Paradyne KeepInTouch 3760, KeepInTouch 3762, KeepInTouch 3763, KeepInTouch 3764 User Manual

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You have accessed an older version of a Paradyne product document.

Paradyne is no longer a subsidiary of AT& T. Any re f e rence to AT&T Paradyne is amended to read Paradyne Corporation.

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3760-A2-GB91-20

Issue 3

April 1994

KeepInTouch Card Modem

Models 3760, 3762, 3763, and 3764

User’s Guide

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A Issue 3 April 1994

  

Notice

This publication is protected by federal copyright law. No part of this publication may be copied or distributed, transcribed, stored in a retrieval system, or 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 AT&T Paradyne Corporation, 8545 126th Ave. N., P.O. Box 2826, Largo, Florida 34649-2826.

AT&T Paradyne Corporation makes no representation or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for a particular purpose. Further, AT&T Paradyne Corporation reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of AT&T Paradyne Corporation to notify any person of such revision or changes.

Changes and enhancements to the product and to the information herein will be documented and issued as a new release or a Technical Update Memo (TUM) to this manual.

A Reader’s Comments form is provided at the front of this publication and your comments are appreciated. If the form has been removed, address comments to AT&T Paradyne Corporation, Technical Publications, 8545 126th Ave. N., P.O. Box 2826, Largo, Florida 34649-2826. AT&T Paradyne may use or distribute any of the information supplied, as appropriate, without incurring any obligation whatsoever.

* AT&T Paradyne is a member of AT&T’s Communications

Products group.

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Issue 3 April 1994

Trademarks

AT is a trademark of Hayes Microcomputer Products, Inc. AXCELL is a trademark of Spectrum Cellular Corporation. ETC is a trademark of AT&T. EXTRA! is a registered trademark of Attachmate Corporation. Hayes is a registered trademark of Hayes Microcomputer Products,

ąą

Inc.

KeepInTouch and KIT are trademarks of AT&T. MNP is a trademark of Microcom, Inc. Motorola is a registered trademark of Motorola, Inc. MS-DOS (DOS) is a registered trademark of Microsoft Corporation.

All other product names are copyrighted and registered trademarks of their respective owners.

Warranty

A limited warranty is provided with this product. Refer to the enclosed Warranty Card for more information.

  

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

2. 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.

3. 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.

4. 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.

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5. 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, implement corrective action prior to 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.

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.

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United States

NOTICE TO USERS OF THE PUBLIC SWITCHED TELEPHONE NETWORK

1. This 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. If requested, this information must be provided to the telephone company.

2. The Universal Service Order Code (USOC) associated with the services the equipment is to be connected is RJ11C.

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

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

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

6. If your modem needs to be returned for repair or replacement, follow the return policy as indicated on your warranty card.

7. No repairs may be made by the end use customer.

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8. This modem 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 message clearly contains in a margin at the top or bottom of each transmitted page or on the first page of the transmission, the date and time it is sent and an identification of the business or other entity, or other individual sending the message and the telephone number of the sending machine of such business, or 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 is 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.

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EMI Warnings

WARNING:

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction, may cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on. The user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna

Increase the separation between the equipment and receiver

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected

Consult the dealer or an experienced radio/TV technician for help

WARNING:

The authority to operate this equipment is conditioned by the requirement that no modifications will be made to the equipment unless the changes or modifications are expressly approved by AT&T Paradyne.

To comply with Part 15 FCC Regulations, the snap-on ferrite clamp supplied with the Model 3762 modem’s cellular direct connect interface cable must be installed. Refer to the installation procedures provided with the cable for instructions.

To Users of Digital Apparatus in Canada: This digital apparatus does not exceed the Class B limits for

radio noise emissions from digital apparatus set out in the radio interference regulations of the Canadian Department of Communications.

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Le presént appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la Classe B prescrites dans le règlement sur le brouillage radioélectrique édicté par Le Ministère des Communications du Canada.

Canada

NOTICE TO THE 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’s inside wiring associated with a single 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.

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.

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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 modem’s label. 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, return it to its place of purchase or arrange to have your equipment repaired by contacting Inventory Control Office, 100 York Blvd., Suite 200, Richmond Hill, Ontario L4B1J8, telephone (416) 494-0453.

United Kingdom

Facilities

This apparatus has been approved for the use of the following facilities:

Modem

Automatic call initiation

Detection of initial proceed indication

Auto Answering

Operation in the absence of proceed indication

Auto Clear from the call originating end

Storage of telephone numbers for retrieval by a predetermined code

Multifrequency and Loop Disconnect signalling

Any other usage will invalidate the approval of the apparatus if as a result it then ceases to comply with the standards against which approval was granted.

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When entering network addresses into the dialing directory, please ensure that the telephone numbers are correct.

Interconnection circuits between this modem and any other equipment should be such that the equipment continues to comply with the requirements of clause 4.2 of EN41003 for TNV (Telephone Network Voltage) circuits and clause 2.3 of EN 60950 for SELV (Safety Extra Low Voltage) circuits after making connection between circuits.

The power supply must be properly connected and switched on before the modem will work correctly.

Ringer Equivalence Number

The Ringer Equivalence Number (REN) is a customer guide indicating approximately the maximum number of items of apparatus that should be connected simultaneously to the telephone line. The sum of the RENs should not exceed four. This value includes any BT provided instrument which may be assumed to have a REN of 1 unless marked otherwise. The REN of the KeepInTouch Card modem is listed in Appendix B,

Technical Specifications.

WARNING:

Do not connect any other items of apparatus in parallel with this modem.

Telephone Line

The modem may be connected to the following circuits:

Direct exchange lines of the public switched telephone network, but not shared service or 1+1 carrier systems. The line should provide either loop disconnect or multifrequency signalling.

The modem may also be connected as an extension to a compatible PABX, although there is no guarantee of correct working in all circumstances.

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Power Requirements

It is a condition of approval that the power required by the host and the total of all adapter cards installed within the host environment, together with any auxiliary apparatus, does not exceed the power specification as stated in the Technical Reference Material of the host apparatus. The power requirements for the KeepInTouch Card modem are 5V and 1 Watt.

In order to maintain the independent approval of this card, it is essential that other optional cards do no use (or generate) mains Voltages or any other hazardous voltage. A hazardous voltage is one which exceeds 42.24V peak a.c. or 60V d.c. If you have doubt, seek advice from a competent engineer before installing other adapters into the hoist equipment.

The equipment must be installed such that with the exception of the connections to the host, clearance and creepage distances shown in Table 1 are maintained between the card and any other assemblies which use or generate a voltage shown in the table. The larger distance shown in brackets applies where the local environment within the host is subject to conductive pollution or dry non-conductive pollution which could become conductive due to condensation. Failure to maintain these minimum distances would invalidate the approval.

Table 1. Power Requirements (United Kingdom) Clearance

(mm)

Creepage (mm)

Voltage used or Generated by Host or Other Cards

2.0

2.6

4.0

2.4 (3.8)

3.0 (4.8)

5.0 (8.0)

6.4 (10.0)

Up to 50 Vms or Vdc Up to 125 Vms or Vdc Up to 250 Vms or Vdc Up to 300 Vms or Vdc

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Contents

1 Introduction

Welcome to the World of Portable, High-Speed Data

Communications! 1-1

KeepInTouch Card Modem Package 1-2

Supplied Equipment 1-2 Required Equipment 1-4

Where to Find Additional Information 1-5

2 Installation

KeepInTouch Card Modem Installation Procedures 2-1

Model 3760 and Model 3762 Installation

Procedures 2-1

Model 3763 and Model 3764 Installation

Procedures 2-4

Configuring Your PC to Use the

KeepInTouch Card Modem 2-5

Fax Application Software 2-7

Using Hayes AutoSync 2-7

3 Using Your Modem

Using AT Commands 3-1

Making a Call with Your Modem 3-3

Disconnecting a Call 3-4

Manually Answering a Call 3-6

Viewing, Selecting, and Saving Modem Settings 3-6

Operating Modes (Command and Data) 3-7

Switching Between Data Mode and Online

Command Mode Using the Escape Sequence 3-7

Changing Modem Modulations and Modem Speed 3-8

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Contents

An Overview of File Transfers and Fax Operation 3-9

File Transfers 3-9 Fax Operation 3-10

Using Cellular Channels 3-10

4 AT Command Set and S-Registers

AT Commands and S-Registers 4-1

Country Specific Information 4-29

A Troubleshooting A-1

B Technical Specifications B-1

C Result Codes C-1

D Cellular Communications

Connecting your Modem for Cellular Operation D-1

Direct Connection to a Cellular Telephone D-2 Connection to a Cellular Telephone through

an RJ11 Adapter Box D-2

Configuring Your Modem for Cellular Operation D-3

Automatic Cellular Setup for

Direct Connection on the Cellular Side D-3

&F5 Cellular Setup for RJ11 Adapter

Connection on the Cellular Side D-4

&F6 Cellular Setup for Connection

on the PSTN Side D-5

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Contents

ETC Protocol and Interworking with

Non-ETC Modems D-6

Placing a Call Through a Public Switched

Telephone Network (PSTN) D-6

Placing a Call Through a Modem Pool D-7

Fax over Cellular D-7

Tips for Successful Cellular Operation D-8

Overview of Cellular Communication D-9

GL Glossary GL-1

IN Index IN-1

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Figures

1 Introduction

1-1 Supplied Equipment 1-3

2 Installation

2-1 Model 3760 and Model 3762

Modem Installation 2-2

2-2 Model 3763 and Model 3764

Modem Installation 2-4

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Tables

4 AT Command Set and S-Registers

4-1 AT Command and S-Register Reference 4-2

4-2 Country Specific AT Command and

S-Register Values 4-29

4-3 Other Country-Specific Information 4-30

A Troubleshooting

A-1 Modem Health A-2

A-2 Modem — Computer Connection A-3

A-3 Modem — Telephone Line Connection A-4

A-4 Online Operation A-9

A-5 Fax Operation A-10

B Technical Specifications

B-1 Technical Specifications B-1

C Result Codes

C-1 Result Codes C-1

D Cellular Communications

D-1 Automatic Cellular Setup

Configuration Parameters D-4

D-2 &F5 Cellular Setup Configuration Parameters D-4

D-3 &F6 Cellular Setup Configuration Parameters D-6

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Introduction

Welcome to the World of Portable, High-Speed Data Communications!

Congratulations on your purchase of the AT&T Paradyne KeepInTouch Card modem. The KeepInTouch Card is a credit card size modem that combines high-speed V.32 bis data communications with Group 3 send-and-receive fax capability. The modem fits into any notebook or laptop personal computer that has a Personal Computer Memory Card International Association (PCMCIA) Release 2 socket and allows you to keep in touch with your home or office from anywhere around the world.

The KeepInTouch Card family of modems includes Models 3760, 3761, 3762, 3763, and 3764. This manual contains information on Model 3760, Model 3762, Model 3763, and Model 3764.

Model 3763 and Model 3764 are intended for international (particularly European) applications only and are not for use in North America.

The KeepInTouch Card high-speed modem can transmit and receive information over a standard telephone line at 14,400 bits per second. It is compatible with a variety of modem standards, allowing it to communicate with slower modems. To ensure error-free data transfers, the KeepInTouch Card modem employs V.42 and MNPt Levels 4–2 error control. To increase effective data throughput and reduce the duration of calls, the

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modem utilizes both V.42 bis and MNP5 data compression standards to achieve peak transmission rates up to 57,600 bps.

