Multi Tech Systems Network Card MT5600DSDV2 User Manual

and

User Guide

MultiModemDSVD User Guide

Contents

Chapter 1 - Introduction............................................................................ 6

Introduction ............................................................................................................................. 7

Product Description ................................................................................................................ 7

Features .................................................................................................................................... 7

What Is in Your Modem Package? ....................................................................................... 9

Related Manuals ..................................................................................................................... 9

Chapter 2 - Installation............................................................................ 10

Introduction ........................................................................................................................... 11

What You Will Need ............................................................................................................ 11

Safety Warnings .................................................................................................................... 11

Step 1: Mount the Feet.......................................................................................................... 12

Step 2: Change the Speaker Jumper (MT5600DSDV only) ............................................. 12

Opening the Modem ..................................................................................................... 12

Changing the Speaker Jumper ..................................................................................... 13

Step 3: Connect the Modem to Your System .................................................................... 14

RS232 Connection .......................................................................................................... 14

Line Connection ............................................................................................................. 14

Phone Connection .......................................................................................................... 15

Microphone Connection (MT5600DSDV only) ......................................................... 15

Speaker Connection (MT5600DSDV only)................................................................. 15

Power Connection ......................................................................................................... 15

Power-On Test ............................................................................................................... 15

Surge Protectors and Lightning ................................................................................... 15

Step 4: Install the Modem Driver ....................................................................................... 16

Installing the Modem Driver ....................................................................................... 16

Removing Your Old Modem Driver ........................................................................... 16

Step 5: Install PhoneTools Software ................................................................................... 17

Chapter 3 - Operation.............................................................................. 18

Introduction ........................................................................................................................... 19

Front Panel ............................................................................................................................. 19

Configuring the Modem ...................................................................................................... 20

Connecting to the Internet ................................................................................................... 20

Dial-Up Networking ............................................................................................................ 21

Dial-Up Networking in Windows 95/ 98 ................................................................... 21

Dial-Up Networking in Windows Me ........................................................................ 22

Dial-Up Networking in Windows NT 4.0 .................................................................. 22

Dial-Up Networking in Windows 2000...................................................................... 23

Fax Operation ........................................................................................................................ 24

Voice Operation .................................................................................................................... 24

To Originate a Voice Call in Speakerphone Mode ................................................... 24

To Answer a Voice Call in Speakerphone Mode ...................................................... 25

To Originate a DSVD Call Using the Headset (MT5600DSDV only)..................... 25

To Answer a DSVD Call Using the Headset (MT5600DSDV only) ....................... 26

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

Contents

Chapter 4 - AT Commands...................................................................... 27

AT Commands ...................................................................................................................... 28

AT Command Summary ..................................................................................................... 29

Voice Commands .................................................................................................................. 44

S-Registers .............................................................................................................................. 46

Result Codes .......................................................................................................................... 50

Chapter 5 - Solving Problems ............................................................... 53

Introduction ........................................................................................................................... 54

None of the Indicators Light ............................................................................................... 54

The Modem Does Not Respond to Commands................................................................ 55

The Modem Dials But Cannot Connect ............................................................................. 56

The Modem Disconnects While Online ............................................................................. 57

The Modem Cannot Connect When Answering .............................................................. 58

File Transfer Is Slower Than It Should Be ......................................................................... 58

Data Is Being Lost ................................................................................................................. 58

There Are Garbage Characters on the Monitor ................................................................ 59

The Modem Doesn’t Work with Caller ID ........................................................................ 59

Fax and Data Software Can’t Run at the Same Time ....................................................... 59

Appendix A: Regulatory Compliance .................................................... 61

FCC Part 68 Telecom ............................................................................................................ 61

FCC Part 15 ............................................................................................................................ 62

Industry Canada ................................................................................................................... 62

Fax Branding Statement ....................................................................................................... 63

Canadian Limitations Notice .............................................................................................. 63

EMC, Safety, and R&TTE Directive Compliance ............................................................. 64

International Modem Restrictions ...................................................................................... 64

Appendix B:Technical Specifications ................................................... 65

Appendix C:Warranty, Service, and

Technical Support ............................................................ 68

Multi-Tech Systems, Inc. Warranty & Repairs Policies ................................................... 68

Online Warranty Registration ...................................................................................... 69

Service ............................................................................................................................. 70

Replacement Parts ......................................................................................................... 71

Technical Support .......................................................................................................... 71

Internet Sites ................................................................................................................... 71

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

Contents

Appendix D: Upgrading the Modem....................................................... 72

Introduction ........................................................................................................................... 72

Upgrade Overview ............................................................................................................... 72

Step 1: Identify the Modem Firmware ............................................................................... 72

Step 2: Identify the Current Firmware Version ................................................................ 73

Step 3: Download the Upgrade File ................................................................................... 73

Step 4: Extract the Upgrade Files........................................................................................ 73

Step 5: Clear Your Stored Parameters ................................................................................ 73

Step 6: Upgrade the Modem’s Firmware .......................................................................... 74

Step 7: Restore Your Parameters ........................................................................................ 74

Index ......................................................................................................... 75

Multi-Tech Systems, Inc.

Ch a p t e r 1 -

In t r o d u c t io n

MultiModemDSVD User Guide

1 Introduction

In t r o d u ct io n

Congratulations on your purchase of your MultiModemDSVD! You have acquired

not only one of the finest intelligent data, fax, and voice modems available, but a

modem that can transmit voice and data at the same time. This user guide will help

you to install, configure, test, and use your modem.

Pr o d u ct De s cr ip t io n

The MultiModemDSVD modem incorporates both the ITU-T V.90 and the K56flex^™

protocols, both of which enable Internet connections at data rates up to 53K bps*

over standard telephone lines. Using these protocols, Internet service providers

(ISPs) are able to send data downstream to your computer at high speeds because

data on the telephone network normally is converted from digital to analog only once

before it reaches your modem. Upstream transmissions, and transmissions between

client modems, are limited to data rates of 33.6K bps, as are downstream transmis-

sions that are converted more than once on the telephone network.

