Model MT5634ZBA
Model MT5634ZBAV
Data/Fax Modem
Data/Fax/Voice Modem
User Guide
Model MT5634ZBA
Model MT5634ZBAV
Data/Fax Modem
Data/Fax/Voice Modem
User Guide
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 obli-
gation of Multi-Tech Systems, Inc. to notify any person or organization of such revi-
sions or changes.
Record of Revisions
Revision Date
3/2/98
Description
Manual released.
A
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 Technolo-
gies 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.
2205 Woodale Drive
Mounds View, MN 55112 U.S.A
Fax (612) 785-9874
Fax-Back Service (612) 717-5888
Technical Support (800) 972-2439
BBS (612) 785-3702 or (800) 392-2432
(612) 785-3500 or (800) 328-9717
iv
Contents
Chapter 1: Introduction
Chapter 2: Quick Start
You supply............................................................................................ 9
Safety Warnings ...................................................................................... 10
Line Connection ................................................................................. 16
Power-On Test ................................................................................... 17
v
User Guide
References .............................................................................................. 30
Chapter 3: Features
Computer............................................................................................ 36
Telephone Line .................................................................................. 37
Chapter 4: AT Commands, S-Registers & Result Codes
Chapter 5: Remote Configuration
Setup........................................................................................................ 80
vi
Contents
Chapter 6: Callback Security
Direct Connection ............................................................................... 93
Chapter 7: Solving Problems
Introduction ............................................................................................103
Appendix A: Regulatory Compliance
vii
User Guide
Appendix C: Loopback Tests
Introduction ............................................................................................131
Appendix D: Warranty, Service, and Technical Support
Limited Warranty ...................................................................................137
About CompuServe ............................................................................... 142
Appendix E: Upgrade Procedures
Introduction ............................................................................................143
viii
Contents
FLASHWIN ....................................................................................... 149
Index........................................................................................ 151
ix
User Guide
x
1
Introduction
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: Multi-
Tech Systems, Inc. This owner’s manual will help you install, configure,
test and use your modem.
Product Description
The MT5634ZBA and MT5634ZBAV modems incorporate K56flex™
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 transmis-
sions, and transmissions between client modems, are limited to data
rates of 33.6K bps, as are downstream transmissions that are convert-
ed 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 char-
acters each in the modems’ nonvolatile memory. In callback security
mode, you can store up to 30 passwords and dialing strings. The mo-
dems pulse- or tone-dial, and recognize dial tones and busy signals for
reliable call-progress detection. The modems can detect AT&T calling
*Though these modems are capable of 56K bps download performance, line im-
pairments, public telephone infrastructure, and other external technological fac-
tors currently prevent maximum 56K bps connections.
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User Guide
card tones. They also have DTR dialing, Caller ID, remote configura-
tion, 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 with-
out 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 pro-
vides 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 Multi-
Tech via telephone, fax, bulletin board service, CompuServe, and the Internet).
4
User Guide
6
2
Quick Start
2 Quick Start
Introduction
We know you are eager to get your Multi-Tech fax modem up and run-
ning, 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
An MT5634ZBA or MT5634ZBAV data/fax modem
A DC power supply module
One set of four plastic feet
Two sets of hook-and-loop fasteners
One modular telephone cable
Trio communications software
A Quick Start Guide
This User Guide on disk
An installation disk
You supply
A computer with an unused serial port
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
A nearby AC power outlet
A nearby telephone line jack
An optional PC stereo microphone (MT5634ZBAV only)
An optional headset, amplified speaker, or sound card with
speakers (MT5634ZBAV only)
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User Guide
For connecting to the sound card, an optional male-to-male ste-
reo patch cord with 1/8-inch mini plugs (MT5634ZBAV only)
If you are new to computers, see Chapter 3, “Features,” for more infor-
mation 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.
•
10
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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User Guide
Step 2: Change the Internal Jumpers
Skip this step unless
•
you have an MT5634ZBAV and intend to add a monophonic exter-
nal 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.
12
2 Quick Start
J10 Dial-Up/Leased Line
J11 Originate/Answer
Leased line
Answer (default)
Originate
Dial-up (default)
J11
J10
J8
J8 Speaker Mode
Closed: stereo (default)
Open: mono
Figure 2-2. Internal jumpers (MT5634ZBAV).
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User Guide
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 dial-
up 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.
14
2 Quick Start
Step 3: Connect the Modem to Your System
Placing the modem in a convenient location, connect it to your com-
puter’s serial port, to the telephone line, to AC power, and, optionally,
to your telephone (UK and international models do not have a tele-
phone 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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User Guide
RS232 Connection
Plug one end of the serial cable into the RS232 connector on the mo-
dem, 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 mo-
dem’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 mi-
crophone 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 mi-
crophone.
16
2 Quick Start
Speaker Connection (MT5634ZBAV only)
For speakerphone or voicemail applications, use a 1/8-inch-plug male-
to-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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User Guide
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 com-
puter, 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.
18
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 in-
stallation 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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User Guide
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 soft-
ware 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 Hy-
perTerminal 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 config-
uration 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 &D0 com-
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 sec-
ond 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).
20
2 Quick Start
Note: To change the modem’s default configuration, type new com-
mands in the software’s terminal window, adding the &W command
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 compres-
sion, you should set your serial port baud rate to four times the mo-
dem’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 EN-
TER. Select COM Ports to see the UART type. If you have Win-
dows 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.
21
User Guide
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 (NO
CARRIER, BUSY, NO ANSWER, NO DIALTONE), make sure there
is no space between DIAL and TONE in NO DIALTONE.
9. Refer to the software manual or online Help for other configuration
choices; in most cases you can accept the default values.
22
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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User Guide
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: Type 1-800-392-2432 if you are in North America,
or type an overseas access code and 612-785-3702 if you are out-
side North America.
Communications: Select the COM port the modem is connected to
and change the following: Baud rate to 19200; Flow control to
Hardware; and Carrier Detect to checked.
24
2 Quick Start
Modem Commands: Select MultiTech. If you must dial 9 to get an
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 hand-
shake.
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.
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User Guide
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 Multi-
Tech 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 soft-
ware included with the modem.
Microsoft Fax is installed in Windows 95 as part of the Microsoft Ex-
change option. You can use Microsoft Fax either as a stand-alone fax
program or to fax from within another application. In the following pro-
cedure you will test your fax modem by running Microsoft Fax as a stand-
alone 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 # box-
es.
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.
26
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.
27
User Guide
Step 8: Test the MT5634ZBAV Voice Circuits
There are several tests that you can perform to verify the voice circuits
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 separat-
ed; 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.
28
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
ATDTxxxxxxx (for xxxxxxx substitute a telephone number)
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.
29
User Guide
References
The World Wide Web is an excellent source of information about mo-
dems in general and modem installation, configuration, and trouble-
shooting in particular. The following Web sites are good places to start:
•
•
•
•
Costmo’s Other Resources Page:
Curt’s High Speed Modem Page:
Data Communications FAQ:
Multi-Tech Systems, Inc.:
30
3
Features
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 com-
puter network of universities, libraries, businesses, and government
agencies. Like the commercial online services, the Internet provides e-
mail 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 communi-
cations.
If you have the MT5634ZBAV model, you can also use your modem
with voice mail and speakerphone applications.
33
User Guide
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 condi-
tions, 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 already-
compressed files.
•
•
Autodial, redial, pulse (rotary) and touch-tone dial.
Dial tone and busy signal detection for reliable call-progress reporting.
34
3 Features
•
•
Compatible with the standard AT command set used by most com-
munication 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 in-
clude voice mail control, record/playback, and call screening.
Supports the TIA/EIA IS-101 AT+V voice command set.
35
User Guide
Required Equipment
In addition to the contents of your modem package, you need the fol-
lowing 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.
36
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 accesso-
ries 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 (data-
comm) and fax communications software (included with the modem).
Data communications software simplifies control of the modem by guid-
ing 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.
37
User Guide
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 Ameri-
can 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 op-
tionally be connected to a microphone and an external speaker.
OFF
ON
SPKR MIC
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 comput-
er. 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.
38
3 Features
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 Can-
ada, the British Approvals Board for Telecommunications (BABT), and
other regulatory agencies impose certain restrictions on equipment con-
nected 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 appli-
cations, plug a microphone into the MIC jack of the modem. The micro-
39
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 appli-
cations, 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 con-
nect 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 approxi-
mately two seconds, after which the 56 indicator should light. If this
40
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 light-
ning strikes, can damage or destroy your modem. Therefore, we recom-
mend that you plug the modem into a surge protector rather than
directly into a wall outlet, preferably a surge protector that provides pro-
tection 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 pow-
er outlet and the telephone line.
41
User Guide
Front Panel
Figure 3-3. Front panel
The MT5634ZBA has ten LED indicators on the front panel that indicate
status, configuration, and activity:
TD Transmit Data. The TD LED flashes when the modem is transmit-
ting data to another modem. The state of the LED matches the TD
circuit on pin 2 of the RS-232C/V.24 interface.
RD Receive Data. The RD LED flashes when the modem is receiving
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.
CD Carrier Detect. The CD LED lights when the modem detects a
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
modem connects to an ISP server in K56flex or V.PCM mode. The
actual connection speed depends on server capabilities and line
conditions.
56
33 V.34 Mode (33,600–16,800 bps). The 33 LED lights whenever the
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.
42
3 Features
Note: Although the modem can connect at lower than V.32bis
speeds, no speed indicator lights during the connection.
OH Off-Hook. The OH LED lights when the modem is off-hook, which
occurs when the modem is dialing, online, or answering a call. The
LED flashes when the modem pulse-dials.
TR Terminal Ready. The TR LED lights when a datacomm program
initializes the modem. It means the modem is ready for an outgo-
ing 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.
EC Error Correction (V.42). The EC LED lights continuously when
the modem is in V.42 error correction mode, and blinks when com-
pression is activated.
FX Fax. The FX LED lights when the modem is in fax mode.
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.
43
User Guide
44
4
AT Commands,
S-Registers &
Result Codes
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 charac-
ters 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 command mode
whenever it is not connected to another modem. The modem is in data
mode whenever it is connected to another modem and ready to ex-
change data. Online command mode is a temporary state in which you
can issue commands to the modem while connected to another mo-
dem. To put the modem into online command mode from data mode,
you must issue an escape sequence (+++) followed immediately by the
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 con-
figuring 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 re-
configuring the modem, e.g., to turn autoanswer on or off.
The format for entering an AT command is ATXn, where X is the com-
mand and n is the specific value for the command, sometimes called
the command parameter. The value is always a number. If the value is
zero, you can omit it from the command; thus, AT&W is equivalent to
AT&W0. Most commands have a default value, which is the value that
is set at the factory. The default values are shown in the “AT Command
Summary,” which begins on the next page.
47
User Guide
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 result
code. The most common result codes are OK, ERROR, and the CON-
NECT messages that the modem sends to the computer when it is con-
necting 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 com-
mand string. The command string begins with AT and ends when you
press ENTER. Spaces to separate the commands are optional; they are
ignored by the command interpreter. The most familiar command string
is the initialization string, which is used to configure the modem when it
is turned on or reset, or when your communications software calls an-
other modem.
AT Command Summary
Command:
Values:
AT
Attention Code
n/a
Description:
The attention code precedes all command lines
except A/, A:, and escape sequences.
Command:
Values:
ENTER Key
n/a
Description:
Press the ENTER (RETURN) key to execute most
commands.
Command:
Values:
A
Answer
n/a
Description:
Answer call before final ring.
48
4 AT Commands, S-Registers, and Result Codes
Command:
Values:
A/
Repeat Last Command
n/a
Description:
Repeat the last command string. Do not precede
this command with AT. Do not press ENTER to
execute.
