Zhone 3825Plus User`s guide

COMSPHERE
3825PLUS MODEM
USER’S GUIDE
Document No. 3825-A2-GB30-41
February 2002
COMSPHERE 3825Plus Modem
COMSPHERE
3825Plus Modem
User’s Guide
3825-A2-GB30-41
6th Edition (February 2002)
Changes and enhancements to the product and to the information herein will be documented and issued as a new release or a limited
revision of this manual.
The 3825Plus modem connects to the Public Switched Telephone Network (PSTN) using the Universal Service Order Code (USOC)
for Permissive mode, RJ11C. An RJ14C jack must be used to connect a two-line telephone to the modem. The Canadian equivalent to
RJ11C is CA11A and the Canadian equivalent to RJ14C is CA14A. For connection to an analog private line, an adapter cable should be
used to facilitate connection to a JM8 jack. The Canadian equivalent is CA40A.
FCC Registration number:
Ringer Equivalence number (REN):
Canadian Certification number:
Canadian DOC Load number:
(See label on modem)
(See label on modem)
(See label on modem)
(See label on modem)
Warranty, Sales, and Service Information
Contact your local sales representative, service representative, or distributor directly for any help needed. For additional information
concerning warranty, sales, service, repair, installation, documentation, training, distributor locations, or Paradyne worldwide office
locations, use one of the following methods:
• Via the Internet: Visit the Paradyne World Wide Web site at http://www.paradyne.com
• Via Telephone: Call our automated call system to receive current information via fax or to speak with a company representative.
— Within the U.S.A., call 1-800-870-2221
— Outside the U.S.A., call 1-727-530-2340
Trademarks
All products and services mentioned herein are the trademarks, service marks, registered trademarks or registered service marks of their
respective owners.
Printed on recycled paper
COPYRIGHT 1999, 2002 Paradyne Corporation. All rights reserved.
This publication is protected by federal copyright law. No part of this publication may be copied or distributed, transmitted, 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 Paradyne Corporation, 8545 126th Avenue North, P.O. Box 2826, Largo, Florida 33779-2826.
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, Paradyne Corporation reserves the right to revise this publication and to make changes from time to time in the contents
hereof without obligation of Paradyne Corporation to notify any person of such revision or changes.
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February 2002
3825-A2-GB30-41
Safety Instructions
!
Important Safety Instructions
1. Read and follow all warning notices and instructions marked on the product or included in
the manual.
2. Slots and openings in the cabinet are provided for ventilation. To ensure reliable operation of the
product and to protect it from overheating, these slots and openings must not be blocked or covered.
3. Do not allow anything to rest on the power cord and do not locate the product where persons will
walk on the power cord.
4. 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.
5. 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.
6. 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.
7. Input power to this product must be provided by one of the following: (1) a UL Listed, CSA
Certified power source with a Class 2 or Limited Power Source (LPS) output for use in North
America, or (2) a certified power source with a Safety Extra Low Voltage (SELV) output for use in
the country of installation.
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.
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COMSPHERE 3825Plus Modem
Notices
" " " " !
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January 1999
3825-A2-GB30-40
Safety Instructions
Government Requirements and Equipment Return
Certain governments require that instructions pertaining to modem connection to the public switched telephone network be included in
the installation and operation manual. Specific instructions are listed in the following sections.
United States
Notice To Users Of The Public Switched Telephone Network
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. The label is located on the bottom of
your modem.
2. Page A of this manual contains the Universal Service Order Codes (USOC) associated with the services on which the
equipment is to be connected.
3. The Ringer Equivalence (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 you experience trouble with this equipment, please contact your sales or service representative (as appropriate) for repair or
warranty information. If the product needs to be returned to the company service center for repair, contact them directly for
return instructions using one of the following methods:
• Via the Internet: Visit the Paradyne World Wide Web site at http://www.paradyne.com
• Via Telephone: Call our automated call system to receive current information via fax or to speak with a company
representative.
— Within the U.S.A., call 1-800-870-2221
— Outside the U.S.A., call 1-727-530-2340
If the trouble is causing harm to the telephone network, the telephone company may request that you remove the equipment
from the network until the problem is resolved.
7. The user is not authorized to repair or modify the equipment.
8. This equipment cannot be used on public coin service provided by the telephone company. Connection to Party Line Service
is subject to state tariffs. (Contact the state public utility commission, public service commission or corporation commission
for information.)
9. The Telephone Consumer Protection Act of 1991 makes it unlawful for any person to use a computer or other electronic
device to send any message via a telephone fax machine unless such a message clearly contains, in a 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 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 may be provided with this equipment. This equipment is designed to
be connected to the telephone network or premises wiring using a compatible modular jack which is Part 68 compliant.
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COMSPHERE 3825Plus Modem
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.
The Load Number for this equipment is listed on a label on the modem. The Load Number (LN) assigned to each terminal device
denotes the percentage of the total load to be connected to a telephone loop which is used by the device to prevent overloading. The
termination on a loop may consist of any combination of devices subject only to the requirement that the total of the Load Numbers of
all devices does not exceed 100.
If your equipment is in need of repair, refer to the procedures in the Government Requirements and Equipment Return section.
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3825-A2-GB30-40
Safety Instructions
United Kingdom
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 this modem is 1.
Connection to Leased Lines
If any other apparatus, including cable or wiring, is connected between the apparatus and the point of connection to any speechband
circuit, then all that other apparatus shall comply with the following:
1. The overall transmission characteristics of all that other apparatus shall be such as to introduce no material effect upon the
electrical conditions presented to one another by the apparatus and the speechband circuit; and
2. All that other apparatus shall comprise only:
(i) apparatus approved for the purpose of connection between the apparatus and a speechband circuit; and
(ii) cable or wiring complying with a code of practice for the installation of equipment covered by this part of BS 6328 or
such other requirements as may be applicable.
This modem is suitable for connection to BT circuits with signalling at a nominal frequency of 2280 Hz and may be connected to
multipoint or point to point circuits. The apparatus does not require signalling or otherwise use the frequency range 0 –200 Hz.
No d.c. interaction is intended between the modem and the telephone network.
This apparatus may be directly connected to a speechband circuit or connected to a relevant branch system for speechband circuits.
Connection to Supply Mains
IMPORTANT: The wires in the mains lead supplied with this equipment are coloured in accordance with the following code:
Blue — Neutral
Brown — Live
As the colours of the cores in the mains lead of this equipment may not correspond with the coloured markings identifying the
terminals in your plug, proceed as follows:
• The core which is coloured blue must be connected to the terminal which is marked with the colour N or coloured black.
• The core which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red.
All European Countries
Safety Notice
For pluggable equipment, the mains socket outlet shall be installed near the equipment and be easily accessible.
Interconnection circuits between this modem and any other equipment should be such that the equipment continues to comply with the
requirements of EN41003 for TNV (Telephone Network Voltage) circuits and EN60950 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.
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COMSPHERE 3825Plus Modem
Japan
Notices
This equipment is in the 2nd Class category (information equipment to
be used in a residential area or an adjacent area thereto) and conforms
to the standards set by the Voluntary Control Council for Interference by
Information Technology Equipment aimed at preventing radio
interference in such residential area.
When used near a radio or TV receiver, it may become the cause of
radio interference.
Read the instructions for correct handling.
Restrictions
Due to JATE (Japan Approvals Institute for Telecommunications Equipment) regulations, only 3 attempts to dial a number are
permitted in a 3-minute period. If a fourth attempt is made to dial the same number, the modem returns the ERROR return code. This
restriction applies to the number dialed from the command line or from a directory. An occurrence of the restriction is canceled when a
different number is dialed, or when 3 minutes have elapsed.
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3825-A2-GB30-40
Table of Contents
Preface
Objectives and Reader Assumptions . . . . . . . . . . . . . . . . . . . . . . . . .
How to Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
v
v
v
1. Introduction
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3825Plus Modem Front Panel
and Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1-1
1-2
2. 3825Plus Modem Installation
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3825Plus Modem Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3825Plus Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTE Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dial-Line Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-Wire Leased-Line Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Telephone Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC Power Transformer Connection . . . . . . . . . . . . . . . . . . . . . . . . .
Communications Software Installation . . . . . . . . . . . . . . . . . . . . . . .
Modem Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Factory Configuration Options . . . . . . . . . . . . . . . . . . . . .
Recovering AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initialization Strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1
2-1
2-2
2-3
2-3
2-3
2-3
2-3
2-3
2-4
2-4
2-5
2-6
3. Fax Operation
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fax Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3825-A2-GB30-40
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3-1
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COMSPHERE 3825Plus Modem
4. AT Commands and S-Registers
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Command Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AT Command List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
S-Register List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1
4-1
4-2
4-2
4-17
4-27
5. Remote Access
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1
5-1
A. Result Codes
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A-1
B. Troubleshooting
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Firmware Download . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B-1
B-5
C. Technical Specifications
D. Pin Assignments
EIA-232-E Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
JM8 to RJ11 Crossover Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D-1
D-2
E. CCITT V.25bis Dialing Commands and Responses
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Request Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Answer Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program Normal (PRN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Request List of Stored Numbers (RLN) . . . . . . . . . . . . . . . . . . . . . .
List Stored Number
Response (LSN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Command Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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E-1
E-2
E-2
E-3
E-3
E-3
E-3
E-4
3825-A2-GB30-40
Table of Contents
F. Country-Specific Configuration Options
Configuration Options by Country . . . . . . . . . . . . . . . . . . . . . . . . . .
F-1
Glossary
Index
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January 1999
3825-A2-GB30-40
Preface
Objectives and Reader
Assumptions
Appendix C lists the technical specifications of the
3825Plus modem.
Appendix D provides EIA-232-E and JM8 to RJ11
crossover cable pin assignments.
This manual describes how to install and operate the
3825Plus modem. It is intended for all users of the
3825Plus modem.
Appendix E provides V.25bis dialing information.
Appendix F shows configuration options whose
validity or default values vary according to country code.
How to Use This Manual
The Glossary provides a description of terms used
throughout this manual.
Chapter 1 provides information about the 3825Plus
modem’s hardware and software features, including the
front panel and status indicators.
Related Documents
Chapter 2 provides instructions for installing the
modem, selecting factory configuration options,
recovering the ability to use AT commands, and using
AT command initialization strings.
3980-A2-GB30
COMSPHERE 3800Plus
Modems, User’s Guide
6700-A2-GY31
COMSPHERE 6700 Series
Network Management System,
User’s Guide
6800-A2-GE26
COMSPHERE 6800 Series
Network Management System,
User’s/System Administrator’s
Guide
Chapter 3 provides general information about fax
modem operation.
Chapter 4 provides instructions for displaying and
changing AT commands and S-Registers. These
commands control all aspects of the modem’s operation,
including Security, which is described in a separate
section of this chapter.
Contact your sales or service representative to order
additional product documentation.
Chapter 5 shows how to use the Diagnostic Control
Panel (DCP) of a COMSPHERE modem to access and
control a remote 3825Plus modem.
Appendix A lists result codes produced by the modem.
Paradyne documents are also available on the World
Wide Web at:
Appendix B provides instructions for performing
diagnostic tests when data communications problems
occur, and explains the Automatic Firmware Download
process.
3825-A2-GB30-40
http://www.paradyne.com
Select Service & Support → Technical Manuals
January 1999
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3825-A2-GB30-40
Introduction
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3825Plus Modem Front Panel and Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Status Indicators (LEDs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1-1
1-1
1-2
1-2
Overview
Features
The 3825Plus modem is a member of the
COMSPHERE 3800 Series Modem product line. The
3825Plus is a high-speed dial modem that offers reliable
asynchronous and synchronous operation over dial- or
two-wire leased-line networks. The 3825Plus modem’s
software defineability allows you to add enhancements
and new features as they become available, with no
further investment in hardware, no on-site personnel, and
minimal downtime.
The 3825Plus modem has a wide variety of features,
including:
High-speed data transfer and reliable throughput at
data rates as high as 33,600 bps over dial lines is made
possible by employing the latest techniques in modem
modulations, and using ITU-T V.42bis/MNP Class 5 data
compression and ITU-T V.42/MNP error correction. In
addition to fast line speeds, the modem can send data to
the DTE at speeds as high as 115,200 bps.
The modem’s compatibility with a number of dialing
methods and protocols, such as asynchronous
AT commands and ITU-T V.25bis dialing, permits
the 3825Plus to be used in a variety of applications and
environments while also allowing control over modem
configuration, dialing, and diagnostics. The modem offers
two preset factory configurations containing the most
often used modem settings. These factory presets provide
quick configuration for any asynchronous or UNIX
hardware-based dial environment.
• Dial-Line Modulations: ITU-T V.34 (up to
33,600 bps), V.32terbo (19,200 and 16,800 bps),
ITU-T V.32bis (up to 14,400 bps), V.32 (up to
9600 bps), V.22bis (2400 bps), V.22 (1200 bps),
V.21 (300 bps), Bell 212A (1200 bps), and
Bell 103J (300 bps).
• Two-wire Leased-Line Modulations: ITU-T V.34
(up to 33,600 bps), V.32terbo (19,200 and
16,800 bps), V.32bis (14,400, 12,000, 9600, 7200,
and 4800 bps), V.32 (9600 and 4800 bps), and
V.22bis (2400 bps).
• Class 1 and Class 2 Group III Fax modulations:
ITU-T V.17 (14,400, 12,000, 9600, 7200 bps),
V.29 (9600, 7200 bps) and V.27ter (4800,
2400 bps).
• Convenient migration to new or optional features
through software downloading.
• ITU-T V.42bis and MNP Class 5 data compression.
• Virtual error-free data integrity with ITU-T V.42
and MNP Levels 2– 4 error control.
• Asynchronous dial DTE data rates from
300 bps–115,200 bps.
• Optional Enhanced Throughput Cellular (ETC),
which improves reliability and speed over cellular
links.
• Compatibility with the industry de facto standard
AT Command set.
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COMSPHERE 3825Plus Modem
• High-speed transmission using asynchronous,
synchronous, or UNIX devices over full- or
half-duplex dial networks or 2-wire leased lines.
3825Plus Modem Front Panel
and Status Indicators
• Support as a remote (tributary) device by the
COMSPHERE 6700 or 6800 Series Network
Management System.
The front panel of the 3825Plus modem is equipped
with 8 LEDs (status indicators) that monitor modem
activity (Figure 1-1).
• Compatibility with COMSPHERE 3800Plus, 3800,
and 3900 Series modems’ Remote Access Mode,
which allows users to view the configuration
options of a 3825Plus modem from their front
panel LCD displays.
• Storage of up to 10 telephone numbers to directory
locations.
Status Indicators (LEDs)
The 3825Plus’s status indicators continuously provide
information on the modem’s operating condition.
Table 1-1 lists the label, color and functionality of each
status indicator.
• Originate Security and three Answer Security
modes.
• Callback Security with telephone directory index or
telephone number.
• Two factory-defined configurations and two
user-defined configuration areas.
3825Plus
EC/SQ HS/RI CD OH/APL RD
SD
TR MR/Pwr
495-14694
Figure 1-1. 3825Plus Front Panel
1-2
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3825-A2-GB30-40
Introduction
Table 1-1
3825Plus LEDs
Label
EC/SQ
Color
green
Indicates
Error Control/Signal Quality
ON: The modem is in Error Control mode.
Off: The modem is not in Error Control mode.
Flashing; Predominantly ON: The modem is in Error Control mode and is receiving errors due
to poor VF line signal quality.
Flashing; Predominantly Off: The modem is not in Error Control mode and is receiving errors
due to poor VF line signal quality.
HS/RI
green
High Speed/Ring Indicate
ON: Modem is operating at the rate for which it is configured.
Off: Modem is operating at a lower rate than that for which it is configured.
Cycling ON and Off: The Ring Indicate signal is being sent to the DTE.
CD
green
Carrier Detect
ON: The modem has detected a valid modulation carrier signal and is capable of transferring
received data to the DTE.
OH/APL
green
Off-Hook/Analog Private Line
ON: The modem is off-hook and set for Dial.
Off: The modem is on-hook and set for Dial.
Slow Flashing: Modem is set for Leased (APL).
RD
green
Receive Data
ON: Received data is being transferred to the DTE.
SD
green
Send Data
ON: The modem is receiving data from the DTE to transmit.
TR
green
Terminal Ready
ON: The DTE has turned ON the DTR (Data Terminal Ready) signal or the modem is
configured to ignore DTR.
Off: The DTR signal is Off.
MR/Pwr
green
Modem Ready/Power
ON: Signifies that Power is ON if the modem is set for Dial and is on-hook. Signifies that
the EIA DSR (Data Set Ready) signal is ON if the modem is off-hook or set for Leased.
Off: Signifies that Power is Off if the modem is set for Dial and is on-hook. Signifies that the
EIA DSR signal is Off if the modem is off-hook or set for Leased.
Slow Flash: Modem is in download-only mode.
Fast Flash: Modem is in cloning mode.
NOTE: In Leased mode, Power is ON when the OH LED is flashing.
3825-A2-GB30-40
January 1999
1-3
COMSPHERE 3825Plus Modem
1-4
January 1999
3825-A2-GB30-40
3825Plus Modem Installation
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3825Plus Modem Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Customer-Supplied Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3825Plus Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTE Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dial-Line Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-Wire Leased-Line Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Telephone Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AC Power Transformer Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communications Software Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Modem Power-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Factory Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recovering AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Initialization Strings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V.25bis Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Synchronous Leased-Line Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AT&T Exclusive Dialing for DATAKIT Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
2-1
2-1
2-1
2-2
2-3
2-3
2-3
2-3
2-3
2-3
2-4
2-4
2-5
2-6
2-6
2-6
2-6
Overview
Customer-Supplied Equipment
This chapter describes how to connect both provided
and customer-supplied cables to the modem. In addition,
it describes how to recover AT commands when the
modem is in Dumb mode and how to enter initialization
strings for unique applications.
The following customer-supplied equipment is
required to complete a data communications system using
a 3825Plus modem:
• A DTE (a computer or a terminal) with an available
RS-232-E serial port.
• A shielded RS-232-E cable with a male DB-25
connector at one end to attach to the modem.
3825Plus Modem Package
After opening the modem’s package, check for damage
and verify that the following items are present:
• One of the following modular dial or leased
network interfaces:
• Quick Reference
— RJ11C or RJ14C for dial applications
• 3825Plus modem
— JM8 for 2-wire leased network interface
• For leased-line applications, a JM8 to RJ11
crossover cable (see Appendix D).
• Power transformer
• One 6-position, 4-wire modular cord (in selected models)
If any hardware components are damaged, notify your
sales representative. Return equipment using the
procedures described in the Government Requirements
and Equipment Return section in the front of this book.
3825-A2-GB30-41
February 2002
2-1
COMSPHERE 3825Plus Modem
3825Plus Installation
The rear panel of the 3825Plus modem (Figure 2-1)
has the following switches and connectors:
Before installing your standalone modem, make sure
your installation site is clean and well-ventilated. Allow
space around the modem for installing cables and
telephone cords, and make sure the modem is located
within reach of the ac power outlet. The distance between
your modem and DTE (computer or terminal) should not
exceed 50 feet if DTE data rates exceed 19,200 bps.
• An ON/Off power switch.
• A power receptacle for ac power transformer.
• A 25-pin DB-25 receptacle for your computer.
• A 6-pin modular jack for external telephone set use
only.
• A 6-pin modular jack for dial (PSTN) lines or
2-wire leased lines.
On/Off
Power
Computer
Phone
Line
Dial or
Leased-Line
Network
Interface
PC
Customer-Supplied
Cable
Customer-Supplied
Cable
495-14695
Figure 2-1. 3825Plus Rear Panel
2-2
January 1999
3825-A2-GB30-40
3825Plus Modem Installation
DTE Connection
Telephone Connection
Use the following procedure to connect the RS-232-E
cable from the modem to the DTE:
Use the following procedure to connect the modem to a
single-line or two-line telephone:
" Procedure
" Procedure
1. Make sure the modem’s rear panel power switch is
Off.
1. Insert the 6-position, 4-conductor modular plug into
the jack labeled PHONE.
2. Connect the DB-25-P (male) connector on the cable
to the DB-25-S (female) connector labeled
COMPUTER (Figure 2-1) on the modem’s rear
panel. Use a small screwdriver to tighten the cable
to the modem.
2. Insert the other end of the modular cord into the
telephone.
3. Connect the DB-25-P connector on the cable to the
DB-25-S connector on the DTE. Use a small
screwdriver to tighten the cable to the DTE.
AC Power Transformer
Connection
Use the following procedure to connect the modem to
an ac power outlet:
Dial-Line Connection
" Procedure
1. Make sure the modem’s power switch is in the Off
position.
Use the following procedure to connect a 3825Plus to
the dial network interface.
2. Insert the power transformer’s cylindrical connector
into the modem’s rear panel ac power receptacle
labeled POWER (Figure 2-1).
" Procedure
1. Insert the 6-position, 4-conductor modular plug into
the jack labeled LINE, Figure 2-1.
3. Insert the power transformer into an ac power
outlet.
2. Insert the other end of the modular cord into the
dial network interface.