The MultiModemDSVD offers interactive automatic dialing and command mode

configuration. You can store up to four command line/ telephone numbers of up to

40 characters each in the modem’s nonvolatile memory. The modem pulse or tone

dials, and recognizes dial tones and busy signals for reliable call-progress detection.

The modem can also detect AT&T calling card tones. It is FCC-Registered for con-

nection to telephone networks without notification to the telephone company.

Digital simultaneous voice and data (DSVD) operation allows data transfer and

voice conversation to occur simultaneously during a data connection. On a DSVD

call, a headset or microphone and speaker can be used as the voice interface. Both

local and remote modems must have compatible DSVD technology to support the

DSVD function. The MultiModemDSVD is compatible with the industry-standard

ITU-T V.70 DSVD specification.

Fe a t u r e s

General

• Complies with major ITU-T, TIA, and EIA international standards to ensure com-

patibility with other modems.

• Distinguishes data, fax, or voice calls using DTMF and tone detection with soft-

ware packages supporting these features.

• Supports serial port speeds to 230.4K bps with compatible serial ports

• On U.S. products, includes Caller ID to identify your caller’s phone number.

*Though this modem is capable of 56K bps download performance, line impairments, public

telephone infrastructure, and other external technological factors currently prevent maxi-

mum 56K bps connections.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

1 Introduction

Data

• Supports the ITU-T V.90 and K56flex^TMstandards for data transmission speeds up

to 56K bps while maintaining compatibility with lower-speed modems.

Note: Under the 56K bps standards, you can asymmetrically download data from an

ISP at speeds up to 53K bps, whereas you can upload only at speeds up to 33.6K bps.

• Supports the enhanced ITU-T V.34 standard, with data transmission speeds to

33.6K bps, while maintaining compatibility with lower-speed modems.

• Supports V.90 and K56flex speeds plus 33.6K, 31.2K, 28.8K, 26.4K, 24K, 21.6K,

19.2K, 16.8K, 14.4K, 12K, 9.6K, 7.2K, 4.8K, 2.4K, 1.2K, and 0–300 bps.

• Supports automatic fallback to slower speeds in noisy line conditions, and fall-

forward to faster speeds as conditions improve.

• Supports ITU-T V.42 LAP-M and MNP Class 3 and 4 error correction.

• Supports ITU-T V.42bis (4-to-1) and MNP 5 (2-to-1) data compression.

• Automatically disables compression when transferring already-compressed files.

• Can autodial, redial, pulse (rotary) and touch-tone dial.

• Detects dial tones and busy signals for reliable call-progress detection.

• Compatible with the standard AT command set used by most communication

programs.

• Has MNP10 data throughput enhancement.

• Supports the H.324 protocol (videophone ready).

• Supports distinctive rings to route voice, data, or fax calls on a single phone line.

• Supports Plug and Play (PnP).

• Can be upgraded by flash programming.

Fax

• Supports V.17, Class 1, Class 2, and Group 3 fax communication standards, allow-

ing it to communicate with other fax modems as well as with fax machines.

• Sends and receives faxes from your computer at 14,400 bps, 9600 bps, 7200 bps,

4800 bps, 2400 bps, or 300 bps.

Voice

• Full-duplex speakerphone support with adjustable speaker volume control. Can

record and play back answering machine messages using included microphone

and speaker.

• Remote/ local telephone answering machine (TAM) capabilities include voice

mail control, record and playback, and call screening.

• Supports AT#V voice commands.

• Supports DSVD digital simultaneous voice and data.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

1 Introduction

W h a t Is in Yo u r M o d e m Pa ck a ge ?

Your modem package has several components. Make sure you have them all before

trying to operate your modem. Your package should include:

• One MT5600DSVD modem

One DC power supply

•

One set of four plastic feet

One modular telephone cable

One headset (MT5600DSDV only)

A printed Quick Start Guide

A system CD containing modem drivers, the User Guide, PhoneTools (a data

communications program), and Acrobat Reader.

If any of these items are missing, please contact Multi-Tech Systems or your dealer/ dis-

tributor (see Appendix D for information on contacting Multi-Tech via telephone, fax, or

the Internet).

Re la t e d M a n u a ls

The following manuals are available from the Multi-Tech World Wide Web and FTP

sites.

82076200 MT56XX Fax Class 1 Developer’s Guide

ftp://ftp.multitech.com/manuals/pdf/developers%20kits/5600fax.pdf

82006502 Fax Class 2 Developers’s Kit

ftp://ftp.multitech.com/manuals/pdf/developers%20kits/82006502.pdf

Multi-Tech Systems, Inc.

Ch a p t e r 2 -

In s t a lla t io n

MultiModemDSVD User Guide

2 Installation

In t r o d u ct io n

This chapter shows step-by-step how to set up your MultiModemDSVD and

configure your communications software to work with it.

W h a t Yo u W ill Ne e d

Before starting, please make sure you have everything you need:

We supply

✔ An MT5600DSVD data/ fax/ voice modem

✔ A DC power supply module

✔ A set of four plastic feet

✔ A modular telephone cable

✔ A headset (MT5600DSDV only)

✔ A system CD containing drivers, a User Guide, Phone Tools (a data communica-

tions program), and Acrobat Reader

✔ A printed Quick Start Guide

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 (MT5600DSDV only)

✔ An optional amplified speaker or sound card with speakers (MT5600DSDV only)

✔ For connecting to a sound card, an optional male-to-male stereo patch cord with

1/ 8-inch mini plugs (MT5600DSDV only)

If you are new to computers, see Chapter 3, “Features,” for more information about

the required equipment.