Command:
Values:
Bn
Communication Standard Setting
n = 0–3, 15, 16
Default:
1 and 16
Description: B0
Select ITU-T V.22 mode when modem is at 1200
bps.
B1
B2
B3
B15
B16
Select Bell 212A when modem is at 1200 bps.
Deselect V.23 reverse channel (same as B3).
Deselect V.23 reverse channel (same as B2).
Select V.21 when the modem is at 300 bps.
Select Bell 103J when the modem is at 300 bps.
Command:
Values:
Cn
Carrier Control
n = 1
Default:
1
Description: C0
C1
Transmit carrier always off. (Not supported.)
Normal transmit carrier switching (included for
backward compatibility with some software).
Command:
Values:
Default:
Ds
Dial
s = dial string (phone number and dial modifiers)
none
Description:
Dial telephone number s, where s may up to 40
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.
49
User Guide
Dial string modifiers:
L
Redial last number. (Must be placed immedi-
ately after ATD.)
P
T
Pulse-dial following numbers in command.
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:
Values:
DS=y Dial Stored Telephone Number
n = 0–3
Default:
none
Description:
Dial a number previously stored in directory num-
ber y by the &Zy=x command.
Example: ATDS=3
50
4 AT Commands, S-Registers, and Result Codes
Command:
Values:
En
Echo Command Mode Characters
n = 0 or 1
Default:
1
Description: E0
E1
Do not echo keyboard input to the terminal.
Do echo keyboard input to the terminal.
Command:
Values:
Fn
Echo Online Data Characters
n = 1
Default:
1
Description: F0
Enable online data character echo. (Not sup-
ported.)
F1
Disable online data character echo (included for
backward compatibility with some software).
Command:
Values:
Hn
Hook Control
n = 0 or 1
Default:
0
Description: H0
H1
Go on-hook (hang up).
Go off-hook (make the phone line busy).
Command:
Values:
In
Information Request
n = 0–5, 9, 11
Default:
None
Description: I0
Display default speed and controller firmware
version.
I1
I2
I3
Calculate and display ROM checksum (e.g.,
12AB).
Check ROM and verify the checksum, displaying
OK or ERROR.
Display default speed and controller firmware
version.
I4
I5
Display firmware version for data pump (e.g., 94).
Display the board ID: software version, hardware
version, and country ID
51
User Guide
I9
I11
Display the country code (e.g., NA Ver. 1).
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:
Values:
Ln
Monitor Speaker Volume
n = 0, 1, 2, or 3
Default:
2
Description: L0
Select low volume.
Select low volume.
Select medium volume.
Select high volume.
L1
L2
L3
Command:
Values:
Mn
Monitor Speaker Mode
n = 0, 1, 2, or 3
Default:
1
Description: M0
Speaker always off.
M1
M2
M3
Speaker on until carrier signal detected.
Speaker always on when modem is off-hook.
Speaker on until carrier is detected, except while
dialing.
Command:
Values:
Nn
Modulation Handshake
n = 0 or 1
Default:
1
Description: N0
N1
Modem performs handshake only at communica-
tion standard specified by S37 and the B com-
mand.
Modem begins handshake at communication
standard specified by S37 and the B command.
During handshake, fallback to a lower speed can
occur.
52
4 AT Commands, S-Registers, and Result Codes
Command:
Values:
On
Return Online to Data Mode
0, 1, 3
Default:
None
Description: O0
Exit online command mode and return to data
mode (see +++AT<CR> escape sequence ).
Issue a retrain and return to online data mode.
Issue a rate renegotiation and return to data
mode.
O1
O3
Command:
Values:
P
Pulse Dialing
P, T
Default:
T
Description:
Configures the modem for pulse (non-touch-tone)
dialing. Dialed digits are pulsed until a T com-
mand or dial modifier is received.
Command:
Values:
Qn
Result Codes Enable/Disable
n = 0 or 1
Default:
0
Description: Q0
Enable result codes.
Q1
Q2
Disable result codes.
Returns an OK for backward compatibility with
some software.
Command:
Values:
Default:
Sr=n Set Register Value
r = S-register number; n varies
None
Description:
Set value of register Sr to value of n, where n is
entered in decimal format. E.g., S0=1.
53
User Guide
Command:
Values:
Sr?
Read Register Value
r = S-register number
Default:
None
Description:
Read value of register Sr and display it in 3-digit
decimal form. E.g., S2? gives the response 043.
Command:
Values:
T
Tone Dialing
P, T
Default:
T
Description:
Configures the modem for DTMF (touch-tone)
dialing. Dialed digits are tone dialed until a P
command or dial modifier is received.
Command:
Values:
Vn
Result Code Format
n = 0 or 1
Default:
1
Description: V0
V1
Displays result codes as digits (terse response).
Displays result codes as words (verbose response).
Command:
Values:
Wn
Result Code Options
n = 0, 1, or 2
Default:
2
Description: W0
CONNECT result code reports serial port speed,
disables protocol result codes.
CONNECT result code reports serial port speed,
enables protocol result codes.
CONNECT result code reports line speed, en-
ables protocol result codes.
W1
W2
Command:
Values:
Xn
Result Code Selection
n = 0–7
Default:
4
Description: X0
Basic result codes (e.g., CONNECT); does not
look for dial tone or busy signal.
54
4 AT Commands, S-Registers, and Result Codes
X1
Extended result codes (e.g., CONNECT 46000
V42bis); does not look for dial tone or busy sig-
nal.
X2
X3
X4
X5
X6
X7
Extended result codes with NO DIALTONE; does
not look for busy signal.
Extended result codes with BUSY; does not look
for dial tone.
Extended result codes with NO DIALTONE and
BUSY.
Extended result codes with NO DIALTONE and
BUSY.
Extended result codes with NO DIALTONE and
BUSY.
Basic result codes with NO DIALTONE and
BUSY.
Command:
Values:
Yn
Long Space Disconnect
n = 0
Default:
0
Description: Y0
Y1
Disable sending or responding to long space
break signal on disconnect.
Enable sending or responding to long space
break signal on disconnect. (Not supported.)
Command:
Values:
Zn
Modem Reset
n = 0 or 1
Default:
None
Description: Z0
Reset modem to profile saved by the last &W
command.
Z1
Same as Z0.
55
User Guide
Command:
Values:
Default:
&Bn V.32 Auto Retrain
n = 1
1
Description: &B0 Disable V.32 auto retrain. (Not supported.)
&B1 Enable V.32 auto retrain.
Command:
Values:
Default:
&Cn Data Carrier Detect (DCD) Control
n = 0 or 1
1
Description: &C0 Forces the DCD circuit to be always high.
&C1 DCD goes high when the remote modem’s carrier
signal is detected, and goes low when the carrier
signal is not detected.
Command:
Values:
Default:
&Dn Data Terminal Ready (DTR) Control
n = 0, 1, 2, or 3
2
Description: &D0 Modem ignores the true status of the DTR signal
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
4 AT Commands, S-Registers, and Result Codes
Command:
&Fn Load Factory Settings
Values:
Default:
n = 0
None
Description: &F0
Load factory settings as active configuration.
Note: See also the Z command.
Command:
Values:
Default:
&Gn V.22bis Guard Tone Control
n = 0, 1, or 2
0
Description: &G0 Disable guard tone.
&G1 Set guard tone to 550 Hz.
&G2 Set guard tone to 1800 Hz.
Note: The &G command is not used in North America.
Command:
Values:
Default:
&Jn Auxiliary Relay Control
n = 0
0
Description: &J0
&J1
The auxiliary relay is never closed.
Not supported—responds ERROR.
Command:
Values:
Defaults:
&Kn Flow Control Selection
n = 0, 3, or 4
3
Description: &K0 Disable flow control.
&K3 Enable CTS/RTS hardware flow control.
&K4 Enable XON/XOFF software flow control.
Command:
Values:
Defaults:
&Mn Communications Mode
n = 0
0
Description: &M0 Asynchronous mode.
&M1 Not supported—responds ERROR.
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User Guide
Command:
Values:
Default:
&Qn Asynchronous Communications Mode
n = 0, 5, 6, 8, or 9
5
Description: &Q0 Asynchronous with data buffering. Same as \N0.
&Q5 Error control with data buffering. Same as \N3.
&Q6 Asynchronous with data buffering. Same as \N0.
&Q8 MNP error control mode. If MNP error control is
not established, the modem falls back according
to the setting in S36.
&Q9 V.42 or MNP error control mode. If neither error
control is established, the modem falls back ac-
cording to the setting in S36.
Command:
Values:
Default:
&Sn Data Set Ready (DSR) Control
n = 0 or 1
0
Description: &S0 Force DSR always high (on).
&S1 Let DSR go high only during a connection.
Command:
Values:
Default:
Description: &T0
&T1
&Tn V.54 Test Commands
n = 0, 1, 3 or 6
None
Abort. Stop any test in progress.
Local analog loopback test.
Local digital loopback test.
Remote digital loopback test.
&T3
&T6
Note: To stop a test, you must use the escape sequence (+++AT)
before typing AT&T0.
58
4 AT Commands, S-Registers, and Result Codes
Command:
Values:
&V
Display Current Settings
n/a
Description:
Displays the active modem settings, including the
callback security settings if callback security is
enabled. If the setup password has been entered, it
also displays the callback security passwords.
Command:
Values:
Default:
&Wn Store Current Configuration
n = 0
None
Description: &W0 Stores current modem settings in nonvolatile
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.
Command:
Values:
Default:
&Yn Select Stored Configuration for Hard Reset
n = 0
0
Description: &Y0 Select stored configuration 0 on power-up. (For
backward compatibility with some software.)
&Y1 Not supported—responds ERROR.
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User Guide
Command: &Zy=x Store Dialing Command
Values:
y = 0–3 (callback security disabled) or 0–29
(callback security enabled)
x = Dialing command
Default:
None
Description:
Stores dialing command x in memory location y.
Dial the stored number using the command
ATDS=y. See also the #CBSn command. For
callback security options, see Chapter 6.
Command:
Values:
&&S Speaker Codec Loopback
n/a
Description:
Provides a loopback from the microphone to the
speaker. For testing and debugging only.
Command:
Values:
\An
Select Maximum MNP Block Size
n = 0, 1, 2, or 3
Default:
3
Description: \A0
64-character maximum.
128-character maximum.
192-character maximum.
256-character maximum.
\A1
\A2
\A3
Command:
Values:
\Bn
Transmit Break
n = 0–9 in 100 ms units
Default:
3
Description:
In non-error-correction mode only, sends a break
signal of the specified length to a remote modem.
Works in conjunction with the \K command.
60
4 AT Commands, S-Registers, and Result Codes
Command:
Values:
\Gn
Modem Port Flow Control
n = 0
Default:
0
Description: \G0
\G1
Returns an OK for backward compatibility with
some software.
Not supported—responds ERROR.
Command:
Values:
\Jn
Data Buffer Control
n = 0
Default:
0
Description: \J0
\J1
Enable data buffer—serial port speed is indepen-
dent of connect speed.
Disable data buffer—serial port speed is forced
to the line speed.
Command:
Values:
\Kn
Break Control
n = 0–5
Default:
5
Description:
Controls the response of the modem to a break
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
\K1
Enter online command mode, no break sent to
the remote modem.
Clear data buffers and send break to the remote
modem.
\K2
\K3
\K4
\K5
Same as \K0.
Send break immediately to the remote modem .
Same as \K0.
Send break to the remote modem in sequence
with the transmitted data.
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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
\K2
\K3
\K4
Same as \K0.