Communications Software
Installation
2-Wire Leased-Line
Connection
A personal computer commands and controls a dial
modem through communications software. This software,
which is installed on the PC, uses the AT command set to
send instructions to the modem. A dumb asynchronous
terminal, however, does not require this software since it
can directly send AT commands.
Use the following procedure to connect a 3825Plus
modem to the 6-pin, center pair, leased-line network
interface. A description of the JM8 to RJ11C crossover
cable required can be found in Appendix D.
" Procedure
1. Insert the 6-position, 4-conductor modular plug into
the jack labeled LINE, Figure 2-1.
2. Insert the other end of the modular cord into the
leased-line network interface.
3825-A2-GB30-40
The 3825Plus can be used with any major
communications software. Refer to your software’s user’s
guide for installation procedures. For an overview of how
to use AT commands and a list of AT commands
supported by the 3825Plus, refer to Chapter 4, AT
Command Set and S-Registers.
January 1999
2-3
COMSPHERE 3825Plus Modem
Modem Power-Up
NOTE
If you have already changed
certain configuration options, you
may have lost AT command
control. For example, operating in
Synchronous mode or disabling AT
commands results in an inability to
change configuration options. To
regain AT command control, refer
to the Recovering AT Commands
section for these procedures.
Once your modem is properly connected to the DTE,
dial or leased lines, and ac outlet, press the modem’s rear
panel power switch to the ON position. The modem
begins a power-up self-test in which all front panel LEDs
momentarily light (note that this also occurs on a reset of
the modem), and the Power LED remains ON. The state
of other LEDs depends on your modem’s configuration.
See Table 1-1 in Chapter 1.
On initial power-up, the modem is in Command mode.
To verify that the modem is connected and functioning
properly, enter the following:
TYPE:
AT
PRESS:
Enter (Return)
To change a factory template, perform the following
steps (for more information on changing factory templates
using AT commands, refer to Chapter 4, AT Commands
and S-Registers).
The screen displays OK.
" Procedure
If the modem does not return OK, refer to
Appendix B, Troubleshooting.
1. Use the AT&F&W command to load the
appropriate factory configuration to the appropriate
storage area. Enter the following:
Selecting Factory
Configuration Options
TYPE:
AT&Fy&Wn
Where:
y is one of the following Factory
configurations:
After the modem passes the power-up self-test, it can
be configured for operation using one of the factory preset
configurations.
0 for Async Dial
3 for UNIX Dial
5 for Cellular (Mobile)
6 for Cellular (PSTN)
The purpose of preset configurations is to simplify the
customization your modem.
These factory preset templates contain the most
commonly used configuration options (straps) for
Asynchronous Dial, UNIX Dial, and Cellular
configurations. Your modem is shipped from the factory
with the Async Dial default configuration options stored
in memory. If UNIX Dial, Cellular (Mobile) or Cellular
(PSTN) is more appropriate for your configuration, then
you must change the factory setting as described as
follows.
(&F5 and &F6 are available only if
ETC is installed.)
and
Where:
0 for Active (Saved)
1 for Customer 1
2 for Customer 2
These three configuration areas are
nonvolatile memory locations.
Active (Saved) contains the most
recently saved changes to any
configuration options. In the event of
power loss, the modem retrieves these
configuration options. Customer 1 and
Customer 2 are user-defined
configuration storage areas.
2. PRESS:
2-4
January 1999
n is one of the following storage areas:
Enter (Return)
3825-A2-GB30-40
3825Plus Modem Installation
The selected factory configuration is saved.
If these settings are not appropriate, then change them
to a setting compatible with your current application.
The procedures for an AT recovery using an
asynchronous terminal or personal computer are listed in
the following section. Read through these procedures
before performing a recovery:
NOTE
When configuring your modem,
keep a record of its configuration
options as a future reference in
case the modem must be
replaced.
To establish a connection with a remote modem, use
the D (Dial) command. Refer to Chapter 4, AT Commands
and S-Registers, for more information.
At least three consecutive A’s must be entered
within a 2-second time interval.
Recovering AT Commands
AT commands are issued from asynchronous terminals
and personal computers. Certain dialing methods, such as
V.25bis and synchronous operation, disable the use of AT
commands and place the modem into a state known as
Dumb mode. The 3825Plus is capable of normal
operation when in Dumb mode. However, if the setting of
a configuration option must be changed, it can only be
accomplished using an AT command.
The AT Recovery command (AT***) places the
modem into a temporary state that restores AT commands.
When in this state, the modem’s previous settings are
retained except for the following configuration options:
• The DTE Dialer Type configuration option
(&M and &Q) is set to AT
If these characters are not echoed back to the DTE
screen after the power-up self-test is complete, then
the modem is still in Dumb mode and maintains its
current configuration. Turn the modem Off and
then ON again, and repeat Step 1.
2. Once the characters are echoed back to the DTE,
TYPE:
T***
(The case of this character must be consistent with
the case used in Step 1. Mixed case prefixes such as
aT or At are not recognized.)
This must be entered within 10 seconds after
receiving the echoed characters.
PRESS:
Enter
The screen displays OK.
• The Async/Sync Mode configuration option
(&M and &Q) is set to Async
• The DSR Control configuration option (&S) is set
to Forced On
• The LSD Control configuration option (&C) is set
to Forced On
3825-A2-GB30-40
1. Turn the modem Off and then ON. The modem
performs a power-up self-test in which all LEDs
light. While this is running, repeatedly press the
A key of your DTE’s keyboard (or keep the key
depressed if your keyboard automatically repeats
characters that way). Keep doing this until A’s (or
a’s) appear on your DTE screen. (You may use all
uppercase or all lowercase characters.)
January 1999
The modem is now in AT Recovery mode, and
remains in this state until a Save or power reset
occurs. While in this mode, you can use AT
commands to make any necessary changes to
configuration options.
Keep in mind that the &C command is changed to
Forced On (&C0), the &M and &Q commands are
changed to Async mode with AT commands
enabled (&M0 and &Q0), and the &S command is
changed to Forced On (&S0). If these settings are
not appropriate, then reset them to a desired choice
before exiting AT Recovery mode.
2-5
COMSPHERE 3825Plus Modem
Synchronous Leased-Line Applications
3. To save changes, use the &W command:
TYPE:
AT&Wn
Where:
n is one of the following storage areas:
PRESS:
For synchronous leased-line operation, create the
following initialization string with the following
commands:
0 for Active (Saved)
1 for Customer 1
2 for Customer 2
TYPE:
AT&F &D1 &S1 S44=n S45=n S82=n
&M1 &W &Ln &W
Enter
Where:
n is the value for the AT command. Refer
to either Table 4-1 or Table 4-2 in
Chapter 4 to determine the best possible
values for these commands.
PRESS:
Enter
The modem exits AT Recovery mode and returns to
its previous application environment. Only the
Active (Saved) area affects modem operation. To
move a Customer area to Active (Saved), use the Z
command. See Chapter 4 for more information.
AT&T Exclusive Dialing
for DATAKIT Applications
Initialization Strings
An initialization string contains several AT commands
that are entered at once to program the modem for a
specific application.
For AT&T exclusive dialing for DATAKIT
applications, create an initialization string with the
following commands:
The following initialization strings identify essential
AT commands that directly impact modem operation for a
particular application. If you need to modify these strings
for your application, make sure additional commands are
inserted somewhere in the middle of the initialization
string. Whenever an &L command is used, it must appear
at the end of an initialization string.
TYPE:
AT&F &C5 &D1 &S3 &R0 \D3 \Q1 \G1
S85=1 &M235 &W
PRESS:
Enter
V.25bis Applications
For V.25bis HDLC (High-level Data Link Control)
dial-line operation, create an initialization string with the
following commands. Note that the character format can
be 8 data bits, no parity, and 1 stop bit; 7 data bits, odd
parity, and 1 stop bit; or 7 data bits, even parity, and
1 stop bit:
TYPE:
AT&F &D1 &S1 &M234 &W
PRESS:
Enter
For V.25bis bisync operation, create an initialization
string with the following commands. Note that the
character format must be 7 data bits, odd parity, and
1 stop bit:
2-6
TYPE:
AT&F &D1 &S1 &M233 &W
PRESS:
Enter
January 1999
3825-A2-GB30-40
Fax Operation
3
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Fax Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
• You must have configured your modem according
to the specifications of your fax software manual.
For example:
Overview
The procedures for sending and receiving facsimile
documents with your modem depend on the fax software
you use. This chapter does not contain specific
procedures, but rather information that may make it easier
for you to use the documentation that came with your fax
software.
— Some fax software requires that the modem
have Auto-Answer disabled. You can set this
with the ATS0=0 command.
— Some fax software requires that the modem use
software flow control. You can set this with the
AT \Qn command.
Fax Operation
— DTR Action should be set for standard
RS232-D operation. Use the AT&D2
command.
Your modem, in combination with your computer and
fax software, is capable of emulating the functions of a
fax machine. You can use it to send and receive fax files
in communication with another fax modem, or with a
standard fax machine. These fax files are images turned
into the sort of data that can be stored in your computer.
Fax machines and fax modems use special protocols
different from those used by standard modems. The
device you intend to communicate with must be
compatible with your modem, which means that it must
be capable of using the same protocol. Your 3825Plus
modem supports Class 1 (EIA 578) and Class 2 (EIA/TIA
SP-2388) Group III fax, using V.17, V.29, or V.27ter
modulations.
Before you can send or receive a fax, the following
must be true:
• Your modem must be online with a compatible fax
modem or fax machine.
— LSD (Line Signal Detect) Control should be set
for standard RS232-D operation. Use the
AT&C1 command.
If your fax software requires that you change the
configuration of your modem, see the appropriate sections
of Chapter 4, AT Commands and S-Registers.
Your fax software uses AT commands to tell the
modem what to do. These commands, and the replies your
modem makes (such as “OK”), may be displayed on your
computer terminal during fax operation, but this depends
on your software. You do not have to issue AT commands
yourself, unless you use AT commands to configure the
modem.
For more information about fax operation, see the
manual that came with your fax software.
• You must have fax software installed on your
computer.
3825-A2-GB30-40
January 1999
3-1
COMSPHERE 3825Plus Modem
3-2
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switching Between Data Mode and Online Command Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Escape Sequence and Escape Guard Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Command Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AT Command List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
S-Register List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Password Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Originate Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Answer Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Callback Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security Configuration Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1
4-1
4-1
4-1
4-2
4-2
4-17
4-27
4-27
4-27
4-27
4-28
4-28
Switching Between Data Mode
and Online Command Mode
Overview
This chapter discusses guidelines necessary to operate
AT commands as well as listing all AT commands
supported by the 3825Plus modem. AT commands are
issued from asynchronous DTEs.
Operating Modes
The 3825Plus modem has two operating modes:
Command mode and Data mode. 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
known as result codes. Refer to Table A-1 in Appendix A
for a listing of result codes.)
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
DTE are considered data and are transmitted and received
between modems. The modems remain in Data mode until
the connection is broken or until they are forced into
online Command mode using the escape sequence (+ + +).
3825-A2-GB30-40
4
Sometimes it is necessary to change operating
parameters while the modems are online. The Escape
Sequence allows you to toggle the modem between Data
mode and online Command mode while maintaining a
connection with the remote modem. This is accomplished
using the escape sequence (+ + +) to exit Data mode and
the O command to return to Data mode.
Escape Sequence and Escape Guard Time
The escape sequence is only issued when the modem is
online and in Data mode. The 3825Plus modem uses three
consecutive plus (+) characters as the escape sequence.
(To change this value, refer to S-register S2 discussed
later in Table 4-2 in the S-Register List section.)
To prevent the modem from interpreting an embedded
+ + + in data as an escape sequence, the Escape Guard
Time value determines the idle time required before and
after the escape sequence is issued. The 3825Plus uses a
1-second pause as the Escape Guard Time. (To change
this value, refer to S-register S12 discussed later in
Table 4-2 in the S-Register List section.)
January 1999
4-1
COMSPHERE 3825Plus Modem
• Commands with the suffix n have several options
associated with them. For example, in the Ln
command, L1 sets the speaker volume to Low and
L3 sets the speaker volume to High. Omitting the
suffix has the same effect as using a zero suffix; for
example, ATX is equivalent to ATX0.
To enter online Command mode while in Data mode,
enter the following sequence:
TYPE:
+++
Use the O command to return to Data mode from
online Command mode. Enter the following command:
TYPE:
ATO
PRESS:
Enter
• The A/ command (without pressing the Enter key)
causes the modem to repeat the last command
entered.
• Valid commands are acknowledged with numeric or
word result codes (unless the result codes have
been disabled using the Q1 command).
Command Guidelines
Review the following guidelines before using any
AT Commands.
• The escape sequence (+ + +) is used to enter online
Command mode from Data mode.
AT Command List
• The asynchronous character format for the
AT command set must be one of the following:
AT commands are issued from an asynchronous DTE,
such as a PC, and control the modem’s operation and
software configuration. AT commands are only applicable
when the DTE Dialer Type configuration option is set for
AT. (See &Mn and &Qn commands.)
— 8 data bits + no parity + 1 stop bit.
— 7 data bits + no parity + 2 stop bits.
— 7 data bits + parity + 1 stop bit (parity can be
odd, even, mark, or space).
• All commands (except A/ (repeat last command)
and (+ + +) must begin with the characters AT and
end by pressing the Enter key. The AT (or at) prefix
clears the command buffer and matches the modem
speed and parity to that of the DTE. Commands can
be upper- or lowercase, but the modem will not
recognize mixed case prefixes (At or aT).
• Commands can be entered one at a time or in
strings. Strings can have up to 40 characters after
the AT prefix. You can use spaces, hyphens (-), and
parentheses ( ) as fillers to make the commands
easier to read; the modem ignores these fillers and
they are not counted among the characters which
make up the command string. Commands must be
entered on one line and end with the return
character (Enter key).
4-2
Appendix A lists all available result codes with
numeric and word equivalents.
AT commands are entered while the modem is in
Command mode and use the following format:
TYPE:
ATXn
Where:
X is the AT command and n is the specific
value for that command.
PRESS:
Enter
Table 4-1 lists all AT commands supported by the
3825Plus modem. The Async Dial factory default is listed
in bold.
Reference to particular country codes in this guide is
not an assurance that the modem has been approved for
use in that country. Consult your sales representative.
Not all commands are valid in all countries. See
Appendix F.
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Table 4-1
(1 of 14)
3825Plus AT Commands
***  AT Command Recovery Mode
Allows the modem to remain in Asynchronous data mode so that AT commands can be used to change the modem’s
current configuration. Use this command when AT commands are disabled or the modem is operating in Synchronous
data mode.
This command can only be executed after the completion of a power-up self-test. Refer to the Recovering AT Commands
section in Chapter 2 for procedures and guidelines on this command.
A /  Repeat Last Command
Reexecutes the last command string. (Not to be preceded with AT or followed by pressing the Enter key.)
A  Answer Mode
Allows the modem to go off-hook and attempts to establish a connection without waiting for a ring.
B  ITU-T/Bell Mode
Determines the protocol used if the dial-line rate is set to 300 or 1200 bps. It has no effect if the rate is set to another
value. (See %B.)
B, B0
B1
V.21 or V.22 (300 or 1200 bps)
Bell 103 or Bell 212A (300 or 1200 bps)
3825-A2-GB30-40
January 1999
4-3
COMSPHERE 3825Plus Modem
Table 4-1
(2 of 14)
3825Plus AT Commands
Dn  Dial
Begins the dialing sequence. The dial string n (modifiers and telephone number) is entered after the D command.
Any digit 0–9, * , # , A, B, C, D, may be dialed as a DTMF tone. Only the digits 0–9 can be dialed in Pulse Dial mode.
The following example shows how to dial through a PBX. The dial string consists of the command string and the
telephone number:
ATDT9,5551234
Command Telephone
String
Number
Dial String
Modifiers include the following parameters:
T – Tone (DTMF) dial. Any digit 0–9, * , # , A, B, C, or D can be dialed as tone.
P – Pulse dial. Only the digits 0–9 can be dialed in Pulse Dial mode. This is invalid in Denmark, Norway, and Sweden.
See Appendix F.
NOTE: Once a dialing method (tone or pulse) has been specified, it will remain active only until the end of that dial string.
The factory setting is Tone dial.
, – 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. This can be the initial dial
tone or a second tone received when dialing through a tandem PBX (for example, 9W555-6789), or when invoking
special features (for example, 70#W555-6789, where 70# is the local telephone company command that disables Call
Waiting).
R – Reverse Dial mode. Causes the originating modem to send out an answertone once it no longer detects ringback.
(Ringback is the ring you hear at the originating site when making a call.) The R parameter must be the last character in
the dial string. For correct operation, at least one ringback must be detected; therefore, the remote modem should be
configured to answer on the second ring or subsequent rings.
@ – 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 DTE.
! – Hook flash. This causes the modem to go on-hook for 0.5 seconds, then return to off-hook.
; – Return to Command mode. Modem returns to Command mode after dialing a number without disconnecting the call.
This is useful when the number exceeds 40 characters, or when the wait time between parts of a dial string is unknown.
Space, – , and ( ). These characters are ignored by the dial string and can be included in the dial string to enhance
readability.
DS=n  Dial Stored Number
Dials the number stored in Location n (1–10). (To store a telephone number, refer to the &Zn=x command.)
En  Command Character Echo
Controls whether or not characters are echoed back to the DTE when the modem is in Command mode.
E, E0
E1
4-4
Disables echo to the DTE.
Enables echo to the DTE.
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Table 4-1
(3 of 14)
3825Plus AT Commands
Hn  Hook Switch Control
Allows the modem to go off-hook or on-hook.
H, H0
H1
Modem goes on-hook.
Modem goes off-hook.
In  Identification
Provides useful information when upgrading or servicing the product.
I, I0
I1
I2
I3
I4
I5
I6
I7
I9
Displays product code (default is 144).
Displays 3-digit firmware revision number.
Performs an EPROM check.
Displays serial number.
Displays model number.
Displays hardware part number.
Displays software part number.
Displays country code.
Displays 3-digit firmware revision number (same as I1).
I10
Allows you to change the value displayed by I0:
I10=0 causes I0 to display 144 (default).
I10=1 causes I0 to display 240.
I10=2 causes I0 to display 480.
I10=3 causes I0 to display 960.
I10=4 causes I0 to display 120.
I11
I17
I19
Displays the program memory checksum.
Displays the last eight critical errors; the first is the most recent. (Support personnel use only.)
Displays the entire firmware revision number.
Ln  Speaker Volume
Adjusts speaker volume.
L, L0
L1
L2
L3
Selects low volume.
Selects low volume.
Selects medium volume.
Selects high volume.
Mn  Speaker On/Off
Turns speaker on and off.
M, M0
M1
M2
Speaker always Off.
Speaker on until carrier signal is detected.
Speaker always ON.
O  Return to Online or Data Mode
Returns modem to Data mode from Online Command mode.
P  Pulse Dial
Sets the modem for Pulse Dial mode. See D command.
3825-A2-GB30-40
January 1999
4-5
COMSPHERE 3825Plus Modem
Table 4-1
(4 of 14)
3825Plus AT Commands
Qn  Result Codes
Result codes are informational messages (such as Connect and Ring) sent from the modem and displayed on the
asynchronous DTE terminal. Refer to Table A-1 for a list of result codes.
Q, Q0
Enables modem to send result codes to the DTE.
Q1
Disables modem from sending result codes to the DTE.
Q2
Enables in Originate mode only for modem to send result codes to the DTE. Required for most
UNIX applications.
Sn =r  Change S-Register
Changes the contents of an S-register, where n is the S-register, and r is the new value.
Sn?  Display S-Register
Displays the value of an S-register, where n is the S-register number.
T  Tone Dial
Sets the modem for Tone (DTMF) dial mode. See D command.
Vn  Result Codes Format
Controls whether or not result codes appear as words or as numeric codes. Some DTEs do not recognize result codes as
words; therefore, numbers are required. The Numbers (2) format is required for some modem pooling applications. Refer
to Table A-1 for a list of result codes.
V, V0
V1
V2
Displays result codes in Number (1) format (digits).
Displays result codes as text.
Displays result codes in Number (2) format (digits).
Xn  Extended Result Code, Dial Tone Detect, and Busy Tone Detect
The Xn command sets three configuration options simultaneously:
X0
X1
X2
X3
X4
X5
X6
X7
Extended
Result Code
Dial Tone
Detect
Busy Tone
Detect
Disable
Enable
Enable
Enable
Enable
Add/EC
Add/V42,MNP
Use DTE Rate
Disable
Disable
Enable
Disable
Enable
Enable
Enable
Enable
Disable
Disable
Disable
Enable
Enable
Enable
Enable
Enable
EXTENDED RESULT CODE
Informational messages such as VF (line) connect rate and Error Control are displayed with the result codes.
Disable.
Displays basic result codes: OK, CONNECT, RING, NO CARRIER, and ERROR.
Enable.
Displays basic result codes in addition to the CONNECT rate message (for example, CONNECT 14400).
4-6
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Table 4-1
(5 of 14)
3825Plus AT Commands
Xn, continued
Add/EC.
If error control is negotiated, attaches the /EC suffix to the CONNECT rate message.
