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Model MT5634ZBA
Model MT5634ZBAV
Data/Fax Modem
Data/Fax/Voice Modem
User Guide
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NOTE: This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Plug the equipment into an outlet on a circuit different from that to
which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Operation of this device is subject to the following conditions: (1) This device
may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
WARNING: Changes or modifications to this unit not expressly approved by
the party responsible for compliance could void the user’s authority to operate the equipment.
FAX WARNING: The Telephone Consumer Protection Act of 1991 makes it
unlawful for any person to use a computer or other electronic device to send
any message via a telephone fax machine unless such message clearly contains in a margin at the top or bottom of each page or the first page of the
transmission, the date and time it is sent and an identification of the business or other entity, or other individual sending the message and the telephone number of the sending machine or such business, other entity, or
individual.
See your fax software manual for setup details.
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Model MT5634ZBA
Model MT5634ZBAV
Data/Fax Modem
Data/Fax/Voice Modem
User Guide
Page 4
Owner’s Manual
Models MT5634ZBA and MT5634ZBAV
P/N 88301900 Revision A (3/2/98)
Copyright ©1998, by Multi-Tech Systems, Inc.
All rights reserved. This publication may not be reproduced, in whole or in part, without
prior expressed written permission from Multi-Tech Systems, Inc.
Multi-Tech Systems, Inc. makes no representations or warranties with respect to the
contents hereof and specifically disclaims any implied warranties of merchantability or
fitness for any particular purpose. Furthermore, Multi-Tech Systems, Inc. reserves the
right to revise this publication and to make changes in the content hereof without obligation of Multi-Tech Systems, Inc. to notify any person or organization of such revisions or changes.
Record of Revisions
Revision Date Description
A 3/2/98 Manual released.
Trademarks
MultiModemZBA, MultiModemZBAV, Multi-Tech, and the Multi-Tech logo are
trademarks of Multi-Tech Systems, Inc.
IBM is a trademark of International Business Machines Corporation. MNP and
Microcom Network Protocol are trademarks of Microcom, Inc. K56flex is a
registered trademark of Rockwell International Corporation and Lucent Technologies Corporation. Microsoft, Windows, Windows 95, and Windows NT are either
registered trademarks or trademarks of Microsoft Corporation in the United States
and/or other countries.
Notice
Though these modems are capable of 56K bps download performance, line
impairments, public telephone infrastructure and other external technological
factors currently prevent maximum 56K bps connections.
Multi-Tech Systems, Inc. Fax (612) 785-9874
2205 Woodale Drive Fax-Back Service (612) 717-5888
Mounds View, MN 55112 U.S.A Technical Support (800) 972-2439
(612) 785-3500 or (800) 328-9717 Internet http://www.multitech.com
BBS (612) 785-3702 or (800) 392-2432
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Contents
Chapter 1: Introduction
Introduction ................................................................................................3
Product Description ...................................................................................3
What Is in Your Modem Package?............................................................4
Related Manuals........................................................................................5
Chapter 2: Quick Start
Introduction ................................................................................................9
What You Will Need ..................................................................................9
We supply.............................................................................................9
You supply............................................................................................9
Safety Warnings ......................................................................................10
Step 1: Assemble the Modem .................................................................11
Step 2: Change the Internal Jumpers .....................................................12
Opening the Modem .......................................................................... 12
Changing the Speaker Jumper .......................................................... 14
Changing the Dial-Up/Leased-Line Jumpers.....................................14
Step 3: Connect the Modem to Your System..........................................15
RS232 Connection .............................................................................16
Line Connection ................................................................................. 16
Phone Connection..............................................................................16
Microphone Connection (MT5634ZBAV only) ...................................16
Speaker Connection (MT5634ZBAV only).........................................17
Power Connection .............................................................................. 17
Power-On Test ...................................................................................17
Step 4: Install the Modem in Windows .................................................... 18
Adding the Modem to Windows 95 or NT .......................................... 18
Removing Your Old Modem from Windows 95 or NT ....................... 19
Step 5: Install and Configure Your Software...........................................20
Step 6: Call the Multi-Tech BBS..............................................................23
Windows 95 HyperTerminal ............................................................... 23
Windows Terminal..............................................................................24
Step 7: Send a Fax..................................................................................26
Step 8: Test the MT5634ZBAV Voice Circuits ........................................28
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Voice Mail Test...................................................................................28
Loopback Test....................................................................................28
Speakerphone Test ............................................................................ 29
References .............................................................................................. 30
Chapter 3: Features
What Can You Do with Your Modem? .................................................... 33
Features...................................................................................................34
Required Equipment ................................................................................ 36
Computer............................................................................................36
Serial Cable........................................................................................36
Telephone Line .................................................................................. 37
Communications Software .................................................................37
Connections ............................................................................................. 38
Connecting to the Computer (“RS232”) ............................................. 38
Connecting to the Telephone Line (“LINE”).......................................39
Connecting to a Telephone Set (“PHONE”) ......................................39
Connecting to a Microphone (“MIC”) .................................................39
Connecting to a Speaker (“SPKR”)....................................................40
Connecting to a Sound Card (“SPKR”) .............................................. 40
Connecting to Power (“PWR”) ...........................................................40
Surge Protectors and Lightning .........................................................41
Front Panel .............................................................................................. 42
Chapter 4: AT Commands, S-Registers & Result Codes
AT Commands.........................................................................................47
AT Command Summary ..........................................................................48
S-Registers .............................................................................................. 70
Result Codes ........................................................................................... 75
Chapter 5: Remote Configuration
Introduction ..............................................................................................79
Basic Procedure ......................................................................................79
Setup........................................................................................................80
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Contents
Changing the Setup Password ..........................................................80
Changing the Remote Escape Character ..........................................81
Chapter 6: Callback Security
Introduction ..............................................................................................85
Setup Procedures ....................................................................................85
To Change the Setup Password ........................................................ 86
To Turn Callback Security On and Off...............................................86
To Set the Parity of the Callback Security Messages .......................87
To Assign Callback Passwords and Phone Numbers .......................88
Calling Procedures ..................................................................................90
Password-Only Callback ....................................................................90
Number-Entry Callback ......................................................................91
Extension-Entry Callback ...................................................................92
Direct Connection...............................................................................93
Callback Security Commands .................................................................94
Chapter 7: Solving Problems
Introduction ............................................................................................103
None of the Indicators Light ..................................................................103
The Modem Does Not Respond to Commands ....................................104
The Modem Dials But Cannot Connect.................................................107
The Modem Disconnects While Online .................................................109
The Modem Cannot Connect When Answering....................................110
File Transfer Is Slower Than It Should Be ............................................ 110
Data Is Being Lost ................................................................................. 111
There Are Garbage Characters on the Monitor ....................................111
The Modem Doesn’t Work with Caller ID .............................................. 112
Fax and Data Software Can’t Run at the Same Time .......................... 112
Appendix A: Regulatory Compliance
FCC Regulations for Telephone Line Interconnection ..........................115
Canadian Limitations Notice..................................................................117
FCC Fax Update....................................................................................118
Compliance with BABT Requirements ..................................................119
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European Low Voltage Directive ...........................................................120
EMC and Safety Compliance ................................................................ 120
Australian Modem Warning Notice........................................................121
Modem Commands ..........................................................................121
Call Attempts/Retries .......................................................................121
Use of Supplied Power Transformer................................................122
For Voice Modems ...........................................................................122
New Zealand Telecom Warning Notice.................................................123
Use of Supplied Power Transformer................................................123
Appendix B: Technical Specifications.................................
125
Appendix C: Loopback Tests
Introduction ............................................................................................131
Local Analog Loopback Test (V.54 Loop 3) .......................................... 132
Remote Digital Loopback Test (V.54 Loop 2) .......................................133
Local Digital Loopback Test (V.54 Loop 2) ...........................................135
Appendix D: Warranty, Service, and Technical Support
Limited Warranty ...................................................................................137
Service ...................................................................................................138
Technical Support..................................................................................138
Online Warranty Registration ................................................................ 139
The Multi-Tech BBS ..............................................................................139
To Log on to the Multi-Tech BBS.....................................................139
To Download a File ..........................................................................140
About the Internet .................................................................................. 141
About CompuServe ...............................................................................142
About the Multi-Tech Fax-Back Service ................................................ 142
Appendix E: Upgrade Procedures
Introduction ............................................................................................143
Upgrade Overview ................................................................................. 143
Step 1: Identify the Modem Firmware ...................................................144
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Step 2: Identify the Current Firmware Version......................................144
Multi-Tech Web Site.........................................................................144
Multi-Tech BBS ................................................................................145
Step 3: Download the Upgrade File ...................................................... 146
Multi-Tech Web Site.........................................................................146
Multi-Tech BBS ................................................................................146
Step 4: Extract the Upgrade Files ......................................................... 147
Step 5: Clear Your Stored Paramenters ...............................................147
Step 6: Upgrade the Modem’s Firmware ..............................................148
DOSFLASH ......................................................................................148
FLASHWIN ....................................................................................... 149
FLASHNT .........................................................................................149
Step 7: Restore Your Parameters .........................................................150
Index........................................................................................
151
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1
Introduction
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User Guide
2
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1 Introduction
Introduction
Welcome to the world of data communications. You have acquired one
of the finest intelligent data and fax modems available today from one
of America’s oldest and most respected modem manufacturers: MultiTech Systems, Inc. This owner’s manual will help you install, configure,
test and use your modem.
Product Description
The MT5634ZBA and MT5634ZBAV modems incorporate
technology, which enables Internet connections at data rates up to 53K
bps* over standard telephone lines. K56flex technology is able to send
data downstream from the Internet to your computer at these speeds
because data on the telephone network typically is converted from digital
to analog only once before it reaches your modem. Upstream transmissions, and transmissions between client modems, are limited to data
rates of 33.6K bps, as are downstream transmissions that are converted more than once on the telephone network.
K56flex is an interim standard. However, because Multi-Tech’s K56flex
modems are flash-upgradeable, they can easily be upgraded to the new
ITU-T V.90 56K bps standard when it becomes available.
Both modems are Plug and Play-capable, with interactive automatic
dialing and command mode configuration. In standard mode, you can
store up to four command lines or telephone numbers of up to 40 characters each in the modems’ nonvolatile memory. In callback security
mode, you can store up to 30 passwords and dialing strings. The modems pulse- or tone-dial, and recognize dial tones and busy signals for
reliable call-progress detection. The modems can detect AT&T calling
K56flex
™
*Though these modems are capable of 56K bps download performance, line im-
pairments, public telephone infrastructure, and other external technological factors currently prevent maximum 56K bps connections.
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User Guide
card tones. They also have DTR dialing, Caller ID, remote configuration, callback security, two-wire leased-line, and 11-bit capabilities, and
incorporate self-resetting lightning protection. Serial port speeds can be
set to 230,400 bps. They are both FCC-registered for connection without notification to the telephone company.