Send break immediately to the computer.
Same as \K2.
Send break to the computer in sequence with the
received data.
\K5
Same as \K4.
Online command mode. The modem receives a
\Bn command from the computer:
Clear data buffers and send break to the remote
modem.
\K0
\K1
\K2
\K3
\K4
Same as \K0.
Send break immediately to the remote modem.
Same as \K2.
Send break to the remote modem in sequence
with the transmitted data.
\K5
Same as \K4.
Command:
Values:
\Nn
Error Correction Mode Selection
n = 0–5, or 7
Default:
3
Description: \N0
Non-error correction mode with data buffering
(buffer mode; same as &Q6).
\N1
\N2
Direct mode.
MNP reliable mode. If the modem cannot make
an MNP connection, it disconnects.
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.
\N3
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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
\N7
V.42, MNP, or non-error correction (same as \N3).
V.42, MNP, or non-error correction (same as \N3).
Command:
Values:
\Qn
Flow Control Selection
n = 0, 1, or 3
Default:
3
Description: \Q0
Disable flow control (same as &K0).
XON/XOFF software flow control (same as &K4).
CTS-only flow control. Not supported.
RTS/CTS hardware flow control (same as &K3).
\Q1
\Q2
\Q3
Command:
Values:
\Tn
Inactivity Timer
n = 0, 1–255
Default:
0
Description: \Tn
Sets the time (in minutes) after the last character
is sent or received that the modem waits before
disconnecting. A value of zero disables the timer.
Applies only in buffer mode.
Note: You can also set the inactivity timer by changing the value of S30.
Command:
Values:
\Vn
Protocol Result Code
n = 0, 1, or 2
Default:
1
Description: \V0
Disable the appending of the protocol result code
to the DCE speed.
\V1
\V2
Enable the appending of the protocol result code
to the DCE speed.
Same as \V1.
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User Guide
Command:
Values:
\Xn
XON/XOFF Pass-Through
n = 0 or 1
Defaults:
0
Description: \X0
Modem responds to and discards XON/XOFF
characters.
\X1
Modem responds to and passes XON/XOFF
characters.
Command:
Values:
-Cn
Data Calling Tone
n = 0 or 1
Defaults:
0
Description: -C0
Disable V.25 data calling tone to deny remote
data/fax/voice discrimination.
Enable V.25 data calling tone to allow remote
data/fax/voice discrimination.
-C1
Command:
Values:
%B
View Numbers in Blacklist
n/a
Description:
If blacklisting is in effect, AT%B displays the
numbers for which the last call attempted in the
previous two hours failed. In countries that do not
require blacklisting, the ERROR result code ap-
pears.
Command:
Values:
Default:
%Cn Data Compression Control
n = 0 or 1
1
Description: %C0 Disable V.42bis/MNP 5 data compression.
%C1 Enable V.42bis/MNP 5 data compression.
64
4 AT Commands, S-Registers, and Result Codes
Command: %DCn AT Command Control
Values:
Default:
n = 0 or 1
0
Description: %DC0 The modem responds to AT commands.
%DC1 The modem ignores AT commands.
Note: The modem will respond to AT%DC for 10 seconds after power-up.
Command:
Values:
Default:
%En Fallback and Fall Forward Control
n = 0, 1, or 2
2
Description: %E0 Disable fallback and fall forward.
%E1 Enable fallback, disable fall forward.
%E2 Enable fallback and fall forward.
Command:
Values:
Default:
$Dn DTR Dialing
n = 0 or 1
0
Description: $D0
$D1
Disables DTR dialing.
Dials the number in memory location 0 when
DTR goes high.
Command:
Values:
Default:
$EBn Asynchronous Word Length
n = 0 or 1
0
Description: $EB0 Enables 10-bit mode.
$EB1 Enables 11-bit mode.
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User Guide
Command: +ES=n Enable Synchronous Buffered Mode
Values:
n = 6
Default:
None
Description:
Allows an H.324 video application direct access
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, or \N.
AT+ES=? shows the only allowed value.
AT+ES? shows the current value.
Command: #CBAn Callback Attempts
Values:
n = 1–255
Default:
4
Description:
Sets the number of callback attempts that are
allowed after passwords have been exchanged
between modems.·
Command: #CBDn Callback Delay
Values:
n = 0–255
Default:
15
Description:
Sets the length of time (in seconds) that the mo-
dem waits before calling back the remote modem.
Command: #CBF? Callback Failed Attempts Display
Values:
n/a
Default:
n/a
Description:
Requests the number of failed callback pass-
words since reset or power-up. This number can
be stored to nonvolatile memory using the &W
command.
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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
to 0. This does not reset the number stored in
nonvolatile memory.
Command: #CBIn Local Callback Inactivity Timer
Values:
n = 1–255
Default:
20
Description:
Sets the time (in minutes) that the modem waits
for a command before forcing the user to enter
the setup password again.
Command: #CBNy=x Store Callback Password
Values:
y = 0–29
x = password
Defaults:
None
Description:
Sets the callback security password for the y
memory location. The password must have 6 to
10 characters, and cannot include the + or -
characters.
Command: #CBPn Callback Parity
Values:
n = 0, 1, or 2
Default:
0
Description:
Sets parity for the callback security messages.
#CBP0 No parity.
#CBP1 Odd parity.
#CBP2 Even parity.
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User Guide
Command: #CBRy Callback Security Reset
Values:
y = 0–29
Default:
None
Description:
Clears the password and phone number in the y
memory location.
Command: #CBSn Callback Enable/Disable
Values:
Default:
n = 0, 1, 2, or 3
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
reset.
Command: #Pn
Set 11-bit Parity
n = 0 or 1
2
No parity.
Odd parity.
Even parity.
Values:
Default:
Description: #P0
#P1
#P2
Command: #Sx
Values:
Default:
Enter Setup Password
x= password (1–8 characters, case sensitive)
MTSMODEM
Description:
Enters the remote configuration setup password.
Command: #S=x Store Setup Password
Values:
x= password (1–8 characters, case sensitive)
Default:
MTSMODEM
Description:
Stores a new remote configuration setup password.
68
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-
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>.
Command: %%%AT<CR> Remote Configuration Escape Sequence
Values:
n/a
Description:
Initiates remote configuration mode while online
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
S0
Unit
Range Default Description
0, 1–255 1 Sets the number of rings until
1 ring
the modem answers.
ATS0=0 disables autoanswer
completely.
S1
S2
1 ring
0–255
0
Counts the rings that have
occurred.
decimal 0–127
128–255
43 (+)
Sets ASCII code for the
escape sequence character.
Values greater than 127
disable escape.
S3
S4
S5
decimal 0–127
decimal 0–127
13 (^M) Sets the ASCII code for the
carriage return character.
10 (^J) Sets the ASCII code for the
line feed character.
decimal 0–32
33–127
8 (^H)
2*
Sets the ASCII code for the
backspace character. Values
greater than 32 disable
backspace.
S6
seconds 2–65*
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.
70
4 AT Commands, S-Registers, and Result Codes
Register
S7
Unit
Range Default Description
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.
S8
seconds 0–65
2
Sets the length of a pause
caused by a comma
character in a dialing
command.
S9
decimal 0, 1–127 37 (%) Sets ASCII code for remote
configuration escape
character. S9=0 disables
remote configuration.
S10
100 ms 1–254
20
Sets how long a carrier signal
must be lost before the
modem disconnects.
S11
S28
S30
1 ms
50–150* 95*
Sets spacing and duration of
dialing tones.
decimal 0, 1–255 1
1 minute 0, 1–255 0
0 disables, 1–255 enables
V.34 modulation.
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
S35
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
S36
Unit
Range Default Description
decimal 0–7
7
Specifies the action to take in
the event of a negotiation
failure when error control is
selected. (See S48.)
S37
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
72
4 AT Commands, S-Registers, and Result Codes
Register
S38
Unit
Range Default Description
decimal 0–14
1
Sets the maximum 56K
“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
S42
S43
decimal 0–1
decimal 0–1
1
1
Enables/disables the 56K
auto rate. When 56K auto is
disabled, fallback to V.34 is
also disabled. 0 = disable;
1 = enable.
For For testing and
debugging only. Enables/
disables V.32bis start-up
auto mode operation. 0 =
disable; 1 = enable.
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User Guide
Register
S48
Unit
Range Default Description
Enables (7) or disables (128)
decimal 7 or 128 7
LAPM negotiation. The fol-
lowing table lists the S36 and
S48 configuration settings for
certain types of connections.
S48=7
LAPM or hangup
LAPM or async
LAPM, MNP, or hangup MNP or hangup
S48=128
Do not use
Async
S36=0, 2
S36=1, 3
S36=4, 6
S36=5, 7
LAPM, MNP, or aysnc
MNP or async
S89
seconds 0, 5–255 10
Sets the length of time in the
off-line command mode be-
fore the modem goes into
standby mode. A value of
zero prevents standby mode;
a value of 1–4 sets the value
to 5.
S108
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
74
4 AT Commands, S-Registers, and Result Codes
Result Codes
In command mode your modem can send responses called result codes
to your computer. Result codes are used by communications programs
and can also appear on your monitor.
Terse
0
Verbose
OK
Description
Command executed
1
2
CONNECT
RING
Modem connected to line
Ring signal detected
3
4
NO CARRIER
ERROR
Carrier signal lost or not detected
Invalid command
5
6
7
*
CONNECT 1200
NO DIALTONE
BUSY
Connected at 1200 bps
No dial tone detected
Busy signal detected
8
NO ANSWER
CONNECT 2400
CONNECT 4800
CONNECT 9600
CONNECT 14400
CONNECT 19200
CONNECT 7200
CONNECT 12000
CONNECT 16800
CONNECT 300
CONNECT 21600
CONNECT 24000
CONNECT 26400
CONNECT 28800
CONNECT 31200
CONNECT 33600
CONNECT 32000
CONNECT 34000
CONNECT 36000
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
10
11
12
13
14
24
25
26
40
55
56
57
58
59
60
70
71
72
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
75
User Guide
Terse
73
74
75
76
77
78
79
80
Verbose
Description
*
*
*
*
*
*
*
*
*
*
CONNECT 38000
CONNECT 40000
CONNECT 42000
CONNECT 44000
CONNECT 46000
CONNECT 48000
CONNECT 50000
CONNECT 52000
CONNECT 54000
CONNECT 56000
DELAYED
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
81
82
88
89
90
BLACKLISTED
BLACKLIST FULL
Dialed number is blacklisted
Blacklist is full
* EC is added to these result codes when the extended result codes configu-
ration option is enabled. EC is replaced by one of the following codes, de-
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).
76
5
Remote
Configuration
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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User Guide
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 OKif 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.
80
5 Remote Configuration
Changing the Remote Escape Character
To increase security, you can change a remote modem’s remote config-
uration 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 con-
figuration 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.
81
User Guide
82
6
Callback
Security
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 re-
ceived, 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 connec-
tion 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 pro-
tect 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 (MTSMO-
DEM). The same password is used for both callback security and re-
mote 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.
85
User Guide
To Change the Setup Password
1. Open a data communications program such as HyperTerminal.
2. In the terminal window, type AT#SMTSMODEM (or AT#Sxxxxxxxx
if you have replaced the MTSMODEM password with xxxxxxxx) and
press ENTER. The modem responds with OKif the setup password
is correct, and ERROR if it is wrong.
3. To change the password, type AT#S=xxxxxxxx, where xxxxxxxx
stands for the password, and press ENTER. The password can in-
clude 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.
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#Sxxxxxxxx, where xxxxxxxx is
your password, and press ENTER. The modem responds with OKif
the setup password is correct, and ERROR if it is wrong.