Add/V42,MNP. Attaches the V42b, V42, MNP5, MNP4, MNP3, MNP2, or NoEC suffix to the CONNECT
rate message.
Use DTE Rate. Displays DTE data rate instead of line CONNECT rate message.
DIAL TONE DETECT
Sets the modem for dial tone detection (enable) or blind dialing (disable).
Disable.
Sets the modem for blind dialing. (This is invalid for Belgium, Denmark, France, Netherlands, Norway,
Sweden, and Switzerland. See Appendix F.)
Enable.
Sets the modem for dial tone detect.
BUSY TONE DETECT
Sets the modem to monitor for Busy Tone (Enable) or ignore Busy Tone (Disable).
Disable.
Enable.
Modem ignores busy tone.
Modem monitors for busy tone.
Yn  Long Space Disconnect
Determines the modem’s response to a continuous spacing condition sent from the remote modem when it goes on-hook.
Issuing a long space is one method of disconnecting a call.
Y, Y0
Y1
Disable. Ignores long space.
Enable. Disconnects if long space is detected. Enables transmission of a long space.
Zn  Reset and Load Active
Z, Z0
Z1
Z2
Z3
Z9
Loads configuration options from Active (Saved) to Active (Operating).
Loads configuration options from Customer 1 to Active (Operating).
Loads configuration from Customer 2 to Active (Operating).
Loads configuration options from Active (Saved) to Active (Operating) and performs a reset.
Performs a full modem reset as if the modem were powered off and on.
″F  Clear Error Buffer
Clears the buffer where information about the last critical error is stored. For support personnel use only.
″F
Clear error buffer.
″Hn  V.42bis Compression
Enables or disables V.42bis data compression.
″H, ″H0
″H1
″H2
″H3
Disable.
Transmit only.
Receive only.
Enable.
3825-A2-GB30-40
January 1999
4-7
COMSPHERE 3825Plus Modem
Table 4-1
(6 of 14)
3825Plus AT Commands
&&P1  Clone Remote
Copies the firmware from the modem that receives the command to another 3825Plus modem. The modem must be in
Online Command mode. (Online Command mode is established with the +++ escape sequence.) The initial response to
the command is the message Cloning Remote, or one of several error messages, such as:
NO CIRCUIT
INCOMPATIBLE MODULATION
REMOTE ACCESS DISABLED
INVALID REMOTE PASSWORD
If the cloning is successful, the messages Clone Completed and OK are sent to the DTE. If the cloning fails, the ERROR
result code is preceded by an explanatory message:
Clone Aborted
Clone Failed: COMM
Clone Failed: SEQ
Clone Failed: Incompat. Config.
In the event of an error, the remote modem is placed in download-only mode, signaled by the slow flash of its MR/Pwr
LED. Contact Technical Support if you are unable to complete the cloning.
&Cn  LSD Control
Line Signal Detect (LSD) is a signal indicating that the carrier signal is being received from the remote modem. It is
normally turned Off to the DTE when the power level of the received carrier signal drops below the carrier detect
threshold.
&C0
Forced On. LSD ON at all times.
&C1
Standard RS232. LSD is ON when the remote modem’s carrier signal is detected. LSD is Off when
carrier signal is not detected.
&C2
Wink When Disconnect. LSD normally forced ON, turns Off for approximately one second upon disconnecting.
&C3
Follows DTR. State of LSD follows state of DTR.
&C4
Simulated Control Carrier. State of LSD follows state of remote modem’s RTS via V.13 simulated
control carrier signaling. Note that the remote modem’s RTS Action configuration option must be
set to Simulated Control Carrier.
&C5
DTR/Disconnect Off. State of LSD follows state of DTR except upon a disconnect where LSD
always turns Off. DTR must then toggle Off and ON to turn LSD ON. Use this setting for AT&T
DATAKIT applications. Note that to use this configuration option, the DTR Action configuration
option must be set to Stndrd_RS232 (&D1 or &D2).
&C6
Bridge Retrain. LSD behaves as if it were set for Standard RS232, except that it is turned Off when
a retrain condition lasts longer than 10 seconds, and turned ON when no retrain condition is
detected for 10 seconds.
&Dn  DTR Action
Data Terminal Ready (DTR) is a signal from the DTE to the modem indicating that the DTE is connected and ready for
operation.
&D0
Ignore. Modem ignores the true status of DTR and treats it as always ON.
&D1
Off=Command Mode. Modem enters online Command Mode if connected when DTR switches off.
&D2
Standard RS232. DTR Signal is controlled by the DTE.
&D3
Off=Reload Strap. Follows Standard RS232 operation, except that when DTR switches Off, the
modem loads the Active (Saved) area into the Active (Operating) area.
&D4
Controls On-Hook. Follows Standard RS232 operation, except that modem does not disconnect
until DTR is lowered by the DTE.
4-8
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Table 4-1
(7 of 14)
3825Plus AT Commands
&Fn  Select Factory Default Configuration Options
Loads factory configuration options into the Active (Operating) area. The &F5 and &F6 commands are valid only if ETC is
installed.
&F0
&F3
&F5
&F6
Async Dial
UNIX Dial
Cellular (Mobile)
Cellular (PSTN)
If ETC is installed and your modem is attached to a cellular telephone, use the &F5 command to configure the modem for
cellular communications. &F5 sets the following configuration options:
Option
Maximum Frame Size
Error Control Mode
Auto-Answer Rings
No Answer Timeout
No Carrier Disconnect
V.32bis Train
V.32bis Autorate
V.42 ARQ Window Size
Cellular Enhancements
AT
Command
Value
\A4
\N4
S0=3
S7=120
S10=100
S43=1
S76=3
S89=9
S91=1
If ETC is installed and your modem is attached to a normal dial telephone line but sometimes communicates with a
modem that is attached to a cellular phone, use the &F6 command. &F6 (Cellular(PSTN)) sets the following configuration
options:
Option
Transmit Level
Error Control Mode
No Answer Timeout
No Carrier Disconnect
V.32bis Train
V.42 ARQ Window Size
Cellular Enhancements
AT
Command
Value
&I99
\N4
S7=120
S10=100
S43=1
S89=9
S91=1
&Gn  V.22bis Guard Tone
Determines whether the V.22bis guard tone is disabled, set to 550 Hz, or set to 1800 Hz.
&G0
&G1
&G2
Disable
550 Hz
1800 Hz
NOTE: The default and permitted settings of this option are country-dependent. See Appendix F.
3825-A2-GB30-40
January 1999
4-9
COMSPHERE 3825Plus Modem
Table 4-1
(8 of 14)
3825Plus AT Commands
&In  Dial Transmit Level for Cellular Auto
When Dial Transmit Level Type is set to Permissive, &In sets Dial Transmit Level to a value between –10 and – 32 dBm.
&I99 and &I100 causes the level to be varied automatically according to conditions for Enhanced Throughput Cellular
(ETC) operation. &J0 overrides this command, and is the default for North America. See Appendix F.
&I0
D
D
&I7
&I8
&I9
&I10
&I11
&I12
&I13
&I14
&I15
&I16
D
D
– 0 dBm
D
D
–7 dBm
–8 dBm
–9 dBm
–10 dBm
–11 dBm
–12 dBm
–13 dBm
–14 dBm
–15 dBm
–16 dBm (Set by &F5 if ETC installed)
D
D
&I32
– 32 dBm
&I99
Available only if ETC is installed. Automatically adjusted according to the ETC1.0 specification. Set by &F6.
Use only with remote modems set to &I99, and limit the data rate to 4800 bps (S41 = 5).
&I100
Available only if ETC is installed. Automatically adjusted according to the ETC1.1 specification.
NOTE: The default and permitted settings of this option are country-dependent. See Appendix F.
&Jn  Dial Transmit Type
Sets the power output level of the transmit signal over dial lines. Overrides the &I command.
&J0
Permissive (–9 dBm). Valid only for North America.
&Ln  Leased Mode
Sets the modem for 2-wire leased-line operation in Answer mode or in Originate mode.
&L0
&L1
&L3
Disables leased-line operation.
2-wire originate leased-line operation.
2-wire answer leased-line operation.
The &L command will cause the modem to reset before entering or exiting Leased-Line mode. Therefore, it must be
entered as the last command in an initialization string.
WARNING: Do not configure the modem for leased line operation if the modem is connected to the PSTN.
4-10
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Table 4-1
(9 of 14)
3825Plus AT Commands
&Mn or &Qn  Async/Sync Mode and DTE Dialer Type
Sets the modem for either asynchronous or synchronous operation and selects the type of dialing method the modem
uses.
&M, &M0, &Q, &Q0
Modem operates in Asynchronous mode and uses AT Command protocol.
&M1, &M3, &Q1, &Q3
Modem operates in Synchronous mode and uses AT Command protocol.
&M2, &Q2
Modem operates in Synchronous mode and dials the telephone number stored in directory location 1
when the DTR signal turns Off and then ON.
&M231, &Q231
Modem operates in Asynchronous mode and disables any type of AT command dialing protocol.
&M232, &Q232
Modem operates in Asynchronous mode and uses V.25bis asynchronous dialing.
&M233, &Q233
Modem operates in Synchronous mode and uses V.25bis bisynchronous dialing.
&M234, &Q234
Modem operates in Synchronous mode and uses V.25bis HDLC dialing.
&M235, &Q235 Modem operates in Asynchronous mode and enables a subset of the AT&T command set. This is
required for AT&T DATAKIT dial-out applications.
The &M2, &M231 through &M235, &Q2, and Q231 through Q235 commands disable the use of AT commands and force
the modem into Dumb mode. The only way to regain control of the modem is to recover AT Commands as described in
the Recovering AT Commands section in Chapter 2.
&Rn  RTS Action
Request-to-Send (RTS) is a signal from the DTE to the modem indicating the DTE has data to send to the modem.
&R, &R0 Standard RS232. DTE controls RTS to the modem in normal EIA-232-D operation. RTS must be
ON for the DTE to transmit to the modem.
&R1
Ignores RTS. Modem assumes RTS is always ON. Use this selection when the DTE does not
provide RTS to the modem.
&R2
Simulated Control Carrier. RTS input controls the remote modem’s LSD signal. This is used for
DTEs that require Line Signal Detect (LSD) to toggle ON and Off to simulate half-duplex operation.
3825-A2-GB30-40
January 1999
4-11
COMSPHERE 3825Plus Modem
Table 4-1
(10 of 14)
3825Plus AT Commands
&Sn  DSR Control
Data Set Ready (DSR) is a signal from the modem to the DTE indicating the modem is connected and ready for
operation.
&S, &S0 Forced On. Forces DSR output ON constantly. This is usually used for leased-line applications and
when the DTE requires DSR to always be ON.
&S1
Standard RS232. Modem controls DSR to the DTE. The modem raises DSR when it begins the
handshake process. DSR lowers upon disconnect. The modem is not ready to receive data until
DSR, CTS, and LSD are active.
&S2
Wink When Disconnect. DSR is normally forced ON, but is turned Off for 1 to 2 seconds upon a
disconnect.
&S3
Follows DTR. When the modem receives DTR from the DTE, it sends DSR to the DTE.
&S4
On Early. DSR is low when the modem is in the idle state. DSR goes high immediately upon a
command to enter Data mode. This setting is required for some modem pooling applications.
&S5
Delay to DTE. Operation is similar to the Standard RS232 setting except that DSR does not turn
ON until the modem enters Data mode. Normally, the modem raises DSR when it begins the
handshaking process.
&Tn  Tests
&T, &T0
Abort. Stops any test in progress.
&T1
Local Analog Loop. The modem must be in Direct mode.
&T2
Pattern. Transmits and receives a 511 Bit Error Rate Test (BERT). The modem must be online and in
Direct mode.
&T3
Local Digital Loopback test. The modem must be online and in Direct mode.
&T4
Enables Receive Remote Loopback Response configuration option.
&T5
Disables Receive Remote Loopback Response configuration option.
&T6
Remote Digital Loopback test. The modem must be online and in Direct mode.
&T7
Remote Digital Loopback with Pattern. The modem must be online and in Direct mode.
&T8
Local Loopback with Pattern. The modem must be in Direct mode.
&T9
Self-Test.
To start a test, set the S18 register to a desired test duration in seconds (for example, 30 seconds), and then issue the
&Tn command. Test results display as the number of errors sent or received over the number of blocks sent or received.
&Vn  View Configuration Options
Displays each configuration group within the Active (Operating), Active (Saved), Customer 1, and Customer 2
configuration areas as well as the telephone numbers stores in directory locations 1–10.
&V, &V0
&V1
&V2
&V3
&V4
&V5
Active (Operating) configuration options.
Active (Saved) configuration options.
Customer 1 configuration options.
Customer 2 configuration options.
Directory locations 1–10.
Status of VF line characteristics.
&Wn  Write (Save to Memory)
Saves the current configuration options in Active (Operating) to one of three configuration areas:
&W, &W0 Saved to Active (Saved).
&W1
Saved to Customer 1.
&W2
Saved to Customer 2.
4-12
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Table 4-1
(11 of 14)
3825Plus AT Commands
&Xn  Transmit Clock Source
Determines the source of timing for synchronous data transmitted from the DTE.
&X, &X0 Internal. Modem provides transmit clock source for synchronous data (Pin 15).
&X1
External. Modem derives external transmit clock source provided on Pin 24 for synchronous data.
&X2
Receive Clock Loop. Modem derives transmit clock source from receive signal for synchronous data (Pin 17).
&Zn =x  Store Telephone Numbers
Modem saves the telephone number and dial command modifiers (if any) entered for x (up to 40 characters in length) in
Directory Location n (1–10). The DS command dials numbers stored this way.
For example, the command AT&Z1=5551234 stores the telephone number 555 -1234 into directory location 1.
To clear a telephone number from a memory location, issue the &Zn command without entering a telephone number.
% An  Error Control Fallback Character
This configuration option allows you to enter the ASCII value of the error control fallback character. This provides the
remote modem with the ability to end the error control link negotiating (handshaking) sequence by sending this character.
The modems will connect in Buffer mode (no error control). Online changes do not take effect until a disconnect occurs.
%An
Where n is an ASCII value from 0 to 127. Factory default is 013 (ASCII carriage return).
%Bn, %BLn  Modulation/Data Rate
Sets the modulation and maximum dial VF rate. The same function can be performed with S-register S41; the %B and
%BL commands are provided for compatibility with environments where those commands are used.
The %B300 and %B1200 commands work in conjunction with the B (ITU-T/ Bell Mode) command to determine
modulation.
The %B2400 through %B33600 commands set the modem for V.34 operation, and the %BL2400 through %BL19200
commands set the modem for V.22bis, V.32, V.32bis, or V.32terbo operation.
%B300
%B1200
%B2400
%B4800
%B7200
%B9600
%B12000
%B14400
%B16800
%B19200
%B21600
%B24000
%B26400
%B28800
%B31200
%B33600
%BL2400
%BL4800
%BL7200
%BL9600
%BL12000
%BL14400
%BL16800
%BL19200
V.21 or Bell 103 — max. rate 300 bps
V.22 or Bell 212A — max. rate 1200 bps
V.34 — max. rate 2400 bps
V.34 — max. rate 4800 bps
V.34 — max. rate 7200 bps
V.34 — max. rate 9600 bps
V.34 — max. rate 12,000 bps
V.34 — max. rate 14,400 bps
V.34 — max. rate 16,800 bps
V.34 — max. rate 19,200 bps
V.34 — max. rate 21,600 bps
V.34 — max. rate 24,000bps
V.34 — max. rate 26,400 bps
V.34 — max. rate 28,800 bps
V.34 — max. rate 31,200 bps
V.34 — max. rate 33,600 bps
V.22bis — max. rate 2400 bps
V.32bis/V.32 — max. rate 4800 bps
V.32bis — max. rate 7200 bps
V.32bis/V.32 — max. rate 9600 bps
V.32bis — max. rate 12,000 bps
V.32bis — max. rate 14,400 bps
V.32terbo — max. rate 16,800 bps
V.32terbo — max. rate 19,200 bps
3825-A2-GB30-40
January 1999
4-13
COMSPHERE 3825Plus Modem
Table 4-1
(12 of 14)
3825Plus AT Commands
%Cn  MNP5 Data Compression
Determines if the modem uses MNP Class 5 data compression. It can be set independently of V.42bis data compression.
Online changes do not take effect until a disconnect occurs.
%C, %C0 Disable.
%C1
Enable.
%SA, %SB, %SD, %SP, %SR, %SV  (see Security at the end of this chapter)
+FCLASS=n  Service Class Selection
Normally set by fax software, Service Class Selection determines the fax protocol. The command is sent to the modem in
the format +FCLASS=n, where n can be set to one of three values:
0 = Data
1 = Class 1 Fax (EIA 578)
2 = Class 2 Fax (EIA/TIA SP-2388 dated 20 August 1990)
In the format +FCLASS?, the +FCLASS command returns the current Service Class: 0, 1, or 2. In the format
+FCLASS=?, the +FCLASS command returns the Service Classes available: 0,1,2.
NOTE: Other fax commands supported by the 3825Plus modems are not documented in this manual because they are
not normally issued by the user. They follow the EIA 578 and EIA/TIA SP-2388 specifications.
\An  Maximum Frame Size
Sets the maximum frame size for V.42 and MNP. For V.42, 256 is the maximum value; if a larger value is specified, it will
default to 256. For MNP, the minimum value is 64; if a smaller value is specified, it will default to 64.
\A, \A0
64
\A1
128
\A2
192
\A3
256
\A4
32
\A5
16
&F5 sets this to \A4.
\Cn  Error Control Negotiate Buffer
Determines if the answering modem buffers the data that it received from the remote modem during an interval in which
the modem attempts to establish a connection using error control. Online changes to this configuration option do not take
effect until a disconnect occurs.
\C, \C0
Disable.
\C1
Enable.
\C2
Disable and Switch. Modem automatically switches to Buffer mode if it receives an error control fallback
character (an ASCII carriage return  see %A command) during error control negotiation.
\Dn  CTS Control
Clear-to-Send (CTS) is a signal from the modem to the DTE indicating that it can accept data from the DTE.
\D, \ D0
Forced On. Forces CTS to always ON.
\ D1
Standard RS232.
\ D2
Wink When Disconnect. CTS is turned Off for 1 to 2 seconds upon a disconnect.
\ D3
Follows DTR. The state of CTS follows the state of DTR.
\Gn  Modem to Modem Flow Control
If a modem’s buffers begin to fill due to data it is receiving from the remote modem, but is not passing the data on to the
DTE, it can issue flow control messages to the remote modem. This only applies during Buffer mode connections where
the remote modem also has modem-to-modem flow control enabled. If Error Control mode is enabled, flow control
between the modems will happen automatically, regardless of the setting of this configuration option.
\G, \G0
\G1
4-14
Disable.
Enable.
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Table 4-1
(13 of 14)
3825Plus AT Commands
\Kn  Buffer Control, Send Break Control, Break Forces Escape
The \Kn command sets three configuration options simultaneously:
\K0
\K1
\K2
\K3
\K4
\K5
\K6
Break
Buffer
Control
Discard Data
Discard Data
Keep Data
Keep Data
Keep Data
Keep Data
Discard Break
Send
Break
Control
Break First
Break First
Break First
Break First
Data First
Data First
Not Applicable
Break
Forces
Escape
Enable
Disable
Enable
Disable
Enable
Disable
Disable
BREAK BUFFER CONTROL
Determines if data stored in the modem’s buffer is saved or discarded when the DTE issues a break sequence.
SEND BREAK CONTROL
Determines what is sent from the modem first, data or break if a break sequence is sent from the DTE.
BREAK FORCES ESCAPE
Determines whether or not the modem should enter Command mode when it receives a break character from the DTE.
\Nn  Error Control Mode
Determines the type of error control used by the modem. In most cases, V42/MNPorBfr is the best choice. If V.42bis and
MNP are enabled, then the modem uses the following priority for error control negotiation: V.42bis, V.42, MNP 5 and
below. Online changes do not take effect until a disconnect occurs.
\ N0
\ N1
\ N2
\ N3
\ N4
\ N5
\N6
\N7
Buffer Mode.
Direct Mode.
MNP or Disconnect.
MNP or Buffer.
V.42/MNP or Disconnect.
V.42/MNP or Buffer.
LAPM or Disconnect.
LAPM or Buffer.
If ETC is installed, &F5 and &F6 (Cellular) set this to \N6.
 The \Qn command controls two configuration options simultaneously:
\Q0
\Q1
\Q2
\Q3
\Q4
\Q5
\Q6
Flow Control
of DTE
Disable
XON/XOFF
CTS to DTE
CTS to DTE
XON/XOFF
Disable
Disable
Flow Control
of Modem
Disable
XON/XOFF
Disable
RTS to Modem
Disable
XON/XOFF
RTS to Modem
FLOW CONTROL OF DTE
Determines how the modem controls the flow of data from the DTE.
FLOW CONTROL OF MODEM
Determines how the DTE controls the flow of data from the modem.