Both are full-duplex intelligent modems with V.42 error correction,
V.42bis data compression, and V.17 (14,400 bps), Class 1 and 2,
Group 3 fax capabilities.
In addition to the preceding features, the MT5634ZBAV modem provides support for answering machine and voice mail applications.
What Is in Your Modem Package?
Your modem package has several components. Make sure you have
them all before trying to operate your modem. Your package should
include:
One MT5634ZBA or MT5634ZBAV modem
•
One DC power supply
•
One set of four plastic feet
•
Two sets of Velcro fasteners
•
One modular telephone cable
•
This
Owner’s Manual
•
Trio data, fax, and voice software
•
If any of these items are missing, please contact Multi-Tech Systems or
your dealer/distributor (see Appendix D for information on contacting MultiTech via telephone, fax, bulletin board service, CompuServe, and the Internet).
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Related Manuals
The following manuals are available on request.
82039200
82076200
82006501
Voice +V Commands Developer's Kit
MT56XX Fax Class 1 Developer’s Guide
TR29.2 (Proposed) Class 2 Fax Command Reference Manual
1 Introduction
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User Guide
6
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2
Quick Start
Page 18
User Guide
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2 Quick Start
Introduction
We know you are eager to get your Multi-Tech fax modem up and running, so we’ll skip the features for now, and show you step-by-step how
to set it up, check it out, and make your first calls.
What You Will Need
Before starting, please make sure you have everything you need:
We supply
4
An MT5634ZBA or MT5634ZBAV data/fax modem
4
A DC power supply module
4
One set of four plastic feet
4
Two sets of hook-and-loop fasteners
4
One modular telephone cable
4
Trio communications software
4
A
Quick Start Guide
4
This
User Guide
4
An installation disk
You supply
4
A computer with an unused serial port
4
A shielded RS-232 serial cable with a male DB-25 connector on
one end and a connector to match your computer’s serial port on
the other end
4
A nearby AC power outlet
4
A nearby telephone line jack
4
An optional PC stereo microphone (MT5634ZBAV only)
4
An optional headset, amplified speaker, or sound card with
speakers (MT5634ZBAV only)
on disk
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User Guide
4
For connecting to the sound card, an optional male-to-male stereo patch cord with 1/8-inch mini plugs (MT5634ZBAV only)
If you are new to computers, see Chapter 3, “Features,” for more information about the required equipment.
Safety Warnings
Never install telephone wiring during a lightning storm.
•
Never install a telephone jack in a wet location 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 elec-
•
trical storm; there may be a remote risk of electrical shock from
lightning.
Do not use a telephone in the vicinity of a gas leak.
•
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2 Quick Start
Step 1: Assemble the Modem
The only assembly required is to mount the feet on the bottom of the
modem. Simply peel the four self-adhesive plastic feet off the backing
strip and press them into the recesses on the bottom of the modem.
Alternately, or additionally, you can use the included self-adhesive
hook-and-loop patches to mount the modem to a vertical surface or to
keep it from being dislodged on a horizontal surface. If you use the
hook-and-loop patches, we recommend that you mount them where
they will not obscure the labels or screws on the bottom of the modem.
Figure 2-1. Mounting the feet.
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Step 2: Change the Internal Jumpers
Skip this step unless
• you have an MT5634ZBAV and intend to add a monophonic external speaker. (This step is not required for stereo speakers.)
• you intend to use your modem on a leased line.
If either case applies, you must open the modem and move one or
more jumpers on the modem’s printed circuit board.
Caution: The circuit board can be harmed by static electricity. Before
you open the case, touch a grounded object such as a water faucet to
discharge any static electricity in your body, then touch the metal shell
of the modem’s RS232 connector to ensure that there is no voltage
difference between you and the modem.
Warning: The following procedure must be performed by authorized
service personnel.
Opening the Modem
1. If the modem is connected, turn it off and remove all connecting
cables, including power and line cables.
2. Turn the modem over.
3. On the bottom of the modem are two screws that hold the case to-
gether. Remove both screws and set them aside.
4. Turn the modem over again.
5. Remove the top part of the modem case.
6. To close the modem, reverse steps 1–5.
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2 Quick Start
J10 Dial-Up/Leased Line
Leased line
Dial-up (default)
J11
J10
Figure 2-2. Internal jumpers (MT5634ZBAV).
J11 Originate/Answer
Answer (default)
Originate
J8
J8 Speaker Mode
Closed: stereo (default)
Open: mono
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Changing the Speaker Jumper
The speaker jumper (J8) is next to the external speaker jack (see
Figure 2-2).
• To use the MT5634ZBAV modem with a monophonic external
speaker, remove the jumper plug from the J8 jumper pins. You can
store it by placing it on one jumper pin.
• To use the MT5634ZBAV modem with a stereo speaker or sound
card, place the jumper plug on both pins of the J8 jumper. This is
the factory default position.
Changing the Dial-Up/Leased-Line Jumpers
As shipped from the factory, your modem is configured for normal dialup operation. That is, the modem must dial a phone number to connect
to another modem. To use the modem on a leased line, you must
change jumper J10 to select leased line operation, and J11 to select
whether it will be the originating or the answering modem. (If dial-up
operation is selected, J11 has no effect.) See Figure 2-2 for jumper
locations and positions.
• To use the modem on a leased line, move the J10 jumper plug from
the default dial-up position to the leased line position.
• To make the modem the originating modem on the leased line,
move the J11 jumper plug to the originate position.
• To make the modem the answering modem on the leased line, leave
the J11 jumper plug in the factory default answer position.
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2 Quick Start
Step 3: Connect the Modem to Your System
Placing the modem in a convenient location, connect it to your computer’s serial port, to the telephone line, to AC power, and, optionally,
to your telephone (UK and international models do not have a telephone jack). If yours is an MT5634ZBAV model, you can also optionally
connect it to a microphone and a speaker or sound card.
PWR RS232 PHONE LINE
Figure 2-3. Modem connections.
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RS232 Connection
Plug one end of the serial cable into the RS232 connector on the modem, and the other end into a serial port connector on your computer,
such as COM1 or COM2.
Line Connection
Plug one end of the phone cable into the modem’s LINE jack, and the
other end into a phone line wall jack.
Note: The LINE jack is not interchangeable with the PHONE jack. Do not
plug the phone into the LINE jack or the line cable into the PHONE jack.
Note: The Federal Communications Commission (FCC), Industry
Canada, and the British Approvals Board for Telecommunications
(BABT) impose certain restrictions on equipment connected to public
telephone systems. See Appendix A for more information.
Phone Connection
For voice-only calls, you can optionally plug a telephone into the modem’s PHONE jack. The UK and international models do not have a
PHONE jack.
Microphone Connection (MT5634ZBAV only)
For voice mail or speakerphone applications, plug an unamplified microphone into the MIC jack on the side of the modem. The microphone
should have a stereo 1/8-inch mini plug. Do not use a monophonic microphone.
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2 Quick Start
Speaker Connection (MT5634ZBAV only)
For speakerphone or voicemail applications, use a 1/8-inch-plug maleto-male stereo patch cord to connect the SPKR jack on the side of the
modem to the LINE IN jack on your sound card.
If you do not have a sound card, you can plug an amplified speaker
directly into the SPKR jack.
Power Connection
Plug the power supply module into an AC power outlet or power strip.
Plug the power supply’s cable into the PWR jack on the modem.
Note: Use only the power supply supplied with the modem. Use of any
other power supply will void the warranty and could damage the modem.
Power-On Test
Test the modem by turning it on (a power on/off switch is located on the
right side). When you apply power, the modem performs a diagnostic
self-test, indicated by several indicators flashing for a second or two,
after which the 56 indicator should light. If this does not happen, check
that the power switch is on, the power supply is solidly connected, and
the AC outlet is live. If these measures do not work, see Chapter 7,
“Solving Problems.”
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Step 4: Install the Modem in Windows
If you are using Windows 95 or Windows NT 4.0, you must install the
modem in the operating system. (If you are using another operating
system, you can skip this step.)
Adding the Modem to Windows 95 or NT
1. Click the Start button, point to Settings, and click Control Panel.
2. Double-click the Modems icon. If no modem is currently installed,
the Install New Modem wizard appears. If a modem is already in-
stalled, the Modems Properties sheet appears; click Add to go to
the Install New Modem wizard.
3. Click Next in the Install New Modem wizard. Windows searches for
your new modem and asks you to verify its selection.
Note: If Windows cannot find a modem, your modem may be
turned off, it may be plugged into the wrong connector on your computer, or the serial cable may be faulty. See “None of the LEDs
Light When the Modem Is Turned On” and “The Modem Does Not
Respond to Commands” in Chapter 7, “Solving Problems.”
4. If Windows identifies your modem correctly as a MultiModem
MT5634ZBA, click Next to install the modem. After the modem is
installed, click Finish to exit.
5. If Windows cannot identify your modem (for instance, if it identifies
your modem as a “Standard Modem”), click Change. A dialog box
with a list of manufacturers and a list of modems appears.
6. Insert your modem’s setup disk into your floppy drive and click
Have Disk.
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2 Quick Start
7. Windows 95 only: In the Install from Disk dialog box, select the
drive the installation disk is in and click OK.
8. A list of modems appears. Select your modem from the list and click
Next.
9. Windows NT 4.0 only: Click Next again.
10. Windows installs and configures the modem.
11. Click Finish to exit.
Removing Your Old Modem from Windows 95 or NT
When your new modem replaces another modem, the old modem installation remains in Windows after you install the new modem, and the
old modem is still selected in HyperTerminal and other Windows 95 or
NT applications. Although you can change the application connection
descriptions one at a time, it is easier to force Windows applications to
use the new modem by removing the old modem from Windows.
1. Click the Start button, point to Settings, and click Control Panel.
2. Double-click the Modems icon to open the Modems Properties
sheet.
3. In the list box, select the old modem.
4. Click Remove, then click Close.
5. The next time you dial a HyperTerminal connection, it will select
your new modem and ask you to confirm the selection.
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Step 5: Install and Configure Your Software
You must have communications software installed in your computer to
use your Multi-Tech modem. If you wish to use communications software that is already installed, you should reconfigure it for your new
modem; otherwise, install the data and fax communications software
provided with the modem.
1. Turn on your computer and run your communications software.
2. Find the dialog box or menu that lets you specify your modem. (In
Windows Terminal select Settings | Modem Commands; in HyperTerminal select File | Properties | Phone Number; in ProComm
Plus for Windows select Window | Setup | Advanced; and in Trio
select View | Datacomm | Communications | Setup | Modem |
Select from List.
3. Choose your modem from the software’s modem list. If it isn’t list-
ed, choose a generic modem and modify the settings as necessary.