3. Type one of the following commands:
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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 com-
mand 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, ATIn, and AT#Sxxxxxxxx commands.
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 connec-
tion, callback security remains disabled.
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#Sxxxxxxxx, where xxxxxxxx is
your password, and press ENTER. The modem responds with OKif
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.
To Assign Callback Passwords and Phone Numbers
1. Open a data communications program such as HyperTerminal.
2. In the terminal window, type AT#Sxxxxxxxx, where xxxxxxxx is
your password, and press ENTER. The modem responds with OKif
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#CBN0xxxxxxxx, where xxxxxxxx is the first password, and
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 loca-
tion, type AT#CBN1xxxxxxxx, where xxxxxxxx is the second pass-
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=[+][-]ATxxxxxxxx[,???], where xxxxxxxx is the dialing
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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 num-
ber of digits in the extension.
8. To store a callback phone number in the second memory location,
type AT&Z1=[+][-]ATxxxxxxxx[,???], where xxxxxxxx is the dialing
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.
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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 #CBDn command, the callback mo-
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 #CBAn command.
6. After the modems reconnect, the following message reappears:
Password>
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6 Callback Security
7. Type the same password that you used to initiate the call. You have
three attempts to enter the password or be disconnected.
8. If the password is valid, the following message appears and the
modems establish a working connection:
OK Connecting
Number-Entry Callback
Mobile callers should use this procedure when calling from a phone
number different from that stored with the password. The password that
is used must be set up for optional number-entry callback.
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 a number-entry password, press the plus key (+), type ATDT
and the number to call back to, and press ENTER You have three
attempts or one minute to enter a valid password.
Note: When you type your phone number, be sure to include the
long distance and area codes, if needed.
4. If the password is valid, the following message appears and the
modems disconnect:
OK Disconnecting
5. After the delay specified by the #CBDn command, the callback mo-
dem calls the number that you entered after the + character. If the
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callback modem is unable to establish a connection, it tries again,
up to the number of attempts specified by the #CBAn command.
6. After the modems reconnect, the following message reappears:
Password>
7. Type the same password that you used to initiate the call. You have
three attempts to enter the password or be disconnected.
8. If the password is valid, the following message appears and the
modems establish a working connection:
OK Connecting
Extension-Entry Callback
Use this procedure when calling from an extension at the callback num-
ber. The password that you use must be set up for an optional exten-
sion-entry callback.
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 an extension-entry password, press the plus key (+), type the
extension to call back to, and press ENTER You have three at-
tempts or one minute to enter a valid password.
4. If the password is valid, the following message appears and the
modems disconnect:
OK Disconnecting
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6 Callback Security
5. After the delay specified by the #CBDn command, the callback mo-
dem calls the extension that you entered after the + character. If the
callback modem is unable to establish a connection, it tries again,
up to the number of attempts specified by the #CBAn command.
6. After the modems reconnect, the following message reappears:
Password>
7. Type the same password that you used to initiate the call. You have
three attempts to enter the password or be disconnected.
8. If the password is valid, the following message appears and the
modems establish a working connection:
OK Connecting
Direct Connection
Use this procedure when you want to connect without first being called
back. The password that you use must be set up for an optional direct
connection.
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 a direct connection password, press the - key, and press EN-
TER You have three attempts or one minute to enter a valid pass-
word.
4. If the password is valid, the following message appears and the
modems establish a working connection:
OK Connecting
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User Guide
Callback Security Commands
The following AT commands are used with callback security. Most can
be entered only after the setup password has been entered.
Command: #CBAn Callback Attempts
Values:
n = 1–255
Default:
4
Description:
Sets the number of callback attempts that are
allowed after passwords have been exchanged
between modems.·This command can be entered
after the setup password has been entered and
callback security is enabled.
Command: #CBDn Callback Delay
Values:
n = 0–255
Default:
15
Description:
Sets the length of time (in seconds) that the mo-
dem waits before calling back the remote modem.
This command can be entered after the setup
password has been entered and callback security
is enabled.
Command: #CBF? Callback Failed Attempts Display
Values:
n/a
Default:
n/a
Description:
Displays the number of failed callback passwords
since reset or power-up. This number can be
stored to nonvolatile memory using the &W com-
mand. This command can be entered after the
setup password has been entered and callback
security is enabled.
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6 Callback Security
Command: #CBFR Callback Failed Attempts Reset
Values:
Default:
n/a
n/a
Description:
Resets the number of failed callback password
attempts to 0. It does not reset the number
stored in nonvolatile memory. This command can
be entered after the setup password has been
entered and callback security is enabled.
Command: #CBIn Local Callback Inactivity Timer
Values:
n = 1–255
Default:
20
Description:
Sets the time (in minutes) that the modem waits
for a command before forcing the user to enter
the setup password again. This command can be
entered after the setup password has been en-
tered and callback security has been enabled for
local/remote operation (#CBS1)
Command: #CBNy=x Store Callback Password
Values:
y = 0–29
x = password (6–10 characters)
None
Defaults:
Description:
Sets the callback security password for the y
memory location. The password must be 6–10
characters in length and cannot include the + or -
characters. This command can be entered after
the setup password has been entered and call-
back security is enabled.
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User Guide
Command: #CBPn Callback Parity
Values:
n = 0, 1, or 2
Default:
0
Description:
Sets parity for the callback security messages.
The parity of the messages should match the
parity of the computer the modem is attached to.
This command can be entered after the setup
password has been entered and callback security
is enabled.
#CBP0 No parity.
#CBP1 Odd parity.
#CBP2 Even parity.
Command: #CBRy Callback Security Reset
Values:
y = 00–29
Default:
None
Description:
Deletes the password and phone number from
the yy memory location. This command can be
entered after the setup password has been en-
tered and callback security is enabled.
Command: #CBSn Callback Enable/Disable
Values:
n = 0, 1, 2, or 3
Default:
0
Description:
Enables or disables callback security options.
When callback security is enabled, phone num-
ber memory locations 0–4, used for quick dialing
and DTR dialing, become unavailable and are
replaced by callback security memory locations
0–29. The phone number memory locations and
their contents are restored when callback security
is disabled.
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6 Callback Security
#CBS0 Disables callback security. With this command,
the modem connects as if it did not have callback
security. This command can be entered after the
setup password has been entered.
#CBS1 Enables local and remote callback security. Local
callback security requires that the setup
password be entered to use the AT command
set. The only AT commands that are available
without the setup password are AT, ATI, and
AT#Sx. For the remote callback security
description, see the #CBS2 description. This
command can be entered after the setup
password has been entered.
#CBS2 Enables remote callback security only. When
remote callback security is enabled, the modem
waits for a call, challenges the remote modem,
calls back the remote modem, and challenges
the remote modem again. Local security is
disabled, allowing calls to be made from the
modem without entering the setup password.
This command can be entered after the setup
password has been entered.
#CBS3 Temporarily disables callback security if either
#CBS1 or #CBS2 is enabled. Callback security
remains disabled until the hangup command
(+++ATH) is executed locally or the modem is
reset. This command can be entered after the
setup password has been entered.
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User Guide
Command: #Sx
Values:
Default:
Enter Setup Password
x= password (1–8 characters, case sensitive)
MTSMODEM
Description:
Enters the password used for callback security
and remote configuration setup. This command
allows the use of all callback security commands.
Command: #S=x
Values:
Default:
Store Setup Password
x= password (1–8 characters, case sensitive)
MTSMODEM
Description:
Stores a new password for callback security and
remote configuration setup.
Command: &V
Values:
Display Current Settings
n/a
Description:
Displays the modem’s active settings, including
the telephone numbers stored in nonvolatile
memory and the security settings, if enabled. If
the setup password has been entered, the pass-
words are also displayed.
Command: &Zy=[+][-]x[,???] Store Dialing Command
Values:
y = 0–29 (callback security enabled)
x = Dialing command string
Default:
None
Description:
Stores dialing command x in memory location y.
The command string must begin with AT and can
have up to 35 characters. The telephone number
in the command must be preceded by D, DT, or
DP. Example: AT&Z0=+-ATM0D5551212,???.
During a call, if the + or - character is not entered
after the password, the modem will call back the
stored number. This command can be entered
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6 Callback Security
only after the setup password has been entered
and callback security is enabled.
Options:
+
Enables the caller to enter a new callback num-
ber during password entry. The + character must
be the first or second character in the command
string.
-
Enables the caller to choose a direct connection
(no callback) during password entry. The -
character must be the first or second character in
the command string.
,???
Enables the caller to enter an extension number
during password entry. The + character must be
the first or second character in the command
string. The ? characters must follow a comma at
the end of the string, and there must be one for
each digit in the extension. If the ? characters
are included in the dialing command, it is not
possible for the caller to enter a new callback
number, only an extension for the programmed
callback number.
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7
Solving
Problems
7 Solving Problems
Introduction
Your modem was thoroughly tested at the factory before it was shipped.
If you are unable to make a successful connection, or if you experience
data loss or garbled characters during your connection, it is possible that
the modem is defective. However, it is more likely that the source of your
problem lies elsewhere. The following symptoms are typical of problems
you might encounter:
• None of the LEDs light when the modem is on.
• The modem does not respond to commands.
• The modem dials but is unable to make a connection.
• The modem disconnects while online.
• The modem cannot connect when answering.
• File transfer is slower than it should be.
• Data is being lost.
• There are garbage characters on the monitor.
• The modem doesn’t work with Caller ID.
• Fax and data software can’t run at the same time.
If you experience problems, please check the following possibilities be-
fore calling Technical Support (see Appendix D).
None of the Indicators Light
When you turn on the modem, the LED indicators on the front panel
should flash briefly as the modem runs a self-test. If the LEDs remain off,
the modem is probably not receiving power.
Make sure the modem’s power switch is on, especially if you normally
turn on the modem by turning on a power strip.
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User Guide
If the power supply is plugged into a power strip, make sure the
power strip is plugged in and its power switch is on.
Make sure the power supply module is firmly connected to the mo-
dem and to the wall outlet or power strip.
If the power strip is on and the modem switch is on, try moving the
modem power supply to another outlet on the power strip.
Test that the outlet is live by plugging a lamp into it.
The modem or power supply may be defective. If you have another
Multi-Tech modem, try swapping modems. If the problem goes
away, the first modem or power supply may be defective. Call Tech
Support for assistance.
CAUTION: Do not under any circumstances replace the power supply
module with one designed for another product, as it can damage the
modem and void your warranty.
The Modem Does Not Respond to Commands
Make sure the modem is plugged in and turned on. (See “None of
the Indicators Light.”)
Make sure you are issuing the modem commands from the data
communications software, either manually in terminal mode or auto-
matically by configuring the software. (You cannot send commands
to the modem from the DOS prompt.)
Make sure you are in terminal mode in your data communications
program, then type AT and press ENTER. If you get an OK re-
sponse, your connections are good and the problem likely is in the
connection setup in your communications software.
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7 Solving Problems
Try resetting your modem by turning it off and on. If you are using
DOS or Windows 3.1 communications software, make sure the ini-
tialization string includes &F as the first command, to cancel any
“leftover’ command that could affect the modem’s operation.
If you don’t get an OK, the problem may still be in the communica-
tions software. Make sure you have done whatever is necessary in
your software to make a port connection. Not all communications
programs connect to the COM port automatically. Some connect
when the software loads and remain connected until the program
terminates. Others can disconnect without exiting the program. The
modem’s TR indicator lights to show that the software has taken
control of the modem through the COM port.
Your communications software settings may not match the physical
port the modem is connected to. The serial cable might be plugged
into the wrong connector—check your computer documentation to
make sure. Or you might have selected a COM port in your software
other than the one the modem is physically connected to—compare
the settings in your software to the physical connection.