3825-A2-GB30-40
January 1999
4-15
COMSPHERE 3825Plus Modem
Table 4-1
(14 of 14)
3825Plus AT Commands
\Tn  No Data Disconnect Timer
Forces the modem to disconnect if no data is transmitted or received within a specified amount of time.
\T, \T0
\Tn
Disable. \T2 is the default for Denmark, and \T3 is the default for France and Germany. See Appendix F.
Where n is a value from 1 to 255 in 1-minute increments.
\ Xn  XON/XOFF Passthrough Flow Control
The way this configuration option functions depends on how the modem is configured for flow control.
When the modem is configured for XON/XOFF flow control (see \Qn, Flow Control of DTE), this configuration option
determines if flow control characters received from the local DTE will be passed on to the remote modem.
If configured for modem-to-modem flow control (see \G – Modem to Modem Flow Control), this configuration option
determines if flow control characters received from the line will be passed on to the DTE.
\X, \ X0
\ X1
4-16
Disable.
Enable.
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
S-Register List
S-registers affect the operating parameters of the
3825Plus modem. These registers are applicable only
when the DTE Dialer Type configuration option is set for
AT. (See &Mn and &Qn commands.)
Table 4-2 lists S-registers supported by the 3825Plus.
Not all S-register values are valid in all countries. See
Appendix F.
S-registers can be displayed and/or modified when the
modem is in Command mode. To display the value of an
S-register, issue the following command:
TYPE:
ATSn?
Where:
n is the register number.
PRESS:
Enter
NOTE
In some countries, the range of
allowable values of some
S-registers is restricted. If the DTE
attempts to enter a restricted
value, the modem answers OK,
but it sets the register to the
nearest allowable value. The DTE
can check the actual value of the
register with the Sn? command.
To modify the value of an S-register, issue the
following command:
TYPE:
ATSn=r
Where:
n is the register number, and r is the new
value.
PRESS:
Enter
Table 4-2
(1 of 10)
3825Plus S-Registers
S0  Auto-Answer Ring Number
Determines the number of rings the modem will count before automatically answering a call.
Enter zero (0) if you do not want the modem to automatically answer any calls. Otherwise, enter a value from 1–255 for
the number of rings to count before answering. Note that if disabled, the modem can only answer with an ATA command.
The factory setting is 1.
NOTE: The default and permitted settings of this option are country-dependent. See Appendix F.
S2  AT Escape Character
Determines ASCII value used for escape sequence (+++) to enter Command mode from Data mode.
Enter a value from 0 to 127 for the escape character. Any value greater than 127 causes the modem to disable the
escape sequence. When the escape sequence is disabled, the modem cannot return to Command mode until the call is
disconnected.
The factory setting is 43 (ASCII + key).
S3  Carriage Return Character
Determines ASCII value used as the carriage return (Enter key). This character is used to end command lines and result
codes.
Enter a value from 0 to 127 for the command end character.
The factory setting is 13 (ASCII carriage return).
NOTE: The &W command used to save this change must be on a separate line. This ensures both that the change is
intentional, and that the DTE can enter the new character.
3825-A2-GB30-40
January 1999
4-17
COMSPHERE 3825Plus Modem
Table 4-2
(2 of 10)
3825Plus S-Registers
S4  Line Feed Character
Determines ASCII value used as the line feed character.
Enter a value from 0–127 for the line feed character.
The factory setting is 10 (ASCII line feed).
S5  Backspace Character
Determines ASCII value used as the backspace (Backspace key). This character moves the cursor to the left and erases
the previous character.
Enter a value from 0–127.
The factory setting is 08 (ASCII backspace).
S6 – Blind Dial Pause
Determines how long (in seconds) the modem waits after going off-hook before dialing a telephone number if using result
code X0, X1, or X3.
Enter a value from 2–255 seconds.
The factory setting is 2 seconds.
NOTE: The default and permitted settings of this option are country-dependent. See Appendix F.
S7 – No Answer Timeout
Determines how long (in seconds) an originating modem waits before abandoning a call when no answer tone is
received.
Enter a value from 1–255 seconds.
The factory setting is 45 seconds.
NOTE: The default and permitted settings of this option are country-dependent. See Appendix F.
S8  ‘‘,” Pause Time for the Dial Modifier
Determines how long (in seconds) the modem pauses when it encounters a comma (,) in the Dial command string.
Enter a value from 0–255 seconds.
The factory setting is 2 seconds.
NOTE: The default and permitted settings of this option are country-dependent. See Appendix F.
S10  No Carrier Disconnect
Determines how long (in tenths of seconds) the modem allows the carrier signal to be Off before disconnecting the call.
Enter a value from 0–254 in 0.1 second increments. A value of 255 disables this register.
The factory setting is 20 (2 seconds).
NOTE: The default and permitted settings of this option are country-dependent. See Appendix F.
S12  Escape Guard Time
Sets the value (in 20-millisecond increments) for the required pause before and after the escape sequence is issued. The
guard time prevents the modem from interpreting data as the escape sequence characters.
Enter a value from 0–255 in 20-millisecond increments. For example, the factory setting of 50 equals 1000 milliseconds or
one second. The factory setting is 50 (1 second).
4-18
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Table 4-2
(3 of 10)
3825Plus S-Registers
S14  Asymmetric Rate Mode
Register determines whether VF rates for transmitting and receiving are identical when using V.34 modulation. Enabling
the function permits the two rates to be different.
Register has the following values:
0 = Enable
1 = Disable
The factory setting is Enable.
S18  Test Timeout
Sets the duration (in seconds) for the modem tests. This automatically cancels any test in progress after the time of this
register expires. Any test can be manually canceled by issuing the escape sequence (+++) followed by the &T0
command.
Enter a value from 0–255 seconds. (A value of 0 disables this register.)
The factory setting is Disable (0).
S26  RTS-to-CTS Delay
Sets the length of time (in 10-millisecond increments) the modem waits after receiving RTS before issuing CTS to the
DTE.
Enter a value from 0–255.
The factory setting is 0 milliseconds.
S38  DTR Continuous Repeat
Determines whether automatic dialing of dial backup directory location 1 will be repeated continuously if unsuccessful, or
halted after the first pass.
NOTE: A lockout from redialing occurs after the number of successive failing call attempts specified in national
regulations. Ten successive attempts are permitted in North America.
Register has the following values:
0=Disable
1=Enable
Factory setting is Disable.
S39  Receive Buffer Disconnect Delay
Determines the maximum amount of time the modem can continue to send data in its Receive Buffer to the DTE after the
modem is commanded by the DTE to disconnect, or after the modem detects a line disconnect.
Register has the following values:
0 = Disable (Immediate disconnect)
1 = 1 second
2 = 2 seconds
D
D
D
D
255 = 255 seconds
3825-A2-GB30-40
January 1999
4-19
COMSPHERE 3825Plus Modem
Table 4-2
(4 of 10)
3825Plus S-Registers
S41  Dial-Line Rate
Determines the modem’s highest data rate and modulation scheme for operation on dial lines. S41 can also be set using
the %B and %BL commands.
Register has the following values (shown in bps):
1 = 14,400 (V.32bis)
2 = 12,000 (V.32bis)
3 = 9600 (V.32bis/V32)
4 = 7200 (V.32bis)
5 = 4800 (V.32bis/V.32)
6 = 2400 (V.22bis)
7 = 1200 (V.22)
8 = 1200 (212A; invalid for UK)
10 = 0–300 (V21)
11 = 0–300 (103J; invalid for UK)
20 = 19,200 (V.32terbo)
21 = 16,800 (V.32terbo)
27 = 33,600 (V.34)
28 = 31,200 (V.34)
29 = 28,800 (V.34)
30 = 26,400 (V.34)
31 = 24,000 (V.34)
32 = 21,600 (V.34)
33 = 19,200 (V.34)
34 = 16,800 (V.34)
35 = 14,400 (V.34)
36 = 12,000 (V.34)
37 = 9600 (V.34)
38 = 7200 (V.34)
39 = 4800 (V.34)
40 = 2400 (V.34)
The factory setting is 33,600 (V.34).
S43  Train Time
Register controls the modem’s train time for V.34, V.32terbo, V.32bis, and V.32 mode.
Register has the following values:
0 = Long (A long train is required for satellite links which have long roundtrip delays.)
1 = Short
The factory setting is Long.
4-20
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Table 4-2
(5 of 10)
3825Plus S-Registers
S44  Leased-Line Rate
Determines the modem’s highest data rate and modulation scheme for operation on 2-wire leased lines in either Answer
or Originate mode.
Register has the following values (shown in bps):
1 = 14,400 (V.32bis)
2 = 12,000 (V.32bis)
3 = 9600 (V.32bis)
4 = 7200 (V.32bis)
5 = 4800 (V.32bis)
6 = 2400 (V.22bis)
18 = 19,200 (V.32terbo)
19 = 16,800 (V.32terbo)
25 = 33,600 (V.34)
26 = 31,200 (V.34)
27 = 28,800 (V.34)
28 = 26,400 (V.34)
29 = 24,000 (V.34)
30 = 21,600 (V.34)
31 = 19,200 (V.34)
32 = 16,800 (V.34)
33 = 14,400 (V.34)
34 = 12,000 (V.34)
35 = 9600 (V.34)
36 = 7200 (V.34)
37 = 4800 (V.34)
38 = 2400 (V.34)
NOTE: Turn your modem off and on after setting S44 for the setting to take effect.
The factory setting is 33,600 (V.34).
S45 – Leased Line Transmit Level
Level determines the modem’s transmit power output level over leased lines.
Enter a value from 0 –15 dBm.
The factory setting is 0 dBm.
NOTE: The default and permitted settings of this option are country-dependent. See Appendix F.
S48  Leased Line Carrier On Level
Determines if the modem disconnects if the carrier signal on leased lines falls below –26 dBm or – 43 dBm.
Register has the following values:
0 = – 43 dBm
1 = –26 dBm
2 = –33 dBm
The factory setting is – 43 dBm.
NOTE: The default and permitted settings of this option are country-dependent. See Appendix F.
3825-A2-GB30-40
January 1999
4-21
COMSPHERE 3825Plus Modem
Table 4-2
(6 of 10)
3825Plus S-Registers
S49  Transmit Buffer Disconnect Delay
Determines the maximum amount of time the modem can continue to send data in its Transmit Buffer to the remote
modem after it is commanded by the DTE to disconnect.
Register has the following values:
0 = Disable (Immediate disconnect)
1 = 1 second
2 = 2 seconds
D
D
D
D
255 = 255 seconds
Factory default is 10 seconds.
S55  Access from Remote
Determines whether the 3825Plus modem’s configuration options can be accessed by a remote 3800 Series modem via
a dial-line or leased-line connection.
Register has the following values:
0 = Enable
1 = Disable
The value of S55 is not affected by factory default templates.
S56  Remote Access Password (Part 1)
Register allows entry of the first pair (leftmost) of digits of a remote access password. Any value from 00 to 99 is valid.
For example, if the remote access password is 12345678, then S56=12.
The value of S56 is not affected by factory default templates.
S57  Remote Access Password (Part 2)
Register allows entry of the second pair of digits of a remote access password. Any value from 00 to 99 is valid.
The value of S57 is not affected by factory default templates.
S58  Remote Access Password (Part 3)
Register allows entry of the third pair of digits of a remote access password. Any value from 00 to 99 is valid.
The value of S58 is not affected by factory default templates.
S59  Remote Access Password (Part 4)
Register allows entry of the fourth pair (rightmost) of digits of a remote access password. Any value from 00 to 99 is valid.
The value of S59 is not affected by factory default templates.
S62  V.25bis Coding
Identifies to the modem the type of coding used by the DTE while in V.25bis HDLC or V.25bis Bisync mode.
Register has the following values:
0 = ASCII
1 = EBCDIC
The factory setting is ASCII.
4-22
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Table 4-2
(7 of 10)
3825Plus S-Registers
S63  V.25bis Idle Character
Identifies to the modem the type of idle fill used by the DTE while in V.25bis HDLC or V.25bis Bisync mode.
Register has the following values:
0 = Mark
1 = Flag
The factory setting is Mark.
S64  V.25bis New Line Character
Identifies to the modem the type of line terminator used by the DTE while in V.25bis Async mode.
Register has the following values:
0 = Carriage Return and Line Feed
1 = Carriage Return
2 = Line Feed
The factory setting is carriage return and line feed (CR + LF).
S65  Line Current Disconnect
Determines if the modem disconnects if an interruption in loop current greater than 8 milliseconds or 90 milliseconds
occurs.
Register has the following values:
0 = Enable (8 msec)
1 = Enable (90 msec)
2 = Disable
The factory setting is Enable (8 msec).
NOTE: The default and permitted settings of this option are country-dependent. See Appendix F.
S66 NMS Call Messages
Register determines if the modem sends information regarding status (Call Progress) and/or sends summarized call
statistics (Call Connect) to the dial network management system (COMSPHERE 6700 Series NMS).
Register has the following values:
0 = Call Connect & Progress
1 = Disable
2 = Call Connect Only
3 = Call Progress Only
The value of S66 is not affected by factory default templates.
S67  (see Security at the end of this chapter)
S68  (see Security at the end of this chapter)
S69  Make Busy Via DTR
Determines if the modem goes off-hook (busy) when DTR is Off. In the UK, the default value cannot be modified.
WARNING: The Make Busy function must be used only when the modem is connected to a PBX.
Register has the following values:
0 = Disable
1 = Enable
The factory setting is Disable.
S70  (see Security at the end of this chapter)
3825-A2-GB30-40
January 1999
4-23
COMSPHERE 3825Plus Modem
Table 4-2
(8 of 10)
3825Plus S-Registers
S74  Network Position Identification
Register identifies each modem as either a control or tributary modem.
Register has the following values:
0 = Tributary
1 = Control
The factory setting is Tributary.
S75  Network Management Address
Register determines the modem’s network address. This address is used when accessing the modem from the NMS.
Enter a value from 0 (network address 001) to 255 (network address 256).
The value of S75 is 255 when the modem is shipped. The value of S75 is not affected by factory default templates.
S76  Autorate (Dial Line)
Determines if the Autorate function is used on dial lines when connected in V.32bis, V.34terbo, or V.34 mode. Autorate
allows the modem to adjust line speed due to varying VF line quality.
Register has the following values:
0 = Enable
1 = Disable
2 = Start at 4800 bps (V.32bis only)
3 = Start at 9600 bps (V.32bis only)
The factory setting is enable.
S77  DTR Alarm Reporting
Register determines whether an alarm is sent to the 6800 Series Network Management System controller when the DTR
signal has been Off for more than 10 seconds.
Register has the following values:
0 = Disable
1 = Enable
The value of S77 is Disable when the modem is shipped. The value of S77 is not affected by factory default templates.
S78  Automode (Dial Line)
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).
If the modem is in a modem pool attached to a System 85 Private Branch Exchange (PBX), S78 should be set to 2. This
modifies parameters used during connection to the PBX.
Register has the following values:
0 = Enable
1 = Disable
2 = System 85
The factory setting is Enable.
4-24
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Table 4-2
(9 of 10)
3825Plus S-Registers
S80  No Data Disconnect Trigger Signal
Register determines whether Pin 2 (transmit data) or Pin 3 (receive data) of the modem’s RS-232 serial interface is
monitored so that the modem can disconnect the call if there is no activity for a certain period. (See the \T command.)
Register has the following values:
0 = Transmit or Receive
1 = Transmit only
2 = Receive only
3 = Transmit and Receive
The factory setting is 3.
S82  Autorate (Leased Line)
Determines if the Autorate function is used on leased lines when connected in V.32bis, V.32terbo, or V.34 mode. Autorate
allows the modem to adjust line speed due to varying VF line quality.
Register has the following values:
0 = Enable
1 = Disable
The factory setting is Enable.
S84  AT Command Mode
Determines how the modem responds to valid and invalid AT commands. The selections No ERROR and No Strap or
ERROR permit installation into applications that are customized for a different modem.
Register has the following values:
0 = Normal.
1 = No ERROR. The modem executes all valid commands, ignores invalid commands, and never issues an ERROR
message.
2 = No Strap or ERROR. The modem ignores all configuration commands, but always issues an OK response message.
The value of S84 is Normal when the modem is shipped. The value of S84 is not affected by factory default templates.
S85  Fast Disconnect
Allows the modem to disconnect immediately after receiving a disconnect command.
Register has the following values:
0 = Disable
1 = Enable
The factory setting is Disable.
S88  Straps When Disconnected
Determines if configuration options in the Active (Saved) configuration area are loaded to Active (Operating) when the
modem disconnects.
Register has the following values:
0 or 231 = No Change
1 or 232 = Reload
The value of S88 is No Change when the modem is shipped. The value of S88 is not affected by factory default
templates.
3825-A2-GB30-40
January 1999
4-25
COMSPHERE 3825Plus Modem
Table 4-2
(10 of 10)
3825Plus S-Registers
S89  V.42 ARQ Window Size Increase
Register allows the V.42 Automatic Request for Transmission (ARQ) window size to be set to a value from 6 to 15 frames
to accommodate satellite delays.
Register has the following values:
0 = Automatic Adjust (6 –15 frames)
1 = 7 frames
2 = 8 frames
3 = 9 frames
D
D
D
D
9 = 15 frames
This command applies only to connections made using V.42bis data compression or V.42 error control.
The factory setting is Automatic Adjust.
S90  DTE Rate = VF Rate
Register forces the DTE (computer) data rate to be equal to the VF (telephone line) data rate.
Register has the following values:
0 = Disable
1 = Enable
The factory setting is Disable.
S91  Cellular Enhancements
Valid only if ETC is installed. Register determines whether parameters are set to improve performance over a cellular link.
Should be enabled when the remote modem is using a cellular connection.
Register has the following values:
0 = Disable
1 = Enable
The factory setting is Disable; &F5 and &F6 set S91 to Enable.
S93  RJ11 Cellular Adapt
Valid only if ETC is installed. Register controls support for an RJ11 connection, including generation of the ETC 1.1
Calling Tone during call origination.
0 = Disable
1 = Enable
The factory setting is Disable.
S94, S95, S96, S97, S98  (see Security at the end of this chapter)
4-26
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Security
Originate Security
Security configuration on the 3825Plus modem is
performed using the AT commands and S-registers in
Table 4-3.
An Originate Access password is entered by a local
user to gain access to a local 3825Plus modem. This
password must be embedded in the AT dial command.
The password must be defined as a DTE_Entry type in the
password table.
Password Types
The following example describes how to enter an
Originate Access security password:
Security in 3825Plus modems is implemented with
three basic types of passwords.
There is one Administration Password which permits
access to the password list and other security
configuration options. When the modem is shipped the
Administration Password is 00000000. The Reset Security
(%SR) command changes the Administration Password to
the value shown on the last page of this manual. It also
can be changed with the Change Administration Password
(%SA=) command.
PRESS:
Enter
Where:
ATD is the AT dial command.
C2C3D2 is the alphanumeric 6-character
Originate Access password on the local
modem.
T is the Tone (DTMF) dial modifier.
18135551234 is the phone number of a
remote modem.
Answer Security
If pulse dialing must be used, the VF password must
still be sent in DTMF tones. This can be done using a
combination of P (pulse) and T (tone) dial modifiers:
DTE passwords alone, or a combination of both VF
and DTE passwords, may be used for Answer Security.
ATDP555-4321TW11223344#
The requirement of the @ (wait for quiet answer) or
W (wait for second dial tone) dial modifier depends on the
value of S-register S95. For more information about dial
modifiers, see the Dial (Dn) command.
DTE passwords are entered by the originating caller
from the DTE keyboard. They may consist of six
characters, and may be a combination of decimal digits 0
through 9 and the letters A through Z (upper or lower
case).
Up to 20 VF and DTE passwords can be stored in the
password table in the memory of the 3825Plus modem.
Each password is indexed by a number, 1 through 20. The
index number is used when displaying or changing a
password.
3825-A2-GB30-40
ATD%C2C3D2%T18135551234
% is the start and stop dial string
command interrupt characters; the
Originate Access password must be
enclosed by these characters.
VF passwords consist of DTMF tones and are entered
by the originating caller using the AT Dial (D) command,
or the keypad of an attached telephone. They must consist
of eight decimal digits, 0 through 9, and are terminated
with the # symbol. For example, if 11223344 is a valid VF
password on the 3825Plus modem at the telephone
number 555-4321, it can be accessed with this command:
ATDT555-4321@11223344#
TYPE:
With VF and DTE Security, modems negotiate VF
password entry before training. If successful, the modems
connect and then prompt the user for a valid DTE
password.
Another combination is called VF with DTE Security.
In this case, the modem will accept as valid only the DTE
password whose password table entry immediately
follows that of the VF password that was received. For
example, if the VF password at index number 9 is used to
connect, the DTE password at index number 10 is the
only valid DTE password.
The command used to add a VF password (%SV or
%SB) determines whether combination security is used.
S-register S68 determines whether VF and DTE Security
or VF with DTE Security is used.
January 1999
4-27
COMSPHERE 3825Plus Modem
Callback Security
VF Only
Callback Security causes the responding modem to
disconnect and call back to the phone number provided by
the user at the originating modem. The user enters the
number, when prompted by the remote modem, as a
Directory location 1–10 preceded by the # sign, or as a
complete telephone number (including the pause and wait
dial modifiers). For example:
Use commands like the following to configure the
modem for VF Only Security.