4. Change the modem initialization string, if necessary. The factory
default configuration works well for most purposes. To load the
factory default configuration, use AT&F. To load a custom configuration that was saved using the &W command, use ATZ. Note
that the Z command must be in a command string by itself. For a
Macintosh, the initialization string should include the
mand. If you do not want the modem to always answer the phone,
add S0=0 to the string. To use Caller ID with the modem, add S0=2
to the string (Caller ID information is sent between the first and second rings, so the phone must ring at least twice befor the modem
picks up the line). Depending on the software, you might have to
end the string with a carriage return character (^M).
&D0
com-
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2 Quick Start
Note: To change the modem’s default configuration, type new com-
mands in the software’s terminal window, adding the
to store them in the modem’s nonvolatile memory. For instance, to
create a default configuration for a Macintosh computer that turns
off autoanswer, type AT&F&D0S0=0&W. The new configuration
loads automatically whenever the modem is turned on or receives
the ATZ command.
5. Select the port the modem is connected to (normally COM1 or
COM2).
6. Select your serial port speed. This can be labeled “maximum
speed,” “DTE bps,” or “baud rate.” Ideally, if you use data compression, you should set your serial port baud rate to four times the modem’s maximum transmission speed or faster; however, few files
can be compressed enough to require speeds that high, and not all
serial ports can handle speeds that high. Set the serial port baud
rate to 115,200 bps if your computer has a high speed serial port
with a 16550AFN UART or equivalent and Windows 95 or NT 4.0,
or set it to 57,600 bps if it has Windows 3.1x. If you have an older
computer with a 14550 UART, set it to 19,200 bps. Older Macintosh
computers can use a serial port baud rate of 57,600 bps; newer
ones can use a serial port baud rate of 115,200 bps or 230,400 bps.
To see what UART your serial port uses if you have Windows 3.1x,
in Program Manager select File | Run, type MSD, and press ENTER. Select COM Ports to see the UART type. If you have Windows 95, select Start | Settings | Control Panel, and double-click
on the Modems icon. In the Modems Properties dialog box, click
the Diagnostics tab, click the port the modem is connected to, and
click More Info to see the UART type. Note that both programs will
identify a 14550 UART as an 8250A UART. If you have an 80386 or
later computer, your UART is most likely a 14550 or 16550AFN.
&W
command
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7. If the software has an autobaud selection, make sure it is disabled.
Autobaud applies only to older modems, and can cause problems if
enabled.
8. If the software allows you to edit the no-connect messages (
CARRIER, BUSY, NO ANSWER, NO DIALTONE
is no space between
9. Refer to the software manual or online Help for other configuration
choices; in most cases you can accept the default values.
DIAL
and
TONE
in
NO DIALTONE
), make sure there
NO
.
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2 Quick Start
Step 6: Call the Multi-Tech BBS
Test the modem’s data functions by calling the Multi-Tech bulletin board
system (BBS) and downloading REGISTER.DOC, if you have Microsoft
Word 6.0 or 7.0, or REGISTER.TXT if you do not.
Windows 95 HyperTerminal
1. Click Start; then choose Programs, Accessories, and HyperTermi-
nal.
2. Start HyperTerminal by double-clicking on the Hypertrm icon. Hy-
perTerminal asks for the name of the connection.
3. Type Multi-Tech BBS in the Name box and click OK.
4. In North America, type 800 in the Area code box and 392-2432 in
the Phone number box. Local and international users, type 612 in
the Area code box and 785-3702 in the Phone number box.
5. Verify that your modem is selected in the Connect using box, then
click OK.
6. In the Connect dialog box, click Dialing Properties.
7. Make any necessary changes in the Where I am and the How I dial
from this location boxes. If you must dial 9 to access an outside
line, you should type 9 in both the local and the long distance boxes
unless your phone system has a special requirement.
8. Click OK, then click Dial. You will know you have reached a modem
by the harsh sounds of the modem handshake.
9. When the BBS welcome screen appears in the HyperTerminal win-
dow, type your first name, last name, and password following the
prompts. If you are a first-time caller, the BBS asks if your name is
spelled correctly. If you answer Y, a questionnaire appears. You
must complete the questionnaire to use the BBS on your first call.
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10. Press ENTER until the main menu appears. From the main menu
you have access to two areas: the Files Menu and News. For help
with menu commands, type ?.
11. In the Main Menu, type F and press ENTER to access the Files
Menu, then type D and press ENTER to download.
12. At the prompt, if you have Microsoft Word 6.0 or later, type
register.doc and press ENTER twice. If you do not have Microsoft
Word, type register.txt and press ENTER twice.
13. Answer Y or N to the automatic logoff question.
14. Type Z and press ENTER to select the Zmodem transfer protocol.
15. The download begins automatically. As the file is copied to the
HyperTerminal folder, a dialog box reports on the progress of the
download. If the download fails, your baud rate may be set too high.
Log off, set the COM port baud rate lower, and call again.
16. To log off the BBS if you answered N in step 13, press ENTER, type
G for “good-bye,” and press ENTER twice more.
17. In the HyperTerminal window, click File, then click Save to save the
HyperTerminal connection description.
Windows Terminal
1. Open the Accessories program group and double-click on the
Terminal icon.
2. Select the Settings menu and make the following changes:
Phone Number:
or type an overseas access code and 612-785-3702 if you are out-
side North America.
Communications:
and change the following: Baud rate to 19200; Flow control to
Hardware; and Carrier Detect to checked.
24
Type 1-800-392-2432 if you are in North America,
Select the COM port the modem is connected to
Page 35
2 Quick Start
Modem Commands:
outside line, type ATDT9, in the Dial prefix box (include the comma).
3. Click File, then click Save, and save as multibbs.trm.
4. Click Phone, then click Dial to dial the BBS. You will know you
have reached a modem by the harsh sounds of the modem handshake.
5. When the BBS welcome screen appears in the HyperTerminal win-
dow, type your first name, last name, and password following the
prompts. If you are a first-time caller, the BBS asks if your name is
spelled correctly. If you answer Y, a questionnaire appears. You
must complete the questionnaire to use the BBS on your first call.
6. Press ENTER until the main menu appears. From the main menu
you have access to two areas: the Files Menu and News. For help
with menu commands, type ?.
7. In the Main Menu, type F and press ENTER to access the Files
Menu, then type D and press ENTER to download.
8. At the prompt, if you have Microsoft Word 6.0 or later, type
register.doc and press ENTER twice. If you do not have Microsoft
Word, type register.txt and press ENTER twice.
9. Answer Y or N to the automatic logoff question.
10. Type X and press ENTER to select the Xmodem transfer protocol.
11. To begin the download in Terminal, click Transfers, then click Re-
ceive binary file. Next, select the destination directory, type the file
name (register.doc or register.txt), and click OK. If the download
fails, your baud rate may be set too high. Log off, set the COM port
baud rate lower, and call again.
12. To log off the BBS if you answered N in step 9, press ENTER, type
G for “good-bye,” then press ENTER twice again.
Select MultiTech. If you must dial 9 to get an
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Step 7: Send a Fax
To test your modem’s fax capabilities, send the completed registration
file that you downloaded in “Step 5: Call the Multi-Tech BBS” to MultiTech or to a fax machine in your office. The following procedure uses the
Microsoft Fax application that is included with Windows 95 or later. If
you do not have Microsoft Fax, you can send the file using the fax software included with the modem.
Microsoft Fax is installed in Windows 95 as part of the Microsoft Exchange option. You can use Microsoft Fax either as a stand-alone fax
program or to fax from within another application. In the following procedure you will test your fax modem by running Microsoft Fax as a standalone fax program.
1. Depending on which version of the registration file you downloaded,
use either Microsoft Word or NotePad to open the registration file.
2. Fill out the registration form.
3. Save the file and exit Word or NotePad.
4. Select Start | Programs | Accessories | Fax | Compose new fax.
5. The Compose New Fax wizard appears. Click Next.
6. If you are sending the registration form to your own fax machine or
to another fax modem in your office, type the destination name and
phone number in the To and Fax # boxes.
If you are sending the registration form to our offices, type Multi-
Tech Systems in the To box, and 612 785-9874 in the Fax # boxes.
7. Click Add to list, then click Next.
8. Pick a cover page, then click Next.
9. Type a subject line (e.g., MT5634ZBAV registration) and a note to
go on the cover page, then click Next.
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2 Quick Start
10. Click Add file. In the Open a file to attach dialog box, select the
registration file and click Open. The registration file is added to the
Files to send list box.
11. Click Next, then click Finish.
12. Microsoft Fax opens the registration file in Word or NotePad, prints
it to the Rendering System, then dials the recipient and sends the
fax.
13. Exit Microsoft Fax when the Status dialog box says the fax has
been successfully sent.
Other Ways to Access Microsoft Fax
In a Windows 3.1x or Windows 95 application, select select Print
•
from the File menu, then select Microsoft Fax as the default print-
er.
In a Windows 95 application, select Send from the File menu.
•
In Microsoft Exchange, select Compose, then select New fax.
•
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Step 8: Test the MT5634ZBAV Voice Circuits
There are several tests that you can perform to verify the voice c i rcuits
of the MT5634ZBAV. Try the answering machine test first; if that doesn’t
work, and if you have a microphone and speaker connected to the
MT5634ZBAV, try the loopback and speakerphone tests, which do not
require special software.
Voice Mail Test
Test the MT5634ZBAV’s voice function by using the included software
to set up the MT5634ZBAV for voice mail. Have an acquaintance call
and leave a message, then play it back.
If your modem does not play sound files in voice mode, go to Windows
Control Panel and double-click on the Multimedia icon. Under the Au-
dio tab, select Modem Wave Driver as your preferred device for both
playback and recording, then try again.
Loopback Test
1. Connect a microphone and speaker to the MT5634ZBAV. To avoid
feedback, make sure the microphone and speaker are well separated; better yet, use a headphone instead of a speaker.
2. Select Start, point to Programs, point to Accessories, and click
HyperTerminal.
3. Double-click on the Multi-Tech BBS icon you created in “Step 5:
Call the Multi-Tech BBS.” HyperTerminal starts with the Connect
dialog box open.
4. Click Cancel in the Connect dialog box.
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2 Quick Start
5. In the HyperTerminal terminal window, type AT&&S and press EN-
TER. This command causes input from the microphone to be
looped back to the speaker.
6. Speak into the microphone; you should hear your voice on the
speaker or headphone.
7. Type ATZ and press ENTER to reset the modem.
Speakerphone Test
1. Connect a microphone and speaker to the MT5634ZBAV.
2. Select Start, point to Programs, point to Accessories, and click
HyperTerminal.
3. Double-click on the Multi-Tech BBS icon you created in “Step 5:
Call the Multi-Tech BBS.” HyperTerminal starts with the Connect
dialog box open.