If the modem is on, the cable is plugged into the correct port, the
communications software is configured correctly, and you still don’t
get an OK, the fault might be in the serial cable. Make sure it is firmly
connected at both ends.
Is this the first time you have used the cable? If so, it may not be
wired correctly. Check the cable description on the packaging to
make sure the cable is the right one for your computer.
Peripheral expansion cards, such as sound and game cards, might
include a serial port preconfigured as COM1 or COM2. The extra seri-
al port, or the card itself, may use the same COM port, memory
address, or interrupt request (IRQ) as your communications port. Be
sure to disable any unused ports.
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To look for address or IRQ conflicts if you use Windows 3.1x, select
File | Run in Program Manager, type MSD, and press ENTER. Then
select Mouse, COM Ports, and IRQ Status and note the addresses
and IRQs that are in use. If you find an IRQ conflict, note which IRQs
are not being used, then change one of the conflicting devices to use
one of the unused IRQs. If you find an address conflict, change the
address of one of the conflicting devices.
To change a port address or IRQ in Windows 3.1x, double-click the
Control Panel icon, then the Ports icon. Click on the port you want to
change, click Settings, click Advanced, and select the new port ad-
dress and/or interrupt. If you wish to use COM3 or COM4, note that
COM3 shares an IRQ with COM1, as does COM4 with COM2, so you
should change their IRQs to unused ones, if possible.
If you use Windows 95, right-click on My Computer, select Properties
from the menu, click on the Device Manager tab, double-click on
Ports, then double-click on the communications port your modem is
connected to. In the port’s Properties sheet, click on the Resources
tab to see the port’s input/output range and interrupt request. If anoth-
er device is using the same address range or IRQ, it will appear in the
Conflicting Device List. Uncheck Use automatic settings to
change the port’s settings so they do not conflict with the other de-
vice, or select the port the conflicting device is on and change it
instead. If you need to open your computer to change switches or
jumpers on the conflicting device; refer to the device’s documentation.
The serial port might be defective. If you have another serial port,
install the modem on it, change the COM port setting in your soft-
ware, and try again.
The modem might be defective. If you have another Multi-Tech mo-
dem, try swapping modems. If the problem goes away, the first
modem is possibly defective. Call Tech Support for assistance (see
Appendix D).
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7 Solving Problems
The Modem Dials But Cannot Connect
There can be several reasons the ZBA fails to make a connection. Pos-
sibilities include
• lack of a physical connection to the telephone line.
• a wrong dial tone.
• a busy signal.
• a wrong number.
• no modem at the other end.
• a faulty modem, computer, or software at the other end.
• incompatibility between modems.
You can narrow the list of possibilities by using extended result codes.
Extended result codes are enabled by default. If they have been dis-
abled, enter ATV1X4 and press ENTER while in terminal mode, or in-
clude V1X4 in the modem’s initialization string. When you dial again, the
modem will report the call’s progress.
If the modem reports NO DIALTONE, check that the modem’s tele-
phone line cable is connected to both the modem’s LINE jack (not the
PHONE jack) and the telephone wall jack. If the cable looks secure,
try replacing it. If that doesn’t work, the problem might be in your
building’s telephone installation. To test the building installation, plug
a telephone into your modem’s telephone wall jack and listen for a
dial tone. If you hear a dial tone, your modem might be installed be-
hind a company phone system (PBX) with an internal dial tone that
sounds different from the normal dial tone. In that case, the modem
might not recognize the dial tone and might treat it as an error. Check
your PBX manual to see if you can change the internal dial tone; if
you can’t, change your modem’s initialization string to replace X4 with
X3, which will cause the modem to ignore dial tones (note, however,
that X3 is not allowed in some countries, such as France and Spain).
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User Guide
If the modem reports BUSY, the other number might be busy, in
which case you should try again later, or it might indicate that you
have failed to add a 9, prefix to the phone number if you must dial 9
for an outside line.
If you must dial 9 to get an outside line, the easiest way to dial it auto-
matically is to include it in the modem’s dial prefix, e.g., ATDT9,. Note
the comma, which inserts a pause before the number is dialed. By
inserting 9, into the dial prefix, you do not have to include it in each
directory entry.
To change the dial prefix in Windows 95 HyperTerminal, select Con-
nect from the Call menu, click Dialing Properties, and type 9 in the
local and long distance boxes in How I dial from this location.
If the modem reports NO ANSWER, the other system has failed to
go off-hook, or you might have dialed a wrong number. Check the
number.
If the modem reports NO CARRIER, the phone was answered at the
other end, but no connection was made. You might have dialed a
wrong number, and a person answered instead of a computer, or you
might have dialed the correct number but the other computer or soft-
ware was turned off or faulty. Check the number and try again, or try
calling another system to make sure your modem is working. Also, try
calling the number on your telephone. If you hear harsh sounds, then
another modem is answering the call, and the modems might be hav-
ing problems negotiating because of modem incompatibilities or line
noise. Try connecting at a lower speed.
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7 Solving Problems
The Modem Disconnects While Online
If you have Call Waiting on the same phone line as your modem, it
can interrupt your connection when someone tries to call you. If you
have Call Waiting, disable it before each call. In most telephone
areas in North America, you can disable Call Waiting by preceding
the telephone number with *70 (check with your local telephone
company).
You can automatically disable Call Waiting by including the disabling
code in the modem’s dial prefix (e.g., ATDT*70,—note the comma,
which inserts a pause before the number is dialed). To change the
dial prefix in Windows Terminal, select Settings | Modem Com-
mands. To change it in Windows 95 HyperTerminal, select Connect
from the Call menu, click Dialing Properties, check This location
has Call Waiting, and select the correct code for your phone service.
If you have extension phones on the same line as your modem, you
or someone else can interrupt the connection by picking up another
phone. If this is a frequent problem, disconnect the extension phones
before using the modem, or install another phone line especially for
the modem.
Check for loose connections between the modem and the computer,
the telephone jack, and AC power.
You might have had a poor connection because of line conditions or
the problem might have originated on the other end of the line. Try
again.
If you were online with a BBS or an online service like CompuServe,
it might have hung up on you because of lack of activity on your part
or because you exceeded your time limit for the day. Try again.
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User Guide
The Modem Cannot Connect When Answering
Autoanswer might be disabled. Turn on autoanswer in your data-
comm program or send the command ATS0=1 (ATS0=2 if you have
Caller ID service) to your modem in terminal mode.
File Transfer Is Slower Than It Should Be
You might have an older UART. For best throughput, install a
16550AFN UART or a Multi-Tech ISI serial port card. See the “Quick
Start” chapter for information on how to identify your UART.
If you are running under Windows 3.1 and have a 16550AFN UART,
you must replace the Windows serial driver, COMM.DRV, to take full
advantage of the UART’s speed.
If you are using a slow transfer protocol, such as Xmodem or Kermit,
try Zmodem or Ymodem/G instead.
Is your line noisy? If there is static on your line, the modem has to
resend many blocks of data to insure accuracy. You must have a
clean line for maximum speed.
Are you downloading a compressed file with MNP 5 hardware com-
pression enabled? Since hardware data compression cannot
compress a file already compressed by an archiving program, the
transfer can be marginally slower with data compression enabled than
with it disabled.
Try entering the I11 ommand in online mode to display diagnostic
information, making a screen print of the diagnostics listing, and
checking for parameters that might be unacceptable (number of re-
trains, round trip delay, etc.).
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7 Solving Problems
Data Is Being Lost
If you are using data compression and a high speed serial port, set
the serial port baud rate to four times the data rate.
Your UART might not be reliable at serial port speeds over 9600 bps
or 19,200 bps. Turn off data compression, reset your serial port
speed to a lower rate, or replace your serial port with a faster one.
Make sure the flow control method you selected in software match-
es the method selected in the modem. If you have a Macintosh, you
might have the wrong cable for hardware flow control.
If you are running under Windows 3.1 and have a 16550AFN UART,
you might need to turn on the 16550’s data buffers and/or replace
the Windows serial driver, COMM.DRV.
Try entering the I11 ommand in online mode to display diagnostic
information, making a screen print of the diagnostics listing, and
checking for parameters that might be unacceptable (number of re-
trains, round trip delay, etc.).
There Are Garbage Characters on the Monitor
Your computer and the remote computer might be set to different
word lengths, stop bits, or parities. If you have connected at 8-N-1,
try changing to 7-E-1, or vice-versa, using your communications
software.
You might be experiencing line noise. Enable error correction, if it is
disabled, or hang up and call again; you might get a better connection
the second time.
At speeds above 2400 bps, the remote modem might not use the
same transmission or error correction standards as your modem. Try
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User Guide
connecting at a slower speed or disabling error correction. (With no
error correction, however, line noise can cause garbage characters.)
Try entering the I11 ommand in online mode to display diagnostic
information, making a screen print of the diagnostics listing, and
checking for parameters that might be unacceptable (number of re-
trains, round trip delay, etc.).
The Modem Doesn’t Work with Caller ID
Caller ID information is transmitted between the first and second
rings, so if autoanswer is turned off (S0=0) or if the modem is set to
answer after only one ring (S0=1), the modem will not receive Caller
ID information. Check your initialization string, and if necessary
change it to set the modem to answer after the second ring (S0=2).
Make sure that you have Caller ID service from your telephone com-
pany.
Fax and Data Software Can’t Run at the Same Time
Communications devices can be accessed by only one application at a
time. Under DOS or Windows 3.1x, you can run either your fax software
or your datacomm software, but not both at the same time, unless you
have a special communications device management application. In
Windows 95, you can have data and fax communication applications
open at the same time, but they cannot use the same modem at the
same time.
112
Appendixes
A Regulatory Compliance
Appendix A: Regulatory Compliance
FCC Regulations for Telephone Line
Interconnection
1. This equipment complies with Part 68 of the Federal Communications
Commission (FCC) rules. On the outside surface of this equipment
is a label that contains, among other information, the FCC registra-
tion number and ringer equivalence number (REN). If requested,
this information must be provided to the telephone company.
2. The suitable USOC jack (Universal Service Order Code connecting
arrangement) for this equipment is shown below. If applicable, the
facility interface codes (FIC) and service order codes (SOC) are shown.
An FCC-compliant telephone cord and modular plug is provided with
this equipment. This equipment is designed to be connected to the
telephone network or premises wiring using a compatible modular
jack that is Part 68 compliant. See installation instructions for details.
3. The ringer equivalence number (REN) is used to determine the
quantity of devices that may be connected to the telephone line.
Excessive RENs on the telephone line may result in the devices not
ringing in response to an incoming call. In most, but not all areas,
the sum of the RENs should not exceed five (5.0). To learn the number
of devices that may be connected to the line, contact the telephone
company to determine the maximum REN for the calling area.
4. If this equipment causes harm to the telephone network, the tele-
phone company will notify you in advance that temporary discontinu-
ance of service may be required. But if advance notice isn’t
practical, the telephone company will notify you as soon as possible.
Also, you will be advised of your right to file a complaint with the
FCC if you believe it is necessary.
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User Guide
5. The telephone company may make changes in its facilities, equip-
ment, operations, or procedures that could affect the operation of
the equipment. If this happens, the telephone company will provide
advance notice in order for you to make necessary modifications in
order to maintain uninterrupted service.
6. If trouble is experienced with this equipment (the model of which is
indicated below) please contact Multi-Tech Systems, Inc. at the ad-
dress shown below for details of how to have repairs made. If the
trouble is causing harm to the telephone network, the telephone
company may request you remove the equipment from the network
until the problem is resolved.