For fax operation, the modem supports both Class 1 and Class 2 fax standards. Class 1 fax places most of the processing burden on the software while Class 2 fax places it on the modem. In addition, the modem also supports the CCITT V.17 fax protocol which allows fax transfers to occur over standard telephone lines at 14,400 bps. To take advantage of the 14,400 bps data rate, you must connect to a fax machine or fax modem that also supports the V.17 protocol.

KeepInTouch Card modems Model 3762 and Model 3764 also support transmission over a cellular network. These models use the ETCt (Enhanced Throughput Cellular) protocol which improves data communications over cellular telephone channels. For more information about cellular operation, refer to Appendix D,

Cellular Communications

The Hayesr AutoSync feature is also available in selected models of the KeepInTouch Card modem. For more information on Hayes AutoSync, refer to the

Using Hayes AutoSync

section

in Chapter 2,

Installation.

KeepInTouch Card Modem Package

The following sections describe what equipment is supplied and what equipment is required to install and operate the modem (see Figure 1-1).

Supplied Equipment

The following hardware and software is included with the modem:

One KeepInTouch Card modem

One user’s guide

(For Model 3760 and Model 3762 only:) A 2-pin modular telephone cord.

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(For Model 3763 and Model 3764 only:) A 25-pin modular connector attached to a 2-meter-long telephone cord, terminated by a telephone plug which is specific to the country in which it will be used.

The following items are optional and may not be packaged with your modem:

One KeepInTouch Card Installation Utilities support software diskette (3.5”) containing both configuration and utility programs, and help text files which contain instructions on how to use the utility programs as well as detailed information on the ATt command set.

NOTE:

If your modem is included as part of your PC purchase, then a KeepInTouch Card Installation Utilities diskette may not ship with the modem.

Diskettes and user’s guides for software which allows you to send data and fax transmissions.

A technical information update sheet (if necessary).

Figure 1-1. Supplied Equipment

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Required Equipment

The following additional hardware and software is necessary to install and operate the modem.

A notebook or laptop personal computer that supports a PCMCIA Release 2.0 socket.

A communications software application to allow the PC to control the modem (if not supplied with your modem). This type of software application will allow you to use your modem to transfer files to and from your PC, receive electronic mail (e-mail), dial into bulletin boards, etc.

If fax operations are desired, you will also need fax application software to control fax operation (if not supplied with your modem).

For connection to a normal telephone line you need:

A telephone outlet.

For connection to a cellular telephone channel (available with selected models only) you need:

A cellular telephone,

A Cellular Direct Connect Cable specific to your type and model of cellular telephone. For more information about equipment for cellular operation, refer to Appendix D,

Cellular Communications

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Where to Find Additional Information

There are help text files (also called “readme” files) available which contain information to supplement this user’s guide. The help text files may contain information which is more recent than what is printed in this user’s guide. The files cover a variety of topics, including modem installation, tutorial information, AT command usage, and cellular operation. These help text files are available through the following sources:

The files are on the Installation Utilities diskette which may have been packaged with your modem.

If you did not receive an Installation Utilities diskette and your modem was included in a PC purchase, your PC vendor may have loaded the files from the diskette onto the hard drive for you.

The help text files are also available on a Bulletin Board System (BBS). To access the BBS, see your warranty card for the telephone number, or contact your modem vendor. The BBS always contains the most up-to-date versions of the help text files.

To read the information in the help text files, you may use the “readme” program provided on the Installation Utilities diskette or you may use a word processing application or text editor. The files are in ASCII format. To use the readme program provided on the Installation Utilities diskette:

TYPE: a

:\README

a:filename

where a is the letter designated for your PC’s floppy drive,

and

filename

is the name of the help text file

you want to view, such as

readme.txt.

PRESS:

Enter

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Installation

KeepInTouch Card Modem Installation Procedures

The following section describes how to install Models 3760, 3762, 3763, and 3764 of the KeepInTouch Card modem. Please take a minute to review these procedures before installing your modem.

Model 3760 and Model 3762 Installation Procedures

Use Figure 2-1 and the following procedures to install Model 3760 and Model 3762 modems.

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Figure 2-1. Model 3760 and Model 3762 Modem Installation

1. Locate an unused PCMCIA socket on your PC. Refer to your PC’s user’s guide for more information about the PCMCIA socket.

2. Hold the modem so that the product logo label is facing up, and the 68-pin connector is facing the PCMCIA socket.

Insert the modem into the socket, pushing it all the way in so that all 68 pins are engaged.

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3. Connection to a Telephone Outlet If you intend to use regular telephone lines, use the 7-foot

cord that has the 2-pin connector and use this step. If, however, you intend to use a cellular telephone, refer to the

Direct Connection to a Cellular Telephone

section in

Appendix D,

Cellular Communications

Plug the modular cord’s 2-pin connector into the modem’s 2-pin rear edge connector. Since the 2-pin connector is not keyed, it does not matter which way it is plugged in.

Next, plug the cord’s modular telephone plug into the telephone jack.

4. Make sure that your modem is installed and that your PCMCIA slot is configured for modem operation before using a communications or fax application. Refer to the section

Configuring Your PC to Use the KeepInTouch Card

Modem

later in this chapter.

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Model 3763 and Model 3764 Installation Procedures

Use Figure 2-2 and the following procedures to install Model 3763 and Model 3764 modems.

Figure 2-2. Model 3763 and Model 3764 Modem Installation

1. Locate an unused PCMCIA socket on your PC. Refer to your PC’s user’s guide for more information about the PCMCIA socket

2. Hold the modem so that the product logo label is facing up, and the 68-pin connector is facing the PCMCIA socket.

Insert the modem into the socket, pushing it all the way in so that all 68 pins are engaged. Note that PC power can be ON or Off.

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3. Connection to a Telephone Outlet If you intend to use regular telephone lines, use this step. If,

however, you intend to use a cellular telephone, refer to the

Direct Connection to a Cellular Telephone

section in

Appendix D,

Cellular Communications,

then continue with

Step 4. Plug the telephone line connector’s 25-pin plug (registration

label facing up) into the modem’s 25-pin rear edge connector.

4. Insert the plug end of the telephone line connector’s modular telephone cord into a telephone outlet.

5. Make sure that your modem is installed and that your PCMCIA slot is configured for modem operation before using a communications or fax application.

Configuring Your PC to Use the KeepInTouch Card Modem

After installing the modem in your PC, you need to configure your PC to recognize your KeepInTouch Card modem. Some KeepInTouch Card modems are shipped with an Installation Utilities diskette. This diskette contains a configuration program which will check your PC and modem configuration.

NOTE:

If your modem is included as part of your PC purchase, your PC supplier may have loaded the files from the Installation Utilities diskette, or their own installation utilities, onto your hard drive. If you did not receive a copy of the diskette, check to see if the files are already on your hard drive. Note, however, that not all PCs require installation utilities. If you did not receive a diskette and there are no installation utilities on your hard drive, then your PC supplier has already configured your PC for PCMCIA operation and you are not required to perform an installation procedure.

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Perform the following steps to configure your KeepInTouch Card modem on your PC:

1. Review the diskette’s help text files before continuing. These files contain information on the utility programs and will guide you through the configuration process. For more information on viewing the help text files, see the section

Where to Find Additional Information

in Chapter 1,

Introduction.

2. Run the INSTALL program by inserting the diskette into the floppy drive and typing the following command at the DOS prompt:

TYPE: a

:\install

where

is the designated letter for your floppy

drive.

PRESS:

Enter

3. Review the documentation that came with your PC to see if your PC supports PCMCIA Card Service and Socket Services (modem drivers).

If your PC

does

include these modem drivers, no further steps are required to configure your modem — do not proceed to Step 4. Your PC is now set up to recognize your KeepInTouch Card modem in the PCMCIA slot.

If your PC

does not

include these drivers, or if you are

unsure, proceed to the next step.

4. Select the “Configure the KITt Card Modem” option to invoke the CONFIG program. The CONFIG program examines COM port availability and reconfigures the modem and PCMCIA socket for modem operation.

Refer to the help text files on the diskette for more information on using the CONFIG program.

Other utilities included on the diskette are the diagnostic, upgrade, and hot insertion programs. The diagnostic program is useful in testing the modem and isolating problems. The upgrade program is used to update the firmware level of the modem when new releases become available. (Note, however, that the upgrade feature is not available for Model 3760 and Model 3763.) Hot insertion allows you to insert or remove the modem while the PC is powered ON (most newer PCs already include support for this feature in their Card and Socket

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Services). For more information on these programs, refer to the help text files included on the diskette.

Fax Application Software

Some KeepInTouch Card modems ship with software which will allow you to send and receive facsimiles. Follow the installation and operation instructions which are packaged with the fax software.

Before installing any fax software, make sure the modem is connected to your computer and turned ON.

Using Hayes AutoSync

Hayesr AutoSync is available in Model 3762 and Model 3764. The Hayes AutoSync feature allows your modem to establish a

call between an asynchronous computer and a synchronous mainframe computer. The advantage of this is that it eliminates the need for a synchronous interface card in your PC.

To use this feature, a Hayes AutoSync communications package, such as EXTRA!r Extended for DOSr by Attachmate, must be used.

After using the Hayes AutoSync feature, it is recommended that you reload your modem’s original configuration settings to avoid possible conflicts during normal modem operation. The procedure for reloading modem settings is discussed in Chapter 3,

Using Y our Modem

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  

This chapter highlights some of the basic functions and commands necessary to operate your modem. Whether you consider yourself a novice or an experienced user in data communications, you may want to read through some of the examples to become familiar with your modem’s operation.

Using AT Commands

The KeepInTouch Card modem uses AT commands and S-Registers to control its operation and firmware configuration.

These commands are issued from your computer through your communications software package.

Your modem is compatible with the standard Hayes AT command set, the most common commands used throughout the industry, and also uses what is known as an extended AT command set: those commands unique to the KeepInTouch Card modem. All of these commands are listed in Chapter 4,

Command Set and S-Registers.

Please review the following guidelines before using any AT Commands.

AT commands must be entered while the modem is in either Command mode or online Command mode. The escape sequence (+++) is used to enter online Command mode from Data mode. (For more information, refer to the

Operating Modes (Command

and Data)

section found later in this chapter.)

All commands (except A/ (repeat last command) and +++ (escape sequence)) must begin with the characters AT and end by pressing the Enter key.

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The AT (or at) prefix (which means attention) can be upper- or lowercase, but the modem will not recognize mixed case prefixes (At or aT).

The data character format (how your data is structured) for the AT command set must be one of the following. It can be set using your communications software:

– 8 data bits + no parity + 1 stop bit. – 7 data bits + parity + 1 stop bit (parity can be

odd, even, mark, or space).

Commands can be entered one at a time or in strings (several commands at once – for example, AT&F5&W). Strings can have up to 40 characters after the AT prefix. Spaces, parentheses, and hyphens are not considered characters.

Commands described in this manual with the suffix

have several options associated with them. For example, in the E

command, E0 disables the modem’s ability to echo characters back to your screen while E1 allows the modem to echo characters back to the screen. If no value is entered for the

suffix, the modem assumes a zero (0) value (in this case, the echo function is turned Off).

Valid commands are acknowledged with numeric or word result codes (unless the result codes have been disabled using the Q1 command). Appendix C lists all available result codes with numeric and word equivalents.

NOTE:

All commands supported by the KeepInTouch Card modem are described in Chapter 4,

AT Command Set and

S-Registers

. For more detailed information on the AT command set, refer to the help text file “atcmds.txt” on the Installation Utilities diskette.