4. Click Cancel in the Connect dialog box.
5. In the HyperTerminal terminal window, type
AT+FCLASS=8
AT+VLS=7
ATDT
xxxxxxx
6. Speak into the microphone to talk to the person on the other end of
the line, and listen over the speaker.
7. Type +++ATH and press ENTER to hang up.
8. Type ATZ and press ENTER to reset the modem.
(for
xxxxxxx
substitute a telephone number)
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References
The World Wide Web is an excellent source of information about modems in general and modem installation, configuration, and troubleshooting in particular. The following Web sites are good places to start:
• Costmo’s Other Resources Page:
http://modems.rosenet.net/or/
• Curt’s High Speed Modem Page:
http://elaine.teleport.com/~curt/modems.html
• Data Communications FAQ:
http://www.best.com/~malch/comfaq.html
• Multi-Tech Systems, Inc.:
http://www.multitech.com/
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Features
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User Guide
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3 Features
What Can You Do with Your Modem?
Your Multi-Tech MultiModem is the gateway to the exciting world of
telecommunications.
You can use it to access commercial online information services such
as CompuServe, America Online, Genie, and Prodigy. These services
provide access to databases, encyclopedias, stock reports, news,
weather, and shopping. They provide electronic mail (e-mail) links to
subscribers of the same and other services. Public message areas
called forums allow subscribers to trade information and opinions on a
vast array of topics from A to Z, while vendor forums provide hardware
and software support from Multi-Tech and other manufacturers. Online
services also allow you to upload and download computer programs,
data files, and updated software such as video and printer drivers.
Your modem can also connect you to the Internet, an international computer network of universities, libraries, businesses, and government
agencies. Like the commercial online services, the Internet provides email services, public message areas, and access to information and
software, much of it easily accessed through the World Wide Web.
Other uses include direct links to colleagues with modems, to banks, and
to service bureaus. You can also telecommute with your fax modem—
work at home while communicating with the office by modem or fax.
And of course, you can use your modem to exchange faxes with any
fax machine in the world, enabling you to communicate quickly with
businesses and organizations that do not have direct modem communications.
If you have the MT5634ZBAV model, you can also use your modem
with voice mail and speakerphone applications.
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Features
• Compliance with major ITU-T, TIA, and EIA international standards
to ensure compatibility with other modems.
• DTMF tone detection Distinguishes data, fax, or voice calls
(MT5634ZBAV only) with software packages supporting these features.
• Caller ID capability can identify a caller’s phone number (available
only on U.S. products).
• Serial port speeds to 230,400 bps.
• Limited warranty: Ten years (USA, UK, Canada, and Mexico)
Five years (all other countries)
Data
• Supports the K56flex™ standard for data transmission speeds up to
56K bps while maintaining compatibility with lower-speed modems.
• Can be flash-upgraded to the ITU-T V.90 56K bps standard (when
available).
• Supports the enhanced ITU-T V.34 standard, with data transmission
speeds to 33.6K bps.
• Supports asynchronous data rates at 56K, 33.6K, 31.2K, 28.8K,
26.4K, 24K, 21.6K, 19.2K, 16.8K, 14.4K, 12K, 9600, 4800, 2400,
1200, and 300 bps.
• Supports automatic fallback to slower speeds in noisy line conditions, and fall-forward to faster speeds as conditions improve.
• ITU-T V.42 LAP-M and MNP Class 3 and 4 error correction.
• ITU-T V.42bis (4-to-1) and MNP 5 (2-to-1) data compression.
• Automatically disables data compression when transferring alreadycompressed files.
• Autodial, redial, pulse (rotary) and touch-tone dial.
• Dial tone and busy signal detection for reliable call-progress reporting.
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3 Features
• Compatible with the standard AT command set used by most communication programs.
• Supports the ITU-T V.80 standard for H.324 video conferencing.
Fax
• Supports V.17, Group 3 fax communication standards, allowing it to
communicate with other fax modems as well as with fax machines.
• Responds to EIA/TIA Class 1 and 2 fax commands, enabling it to
exchange editable and encrypted faxes with Windows 95 computers.
• Sends and receives faxes from your computer at 14,400 bps, 9600
bps, 7200 bps, 4800 bps, 2400 bps, or 300 bps.
Voice (MT5634ZBAV only)
• Full-duplex speakerphone support with adjustable speaker volume
control. Can record and play back answering machine messages
using optional microphone and speaker.
• Remote/local telephone answering machine (TAM) capabilities include voice mail control, record/playback, and call screening.
• Supports the TIA/EIA IS-101 AT+V voice command set.
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Required Equipment
In addition to the contents of your modem package, you need the following equipment.
Computer
Your modem can be connected to any computer with an RS-232/V.24
serial port, such as most PCs. It can also be connected to the RS-422
serial ports on Apple Macintosh computers.
To use the modem at its highest speeds, a PC must have either of the
following:
A serial port with a 16550AFN UART
A Multi-Tech ISI (Intelligent Serial Interface) card, such as the
ISI551 (single port), ISI552 (dual port), or ISI608 (8 ports)
These devices can handle serial port rates up to 115,200 bps, which is
sufficient for all uploads and most 56K downloads. For downloading
highly compressible files at 56K speeds, however, your serial port
should be capable of speeds to 230,400 bps.
Serial Cable
To connect the modem to your computer, you must provide a shielded
serial cable, obtainable at computer stores and many office supply
stores. The cable should have a male DB-25 connector at the modem
end. For PCs, the other end may have a male DB-25 connector or a
female DB-9 connector, depending on your particular computer and
whether you are using the COM1 or the COM2 serial port.
Most Macintosh computers require a round, 8-pin, mini-DIN connector.
The Macintosh serial cable should be wired for hardware flow control.
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3 Features
Telephone Line
You must have a telephone line with jack (connector) that accepts the
cable that comes with the modem. If you do not have a telephone jack
near your computer, you should install one before proceeding.
In North America, do-it-yourself telephone extension kits and accessories are available wherever telephones are sold. You may also hire an
independent contractor or your local telephone company to install an
extension. If you want a separate line for your fax modem, you must
contact your telephone company.
Communications Software
To operate your modem, you must have data communications (datacomm) and fax communications software (included with the modem).
Data communications software simplifies control of the modem by guiding you through the process of selecting your serial port, your port
speed, and other variables, and then storing your settings, including
frequently called phone numbers, so they can be recalled with the
stroke of a key or the click of a mouse. Data communications software
must be set up, or configured, before you can use it.
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Connections
To use your modem, you must connect it to your computer (“RS232”), to a
telephone line (“LINE”), and to a power source (“PWR”). The North American model can also be connected directly to a telephone set (“PHONE”).
PWR RS232 PHONE LINE
Figure 3-1. Power and communications connectors.
For voice mail or speakerphone use, the MT5634ZBAV model can optionally be connected to a microphone and an external speaker.
SPKR MIC
OFF ON
Figure 3-2. MT5634ZBAV speaker and microphone connectors.
Connecting to the Computer (“RS232”)
Using a matching serial cable, connect the RS232 connector on the
modem to one of the serial port connectors on the back of your computer. On a PC, there are usually two serial ports named “COM1” and
“COM2.” COM1 typically uses a DB-9 connector, whereas COM2 may
use a DB-25 connector. Most Apple Macintosh computers use round
mini-DIN-8 connectors for the serial ports. Choose the one marked with
the icon of a telephone; the Macintosh gives priority to that port and will
not interrupt your communications link. Be sure to tighten the mounting
screws on the DB connectors.
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Connecting to the Telephone Line (“LINE”)
Plug one end of the cable provided with the modem into the telephone
jack in your home or office. Plug the other end into the LINE jack on the
modem.
Note: The LINE jack is not interchangeable with the PHONE jack. Do
not plug the telephone into the LINE jack or the line cable into the
PHONE jack.
Note: The Federal Communications Commission (FCC), Industry Canada, the British Approvals Board for Telecommunications (BABT), and
other regulatory agencies impose certain restrictions on equipment connected to public telephone systems. See Appendix A for more information.
Connecting to a Telephone Set (“PHONE”)
If you wish to connect a telephone to the same line as the modem, you
can plug it into the modem’s PHONE jack. This connector is provided
as a convenience; you can also connect your telephone to a duplex
jack inserted into your wall jack. U.K. and international models do not
have a PHONE jack.
Note: The PHONE jack is not interchangeable with the LINE jack; do
not plug the telephone into the LINE jack or the line cable into the
PHONE jack.
Connecting to a Microphone (“MIC”)
To use the MT5634ZBAV modem for speakerphone or voice mail applications, plug a microphone into the MIC jack of the modem. The micro-
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User Guide
phone should have a 1/8-inch stereo plug and should not be amplified.
Do not use a microphone with a mono jack
Note: To avoid feedback, place the microphone away from your speakers.
Connecting to a Speaker (“SPKR”)
To use the MT5634ZBAV modem for speakerphone or voice mail applications, plug an amplified speaker with a 1/8-inch stereo plug into the
SPKR jack of the modem. If you use a mono speaker, you must change
the speaker mode jumper as described in Chapter 2.
Connecting to a Sound Card (“SPKR”)
If a sound card and speakers are installed in your system, you can connect the SPKR jack of the modem to the LINE IN jack of the sound
card. Use a male-to-male stereo patch cord with 1/8-inch plugs.
Connecting to Power (“PWR”)
Low voltage DC power is supplied to the modem through a modular
power supply included with the modem. Plug the power supply module
into a convenient AC power outlet or surge protector. Plug the connector
on the other end of the power cord into the PWR jack on the modem. A
power ON/OFF switch is located on the right side of the modem.
Note: Use only the power supply supplied with the modem. Use of any
other power supply will void the warranty and could damage the modem.
As soon as you apply power to the modem, it will perform a diagnostic
self-test, indicated by the speed LEDs flashing in sequence for approximately two seconds, after which the 56 indicator should light. If this
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3 Features
does not happen, check that the power switch is on, the power supply
is solidly connected, and the AC outlet is live.
Surge Protectors and Lightning
Your modem has self-resetting lightning protection to protect it from
electrical spikes on the telephone line. Nonetheless, power surges and
other transient voltages on power lines, such as those caused by lightning strikes, can damage or destroy your modem. Therefore, we recommend that you plug the modem into a surge protector rather than
directly into a wall outlet, preferably a surge protector that provides protection against electrical spikes on the telephone line as well as on the
power line. Note that not even a surge protector can guard against
damage from a nearby lightning strike. During an electrical storm, your
safest course is to unplug your computer equipment from both the power outlet and the telephone line.
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Front Panel
Figure 3-3. Front panel
The MT5634ZBA has ten LED indicators on the front panel that indicate
status, configuration, and activity:
Transmit Data. The TD LED flashes when the modem is transmit-
TD
ting data to another modem. The state of the LED matches the TD
circuit on pin 2 of the RS-232C/V.24 interface.