Sa fe t y Wa r n in g s

• Use this product only with UL- and CUL-listed computers.

• To reduce the risk of fire, use only 26 AWG or larger telephone wiring.

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 during an electrical storm; there is a risk of electrical

shock from lightning.

Do not use a telephone in the vicinity of a gas leak.

•

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

2 Installation

St e p 1: M o u n t t h e Fe e t

The modem comes with a strip of self-adhesive plastic feet, which you can optional-

ly mount on the bottom of the modem. To install the feet, simply peel them from

their paper strip and press them into the recesses on the bottom of the modem.

Figure 2-1. Mounting the feet.

St e p 2: Ch a n ge t h e Sp ea ke r J u m p e r (MT5600DSDV on ly)

This step is required only if you intend to connect a monophonic speaker to your mo-

dem. (This step is not required for stereo speakers or for the included headset.) If

you do not intend to connect a monophonic speaker to your modem, skip to Step 3.

Warning: The following procedure must be performed by authorized service

personnel.

Caution: The circuit board can be harmed by static electricity. Before you open the

case, touch a grounded object, such as the metal chassis of your computer, 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.

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 together. 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.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

2 Installation

J10 Speaker Mode

Closed: stereo (default)

Open: mono

J10

Figure 2-2. Location of speaker jumper. (MT5600DSDV only)

Changing the Speaker Jumper

The speaker jumper (J10) is behind the internal speaker near the external speaker

jack (see Figure 2-2).

• To use the MultiModemDSVD with a monophonic external speaker, remove the

jumper plug from the J10 jumper pins. You can store it by placing it on one

jumper pin.

• To use the MultiModemDSVD with a stereo speaker or sound card, place the

jumper plug on both pins of the J10 jumper. This is the factory default position.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

2 Installation

St e p 3: Co n n ec t t h e M o d e m t o Yo u r Sys t e m

Placing the modem in a convenient location, connect it to your computer’s serial

port, to the telephone line, to AC power, and, optionally, to your telephone. For

voice operations, connect it to the supplied headset or, optionally, to a microphone

and a speaker or sound card.

Note: Do not turn on the modem until you have made all the connections.

MT5600DSDV only

PWR

RS232

PHONE LINE

Figure 2-3. Modem connections.

RS232 Connection

Plug one end of the serial cable into the RS232 connector on the modem, and the oth-

er 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.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

2 Installation

Note: The Federal Communications Commission (FCC), Industry Canada, and other

government agencies may impose certain restrictions on equipment connected to

public telephone systems. For more information, see Appendix A.

Phone Connection

For voice-only calls, you can optionally plug a telephone into the modem’s PHONE

jack.

Microphone Connection (MT5600DSDV only)

Plug the microphone plug of the supplied headset into the MIC jack on the side of

the modem. Optionally, plug an unamplified microphone into the MIC jack. The mi-

crophone should have a 1/ 8-inch mini plug.

Speaker Connection (MT5600DSDV only)

Plug the speaker plug of the supplied headset into the SPKR jack on the side of the

modem. Optionally, 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 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 6,

“Solving Problems.”

Surge Protectors and Lightning

Because of power surges and other transient voltages on power and telephone lines,

we recommend that you plug the modem into a surge protector rather than directly

into a wall outlet, preferably a surge protector that provides protection against elec-

trical spikes on the telephone line as well as on the power line. Please note, however,

that not even a surge protector can guard against damage from a nearby lightning

strike.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

2 Installation

St e p 4 : In s t a ll t h e M o d e m Dr ive r

If you use Windows 98, Windows Me, Windows NT 4.0, or Windows 2000, you must

install the modem driver, which is installed using the Windows Plug and Play feature.

Follow the four-step procedure below. The modem driver is used by Windows to con-

trol the modem.

Installing the Modem Driver

1. Make sure your modem is connected properly, and then turn on your computer.

Windows should detect your new modem and open the Install New Modem

wizard.

Note: If Windows cannot find a modem, your modem may not have power, it

may be plugged into the wrong connector on your computer, or the serial cable

may be faulty. See “None of the LEDs Light When the Modem Is Turned On” and

“The Modem Does Not Respond to Commands” in Chapter 5, “Solving Problems.”

2. Insert the MultiModemDSVD system CD into your CD-ROM drive, and then

click OK.

3. Windows installs and configures the modem.

4. Click Finish to exit.

For Windows NT, the Install New Modem wizard presents one additional prompt

before Step 2. At this point, select Don’t detect my modem; I will select it from a

list, and then click Next. A dialog box with a list of manufacturers and a list of

modem models appears. Select your modem. Continue with Step 2 above.

Removing Your Old Modem Driver

When your new modem replaces another modem, the old modem driver remains in

Windows after you install the new modem, and the old modem is still selected in

HyperTerminal and other Windows applications. Though you can change the appli-

cation 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 then click Control Panel.

2. Double-click the Modems icon to open the Modems Properties dialog box.

3. In the list box, select the old modem.

4. Click Remove, and then click Close.

5. The next time you dial a HyperTerminal connection, it will select your new mo-

dem and ask you to confirm the selection.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

2 Installation

St e p 5: In s t a ll Ph o n e To o ls So ft w a r e

Multi-Tech includes PhoneTools communications software with your modem.

However, the modem will work with most data communications software. To install

PhoneTools, insert the MultiModemDSVD system CD into your CD-ROM drive;

click the PhoneTools icon. You will be asked to choose your language. The software

will then automatically load onto your PC.

Communication programs designed for Windows 98/ Me and Windows NT/ 2000

normally do not need to be manually configured, since they use the Plug and Play

configuration supplied by the Windows modem driver. Though each

communication program is different, the following procedure should work with most

of them.

Multi-Tech Systems, Inc.