7. No repairs are to be made by you. Repairs are to be made only by
Multi-Tech Systems or its licensees. Unauthorized repairs void reg-
istration and warranty.
8. This equipment cannot be used on the public coin service provided
by the telephone company. Connection to Party Line Service is sub-
ject to state tariffs. (Contact the state public utility commission, pub-
lic service commission or corporation commission for information.)
9. If so required, this equipment is hearing-aid compatible.
Manufacturer:
Model Number:
FCC Registration No:
Ringer Equivalence:
Modular Jack (USOC):
Multi-Tech Systems, Inc.
MT5634ZBA or MT5634ZBAV
AU7USA-24713-M5-E
0.3B
RJ11C or RJ11W (single line)
Service Center in USA: Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, MN 55112
(800) 328-9717
(612) 785-3500
(612) 785-9874 FAX
116
A Regulatory Compliance
Canadian Limitations Notice
Notice: The Industry Canada label identifies certificated equipment.
This certification means that the equipment meets certain telecommuni-
cations network protective, operational and safety requirements. The
Industry Canada label does not guarantee the equipment will operate to
the user’s satisfaction.
Before installing this equipment, users should insure that it is permissi-
ble to be connected to the facilities of the local telecommunications
company. The equipment must also be installed using an acceptable
method of connection. In some cases, the company’s inside wiring as-
sociated with a single line individual service may be extended by means
of a certified connector assembly (telephone extension cord). The cus-
tomer should be aware that compliance with the above conditions may
not prevent degradation of service in some situations.
Repairs to certified equipment should be made by an authorized Cana-
dian maintenance facility designated by the supplier. Any repairs or
alterations made by the user to this equipment; or equipment malfunc-
tions, may give the telecommunications company cause to request the
user to disconnect the equipment.
Users should insure for their own protection that the electrical ground
connections of the power utility, telephone lines and internal metallic
water pipe system, if present, are connected together. This precaution
may be particularly important in rural areas.
Caution: Users should not attempt to make such connections them-
selves, but should contact the appropriate electric inspection authority,
or electrician, as appropriate.
The ringer equivalence number (REN) assigned to each terminal device
provides an indication of the maximum number of terminals allowed to
be connected to a telephone interface. The termination on an interface
117
User Guide
may consist of any combination of devices subject only to the require-
ment that the sum of the ringer equivalence numbers of all the devices
does not exceed 5.
This digital apparatus does not exceed the Class B limits for radio noise
for digital apparatus set out in ICES-003 of Industry Canada.
Le présent appareil numérique n’émet pas de bruits radioélectriques
dépassant les limites applicables aux appareils numériques de la classe
B prescrites dans le Règlement sur le brouillage radioélectrique édicté
par le ministère des Communications du Canada.
FCC Fax Update
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.
118
A Regulatory Compliance
Compliance with BABT Requirements
Approved for connection to telecommunications system specified in the
instructions for use subject to the conditions set out in them.
Warning: Interconnection directly, or by way of other apparatus, of
ports marked “SAFETY WARNING see instructions for use” with ports
marked or not so marked may produce hazardous conditions on the
network. Advice should be obtained from a competent engineer before
such a connection is made.
Telephones that connect to the external socket must be approved for
direct connection to the Public Switched Telephone Network (PSTN).
This apparatus has been approved for the use of the following facilities:
•
•
•
•
•
•
•
•
•
•
Auto-calling
Loop disconnect and MF dialing
Phone number storage and retrieval by a predetermined code
Operation in the absence of proceed indication
Automatic storage of last number dialed
Tone detection-busy
Auto clear from the originating end
DTR dialing
Modem
PBX timed break register recall
Any other usage will invalidate the approval of the apparatus if, as a
result, it then ceases to comply with the standards against which ap-
proval was granted.
119
User Guide
European Low Voltage Directive
When correctly installed, the modem will present no hazard to the user.
When correctly installed, the modem will be connected to the PSTN or
a PW and to a Data Terminal Equipment (DTE), whose modem connec-
tions comply with ITU-T recommendation V.28. The DTE connections
are therefore taken to be safe voltages (less than ±30 volts).
Ports that are capable of connecting to other apparatus are defined as
SELV. To ensure conformity with EN60950, ensure that these ports are
only connected to ports of the same type on other apparatus.
The main power source shall be installed near to the equipment and
shall be easily accessible. The plug that connects the apparatus to the
mains power supply must be fitted with a 5A fuse that complies with
BS1362.
EMC and Safety Compliance
The CE mark is affixed to the enclosed MultiTech product to confirm
compliance with the following European Community Directives:
•
•
Council Directive 89/336/EEC of 3 May 1989 on the approximation of
the laws of Member States relating to electromagnetic compatibility;
and
Council Directive 73/23/EEC of 19 February 1973 on the harmoniza-
tion of the laws of Member States relating to electrical equipment
designed for use within certain voltage limits;
both amended by
Council Directive 93/68/EEC of 22 July 1993 on the harmonization of
CE marking requirements.
120
A Regulatory Compliance
Australian Modem Warning Notice
Modems connected to the Australian telecommunications network must
have a valid AUSTEL permit. This modem has been specifically config-
ured to ensure compliance with AUSTEL Standards. The following
commands can affect compliance and must not be set outside the per-
missible range.
Modem Commands
Command Default
Permissible Range
—
A:
Do not use
ATB
B0
Do not change
Do not change
Do not change
AT&G
AT&P
ATSn
&G2
&P1
see table below —
S-Register Default
S6
Permissible Range
4
2–5
Call Attempts/Retries
Applications software shall be configured so that no more than 3 at-
tempts are made to establish a connection to a given number. (Note: if
the modem can detect service tones, up to 10 attempts can be made).
There must be at least 2 seconds between call attempts. If the call se-
quence is unsuccessful, there shall be a delay of at least 30 minutes
before attempting to call the number again.
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User Guide
Warning: Failure to set the modem, and any communications software
used with the modem, to the values shown above will result in the mo-
dem being operated in a non-compliant manner. Consequently, there
would be no permit in force for this equipment, and the Telecommuni-
cations Act 1991 prescribes a penalty of $12,000 for the connection of
non-permitted equipment.
Use of Supplied Power Transformer
The power transformer supplied with the modem is the only one that
should be used. Use of any other transformer could cause damage to
the modem.
For Voice Modems
Distortion may be generated because of low bit rate voice, and reduced
voice quality may result.
Warning: For safety reasons, only connect AUSTEL permitted or
AUSTEL certified equipment.
122
A Regulatory Compliance
New Zealand Telecom Warning Notice
Use of pulse dialing, when this equipment is connected to the same line
as other equipment, may give rise to ‘bell tinkle’ or noise and may also
cause a false answer condition. Should such problems occur, the user
should NOT contact the Telecom Faults Service.
The preferred method of dialing is to use DTMF tones, as this is faster
than pulse (decadic) dialing and is readily available on almost all New
Zealand telephone exchanges.
Warning Notice: No '111' or other calls can be made from this device
during a mains power failure.
Use of Supplied Power Transformer
The power transformer supplied with the modem is the only one that
should be used. Use of any other transformer could cause damage to
the modem.
123
User Guide
124
B Technical Specifications
Appendix B: Technical Specifications
Your MultiModemZBA or MultiModemZBAV fax modem meets the fol-
lowing specifications:
Trade Name
MultiModemZBA™ or MultiModemZBAV™
MT5634ZBA or MT5634ZBAV
Model Number
Client-to-Server
Data Rates
K56flex speeds when accessing an ISP type
K56flex server (actual speed depends on serv-
er capabilities and line conditions) *
Client-to-Client
Data Rates
33,600, 31,200, 28,800, 26,400, 24,000,
21,600,
19,200, 16,800, 14,400, 12,000, 9600, 7200,
4800, 2400, 1200, 0-300 bps
Fax Data Rates
Data Format
14,400, 9600, 7200, 4800, 2400, 300 bps
Serial, binary, asynchronous
Modem Compatibility K56flex; ITU-T V.34 enhanced, V.34,
V.32terbo, V.32bis, V.32, V.22bis, V.22; Bell
212A and 103/113; ITU-T V.29, V.42, V.42bis;
ITU-T V.21 & V.23 in international versions
Fax Compatibility
ITU-T Group 3, Class 1 and 2, T.4, T.30, V.21,
V.27ter, V.29, V.17, and TIA/EIA TR29.2
Voice Compatiblity
Video Compatiblity
TIA/EIA IS-101 (MT5634ZBAV only)
ITU-T V.80 for H.324 video conferencing
*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.
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User Guide
Error Correction
ITU-T V.42 (LAP-M or MNP 3–4)
Data Compression
ITU-T V.42bis (4:1 throughput), MNP 5 (2:1
throughput)
Speed Conversion
Mode of Operation
Serial port data rates adjustable to 300, 1200,
2400, 4800, 9600, 19,200, 38,400, 57,600,
115,200, and 230,400 bps
Fax online modes; full duplex over dial-up
lines; AT and AT+V command modes support-
ing answering machine and voice mail func-
tions (MT5634ZBAV only)
Flow Control
XON/XOFF (software), RTS/CTS (hardware)
Intelligent Features
Plug and play; fully AT command compatible;
autodial, redial, repeat dial; pulse or tone dial;
dial pauses; auto answer; caller ID; EIA ex-
tended automode; adaptive line probing; auto-
matic symbol and carrier frequency during
start-up, retrain, and rate renrgotiation; DTMF
detection; call status display, auto-parity and
data rate selections; keyboard-controlled mo-
dem options; non-volatile memory; on-screen
displays for modem option parameters; com-
mand lines of up to 40 characters each; help
menus; remote configuration; DTR dialing;
callback security; 11-bit support.
Command Buffer
Data Modulation
40 characters
FSK at 300 bps, PSK at 1200 bps, QAM at
2400, 4800, and 9600 bps (non-trellis), QAM
with trellis-coded modulation (TCM) at 9600,
12,000, 14,400, 16,800, 19,200, 21,600,
24,000, 26,400, 28,800, 31,200, 33,600, and
56,000 bps
126
B Technical Specifications
Fax Modulation
V.21 CH2 FSK at 300 bps (half duplex)
V.27ter DPSK at 4800 and 2400 bps
V.29 QAM at 9600 and 7200 bps
V.17TCM at 14400, 12000, 9600, and 7200 bps
Carrier Frequencies
ITU-T V.34
1600, 1646, 1680, 1800, 1829, 1867, 1920,
1959, 2000 Hz
Carrier Frequencies
AT&T V.32 terbo/
ITU-T V.32bis/V.32
1800 Hz
Carrier Frequencies
V.22bis/V.22 or
Bell 212A Standard Receive originate:
Transmit originate:
Transmit answer:
1200 Hz
2400 Hz
2400 Hz
1200 Hz
(2400 & 1200 bps)
Receive answer:
Carrier Frequencies
ITU-T V.23
(1200 bps)
Transmit originate:
390 Hz mark
450 Hz space
1300 Hz mark
2100 Hz space
1300 Hz mark
2100 Hz space
390 Hz mark
450 Hz space
Receive originate:
Transmit answer:
Receive answer:
Carrier Frequencies
ITU-T V.21
(0–300 bps)
Transmit originate:
Receive originate:
Transmit answer:
Receive answer:
980 Hz mark
1180 Hz space
1650 Hz mark
1850 Hz space
1650 Hz mark
1850 Hz space
980 Hz mark
1180 Hz space
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User Guide
Carrier Frequencies
Bell 103/113
(0–300 bps)
Transmit originate:
Receive originate:
Transmit answer:
Receive answer:
1270 Hz mark
1070 Hz space
2225 Hz mark
2025 Hz space
2225 Hz mark
2025 Hz space
1270 Hz mark
1070 Hz space
Fax Carrier
V.21 Ch2 (half duplex):
Frequencies
1650 Hz mark, 1850 HZ space for transmit
originate
1650 HZ mark, 1850 Hz space for transmit
answer
V.27ter: 1800 Hz originate/answer
V.29 QAM: 1800 Hz originate/answer
V.17 TCM: 1800 Hz originate/answer
Voice Compression
and Sampling Rate
(MT5634ZBAV only)
PCM 128, 8000 Hz, or IMA ADPCM, 8000 Hz,
(selectable via +V commands). Note that your
computer system should have a processing
speed of at least 75 MHz to take full advan-
tage of the telephony features of this product.