Receive Data. The RD LED flashes when the modem is receiving
RD
data from another modem. The state of the LED matches that of
the RD circuit on pin 3 of the RS-232C/V.24 interface.
Carrier Detect. The CD LED lights when the modem detects a
CD
valid carrier signal from another modem. It is on when the modem
is communicating with the other modem and off when the link is
broken.
56K Mode (56,000–32,000 bps). The 56 LED lights whenever the
56
modem connects to an ISP server in K56flex or V.PCM mode. The
actual connection speed depends on server capabilities and line
conditions.
V.34 Mode (33,600–16,800 bps). The 33 LED lights whenever the
33
modem connects in V.34 mode.
V.32bis Mode (14,400 bps–). The 14 LED lights whenever the
14
modem connects in V.32bis mode.
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3 Features
Note: Although the modem can connect at lower than V.32bis
speeds, no speed indicator lights during the connection.
Off-Hook. The OH LED lights when the modem is off-hook, which
OH
occurs when the modem is dialing, online, or answering a call. The
LED flashes when the modem pulse-dials.
Terminal Ready. The TR LED lights when a datacomm program
TR
initializes the modem. It means the modem is ready for an outgoing or incoming call. It goes off when the datacomm program
disconnects the COM port. When it goes off, a connected modem
will disconnect. The state of the TR LED matches that of the DTR
circuit on pin 20 of the RS-232C/V.24 interface.
Error Correction (V.42). The EC LED lights continuously when
EC
the modem is in V.42 error correction mode, and blinks when compression is activated.
Fax. The FX LED lights when the modem is in fax mode.
FX
Note: When you turn on the modem, the speed lights flash briefly as
the modem does a self-test, then the LED for the default modem baud
rate lights. The default rate for the modem is 56K bps unless you select
and store another baud rate. After a call, the LEDs for the connection’s
baud rate remain lit until another call is made or the modem is reset. If
you connect at a rate under 14,400 bps, all speed LEDs remain off after
the connection is broken, even though the modem is still turned on.
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4
AT Commands,
S-Registers &
Result Codes
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User Guide
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4 AT Commands, S-Registers, and Result Codes
AT Commands
AT commands are used to control the operation of your modem. They
are so called because each command must be preceded by the characters AT to get the ATtention of the modem.
AT commands can be issued only when the modem is in command
mode or online command mode. The modem is in
whenever it is not connected to another modem. The modem is in
mode
whenever it is connected to another modem and ready to exchange data.
can issue commands to the modem while connected to another modem. To put the modem into online command mode from data mode,
you must issue an
AT
characters and the command, e.g., +++ATH to hang up the modem.
To return to data mode from online command mode, you must issue the
command ATO.
To send AT commands to the modem you must use a communications
program, such as the HyperTerminal applet in Windows 95 and NT 4.0,
or the communications program included with your modem. You can
issue commands to the modem either directly, by typing them in the
terminal window of the communications program, or indirectly, by configuring the operating system or communications program to send the
commands automatically. Fortunately, communications programs make
daily operation of modems effortless by hiding the commands from the
user. Most users, therefore, need to use AT commands only when reconfiguring the modem, e.g., to turn autoanswer on or off.
The format for entering an AT command is ATXn, where X is the command and n is the specific value for the command, sometimes called
the command
zero, you can omit it from the command; thus, AT&W is equivalent to
AT&W0. Most commands have a
is set at the factory. The default values are shown in the “AT Command
Summary,” which begins on the next page.
Online command mode
escape sequence
parameter
. The value is always a number. If the value is
default
is a temporary state in which you
(+++) followed immediately by the
value, which is the value that
command mode
data
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You must press ENTER to send the command to the modem. Any time
the modem receives a command, it sends a response known as a
code
. The most common result codes are OK,
NECT
messages that the modem sends to the computer when it is connecting to another modem. For a table of valid result codes, see “Result
Codes” at the end of this chapter.
You can issue several commands in one line, in what is called a command
string
press ENTER. Spaces to separate the commands are optional; they are
ignored by the command interpreter. The most familiar command string
is the
is turned on or reset, or when your communications software calls another modem.
. The command string begins with AT and ends when you
initialization string
, which is used to configure the modem when it
ERROR
, and the
result
CON-
AT Command Summary
Command: AT Attention Code
Values: n/a
Description: The attention code precedes all command lines
except A/, A:, and escape sequences.
Command: ENTER Key
Values: n/a
Description: Press the ENTER (RETURN) key to execute most
commands.
Command: A Answer
Values: n/a
Description: Answer call before final ring.
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4 AT Commands, S-Registers, and Result Codes
Command: A/ Repeat Last Command
Values: n/a
Description: Repeat the last command string. Do not precede
this command with AT. Do not press ENTER to
execute.
Command: B
Values:
Default: 1 and 16
Description: B0 Select ITU-T V.22 mode when modem is at 1200
Command: C
Values:
Default: 1
Description: C0 Transmit carrier always off. (Not supported.)
Command: D
Values:
Default: none
Description: Dial telephone number s, where s may up to 40
n
Communication Standard Setting
n
= 0–3, 15, 16
bps.
B1 Select Bell 212A when modem is at 1200 bps.
B2 Deselect V.23 reverse channel (same as B3).
B3 Deselect V.23 reverse channel (same as B2).
B15 Select V.21 when the modem is at 300 bps.
B16 Select Bell 103J when the modem is at 300 bps.
n
Carrier Control
n =
1
C1 Normal transmit carrier switching (included for
backward compatibility with some software).
s
Dial
s
= dial string (phone number and dial modifiers)
characters long and include the 0–9, *, #, A, B,
C, and D characters, and the L, P, T, V, W, S,
comma (,), semicolon (;), !, @, ^ and $ dial string
modifiers.
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Dial string modifiers:
L Redial last number. (Must be placed immedi-
ately after ATD.)
P Pulse-dial following numbers in command.
T Tone-dial following numbers in command (de-
fault).
V Switch to speakerphone mode and dial the
following number. Use ATH command to hang
up.
W Wait for a new dial tone before continuing to
dial. (X2, X4, X5, X6, or X7 must be selected.)
, Pause during dialing for time set in register S8.
; Return to command mode after dialing. (Place
at end of dial string.)
! Hook flash. Causes the modem to go on-hook
for one-half second, then off-hook again.
@ Wait for quiet answer. Causes modem to wait
for a ringback, then 5 seconds of silence,
before processing next part of command. If
silence is not detected, the modem returns a
NO ANSWER code.
^ Disable data calling tone transmission.
$ Detect AT&T call card “bong” tone. The char-
acter should follow the phone number and
precede the user’s call card number:
ATDT1028806127853500$123456789
Command: DS=yDial Stored Telephone Number
Values:
Default: none
Description: Dial a number previously stored in directory num-
50
n
= 0–3
ber y by the
Example: ATDS=3
&Zy=x
command.
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4 AT Commands, S-Registers, and Result Codes
Command: E
Values:
Default: 1
Description: E0 Do not echo keyboard input to the terminal.
Command: F
Values:
Default: 1
Description: F0 Enable online data character echo. (Not sup-
Command: H
Values:
Default: 0
Description: H0 Go on-hook (hang up).
Command: I
Values:
Default: None
Description: I0 Display default speed and controller firmware
n
Echo Command Mode Characters
n
= 0 or 1
E1 Do echo keyboard input to the terminal.
n
Echo Online Data Characters
n =
1
ported.)
F1 Disable online data character echo (included for
backward compatibility with some software).
n
Hook Control
n
= 0 or 1
H1 Go off-hook (make the phone line busy).
n
Information Request
n
= 0–5, 9, 11
version.
I1 Calculate and display ROM checksum (e.g.,
12AB
I2 Check ROM and verify the checksum, displaying
I3 Display default speed and controller firmware
I4 Display firmware version for data pump (e.g., 94).
I5 Display the board ID: software version, hardware
).
OK
or
ERROR
.
version.
version, and country ID
51
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I9 Display the country code (e.g.,
I11 Display diagnostic information for the last modem
connection, such as DSP and firmware version,
link type, line speed, serial speed, type of error
correction/data compression, number of past
retrains, etc.
Command: L
Values:
Default: 2
Description: L0 Select low volume.
Command: M
Values:
Default: 1
Description: M0 Speaker always off.
Command: N
Values:
Default: 1
Description: N0 Modem performs handshake only at communica-
52
n
Monitor Speaker Volume
n
= 0, 1, 2, or 3
L1 Select low volume.
L2 Select medium volume.
L3 Select high volume.
n
Monitor Speaker Mode
n
= 0, 1, 2, or 3
M1 Speaker on until carrier signal detected.
M2 Speaker always on when modem is off-hook.
M3 Speaker on until carrier is detected, except while
dialing.
n
Modulation Handshake
n
= 0 or 1
tion standard specified by
mand.
N1 Modem begins handshake at communication
standard specified by
During handshake, fallback to a lower speed can
occur.
S37
NA Ver. 1
S37
and the B com-
and the B command.
).
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4 AT Commands, S-Registers, and Result Codes
Command: O
Values: 0, 1, 3
Default: None
Description: O0 Exit online command mode and return to data
Command: P Pulse Dialing
Values: P, T
Default: T
Description: Configures the modem for pulse (non-touch-tone)
Command: Q
Values:
Default: 0
Description: Q0 Enable result codes.
Command: Sr=nSet Register Value
Values:
Default: None
Description: Set value of register Sr to value of n, where n is
n
Return Online to Data Mode
mode (see
O1 Issue a retrain and return to online data mode.
O3 Issue a rate renegotiation and return to data
mode.
dialing. Dialed digits are pulsed until a T com-
mand or dial modifier is received.
n
Result Codes Enable/Disable
n
= 0 or 1
Q1 Disable result codes.
Q2 Returns an
some software.
r
= S-register number; n varies
entered in decimal format. E.g., S0=1.
+++AT<CR>
OK
for backward compatibility with
escape sequence ).
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Command: Sr? Read Register Value
Values:
Default: None
Description: Read value of register Sr and display it in 3-digit
Command: T Tone Dialing
Values: P, T
Default: T
Description: Configures the modem for DTMF (touch-tone)
r
= S-register number
decimal form. E.g., S2? gives the response
dialing. Dialed digits are tone dialed until a
command or dial modifier is received.
043
P
.
Command: V
Values:
Default: 1
Description: V0 Displays result codes as digits (terse response).
Command: WnResult Code Options
Values:
Default: 2
Description: W0 CONNECT result code reports serial port speed,
Command: X
Values:
Default: 4
Description: X0 Basic result codes (
54
n
Result Code Format
n
= 0 or 1
V1 Displays result codes as words (verbose response).
n
= 0, 1, or 2
disables protocol result codes.