Ch a p t e r 3 - O p e r a t io n

MultiModemDSVD User Guide

3 Operation

In t r o d u ct io n

Like any modem, your MultiModemDSVD operates only under the control of a

communication program, such as the one included with the modem. It also operates

under other general-purpose data communication programs, such as Windows

Terminal and HyperTerminal. For information on how to use the modem with the

communication program of your choice, please refer to the program’s

documentation.

Unlike other modems, with the MultiModemDSVD you can also simultaneously

send voice and data over a single phone line or, using third-party white-board

software, work on a document with someone at another location.

Fr o n t Pa n e l

Figure 3-1. Front panel

The MultiModemDSVD 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 transmitting data to

another modem. The state of the LED matches the TD circuit on pin 2 of the

RS-232C/ V.24 interface.

Receive Data. The RD LED flashes when the modem is receiving data from

another modem. The state of the LED matches that of the RD circuit on pin 3 of

the RS-232C/ V.24 interface.

Carrier Detect. The CD LED lights when the modem detects a 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 (56,000–28,000 bps). The 56 LED lights whenever the modem

nects to an ISP server in K56flex or V.90 mode. The actual connection speed

depends on server capabilities and line conditions.

con

33 V.34 Mode (33,600–16,800 bps). The 33 LED lights whenever the modem

nects in V.34 mode.

con

V.32bis Mode (14,400 bps–). The 14 LED lights whenever the modem connects

in V.32bis mode.

Note: Although the modem can connect at lower than V.32bis speeds, no speed

indicator lights during the connection.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

3 Operation

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.

Terminal Ready. The TR LED lights when a datacomm program initializes the

modem. It means the modem is ready for an outgoing or incoming call. It goes

off when the datacomm program disconnects the COM port. When it goes off, a

connected modem will disconnect. The state of the TR LED matches that of the

DTR circuit on pin 20 of the RS-232C/ V.24 interface.

Error Correction (V.42). The EC LED lights continuously when the modem is in

V.42 error correction mode, and blinks when compression is activated.

Fax. The FX LED lights when the modem is in fax mode.

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. 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.

Co n f ig u r in g t h e M o d e m

Your modem normally is configured either through Windows or through the

communication program you are using. The default settings work best for most

purposes. See “Step 5: Install and Configure Your Software” in Chapter 2 for help in

setting up your communication program.

You can also configure your modem directly by typing AT commands in the

terminal window of a communication program. See Chapter 4 for descriptions of the

modem’s AT commands.

Co n n ec t in g t o t h e In t e r n e t

Your Multi-Tech modem is your gateway to the Internet and the World Wide Web.

To access the Internet and Web via your modem, you must establish a dial-up

account with an Internet service provider (ISP). To locate an ISP near you, look in a

local directory or computer publication. Your ISP should provide you with the

following information:

• User name (also called user ID)

• Password

• Access number (the number you call to connect to the server)

• Host name and/ or domain name

• Domain Name Server (DNS) server address

If, besides the Web, you use the Internet for e-mail and newsgroups, your ISP should

also provide you with the following information:

• E-mail or POP mail address

• POP server address

• Mail or SMTP address

• News or NNT server address

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

3 Operation

Dia l-Up Ne t w o r k in g

Whether you use the Internet for e-mail or for browsing the Web, to connect to it

through your modem, you must first set up a remote-node client program. The one

in Windows 95, 98, Me, NT 4.0, and 2000 is called Dial-Up Networking. Dial-Up

Networking establishes your connection to the ISP’s server, which is the shared com-

puter that manages calls from clients (your computer) to the Internet. Most, if not all,

Windows browsers start Dial-Up Networking automatically when you open them.

Dial-Up Networking in Windows 95/98

To install and run Dial-Up Networking in Windows 95 or 98

Install a NetWare client or Client for Microsoft Networks on the client computer.

Microsoft Client for Netware Networks, Microsoft Client for Microsoft Networks,

and two Novell Netware clients are included with Windows 95/ 98.

1. Insert the Windows compact disc into the CD-ROM drive.

2. In Windows, click the Start button, and then select Settings, Control Panel, and

Add/ Remove Programs.

3. Click the Windows Setup tab.

4. Check Communications in the Components list.

5. Click the Details button.

6. Check Dial-up Networking in the Components list.

7. Click OK. Dial-Up Networking is installed from the Windows compact disc.

8. When the installation is complete, reboot the computer.

To create a connection entry

1. Double-click the My Computer icon.

2. Double-click the Dial-Up Networking icon.

3. Double-click the Make New Connection icon, and follow the directions in the

wizard to create a connection entry.

To dial your Internet access provider

1. Double-click the My Computer icon.

2. Double-click the Dial-Up Networking icon.

3. Double-click the icon with your ISP’s name.

4. Type your name and password if they are not already entered.

5. Click Connect.

6. Follow the instructions provided by your ISP for browsing the the Internet,

reading e-mail, and accessing information.

For further information on Dial-Up Networking or Microsoft Client for NetWare

Networks, see Windows Help.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

3 Operation

Dial-Up Networking in Windows Me

To install Dial-Up Networking

Dial-Up Networking is automatically installed with Windows Me.

To create a connection entry

1. Click Start, point to Programs, point to Accessories, point to Communications,

and then click Internet Connection Wizard.

2. Click I want to sign up for a new Internet account, and then click Next.

3. Follow the instructions for setting up your dial-up properties and detecting your

modem.

To dial your Internet access provider

1. Click Start, point to Settings, and then click Control Panel.

2. Double-click the Dial-Up Networking icon.

3. Double-click the icon with your ISP’s name.

4. Follow the instructions provided by your ISP for browsing the the Internet,

reading e-mail, and accessing information.

For further information on Dial-Up Networking, see Windows Me Help.

Dial-Up Networking in Windows NT 4.0

To install Dial-Up Networking

1. Double-click the My Computer icon, and then double-click the Dial-Up Net-

working icon. If Dial-Up Networking is not installed, you will see an Install

button in the Dial-Up Networking dialog box.