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Making a Call with Your Modem

The dial command (D) is used to initiate a call. When the modem receives this command, it goes off-hook (connects the modem to the phone line so that a call can be made), and dials the telephone number entered. Going off-hook is similar to picking up a telephone’s handset.

Dial command strings contain the dial command, dial modifiers, and the telephone number. A dial modifier tells the modem to perform additional tasks when dialing a telephone

number. The following can be used as dial modifiers: T – Touch-tone dialing. Any digit 0—9, * , # , A, B, C, or D can

be dialed as tone.

P – Pulse dialing. Only the digits 0—9 can be dialed in Pulse

Dial mode.

- , ( ), and Space. These characters are ignored by the dial

string and can be included in the dial string to enhance readability.

, – Pause. Causes the modem to pause before processing the

next character in the dial string. The length of this pause is determined by the value held in S-Register S8, the Pause Time configuration option.

W – Wait for dial tone. Modem waits for a second dial tone

before processing the dial string. For example, if you must dial a 9 to reach an outside telephone line, the W modifier delays the modem from dialing until it receives a second dial tone for the outside line.

R – Reverse Dial mode. Causes the originating modem to

send out an answer tone 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. For correct operation, at least one ringback must be detected; therefore, the remote modem should be placed off-hook into originate mode on the second ring or later.

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@ – Quiet answer. Wait for five seconds of silence after dialing

the number. If the silence is not detected, the modem sends a NO ANSWER result to the computer.

! – Hook flash. This causes the modem to go on-hook for a

specific time period, then return to off-hook. The amount of time the modem will be on-hook varies by country. Refer to Table 4-3 in Chapter 4 for the hook flash time period for your country.

; – Return to Command mode. Allows AT command strings

that exceed the 40-character limit to be linked together. This is useful when using a calling card number or an international telephone number. Modem returns to Command mode after dialing a number without disconnecting the call.

A dial string example for a

local call using tone dialing

TYPE:

ATDT 5551234 where

is the dial command, T is the Tone dialing

modifier, and

555-1234

is the telephone number.

PRESS:

Enter

If you would like to know more about the function of the dial

command, refer to the following commands in Chapter 4: DL

(Dial Last Number), P (Pulse), T (Tone), &Z (Store Telephone

Numbers), S6 (Blind Dial Pause Time), S7 (No Answer

Time-out), and S8 (Dial Modifier Pause Time).

Disconnecting a Call

Three ways you can disconnect a call are the any-key abort

function, the H command, and DTR disconnect. The modem

will disconnect if any key on the keyboard is pressed while the

modem is dialing a call or is engaged in the handshaking

process. The handshaking process occurs when the two

modems connect, and then spend a brief period deciding how

they will transfer data, the speed of the transfer, and if error

control will be used. This is usually identified by the high-pitched

tones emitted by your modem.

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The any-key abort is useful if the number dialed does not

answer. Otherwise, if you do not press a key, the call will

time-out and disconnect based on the settings of other

configuration options, such as S-Register 7.

The ATH command is another method of disconnecting. Once

your call is complete, enter online Command mode and issue an

ATH command to make your modem hang up, or go on-hook.

The format and procedure for an ATH command is:

TYPE:

+++

To exit Data mode and enter online Command mode

TYPE:

ATH or ATH0

PRESS:

Enter The modem disconnects. A third, and more subtle approach to hanging up a call, is to

make sure that the &D command is set to &D2 (the factory default setting which is standard EIA RS-232 operation). This will allow your communications software to drop the DTR signal to the modem and force the modem to disconnect the call. This method is often used by communications software.

Also note that your modem will automatically disconnect when the remote modem hangs up.

If you would like to know more about disconnecting a call, refer to the following commands in Chapter 4: +++ (escape sequence), O (Return Online to Data Mode), X (Extended Result Codes, Dial Tone Detect, Busy Tone Detect), Y (Long Space Disconnect), &D (DTR Action), \N (Error Control Mode), \T (No Data Disconnect Timer), S7 (No Answer Time-out), S10 (No Carrier Disconnect), and S85 (Fast Disconnect).

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Manually Answering a Call

The best way to answer a call is to set the Auto-Answer Ring Number register (S0) to 1 or more rings. The modem is

configured at the factory to automatically answer after a specified number of rings. The number of rings used as the factory setting for S0 varies by country and is listed in Table 4-2 in Chapter 4. If S0 = 0, use the ATA command to manually answer incoming calls.

The format for an ATA command is:

TYPE:

ATA (after the modem rings)

PRESS:

Enter

NOTE:

DTR must be present (activated by the communications software) for the modem to answer the call.

Viewing, Selecting, and Saving Modem Settings

Modem settings determine how the modem functions. These settings are known as configuration options and are stored in two permanent memory areas, User 0 and User 1.

When the modem is initially turned ON, the contents of one of the two memory areas are retrieved into a volatile work area of memory known as Active. If you should make changes to the modem’s configuration and turn Off the modem without saving those changes, then they are lost forever.

On the other hand, User 0 and User 1 are nonvolatile memory areas that can permanently store configuration options to the modem’s Electrically Erasable Programmable Read Only Memory (EEPROM) chip. If your modem requires a particular configuration to work in an application, then those settings can be created and saved to one of the two nonvolatile memory areas.

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If you would like to know more about viewing, saving, and reloading factory settings, refer to the following commands in Chapter 4: &V (Result Codes Format), &W (Write/Save), &F (Select Factory Default), and Z (Reset and Load Active).

Operating Modes (Command and Data)

Before a modem goes online (establishes a successful connection with a remote modem), it is considered to be in Command mode, an idle state where you can modify its operating parameters or issue modem commands. (Any command issued is acknowledged with a response in either words or digits. These are known as a result code and are listed in Appendix C.)

Once the modems are online, either by answering or originating a call, they automatically switch to Data mode. Data mode is a state where any entries made from the computer are considered data and are transmitted and received between modems. The modems remain in Data mode until the connection is broken with a disconnect or until they are forced into online Command mode using the escape sequence (+++).

Switching Between Data Mode and Online Command Mode Using the Escape Sequence

The escape sequence allows you to exit Data mode and enter online Command mode while maintaining a connection with the remote modem. It consists of three consecutive plus (+) characters and is only valid when the KeepInTouch Card modem is online and in Data mode.

To enter online Command mode while in Data mode, enter the following sequence:

TYPE:

+++

The value of the escape sequence character (+++) and the idle time required before and after an escape sequence are determined by the S2 and S12 registers. If you want to change these values, refer to Table 4-1 in Chapter 4.

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NOTE:

The modem enters online Command mode and responds with an OK.

To return to Data mode from online Command mode, use the O command. Enter the following command:

TYPE:

ATO

PRESS:

Enter

Changing Modem Modulations and Modem Speed

A modem modulation is a set of guidelines that determine how the modems connect and at what speed they communicate. Modulations, such as V.32 bis (pronounced vee-dot 32 bis), V.32, V.22 bis, V.22, Bell 212A, V.21, Bell 103J, and V.23, have a maximum and minimum data rate, the speeds at which data is transferred over the telephone line. These rates are measured in bits per second.

For example, a V.32 bis modem can operate at data rates ranging from 14,400 bps to 4800 bps while a V.22 bis modem operates at 2400 and 1200 bps. Normally, modems using different modulations do not connect. However, through a function known as automoding, the KeepInTouch Card modem is capable of detecting and then switching to the remote modem’s modulation assuring compatibility with a variety of modems.

If there is ever a need to change modem modulations, use the %B command, which is described in Chapter 4 and in the help text file “atcmds.txt” on the Installation Utilities diskette.

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If you would like to know more about how the KeepInTouch Card modem uses modem modulations and data rates, refer to the following commands in Chapter 4: B (CCITT/Bell), S41 (Dial-Line Rate), S76 (V.32 bis Autorate for Dial-Line Operation), and S78 (V.32 bis Automode for Dial-Line Operation).

An Overview of File Transfers and Fax Operation

This section does not describe how to transfer and receive files and fax messages – your communications and fax software and their supporting documentation define this process. Its purpose is to make you aware of the basics involved when using these forms of communications with the KeepInTouch Card modem.

File Transfers

Two terms essential to file transfers are download and upload. A download occurs when you want to receive a file

from

a host

site. An upload occurs when you want to send a file

a host

site. However, before you can do this, the following must occur:

Your modem and PC must be configured for modem operation before executing your communications software.

Your modem must be online with another modem.

You must have communications software that is operating and in terminal mode.

Determine whether you want to upload or download files.

Verify that the character format (7 data bits, odd parity, 1 stop bit; 8 data bits, no parity, 1 stop bit; and so on) is the same for both the local and remote modems.

Select a file transfer protocol (ZMODEM, YMODEM, XMODEM, Kermit, and so on) that is compatible with your communications software and remote system. Some protocols require simultaneous actions at both ends of the link to start a transfer, while others permit initiation of the transfer from one side only.

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A file transfer protocol sets up the ground rules that your modem and the remote system will use to get files back and forth. Your communications software manual will describe the various protocols it supports. Your communications software will usually walk you through the download/upload process.

Fax Operation

Fax software essentially turns your computer and modem into a fax machine and allows you to send a file to or receive a file from another fax modem or fax machine.

Similar to your communications software, your fax software uses basic AT commands for functions such as dialing and answering calls and for speaker control and adjustments. Refer to your communication software’s user’s guide for more information on AT command support.

Before sending or receiving a fax, verify the following:

Your modem and PC must be configured for modem operation before executing your fax software.

You must have fax software installed on your PC. (For the KeepInTouch Card modem, if sending or receiving a fax, the software must be operating.)

Some fax software packages require the modem to have Auto-Answer disabled (S0 = 0) to receive a fax.

Some fax software packages require that the modem use software flow control (\Q) to send and receive a fax.

Refer to your fax software documentation for more on fax operation.

Using Cellular Channels

Some models of the KeepInTouch Card modem can transfer data over cellular communication channels. For more information on cellular operation, refer to Appendix D,

Cellular

Communications

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    

AT Commands and S-Registers

This chapter provides a list of all AT commands and S-Registers supported by the KeepInTouch Card modem. This chapter first lists AT commands in alphabetical order followed by S-Registers listed in numerical order. Factory settings are listed in bold.

In general, AT commands are responsible for instructing the modem to do a task, while S-Registers are responsible for determining how the AT command will perform that task. You issue these commands to your modem via your communications software. When a modem receives a command, it responds with a message, known as a result code, that displays on your monitor. Result codes are described in Appendix C.

For a brief overview of command guidelines, refer to the

Using

AT Commands

section in Chapter 3,

Using Y our Modem

. For more detailed information on the commands, refer to the help text file “atcmds.txt” on the Installation Utilities diskette.

The AT commands and S-Registers supported by the KeepInTouch Card modem are listed in Table 4-1. The acceptable values for some AT commands and S-Registers depend on the country in which your are operating your modem. For those AT Commands and S-Registers, you will be referred to Table 4-2 for the acceptable values for your country. Table 4-3 also provides command usage information which varies by country.

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Table 4-1. AT Command and S-Register Reference (1 of 27)

AT Command or S-Register

Description

+++ Escape sequence

The escape sequence allows the modem to exit Data mode and enter online Command mode.

A/ Repeat last command

Do not precede this command with an AT prefix or conclude it by pressing the Enter key.

A The Answer command allows the modem to go

off-hook and attempt to answer an incoming call.