AT%SA00000000
Provide Administration
Password
AT%SV1=12345678
Store VF password in index
location 1
#1
Directs the remote modem to call back to
the number stored in Directory 1
ATS67=0
Set No Callback Security
#10
Directs the remote modem to call back to
the number stored in Directory 10
ATS68=2
Set VF and DTE Security
ATS70=0
Set No Originate Security
ATS94 to ATS98
(Set to preferred choices)
AT&W
Save settings
ATZ9
Reset modem
9W18005551234
Directs the remote modem to dial 9,
wait for dial tone, and call back to
1-800-555-1234
If an invalid directory or telephone number is entered
but the password is correct, the modem will stay online
but will not conduct a callback sequence. The modem also
will not initiate a callback if no directory or telephone
number is specified.
The user who dials this modem follows the phone
number with a wait dial modifier and the VF password
12345678.
VF and DTE
Security Configuration Examples
The following examples show how a user might set up
Security for several different environments. The examples
show an Administration Password of zero, but this can be
changed with a Security reset (%SR) or a Change
Administration Password command (%SA=).
Use commands like the following to configure the
modem for VF and DTE Security.
AT%SA00000000
Provide Administration
Password
AT%SV1=12345678
Store VF password in index
location 1
AT%SD2=xyz789
Store DTE password in index
location 2
AT%SB3=87654321
Store VF Plus DTE password
in index location 3
ATS67=0
Set No Callback Security
ATS68=2
Set VF and DTE Security
ATS70=0
Set No Originate Security
ATS94 to ATS98
(Set to preferred choices)
AT&W
Save settings
ATZ9
Reset modem
DTE Only
Use commands like the following to configure the
modem for DTE Only Security.
AT%SA00000000
Provide Administration Password
AT%SD1=xyz789
Store DTE password in index
location 1
ATS67=0
Set No Callback Security
ATS68=1
Set DTE Only Security
ATS70=0
Set No Originate Security
ATS94 to ATS98
(Set to preferred choices)
AT&W
Save settings
ATZ9
Reset modem
The user who dials this modem is prompted for a DTE
password. The user responds by typing xyz789.
4-28
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
User A dials this modem by following the phone
number with a wait dial modifier and the VF password
12345678, and is not prompted for a DTE password.
User B dials this modem by following the phone number
with a wait dial modifier and the VF password 87654321,
and is prompted for a DTE password. User B responds by
typing xyz789.
ATS67=1
Set Callback Security
ATS68=1
Set DTE Only Security
ATS70=0
Set No Originate Security
ATS94 to ATS98
(Set to preferred choices)
AT&W
Save settings
Callback
ATZ9
Reset modem
AT%SA00000000
Provide Administration
Password
The user who dials this modem is prompted for
Callback Directory (#1 through #10) or Number (up to
40 digits including the T, P, W, and comma dial
modifiers). Upon callback the user is prompted for the
DTE password, and types C2C3D2.
AT%SD1=C2C3D2
Store DTE password in index
location 1
Table 4-3 the shows the AT commands and S-registers
used to configure security.
Use commands like the following to configure the
modem for Callback Security.
Table 4-3
(1 of 3)
3825Plus Security Commands
%SApppppppp  Enter Administration Password
Permits entry of the Administration Password. This is required before security configuration options and passwords can
be changed. The Administration Password is eight characters long. The default password (active after a %SR command
is issued) is on the last page of this manual. (That page may be removed for security purposes.) The password is
00000000 when the modem is shipped.
%SA=pppppppp  Change Administration Password
Changes the Administration Password. The new Administration Password must be eight characters long and is limited to
the characters 0–9. The new password remains in effect unless security is reset (AT%SR) or another %SA=pppppppp
command is issued.
%SBi =pppppppp  Set Index for VF Plus DTE Password
Changes the VF plus DTE type password in index i to password pppppppp. The new VF password must be eight
characters long and can consist of the characters 0–9. Index may be 1 through 20.
%SDi =pppppp  Set Index for DTE Password
Changes the DTE type password in index i to password pppppp. The new DTE password must be six characters long,
and can consist of the characters 0–9 and a–z. Index may be 1 through 20.
%SPi  Display Password
Displays the VF or DTE password in index i. Index may be 1 through 20.
%SPi =  Delete Password
Deletes the VF or DTE password in index i. Index may be 1 through 20.
%SR  Reset Security
Resets the Administration Password and clears the password table. The security type (S67, S68, S70) is unchanged.
%SVi =pppppppp  Set Index for VF Password
Changes the VF type password in index i to password pppppppp. The new VF password must be eight characters long
and can consist of the characters 0–9. Index may be 1 through 20.
3825-A2-GB30-40
January 1999
4-29
COMSPHERE 3825Plus Modem
Table 4-3
(2 of 3)
3825Plus Security Commands
S67  Callback Security
Determines whether Callback Security is used.
0 = Disable
1 = Enable (not valid if S68=0)
The factory setting is Disable.
S68  Answer Security
Determines whether and which type of Answer Security is used.
0 = No Answer Security
1 = DTE Only
2 = VF and DTE
3 = VF with DTE
The factory setting is No Answer Security.
S70  Originate Security
Determines whether Originate Security is used. If enabled, a DTE password must always be used when originating a call.
0 = Disable
1 = Enable
The factory setting is Disable.
S94  Entry Wait Time
Determines how long the modem will wait for a VF password, a DTE password, or a callback Directory or telephone
number before disconnecting. This S-register affects Answer Security only. The timer is reset for each phase of the
access authorization process.
0 = 10 seconds
1 = 20 seconds
2 = 40 seconds
3 = 60 seconds
The factory setting is 20 seconds.
S95  VF Prompt Type
Determines how the modem prompts the remote dialer to enter a VF password. For Quiet Answer to work, Auto-Answer
Ring Number (S0) must be set to at least 2.
The value of this S-register determines whether the dialer must precede the VF password with the @ or W dial modifier.
0 = Second Dial Tone
1 = Quiet Answer
The factory setting is Second Dial Tone.
S96  DTE Password Entry Attempt Limit
Determines how many attempts to enter a valid DTE password the modem will accept before disconnecting.
0 = 1 attempt
1 = 2 attempts
2 = 3 attempts
3 = 4 attempts
4 = 5 attempts
The factory setting is 1 attempt (no retries).
4-30
January 1999
3825-A2-GB30-40
AT Commands and S-Registers
Table 4-3
(3 of 3)
3825Plus Security Commands
S97  DTE Password Termination Character
Determines ASCII value used to indicate the end of a password or Callback Directory/Number entered by the remote
user.
Enter a value from 1–63 or 123–127 for the command end character.
The factory setting is 13 (ASCII carriage return).
S98  DTE Password Backspace Character
Determines ASCII value used as the backspace (Backspace key) when entering a password or Callback
Directory/Number. This character moves the cursor to the left and erases the previous character.
Enter a value from 1–63 or 123–127.
The factory setting is 08 (ASCII backspace).
3825-A2-GB30-40
January 1999
4-31
COMSPHERE 3825Plus Modem
This page intentionally left blank.
4-32
January 1999
3825-A2-GB30-40
Remote Access
5
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Remote Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Overview
Unlike primary channel communications, the
secondary channel operates at a slower data rate and does
not interrupt data flow.
The Remote Access feature of 3800Plus modems
allows you to change configuration options and control
test functions in a remote 3825Plus modem from any
COMSPHERE 3800, 3800Plus, or 3900 Series modem
with a Diagnostic Control Panel (DCP). Remote DCP
access is only available when using V.34, V.32terbo,
V.32bis, or V.32 modulation schemes.
To access the Remote branch of the COMSPHERE
modem menu structure, make the following selections:
Press the
Remote.
Online : 28.8
<
Control
Remote
Remote Access
F1
The following conditions must be met before using the
Remote Access feature:
• A connection using either the dial network or
leased lines must be established.
F2
F3
To operate over the secondary channel, press any
function key to select the secondary channel.
• The Access from Remote configuration option must
be enabled in the remote 3825Plus modem
(S55 = 0).
• The Remote Access Password configuration option
must be the same for both the local and remote
modems (S56–S59).
Remote DCP access is accomplished using either the
primary or secondary channel of the VF line. Using the
primary channel gives a much faster response time due to
the higher data rate, but it also interrupts data flow
because primary data is stopped when Remote mode is
active. Once Remote mode is terminated, the primary
channel is automatically made available to data
transmission.
3825-A2-GB30-40
key until Remote appears. Select
January 1999
Select Channel
Secondary
F1
F2
>
F3
To operate over the primary channel, press the
key until Prim appears, and press any function key.
Select Channel
Prim (data blckd)
F1
F2
<
F3
5-1
COMSPHERE 3825Plus Modem
The Top-Level menu of the remote 3825Plus modem is
similar to the local COMSPHERE modem with the
following exceptions:
NOTE
If a connection is not established
between a local COMSPHERE
modem and a remote 3825Plus
modem, the LCD displays Remote
Mode Fail – No Circuit. Press any
key to return to the Top Level
menu, and dial again.
• Change Directory is the only function available
under the Call Setup branch.
• Self-Test and Local Analog Loop do not appear
under the Test branch when using the secondary
channel. When using the primary channel, the Test
branch does not appear.
• In the Control branch, Make Busy is not available.
If the remote modem accepts the password and the
entry is successful, the Top-Level menu of the remote
modem appears on the local modem’s LCD. An appears
in the upper right-hand corner indicating that what is
displayed on your LCD is actually the Top-Level menu of
the remote 3825Plus modem.
Online : 28.8
Control
ExitRem
F1
F2
F3
• The Security Branch is not available.
• Exit Remote replaces Remote on the local modem’s
LCD.
To return to local modem operation, select ExitRem.
Any changes made to configuration options while using
the Remote branch are not saved until you exit the
Remote branch.
The following conditions can cause Remote Access to
fail:
• The local modem is not able to communicate with
the remote modem because of a poor dial network
or leased-line connection, or the remote modem is
not a 3825Plus modem. If this is the case, the status
message No Response appears on the LCD.
• If a connection is established but the remote
modem’s Access from Remote configuration option
is disabled, then the status message Access
Disabled appears on the LCD.
• If a connection is established but the wrong
password is stored, the status message Password
Invalid appears on the LCD.
5-2
January 1999
3825-A2-GB30-40
Result Codes
A
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Overview
Table A-1 lists all the result codes 3825Plus modems
may send to the DTE. Result codes can be numeric or
verbal, terse or extended. See the Qn, Vn, and
Xn commands in Chapter 4 for more information.
3825-A2-GB30-40
January 1999
A-1
COMSPHERE 3825Plus Modem
Table A-1
(1 of 3)
Result Codes
Numbers (1)
Numbers (2)
Word
Description
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 or does not detect carrier signal, or
does not detect answer tone
4
4
ERROR
Invalid command
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 (@)
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
15
14
CONNECT 19200**
Connection at 19,200 bps
16
15
CONNECT 7200*
Connection at 7200 bps
*Appears when the Extended Result Codes configuration option is enabled.
**Appears when the Extended Result Codes configuration option is set for Use_DTE_Rate. This displays the DTE data
rate instead of the line rate.
A-2
January 1999
3825-A2-GB30-40
Result Codes
Table A-1
(2 of 3)
Result Codes
Numbers (1)
Numbers (2)
Word
Description
17
17
CONNECT 16800*
Connection at 16,800 bps
19
1
CONNECT 300*
Connection at 300 bps
20
10
CONNECT 2400/ EC***
Connection at 2400 bps with error control
21
11
CONNECT 4800/ EC***
Connection at 4800 bps with error control
22
12
CONNECT 9600/ EC***
Connection at 9600 bps with error control
23
16
CONNECT 12000/ EC***
Connection at 12,000 bps with error control
24
13
CONNECT 14400/ EC***
Connection at 14,400 bps with error control
25
17
CONNECT 16800/ EC***
Connection at 16,800 bps with error control
26
15
CONNECT 7200/ EC***
Connection at 7200 bps with error control
27
5
CONNECT 1200/ EC**
Connection at 1200 bps with error control
28
28
CONNECT 38400**
Connection at 38,400 bps
29
14
CONNECT 19200/ EC***
Connection at 19,200 bps with error control
30
30
CONNECT 57600**
Connection at 57,600 bps
32
32
CONNECT 76800**
Connection at 76,800 bps
34
34
CONNECT 115200**
Connection at 115,200 bps
37
37
CONNECT 21600*
Connection at 21,600 bps
38
38
CONNECT 24000*
Connection at 24,000 bps
39
39
CONNECT 26400*
Connection at 26,400 bps
40
40
CONNECT 28800*
Connection at 28,800 bps
41
41
CONNECT 31200*
Connection at 31,200 bps
42
42
CONNECT 33600*
Connection at 33,600 bps
*Appears when the Extended Result Codes configuration option is enabled.
**Appears when the Extended Result Codes configuration option is set for Use_DTE_Rate. This displays the DTE data
rate instead of the line rate.
*** Appears when the Extended Result Codes configuration option is set for Add/EC. If this configuration option is set for
Add/V42,MNP, then V42b, V42, MNP5, MNP4, MNP3, MNP2, or NoEC appears. For either suffix type, if the
modulation is V.34, /RX=xxxxx/TX=xxxxx is appended showing the VF rates in both directions.
3825-A2-GB30-40
January 1999
A-3
COMSPHERE 3825Plus Modem
Table A-1
(3 of 3)
Result Codes
Numbers (1)
Numbers (2)
Word
Description
43
43
CONNECT 21600/ EC***
Connection at 21,600 bps with error control
44
44
CONNECT 24000/ EC***
Connection at 24,000 bps with error control
45
45
CONNECT 26400/ EC***
Connection at 26,400 bps with error control
46
46
CONNECT 28800/ EC***
Connection at 28,800 bps with error control
47
47
CONNECT 31200/ EC***
Connection at 31,200 bps with error control
48
48
CONNECT 33600/ EC***
Connection at 33,600 bps with error control
77
77
FORBIDDEN
Forbidden number
78
78
DELAYED
Delayed number
*** Appears when the Extended Result Codes configuration option is set for Add/EC. If this configuration option is set for
Add/V42,MNP, then V42b, V42, MNP5, MNP4, MNP3, MNP2, or NoEC appears. For either suffix type, if the
modulation is V.34, /RX=xxxxx/TX=xxxxx is appended showing the VF rates in both directions.
A-4
January 1999
3825-A2-GB30-40
Troubleshooting
B
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Automatic Firmware Download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5
Download Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5
Overview
system by using the process of elimination. If problems
continue to occur, contact your service representative.
This appendix points out basic problems that can occur
when operating a 3825Plus modem. Use Tables B-1
through B-6 to check out these problems. If you are
having data communication difficulties, such as periodic
character loss, random errors, or constant format errors,
use the loopback tests associated with the &T command.
With these tests you can usually isolate the fault in your
If you would like to download the latest 3825Plus
firmware from the Automatic Firmware Download
Center, see the instructions at the end of this chapter. If
you would like to copy the software in your modem to a
remote 3825Plus modem, see the &&P command in
Chapter 4.
Table B-1
Modem Health
Action
Symptom
Modem did not pass
power-up self-test
Contact the Customer Assistance Center (1-800-237-0016).
Power LED does not light
Make sure the modem’s ON/Off switch is in the ON position.
Make sure the ac power transformer is connected to the ac power receptacle.
If the Power LED does not operate, contact the Customer Assistance Center.
A problem is suspected
after the power-up self-test
Perform a self-test using the AT&T9 command.
Perform a local analog loopback with a Pattern test. If the modem consistently registers
errors,
errors contact the Customer Assistance Center.
Center
If the modem passes the above tests and a problem still exists, then the problem is likely
not with your modem.
3825-A2-GB30-40
January 1999
B-1
COMSPHERE 3825Plus Modem
Table B-2
Online Operation
Action
Symptom
Data scrambled or
unreadable
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 DTE.
If using XON/XOFF flow control, verify that the modem’s parity matches the DTE’s parity.
Table B-3
Leased-Line Operation
Action
Symptom
Modems do not train-up on
leased lines
Verify that the correct cabling is used for your application. Refer to Chapter 2 for modem
installation instructions.
Verify that one modem is configured for Answer mode and the other is configured for
Originate mode.
Table B-4
(1 of 3)
Modem – VF Connection
Symptom
Modem does not receive a
dial tone
Action
Attach the telephone directly to the wall outlet to verify that a dial tone exists.
Make sure the VF line is connected to the modem’s rear jack labeled LINE.
Modem does not go
off-hook and answer an
incoming call
Verify that the Auto-Answer Ring Count configuration option (S-register 0) is set to a value
other than 0 (disable).
Verify that the DTE is providing DTR to the modem.
If the DTE does not provide DTR to the modem, verify that the modem’s &D command
(DTR Action configuration option) is set for Ignore (&D0).
Verify that all cables are attached to the correct connectors on the rear of the modem.
Modem goes off-hook,
answers, but does not
connect
Perform a Local Analog Loopback test and verify that data entered at the DTE is echoed
back to the DTE.
Verify that the originating modem is compatible.
Verify that originating modem recognizes your modem’s answer tone.
B-2
January 1999
3825-A2-GB30-40
Troubleshooting
Table B-4
(2 of 3)
Modem – VF Connection
Symptom
Modem goes off-hook,
answers, but does not
connect (continued)
Action
Verify that originating modem supports your modem’s modulation schemes. The 3825Plus
modem recognizes V.34, V.32terbo, V.32bis, V.32, V.22bis, V.22, V.21, Bell 212A, and
Bell 103J. It does not support other vendors’ proprietary modulation schemes.
Use the S41 register to force your modem to operate at the same modulation scheme as
the originating modem.
Originate Mode
Verify that the modem’s DTE Dialer configuration option is set to the correct setting: either
AT, DTR Dialing, V.25bis Async,V.25bis bisync, or V.25bis HDLC.
Modem does not go
off-hook and begin dialing
If using AT Dialing, refer to the Table B-5, Modem – DTE Connection.
If using DTR Dialing, verify the telephone number stored in directory location 1, and verify
that the DTE is raising DTR from Off to ON to initiate a dial.
If using V.25bis Async, verify that the correct character format is set to 7 data bits with even
parity and 1 stop bit, and the carriage return and line feed are used as command
terminators.
If using V.25bis bisync, verify that the correct character format uses two synchronous
control characters and a start-of-text control character before the text block and an
end-of-text control character after the text block.
Modem does not go
off-hook and begin dialing
(continued)
If using V.25bis HDLC, verify that the correct character format uses flag, address, and
control characters before the text block and a frame sequence check and flag after the text
block.
Modem dials but does not
connect
If the modem is operating behind a PBX, verify 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 or Disconnect and the other modem is
configured for no Error Control. Try calling in Buffer mode.
If both modems use V.32bis or V.32 modulation, set the modem’s V.32bis Train
configuration option to Long.
Intermittent disconnects,
high error rates, or
excessive retransmissions
Use the AT &T7 command to perform a remote digital loopback test with pattern test.
Modem connects but sends
ERROR result code to DTE
Your modem may be configured to use security and you are not supplying the proper
passwords. See Security at the end of Chapter 4.
3825-A2-GB30-40
January 1999
B-3
COMSPHERE 3825Plus Modem
Table B-4
(3 of 3)
Modem – VF Connection
Symptom
Modem establishes and
disconnects a call
Action
You may have a poor VF connection. Disconnect and dial again.
The remote modem may have encountered an EC Disconnect, where the modem is
configured to establish a call using error correction.
If the modems cannot negotiate EC, then a disconnect occurs.
The remote modem may be in a forced Error Control mode (disconnect if there is no error
control). Reconfigure your modem to V.42/MNP or Buffer and try again.
Perform a Local Analog Loopback test to check the modem’s hardware operation.
High error rates occur when Incoming rings can cause data errors during a loopback test. Abort the test, disconnect the
running a local loopback or modular VF cord, and restart the test.
self-test
Table B-5
Modem – DTE Connection
Symptom
Modem does not accept or
echo back AT commands
Action
Verify that the cable between the Async port of the DTE and the modem is a standard
RS-232 cable. If the cable is bad, replace it. (Null modem cables, also known as crossover
cables, do not work in this application.)
Reload the Async Dial factory configuration area to guarantee that all configuration options
are returned to their proper setting. Refer to the Recovering AT Commands section in
Chapter 2.
Make sure that all AT commands are terminated with a carriage return.
Verify that the DTE 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.
Verify that the DTE’s data rate is set to a level supported by the modem
(115,200 bps–300 bps).
If using a PC, verify that the modem is attached to the correct communications port.
B-4
January 1999
3825-A2-GB30-40
Troubleshooting
Table B-6
Fax Operation
Symptom
Modem cannot send or
receive a fax
Action
Make sure that your fax software is correctly installed.
Check your fax software to see if there is an Answer mode or Receive Fax setting that must
be enabled.