2. Insert the Windows NT 4.0 compact disc into the CD-ROM drive.

3. Click Install in the Dial-Up Networking dialog box.

4. In the Add RAS Device dialog box, choose the modem to use with Dial-Up Net-

working, and then click OK.

5. In the Remote Access Setup dialog box, click Configure.

6. In the Configure Port Usage dialog box, click Dial out only, and then click OK.

7. In the Remote Access Setup dialog box, click Network.

8. In the Network Configuration dialog box, make sure that only TCP/IP is select-

ed, and then click OK.

9. If there is a network interface card that does not have TCP/ IP bound to it, the

Microsoft TCP/ IP Properties window appears. Click Cancel to close the window.

10. Click Continue, and then click Restart to finish the installation.

11. When the installation is complete, reboot the computer.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

3 Operation

To create a connection entry

1. Double-click the My Computer icon, and then double-click the Dial-Up Net-

working icon.

2. In the Dial-Up Networking dialog box, click the New button.

3. In the New Phonebook Entry wizard, follow the directions to create a connec-

tion entry.

To dial your Internet access provider

1. Double-click the My Computer icon.

2. Double-click the Dial-Up Networking icon.

3. Click the connection in Phonebook entry to dial.

4. Click Dial.

5. Follow the instructions provided by your ISP for browsing the the Internet,

reading e-mail, and accessing information.

For further information on Dial-Up Networking, see Windows NT Help.

Dial-Up Networking in Windows 2000

To install Dial-Up Networking

Dial-Up Networking is automatically installed with Windows 2000.

To create a connection entry

1. Select Start | Settings | Network and Dial-up Connections.

2. Double-click Make New Connection, and then click Next.

3. Click Dial-up to the Internet, click Next, and then follow the instructions in the

Network Connection wizard.

To dial your Internet access provider

1. Select Start | Settings | Network and Dial-up Connections.

2. Double-click the icon with your ISP’s name.

3. Follow the instructions provided by your ISP for browsing the the Internet,

reading e-mail, and accessing information.

For further information on Dial-Up Networking, see Windows 2000 Help.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

3 Operation

Fa x O p e r a t io n

Using the PhoneTools program included with your modem, you can use your modem to

send and receive faxes directly from your computer. The following procedure uses print

capture, which enables you to fax a document directly from the Windows applica-

tion in which you created it without opening PhoneTools.

1. Create a document in a Windows application, such as a word processor, graphic

editor, or spreadsheet. To fax the document, keep the application and the docu-

ment open and select the Print command from the File menu.

2. Select CAPTURE FAX BVRP as the printer driver, and then click OK. The Send

Fax wizard appears.

3. In the Recipient section, type the required information or extract it from the

Phone Book by clicking

4. In the Template section, optionally select a cover page and type a cover message.

5. Select the document to be sent. The default file when sending from within a Win-

dows application is Capture.dgr.

6. Select the date and time to send the document, if you do not want to send it

immediately.

7. Click Finish to start the transmission.

Vo ice O p e r a t io n

Operation in DSVD mode allows data transfer and voice conversation to occur si-

multaneously during a data connection. On a DSVD call, a headset or microphone

and speaker can be used as the voice interface. Both local and remote modems must

have compatible DSVD technology to support the DSVD function. DSVD can be

used by running a communications application that supports DSVD. Follow the ap-

plication instructions. DSVD can also be controlled manually issuing AT commands

to the modem as described in the following sections.

To Originate a Voice Call in Speakerphone Mode

1. In the terminal window of your communications application, type AT and press

ENTER. The modem will respond with OK.

2. Type AT&F and press E^NTERto reset the modem to its default configuration.

3. Type AT#CLS=8#VRN=0#VLS=6 and press E^NTERto initialize the modem for

speakerphone mode.

4. To dial, type ATDTnnnnnnn and press ENTER, where nnnnnnn is the phone num-

ber of a remote party. The modem will report VCON at the completion of dialing

to indicate the speakerphone is on.

5. To hang up, type +++ATH and press E^NTER.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

3 Operation

To Answer a Voice Call in Speakerphone Mode

1. In the terminal window of your communications application, type AT and press

E^NTER. The modem will respond with OK.

2. Type AT&F and press E^NTERto reset the modem to its default configuration.

3. Type AT#CLS=8#VRN=0#VLS=6S0=0 and press ENTER to initialize the modem

for speakerphone mode.

4. To answer a call in speakerphone mode upon receipt of a RING message, type

ATA and press E^NTER. The modem will report VCON to indicate the speaker-

phone is on.

5. To hang up, type ATH and press E^NTER.

To Originate a DSVD Call Using the Headset (MT5600DSDV only)

1. In the terminal window of your communications application, type AT and press

E^NTER. The modem will respond with OK.

2. Type AT&F and press E^NTERto reset the modem to its default configuration.

3. Type AT-SMS=1#VLS=5 and press E^NTERto enable DSVD mode using the head-

set.

4. To dial, type ATDTnnnnnnn and press E^NTER, where nnnnnnn is the phone num-

ber of a remote modem.

5. You will hear some high pitched tones, then a static-like sound after the remote

modem picks up your call. You will see a CONNECT response on your terminal.

You can then send data to the remote modem and talk to the remote user by

speaking into the microphone

6. To hang up, type +++ATH and press E^NTER.

Note: If DSVD is enabled, the modems will not connect if the V.34 connect rate is

below 12000 bps. The voice link is not maintained in data mode, so if +++ is

typed and the user goes back to data mode, a simulated busy is played to both

modems to tell the users to place their handsets on hook. If you get an ERROR

message when dialing or answering a call, check to make sure the lines are not in

the wrong jacks. A DSVD data connection is terminated by dropping DTR (if en-

abled by &D2) or by issuing +++ATH.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

3 Operation

To Answer a DSVD Call Using the Headset (MT5600DSDV only)

1. In the terminal window of your communications application, type AT and press

E^NTER. The modem will respond with OK.

