modem rate. Ultimately, the modem speed and DTE speed must be the same. Direct mode does not support error control or data buffering.

LAPM or Disconnect – Modem attempts to connect in V.42 Link Access Procedure for Modems (LAPM) error control mode. If this fails, the modem attempts to connect in MNP mode. If this fails, the modem disconnects. This setting should be used for cellular connections (at both the mobile and PSTN sides) when it is known that both sides support V.42.

LAPM or Buffer – Modem attempts to connect in V.42 LAPM error control mode. If this fails, the modem attempts to connect in MNP mode. If this fails, the modem connects in Buffer mode and continues operation.

NOTE: The modem must be reconfigured for Direct mode before changing the leased-line modulation if V.42 error

For Async Dial and UNIX Dial, V42/MNPorBfr is the factory default. For Sync Dial and Sync Leased, DirectMode is the factory default.

AT command for Buffer Mode is \N0. AT command for Direct Mode is \N1. AT command for MNP or Disconnect is \N2. AT command for MNP or Buffer is \N3. AT command for V42/MNP or Disconnect is \N4. AT command for V42/MNP or Buffer is \N5. AT Command for LAPM or Disconnect is \N6. AT Command for LAPM or Buffer is \N7.

control or Buffer mode are enabled with V.32bis on leased lines.

*V42bis Compress: Enable Nxt Enable Disable

V.42bis Compression. Enables or disables V.42bis data compression. Enable – Data compression operates in both the transmit and receive directions. This is the recommended setting for all

applications. Disable – V.42bis data compression is disabled. This is rarely needed because V.42bis data compression does not

cause data expansion for compressed data. The factory default is Enable.

NOTE:

AT command for Disable is ″H0. AT commands for Enable are ″H1, ″H2, or ″H3.

*MNP5 Compress: Enable Nxt Enable Disable

MNP5 Compression. Determines if the modem uses MNP Class 5 data compression. It can be set independently of V.42bis data compression. Online changes do not take effect until a disconnect occurs.

The factory default is Enable. NOTE: This configuration option is only available if Error Control Mode configuration option is set for V42/MNPorBfr,

AT command for Disable is %C0. AT command for Enable is %C1.

*This configuration option is only available if Async/Sync Mode is configured for Async. Refer to the DTE Interface

configuration options group for more on Async/Sync Mode.

This configuration option is only available if Error Control Mode configuration option is set for V42/MNPorBfr or

V42/MNPorDsc.

V42/MNPorDsc, MNP or Buffr, or MNP or Disc.

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Table 9-6

(3 of 6)

V.42/MNP/Buffer Configuration Options

*EC Negotiat Bfr: Disable Nxt Disable Enable Disab&Switch

Error Control Negotiate Buffer. Determines if the answering modem buffers the data that it received from the remote modem during an interval in which the modem attempts to establish a connection using error control. Online changes do not take effect until a disconnect occurs.

Disable – Data is not buffered during the link negotiating (handshaking) sequence. Enable – Data is buffered while the link is being established. Initialization data is not passed on the DTE during the

handshaking sequence. Disable and Switch – Data is not buffered during the handshaking sequence. However, when the modem receives an

error control fallback character, it switches to Buffer mode. (See EC Fallback Char configuration option.) The factory default is Disable.

AT command for Disable is \C0. AT command for Enable is \C1. AT command for Disab&Switch is \C2.

*EC Fallbck Char: 013 ASCI Nxt " 013 ASCI

Error Control Fallback Character. This configuration option allows you to enter the ASCII value of the error control fallback character. This provides the remote modem with the ability to end the error control link negotiating (handshaking) sequence by sending this character. The modems will connect in Buffer mode (no error control). Online changes do not take effect until a disconnect occurs.

When the modem receives this fallback character it switches to Buffer mode and transmits an EC fallback character to the DTE. When comparing incoming characters for a match against the EC fallback character, the modem ignores parity.

The factory default is 13 ASCII. NOTE: This configuration option is only available if EC Negotiate Buffer is configured for Disab&Switch.

AT command is %A

*Flw Cntl of DTE: CTS_to_DTE Nxt CTS_to_DTE Disable XON/XOFF

Flow Control of DTE. Determines how the modem controls the flow of data from the DTE. CTS to DTE – Method of flow control in which the modem raises and lowers its CTS interface lead to indicate when the

DTE should start and stop sending data.

Disable – The modem cannot control the flow of data from the DTE. XON/XOFF – Method of flow control in which the modem sends XON and XOFF characters to the DTE to start and stop

the flow of data. The factory default is CTS to DTE.

AT commands for Disable are \Q0, \Q5, and \Q6. AT commands for XON/XOFF are \Q1 and\Q4. AT commands for CTS to DTE are \Q2 and \Q3.

*This configuration option is only available if Async/Sync Mode is configured for Async. Refer to the DTE Interface

configuration options group for more on Async/Sync Mode.

, where n is a value from 0 to 127.