W1 CONNECT result code reports serial port speed,
enables protocol result codes.
W2 CONNECT result code reports line speed, en-
ables protocol result codes.
n
Result Code Selection
n
= 0–7
look for dial tone or busy signal.
e.g., CONNECT
); does not
Page 65
4 AT Commands, S-Registers, and Result Codes
X1 Extended result codes (
V42bis
); does not look for dial tone or busy sig-
nal.
X2 Extended result codes with
not look for busy signal.
X3 Extended result codes with
for dial tone.
X4 Extended result codes with
BUSY
X5 Extended result codes with
X6 Extended result codes with
X7 Basic result codes with
Command: Y
Values:
Default: 0
Description: Y0 Disable sending or responding to long space
Command: Z
Values:
Default: None
Description: Z0 Reset modem to profile saved by the last
n
Y1 Enable sending or responding to long space
n
Z1 Same as Z0.
.
BUSY
.
BUSY
.
BUSY
.
Long Space Disconnect
n
= 0
break signal on disconnect.
break signal on disconnect. (Not supported.)
Modem Reset
n
= 0 or 1
command.
e.g., CONNECT 46000
NO DIALTONE
BUSY
; does not look
NO DIALTONE
NO DIALTONE
NO DIALTONE
NO DIALTONE
and
&W
; does
and
and
and
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Command: &BnV.32 Auto Retrain
Values:
Default: 1
Description: &B0 Disable V.32 auto retrain. (Not supported.)
Command: &CnData Carrier Detect (DCD) Control
Values:
Default: 1
Description: &C0 Forces the DCD circuit to be always high.
Command: &DnData Terminal Ready (DTR) Control
Values:
Default: 2
Description: &D0 Modem ignores the true status of the DTR signal
n
= 1
&B1 Enable V.32 auto retrain.
n
= 0 or 1
&C1 DCD goes high when the remote modem’s carrier
signal is detected, and goes low when the carrier
signal is not detected.
n
= 0, 1, 2, or 3
and responds as if it is always on.
&D1 If DTR drops while in online data mode, the mo-
dem enters command mode, issues an OK, and
remains connected.
&D2 If DTR drops while in online data mode, the mo-
dem hangs up. If the signal is not present, the
modem will not answer or dial.
&D3 If DTR drops, the modem hangs up and resets as
if an ATZ command were issued.
56
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4 AT Commands, S-Registers, and Result Codes
Command: &FnLoad Factory Settings
Values:
Default: None
Description: &F0 Load factory settings as active configuration.
Note: See also the Z command.
Command: &GnV.22bis Guard Tone Control
Values:
Default: 0
Description: &G0 Disable guard tone.
Note: The
Command: &JnAuxiliary Relay Control
&G
Values: n
Default: 0
Description: &J0 The auxiliary relay is never closed.
Command: &KnFlow Control Selection
Values:
Defaults: 3
Description: &K0 Disable flow control.
n
= 0
n
= 0, 1, or 2
&G1 Set guard tone to 550 Hz.
&G2 Set guard tone to 1800 Hz.
command is not used in North America.
= 0
&J1 Not supported—responds
n
= 0, 3, or 4
&K3 Enable CTS/RTS hardware flow control.
&K4 Enable XON/XOFF software flow control.
ERROR
.
Command: &MnCommunications Mode
Values:
Defaults: 0
Description: &M0 Asynchronous mode.
n
= 0
&M1 Not supported—responds
ERROR
.
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Command: &QnAsynchronous Communications Mode
Values:
Default: 5
Description: &Q0 Asynchronous with data buffering. Same as
Command: &SnData Set Ready (DSR) Control
Values:
Default: 0
Description: &S0 Force DSR always high (on).
Command: &TnV.54 Test Commands
Values:
Default: None
Description: &T0 Abort. Stop any test in progress.
Note: To stop a test, you must use the escape sequence (+++AT)
before typing AT&T0.
n
= 0, 5, 6, 8, or 9
&Q5 Error control with data buffering. Same as
&Q6 Asynchronous with data buffering. Same as
&Q8 MNP error control mode. If MNP error control is
not established, the modem falls back according
to the setting in
&Q9 V.42 or MNP error control mode. If neither error
control is established, the modem falls back according to the setting in
n
= 0 or 1
&S1 Let DSR go high only during a connection.
n
= 0, 1, 3 or 6
&T1 Local analog loopback test.
&T3 Local digital loopback test.
&T6 Remote digital loopback test.
S36
.
S36
.
\N3
\N0
\N0
.
.
.
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4 AT Commands, S-Registers, and Result Codes
Command: &V Display Current Settings
Values: n/a
Description: Displays the active modem settings, including the
Command: &WnStore Current Configuration
Values:
Default: None
Description: &W0 Stores current modem settings in nonvolatile
Command: &YnSelect Stored Configuration for Hard Reset
Values:
Default: 0
Description: &Y0 Select stored configuration 0 on power-up. (For
callback security settings if callback security is
enabled. If the setup password has been entered, it
also displays the callback security passwords.
n
= 0
memory and causes them to be loaded at power-
on or following the ATZ command instead of the
factory defaults. See also the &F command.
&W1 Clears user default settings from nonvolatile
memory and causes the factory defaults to be
loaded at power-on or following the ATZ com-
mand.
n
= 0
backward compatibility with some software.)
&Y1 Not supported—responds
ERROR
.
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User Guide
Command: &Zy=xStore Dialing Command
Values:
Default: None
Description: Stores dialing command x in memory location y.
Command: &&S Speaker Codec Loopback
Values: n/a
Description: Provides a loopback from the microphone to the
Command: \AnSelect Maximum MNP Block Size
Values:
Default: 3
Description: \A0 64-character maximum.
Command: \BnTransmit Break
Values:
Default: 3
Description: In non-error-correction mode only, sends a break
y
= 0–3 (callback security disabled) or 0–29
(callback security enabled)
x = Dialing command
Dial the stored number using the command
ATDS=y. See also the
callback security options, see Chapter 6.
speaker.
n
\A1 128-character maximum.
\A2 192-character maximum.
\A3 256-character maximum.
n
signal of the specified length to a remote modem.
Works in conjunction with the \K command.
For testing and debugging only.
= 0, 1, 2, or 3
= 0–9 in 100 ms units
#CBSn
command. For
60
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4 AT Commands, S-Registers, and Result Codes
Command: \GnModem Port Flow Control
Values:
Default: 0
Description: \G0 Returns an
Command: \JnData Buffer Control
Values:
Default: 0
Description: \J0 Enable data buffer—serial port speed is indepen-
Command: \KnBreak Control
Values:
Default: 5
Description: Controls the response of the modem to a break
n
= 0
OK
some software.
\G1 Not supported—responds
n
= 0
dent of connect speed.
\J1 Disable data buffer—serial port speed is forced
to the line speed.
n
= 0–5
received from the computer, the remote modem,
or the \B commnd. The response is different for
each of three different states.
Data mode. The modem receives the break from
the computer:
\K0 Enter online command mode, no break sent to
the remote modem.
\K1 Clear data buffers and send break to the remote
modem.
\K2 Same as
\K3 Send break immediately to the remote modem .
\K4 Same as
\K5 Send break to the remote modem in sequence
with the transmitted data.
for backward compatibility with
ERROR
\K0
.
\K0
.
.
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User Guide
Data mode. The modem receives the break from
the remote modem:
\K0 Clear data buffers and send break to the com-
puter.
\K1 Same as
\K2 Send break immediately to the computer.
\K3 Same as
\K4 Send break to the computer in sequence with the
received data.
\K5 Same as
Online command mode. The modem receives a
\Bn
\K0 Clear data buffers and send break to the remote
modem.
\K1 Same as
\K2 Send break immediately to the remote modem.
\K3 Same as
\K4 Send break to the remote modem in sequence
with the transmitted data.
\K5 Same as
Command: \NnError Correction Mode Selection
Values:
Default: 3
Description: \N0 Non-error correction mode with data buffering
n
(buffer mode; same as
\N1 Direct mode.
\N2 MNP reliable mode. If the modem cannot make
an MNP connection, it disconnects.
\N3 V.42/MNP auto-reliable mode. The modem at-
tempts first to connect in V.42 error correction
mode, then in MNP mode, and finally in non-error-
correction (buffer) mode with continued operation.
\K0
.
\K2
.
\K4
.
command from the computer:
\K0
.
\K2
.
\K4
.
= 0–5, or 7
&Q6
).
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4 AT Commands, S-Registers, and Result Codes
\N4 V.42 reliable mode.If the modem cannot make a
V.42 connection, it disconnects.
\N5 V.42, MNP, or non-error correction (same as
\N7 V.42, MNP, or non-error correction (same as
Command: \QnFlow Control Selection
Values:
Default: 3
Description: \Q0 Disable flow control (same as
Command: \TnInactivity Timer
Values:
Default: 0
Description: \Tn Sets the time (in minutes) after the last character
Note: You can also set the inactivity timer by changing the value of
Command: \VnProtocol Result Code
Values:
Default: 1
Description: \V0 Disable the appending of the protocol result code
n
= 0, 1, or 3
&K0
\Q1 XON/XOFF software flow control (same as
\Q2 CTS-only flow control. Not supported.
\Q3 RTS/CTS hardware flow control (same as
n
= 0, 1–255
is sent or received that the modem waits before
disconnecting. A value of zero disables the timer.
Applies only in buffer mode.
n
= 0, 1, or 2
to the DCE speed.
\V1 Enable the appending of the protocol result code
to the DCE speed.
\V2 Same as
\V1
.
).
\N3
\N3
&K4
&K3
S30
).
).
).
.
).
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User Guide
Command: \XnXON/XOFF Pass-Through
Values:
Defaults: 0
Description: \X0 Modem responds to and discards XON/XOFF
Command: -CnData Calling Tone
Values:
Defaults: 0
Description: -C0 Disable V.25 data calling tone to deny remote
Command: %B View Numbers in Blacklist
Values: n/a
Description: If blacklisting is in effect, AT%B displays the
Command: %CnData Compression Control
Values:
Default: 1
Description: %C0 Disable V.42bis/MNP 5 data compression.
n
= 0 or 1
characters.
\X1 Modem responds to and passes XON/XOFF
characters.
n
= 0 or 1
data/fax/voice discrimination.
-C1 Enable V.25 data calling tone to allow remote
data/fax/voice discrimination.
numbers for which the last call attempted in the
previous two hours failed. In countries that do not
require blacklisting, the
pears.
n
= 0 or 1
%C1 Enable V.42bis/MNP 5 data compression.
ERROR
result code ap-
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4 AT Commands, S-Registers, and Result Codes
Command: %DCnAT Command Control
Values:
Default: 0
Description: %DC0 The modem responds to AT commands.
