Paradyne KeepInTouch 3760 User manual

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3760-A2-GB91-20
Issue 3
April 1994
KeepInTouch Card Modem
Models 3760, 3762, 3763,
and 3764
User’s Guide
P a
r
a dyn e

AIssue 3 April 1994
  
COPYRIGHT E 1994 AT&T Paradyne Corporation*
All Rights Reserved
Printed in U.S.A.
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.

CIssue 3 April 1994
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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Issue 3 April 1994
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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Issue 3 April 1994
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:
G Reorient or relocate the receiving antenna
G Increase the separation between the equipment and
receiver
G Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected
G 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.

GIssue 3 April 1994
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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Issue 3 April 1994
!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 [phone].
United Kingdom
Facilities
This apparatus has been approved for the use of the following
facilities:
G Modem
G Automatic call initiation
G Detection of initial proceed indication
G Auto Answering
G Operation in the absence of proceed indication
G Auto Clear from the call originating end
G Storage of telephone numbers for retrieval by a
predetermined code
G 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.

IIssue 3 April 1994
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:
G 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.
G 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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Issue 3 April 1994
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
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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Issue 3 April 1994
Contents
1Introduction
G Welcome to the World of Portable, High-Speed Data
Communications! 1-1
G KeepInTouch Card Modem Package 1-2
Supplied Equipment 1-2
Required Equipment 1-4
G Where to Find Additional Information 1-5
2Installation
G 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
G Configuring Your PC to Use the
KeepInTouch Card Modem 2-5
G Fax Application Software 2-7
G Using Hayes AutoSync 2-7
3Using Your Modem
G Using AT Commands 3-1
G Making a Call with Your Modem 3-3
G Disconnecting a Call 3-4
G Manually Answering a Call 3-6
G Viewing, Selecting, and Saving Modem Settings 3-6
G Operating Modes (Command and Data) 3-7
Switching Between Data Mode and Online
Command Mode Using the Escape
Sequence 3-7
G Changing Modem Modulations and Modem Speed 3-8

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Contents
G An Overview of File Transfers and Fax Operation 3-9
File Transfers 3-9
Fax Operation 3-10
G Using Cellular Channels 3-10
4AT Command Set and S-Registers
G AT Commands and S-Registers 4-1
G Country Specific Information 4-29
ATroubleshooting A-1
BTechnical Specifications B-1
CResult Codes C-1
DCellular Communications
G 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
G 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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Issue 3 April 1994
Contents
G 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
G Fax over Cellular D-7
G Tips for Successful Cellular Operation D-8
G Overview of Cellular Communication D-9
GL Glossary GL-1
IN Index IN-1

iv Issue 3 April 1994
Figures
1Introduction
G 1-1 Supplied Equipment 1-3
2Installation
G 2-1 Model 3760 and Model 3762
Modem Installation 2-2
G 2-2 Model 3763 and Model 3764
Modem Installation 2-4

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Issue 3 April 1994
Tables
4AT Command Set and S-Registers
G 4-1 AT Command and S-Register Reference 4-2
G 4-2 Country Specific AT Command and
S-Register Values 4-29
G 4-3 Other Country-Specific Information 4-30
ATroubleshooting
G A-1 Modem Health A-2
G A-2 Modem — Computer Connection A-3
G A-3 Modem — Telephone Line Connection A-4
G A-4 Online Operation A-9
G A-5 Fax Operation A-10
BTechnical Specifications
G B-1 Technical Specifications B-1
CResult Codes
G C-1 Result Codes C-1
DCellular Communications
G D-1 Automatic Cellular Setup
Configuration Parameters D-4
G D-2 &F5 Cellular Setup Configuration Parameters D-4
G D-3 &F6 Cellular Setup Configuration Parameters D-6

1-1
Issue 3 April 1994
Introduction
1
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 MNP t Levels 4–2 error control. To increase
effective data throughput and reduce the duration of calls, the

1-2 Issue 3 April 1994
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
2fax 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 ETC t (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 Hayes r 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:
G One KeepInTouch Card modem
G One user’s guide
G (For Model 3760 and Model 3762 only:) A 2-pin modular
telephone cord.

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Issue 3 April 1994
G (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:
G 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 AT t 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.
G Diskettes and user’s guides for software which allows
you to send data and fax transmissions.
G A technical information update sheet (if necessary).
Figure 1-1. Supplied Equipment