CCITT/Bell Mode This command selects whether the modem uses the

CCITT V.21 and V.22 protocols or the Bell 103J and 212A protocols for operation at 300 or 1200 bps. It also determines whether it receives at 75 bps and transmits at 1200 bps or transmits at 75 bps and receives at 1200 bps when using CCITT V.23 protocol. This command is used in conjunction with the S41 register settings 7—13.

B0 V.21 or V.22 protocol

B1 Bell 103 or Bell212A protocol

B2 V.23 protocol (75 bps/1200 bps) B3 V.23 protocol (1200bps/75 bps) NOTE: For B2 and B3, both modems must be

configured for the same mode of operation.

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Table 4-1. AT Command and S-Register Reference (2 of 27)

AT Command or S-Register

Description

C Automatic Cellular Setup

When this feature is enabled, the modem will automatically configure itself for cellular operation when it detects a direct connection to a cellular telephone. Refer to Appendix D,

Cellular

Communications

, for more information on this

command.

NOTE:

This command is not supported in Model 3760 and Model 3763, as these models do not support cellular operation.

C0 Enables automatic cellular setup

C1 Disables automatic cellular setup

Dial This command allows the modem to begin the dialing

sequence of the dial string

(modifiers and telephone

number).

DL Dial Last Number

This command redials the last telephone number dialed. For this command to work properly, at least one valid ATD command must have been issued since the modem was turned ON.

DS=

Dial telephone number stored in directory location n.

Command Character Echo This command controls whether or not the characters

you enter from your computer’s keyboard are echoed back to

our monitor when the modem is in Command

back to your monitor when the modem is in Command

mode. E0 Disables echo

E1 Enables echo

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Table 4-1. AT Command and S-Register Reference (3 of 27)

AT Command or S-Register

Description

Hook This command lets the modem go on-hook to

disconnect a call or off-hook to busy out the telephone line.

H or H0 The modem goes on-hook. H1 The modem goes off-hook.

Identification This command displays specific information about your

modem.

I0 Displays product code–144 I1 Displays firmware revision number (three digits

only, see I19 for full display) I2 Performs an EEPROM check I3 Displays serial number I4 Displays alphanumeric modem number I5 Displays circuit card part number I6 Displays software part number I9 Displays firmware revision number I10 Allows the value of I0 to be changed to

144 (I10=0), 240 (I10=1), 480 ( I10=2),

960 ( I10=3), or 120 (I10=4) I11 Displays a ROM checksum in a hexadecimal

format

I17 Displays last fatal error recorded I19 Displays the entire firmware revision number

Speaker V olume The modem cannot adjust the volume of the PC’s

speaker. Therefore, this command has no effect. However, if this command is issued, the modem responds with an OK.

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Table 4-1. AT Command and S-Register Reference (4 of 27)

AT Command or S-Register

Description

Speaker On/Off Control M0 Speaker always Off.

M1 Speaker ON until carrier signal becomes

active.

M2 Speaker always ON.

O Return Online to Data Mode

This command allows you to exit Online Command mode and return to Data mode.

P Pulse Dial (Used with rotary telephone lines)

This command configures the modem for Pulse dialing. To disable Pulse dialing, issue the T (tone dial) command.

Result Codes

Q0 Enables result codes

Q1 Disables result codes Q2 Enable in Originate mode

Sn=

Change S-Register

= S-Register

= new value of S-Register (0 to 255)

Sn? View S-Register

= S-Register

T Tone Dial (default dialing method)

This command configures the modem for touch-tone dialing.

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Table 4-1. AT Command and S-Register Reference (5 of 27)

AT Command or S-Register

Description

Result Codes Format This command controls whether or not result codes

appear as words or as numeric codes. V0 Displays as digits (Numbers 1)

V1 Displays as text

V2 Displays as digits (Numbers 2)

(continued on next page)

Extended Result Codes, Dial Tone Detect, Busy Tone Detect

This command controls three different configuration options.

Extended Result Codes

allow additional information to

be displayed with the result code. Dial Tone Detect

, if enabled, causes the modem to wait (up to 10 seconds) for a dial tone before dialing. If disabled (also known as blind dialing), the modem dials the call regardless of dial tone detection.

NOTE:

Blind Dialing is not supported in some countries outside of North America. Therefore, dial tone detection cannot be disabled in those countries. See Table 4-3 for more information.

Busy Tone Detect

, if enabled, sets the modem to monitor for a busy tone. If disabled, the modem ignores busy tones.

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Table 4-1. AT Command and S-Register Reference (6 of 27)

AT Command or S-Register

Description

(continued from previous page)

Extended Result Codes, Dial Tone Detect, Busy Tone Detect

X0 Disables extended result codes 5–16, dial tone

detect, and busy tone detect

. See above note

concerning blind dialing.

X1 Enables extended result codes 5–16, disables

dial tone detect and busy tone detect

. See

above note concerning blind dialing.

X2 Enables extended result codes 5–16 and dial

tone detect, disables busy tone detect

X3 Enables extended result codes 5–16, disables

dial tone detect, enables busy tone detect

See above note concerning blind dialing.

X4 Enables extended result codes 5–16, dial

tone detect, and busy tone detect

X5 Adds error control suffix (REL) to extended

result codes 20–27 if error control is used, enables dial tone detect and busy tone detect.

X6 Adds either V.42 or MNP suffix to extended

result codes 20–27 if data compression is used, enabled dial tone detect and busy tone detect.

X7 Computer’s data rate appears in the Connect

message instead of the telephone line data rate, enables dial tone detect and busy tone detect.

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Table 4-1. AT Command and S-Register Reference (7 of 27)

AT Command or S-Register

Description

Long Space Disconnect This command determines the modem’s response to a

continuous spacing condition sent from the remote modem when it is online.

Y0 Disable

Y1 Enable

Reset and Load Active This command loads the settings of either the User 0

or User 1 permanent storage area into the Active memory locations.

Z0 Loads User 0 configuration options into

Active.

Z1 Loads User 1 configuration options into

Active.

Z or Z3 Performs a reset and loads storage area

specified by &Y into Active.

CD Control This command controls the Carrier Detect signal. &C0 Forced On

&C1 Follows standard RS232 operation

&C2 Wink when disconnected &C3 Follows DTR &C4 Simulated Control Carrier &C5 Disconnects when DTR turns Off

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Table 4-1. AT Command and S-Register Reference (8 of 27)

AT Command or S-Register

Description

DTR Action This command controls what actions are taken by the

modem based upon the Data Terminal Ready signal. &D0 Ignore true status, treat as always ON. &D1 Places modem into Online Command mode (the

call is not disconnected) when the DTR signal turns Off. An ATO returns the modem to Online mode.

&D2 Follows standard RS232 operation. When

DTR turns Off, the modem disconnects.

&D3 Reloads the contents of User 0 (ATY0) or

User 1 (ATY1) into the Active memory area when DTR turns Off. This is similar to the ATZ command (ATZ=ATZ3), but does not perform a complete power reset.

&D4 NOTE: This is used in specialized applications

and is not required by the typical user.

The local modem does not disconnect from the call until the local computer turns DTR Off regardless of how the remote modem disconnects the call. See S25 for more information.

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Table 4-1. AT Command and S-Register Reference (9 of 27)

AT Command or S-Register

Description

Select Factory Default and ETC Configuration Options This command reloads the factory configuration

options into the Active memory area and enables the ETC (Enhanced Throughput Cellular) protocol in your modem. Refer to Appendix D,

Cellular

Communications

, for more information on this

command. &F0 Loads factory configuration options into Active

memory.

&F5 Loads the ETC protocol. Use this setting when

the modem is attached to a cellular telephone through an RJ11 adapter box.

Not supported by Model 3760 and Model 3763, as these models do not support cellular operation.

&F6 Loads the ETC protocol. Use this setting when

the modem is connected directly to a normal telephone line, but communicates with remote modems that are attached to either a PSTN or a cellular telephone.

Not supported by Model 3760 and Model 3763, as these models do not support cellular operation.

V.22 bis Guard Tone This command determines whether the V.22 bis guard

tone is disabled, set to 550 Hz, or set to 1800 Hz.

This option is not used in North America but is mandatory in some countries outside of North America. See Table 4-3 for more information.

&G0 Disable &G1 550 Hz

&G2 1800 Hz

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Table 4-1. AT Command and S-Register Reference (10 of 27)

AT Command or S-Register

Description

Transmit Level This command sets the power level the modem uses

to transmit data over dial lines. The transmit output level can range from –10 dBm to –25 dBm. Note that values below –25 dBm are for future use.

NOTE:

The transmit level cannot be changed in some countries outside of North America. See Table 4-3 for more information.

The default setting is Permissive (–9 dBm).

&J0 Transmit Level

This command sets the modem transmit level to the maximum value in Permissive mode (–10 dBm).

NOTE: The transmit level cannot be changed in some countries outside of North America. See Table 4-3 for more information.

&J0

&Mn, &Q

Async/Sync Mode and Computer Dialer Type These commands both set the modem for either

asynchronous or synchronous operation and select the type of dialing method the modem uses, either AT commands or DTR dialing. Both the &M0 and &Q0 commands perform the same function.

&M0 or &Q0 Enables asynchronous operation

with AT command protocol dialing.

&Q4 Enables Hayes Autosync mode.

Not available in Model 3760 and Model 3763.

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Table 4-1. AT Command and S-Register Reference (11 of 27)

AT Command or S-Register

Description

RTS Action This command controls how the modem responds to

the Ready-to-Send (RTS) signal input from the computer.

&R0 Follows standard RS-232 operation

&R1 Ignore

&R2 Simulated Control Carrier

DSR Control This command controls the Data Set Ready (DSR)

signal output from the modem.

&S0 Forced ON

&S1 Follows standard RS-232 operation &S2 Wink when disconnected &S3 Follows DTR &S4 ON Early &S5 Delay until Data mode is entered

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Table 4-1. AT Command and S-Register Reference (12 of 27)

AT Command or S-Register

Description

Tests The &T command allows you to perform diagnostic

tests on your modem. The modem must be configured for Direct mode (\N1) before a test is started.(Note that commands &T1, &T6, &T7, and &T8 can also be performed in Buffer mode (\N0).) The test invoked by commands &T1–&T8 run until the &T0 command (Abort) is issued.

&T0 Stops any test in progress and displays results. &T1 Local Analog Loopback test. &T2 Pattern test. &T3 Local Digital Loopback test. &T4 Accepts Remote Digital Loopback test request. &T5 Denies Remote Digital Loopback test request. &T6 Remote Digital Loopback test. &T7 Remote Digital Loop back test with Pattern. &T8 Local Analog Loopback test with Pattern. &T9 Self-test.

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Table 4-1. AT Command and S-Register Reference (13 of 27)

AT Command or S-Register

Description

View Configuration Options and Phone Directory &V0 Displays current configuration options in Active

memory.

&V1 Displays configuration options stored in memory

area specified by &Y command.

&V2 Displays configuration options stored in

User 0.

&V3 Displays configuration options stored in

User 1.

&V4 Displays telephone numbers stored in directory

locations 1 and 2.

&V8 Displays modem status information for

troubleshooting.

&V1

Displays a continuous scroll of the View

command. (

= 0 for &V0, 1 for &V1, 2 for &V2,

3 for &V3, and 4 for &V4.)

Write (Save) Changes to Memory This command allows you to save modem settings to

one of two memory locations, User 0 or User 1. &W0 Saves current configuration options to

User 0.

&W1 Saves current configuration options to

User 1.