Note: The modem will respond to AT%DC for 10 seconds after power-up.
Command: %EnFallback and Fall Forward Control
Values:
Default: 2
Description: %E0 Disable fallback and fall forward.
Command: $DnDTR Dialing
Values:
Default: 0
Description: $D0 Disables DTR dialing.
Command: $EBnAsynchronous Word Length
Values:
Default: 0
Description: $EB0 Enables 10-bit mode.
n
= 0 or 1
%DC1 The modem ignores AT commands.
n
= 0, 1, or 2
%E1 Enable fallback, disable fall forward.
%E2 Enable fallback and fall forward.
n
= 0 or 1
$D1 Dials the number in memory location 0 when
DTR goes high.
n
= 0 or 1
$EB1 Enables 11-bit mode.
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User Guide
Command: +ES=nEnable Synchronous Buffered Mode
Values:
Default: None
Description: Allows an H.324 video application direct access
Command: #CBAnCallback Attempts
Values:
Default: 4
Description: Sets the number of callback attempts that are
Command: #CBDnCallback Delay
Values:
Default: 15
Description: Sets the length of time (in seconds) that the mo-
Command: #CBF? Callback Failed Attempts Display
Values: n/a
Default: n/a
Description: Requests the number of failed callback pass-
n
= 6
to the synchronous data channel. On underflow,
the modem sends HDLC flag idle (0x7E) to the
remote modem.·This special error control mode
is overridden by any of the following commands:
&F, &M, &Q
AT+ES=? shows the only allowed value.
AT+ES? shows the current value.
n
= 1–255
allowed after passwords have been exchanged
between modems.·
n
= 0–255
dem waits before calling back the remote modem.
words since reset or power-up. This number can
be stored to nonvolatile memory using the
command.
, or \N.
&W
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4 AT Commands, S-Registers, and Result Codes
Command: #CBFR Callback Failed Attempts Reset
Values: n/a
Default: n/a
Description: Resets the number of failed callback passwords
Command: #CBInLocal Callback Inactivity Timer
Values:
Default: 20
Description: Sets the time (in minutes) that the modem waits
to 0. This does not reset the number stored in
nonvolatile memory.
n
= 1–255
for a command before forcing the user to enter
the setup password again.
Command: #CBN
Values:
Defaults: None
Description: Sets the callback security password for the
Command: #CBPnCallback Parity
Values: n
Default: 0
Description: Sets parity for the callback security messages.
y=x
Store Callback Password
y
= 0–29
x = password
memory location. The password must have 6 to
10 characters, and cannot include the + or
characters.
= 0, 1, or 2
#CBP0 No parity.
#CBP1 Odd parity.
#CBP2 Even parity.
y
-
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User Guide
Command: #CBRy Callback Security Reset
Values:
Default: None
Description: Clears the password and phone number in the
Command: #CBSnCallback Enable/Disable
Values: n
Default: 0
Description: #CBS0 Disable callback security.
#CBS1 Enable local and remote callback security.
#CBS2 Enable remote callback security only.
#CBS3 Disable callback security until local hangup or
y
= 0–29
memory location.
= 0, 1, 2, or 3
reset.
y
Command: #P
Values: n
Default: 2
Description: #P0 No parity.
Command: #S
Values:
Default: MTSMODEM
Description: Enters the remote configuration setup password.
Command: #S=xStore Setup Password
Values:
Default: MTSMODEM
Description: Stores a new remote configuration setup password.
68
n
Set 11-bit Parity
= 0 or 1
#P1 Odd parity.
#P2 Even parity.
x
Enter Setup Password
x
= password (1–8 characters, case sensitive)
x
= password (1–8 characters, case sensitive)
Page 79
4 AT Commands, S-Registers, and Result Codes
Command: +++AT<CR> Escape Sequence
Values: n/a
Description: Puts the modem in command mode (and option-
Command: %%%AT<CR> Remote Configuration Escape Sequence
Values: n/a
Description: Initiates remote configuration mode while online
ally issues a command) while remaining online.
Type +++AT and up to ten command characters,
then press ENTER. Used mostly to issue the
hang-up command: +++ATH<CR>.
with remote modem. The remote configuration
escape character (%) is defined in register
S13
.
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User Guide
S-Registers
Certain modem values, or parameters, are stored in memory locations
called S-registers. Use the S command to read or to alter the contents of
S-registers (see previous section).
Register Unit Range Default Description
S0
S1
S2
S3
S4
S5
S6
1 ring 0, 1–255 1 Sets the number of rings until
the modem answers.
ATS0=0 disables autoanswer
completely.
1 ring 0–255 0 Counts the rings that have
occurred.
decimal 0–127 43 (+) Sets ASCII code for the
128–255 escape sequence character.
Values greater than 127
disable escape.
decimal 0–127 13 (^M) Sets the ASCII code for the
carriage return character.
decimal 0–127 10 (^J) Sets the ASCII code for the
line feed character.
decimal 0–32 8 (^H) Sets the ASCII code for the
33–127 backspace character. Values
greater than 32 disable
backspace.
seconds 2–65* 2* Sets the time the modem
waits after it goes off-hook
before it begins to dial the
telephone number.
* These values may be different outside North America.
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4 AT Commands, S-Registers, and Result Codes
Register Unit Range Default Description
S7
S8
S9
S10
S11
S28
S30
S35
seconds 1–255* 50* Sets the time the modem
waits for a carrier signal
before aborting a call. Also
sets the wait for silence time
for the @ dial modifier.
seconds 0–65 2 Sets the length of a pause
caused by a comma
character in a dialing
command.
decimal 0, 1–127 37 (%) Sets ASCII code for remote
configuration escape
character. S9=0 disables
remote configuration.
100 ms 1–254 20 Sets how long a carrier signal
must be lost before the
modem disconnects.
1 ms 50–150* 95* Sets spacing and duration of
dialing tones.
decimal 0, 1–255 1 0 disables, 1–255 enables
V.34 modulation.
1 minute 0, 1–255 0 Sets the length of time that
the modem waits before
disconnecting when no data
is sent or received. A value of
zero disables the timer. See
also the \T command
decimal 0–1 0 0 disables, 1 enables the V.25
data calling tone, which
allows remote data/fax/voice
discrimination.
* These values may be different outside North America.
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User Guide
Register Unit Range Default Description
S36
S37
decimal 0–7 7 Specifies the action to take in
the event of a negotiation
failure when error control is
selected. (See
decimal 0–19 0 Sets the maximum V.34
“upstream” speed at which
the modem attempts to
connect.
0 = maximum modem speed
1 = reserved
2 = 1200/75 bps
3 = 300 bps
4 = reserved
5 = 1200 bps
6 = 2400 bps
7 = 4800 bps
8 = 7200 bps
9 = 9600 bps
10 = 12000 bps
11 = 14400 bps
12 = 16800 bps
13 = 19200 bps
14 = 21600 bps
15 = 24000 bps
16 = 26400 bps
17 = 28800 bps
18 = 31200 bps
19 = 33600 bps
S48
.)
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4 AT Commands, S-Registers, and Result Codes
Register Unit Range Default Description
S38
S42
S43
decimal 0–14 1 Sets the maximum 56K
decimal 0–1 1 Enables/disables the 56K
decimal 0–1 1
“downstream” speed at which
the modem attempts to
connect. The default
maximum speed is 56K bps.
0 = 56K disabled
1 = 56K enabled with auto-
matic speed selection at
maximum modem speed
2 = 32000 bps
3 = 34000 bps
4 = 36000 bps
5 = 38000 bps
6 = 40000 bps
7 = 42000 bps
8 = 44000 bps
9 = 46000 bps
10 = 48000 bps
11 = 50000 bps
12 = 52000 bps
13 = 54000 bps
14 = 56000 bps
auto rate. When 56K auto is
disabled, fallback to V.34 is
also disabled. 0 = disable;
1 = enable.
For For testing and
debugging only.
disables V.32bis start-up
auto mode operation. 0 =
disable; 1 = enable.
Enables/
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User Guide
Register Unit Range Default Description
S48
decimal 7 or 128 7 Enables (7) or disables (128)
LAPM negotiation. The following table lists the
S48
configuration settings for
certain types of connections.
S48=7 S48=128
S36=0, 2
S36=1, 3
S36=4, 6
S36=5, 7
LAPM or hangup Do not use
LAPM or async Async
LAPM, MNP, or hangup MNP or hangup
LAPM, MNP, or aysnc
MNP or async
S36
and
S89
S108
74
seconds 0, 5–255 10 Sets the length of time in the
off-line command mode before the modem goes into
standby mode. A value of
zero prevents standby mode;
a value of 1–4 sets the value
to 5.
decimal 0–3, 6, 7 6 Selects the 56K digital loss if
using the modem thru a PBX
line. The default value is -6
dB loss, the value used when
calling from a typical POTS
line long distance.
0 = -0 dB digital loss, no
robbed-bit signaling
1 = -3 dB PBX digital loss
2 = -2 dB digital loss
3 = -3 dB digital loss
6 = -6 dB digital loss
7 = -0 dB digital loss with
robbed-bit signaling
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4 AT Commands, S-Registers, and Result Codes
Result Codes
In command mode your modem can send responses called
to your computer. Result codes are used by communications programs
and can also appear on your monitor.
Terse Verbose Description
0OK
1 CONNECT
2 RING
3 NO CARRIER
4 ERROR
5 * CONNECT 1200
6 NO DIALTONE
7 BUSY
8 NO ANSWER
10 * CONNECT 2400
11 * CONNECT 4800
12 * CONNECT 9600
13 * CONNECT 14400
14 * CONNECT 19200
24 * CONNECT 7200
25 * CONNECT 12000
26 * CONNECT 16800
40 * CONNECT 300
55 * CONNECT 21600
56 * CONNECT 24000
57 * CONNECT 26400
58 * CONNECT 28800
59 * CONNECT 31200
60 * CONNECT 33600
70 * CONNECT 32000
71 * CONNECT 34000
72 * CONNECT 36000
Command executed
Modem connected to line
Ring signal detected
Carrier signal lost or not detected
Invalid command
Connected at 1200 bps
No dial tone detected
Busy signal detected
No answer at remote end
Connected at 2400 bps
Connected at 4800 bps
Connected at 9600 bps
Connected at 14400 bps
Connected at 19200 bps
Connected at 7200 bps
Connected at 12000 bps
Connected at 16800 bps
Connected at 300 bps
Connected at 21600 bps
Connected at 24000 bps
Connected at 26400 bps
Connected at 28800 bps
Connected at 31200 bps
Connected at 33600 bps
Connected at 32000 bps, 56K rate
Connected at 34000 bps, 56K rate
Connected at 36000 bps, 56K rate
result codes
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User Guide
Terse Verbose Description
73 * CONNECT 38000
74 * CONNECT 40000
75 * CONNECT 42000
76 * CONNECT 44000
77 * CONNECT 46000
78 * CONNECT 48000
79 * CONNECT 50000
80 * CONNECT 52000
81 * CONNECT 54000
82 * CONNECT 56000
88 DELAYED
89 BLACKLISTED
90 BLACKLIST FULL
*
EC
is added to these result codes when the extended result codes configuration option is enabled.
pending on the type of error control connection:
V42bis
—V.42 error control (LAP-M) and V.42bis data compression
V42
—V.42 error control (LAP-M) only
MNP5
—MNP 4 error control and MNP 5 data compression
MNP4
—MNP 4 error control only
NoEC
—No error control protocol).