Sections of your fax are
missing
This often indicates a noisy telephone line or a flow control problem. To resolve the flow
control problem, try using hardware flow control (RTS/CTS). This must be enabled in your
software (refer to the software’s documentation) and set within your modem using the
AT&K3 command (RTS/CTS flow control).
Your fax did not complete,
and your modem displays
result codes in the numeric
format
For some reason your modem and software are no longer communicating, and, as a result,
your modem is stuck in fax mode. Type ATE1V1 and press Enter. The software should
respond with an OK. Try sending or receiving the fax again.
Download Failure
Automatic Firmware
Download
New releases may be available for the 3825Plus
modem. The latest 3825Plus firmware is available at no
charge from the Automatic Firmware Download Center.
Refer to page A in the front of this document for contact
information.
If the download is interrupted, the modem is left in a
state in which it can only be used to receive a call for a
download. The MR/Pwr LED blinks slowly when the
modem is in this state, and the modem will not respond to
AT commands.
If you are unable to complete the download, call your
service representative.
Informational messages are displayed on your DTE
when the modem is connected. These show the amount of
time the download will take.
If the modem connects at 14,400 bps, the download
takes about 10 minutes. When the download is complete,
the modem resets itself.
3825-A2-GB30-40
January 1999
B-5
COMSPHERE 3825Plus Modem
This page intentionally left blank.
B-6
January 1999
3825-A2-GB30-40
Technical Specifications
C
Table C-1
(1 of 2)
Model 3825Plus Technical Specifications
Description
Specifications
APPROVALS
Refer to the label on your modem or contact your local sales representative.
COMPATIBILITY
AND VF DATA RATES
Dial-Line Modulations
ITU-T V.34 (33,600, 31,200, 28,800, 26,400, 24,000, 21,600, 19,200,
16,800,14,400,12,000, 9600, 7200, 4800, 2400 bps)
V.32terbo (19,200, 16,800 bps)
ITU-T V.32bis (14,400, 12,000, 9600, 7200, 4800 bps)
ITU-T V.32 (9600, 4800 bps)
ITU-T V.22bis (2400 bps)
ITU-T V.22 (1200 bps)
ITU-T V.21 (300 bps)
Bell 212A (1200 bps)
Bell 103J (300 bps)
Leased-Line Modulations
ITU-T V.34 (33,600, 31,200, 28,800, 26,400, 24,000, 21,600, 19,200,
16,800, 14,400, 12,000, 9600, 7200, 4800, 2400 bps)
V.32terbo (19,200, 16,800 bps)
ITU-T V.32bis (14,400, 12,000, 9600, 7200, 4800 bps)
ITU-T V.32 (9600, 4800 bps)
ITU-T V.22bis (2400 bps)
Fax Modulations
ITU-T V.17 (14,400, 12,000, 9600, 7200 bps)
ITU-T V.29 (9600, 7200 bps)
ITU-T V.27ter (4800, 2400 bps)
DTE RATES
115,200, 76,800, 57,600, 38,400, 28,800, 19,200, 14,400, 12,000, 9600, 7200, 4800, 2400,
1200, 300 bps
ERROR CONTROL
ITU-T V.42
MNP 4–2
DATA COMPRESSION
ITU-T V.42 bis
MNP Class 5
3825-A2-GB30-40
January 1999
C-1
COMSPHERE 3825Plus Modem
Table C-1
(2 of 2)
Model 3825Plus Technical Specifications
Specifications
Description
ENVIRONMENT
Operating Temperature
32°F (0°C) to 122°F (50°C)
Relative Humidity
5% to 90% (noncondensing)
Shock and Vibration
Withstands normal shipping
Storage Temperature
– 4°F (– 20°C) to 158°F (70°C)
DTE INTERFACE
25-pin D-subminiature
connector
EIA-232-E/ITU-T V.24
AC POWER
REQUIREMENTS
100 Vac ± 10%, 50/60 Hz;
115 Vac ± 10%, 60 Hz;
220 Vac ± 10%, 50 Hz; or
240 Vac ± 10%, 50 Hz
POWER CONSUMPTION
6 watts (typical, including power transformer, speaker off)
DIMENSIONS
Weight
1.3 pounds (0.59 kg) (not including power transformer)
Height
1.25 inches (3.0 cm)
Width
6.0 inches (15 cm)
Depth
8.75 inches (22 cm)
TRANSMIT LEVEL
Dial Line
Permissive (–9 dBm through –32 dBm in 1-dBm increments)
Leased Line
0 through –15 dBm in 1-dBm decrements
VOICE FREQUENCY
LINE REQUIREMENTS
2-wire dial (PSTN) or 2-wire leased line
PSTN INTERFACE
RJ11C Permissive
RJ14C (if connecting a two-line telephone)
PRIVATE LINE
INTERFACE
Single line JM8 using adapter cable
C-2
January 1999
3825-A2-GB30-40
Pin Assignments
D
EIA-232-E Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
JM8 to RJ11 Crossover Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2
EIA-232-E Pin Assignments
Table D-1 lists the EIA-232-E pin assignments for the
modem.
Table D-1
EIA-232-E Pin Assignments
RS-232
Pin
Name
EIA
Circuit
CCITT
Signal
Source
1
—
AA
101
—
2
TXD
BA
103
DTE
Transmit Data
3
RXD
BB
104
DCE
Receive Data
4
RTS
CA
105
DTE
Request-to-Send
5
CTS
CB
106
DCE
Clear-to-Send
6
DSR
CC
107
DCE
Data Set Ready
7
SG
AB
102
—
8
LSD
CF
109
DCE
Line Signal detect
15
TXC
DB
114
DCE
Transmit Clock
17
RXC
DD
115
DCE
Receive Clock
20
DTR
CD
108
DTE
Data Terminal Ready
22
R1
CE
125
DCE
Ring Indicator
24
XTXC
DA
113
DTE
External Clock
3825-A2-GB30-40
Circuit Function
Shield
Signal Ground
January 1999
D-1
COMSPHERE 3825Plus Modem
JM8 to RJ11 Crossover Cable
For 2-wire leased-line connections to a JM8 network
interface, an 8-position to 6-position crossover cable (see
Figure D-1) must be used according to the following FCC
requirements:
‘‘The RJ series of jacks should not be used for
connecting data equipment to nonswitched private line
networks – specifically, the service equivalents of the
pre-divestiture Series 3002 (Category II, Tariff #260)
service. There is a substantial difference in transmit levels
permitted in the private line service and those permitted in
the public switched network. The industry standard is now
an 8-pin keyed modular jack known as the USOC JM8
(Bellcore Technical Reference: TR-EOP-000242, Issue 1,
released May 1985.) When ordering the installation of the
USOC JM8, specify the appropriate wiring options:
1. 2-wire operations
2. 4-wire operations w/o TEK leads
3. 4-wire operations with TEK leads
TEK leads are for loopback purposes.
A 50-pin version is being considered for multiple line
connections.”
A JM8 to RJ11 crossover cable may be ordered (part
number 125-0054-1531).
Figure D-1. Wiring Diagram — 8-Position to 6-Position Crossover Cable
D-2
January 1999
3825-A2-GB30-40
CCITT V.25bis Dialing Commands
and Responses
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Request Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Request with Number Provided (CRN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Request with Stored Memory Address Provided (CRS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Failure Indication (CFI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Delayed Call Indication (DLC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Connecting (CNX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Answer Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Incoming Call (INC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disregard Incoming Call (DIC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect Incoming Call (CIC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program Normal (PRN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Request List of Stored Numbers (RLN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List Stored Number Response (LSN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Command Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valid (VAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Invalid (INV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview
E-1
E-2
E-2
E-2
E-2
E-2
E-2
E-3
E-3
E-3
E-3
E-3
E-3
E-3
E-3
E-4
E-4
E-4
NOTE
CCITT V.25bis is an international dialing protocol that
permits direct and stored number dialing using DTEs in
either Asynchronous,bisynchronous, or HDLC operating
mode. The 3825Plus modem supports V.25bis request and
answer commands that initiate and cancel dialing,
program commands that allow you to create and enter
telephone numbers to memory, and list commands that
display all telephone numbers stored in directory
locations. As commands are entered from the DTE, the
3825Plus modem issues a response to the DTE which
indicates if the call failed or connected, or if the command
is valid or invalid.
The following section discusses those V.25bis
commands supported by the 3825Plus modem and the
responses to those commands. Tables E-1 and E-2 in the
Command Response section list the V.25bis command and
response and the analogous AT command.
3825-A2-GB30-40
E
The 3825Plus modem must be
configured for V.25bis dialing.
Refer to the &Mn or &Qn
commands listed in Chapter 4.
The character format for Asynchronous Dialing mode
is 7 data bits, even parity, and 1 stop bit.
The character format for bisynchronous Dialing mode
is 7 data bits, odd parity, and 1 stop bit.
The character format for HDLC Dialing mode can be
8 data bits, no parity, and 1 stop bit; 7 data bits, odd parity,
and 1 stop bit; or 7 data bits, even parity, and
1 stop bit.
Character format is determined by the DTE. The
modem detects this format when an AT prefix is entered
from the DTE.
January 1999
E-1
COMSPHERE 3825Plus Modem
Call Request Commands
Call Response
Call Request commands are issued from the DTE to
the modem and are responsible for initiating any dial
calls. Call Request commands include Call Request with
Number Provided (CRN), Call Request with Stored
Memory Address Provided (CRS).
A Call Response indicates if the command was
accepted by the modem. Call Response includes Call
Failure Indication (CFI) and Call Connecting (CNX).
Call Failure Indication (CFI)
The CFI response is issued to the DTE if the modem
fails a CRN or CRS command. CFI is similar to the AT
result codes BUSY, NO ANSWER, NO CARRIER, NO
DIALTONE, and ERROR.
Call Request with Number Provided (CRN)
The CRN command dials the telephone number
entered from the DTE. CRN is similar to the ATD
command.
The CFI response format is:
The CRN command format is:
CFIxx
CRNn
Where:
Where:
n is the dial string. The following
characters are permitted:
T
P
0–9
*#ABCD
R
:
, or <
&
= or >
DTMF Dialing
Pulse Dialing
DTMF Tones or Pulse
Dialed Digits
DTMF Tones
Reverse Dial
Wait for Dial Tone
User-Defined Pause
Flash Hook
Delimiters
xx is
ET
NS
CB
RT
AB
NT
FC
Engaged tone
Number not stored
Local DCE busy
Time-out on ring tone
Abort call on time-out
Answer tone not detected
Forbidden call
ET is similar to the Call Failure Messages Busy Signal
and Trunk Busy and the result code BUSY.
NS is similar to the Common Operational Message
Invalid Number and the result code ERROR.
Call Request with Stored
Memory Address Provided (CRS)
CB is similar to the Call Failure Messages Dial Line in
Use and No Dial-Test and the result code ERROR.
The CRS command dials the telephone number stored
in the request directory location. CRS is similar to the
ATDS command.
RT is similar to the Call Failure Message No Answer
Tone and the result code NO CARRIER.
The CRS command format is:
AB is similar to the Call Failure Messages No Dial
Tone and No Dial-DTR and the result code NO
DIALTONE and ERROR.
CRSx
Where:
NT is similar to the Call Failure Message No Quiet
Answer and the result code NO ANSWER.
x is directory location 1–10.
The modem responds to the command with either a
VAL (valid) or INV (invalid) response followed by a call
progress report such as connect (CNX) or failure (CFI).
Delayed Call Indication (DLC)
The DLC response is issued to the DTE if the modem
is not currently allowed to call the number. DLC is similar
to the AT result code DELAYED.
The DLC response format is:
DLCxx
Where:
E-2
January 1999
xx is the delay before the number may be
called, in minutes.
3825-A2-GB30-40
CCITT V.25bis Dialing Commands and Responses
Call Connecting (CNX)
Program Normal (PRN)
The CNX response informs the DTE that the modem
has connected to the remote modem. CNX is similar to the
AT result code CONNECT.
The Program Normal (PRN) command allows the DTE
to enter and store a telephone number to a specific
directory location. PRN is similar to the AT&Z command.
The CNX response format is CNX.
The PRN command format is:
PRNx;n
Call Answer Commands
Where:
Call Answer commands disable or enable the modem’s
AutoAnswer function. These commands are issued from
the DTE. Call Answer commands include Incoming Call
(INC), Disregard Incoming Call (DIC) and Connect
Incoming Call (CIC).
Incoming Call (INC)
The INC response informs the DTE that the modem
has detected a ring tone. At this point, the DTE can issue
the DIC command to disable the modem from answering
the call. INC is similar to the AT result code RING.
x is the directory location 1–10;
n is the telephone number.
Request List of Stored
Numbers (RLN)
The Request List of Stored Numbers (RLN) command
displays telephone numbers stored in the modem’s
directory location. If the RLN command is entered
without specifying a directory location, then all directory
locations and telephone numbers are displayed. If a
directory location is entered, then only that telephone
number is displayed.
The RLN command format is:
Disregard Incoming Call (DIC)
RLN
The DIC command prevents the modem from
answering an incoming call. This command is only valid
once the DTE receives an incoming call (INC) response
from the modem. A DIC must be issued within 5 seconds
after receiving an INC.
which displays all directory locations, or:
RLNx
Where:
x is a directory location.
The DIC command format is DIC.
If DIC is issued within 5 seconds, the modem sends the
VAL response to the DTE. If DIC is issued after
5 seconds, INV is returned.
Connect Incoming Call (CIC)
The CIC command forces the modem to cancel any
DIC commands and answer an incoming call. This
command is only valid when the DTE issues a DIC
command. CIC must be issued within 10 seconds after
sending a DIC. CIC is similar to the ATA command.
List Stored Number
Response (LSN)
LSN is a response to an RLN command issued by the
DTE. If a directory location is specified, then the
telephone number for that location is displayed. If no
directory location is specified, then all telephone numbers
stored in memory are displayed.
The LSN response format is:
LSNx;n
The CIC command format is CIC.
Where:
If CIC is issued within 10 seconds, the modem sends
the VAL response to the DTE. If CIC is issued after
10 seconds, INV is returned.
3825-A2-GB30-40
January 1999
x is the directory location;
n is the telephone number.
E-3
COMSPHERE 3825Plus Modem
Command Response
The INV response format is:
INVxx
A Command Response indicates that the command
entered was a valid or invalid entry. Command Response
includes Valid (VAL) and Invalid (INV).
Where:
CU
MS
PS
PV
Valid (VAL)
The VAL response indicates that the modem has
accepted the V.25bis command issued by the DTE. VAL is
similar to the AT result code OK.
xx is
command unknown
message syntax error
parameter syntax error
parameter value error
Table E-1 lists V.25bis commands supported by the
3825Plus modem.
Invalid (INV)
The INV response indicates that the modem has
received an incorrect V.25bis command from the DTE.
INV is similar to the AT result code ERROR.
Table E-1
V.25bis Commands
Description
V.25bis Command
AT Command/S-Register Equivalent
CALL REQUEST COMMANDS
CRN
Call Request with Number Provided
ATD
CRS
Call Request with Memory Address
ATDS
CALL ANSWER COMMANDS
INC
Incoming Call Indication
RING
DIC
Disregard Incoming Call
NONE
CIC
Connect Incoming Call
ATA
PROGRAM COMMAND
PRN
Program Normal
AT&Z
LIST REQUEST
RLN
E-4
Request to List Stored Number
NONE
January 1999
3825-A2-GB30-40
CCITT V.25bis Dialing Commands and Responses
Table E-2 lists V.25bis response messages supported by
the 3825Plus modem.
Table E-2
V.25bis Response Messages
V.25bis Command
Description
AT Command/Result Code Equivalent
CALL RESPONSE
CFI
Call Failure Indication
BUSY, NO ANSWER, NO CARRIER, NO DIAL TONE, ERROR
CNX
Call Connecting Indication
CONNECT
LIST RESPONSE
LSN
List Stored Number
NONE
COMMAND RESPONSE
VAL
Valid Command
OK
INV
Invalid Command
ERROR
3825-A2-GB30-40
January 1999
E-5
COMSPHERE 3825Plus Modem
E-6
January 1999
3825-A2-GB30-40
Country-Specific Configuration
Options
F
Configuration Options by Country Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1
Configuration Options by
Country Code
If the modem is approved for use in the country,
configuration options for the North America country code
(shown in Table F-2) are valid in:
Tables F-1 and F-2 show configuration options whose
validity or default values vary according to country code.
The abbreviations used in the table are:
• V for Valid
• I for Invalid
• F for Factory Default
Reference to particular country codes in this guide is
not an assurance that the modem has been approved for
use in that country. Consult your sales representative.
Each modem is shipped from the factory with a
specific country code. The ability to change the country
code is not accessible to the user.