Transmit Clock Source This command is not supported by the modem. OK

appears if the command is issued.

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Table 4-1. AT Command and S-Register Reference (14 of 27)

AT Command or S-Register

Description

Load Configuration Options on Power-Up This command determines which set of configuration

options are loaded into Active memory when a modem power-up occurs.

&Y0 Loads configuration options from User 0.

&Y1 Loads configuration options from User 1.

&Zn=

Store Telephone Numbers Stores telephone number

into directory x

(1 and 2).

Maximum Frame Size This command determines the maximum frame (or

block) size used for V.42 or MNP 4–2 error control operation. For example, if the telephone connection is poor, this allows you to adjust the data’s block size and possibly improve the modem’s performance. Note that for V.42 operation, the modem has a maximum size of 128 characters.

\A0 64 characters per frame \A1 128 characters per frame \A2 192 characters per frame

\A3 256 characters per frame

\A4 32 characters per frame \A5 16 characters per frame

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Table 4-1. AT Command and S-Register Reference (15 of 27)

AT Command or S-Register

Description

Error Control Negotiate Buffer This command will control whether or not the modem

buffers (saves into a temporary waiting area) the data that it received from the remote modem during an interval in which the modem attempts to establish a connection using V.42 or MNP error control. Online changes to this option do not take effect until a disconnect occurs.

\C0 Disable

\C1 Enable \C2 Disable and Switch

CTS Control This command controls the Clear-to-Send (CTS)

signal sent to the computer.

\D0 Forced ON.

\D1 Follows standard RS-232 operation. \D2 Wink when disconnected. \D3 Follows state of DTR signal.

Modem-to-Modem Flow Control This command controls XON/XOFF flow control.

\G0 Disables

\G1 Enables

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Table 4-1. AT Command and S-Register Reference (16 of 27)

AT Command or S-Register

Description

Break Buffer Control, Send Break Control, Break Forces Escape

This command controls three different configuration options.

Break Buffer Control

determines if data stored in the modem’s buffer is saved or discarded when the computer issues a break sequence.

Send Break Contro

l determines what is sent from the modem first, data or a break, in the event that a break sequence is sent from the computer.

Break Forces Escape

determines whether or not the modem should enter Command mode when it receives a break sequence from the computer.

\K0 Discards data, sends break before data, and

enables break forces escape.

\K1 Discards data, sends break before data, and

disables break forces escape.

\K2 Keeps data, sends break before data, and

enables break forces escape.

\K3 Keeps data, sends break before data, and

disables break forces escape.

\K4 Keeps data, sends data before break, and

enables break forces escape.

\K5 Keeps data, sends data before break, and

disables break forces escape.

Page 57

4-18 Issue 3 April 1994

Table 4-1. AT Command and S-Register Reference (17 of 27)

AT Command or S-Register

Description

Error Control Mode This command determines the type of error control

used by the modem. \N0 Buffer mode \N1 Direct mode \N2 MNP or disconnect \N3 MNP or buffer \N4 LAPM or disconnect \N5 LAPM or buffer \N6 V.42/MNP or disconnect

\N7 V.42/MNP or buffer

Flow Control of Computer and Modem This command controls two different configuration

options. Flow Control of Computer determines how the modem controls the flow of data from the computer. Flow Control of Modem determines how the computer controls the flow of data from the modem.

Flow Control of Computer \Q0, \Q5, \Q6 Disable \Q1, \Q4 XON/XOFF \Q2, \Q3 CTS to computer

Flow Control of Modem \Q0, \Q2,\Q4 Disable \Q1, \Q5 XON/XOFF \Q3, \Q6 RTS to modem

Page 58

4-19

Issue 3 April 1994

Table 4-1. AT Command and S-Register Reference (18 of 27)

AT Command or S-Register

Description

No Data Disconnect Timer This command forces the modem to disconnect if no

data is transmitted or received within a specified time period.

\T0 Disable

\Tn Sets the No Data Disconnect Timer to value

which varies by country. See Table 4-2 for acceptable values.

XON/XOFF Passthrough Flow Control This command controls whether or not the modem

passes XON/XOFF characters from the locally attached computer through to the remote modem.

\X0 Disable (do not pass XON/XOFF)

\X1 Enable

Error Control Fallback This command allows you to change the ASCII value

of the error control fallback character

to an ASCII value from 0 to 127. The factory default is 13, an ASCII carriage return.

Modulation/Data Rate This command sets the modem’s modulation and

maximum data rate. %B300 V.21 or Bell 103 – max rate 300 bps %B1200 V.22, V.23, or Bell 212A –

max rate 1200 bps %B2400 V.22 bis – max rate 2400 bps %B4800 V.32 bis/V.32 – max rate 4800 bps %B7200 V.32 bis – max rate 7200 bps %B9600 V.32 bis/V.32 – max rate 9600 bps %B12000 V.32 bis – max rate 12,000 bps

%B14400 V.32 bis – max rate 14,400 bps

Page 59

4-20 Issue 3 April 1994

Table 4-1. AT Command and S-Register Reference (19 of 27)

AT Command or S-Register

Description

V.42 bis and MNP 5 Data Compression This command enables or disables the use of

V.42 bis and MNP Level 5 data compression. Online changes do not take effect until a disconnect occurs.

%C0 Disable

%C1 Enable

Disable Autobaud and Set DTE Rate This command enables or disables the autobaud

function and sets the data rate for the DTE interface. The changes made by this command are volatile and cannot be saved. When the modem is reset, autobaud is once again enabled.

%R Enable autobaud

%R300 Disables autobaud, sets DTE rate to 300 %R600 Disables autobaud, sets DTE rate to 600 %R1200 Disables autobaud, sets DTE rate to 1200 %R2400 Disables autobaud, sets DTE rate to 2400 %R4800 Disables autobaud, sets DTE rate to 4800 %R9600 Disables autobaud, sets DTE rate to 9600 %R12000 Disables autobaud, sets DTE rate to 12000 %R14400 Disables autobaud, sets DTE rate to 14400 %R19200 Disables autobaud, sets DTE rate to 19200 %R38400 Disables autobaud, sets DTE rate to 38400 %R57600 Disables autobaud, sets DTE rate to 57600

Page 60

4-21

Issue 3 April 1994

Table 4-1. AT Command and S-Register Reference (20 of 27)

AT Command or S-Register

Description

S0=

Auto-Answer Ring Number This register determines the number of rings the

modem will count before automatically answering a call.

Acceptable ring counts vary by country and are listed in Table 4-2.

A ring count of 0 will disable the auto answer feature.

S2=

AT Escape Character This register determines the ASCII value used for an

escape sequence (+++). Accepts an ASCII value from 0 to 127.

Factory setting is 43, an ASCII + character.

S3=

Carriage Return Character This register determines the ASCII value used as the

carriage return (Enter key). Accepts an ASCII value from 0 to127.

Factory setting is 13, an ASCII carriage return.

S4=

Line Feed Character This register determines the ASCII value used as the

line feed character. Accepts an ASCII value from 0 to 127.

Factory setting is 10, an ASCII line feed character.

S5=

Backspace Character This register determines the ASCII value used as the

backspace (Backspace key). Accepts an ASCII value from 0 to 127.

Factory setting is 08, an ASCII backspace character.

Page 61

4-22 Issue 3 April 1994

Table 4-1. AT Command and S-Register Reference (21 of 27)

AT Command or S-Register

Description

S6=

Blind Dial Pause Time This register determines how long (in seconds) the

modem waits, after going off-hook, before dialing a telephone number when the Dial Tone Detect configuration option (X command) is disabled.

NOTE: Blind dialing is not allowed in some countries outside of North America. Therefore, this command has no effect in those countries. See Table 4-3 for more information.

Acceptable values vary by country and are listed in Table 4-2.

S7=

No Answer Time-out This register determines how long (in seconds) an

originating modem waits before abandoning a call when no answer tone is received.

Acceptable values vary by country and are listed in Table 4-2.

S8=

“,” Pause Time for the Dial Modifier This register determines how long (in seconds) the

modem pauses when it encounters a comma (,) in the Dial command string.

Accepts a value from 0 to 255 seconds. Factory setting is 2 seconds.

S10=

No Carrier Disconnect This register determines how long (in tenths of

seconds) the modem allows the carrier signal to be Off before disconnecting the call.

The time period may be a entered in 0.1 second increments. Acceptable values vary by country and are listed in Table 4-2.

In those countries which allow a value of 255, the 255 value disables this feature.

Page 62

4-23

Issue 3 April 1994

Table 4-1. AT Command and S-Register Reference (22 of 27)

AT Command or S-Register

Description

S11=

DTMF Tone Timer (ON) This register controls the length of the DTMF (touch

tone) ON time. Acceptable values vary by country and are listed in

Table 4-2. If you enter a value lower than the minimum

acceptable value, that minimum value will be used.

S12=

Escape Guard Time This register sets the value (in 20-millisecond

increments) for the required pause before and after the escape sequence (+++) is issued.

Accepts a value from 0 to 255 in 20 millisecond increments. Factory setting is 50 (1 second/1000 msec).

S13=

DTMF Tone Timer (Off) This register controls the length of the DTMF (touch

tone) Off time, or interdigit delay. Acceptable values vary by country and are listed in

Table 4-2. If you enter a value lower than the minimum

acceptable value, that minimum value will be used.

S18=

Test Time-out This register sets the duration (in seconds) for any

modem test issued by the &T command. 0 = Disable Accepts a value from 1 to 255 seconds.

Factory setting is 0 seconds.

Page 63

4-24 Issue 3 April 1994

Table 4-1. AT Command and S-Register Reference (23 of 27)

AT Command or S-Register

Description

S25=

DTR Detection This register determines how much time elapses

between the modem detecting the loss of DTR and the modem responding to the loss of DTR. This setting is used to determine the DTR delay required by the &D4 command.

Accepts a value of 0 for Disable, or from 1 to 254 (in

0.1 second increments), or 255 for infinite delay.

S26=

RTS-to-CTS Delay This register sets the length of time (in 10-millisecond

increments) the modem waits after receiving the RTS signal before issuing the CTS signal to the computer.

Accepts a value from 0 to 255 in 10 millisecond increments. Factory setting is 0 milliseconds.

S41=

Dial-Line Rate This register determines which modem protocol, along

with its highest data rate, the modem uses for operation on dial lines. Online changes do not take effect until a disconnect occurs.

Also refer to the B command for related information. Accepts the following values: 0, 1 = 14,400 (V.32 bis) 2 = 12,000 (V.32 bis)

3 = 9600 (V.32 bis/V.32) 4 = 7200 (V.32 bis)

5 = 4800 (V.32 bis/V.32) 6 = 2400 (V.22 bis)

7 = 1200 (V.22) 8 = 1200 (212A)

10 = 0-300 (V.21) 11 = 0-300 (103J) 12 = 1200/75 (V.23) 13 = 75/1200(V.23)

Page 64

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Issue 3 April 1994

Table 4-1. AT Command and S-Register Reference (24 of 27)

AT Command or S-Register

Description

S43=

V.32 bis Train This register determines whether minimum or

maximum time durations are used during the V.32 bis/V.32 handshaking sequence for dial-line applications.

0 = Long

1 = Short

S49=

Buffer Disconnect Delay This register determines how long (in seconds) the

modem continues attempting to transmit data stored in its buffers after the modem is commanded to disconnect by a locally attached computer. This also applies to the modem’s receiving buffers when it is commanded to disconnect from a remote modem or computer.