Transmit Level
-11 dBm (dial-up)
Frequency Stability
Receiver Sensitivity
±0.01%
-43 dBm under worst-case conditions
AGC Dynamic Range 43 dB
Interface
EIA RS-232C/ITU-T V.24/V.28
Connectors
DB25 RS-232C connector; two RJ-11 phone
jacks (one RJ-11 jack on UK and international
modems), power jack; 1/8-inch stereo speaker
jack and microphone jack on ZBAV model.
128
B Technical Specifications
Cables
One 14-foot RJ-11 phone cable (USA); coun-
try-specific cord for UK and International mod-
els; external power transformer and cord
Note: Any cables connected to the computer
should be shielded to reduce interference.
Diagnostics
Indicators
Power-on self test, local analog loop, local
digital loop, remote digital loop.
LEDs for Transmit Data, Receive Data, Carrier
Detect, 56K bps, 33.6K bps, 14.4K bps, Off
Hook, Terminal Ready, Error Correction, Fax.
Speaker
Command-controlled 2-inch speaker for call
progress monitoring.
Manual Control
Environmental
ON/OFF power switch
Temperature range 0°–50°C (32°–120°F); hu-
midity range 20–90% (non-condensing)
Power Requirements 100–130VAC, 50/60 Hz, 5 W; two-prong out-
let-mounted transformer (included); 230V/50
Hz optional (international)
Power Consumption 9 VDC, 300 mA maximum transformer output
Dimensions
10.8 cm wide x 14.8 cm long x 2.9 cm high
(4.25" x 5.8" x 1.15")
Weight
224 g (8 oz)
Limited Warranty
10 years in the U.S.A., U.K., Canada, and
Mexico; 5 years elsewhere
129
User Guide
130
C Loopback Tests
Appendix C: Loopback Tests
Introduction
Each time you turn on your modem, it performs an automatic self-test
to ensure proper operation. Your modem also has three diagnostic
tests: local analog loopback, remote digital loopback, and local digital
loopback. These ITU-T V.54 loopback tests isolate telephone circuit
and transmission problems.
In a loopback test, data from your computer loops through the circuits
of your modem and/or a remote modem before it appears on your moni-
tor. When the loop has been completed, the data on your PC’s monitor
should match the original data.
The local analog loopback test allows you to verify that the modem’s
transmitter and receiver circuits are functioning properly.
The local digital loopback allows you to verify that the local computer or
terminal, the two modems, and the transmission line between them are
functioning properly.
The remote digital loopback test allows you to verify that the remote
computer or terminal, the remote modem, the serial ports, the tele-
phone line, and the local modem are functioning properly.
Note: All loopback tests operate at all speeds except 300 bps.
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User Guide
Local Analog Loopback Test (V.54 Loop 3)
In this test, data from your computer or terminal is sent to your mo-
dem’s transmitter, converted into analog form, looped back to the mo-
dem’s receiver, converted into digital form, and then sent to your
monitor for verification. No connection to the phone line is required.
AT&T1
CONNECT
UUUUUUUUU
UUU
Digital Analog
Computer or Terminal
Local MultiModem
Figure C-1. Local analog loopback test.
Test procedure
1. Connect the modem to your computer. Using your communication
program, set the desired baud rate and go into terminal mode.
2. Type AT&T1 and press ENTER. This places your modem in analog
loopback mode in the originate mode. A CONNECT message should
appear on your display. The modem is now out of command mode
and in a pseudo-online mode.
3. Note that the CD LED is on. If you are set for 14,400 bps or higher,
a speed LED should be on. If the CD LED is not on, there is a defect
in your modem.
4. Enter characters from your keyboard. For this test, typing multiple
uppercase U characters is a good way to send an alternating test
pattern of binary ones and zeros. The characters entered should be
132
C Loopback Tests
displayed on your monitor. The TD and RD LEDs should flash when
a character is entered.
5. To exit the test, type the escape sequence +++AT and press EN-
TER. This puts the modem in online command mode. Then type
either AT&T or ATH to return to command mode.
6. Your modem passes this test if the data received on your monitor
are the same as the data entered from your keyboard. If different
data appear on your monitor, your modem is probably causing the
problem, though it could also be your computer. If your modem
passes this test, but you are receiving errors while on line, the re-
mote modem or the phone line could be at fault.
Remote Digital Loopback Test (V.54 Loop 2)
The remote digital loopback test tests the phone lines and the circuits
of both your modem and a remote modem. In this test, your modem
must be on line with another modem that is set up to respond to a re-
quest for remote digital loopback. (Note that some modems might not
support remote digital loopback or might have it disabled.) Data from
your computer or terminal is transmitted through your modem and over
the phone line to the remote modem, where it is then looped back to
your modem.
AT&T6
OK
AT&T6
OK
UUUUUUUUU
UUUUU
Digital Analog
Analog Digital
Computer or Terminal Local MultiModem
Remote MultiModem Computer or Terminal
Figure C-2. Remote digital loopback test.
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User Guide
Test procedure
1. Arrange to have &T6 set on the remote test modem.
2. Open your communications software and go into terminal mode.
Type AT and press ENTER; you should get an OK message. Type
AT\N and press ENTER to disable error correction.
3. Dial the remote modem and establish your online connection.
4. Type the escape sequence +++AT and press ENTER to bring your
modem into online command mode.
5. Type AT&T6 and press ENTER. The local modem responds to this
command by transmitting an unscrambled marking signal, which
causes the remote modem to place itself in digital loopback mode.
Then the local modem exits online command mode and enters data
mode.
6. Enter data from your keyboard. For this test, typing multiple upper-
case U characters is a good way to send an alternating test pattern
of binary ones and zeroes. Data received by the remote modem
enters its analog receiver, is converted to digital data, is reconverted
into analog, and then is transmitted back to your modem. Your mo-
dem passes this test if the data received on your monitor is the
same as the data entered from your keyboard.
7. To exit the test, type the escape sequence +++AT and press EN-
TER. This puts the modem in online command mode. The modem
should respond with an OK message. If you wish to stay on line with
the remote modem for normal data transmission, type AT&T and
press ENTER to exit the test, then type ATO and press ENTER to
return on line. If you wish to terminate the call, type ATH and press
ENTER to hang up.
134
C Loopback Tests
Local Digital Loopback Test (V.54 Loop 2)
The local digital loopback test is identical to the remote digital loopback
test with one exception. Instead of using your modem to signal a re-
mote modem to place itself in digital loopback mode, your modem is
placed in digital loopback mode while the remote modem is not. Data is
entered and transmitted from the remote modem, sent across the
phone line to your modem, and looped back to the remote modem.
AT&T3
OK
UUUUUUUUU
UUUUU
Digital Analog
Analog Digital
Computer or Terminal Local MultiModem
Remote MultiModem Computer or Terminal
Figure C-3. Local digital loopback test
Test procedure
1. Open your communications software and go into terminal mode.
Type AT and press ENTER; you should get an OK message. Type
AT\N and press ENTER to disable error correction.
2. Dial the remote modem and establish your online connection.
3. Type the escape sequence +++AT and press ENTER to bring your
modem into online command mode.
4. Type AT&T3 and press ENTER. Once you receive an OK message
from your modem (if responses are enabled), your modem is placed
in digital loopback mode.
135
User Guide
5. Have someone enter data from the remote keyboard. For this test,
typing multiple uppercase U characters is a good way to send an
alternating test pattern of binary ones and zeros. The data received
by your modem enters its analog receiver, is converted to digital
data, is reconverted into analog, and then is transmitted back to the
remote modem. Your modem passes this test if the data received on
the remote monitor is the same as the data entered from the remote
keyboard.
6. To exit the test, type the escape sequence +++AT and press EN-
TER. This puts the modem in online command mode. The modem
should respond with an OK message. If you wish to stay on line with
the remote modem for normal data transmission, type AT&T and
press ENTER to exit the test, then type ATO and press ENTER to
return on line. If you wish to terminate the call, type ATH and press
ENTER to hang up.
136
D Warranty, Service, and Technical Support
Appendix D: Warranty, Service, and
Technical Support
Limited Warranty
Multi-Tech Systems, Inc. (MTS) warrants that this product will be free
from defects in material or workmanship for a period of ten years from
the date of purchase or, if date of purchase is not provided, ten years
from the date of shipment (limited to customers in the U.S., Canada,
Mexico, and United Kingdom). For customers in all other countries, due
to certain legal restrictions, MTS warrants that this product will be free
from defects in material or workmanship for a period of five years from
the date of purchase or, if date of purchase is not provided, five years
from the date of shipment, unless otherwise limited or prohibited by law.
MTS MAKES NO OTHER WARRANTY, EXPRESSED OR IMPLIED,
AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT-
NESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED.
This warranty does not apply to any products that have been damaged
by lightning storms, water, or power surges, or that have been neglect-
ed, altered, abused, used for a purpose other than the one for which
they were manufactured, repaired by the customer or any party without
MTS’s written authorization, or used in any manner inconsistent with
MTS’s instructions.
MTS’s entire obligation under this warranty shall be limited (at MTS’s
option) to repair or replacement of any products that prove to be defec-
tive within the warranty period, or, at MTS’s option, issuance of a re-
fund of the purchase price. Defective products must be returned by
Customer to MTS’s factory with transportation prepaid.
MTS WILL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES AND
UNDER NO CIRCUMSTANCES WILL ITS LIABILITY EXCEED THE
PURCHASE PRICE FOR DEFECTIVE PRODUCTS.
137
User Guide
Service
If you are outside the USA, your local distributor of Multi-Tech products
usually offers the quickest and most economical repair option. If neces-
sary, you may send your modem to our Mounds View factory in the
USA. A modem that is shipped to us from outside the USA must have a
Returned Materials Authorization (RMA) and shipping instructions. To
return a modem for repair from inside the USA, no RMA is required;
simply send it to us freight prepaid. Include a description of the prob-
lem, a return shipping address, and a check or purchase order for out-
of-warranty repairs.
Please send modems that require repairs to the following address:
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, MN 55112
Attn: Repair
If you are shipping from outside the USA, please contact our Repair
Department for an RMA prior to your shipment. You can contact us by
telephone at +(612) 785-3500 or by fax at +(612) 785-9874.
Technical Support
Multi-Tech Systems has an excellent staff of technical support person-
nel available to help you get the most out of your Multi-Tech product. If
you have any questions about the operation of this unit, please call
(800) 972-2439 (USA and Canada) or (612) 785-3500 (international and
local). Please have modem information available. You can also contact
Technical Support via the following URL: http://www.multitech.com/
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D Warranty, Service, and Technical Support
Online Warranty Registration
If you have access to the World Wide Web, you can register your Multi-
Tech product online at the following URL:
The Multi-Tech BBS
For customers who do not have Internet access, Multi-Tech maintains a
bulletin board system (BBS) that mirrors its FTP site. Information avail-
able from the BBS includes new product information, product upgrade
files, and problem-solving tips. The phone number for the Multi-Tech
BBS is (800) 392-2432 (USA and Canada) or (612) 785-3702 (interna-
tional and local).