3825-A2-GB30-40
January 1999
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Argentina
Bahamas
Bermuda
Bolivia
Brazil
Brunei
Canada
Chile
China
Colombia
Costa Rica
Dominican Republic
Ecuador
Guatemala
Hong Kong
India
Indonesia
Korea
Kuwait
Malaysia
Mexico
Paraguay
Peru
Philippines
Poland
Saudi Arabia
Taiwan
Thailand
United States
Uruguay
Venezuela
F-1
COMSPHERE 3825Plus Modem
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ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
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ÁÁ
ÁÁ
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ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Cyprus
Czechia
Denmark
Eire
Finland
&D0
F
I
F
F
F
F
F
F
Stndrd_RS232
&D1, &D2
V
F
V V V V V V V V V V V
ContrlsOnHook
&D4
V
I
V V V V V V V V V V V
DTR_Tx_Mute
&D5
V
I
V V V V V V V V V V V
Disable
S0=0
V V V V V V V V V V V V V
1
S0=1
F
F
I
I
F
F
I
F
2
S0=2
V V
F
F
V V V V
F
V V V V
—
S0=3
V V V V V V V V
I
V V V V
4
S0=4
V V V V V V V V
I
V V V V
6
S0=6
V
I
I
I
V V V V
I
V V
I
V
8
S0=8
V
I
I
I
V V V V
I
V V
I
V
10
S0=10
V
I
I
I
I
V V V
I
I
V
I
V
Tone
T
F
F
F
F
F
F
F
F
F
F
F
F
Pulse
P
V V V V V
I
V V V V V V V
Enable
X2, X4, X5, X6
F
Disable
X0, X1, X3
2 sec
Auto Answer Ring Number
(S0)
Dialer Type
Dial Tone Detect
(Xn)
Blind Dial Pause
(S6)
F
F
F
Japan
Belgium
Ignore
Italy
Austria
DTR Action
(&Dn)
Israel
AT Command
France
DCP Choice
Germany
Strap Description
Australia
Table F-1
(1 of 5)
Configuration Options by Country (A through M)
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
V V
I
I
V
I
I
V
I
V V V V
S6=2
F
F
F
I
F
F
F
F
I
I
I
I
—
S6=3
V V V V
F
V V V V
F
I
I
I
4 sec
S6=4
V V V V V V V V V V
F
F
F
6 sec
S6=6
I
V V V V V V V V V V V V
8 sec
S6=8
I
V V V V V V V V V V V V
10 sec
S6=10
I
V V V
I
V V V V
I
I
V V
20 sec
S6=20
I
V V V
I
V V V V
I
I
I
F
F
F
F
V
V= Valid
I = Invalid
F = Factory Default
F-2
January 1999
3825-A2-GB30-40
Country-Specific Configuration Options
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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Japan
F
Italy
F
Israel
F
France
F
Germany
F
Finland
F
Eire
Cyprus
F
Czechia
Belgium
F
Denmark
Australia
Austria
Table F-1
(2 of 5)
Configuration Options by Country (A through M)
F
F
F
F
F
Strap Description
DCP Choice
AT Command
“,” Pause Time
(S8)
2 sec
S8=2
4 sec to
20 sec
S8=4 to S8=20
V V V V V V V V V V V V V
—
S8=0
V V V V V V V V V V V V V
30 sec
S7=30
V
I
I
V
I
I
V V
I
I
I
I
I
—
S7=40
V
I
I
V
I
I
F
V
I
I
I
I
I
45 sec
S7=45
F
I
F
F
I
I
I
F
I
I
I
I
F
60 sec
S7=60
I
F
V V
F
F
I
V
I
F
F
F
I
—
S7=90
I
V
I
V
I
I
I
I
I
I
I
I
I
120 sec
S7=120
I
I
I
I
I
I
I
I
I
I
I
I
I
—
S7=135
I
I
I
I
I
I
I
I
F
I
I
I
I
Enab (>8 msec)
S65=0
I
I
I
I
I
I
I
I
I
I
I
I
I
Enab (>90 msec)
S65=1
F
F
F
F
F
F
F
F
I
F
F
F
F
Disable
S65=2
V V V V V V V V
F
V V V V
2 sec
S10=20
F
F
F
5 sec
S10=50
V V V V V V V V V V V V V
10 sec
S10=100
V V V V V V V V V V V V V
20 sec
S10=200
V V
I
V
I
I
V V V
I
V V V
Disable
S10=255
V
I
I
I
I
I
I
V
No Answer Timeout
(S7)
Line Crnt Disc
(S65)
No Carrier Disc
(S10)
F
I
F
F
F
F
F
F
I
I
F
F
I
F
V
V= Valid
I = Invalid
F = Factory Default
3825-A2-GB30-40
January 1999
F-3
COMSPHERE 3825Plus Modem
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Germany
Japan
Italy
Israel
V V V V V V V
France
F
Finland
Eire
Czechia
Denmark
Cyprus
Belgium
Australia
Austria
Table F-1
(3 of 5)
Configuration Options by Country (A through M)
Strap Description
DCP Choice
AT Command
No Data Disc
(\Tn)
—
\T2
V V V V V
—
\T3
V
10 min
\T10
V V V V V V V V V V V V V
30 min
\T30
V V V V V V V V V V V V V
60 min
\T60
V V V V V V V V V V V V V
Disable
\T0
F
F
V
V V V V V V
F
F
F
V
F
F
F
F
V V
V V V
F
F
F
V= Valid
I = Invalid
F = Factory Default
F-4
January 1999
3825-A2-GB30-40
Country-Specific Configuration Options
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁÁÁ
ÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Strap Description
DCP Choice
AT Command
Australia
Austria
Belgium
Cyprus
Czechia
Denmark
Eire
Finland
France
Germany
Israel
Italy
Japan
Table F-1
(4 of 5)
Configuration Options by Country (A through M)
Dial TX Level
(&In, &Jn)
PERMISSV (–9)
&J0
I
I
I
I
I
I
I
I
I
I
I
I
I
0 dBm
&I0
I
I
I
I
I
I
I
I
I
I
I
I
I
–1 to –4 dBm
&I1 to &I4
V
I
V V V V V V
I
V V V V
–5 dBm
&I5
V
I
V V V V V V
I
V V
–6 dBm
&I6
V
I
V V V V V V
I
V V V V
–7 dBm
&I7
V
I
F
I
V V V V
–8 dBm
&I8
V
I
V V V V V V V V V V V
–9 dBm
&I9
V
F
V V V V V V V V V V V
–10 dBm
&I10
F
I
V
–11 dBm
&I11
V
I
V V V
–12 to –13 dBm
&I12 to &I13
V
I
V V V V V V V V V V V
–14 dBm
&I14
V
I
V V V V V V V V V V V
–15 dBm
&I15
V
I
V V V V V V V V V V
F
–16 to –32 dBm
&I16 to &I32
I
I
I
I
I
I
I
I
I
I
I
I
I
ETC1.0
&I99
I
I
I
I
I
I
I
I
I
I
I
I
I
ETC1.1
&I100
I
I
I
I
I
I
I
I
I
I
I
I
I
Disable
&G0
F
F
I
F
F
F
F
F
I
F
F
F
F
550Hz
&G1
V V
I
V V V V V
I
V V V V
1800Hz
&G2
V V
F
V V V V V
F
V V V V
V22b Guard Tone
(&Gn)
V V V
F
F
F
V
F
F
V V V V V
F
F
V
V V V
V
F
F
V V
V= Valid
I = Invalid
F = Factory Default
3825-A2-GB30-40
January 1999
F-5
COMSPHERE 3825Plus Modem
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Á
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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Cyprus
Czechia
Denmark
Eire
Finland
S45=0
I
I
I
I
I
I
I
I
–1 dBm
S45=1
V
I
V V V V
I
V V V V V V
–2 to –5 dBm
S45=2 to S45=5
V
I
V V V V
I
V V V V V V
–6 dBm
S45=6
V
I
V V V V
I
V V V V V V
–7 dBm
S45=7
V
I
F
V V V
I
V V V V V V
–8 dBm
S45=8
V
I
V V V V
I
V V V V
–9 dBm
S45=9
V
I
V V V V
I
V V V V V V
–10 dBm
S45=10
F
F
V
I
V V V V V V
–11 dBm
S45=11
V V V V V
F
I
F
V V V V V
–12 dBm
S45=12
V V V V V V
I
V
F
–13 dBm
S45=13
V V V V V V
F
V V V
–14 dBm
S45=14
V V V V V V V V V V V V V
–15 dBm
S45=15
V V V V
F
V V V V
F
V V
F
–16 to –32 dBm
S45=16 to S45=32
I
I
I
I
I
I
I
I
I
I
I
I
I
–43 dBm
S48=0
F
F
F
V
F
F
F
F
V
F
F
F
F
–33 dBm
S48=2
V V V V V V V V V V V V V
–26 dBm
S48=1
V V V
Carrier On Level
(S48)
F
F
V V
V V V V
Japan
Belgium
0 dBm
Italy
Australia
Leased TX Level
(S45)
Israel
AT Command
France
DCP Choice
Germany
Strap Description
Austria
Table F-1
(5 of 5)
Configuration Options by Country (A through M)
I
I
I
I
I
F
F
V
V V V V
F
V V
V V V V
V= Valid
I = Invalid
F = Factory Default
F-6
January 1999
3825-A2-GB30-40
Country-Specific Configuration Options
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ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Portugal
South Africa
Spain
Sweden
Switzerland
Thailand
Turkey
United Kingdom
F
F
F
F
F
F
Norway
F
AT Command
North America
F
DCP Choice
New Zealand
F
Strap Description
Netherlands
Singapore
Table F-2
(1 of 5)
Configuration Options by Country (N through Z)
DTR Action
(&Dn)
Ignore
&D0
F
F
F
F
Stndrd_RS232
&D1, &D2
V V V V V V V V V V V V V
ContrlsOnHook
&D4
V V V V V V V V V V V V V
DTR_Tx_Mute
&D5
V V V V V V V V V V V V V
Disable
S0=0
V V V V V V V V V V V V V
1
S0=1
F
I
F
F
F
F
I
F
2
S0=2
V
F
V V V V V
I
V
I
V V V
—
S0=3
I
I
V V V V V
I
V
F
V V V
4
S0=4
I
I
V V V V V
I
V
I
V V V
6
S0=6
I
I
V V V V V
I
V
I
V V V
8
S0=8
I
I
V V V V V
I
V
I
V V V
10
S0=10
I
I
V
I
V V V
I
V
I
V V V
Tone
T
F
F
F
F
F
F
F
F
F
Pulse
P
V V V
I
V V V V
I
V V V V
Enable
X2, X4, X5, X6
F
F
F
F
F
F
F
F
F
F
F
Disable
X0, X1, X3
I
V V
I
I
V V
I
I
I
V V V
2 sec
S6=2
F
F
F
F
F
I
F
F
F
F
I
I
3 sec
S6=3
V V V V V V
I
V V V V
I
I
4 sec
S6=4
V V V V V V
F
V V V V
F
F
6 sec
S6=6
V V V V V V V V V V V V V
8 sec
S6=8
V V V V V V V V V V V V V
10 sec
S6=10
V V V V V V
I
V V V V V
I
20 sec
S6=20
V
I
V V V V V
I
Auto Answer Ring Number
(S0)
Dialer Type
Dial Tone Detect
(Xn)
Blind Dial Pause
(S6)
I
F
F
F
F
F
V V V V
F
F
F
F
F
F
F
V= Valid
I = Invalid
F = Factory Default
3825-A2-GB30-40
January 1999
F-7
COMSPHERE 3825Plus Modem
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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ÁÁÁÁÁÁÁÁÁ
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ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Spain
Sweden
Switzerland
Thailand
Turkey
United Kingdom
F
F
F
S8=4 to S8=20
V V V V V V V V
I
V V V V
—
S8=0
V V V V V V V V
F
V V V V
30 sec
S7=30
I
V V V V V
I
V V
I
V V
I
—
S7=40
I
V V V V V
I
V V
I
V V
I
45 sec
S7=45
I
F
F
I
F
F
I
F
F
I
60 sec
S7=60
F
V V V V V
F
V V
I
V V
F
—
S7=90
I
I
V V V V
I
V
I
F
V V
I
120 sec
S7=120
I
I
V
I
I
V
I
I
I
I
V V
I
—
S7=135
I
I
V
I
I
V
I
I
I
I
V V
I
Enab (>8 msec)
S65=0
I
I
F
I
I
I
I
I
I
I
F
I
I
Enab (>90 msec)
S65=1
F
F
V
I
F
F
F
F
F
F
V
F
F
Disable
S65=2
V V V
F
V V V V V V V V V
2 sec
S10=20
F
F
F
5 sec
S10=50
V V V V V V V V V V V V V
10 sec
S10=100
V V V V V V V V V V V V V
20 sec
S10=200
V V V V V V V V V V V V V
Disable
S10=255
I
Portugal
Singapore
F
Norway
I
AT Command
North America
F
DCP Choice
New Zealand
F
Strap Description
Netherlands
South Africa
Table F-2
(2 of 5)
Configuration Options by Country (N through Z)
“,” Pause Time
(S8)
2 sec
S8=2
F
F
F
F
F
4 sec to 20 sec
No
Answer Timeout
((S7))
Line Crnt Disc
(S65)
No Carrier Disc
(S10)
F
F
F
V V
F
I
F
I
F
F
F
V V
F
I
F
F
F
F
F
V V V V V
V= Valid
I = Invalid
F = Factory Default
F-8
January 1999
3825-A2-GB30-40
Country-Specific Configuration Options
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
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ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
United Kingdom
Thailand
F
V V V V V
Turkey
Sweden
Switzerland
Spain
South Africa
Portugal
Singapore
Norway
North America
New Zealand
Netherlands
Table F-2
(3 of 5)
Configuration Options by Country (N through Z)
Strap Description
DCP Choice
AT Command
No Data Disc
(\Tn)
—
\T2
V V V V V V V
—
\T3
V V V V V V V V V V V V V
10 min
\T10
V V V V V V V V V V V V V
30 min
\T30
V V V V V V V V V V V V V
60 min
\T60
V V V V V V V V V V V V V
Disable
\T0
F
F
F
F
F
F
F
V
F
F
F
F
F
V= Valid
I = Invalid
F = Factory Default
3825-A2-GB30-40
January 1999
F-9
COMSPHERE 3825Plus Modem
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Strap Description
DCP Choice
AT Command
Netherlands
New Zealand
North America
Norway
Portugal
Singapore
South Africa
Spain
Sweden
Switzerland
Thailand
Turkey
United Kingdom
Table F-2
(4 of 5)
Configuration Options by Country (N through Z)
Dial TX Level
(&In, &Jn)
PERMISSV (–9)
&J0
I
I
F
I
I
I
I
I
I
I
F
I
I
0 dBm
&I0
I
I
I
I
I
I
I
I
I
I
I
I
V
–1 to –4 dBm
&I1 to &I4
V V
I
V V
I
I
V V V
I
V V
–5 dBm
&I5
V V
I
V V
I
I
V V V
I
V V
–6 dBm
&I6
V V
I
V V
I
V V V V
I
V V
–7 dBm
&I7
V V
I
V
F
I
V V V V
I
V V
–8 dBm
&I8
V V
I
V V
I
V V V V
I
V V
–9 dBm
&I9
V V
I
V V
I
V V V
I
F
–10 dBm
&I10
F
F
F
F
–11 dBm
&I11
V V V V V V V
–12 to –13 dBm
&I12 to &I13
–14 dBm
&I14
V
–15 dBm
&I15
V V V V V V V V V V V V V
–16 to –32 dBm
&I16 to &I32
I
I
V
I
I
I
I
I
I
I
V
I
I
ETC1.0
&I99
I
I
V
I
I
I
I
I
I
I
I
I
I
ETC1.1
&I100
I
I
V
I
I
I
I
I
I
I
I
I
I
Disable
&G0
F
F
F
F
F
F
F
F
F
I
F
F
F
550Hz
&G1
V V V V V V V V V
I
V V V
1800Hz
&G2
V V V V V V V V V
F
V V V
V22b Guard Tone
(&Gn)
V V
V
F
F
V V V V V V
F
V V V V V
V V V V V V V V V V V V V
F
V V V V V V
F
V V V V
V= Valid
I = Invalid
F = Factory Default
F-10
January 1999
3825-A2-GB30-40
Country-Specific Configuration Options
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
Á
ÁÁ
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
ÁÁ
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Strap Description
DCP Choice
AT Command
Netherlands
New Zealand
North America
Norway
Portugal
Singapore
South Africa
Spain
Sweden
Switzerland
Thailand
Turkey
United Kingdom
Table F-2
(5 of 5)
Configuration Options by Country (N through Z)
Leased TX Level
(S45)
0 dBm
S45=0
I
I
F
I
I
I
I
I
I
I
F
I
I
–1 dBm
S45=1
V V V
I
V
I
V V V V V
F
V
–2 to –5 dBm
S45=2 to S45=5
V V V
I
V
I
V V V V V V V
–6 dBm
S45=6
V V V
I
V
I
V
–7 dBm
S45=7
V V V
I
F
F
V V V V V V V
–8 dBm
S45=8
V V V
I
V V V V V V V V V
–9 dBm
S45=9
V V V
I
V V V V V
F
–10 dBm
S45=10
F
F
V V V V
V V V V
–11 dBm
S45=11
V V V V V V V V V V V V V
–12 dBm
S45=12
V V V V V V V V V V V V V
–13 dBm
S45=13
V V V V V V
–14 dBm
S45=14
V V V V V V V V V V V V V
–15 dBm
S45=15
V
F
V V V V V V V V V V V
–16 to –32 dBm
S45=16 to S45=32
I
I
I
I
I
I
I
I
I
I
V
I
I
–43 dBm
S48=0
F
F
F
F
F
F
F
F
F
F
F
F
F
–33 dBm
S48=2
V V V V V V V V V V V V V
–26 dBm
S48=1
V V V V V V V V V V V V V
Carrier On Level
(S48)
V V
F
F
V V V V V
F
V V V
V V V V V
F
V= Valid
I = Invalid
F = Factory Default
3825-A2-GB30-40
January 1999
F-11
COMSPHERE 3825Plus Modem
This page intentionally left blank.
F-12
January 1999
3825-A2-GB30-40
Glossary
Active (Operating)
A configuration area containing configuration options currently in use by the modem. When a
power cycle occurs, a reset is performed, or a save is issued, this area is updated with the contents
of Active (Saved).
Active (Saved)
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 loop
See local analog loop.
analog signal
A type of signal composed of continuously variable values, used to transmit voice or 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.
ASCII
This code (American Standard Code for Information Interchange) is a 7-bit code which
establishes compatibility between data services. ASCII is the standard for data transmission over
telephone lines. The ASCII code consists of 32 control characters (nondisplayed) and
96 displayed characters.
asymmetric rate
In V.34, the ability of a device to transmit at a different rate than it receives.
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 DTE, that allow control of the modem while
in Command mode. All commands must begin with the characters AT and end with a carriage
return.
AT prefix
A prefix issued before every AT command (except A/ and +++) which identifies the DTE’s data
rate, parity, and character length.
autobaud
To automatically determine the asynchronous DTE data rate.
automatic answer
A capability to respond to a call received over a dial line.
3825-A2-GB30-40
January 1999
Glossary-1
COMSPHERE 3825Plus Modem
automode
To change modulations or rates within a modulation when modems first connect. A modem may
automode to a different modulation than what it is configured for due to the limitations of the
remote modem, or automode to a lower rate due to unfavorable VF line conditions during
connection.
autorate
To adjust to varying VF line conditions by changing the data rate to a higher or lower rate after
connection. The lowest rate the modem autorates to is 4800 bps; the highest possible rate depends
on the modulation the modems connected with. In V.34, the modems may autorate
asymmetrically.
baud
A unit of signaling speed that is equal to the number of symbols per second. This is not
necessarily the same as bits per second, although the terms are frequently interchanged.
Bisync
Binary Synchronous Communications. An IBM communications protocol that has become an
industry standard. It uses a defined set of control characters and control character sequences for
synchronized transmission of binary-coded data between stations in a data communications
system.
bit
A contraction of binary digit. A bit, which is the smallest unit of information, represents a one or
a zero (sometimes called mark or space).
bps
Bits per second. Indicates the speed at which bits are transmitted across a data connection.
buffer
A storage device used to compensate for differences in the data flow rate when transmitting data
from one device to another.
byte
A sequence of successive bits (usually eight) handled as a unit in data transmission.
CCITT
An advisory committee (Consultative Committee on International Telephone and Telegraph)
established by the United Nations to recommend communications standards and policies. Now
called ITU-T.
character
A letter, figure, number, punctuation, or other symbols.
character echo
A way to check the accuracy of data transmission by sending (displaying) all the characters being
transmitted to the monitor.
Class 1 fax
A fax modem standard. Under Class 1 computer software handles most of the protocol,
compression, and conversion tasks.
Class 2 fax
A fax modem standard. Under Class 2 the modem handles most of the protocol, compression, and
conversion tasks as well as modulation, leaving the computer free for other work.
command line
Contains the command(s) instructing the modem to perform a function. Command lines begin
with the AT prefix (unless disabled), and are executed when you press the Return key.
Command mode
One of two general modem operating modes. When in Command mode, the modem accepts
commands instead of transmitting or receiving data.
configuration option
Modem software that sets specific operating parameters for the modem. Sometimes referred to as
straps.
connector
An outlet on equipment and cables that provides a connection.
CSA
Canadian Standards Association.
CTS
Clear to Send. A signal indicating that the modem is ready for the DTE to transmit data.
Glossary-2
January 1999
3825-A2-GB30-40
Glossary
Customer 1
A user-defined configuration area containing customized configuration options for a specific
application.
Customer 2
A user-defined configuration area containing customized configuration options for a specific
application.
data bank
An area within the modem used to store the modem’s firmware.
data carrier
A continuous frequency signal that can be modulated by another signal that contains information
to be transmitted.
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.
Data mode
One of two general modem operating modes. When in Data mode, the modem transmits and
receives data instead of accepting commands.
DB-25 connector
A 25-pin connector that is used to connect a cable which enables communications between two
devices.
dBm
A decibel referenced to one milliwatt into 600 ohms. This unit measures relative signal power.
DCE
The equipment (Data Communications Equipment or Data Circuit Terminating Equipment) that
provides the functions required to establish, maintain, and end a connection. This equipment also
provides the signal conversion required for communication between the DTE and the telephone
line. A modem is a DCE.
DCP
Diagnostic Control Panel. The front panel of modems such as the 3810Plus, or the shared
controller of nest-mount modems such as the 3811Plus. The DCP permits control and
configuration of local and remote modems.
demodulation
The process of recovering data from a modulated carrier wave.
dial command modifiers
A modifier used in the dial string that instructs the modem how to process a dialed telephone
number.
dial line
A communications circuit that is established by a switched circuit connection in the dial network.
dial network
See PSTN.
dial string
A series of characters that consists of numbers and modifiers used to dial a telephone number.
digital signal
A signal composed of only two discrete values, representing the binary digits 0 and 1.
directory location
Nonvolatile memory that stores up to ten telephone numbers. Each directory location can have up
to 40 characters entered.
DOC
Canadian Department of Communication.
download
A process that transfers modem firmware from a locally attached PC to a modem or allows the
cloning of firmware from a local modem to a remote modem. Also, the process of moving data
from a host computer to an attached computer.
DTE
Data Terminal Equipment. The equipment, such as a computer or terminal, that provides data in
the form of digital signals for transmission.
3825-A2-GB30-40
January 1999
Glossary-3
COMSPHERE 3825Plus Modem
DTMF
Dual Tone Multi-Frequency. DTMF tones are the sounds produced by pressing the keys of a
Touch Tone phone, or by dialing a number with a modem using the ATDTn command.
EIA
Electronic Industries Association. This organization provides standards for the data
communications industry.
EIA-232-E
An Electronic Industries Association’s standard defining the 25-position interface between data
terminal equipment and data communications equipment.
EIA RS-366-A
An Electronic Industries Association’s standard defining the 25-position interface between data
terminal equipment and data communications automatic calling equipment.
EPROM
Erasable programmable read-only memory.
error control
An algorithm used to 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 DTE after executing or trying to execute a command.
fax modem
A modem capable of emulating some features of a fax machine. Working under the control of fax
software, a fax modem can communicate with a fax machine or with another fax modem.
fax software
A program or system of programs installed on a computer that allow a fax modem to send and
receive facsimile images.
FCC
Federal Communications Commission. Board of Commissioners that regulates all interstate and
foreign electrical communication systems that originate from the United States.
full-duplex
Simultaneous, two-way communications.
Group III
A fax standard that specifies a rate of transmission of about one page per minute.
half-duplex
Two-way data communications allowed in only one direction at a time.
handshaking
The exchange of predetermined codes and signals (tones) to establish a connection between two
modems.
HDLC
High-level Data Link Control. A communications protocol defined by ISO.
host
A computer attached to a network that shares its information and devices with the rest of the
network.
Hz
A unit of frequency (hertz) that equals one cycle per second.
ISO
International Organization for Standardization.
ITU-T
The Telecommunications Standardization Sector of the International Telecommunications Union,
an advisory committee established by the United Nations to recommend communications
standards and policies. Before March 1993 it was called CCITT.
JM8
A jack used for leased-line networks. Pins 1 and 2 are the transmit pair and Pins 7 and 8 are the
receive pair.
LCD
Liquid Crystal Display. The device that permits text to be displayed on the DCP.
Glossary-4
January 1999
3825-A2-GB30-40
Glossary
leased line
A private line connection exclusively for the user. No dialing is necessary.