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Table 9-6

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V.42/MNP/Buffer Configuration Options

*Flw Cntl of Mdm: Disable Nxt Disable XON/XOFF RTS_to_Mdm

Flow Control of Modem. Determines how the DTE controls the flow of data from the modem.

Disable – The DTE cannot control the flow of data from the modem. XON/XOFF – Method of flow control in which the modem starts and stops data flow based upon XON and XOFF

characters received from the DTE. RTS to Modem – Method of flow control in which the modem respectively starts and stops data transmission based

upon the ON and Off state of the DTE’s RTS signal. The factory default is Disable.

AT commands for Disable are \Q0, \Q2, and \Q4. AT commands for XON/XOFF are \Q1 and \Q5. AT commands for CTS to DTE are \Q3 and \Q6.

*XON/XOFF Psthru: Disable Nxt Disable Enable

XON/XOFF Passthrough. Considers an XON/XOFF character as data and passes it on to the remote modem. In this case, the DTE at one end of the communications link can send flow control characters to the other DTE. This is also known as DTE to DTE flow control.

Disable – Flow control characters are processed but are not passed on to the remote modem. Enable – Flow control characters are processed and passed on to the remote modem.

The factory default is Disable.

NOTE:

AT command for Disable is \X0. AT command for Enable is \X1.

*Mdm/Mdm FlowCtl: Disable Nxt Disable Enable

Modem-to-Modem Flow Control. If a modem’s buffers begin to fill due to data it is receiving from the remote modem, but is not passing on to the DTE, it can issue XON/XOFF flow control characters to the remote modem. This only applies if Buffer (nonerror control) mode is selected. If Error Control mode is enabled, flow control between the modems will happen automatically, regardless of the setting of this option.

Disable – Modem does not respond to XON and XOFF characters received over the VF line. Also, the modem will not transmit an XOFF character to the remote end if its receive buffers are full.

Enable – Modem stops transmitting data to the remote modem if it receives an XOFF character over the VF line. An XON character will enable data transmission. Also, the modem will transmit an XOFF character to the remote end if its receive buffers are full. Select this setting if the DTE rate is less than the VF line rate or if the DTE must frequently stop the flow of data to process it.

The factory default is Disable. NOTE: This configuration option is only available if Flow Control is configured for XON/XOFF.

AT Command for Disable is \G0. AT Command for Enable is \G1.

*This configuration option is only available if Async/Sync Mode is configured for Async. Refer to the DTE Interface

configuration options group for more on Async/Sync Mode.

This configuration option is only available if the Flow Control configuration option is configured for XON/XOFF.

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Table 9-6

(5 of 6)

V.42/MNP/Buffer Configuration Options

*Break Buffr Ctl: Keep_Data Nxt Keep_Data Discard_Data

Break Buffer Control. Determines if data stored in the modem’s buffer is saved or discarded when the DTE issues a break sequence.

Keep Data (Nondestructive mode) – Saves the data in the buffer in both the local and remote modems. Discard Data (Destructive mode) – Empties the data buffer. Only buffers in the same direction of travel as the break

are discarded. The factory default is Keep Data.

NOTE: This configuration option is ignored if the Break Forces Escape configuration option (see DTE Dialer

AT commands for Discard Data are \K0 and \K1. AT commands for Keep Data are \K2, \K3, \K4, and \K5.

*Send Break Cntl: Data_First Nxt Data_First Break_First

configuration options group) is enabled.

Send Break Control. Determines what is sent from the modem first, data or break if a break sequence is sent from the DTE.

Data First (Nonexpedited) – A break is treated as a data character and is sent in the order it was received. This is also known as Nonexpedited mode.

Break First (Expedited) – A break is sent before the data currently in the buffer. This is also known as Expedited mode. The factory default is Data First.

NOTE: This configuration option is ignored if the Break Forces Escape configuration option (see DTE Dialer

AT commands for Break First are \K0, \K1, \K2, and \K3. AT commands for Data First are \K4 and \K5.

*TXBuffDiscDelay: 10sec Nxt 10sec 60sec Disable

The Transmit Buffer Disconnect Delay is the maximum amount of time the modem can continue to send data in its Transmit Buffer to the remote modem after it is commanded by the DTE to disconnect. Disable means that the disconnect occurs immediately. The default is 10 seconds.

Disable – Modem disconnects immediately without attempting to send data stored in its buffers. 10, 60 sec

and 60 sec), the modem disconnects much sooner if it can empty its buffers. NOTE: This configuration option is not available if Error Control Mode configuration option is set for DirectMode. AT command is S-register S49 =

*This configuration option is only available if Async/Sync Mode is configured for Async. Refer to the DTE Interface

configuration options group) is enabled.

– Maximum amount of time the modem tries to empty its buffers before disconnecting. In both cases (10 sec

, where n is 0 for Disable and any value from 1 to 255 in 1 second increments.

configuration options group for more on Async/Sync Mode.

9-38 November 1996 3810-A2-GB30-20