EC
Connected at 38000 bps, 56K rate
Connected at 40000 bps, 56K rate
Connected at 42000 bps, 56K rate
Connected at 44000 bps, 56K rate
Connected at 46000 bps, 56K rate
Connected at 48000 bps, 56K rate
Connected at 50000 bps, 56K rate
Connected at 52000 bps, 56K rate
Connected at 54000 bps, 56K rate
Connected at 56000 bps, 56K rate
Delay is in effect for the dialed
number
Dialed number is blacklisted
Blacklist is full
is replaced by one of the following codes, de-
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5
Remote
Configuration
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5 Remote Configuration
Introduction
Remote configuration is a network management tool that allows you to
configure modems anywhere in your network from one location. With
password-protected remote configuration, you can issue AT commands
to a remote MT5634ZBA or MT5634ZBAV modem for maintenance or
troubleshooting as if you were on-site.
Basic Procedure
The following steps are valid regardless of whether the connection is
established by the local or the remote Multi-Tech modem.
1. Establish a data connection with a remote MT5634ZBA or
MT5634ZBAV modem.
2. Send three remote configuration escape characters followed by AT
and the setup password, and press ENTER. Example:
%%%ATMTSMODEM<CR>. You have four tries to enter the correct
password before being disconnected. If the password is correct, the
remote modem responds with
OK
3. You can now send AT commands to configure the remote modem.
4. When you have finished configuring the remote modem, save the
new configuration by typing AT&W0<CR>, then type ATO<CR> to
exit remote configuration. You can then break the connection in the
normal way.
CAUTION: If you hang up while you are in remote configuration
mode, it may lock up the remote modem.
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Setup
Multi-Tech modems are shipped with a default setup password
(MTSMODEM). Because anyone who has an owner’s manual knows the
default setup password, for security you should change the password
and possibly also the remote configuration escape character.
Changing the Setup Password
1. Open a data communications program such as HyperTerminal.
2. In the terminal window, type AT#SMTSMODEM (or AT#Syyyyyy if
you have replaced the MTSMODEM password with yyyyyy) and
press ENTER. The modem responds with OK if the setup password
is correct, and ERROR if it is wrong.
3. To change the password, type AT#S=yyyyyy, where yyyyyy stands
for the password, and press ENTER. The password can include any
keyboard character, and must be one to eight characters long. The
modem responds with OK.
4. The new password is saved automatically. You can now either enter
more AT commands or exit the data communications program. The
next time you remotely configure the modem you must use the new
setup password.
Note: You can only change the setup password locally; you cannot do it
remotely. Also, passwords are case sensitive. The next time you enter
the password, it must be in the same case as you set it up.
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5 Remote Configuration
Changing the Remote Escape Character
To increase security, you can change a remote modem’s remote configuration escape character. The remote configuration escape character is
stored in register S9. The factory default is 37, which is the ASCII code
for the percent character (%). Setting S9 to 0 (zero) disables remote
configuration entirely—but if you do this remotely, you won’t be able to
change it back remotely!
1. Establish a remote configuration link with the remote modem as
described in “Basic Procedure.”
2. Type ATS9=n, where n is the ASCII code for the new remote configuration escape character, then press ENTER.
3. Save the new value by typing AT&W and pressing ENTER.
4. Type ATO<CR> to exit remote configuration.
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6
Callback
Security
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6 Callback Security
Introduction
This chapter describes how to use callback security with your modem.
Callback security protects your network from unauthorized access and
helps control long distance costs. When callback security is enabled, all
callers are requested to enter a password. If a valid password is received, the modem hangs up and returns the call by dialing a phone
number that is stored with the password. The person being called back
must then enter the password a second time to establish a connection.
Up to 30 callback passwords and dialing strings can be stored in the
modem. Each dialing string can be up to 34 or 35 characters long and
can contain commands as well as phone numbers. For mobile callers,
the dialing string can be programmed to allow the caller to bypass the
stored callback number by entering a temporary callback number, to
enter an extension at the callback number, or to make a direct connection without callback.
For local security, the passwords and dialing strings that are stored in
the modem are protected from tampering by a setup password, which
you should change when you set up the modem. You can further protect the modem against tampering by disabling its ability to respond to
most AT commands. To check for attempted breakins, you can request
the modem to display the number of failed password attempts.
Setup Procedures
Your modem was shipped with a default setup password (MTSMODEM). The same password is used for both callback security and remote configuration (Chapter 5). Because anyone who has access to
this manual has access to the default password, you should change the
password during your initial setup.
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To Change the Setup Password
1. Open a data communications program such as HyperTerminal.
2. In the terminal window, type AT#SMTSMODEM (or AT#S
if you have replaced the MTSMODEM password with
press ENTER. The modem responds with OK if the setup password
is correct, and ERROR if it is wrong.
3. To change the password, type AT#S=
stands for the password, and press ENTER. The password can include any keyboard character, and can be up to eight characters
long. The modem responds with OK.
4. The new password is saved automatically. You can now either enter
more AT commands or exit the data communications program. The
next time you wish to set up the modem you must use the new
password.
Note: Passwords are case sensitive. The next time you enter the
password, it must be in the same case as you set it up.
xxxxxxxx
, where
xxxxxxxx
xxxxxxxx
xxxxxxxx
) and
To Turn Callback Security On and Off
Callback security must be turned on to enter many callback security
commands.
1. Open a data communications program such as HyperTerminal.
2. In the terminal window, type AT#S
your password, and press ENTER. The modem responds with OK if
the setup password is correct, and ERROR if it is wrong.
3. Type one of the following commands:
xxxxxxxx
, where
xxxxxxxx
is
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6 Callback Security
• To turn off callback security, type AT#CBS0 and press ENTER.
Callers no longer need a password to connect to the modem, the
modem is unable to call them back, and the stored dialing command locations 0–3 become available.
• To turn on both local and remote callback security, type
AT#CBS1 and press ENTER. With local security turned on, you
must enter the setup password before you can enter any AT
command except the AT,
For a description of remote callback security, see the following
paragraph.
• To turn on remote callback security only, type AT#CBS2 and
press ENTER. With remote callback security turned on, each
caller is asked to enter a password, is called back, and then is
asked to enter the password again before a connection can be
made. Also, dialing command locations 0–3, for use with the
DS=y
dialing command, are replaced by callback dialing com-
mand locations 0–29.
• To temporarily disable callback security if the modem is set to
#CBS1 or #CBS2 (for instance, to call another modem), type
AT#CBS3 and press ENTER. The modem returns to its original
setting when you issue the hangup command (+++ATH) or the
modem is reset. Note that if a remote modem breaks the connection, callback security remains disabled.
ATIn
, and
AT#Sxxxxxxxx
commands.
To Set the Parity of the Callback Security Messages
The parity of the modem’s password prompt and messages must match
the parity of the computer the modem is connected to.
1. Open a data communications program such as HyperTerminal.
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2. In the terminal window, type AT#S
your password, and press ENTER. The modem responds with OK if
the setup password is correct, and ERROR if it is wrong.
3. The default parity value for your modem is no parity (AT#CBP0). To
change the modem’s prompt messages to use even parity,
typeAT#CBP2 and press ENTER. For odd parity, type AT#CBP1
and press ENTER.
4. To store the new parity value, type AT&W and press ENTER.
xxxxxxxx
, where
xxxxxxxx
is
To Assign Callback Passwords and Phone Numbers
1. Open a data communications program such as HyperTerminal.
2. In the terminal window, type AT#S
your password, and press ENTER. The modem responds with OK if
the setup password is correct, and ERROR if it is wrong.
3. Enable callback security by typing AT#CBS1 or AT#CBS2 and
pressing ENTER.
4. To store a callback password for the first callback memory location,
type AT#CBN0
press ENTER. The password must be unique, must be six to eight
characters, in length, and must not contain a + or - character.
5. To store a callback password for the second callback memory location, type AT#CBN1
word, and press ENTER. Note that the memory location number in
the command is incremented by one.
6. Repeat as many times as necessary, up to memory location 29,
until all passwords have been entered.
7. To store a callback phone number in the first memory location, type
AT&Z0=[+][-]AT
xxxxxxxx
xxxxxxxx
xxxxxxxx[,
, where
xxxxxxxx
xxxxxxxx
, where
???], where
, where
xxxxxxxx
is the first password, and
xxxxxxxx
is the second pass-
xxxxxxxx
is the dialing
is
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6 Callback Security
string, and press ENTER. The phone number must be preceded by
DT, for tone dialing, or DP, for pulse dialing. The dialing string can
also include other AT commands. Example: AT&Z0=+-
ATM0DT5551212. Up to 35 characters can be used. The +, -, and
??? characters are optional:
+ Number entry. Add if you want a mobile caller to be able to
enter his current phone number for callback.
- Direct connection. Add if you want a caller to be able to
choose to connect directly without being called back.
,??? Extension entry. Must be used with the + command. Add if
you want a caller to be able to enter an extension number for
callback. The number of ? characters should equal the number of digits in the extension.
8. To store a callback phone number in the second memory location,
type AT&Z1=[+][-]AT
string, and press ENTER. Note that the memory location number in
the command is incremented by one.
9. Repeat as many times as necessary, through memory location 29,
until all dialing strings have been entered.
10. To review your entries, type AT&V and press ENTER.
xxxxxxxx[,
???], where
xxxxxxxx
is the dialing
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Calling Procedures
Use the following procedures to call a modem that has callback security
enabled.
Note: Autoanswer must be enabled on the calling modem (
S0=1
).
Password-Only Callback
Use this procedure when calling from a fixed location.
1. Using a data communications program such as HyperTerminal, dial
the number of the callback modem.
2. When the connection is established, the callback modem responds
with the following message:
Password>
3. Type the password corresponding to the phone number for your
modem and press ENTER You have three attempts or one minute
to enter a valid password.
4. If the password is valid, the following message appears and the
modems disconnect:
OK Disconnecting
5. After the delay specified by the
dem calls the number associated with the password. If the callback
modem is unable to establish a connection, it tries again, up to the
number of attempts specified by the
6. After the modems reconnect, the following message reappears:
Password>
#CBDn
command, the callback mo-
#CBAn
command.
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