LED
Light-Emitting Diode. A light or status indicator on the DCP that glows in response to the
presence of a certain condition (e.g., Alrm).
local analog loopback
The modem’s transmit VF signal is looped to its receiver.
long space disconnect
A disconnect can occur if the modem receives an extended space from a remote modem; for
example, when a remote modem is commanded to disconnect, it transmits a continuous space to
the modem before disconnecting.
loopback test
Any test that verifies a device’s integrity by connecting the device’s output of one direction to the
device’s input of the other direction, then checking the received signal for errors.
LSD
Line Signal Detect. A signal between the DTE and modem indicating energy exists on the
transmission circuit.
MNP
This protocol (Microcom Networking Protocol) detects and corrects data errors caused by
telephone line noise and signal distortion. MNP5 includes data compression.
modem
MOdulator/DEModulator. A device that transforms signals from digital to analog form and vice
versa.
modulation
The process of varying some characteristics (usually amplitude, frequency, and/or phase) of a
carrier wave to form data transmissions.
off-hook
A telephone or modem is being used.
on-hook
A telephone or modem is not being used.
Originate mode
The modem is in a state where it is ready to transmit a call. In a dial network, it is the modem that
makes the call. In a leased-line network, it is one of two sides of the network that is selected to be
the originating modem.
parity
A way of checking data accuracy by counting the number of bits that have a value of one.
PBX
Telephone switching equipment (Private Branch Exchange) dedicated to one customer. A PBX
connects private telephones to each other and to the public dial network.
permissive interface
A dial modem operating mode characterized by a fixed output power level of –9 dBm. It is one of
two possible modes of operation for modems connected to dial lines (see programmable
interface).
power-up self-test
A test that checks most hardware components when the modem is powered-on.
product code
A three-digit code indicating the modem’s highest VF data rate.
programmable interface
A dial modem operating mode characterized by an output power level (–12 to 0 dBm) set by a
programming resistor in the jack. It is one of two possible modes of operation for modems
connected to dial lines (see permissive interface).
protocol
The rules for timing, format, error control, and flow control during data transmission.
PSTN
Public Switched Telephone Network. A network shared among many users who can use
telephones to establish connections between two points. Also known as dial network.
pulse dialing
One of two dialing methods, in which telephone numbers are sent as pulses (brief changes in
voltage or current intensity) across the telephone line. Rotary telephones use pulse dialing.
3825-A2-GB30-40
January 1999
Glossary-5
COMSPHERE 3825Plus Modem
register
A part of the modem’s memory that contains values that determine the modem’s operating
characteristics.
remote loopback
A test that sends a signal to the remote modem to test the local modem, the remote modem, and
the circuit between them.
result code
An asynchronous message (in either numbers or words) that the modem sends to the DTE after
executing or trying to execute a command.
RJ11
A type of 6-position jack normally used with permissive dial networks and telephone sets.
rotary
A TELCO service whereby multiple lines to a customer premise share a common telephone
number.
serial transmission
A way of transmitting data in which bits are sent sequentially one at a time.
S-registers
Registers that contain information affecting modem operation. S-register commands must be
preceded by the AT prefix.
Sync Dial
A factory preset configuration area containing configuration options most often used in
synchronous dial networks.
synchronous transmission
Data transmission that is synchronized by timing signals. Characters are sent at a fixed rate. This
type of transmission is more efficient than asynchronous transmission.
tone dialing
One of two dialing methods, in which telephone numbers are sent as tones across the telephone
lines.
training
A process where two modems try to establish a connection over the VF line.
UL
Underwriter’s Laboratories, Inc.
UNIX Dial
A factory preset configuration area containing the configuration options most often used in a
UNIX dial network.
USOC
Universal Service Ordering Codes.
V.17
A fax communications standard for modems operating half-duplex with synchronous data at
14,400 bps.
V.22
A standard for modems operation full-duplex with asynchronous or synchronous data at 1200 bps
over the dial network (PSTN).
V.22bis
A standard for modems operating full-duplex with asynchronous or synchronous data at 1200 or
2400 bps over the dial network (PSTN).
V.25bis
A dialing protocol that permits direct and stored-number dialing in asynchronous, bisynchronous,
or HDLC modes.
V.27ter
A fax communications standard for modems operating half-duplex with synchronous data at 2400
and 4800 bps.
V.29
A fax communications standard for modems operating half-duplex with synchronous data at 7200
and 9600 bps.
V.32
A standard for modems operating full-duplex with asynchronous or synchronous data at 4800 or
9600 bps on switched (dial) or leased telephone lines.
Glossary-6
January 1999
3825-A2-GB30-40
Glossary
V.32bis
A standard for modems operating full-duplex with asynchronous or synchronous data over dial
networks (PSTN) or leased lines at 14,400, 12,000, 9600, 7200, or 4800 bps.
V.32terbo
A proprietary standard for modems operating full-duplex with asynchronous or synchronous data
over dial networks (PSTN) or leased lines at 19,200 or 16,800 bps. The terbo is a pun on turbo
and ter; the next iteration of the V.32 recommendation, had one been finalized, would have been
V.32ter.
V.34
A standard for modems operating full-duplex with asynchronous or synchronous data over dial
networks (PSTN) or two-wire leased lines at 33,600, 31,200, 28,800, 26,400, 24,000, 21,600,
19,200, 16,800, 14,400, 12,000, 9600, 7200, 4800, or 2400 bps.
V.42
CCITT standard for error control protocol.
V.42bis
CCITT standard for data compression.
V.54
CCITT standard for local and remote diagnostic loopback tests.
VF
Voice Frequency. The part of the audio frequency range used to transmit voice sound (usually
300 Hz to 3400 Hz). This band is used by the modem for its modulated signal.
XOFF
A character that tells the DTE or modem to stop transmitting data.
XON
A character that tells the DTE or modem to start or resume transmitting data.
3825-A2-GB30-40
January 1999
Glossary-7
COMSPHERE 3825Plus Modem
Glossary-8
January 1999
3825-A2-GB30-40
Index
Symbols
! (hook flash), 4-4
“,” dial modifier (Pause), 4-4
“,” Pause Time (S8), 4-18
“;” (return to command mode), 4-4
@ (quiet answer), 4-4
Numbers
3825Plus modem
AT commands, 4-2
description, 1-1
features, 1-1
operating modes, 4-1
S-registers, 4-17
A
A/ (Repeat Last Command), 4-3
ac power, 2-3
Administration Password
%SA command (Enter), 4-29
%SA= command (Change), 4-29
described, 4-27
Answer mode (ATA), 4-3
Answer Security (S68), 4-30
Asymmetric Rate Mode, 4-19
Async/Sync Mode (AT&M), 4-11
AT Command Mode (S84), 4-25
AT commands, 4-2
“F (Clear Error Buffer), 4-7
“H (V.42bis Compression), 4-7
&&P1 (Clone Remote), 4-8
&C (LSD Control), 4-8
&D (DTR Action), 4-8
&F (Factory Defaults), 4-9
&G (V.22bis Guard Tone), 4-9
&I (Dial Transmit Level), 4-10
&J (Dial Transmit Type), 4-10
&L (Leased Mode), 4-10
&M (Async/Sync Mode and DTE Dialer Type), 4-11
&Q (Async/Sync Mode and DTE Dialer Type), 4-11
3825-A2-GB30-40
January 1999
&R (RTS Action), 4-11
&S (DSR Control), 4-12
&T (Tests), 4-12
&V (View Configuration Options), 4-12
&W (Write to Memory), 4-12
&X (Transmit Clock Source), 4-13
&Z (Store Telephone Number), 4-13
%A (Error Control Fallback Character), 4-13
%B (Modulation/Data Rate), 4-13–4-15
%C (MNP5 Data Compression), 4-14
%SA (Enter Administration Password), 4-29
%SA= (Change Administration Password), 4-29
%SB (Set VF+DTE Password), 4-29
%SD (Set DTE Password), 4-29
%SP (Display Password), 4-29
%SP= (Clear Password), 4-29
%SR (Reset Security), 4-29
%SV (Set VF Password), 4-29
+FCLASS (Service Class Selection), 4-14
*** (Command Recovery), 4-3
\A (Maximum Frame Size), 4-14
\C (Error Control Negotiate Buffer), 4-14
\D (CTS Control), 4-14
\G (Modem to Modem Flow Control), 4-14
\K (Break Buffer Control, Send Break Control, Break
Forces Escape), 4-15
\N (Error Control Mode), 4-15
\Q (Flow Control of DTE and Modem), 4-15
\T (No Data Disconnect Timer), 4-16
\X (XON/XOFF Passthrough Flow Control), 4-16
A (Answer Mode), 4-3
B (ITU-T/Bell Mode), 4-3
D (Dial), 4-4
DS (Dial Stored Number), 4-4
E (Command Echo), 4-4
H (Hook Switch Control), 4-5
I (Identification), 4-5
L (Speaker Volume), 4-5
M (Speaker On/Off), 4-5
O (Online Mode), 4-5
Q (Result Codes), 4-6
recovering use of, 2-5
Sn? (Display S-register), 4-6
Sn=r (Change S-register), 4-6
V (Result Codes Format), 4-6
X (Extended Result Code, Dial Tone Detect, Busy
Tone Detect), 4-6
Index-1
COMSPHERE 3825Plus Modem
AT commands, continued
Y (Long Space Disconnect), 4-7
Z (Reset and Load Active), 4-7
AT&T exclusive dialing, 2-6
auto-answer problems, B-2
Automatic Firmware Download Center, B-5
automatic redialing, 4-19
automode (S78), 4-24
autorate
S76 Dial Line, 4-24
S82 Leased Line, 4-25
connect problems, B-2, B-3
copy firmware to remote, 4-8
CTS Control (\D), 4-14
D
Data mode, 4-1
Data Rate (%B), 4-13
data rates supported, C-1
DATAKIT applications, 2-6, 4-11
Dial (ATD), 4-4
dial command modifiers, 4-4
Dial Line Rate (S41), 4-20
Dial Stored Number (ATDS), 4-4
dial tone detect (ATX), 4-6
dial tone wait, 4-4
dial-line connection, 2-3
dialing problems, B-3
Disconnect Delay
Receive Buffer, 4-19
Transmit Buffer, 4-22
display
configuration options, 4-12
S-register, 4-6
download failure, B-5
download latest firmware, B-5
download-only mode, 1-3, 4-8
DSR Control (AT&S), 4-12
DTE connection, 2-3
DTE password
%SD command, 4-29
described, 4-27
DTE Password Attempt Limit (S96), 4-30
DTE Password Backspace Character (S98), 4-31
DTE Password Termination Character (S97), 4-31
DTE Rate
in result codes, 4-7
problems, B-4
set to VF rate, 4-26
DTR
Alarm Reporting (S77), 4-24
make busy via (S69), 4-23
DTR Action (AT&D), 4-8
DTR Continuous Repeat, 4-19
B
Bell modulations, 4-3
Blind Dial Pause (S6), 4-18
blind dialing, 4-7
Break Buffer Control (AT\K), 4-15
Break Forces Escape (AT\K), 4-15
busy tone detect (ATX), 4-6
C
cables
auxiliary, D-2
JM8 to RJ11 crossover, 2-3, D-2
required, 2-1
supplied, 2-1
Call Answer commands (V.25bis), E-3
Call Request commands (V.25bis), E-2
Call Response (V.25bis), E-2
Call Waiting, 4-4
Callback Security (S67), 4-30
cellular enhancements
&F5 and &F6 commands, 4-9
S91 Register, 4-26
cellular transmit level, 4-10
change S-register, 4-6
character format, 4-2
problems, B-2, B-4
Clear Error Buffer (”F), 4-7
clock source (AT&X), 4-13
Clone Remote (&&P1), 4-8
command echo, 4-4, B-4
Command mode, 4-1
Command Response (V.25bis), E-4
compression
MNP5, 4-14
V.42bis, 4-7
COMSPHERE 6700 or 6800 Series NMS, 1-2
configuration options
factory default, 2-4
factory defaults (AT&F), 4-9
loading (ATZ), 4-7
loading when disconnected (S88), 4-25
saving (AT&W), 4-12
selecting, 2-4
viewing (AT&V), 4-12
connect messages, A-1
Index-2
E
echo command, 4-4
EIA-232-E cable, 2-1
EIA-232-E pin assignments, D-1
Enhanced Throughput Cellular (ETC), 4-10
Entry Wait Time (S94), 4-30
equipment provided by customer, 2-1
equipment supplied, 2-1
error codes (result codes), A-1
Error Control Fallback Character (AT%A), 4-13
Error Control Mode (AT\N), 4-15
Error Control Negotiate Buffer (AT\C), 4-14
Escape Guard Time, 4-1, 4-18
January 1999
3825-A2-GB30-40
Index
escape sequence (+++), 4-1, 4-17
ETC (Enhanced Throughput Cellular), 4-10, 4-26
&F Factory Defaults, 4-9
&I Dial Transmit Level, 4-10
\N Error Control Mode, 4-15
Cellular Enhancement, 4-26
RJ11 Cellular Adapt, 4-26
extended result codes (ATX), 4-6
L
Leased Line Carrier On Level (S48), 4-21
Leased Line Rate, 4-21
Leased Line Transmit Level (S45), 4-21
Leased Mode (AT&L), 4-10
leased-line connection, 2-3
leased-line problems, B-2
LEDs (front panel), 1-2
Line Current Disconnect (S65), 4-23
load Active (Operating) area, 4-7
LSD Control (AT&C), 4-8
F
Fast Disconnect, 4-25
fax
+FCLASS command, 4-14
operation, 3-1
problems and solutions, B-5
software settings, 3-1
standards, 3-1
types supported, 1-1
features, 1-1
firmware cloning, 4-8
firmware download, B-5
firmware revision number, 4-5
firmware upgrade, B-5
flow control
AT\Q command, 4-15
DTE to modem, 4-15
modem to DTE, 4-15
modem to modem, 4-14
problems, B-2
frame size (\A), 4-14
front panel, 1-2
front panel LEDs, 1-2
M
menu tree, remote, 5-2
MNP5 Data Compression (AT%C), 4-14
modulation problems, B-3
Modulation/Data Rate (%B), 4-13
modulations supported, C-1
N
network management system (NMS), 1-2
NMS (COMSPHERE 6700 or 6800 Series NMS), 1-2
No Carrier Disconnect (S10), 4-18
No Data Disconnect Trigger Signal, 4-25
O
operating modes, 4-1
Originate Security (S70), 4-30
H
hang up (ATH), 4-5
hook flash, 4-4
Hook Switch Control (ATH), 4-5
P
P (Pulse dial), 4-4
part numbers, 2-1
password
Administration, 4-27
deletion (%SP=), 4-29
display (%SP), 4-29
DTE (%SD), 4-29
entry attempt limit, 4-30
entry wait time, 4-30
Originate Access, 4-27
Remote Access, 4-22
types, 4-27
VF (%SV), 4-29
VF plus DTE (%SB), 4-29
VF Prompt Type, 4-30
pin assignments
EIA-232-E, D-1
JM8 to RJ11 crossover cable, D-2
Power LED, B-1
power-up procedure, 2-4
primary channel, 5-1
I
Identification (ATI), 4-5
indicator lights, 1-2
initialization strings, 2-6
DATAKIT, 2-6
synchronous leased-line applications, 2-6
V.25bis applications, 2-6
installation
3825Plus modem, 2-2
software, 2-3
ITU-T/Bell Mode (B command), 4-3
J
JM8 to RJ11 crossover cable, 2-3, D-2
3825-A2-GB30-40
January 1999
Index-3
COMSPHERE 3825Plus Modem
S67 (Callback Security), 4-30
S68 (Answer Security), 4-30
S69 (Make Busy Via DTR), 4-23
S70 (Originate Security), 4-30
S74 (Network Position Identifier), 4-24
S75 (Network Management Address), 4-24
S76 (V.32bis Autorate – Dial Line), 4-24
S77 (DTR Alarm Reporting), 4-24
S78 (V.32bis Automode), 4-24
S80 (No Data Disconnect Trigger Signal), 4-25
S82 (V.32bis Autorate – Leased Line), 4-25
S84 (AT Command Mode), 4-25
S85 (Fast Disconnect), 4-25
S88 (Straps When Disconnected), 4-25
S89 (V.42 ARQ Window Size Increase), 4-26
S90 (DTE Rate = VF Rate), 4-26
S91 (Cellular Enhancements), 4-26
S92 (V.29 Train On Data), 4-26
S94 (Entry Wait Time), 4-30
S95 (VF Prompt Type), 4-30
S96 (DTE Password Entry Attempt Limit), 4-30
S97 (DTE Password Termination Character), 4-31
S98 (DTE Password Backspace Character), 4-31
secondary channel, 5-1
security
Administration Password, 4-29
clearing passwords, 4-29
displaying passwords, 4-29
DTE password, 4-27
DTE type password, 4-29
reset (%SR), 4-29
selecting Answer Security type (S68), 4-30
VF and DTE, 4-27
VF password, 4-27
VF plus DTE, 4-29
VF type password, 4-29
VF with DTE, 4-27
self-test
AT&T9, 4-12
failure, B-1
power-up, 2-4
Send Break Control (AT\K), 4-15
serial number, 4-5
speaker on/off, 4-5
speaker volume, 4-5
status indicators, 1-2
stop test (AT&T0), 4-12
Straps When Disconnected (S88), 4-25
synchronous leased-line applications, 2-6
Q
quiet answer, 4-4
R
R (Reverse dial), 4-4
recovering use of AT commands, 2-5
redialing, automatic, 4-19
remote access (S55), 4-22
Remote Access Password, 4-22
Remote branch, 5-1
remote modem Top-Level menu, 5-2
Repeat Last Command (A/), 4-3
reset (ATZ), 4-7
Result Code Control (ATQ), 4-6
result codes, A-1
extended, 4-6
Result Codes Format (ATV), 4-6
return to command mode, 4-4
return to Online mode (ATO), 4-5
ring number (S0), 4-17
RTS Action (&R), 4-11
RTS-to-CTS Delay (S26), 4-19
S
S-registers
changing, 4-6
displaying, 4-6
list of, 4-17
S0 (Auto-Answer RIng Number), 4-17
S2 (Escape Character), 4-1, 4-17
S3 (Carriage Return Character), 4-17
S4 (Line Feed Character), 4-18
S5 (Backspace Character), 4-18
S6 (Blind Dial Pause), 4-18
S7 (No Answer Timeout), 4-18
S8 (“,” Pause Time), 4-18
S10 (No Carrier Disconnect), 4-18
S12 (Escape Guard Time), 4-1, 4-18
S14 (Asymmetric Rate Mode), 4-19
S18 (Test Timeout), 4-19
S26 (RTS-to-CTS Delay), 4-19
S38 (DTR Continuous Repeat), 4-19
S39 (Receive Buffer Disconnect Delay), 4-19
S41 (Dial Line Rate), 4-20
S43 (V32bis Train), 4-20
S44 (Leased Line Rate), 4-21
S45 (Leased Line Transmit Level), 4-21
S48 (Leased Line Carrier On Level), 4-21
S49 (Transmit Buffer Disconnect Delay), 4-22
S55 (Access from Remote), 4-22
S56–S59 (Remote Access Password), 4-22
S62 (V.25bis Coding), 4-22
S63 (V.25bis Idle Character), 4-23
S64 (V.25bis New Line Character), 4-23
S65 (Line Current Disconnect), 4-23
S66 (NMS Call Messages), 4-23
Index-4
T
T (Tone dial), 4-4
telephone connection, 2-3
telephone directory (AT&Z), 4-13
Test Timeout (S18), 4-19
tests (AT&T), 4-12
timeout for no answer (S7), 4-18
transmit level (AT&I), 4-10
transmit type (AT&J), 4-10
troubleshooting, B-1
January 1999
3825-A2-GB30-40
Index
U
W
UNIX, factory default for, 4-9
upgrade instructions, B-5
W (Wait for dial tone), 4-4
X
V
XON/XOFF, 4-15
XON/XOFF Passthrough (AT\X), 4-16
V.21 or V.22 modulation, 4-3
V.25bis applications, 2-6
V.25bis Coding (S62), 4-22
V.25bis dialing, 4-11
V.25bis dialing commands, E-1
V.25bis Idle Character (S63), 4-23
V.25bis New Line Character, 4-23
V.29 Train On Data (S92), 4-26
V.32bis Automode (S78), 4-24
V.32bis Autorate (Dial Line), 4-24
V.32bis Autorate (Leased Line), 4-25
V.32bis Train (S43), 4-20
V.42 ARQ Window Size (S89), 4-26
V.42bis Compression (AT“H), 4-7
VF and DTE security, 4-27
VF password
%SV command, 4-29
described, 4-27
VF plus DTE password, %SB command, 4-29
VF Prompt Type (S95), 4-30
VF Rate, 4-20, 4-21
VF rate, 4-13
VF with DTE security, 4-27
3825-A2-GB30-40
January 1999
Index-5
COMSPHERE 3825Plus Modem
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Index-6
January 1999
3825-A2-GB30-40
✄
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