2. Type AT&F and press E^NTERto reset the modem to its default configuration.

3. Type AT-SMS=1#VLS=5 and press ENTER to enable DSVD mode using the headset.

4. When the modem responds by displaying RING on the screen, type ATA and

press E^NTERto answer the call.

5. You will hear some high pitched tones, then a static-like sound after the remote

modem picks up your call. You will see a CONNECT response on your terminal.

You can then send data to the remote modem and talk to the remote user by

speaking into the microphone

6. To hang up, type +++ATH and press E^NTER.

Multi-Tech Systems, Inc.

Ch a p t e r 4 - AT

Co m m a n d s

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

AT Co m m a n d s

AT commands are used to control the operation of your modem. They are so called

because each command must be preceded by the characters AT to get the ATtention

of the modem.

AT commands can be issued only when the modem is in command mode or online

command mode. The modem is in command mode whenever it is not connected to

another modem. The modem is in data mode whenever it is connected to another mo-

dem and ready to exchange data. Online command mode is a temporary state in which

you can issue commands to the modem while connected to another modem. To put

the modem into online command mode from data mode, you must issue an 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 Trio communi-

cations program included with your modem. You can issue commands to the mo-

dem either directly, by typing them in the terminal window of the communications

program, or indirectly, by configuring the operating system or communications pro-

gram to send the commands automatically. Fortunately, communications programs

make daily operation of modems effortless by hiding the commands from the user.

Most users, therefore, need to use AT commands only when reconfiguring the mo-

dem, e.g., to turn autoanswer on or off.

The format for entering an AT command is ATXn, where X is the command and n is

the 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.

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 CONNECT messages that the modem sends to

the computer when it is connecting to another modem. For a table of valid result

codes, see “Result Codes” at the end of this chapter.

You can issue several commands in one line, in what is called a command string. The

command string begins with AT and ends when you press ENTER. Spaces to sepa-

rate 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 another modem.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

AT Co m m a n d Su m m a r y

Command:

Values:

Attention Code

n/ a

Description:

The attention code precedes all command lines except A/ and

the escape sequence.

Command:

Values:

E^NTERKey

n/ a

Description:

Press the E^NTERor RETURN key to execute most commands.

Command:

Values:

Answer

n/ a

Description:

Answers an incoming call before the final ring.

Command:

Values:

Repeat Last Command

n/ a

Description:

Repeats the last command string. Do not precede this com-

mand with AT. Do not press E^NTERto execute.

Command:

Values:

Communication Standard Setting

n = 0 or 1

Default:

Description: B0

Selects ITU-T V.22 mode when the modem is at 300 or 1200 bps.

Selects Bell 212A when the modem is at 300 or 1200 bps.

Command:

Values:

Carrier Control

n = 1

Default:

Description: C0

Transmit carrier always off. (Not supported.)

Normal transmit carrier switching (included for backward

compatibility with some software).

Command:

Values:

Default:

Dial

s = dial string (phone number and dial modifiers)

none

Description:

Dials telephone number s, where s may up to 40 characters

long and include the following dial string modifiers.

0–9 Digits 0 through 9

The “star” digit (tone dialing only)

The “pound” digit (tone dialing only)

A–D A, B, C, and D tone digits. Country specific; some countries

may prohibit these digits.

Redial last number. (Must be placed immediately after ATD.)

Select pulse-dialing until a T is encountered. Affects current

and subsequent dialing.

Select tone-dialing until a P is encountered. Affects current

and subsequent dialing.

W Wait for a new dial tone before continuing to dial. (X2 or X4

must be selected.)

Pause during dialing for time set in register S8.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

;

Return to command mode after dialing. (Place at end of dial

string.)

Hook flash. Causes the modem to go on-hook for the time

specified in S29, then off-hook again .

@ Wait for silence. Causes the modem to wait for 5 seconds of

silence before processing the next part of the command. If

silence is not detected within the time set in register S7, the

modem returns a NO ANSWER or BUSY code.

Toggle data calling tone on or off. Applies only to current

dialing attempt.

& Detect credit card “bong” tone. If the tone is not detected

within the time specified by S7 (US models), the modem

aborts the rest of the sequence and hangs up. The character

should follow the phone number and precede the user’s call

card number, e.g., ATDT1028806127853500&123456789.

Command:

Values:

DS=y Dial Stored Telephone Number

n = 0–3

Default:

none

Description:

Dial a number previously stored in directory number y by the

&Zy=x command. Example: ATDS=3.

Command:

Values:

Echo Command Mode Characters

n = 0 or 1

Default:

Description: E0

Do not echo keyboard input to the terminal.

Do echo keyboard input to the terminal.

Command:

Values:

Hook Control

n = 0 or 1

Default:

Description: H0

Go on-hook (hang up) and terminate any &T test that is in

progress.

Go off-hook (make the phone line busy) and enter command mode.

Command:

Values:

Information Request

n = 0–6

Default:

None

Description: I0

Display the product code. Example: MT5600DSVD.

Calculate the ROM checksum and display the least significant

byte in decimal format.

Calculate the ROM checksum and compare it to the prestored

checksum, displaying OK if they match, or ERROR if they do not.

Display the controller firmware version (F), the basic model (V90),

the application code (A), and the interface type code (I) in the for-

mat VF.FFF-V90_AI. The application codes are D for desktop and

L for low power (PCMCIA). The interface codes are S for serial

and P for parallel. Example: V2.210-V90_DS

Display the OEM-defined identifier string in either binary or

ASCII format.

Display the country code. Example: 022.

Display the modem data pump model and internal code version.