0 = Disable Accepts a value from 0 to 255 seconds.

Factory setting is 10 seconds.

S76=

V.32 bis Autorate for Dial-Line Operation This register determines if the Autorate function is

used on dial lines when connected in V.32 bis mode. Autorate allows the modem to adjust line speed due to noise.

0 = Enable

1 = Disable 2 = Start at 4800 3 = Start at 9600

Page 65

4-26 Issue 3 April 1994

Table 4-1. AT Command and S-Register Reference (25 of 27)

AT Command or S-Register

Description

S78=

V.32 bis Automode for Dial-Line Operation If enabled, automode permits the modem to

automatically connect to a remote modem using any supported modulation scheme. If disabled, the modem only supports the modulation scheme selected by the S41 register (Dial-Line Rate).

0 = Enable

1 = Disable

S79=

V.17 Fax Disable This register allows you to enable or disable V.17 fax

(14,400 bps) functionality in your modem. This is necessary if your PC fax application does not correctly support V.17 operation.

0 = Enable

1 = Disable

S84=

AT Command Mode This register determines how the modem responds to

valid and invalid AT commands.

0 = Normal

1 = No_Error 2 = No_Strap_or_Error

CAUTION: If the modem is set for No_Strap_or_Error, you must use the S84 register (ATS84=0) in order to restore the modem to normal operation.

Page 66

4-27

Issue 3 April 1994

Table 4-1. AT Command and S-Register Reference (26 of 27)

AT Command or S-Register

Description

S85=

Fast Disconnect This command controls when the modem disconnects

after receiving a disconnect command from the locally attached computer. If enabled, the modem goes on-hook immediately. If disabled, the modem issues a cleardown sequence and, if so configured, a long space prior to disconnecting.

0 = Disable

1 = Enable

S89=

V.42 ARQ Window Size Increase This register allows the V.42 ARQ Window Size to be

set from 6 frames to 15 frames. This register is only valid when using V.42 bis data compression or V.42 error control.

0 = 6 frames (factory setting)

1 = 7 frames 2 = 8 frames 3 = 9 frames 4 = 10 frames 5 = 11 frames 6 = 12 frames 7 = 13 frames 8 = 14 frames 9 = 15 frames

NOTE: Values greater than 9 (15 frames) default to 9.

Page 67

4-28 Issue 3 April 1994

Table 4-1. AT Command and S-Register Reference (27 of 27)

AT Command or S-Register

Description

S90=

DTE Rate = VF Rate This register forces the computer’s (DTE) data rate to

be equal to the VF (telephone line) data rate. This register is not valid if the modem is configured for Direct mode (\N1).

0 = Disable

1 = Enable

S91=

Cellular Enhancements This is part of the ETC protocol. NOTE: This command is not supported in

Model 3760 and Model 3763, as these models do not support cellular operation.

0 = Disable

1 = Enable

Page 68

4-29

Issue 3 April 1994

Country Specific Information

The acceptable values for some AT commands and S-Registers depends on the country in which you are operating your modem. Table 4-2 contains information on the values to be used for those commands and S-Registers when operating your modem in the United States, Canada, and United Kingdom. Table 4-3 contains information on other features which are country dependent.

Table 4-2. Country Specific AT Command and S-Register Values

United States and Canada

United Kingdom

   

 

  

 

  

1–255 min. n.a. 1–255 min. n.a.

S0=

0–255 rings 1 ring 0–255 rings 1 ring

S6=

2–255 sec 2 sec. 4–7 sec 4 sec.

S7=

1–255 sec 45 sec. 59 sec. 59 sec.

S10=

1–255 (tenths of seconds)

2 sec. 1–255 (tenths

of seconds)

2 sec.

S11=

50–255 ms 70 ms 80 ms 80 ms

S13=

50–255 ms 70 ms 80 ms 80 ms

Page 69

4-30 Issue 3 April 1994

Table 4-3. Other Country-Specific Information

United States and Canada

United Kingdom

! Hook Flash dial modifier time period 0.5 seconds 80 ms Can transmit level be changed?

(see &I, &J0)

Yes No

Transmit Levels (Permissive) –9 dBm –10 dBm Is Blind dialing supported? (see X, S6) Yes Yes Is Guard Tone mandatory? (see &G) No Yes

Page 70

A-1

Issue 3 April 1994

Troubleshooting

This appendix points out basic problems that can occur when operating a KeepInTouch Card modem. It begins with simple actions and progresses to more detailed reasons as to why your modem may not operate. Use the hints provided in Tables A-1 through A-5 to troubleshoot problems you may encounter.

Your modem may have been shipped with an Installation Utilities diskette. If you have this diskette, there is a diagnostics program which may assist you in troubleshooting problems with your modem. Refer to the help text files on the diskette for more information on using the diagnostics program.

NOTE:

If your modem is included as part of your PC purchase, your PC supplier may have loaded the files from the utilities diskette onto your hard drive. If you did not receive a copy of the diskette, check to see if the files are already on your hard drive. Note, however, that not all PC suppliers provide this diskette or files on the hard drive.

You may have access to a Bulletin Board System (BBS) if there is a BBS telephone number on your warranty card. You may use the BBS to view the most recent help text files, and to obtain the latest releases of the utilities programs.

If you are experiencing problems while configuring your modem to use it for the first time, use the Install program on the utilities diskette to evaluate how the modem has been configured on your PC.

If you have successfully used the modem in your PC on previous occasions and are now having trouble, use the Diagnostic program to check for modem hardware problems.

Page 71

A-2 Issue 3 April 1994

If you suspect that the firmware on your modem has been corrupted, you may want to use the Upgrade program. The Upgrade program will install new firmware into your modem from the Bulletin Board System.

NOTE: Model 3760 and Model 3763

modems are not upgradeable.

Table A-1. Modem Health Symptom

Action

Modem does not respond

Make sure the modem is properly seated in the PCMCIA slot.

Make sure the modem is not in Low-Power (Sleep) mode.

Make sure the PC is PCMCIA compliant. Make sure the PC is turned ON.

Page 72

A-3

Issue 3 April 1994

Table A-2 isolates problems to the connection between your modem and computer. It focuses on the modem not accepting AT commands from the computer.

Table A-2. Modem — Computer Connection Symptom

Action

Modem does not accept or echo back AT commands

Verify that the Configuration Program has configured the modem for the correct communications port. Refer to Chapter 2,

Installation

Make sure that the communications software has the correct COM port selected.

Make sure that all AT commands are terminated with a carriage return.

Use your communications software to verify:

that the computer has a valid character format. Valid format consists of 8 data bits with no parity or 7 data bits with even, odd, mark or space parity.

that the computer’s nominal data rate (57,600 bps–300 bps) is supported by the modem.

Issue the ATE1 command to make sure that characters can be echoed back to your monitor. An OK response should appear. Then, enter an AT and carriage return to make sure characters display to your monitor.

Page 73

A-4 Issue 3 April 1994

Table A-3 provides solutions to problems that can occur when your modem tries to answer or originate a call.

Table A-3. Modem — Telephone Line Connection (1 of 5)

Action

Symptom

CONNECTION PROBLEMS — Dial Environments in Answer mode

Modem does not go off-hook and answer an incoming call

Make sure the modem and PCMCIA socket are configured for modem operation.

Make sure the telephone cord is connected to the telephone line connector.

Make sure the telephone line connector is properly connected to the modem.

Attach a standard telephone to the wall telephone outlet and verify that it rings during incoming calls.

Verify that the Auto-Answer Ring Count configuration option (S-Register 0) is set to a value other than 0 (disable).

Verify that the computer is providing DTR to the modem. Set the modem’s &D command (DTR Action configuration option) to Ignore (&D0).

Page 74

A-5

Issue 3 April 1994

Table A-3. Modem — Telephone Line Connection (2 of 5)

Action

Symptom

CONNECTION PROBLEMS — Dial Environments in Answer mode

Modem goes off-hook, answers, but does not connect

Verify that the modem is optioned for Automode enable (S78=0). Verify that the originating modem supports your modem’s modulation schemes. The modem recognizes CCITT V.32 bis, V.32, V.22 bis, V.22, V.21, Bell 212A, Bell 103J, and V.23. Note that the modem does not support other vendors’ proprietary modulation schemes.

Determine the originating modem’s modulation scheme, and then use the S41 register to force your modem to operate at the same modulation scheme as the originating modem.

Perform a Local Analog Loopback test (&T1) and verify that data entered at the computer is echoed back to the computer.

Page 75

A-6 Issue 3 April 1994

Table A-3. Modem — Telephone Line Connection (3 of 5)

Action

Symptom

CONNECTION PROBLEMS — Dial Environments in Originate mode

Modem does not go off-hook and begin dialing

Make sure the modem and PCMCIA socket are configured for modem operation.

Make sure the telephone line connector is connected to the modem. Make sure you are using a supported telephone line connector.

If using AT Dialing, refer to the Table A-2, Modem — Computer Connection.

If using DTR Dialing, verify that the telephone number stored in directory location 1 is correct, and verify that the computer is raising DTR from Off to ON to initiate a dial.

If the modem does not break dial tone, check the settings of S11 and S13.

Refer to the

Making a Call with Your Modem

section in Chapter 3,

Using Y our Modem,

to verify that you are using the proper command format.

Page 76

A-7

Issue 3 April 1994

Table A-3. Modem — Telephone Line Connection (4 of 5)

Action

Symptom

CONNECTION PROBLEMS — Dial Environments in Originate mode

Modem dials but does not connect

If the modem is operating behind a PBX, determine if a 9 and comma are needed before the telephone number.

Verify whether Tone or Pulse dialing is needed. Verify if one modem is configured for error

control/disconnect (\N2, \N4, \N6, \N7) and the other modem is configured for no error control. Try calling in Buffer mode (\N0).

If both modems use V.32 bis or V.32 modulation, set the modem’s V.32 bis Train configuration option (S-Register 43) to Long (0).

Intermittent disconnects, high error rates, or excessive retransmissions

Use the &T7 command to perform a remote digital loopback test with pattern test.

Perform a self-test using the AT&T9 command. Perform a local analog loopback with a Pattern

test. If the modem passes the above tests and a

problem still exists, then the problem is likely not with your modem.

High error rates occur when running a local loopback or self-test

Incoming rings can cause data errors during a loopback test. Abort the test, disconnect the modular telephone cord, and restart the test.

Page 77

A-8 Issue 3 April 1994

Table A-3. Modem — Telephone Line Connection (5 of 5)

Action

Symptom

CONNECTION PROBLEMS — Dial Environments in Originate mode

Modem does not receive a dial tone and sends a NO DIALTONE message to your computer

Make sure the telephone cord is connected to the telephone line connector.

Attach a telephone directly to the wall outlet to verify that a dial tone exists.

Disable the Dial Tone Detect configuration option (X0, X1, and X3) and dial the telephone number. This will force the modem to dial without detecting a dial tone on the telephone line. This type of dialing is known as Blind Dialing. NOTE: Blind Dialing is not supported in some countries outside of North America. Refer to Table 4-3 in Chapter 4 for more information.

Modem establishes and disconnects a call

You may have a poor telephone line connection. Try dialing again.

The remote modem may have encountered an error control disconnect, where the modem is configured to establish a call using error correction. If the modems cannot negotiate error control, then a disconnect occurs.

Your telephone may have Call Waiting enabled. Refer to your local phone book for procedures to disable this feature.

Perform a Local Analog Loopback (&T1) test to check the modem’s hardware operation.