The BBS can be accessed by any asynchronous modem operating at
1200 bps to 33,600 bps at a setting of 8 bits, no parity, and 1 stop bit
(8-N-1).
To Log on to the Multi-Tech BBS
1. Set your communications program to 8-N-1.
2. Dial our BBS at (800) 392-2432 (USA and Canada) or (612) 785-
3702 (international and local).
3. At the prompts, type your first name, last name, and password;
then press ENTER. If you are a first time caller, the BBS asks if
your name is spelled correctly. If you answer yes, a questionnaire
appears. You must complete the questionnaire to use the BBS on
your first call.
4. Press ENTER until the Main Menu appears. From the Main Menu
you have access to two areas: the Files Menu and News. For help
on menu commands, type ?.
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User Guide
To Download a File
If you know the file name
1. From the Main Menu, type F to access the Files Menu, then type D.
2. Enter the name of the file you wish to download from the BBS.
3. If a password is required, enter the password.
4. Answer Y or N to the automatic logoff question.
5. Select a file transfer protocol by typing the indicated letter, such as
Z for Zmodem (the recommended protocol).
6. If you select Zmodem, the transfer will begin automatically. If you
select another protocol, you may have to initiate the transfer your-
self. (In most datacomm programs, the PAGE DOWN key initiates
the download.)
7. When the download is complete, press ENTER to return to the File
Menu.
8. To exit the BBS, type G and press ENTER.
If you don’t know the file name
1. From the Main Menu, type F to access the Files Menu. For a list of
file areas, type L, press ENTER, then type L and press ENTER
again. (If you do not type the second L, you will list all of the files
on the BBS.)
2. Mark each file area you would like to examine by typing its list num-
ber and pressing ENTER.
3. Enter L to list all the files in the selected file areas. Enter C to go
forward in the file list and P to go back.
4. To mark one or more files for download, type M, press ENTER,
type the list numbers of the files, and press ENTER again.
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D Warranty, Service, and Technical Support
5. Enter D. You will see a list of the files you have marked. Enter E if
you would like to edit the list; otherwise enter D again to start the
download process.
6. Select a file transfer protocol by typing the indicated letter, such as
Z for Zmodem (the recommended protocol).
7. If you select Zmodem, the file will transfer automatically. If you se-
lect another protocol, you may have to initiate the transfer yourself.
(In most data communications programs, the PAGE DOWN key
initiates the download.)
8. When the download is complete, press ENTER to return to the File
Menu.
9. To exit the BBS, type G and press ENTER.
About the Internet
Multi-Tech is a commercial provider on the Internet, and we retrieve
e-mail messages from the following mailboxes on a periodic basis:
Technical Support
Marketing Dept.
Sales Dept.
[email protected] Publications Dept.
Multi-Tech's presence includes a Web site at
and an ftp site at
The ftp server mirrors the Multi-Tech BBS files.
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User Guide
About CompuServe
In addition to the BBS, Multi-Tech provides support through Com-
puServe’s Modem Vendor Forum (GO MODEMVEN) under GO MULTI-
TECH. Refer to your CompuServe documentation for special operating
procedures.
About the Multi-Tech Fax-Back Service
Multi-Tech's fax-back system provides 24-hour access to sales, market-
ing, and technical literature for customers in the U.S.A. Dial (612) 717-
5888, follow the voice prompts, and enter the document number for
either the Sales and Marketing catalog or the Technical Support catalog
of documents. For convenience, write your fax number in the following
space: __________________________________________.
From the Sales and Marketing catalog, you can request to have news-
letters, white papers, press releases, brochures, and other marketing
literature faxed to you. From the the Technical Support catalog, you can
request basic modem operation information and troubleshooting guides.
With either catalog, simply enter the FB Doc. number of the literature
you wish to receive.
142
E Upgrade Procedures
Appendix E: Upgrade Procedures
Introduction
Your modem is controlled by semi-permanent software, called firmware,
that is stored in flash memory. Firmware is nonvolatile; that is, it re-
mains stored in memory when the modem is turned off. However, it can
be changed by either the manufacturer or the user as bugs are fixed or
new features are added.
Since the firmware in your modem is stored in flash memory, you can
upgrade it yourself in a few minutes by using the following procedures.
Upgrade Overview
The upgrade procedure consists of the following steps, which are de-
scribed in greater detail in the following sections.
1. Identify the model number and firmware version of your modem.
2. Identify the current version of the firmware at the Multi-Tech Web
site or BBS. If your modem already has the current firmware, there
is no need to update it.
3. Download the upgrade file for your modem.
4. Extract the firmware .HEX file and the appropriate flash upgrade
program from the file you downloaded.
5. Document and clear your stored parameters.
6. Upgrade the modem’s firmware using the .HEX file and the flash
upgrade program.
7. Restore your parameters.
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User Guide
Step 1: Identify the Modem Firmware
You must know the model number and firmware version of your Multi-
Tech modem to know whether you should update it.
1. Run your favorite terminal program. If you are using Windows 95 or
Windows NT, you can use HyperTerminal. If you are using Windows
3.11, you can use Windows Terminal.
2. In the program’s terminal window, type AT&F. Even if you cannot
see the AT&F command on your screen, be sure to type it com-
pletely and then press ENTER.
3. Now type ATI and record your results. The model number and firm-
ware version should appear as shown below.
LT K56FLEX 1.1 MT5634ZBAV Serial Data/Fax/Voice
Modem Version 4.07a
Step 2: Identify the Current Firmware Version
Identify the current version of the firmware at the Multi-Tech Web site
or BBS. If your modem already has the current firmware, there is no
need to update it.
Multi-Tech Web Site
2. Scroll down to the table with your modem model number (non-USA
time).
3. Look at the Current Revision number for your modem.
144
E Upgrade Procedures
4. If the Current Revision number matches the firmware version num-
ber found in “Step 1: Identify the Modem Firmware,” your modem
has the current firmware version and does not need to be updated.
5. If the Current Revision number is larger than the firmware version
number found in “Step 1: Identify the Modem Firmware,” your mo-
dem has an older firmware version. Continue with “Step 3: Down-
load the Upgrade File.”
Multi-Tech BBS
1. Run your favorite terminal program and dial in to the Multi-Tech
BBS at 800-392-2432 (North America) or 612-785-3702 (local and
international). If you followed the download test in the “Quick Start”
chapter, your terminal program should already be configured for the
Multi-Tech BBS.
2. When the BBS welcome screen appears, 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.
3. 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 ?.
4. In the Main Menu, type F and press ENTER to access the Files Menu.
5. In the Files Menu, type L and press ENTER, then type L and press
ENTER again. A two-column list of file areas appears.
6. Press ENTER until the modem firmware area for your country is
listed.
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User Guide
7. Type the number of the modem firmware area for your country and
press ENTER.
8. Type L and press ENTER to list the files in the selected area.
9. Press ENTER until your modem model number appears.
10. Look at the version number for your modem.
11. If the version number matches the firmware version number found
in “Step 1: Identify the Modem Firmware,” your modem has the cur-
rent firmware version and does not need to be updated.
12. If the version number is larger than the firmware version number
found in “Step 1: Identify the Modem Firmware,” your modem has
an older firmware version. Continue with “Step 3: Download the
Upgrade File.”
Step 3: Download the Upgrade File
Multi-Tech Web Site
1. If you are not already at the Firmware page of the Multi-Tech Web
site, follow the procedure in “Step 2: Identify the Current Firmware.”
2. Click on the upgrade file name for your modem and save the file to
a temporary location on your hard disk.
Multi-Tech BBS
1. If you have not already found the upgrade file for your modem on
the Multi-Tech BBS, follow the procedure in “Step 2: Identify the
Current Firmware.”
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E Upgrade Procedures
2. Type the number of the upgrade file for your modem and press
ENTER.
3. Type D and press ENTER to list the file to be downloaded.
4. If the correct file is listed, press ENTER; otherwise use the Q com-
mand to return to the previous menu.
5. Type Z and press ENTER to select the Zmodem transfer protocol.
6. The download begins automatically. As the file is copied to your
hard disk, a dialog box reports on the progress of the download.
7. To log off the BBS, press ENTER, type G for “good-bye,” and press
ENTER twice more.
Step 4: Extract the Upgrade Files
1. Move the downloaded upgrade file to a temporary directory or folder
on your hard disk.
2. The file is a self-extracting archive. Extract the files by typing the
upgrade file name in DOS or double-clicking it in Windows. The
extracted files include a .HEX file, which contains the upgrade data,
and one flash program each for DOS, Windows 3.1/95, and Win-
dows NT.
Step 5: Clear Your Stored Paramenters
Before you flash your modem it is important that you issue the
AT&W1Z command to it to clear out any stored parameters. You should
also record the parameters that are currently stored in your modem so
you can reprogram it after flashing.
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User Guide
1. Run your favorite terminal program. If you are using Windows 95 or
Windows NT, you can use HyperTerminal. If you are using Windows
3.11, you can use Windows Terminal.
2. In the program’s terminal window, type AT&V and press ENTER to
list your modem’s current parameters.
3. Record your parameters by saving the screens and sending them to
your printer.
4. Type AT&W1Z and press ENTER to clear your stored parameters
and reset your modem to factory default.
5. Close the terminal program.
Step 6: Upgrade the Modem’s Firmware
Use one of the flash programs that you extracted to upgrade your mo-
dem. There are three flash programs: DOSFLASH.ZIP for DOS or Win-
dows 3.1, FLASHWIN for Windows 3.1 or Windows 95, and FLASHNT
for Windows 95 or Windows NT 4.0.
DOSFLASH
1. Copy DOSFLASH.ZIP and the downloaded .HEX file to a temporary
directory.
2. Unzip DOSFLASH.ZIP.
3. To upgrade the modem, run DOSFLASH by using the command
dflash10 x y, in which x is the number of the port the modem is
connected to and y is the IRQ number for the port. The IRQ number
is optional if you are using the standard IRQ number for the port.
For example, if your modem is connected to COM2, and COM2 has
IRQ 3 assigned to it, which is standard for that port, type either
dflash10 2 or dflash10 2 3.
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E Upgrade Procedures
FLASHWIN
1. Copy FLASHWIN.ZIP and the downloaded .HEX file to a temporary
directory.
2. Unzip FLASHWIN.ZIP.
3. Run FLASHWIN by double-clicking on its icon or file name.
4. Select the COM port your modem is on and the speed at which you
want to program.
5. Enter the name and path of the *.HEX file you want to load into the
modem.
6. When you have verified your selections, click Perform Flash to load
the firmware into the modem.
7. When Loading Status reaches 100%, the modem has been up-
graded and you may close FLASHWIN.
FLASHNT
1. Copy FLASHNT.ZIP and the downloaded .HEX file to a temporary
directory.
2. Unzip FLASHNT.ZIP.
3. Run FLASHNT.EXE by double-clicking on its icon or file name.
4. Select the COM port your modem is on and the speed that you want
to program at. The default is 57,600 bps.
5. Verify that the selected firmware file (*.HEX) is the correct one. If
necessary, use the Browse button to find the correct file.
6. Click Finish to begin upgrading your modem.
7. When the flash upgrade is complete, the message Flash Loader
has completed appears.
149
Index
Index
Symbols
56K operation
A
153
User Guide
C
B
154
Index
configuration
D
E
155
User Guide
H
I
F
J
K
L
G
156
Index
O
P
M
R
N
157
User Guide
S
speed
158
Index
U
V
T
W
159
User Guide
X
Y
160
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