Example: RCV56DPF-PLL L8571A Rev 29.00/29.00.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Command:

Values:

Monitor Speaker Volume

n = 0, 1, 2, or 3

Default:

Description: L0

Select low volume.

Select medium volume.

Select high volume.

Note: Use the M command to turn the speaker on or off.

Command:

Value:

Display Legacy Parameters

Default:

None

Description:

Displays the current values for the error correction, flow

control, data compression, and serial port speed commands.

Example:

atl5

&E2 &E3 &E15 $SB115200

Note: Use the &V command to display the other parameters.

Command:

Values:

Monitor Speaker Mode

n = 0, 1, 2, or 3

Default:

Description: M0

Speaker is always off.

Speaker is on until the carrier signal is detected.

Speaker is always on when the modem is off-hook.

Speaker is off when receiving carrier and during dialing, but

on during answering.

Command:

Values:

Modulation Handshake

n = 0 or 1

Default:

Description: N0

Disables automode. The modem attempts a handshake at the

speed set by S37 or, if S37=0, at the most recently sensed serial

port speed.

Enables automode. The modem attempts a handshake at the

speed set by S37 or, if S37=0, at the highest possible speed.

During the handshake, fallback to a lower speed can occur.

Note: Setting the N command automatically sets the <automode>

parameter of the +MS command. N and S37 are provided only

for compatibility with existing software. +MS is the recom-

mended command.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Command:

Values:

Return Online to Data Mode

0 or 1

Default:

None

Description: O0

Exit online command mode and return to online data mode

without a retrain. Normally used after a +++ escape (see

+++AT<CR> escape sequence).

Exit online command mode and return to online data mode

after a retrain.

Command:

Values:

Pulse Dialing

P, T

Default:

Description:

Forces pulse (non-touch-tone) dialing until a T command or

dial modifier is received.

Command:

Values:

Result Codes Enable/Disable

n = 0 or 1

Default:

Description: Q0

Enable result codes.

Disable result codes.

Command:

Values:

Select Register

r = S-register number

Default:

None

Description:

Selects register Sr as the last register accessed. E.g., S0. The

command AT? can then be used to read the register, and the

command AT=n can then be used to set the register to value n.

Command:

Values:

Sr=n Set Register Value

r = S-register number; n varies

Default:

None

Description:

Set value of register Sr to n, where n is entered in decimal for-

mat. E.g., S0=1. If the short form AT=n is used, the value is

written to the last accessed S-register.

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 for-

mat. E.g., S2? gives the response 043. If the short form AT? is

used, the last accessed S-register is read.

Command:

Values:

Tone Dialing

P, T

Default:

Description:

Forces DTMF (touch-tone) dialing until a P command or P dial

modifier is received.

Command:

Values:

Result Code Format

n = 0 or 1

Default:

Description: V0

Displays result codes as digits (terse response).

Displays result codes as words (verbose response).

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Command:

Values:

Wn Connect Message Control

n = 0, 1, or 2

Default:

Description: W0 The CONNECT result code reports the serial port speed only.

W1 The CONNECT result code reports the line speed, the error

correction protocol, and the serial port speed, respectively.

W2 The CONNECT result code reports the line speed only.

Note: See also the \ V command

Command:

Values:

Result Code Selection

n = 0–4

Default:

Description:

This command selects which subset of the result messages will

be used by the modem to inform the computer of the results of

commands.

Sends OK, CONNECT, RING, NO CARRIER, ERROR and NO

ANSWER; does not look for dial tone or busy signal.

Sends X0 messages and connect speed; does not look for dial

tone or busy signal.

Sends X1 messages with NO DIALTONE; does not look for

busy signal.

Sends X1 messages with BUSY; does not look for dial tone.

Sends all messages, including NO DIALTONE and BUSY.

Note: If the modem is in fax mode, the only message sent to

indicate a connection is CONNECT without a speed indication.

See also the \ V command.

Command:

Values:

Long Space Disconnect

n = 0 or 1

Default:

Description: Y0

Disable sending or responding to long space break signal on

disconnect.

Enables long space disconnect. In non-error correction mode,

the modem sends a long space of four seconds prior to going

on-hook. In non-error correction mode, the modem responds

to the receipt of a long space (i.e., a break signal greater than

1.6 seconds) by going on-hook.

Command:

Values:

Modem Reset

n = 0 or 1

Default:

None

Description:

The modem performs a soft reset and restores (recalls) the con-

figuration profile according to the parameter supplied. If no

parameter is specified, zero is assumed.

Reset modem to profile saved by the last &W command (pro-

file 0).

Reset modem and restore stored profile 1.

Note: See also the &F and &W commands.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Command:

Values:

&Cn Data Carrier Detect (DCD) Control

n = 0 or 1

Default:

Description: &C0 Forces the DCD circuit to always be high.

&C1 DCD goes high when the remote modem’s carrier signal is de-

tected, and goes low when the carrier signal is not detected.

Command:

Values:

&Dn Data Terminal Ready (DTR) Control

n = 0, 1, 2, or 3

Default:

Description:

This command interprets the high to low transition of the DTR

signal from the computer according to the supplied parameter.

The action taken depends on the current &Q setting.

&D0 &Q0, &Q5, &Q6: DTR is ignored (assumed high). Allows op-

eration with computers that do not provide DTR.

&D1 &Q0, &Q5, &Q6: DTR drop is interpreted by the modem as if

the asynchronous escape sequence had been entered. The mo-

dem returns to asynchronous command state without discon-

necting.

&D2 &Q0–&Q6: DTR drop causes the modem to hang up. Autoan-

swer is inhibited.

&D3 &Q0, &Q5, &Q6: DTR drop causes the modem to perform a

soft reset as if the Z command were received. The &Y setting de-

termines which profile is loaded.

&Q5 or &Q6 and +FCLASS=1 or +FCLASS=2: Same as for &Q0.