Page 78

A-9

Issue 3 April 1994

If the modems are having trouble passing data after connecting, Table A-4 lists several recommendations and solutions to this problem.

Table A-4. Online Operation Symptom

Action

Data is scrambled

Use your communications software to verify that the character format (data bits, parity, and stop bits) is set to the same value in both modems.

Missing data during a transfer

Verify that you are using the same method of flow control for both the modem and the computer.

If using XON/XOFF flow control, verify that the modem’s parity matches the computer’s parity.

The KeepInTouch Card modem contains a 16550A compatible UART which is useful for high-speed data transfers. Make sure that your communications software supports a 16550A UART and high data rates.

Garbage characters appear on your monitor when your modem connects to another modem

Your modem is not using error control, and the other modem is using error control. The garbage characters are part of the error control handshaking sequence.

Modem hangs up, but does not indicate a hang up

Make sure that the &D2 command (Standard RS-232 operation) is set.

Make sure that the &C1 command is set so that when the CD signal turns Off, the modem hangs up.

Page 79

A-10 Issue 3 April 1994

Table A-5 focuses on problems you may experience during fax operation.

Table A-5. Fax Operation Symptom

Action

Modem cannot send or receive a fax

Make sure the modem and PCMCIA socket are configured for modem operation.

Disable V.17 fax by using the S79 command. Refer to the

Fax Operation

section of Chapter 3 or your fax application software user’s guide for more information.

Page 80

B-1

Issue 3 April 1994

 

Table B-1 lists technical specifications for the KeepInTouch Card modem.

Table B-1. Technical Specifications (1 of 3) Specifications

Description

APPROVALS

Model 3760

FCC Part 15 FCC Part 68

REN DOC CS-03

UL CSA

See modem label for certification number See modem label for registration number

0.4B See modem label for certification number Listed to UL 1950 Certified to CSA C22.2 No. 950

Model 3762

FCC Part 15 FCC Part 68

REN DOC CS-03

UL CSA

See modem label for certification number See modem label for registration number

0.4B See modem label for certification number Listed to UL 1950 Certified to CSA C22.2 No. 950

Page 81

B-2 Issue 3 April 1994

Table B-1. Technical Specifications (2 of 3)

APPROVALS (cont.)

Model 3763

This product is intended for use only outside of North America. For approvals, refer to information printed on the modular telephone connector.

Model 3764

This product is intended for use only outside of North America. For approvals, refer to information printed on the modular telephone connector.

COMPATIBILITY Dial-Line Modulations

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

Fax Modulations CCITT V.29 (9600, 7200 bps — Group 3 fax) CCITT V.27 ter (4800, 2400 bps) CCITT V.17

ENVIRONMENT

Operating Temperature Relative Humidity Shock and Vibration

Storage Temperature

32°F (0°C) to 122°F (50°C) 5% to 90% (noncondensing) Withstands normal shipping and handling –ā4°F (–20°C) to 158°F (70°C)

Page 82

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Issue 3 April 1994

Table B-1. Technical Specifications (3 of 3)

INTERFACES

Card Modem

Telephone Line Connector

68-pin PCMCIA Type II connector 25-pin card/telephone line interface connector

25-pin telephone line interface connector/card interface connector RJ11C connector (USA) CA11A connector (Canada) An approved connector (for each supported country outside of North America)

DIMENSIONS

Height Width Length

0.196 inches (5.0 mm)

2.126 inches (54.0 mm)

3.370 inches (85.6 mm)

TRANSMIT LEVEL

Dial Line

Permissive. Values vary by country. See Table 4-3 for more information.

DATA RATES

Dial Line

Computer Data Rates

14,400, 12,000, 9600, 7200, 4800, 2400, 1200, or 300–0 bps.

57,600, 38,400, 19,200, 14,400, 9600, 7200, 4800, 2400, 1200, 300 bps.

ERROR CONTROL CCITT V.42

MNP 4–2

DATA COMPRESSION

CCITT V.42 bis MNP 5

CELLULAR Enhanced Throughput Cellular (ETC)

(not available in Model 3760 and Model 3763)

Page 83

C-1

Issue 3 April 1994

Result Codes

 

Result codes are informational messages sent from the modem and displayed on your monitor. These messages are the modem’s response to commands you issue to the modem. They can inform you of the status of a call (Ring, No Answer), or whether or not a command is valid (OK, Error), or whether or not the modem has connected using error control (Connect 14400 V42/MNP/Bfr).

The KeepInTouch Card modem ships from the factory configured to use the word format. If your computer requires that you use the numbers format instead, refer to the Q

, Vn,

and X

commands in Chapter 4.

Table C-1 describes the result codes supported by the KeepInTouch Card modem.

Table C-1. Result Codes (1 of 3) Number 1,

Number 2

Word Description

NOTE: The following result codes are enabled by the X0–X7 commands.

0,0 OK Command executed 1,1 CONNECT Modem connected to line 2,2 RING Modem receiving a ring voltage from

the VF line

3,3 NO

CARRIER

Modem lost carrier signal, does not detect carrier signal, or does not detect answer tone

4,4 ERROR Invalid command

Page 84

C-2 Issue 3 April 1994

Table C-1. Result Codes (2 of 3) Number 1,

Number 2

DescriptionWord

NOTE: The following result codes are enabled by the X1–X7 commands.

5,5 CONNECT

1200

Connection at 1200 bps

6,6 NO

DIALTONE

No dial tone detected

7,7 BUSY Busy or trunk busy signal detected 8,8 NO ANSWER No “quiet” answer @ 9,9 WRONG

CALL

Voice detected at the called number.

(available in Europe only)

10,10 CONNECT

2400

Connection at 2400 bps

11,11 CONNECT

4800

Connection at 4800 bps

12,12 CONNECT

9600

Connection at 9600 bps

13,16 CONNECT

12000

Connection at 12,000 bps

14,13 CONNECT

14400

Connection at 14,400 bps

16,15 CONNECT

7200

Connection at 7200 bps

19,1 CONNECT

300

Connection at 300 bps

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Table C-1. Result Codes (3 of 3) Number 1,

Number 2

DescriptionWord

NOTE: The following result codes are enabled by the X5 command (REL suffix) or the X6 command (V.42, V.42 bis, MNP 2, MNP3, MNP4, or the MNP 5 suffix).

20,10 CONNECT

2400/REL

Connection at 2400 bps with error control

21,11 CONNECT

4800/REL

Connection at 4800 bps with error control

22,12 CONNECT

9600/REL

Connection at 9600 bps with error control

23,16 CONNECT

12000/REL

Connection at 12,000 bps with error control

24,13 CONNECT

14400/REL

Connection at 14,400 bps with error control

26,15 CONNECT

7200/REL

Connection at 7200 bps with error control

27,5 CONNECT

1200/REL

Connection at 1200 bps with error control

40,40 FORBIDDEN Forbidden number called. Forbidden

numbers are those at which a voice has been detected

(available in

Europe only).

41,41 DELAYED

Call was not placed because a delay is still in effect for xx minutes. Try again after xx minutes

(available in

Europe and Japan only).

NOTE: The following result codes are enabled by the X7 command (Computer data rate suffix).

15,14 CONNECT

19200

Connection at 19,200 bps

28,28 CONNECT

38400

Connection at 38,400 bps

30,30 CONNECT

57600

Connection at 57,600 bps

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 

Connecting your Modem for Cellular Operation

Model 3762 and Model 3764 KeepInTouch Card modems support communication over cellular telephone channels. There are two methods for connecting your modem to a cellular telephone.

The first method is known as Direct Connect. This method allows you to connect the modem directly to the cellular telephone by using a special cable, known as a Cellular Direct Connect Cable.

The second method of connection requires an external device, such as an RJ11 adapter box, which generates call progress tones to the modem.

Direct connection is the preferred method for connecting your modem to a cellular telephone, as it offers superior performance over the RJ11 adapter box. Direct connection is supported in Model 3762 and Model 3764 KeepInTouch Card modems.

For information on which models of cellular telephones may be directly connected to your modem, as well as cable ordering information, refer to the help text file “cellular.txt.”

The “cellular.txt” help text file also contains the most up-to-date information on configuring your modem for cellular operation and obtaining the best performance over a cellular network.

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NOTE:

For information on accessing “cellular.txt” and other help text files, refer to the section

Where to Find Additional

Information

in Chapter 1,

Introduction.

Direct Connection to a Cellular Telephone

To connect the modem to a cellular telephone with a Cellular Direct Connect Cable, first install the modem in your PC, as described in Chapter 2,

Installation

. Then use the following procedure and Figure 2-1 (in Chapter 2) to connect your modem directly to a cellular telephone:

1. Plug the cellular cable’s 9-pin connector into the modem’s 9-pin rear edge connector. The connector’s slot must face up.

2. Attach the other end of the cellular cable to the cellular telephone.

3. You may need to upgrade the firmware on your modem to support your specific model of cellular telephone. For more information, refer to the “cellular.txt” help text file.

Connection to a Cellular Telephone through an RJ11 Adapter Box

To purchase an adapter box, contact your cellular telephone supplier. Make sure you specify the type of telephone you have since several types of adapters are available.

To connect the modem to a cellular telephone through an RJ11 adapter box, first install the modem in your PC, as described in Chapter 2,

Installation

. After installing the modem in your PC

follow the instructions which are supplied with the RJ11 adapter box.

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Configuring Your Modem for Cellular Operation

You must configure your modem for cellular operation. If the modem is on the

cellular side

of the connection (connected to a cellular telephone), there are two methods for configuring the modem. Choose a method based on the type of connection you have selected. If you are using Direct Connect, configure the modem to use the automatic cellular setup feature by using the

command. If you are using an RJ11 adapter box, use the

&F5 command. If the modem connects to a normal

land-line

public switched telephone network (PSTN), but communicates to a remote modem that can be attached to either a cellular or PSTN telephone, use the &F6 command.

The following sections describe how to configure your modem using these three different methods.

Automatic Cellular Setup for Direct Connection on the Cellular Side

Use this feature when the modem is connected to a cellular telephone by a Cellular Direct Connect Cable. Your modem can be configured to automatically switch to a cellular configuration whenever it detects the presence of a directly connected cellular telephone. When the cellular direct connection is broken and replaced by a normal telephone line connection, the modem will switch back to a land-line configuration. This feature enables you to easily switch between cellular and land-line telephones without resetting individual modem configuration parameters.

To use this feature, Automatic Cellular Setup must be enabled by using the C0 command.

When the Automatic Cellular Setup feature is enabled, and the modem detects a direct connection to a cellular telephone, the modem automatically changes specific configuration options for cellular operation as shown in Table D-1.

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Table D-1. Automatic Cellular Setup Configuration Parameters Configuration Option

Automatic Cellular Setting

AT Command Equivalent

Error Control Mode LAPM or disconnect \N4 Maximum Frame Size 32 characters/frame \A4 No Carrier Disconnect 10 seconds S10=100 V.32 bis Train Short Train S43=1 V.32 bis Autorate Start at 9600 S76=3 V.42 ARQ Window Size Window size of 15 S89=9 Cellular Enhancements Enable S91=1

When the modem detects a normal land-line telephone connection, the parameters in Table D-1 automatically switch back to their non-cellular settings.

&F5 Cellular Setup for RJ11 Adapter Connection on the Cellular Side

Use the &F5 command to configure your modem for cellular operation when the modem is attached to a cellular telephone through an RJ11 adapter box. This command restores the modem to its factory default configuration (as if &F0 had been entered) and then changes specific configuration options for cellular operation as shown in Table D-2.

Table D-2. &F5 Cellular Setup Configuration Parameters (1 of 2)

Configuration Option

&F5 Cellular Setting

AT Command Equivalent

Error Control Mode LAPM or disconnect \N4 Maximum Frame Size 32 characters/frame \A4 No Carrier Disconnect 10 seconds S10=100 V.32 bis Autorate Start at 9600 S76=3 V.42 ARQ Window Size Window size of 15 S89=9

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Table D-2. &F5 Cellular Setup Configuration Parameters (2 of 2)

Configuration Option

AT Command Equivalent

&F5 Cellular Setting

Cellular Enhancements Enable S91=1 Transmit Level

(in North America only)

–16 dBm &I16

No Answer Time-out 120 seconds S7=120 V.32 bis Train Short train S43=1

NOTE:

In North America, some of the hardware components of your cellular telephone setup, such as the RJ11 adapter box, may require you to make adjustments to your modem’s dial transmit level (&I command).

If you are using a Spectrum Cellular AXCELLt box, then issue the &I10 (–10 dBm) command after the &F5 command to adjust the modem’s dial transmit level. For example:

TYPE:

AT&F5&I10&W

PRESS:

Enter

&F6 Cellular Setup for Connection on the PSTN Side

If your modem connects directly to normal land lines, but communicates to a remote modem that may be attached to either a cellular telephone or normal telephone line, configure the modem using the &F6 command. This command restores the modem to its factory default configuration (as if &F0 had been entered) and then changes specific configuration options for cellular operation as shown in Table D-3.

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Table D-3. &F6 Cellular Setup Configuration Parameters Configuration Option

&F6 Cellular Setting

AT Command Equivalent

Error Control Mode LAPM or disconnect \N4 Transmit Level

(in North America only)

–18 dBm &I18

No Answer Time-out 120 seconds S7=120 No Carrier Disconnect 10 seconds S10=100 V.32 bis Train Short train S43=1 V.42 ARQ Window Size Window size of 15 S89=9 Cellular Enhancements Enable S91=1

ETC Protocol and Interworking with Non-ETC Modems

To ensure successful data transfer over a cellular channel, your modem supports the ETC (Enhanced Throughput Cellular) protocol which improves data communications over cellular telephone channels. The ETC protocol provides a number of enhancements to both the V.42 error control protocol and the V.32 bis modem protocol. These enhancements increase modem performance and reliability when communicating data over a cellular telephone channel.

Placing a Call Through a Public Switched Telephone Network (PSTN)

For best operation, it is recommended that the land-line modem also support the ETC protocol. When this is not possible, adequate operation can usually be obtained as long as the land-line modem supports the V.42 error control protocol. The following describes changes to both the mobile site and land-line modem that can improve modem performance.

If it is known that the remote land-line modem is not an ETC modem, but that it does support either

V.32 bis or

V.32

protocol, then configure the mobile site modem to

operate at 4800 bps by using the %B4800 command.

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If it is known that the remote land-line modem is not an ETC modem, but that it does support

V.22 bis

protocol, then configure the mobile site modem to operate at 1200 bps by using the %B1200 command.

If possible, make sure that the remote land-line modem is at least configured for Reliable mode (connect using V.42 error control, MNP 4–2, or disconnect). Better performance can be achieved if the modem is configured for V.42 (LAPM) only mode.

For both the mobile site and land-line modems, set the No Carrier Disconnect Timer setting to 10 seconds. For most modems, this command is ATS10=10.

Placing a Call Through a Modem Pool

Many cellular carriers now offer Cellular Modem Pools. These Cellular Modem Pools are highly recommended, as they allow your ETC modem to connect to virtually any modem in the world. Contact your local cellular service provider for information on the availability of Modem Pools in your area.

To place a call to a remote site through a Modem Pool, add a ∗3282 command to the ATDT command prior to the dial string:

TYPE:

ATDT∗3282

where:

n is the telephone number

PRESS:

Enter

The 3282 number is easily remembered, as it spells out the word

DATA

on your telephone keypad.

Fax over Cellular

The following provides information when sending a fax over a cellular network:

If you use the &F5 command for cellular setup (instead of Automatic Cellular Setup via the C command), then make sure the PC fax program is limited to 4800 bps operation for best results. The C command sets this limit automatically.

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The standard fax initialization string that is used for PSTN fax operation can also be used for cellular fax operation, with one addition: when operating through a Motorolar Cellular Connection RJ11 adapter box, adjust the transmit level to –16 dBm (by adding &I16 to the initialization string).

(NOTE: The &I command is only available in selected countries. Refer to Table 4-3 for more information.)

If you are using a software application capable of transmitting both data and fax, use either the C command for Automatic Cellular Setup (for Direct Connect) or the &F5 command (for RJ11 adapters) if you plan to transmit both data and fax.

Tips for Successful Cellular Operation

The following section lists several issues to be aware of when using cellular channels for data communications:

If possible, avoid peak cellular transmission hours. Heavy telephone traffic during this period (for example, rush hour and lunch hour) can impair network conditions and affect data transfers. Cellular rates are also lower during off-peak hours.

When using a hand-held cellular telephone (a 600 milliwatt telephone), make sure the antenna is extended and that the telephone rests in a vertical position. Commercially available leather briefcases that hold the computer and telephone help facilitate this.

When using a portable cellular telephone (a 3 watt telephone), make sure that the telephone is attached to an external antenna.

Cellular communications within a building may not be possible due to the number of obstructions within a building. If you are having problems while trying to transfer or receive data from inside a building, try locating the cellular telephone near a window for better cellular reception.

Performance when stationary is usually better than when moving. If you encounter problems, stop the vehicle and place the call from a stationary position

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Z modem protocol is recommended for file transfers. Most software packages today support this protocol. Z-modem is a efficient protocol with low overhead, and it allows a dropped call to resume the file transfer at the point of disconnect.

If you are using an RJ11 adapter box, make sure that it has a fresh battery installed.

Although you cannot guarantee that the modem you connect to supports ETC, the remote modem should use V.42 error correction at a minimum. (If this is not possible, then the remote modem should use Reliable mode.) In addition, the remote modem should also use similar configuration settings as described earlier.

Overview of Cellular Communication

Cellular communication uses radio waves to transmit a call (your signal) between the cellular telephone and the cell’s transmission tower. A cellular network consists of adjacent geographic regions known as cells. Within each cell, there is a transmission tower that communicates directly to both the cellular telephone and a Mobile Telephone Switching Office (MTSO).

The tower and MTSO constantly monitor the location and signal power of your call. When your call becomes too weak to be handled by the tower in that cell, either due to distance from the tower or high activity on the network, it is “handed off” to another cell. The tower uses radio waves to interface with the cellular telephone, and the MTSO uses traditional land lines to interface between the transmission tower and ultimately the remote caller.

The following is a brief list of some of the interference your signal is subject to when using cellular channels:

Man-made and natural structures, such as buildings, tunnels, trees, hills, and valleys can block your signal.

Your proximity to the cell’s transmission tower can affect your signal’s strength.

Heavy phone traffic, especially during peak periods such as rush hour and lunch hour, and contention for an

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available frequency can determine if your data call connects.

Hand-offs, the passing of your call from one cell to another, can cause delays which result in lost data or disconnection. Note that a hand-off can occur while you are stationary, especially during peak periods.

Multipath, a type of interference that is caused by your signal’s reflection from buildings and passing vehicles, can affect your data transmission. Multipath can occur while you are stationary or moving.

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Glossary

Active

A nonvolatile configuration area containing the most recently saved configuration options. Any changes made to configuration options can be saved by issuing an AT&W0 command.

analog signal

A type of signal used to transmit data over telephone lines.

Answer mode

The modem is in a state where it is ready to receive an incoming call. For example, an ATA (Answer) command has been issued to place the modem into online answer mode. The modem has been forced off-hook and is generating an answer tone,

beginning the handshaking process with the calling modem.

Async Dial

A factory preset configuration area containing the configuration options most often used in asynchronous dial networks.

asynchronous transmission

A data transmission that is synchronized by a transmission start bit at the beginning of a character (five to eight bits) and one or more stop bits at the end.

AT command set

A group of commands, issued from an asynchronous computer, that allows control of the modem while in Command mode. All commands must begin with the characters AT and end with a carriage return.

AT command string

This consists of several AT commands issued at once. The string is preceded with an AT prefix.

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AT prefix

A prefix issued before every AT command (except A/ and +++) which identifies the computer’s data rate, parity, and character length.

autobaud

Modem automatically determines the asynchronous computer data rate when using AT commands.

Bell 103J

An AT&T Bell standard for 300 bps data transmission.

Bell 212A

An AT&T Bell standard for 1200 bps data transmission.

bps

Bits per second. Indicates the speed at which data is transmitted between devices.

buffer

A storage area used to compensate for differences in data flow rate when transmitting data from one device to another.

Carrier Detect. A signal between the local and remote ends of a network indicating energy exists on the transmission circuit. Associated with Pin 8 on an EIA RS-232 interface.

chassis ground

Pin 1 of an EIA RS-232 interface.

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command line

Contains the command(s) instructing the modem to perform a function. Command lines begin with the AT prefix, and are executed when you press the Enter key.

Command mode

One of two modem operating modes. When in Command mode, the modem accepts commands instead of transmitting or receiving data.

COM port

Communications port. A computer’s serial communications port used to transmit to and receive data from a modem. The modem connects directly to this port.

communications software

Software installed on a computer that controls the modem.

configuration option

Modem software that sets specific operating parameters for the modem. Sometimes referred to as straps.

CTS

Clear-to-Send. A signal, sent to the computer via Pin 5 of an EIA RS-232 interface, indicating that the modem is ready for the computer to transmit data.

data compression

The elimination of empty fields, redundancies, and gaps in order to reduce storage capacity needs and the amount of data to be transmitted. Anything that is eliminated is restored after the data is received.

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Data mode

One of two operating modes. When in Data mode, the modem considers any input from the computer to be data and transmits it across the telephone line to the remote modem.

DCE

Data Communications Equipment. A modem.

dial command modifiers

A modifier used in the dial string that instructs the modem how to process a dialed telephone number.

dial string

A series of characters that consists of numbers and modifiers used to dial a telephone number.

digital signal

A signal used to transfer data between a locally attached computer and modem.

download

A file transfer in which a file is received from another computer.

DSR

Data Set Ready. A signal from the modem to the computer, sent via Pin 6 of an EIA RS-232 interface, that indicates the modem is turned ON and connected to the computer.

DTE

Data Terminal Equipment. The equipment, such as computers and printers, that provides or creates data.

DTR

Data Terminal Ready. A signal from the computer to the modem, sent via Pin 20 of an EIA RS-232 interface, that indicates the computer is turned ON and connected to the modem.

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EIA-RS232

An Electronic Industries Association’s standard defining the 25-position interface between data terminal equipment and data communications equipment.

EIA/TIA 578

An Electronic Industries Association’s standard fax modems.

error control

A method used by the modem to detect and correct data transmission errors.

escape sequence

Default setting is +++. This sequence lets you switch your modem from Data mode to Command mode.

extended result codes

An asynchronous message (in either numbers or words) that includes VF data rate and error control information the modem sends to the computer after executing or trying to execute a command.

factory defaults

A predetermined set of configuration options containing the optimum settings for operation on asynchronous dial networks.

fax software

Software installed on a computer that allows a modem to send and receive facsimiles from another fax modem or fax machine.