Note: If &D1, &D2, or &D3 is set, the modem will not dial

without a DTR drop.

Command:

Values:

&En V.42 Error Correction Modes

n = 0, 1, or 2

Default:

Description: &E0 V.42 non-error correction mode (V.42 disabled).

&E1 V.42 auto-reliable mode.

&E2 V.42 reliable mode (V.42 enabled).

Command:

Values:

&En Modem-Initiated Flow Control

n = 3, 4, or 5

Default:

Description: &E3 Flow control disabled.

&E4 CTS/ RTS hardware flow control.

&E5 XON/ XOFF software flow control.

Note: See also the L5 and &K commands.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Command:

Values:

&En V.42bis Data Compression

n = 14 or 15

Default:

Description: &E14 V.42bis data compression disabled.

&E15 V.42bis data compression enabled.

Note: This command controls only V.42bis data compression,

whereas the %C command controls both V.42bis and MNP-5

data compression. The command in effect is the one last en-

tered. See also the L5 command.

Command:

Values:

&Fn Load Factory Settings

n = 0 or 1

Default:

None

Description: &F0 Load factory configuration 0.

&F1 Load factory configuration 1.

Note: See also the Z, L5, and &V commands.

Command:

Values:

&Gn V.22bis Guard Tone Control

n = 0, 1, or 2

Default:

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, and

may not be permitted in some countries.

Command:

Values:

&Jn Telephone Jack Control

n = 0 or 1

Default:

None

Description: &J0 NA

&J1 NA

Note: This command is included only for backwards compati-

bility. It performs no function except to load the S-register. The

parameter value, if valid, is written to S21 bit 1.

Command:

Values:

&Kn Flow Control Selection

n = 0, 3, 4, 5, or 6

Defaults:

3 (data modem mode)

6 (fax modem and voice modes)

Description: &K0 Disables flow control.

&K3 Enables CTS/ RTS hardware flow control.

&K4 Enables XON/ XOFF software flow control.

&K5 Enables transparent XON/ XOFF flow control.

&K6 Enables both RTS/ CTS and XON/ XOFF flow control.

Note: See also the &E command

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Command:

Values:

&Mn Communications Mode

n = 0

Default:

Description:

This command determines the DTR operating mode. The mo-

dem treats the &M command as a subset of the &Q command.

&M0 Selects direct asynchronous operation. Note that the command

sequence &M0\ N0 selects normal buffered mode, but the

command sequence \ N0&M0 selects direct mode. This is be-

cause the \ N0 command is analogous to the &Q6 command.

Command:

Values:

Default:

&Pn Pulse Dial Make/Break Ratio

n = 0

Description: &P0 Selects a make/ break dial ratio of 39:61 at 10 pulses per sec-

ond.

Command:

Values:

&Qn Asynchronous Communications Mode

n = 0, 5, 6

Default:

Description:

This command is an extension of the &M command, and is used

to control which connection modes are permitted. It is used in

conjunction with S36 and S48. (See also the \ N command.)

&Q0 Selects direct asynchronous operation. See &M0.

&Q5 The modem will try to negotiate an error-corrected link. The

modem can be configured using S36 to determine whether a

failure will result in the modem disconnecting or falling back

to a non-error-correction connection. See also \ N3.

&Q6 Selects asynchronous operation with speed buffering and no

error correction. Same as \ N0.

Command:

Values:

&Sn Data Set Ready (DSR) Control

n = 0 or 1

Default:

Description: &S0 Force DSR high (on) at all times.

&S1 Let DSR go high only during a connection.

Command:

Values:

&Tn V.54 Test Commands

n = 0, 1, 3, 4, 5, 6, 7, or 8

Default:

None

Description:

The modem can perform selected test and diagnostic functions.

A test can be run only when the modem is in asynchronous

operation in non-error-correction mode (normal or direct mode).

For tests 3, 6, and 7, a connection between the two modems

must first be established. To terminate a test in progress, the

escape sequence (+++) must be entered first, except for param-

eters 7 and 8. If S18 is non-zero, a test terminates automatically

after the time specified by S18 and displays the OK message.

&T0 Abort. Stop any test in progress.

&T1 Start local analog loopback, V.54 Loop 3. If a connection exists

when this command is issued, the modem hangs up. The CON-

NECT XXXX message is displayed upon the start of the test.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

&T3 Start local digital loopback, V.54 Loop 2. If no connection ex-

ists, ERROR is returned.

&T4 Enables acknowledgment for remote digital loopback request.

&T5 Ignores acknowledgment for remote digital loopback request.

&T6 Requests a remote digital loopback, V.54 Loop 2, without self-

test. If no connection exists, ERROR is returned. The CON-

NECT XXXX message is displayed upon the start of the test.

&T7 Requests a remote digital loopback, V.54 Loop 2, with self test.

(In self test, a test pattern is looped back and checked by the

modem..) If no connection exists, ERROR is returned. When

the test is terminated, the number of detected errors is re-

ported to the computer.

&T8 Starts local analog loopback, V.54 Loop 3, with self test. If a

connection exists, the modem hangs up before the test begins.

When the test is terminated, the number of detected errors is

reported to the computer.

Command:

Values:

&V0 Display Current Configuration

Default:

None

Description:

Displays the current (active) configuration.

Note: See also the L5 command.

Command:

Values:

&V1 Display Last Connection Statistics

Default:

None

Description:

Displays statistics for the last connection.

Command:

Values:

&Wn Store Current Configuration

n = 0 or 1

Default:

None

Description: &W0 Stores current modem settings in nonvolatile memory as Profile 0.

Profile 0 is loaded instead of the factory defaults at power-on

(if &Y0 is set) and by the ATZ command.

&W1 Stores current modem settings in nonvolatile memory as Profile 1.

Profile 1 is loaded instead of the factory defaults at power-on

(if &Y1 is set) and by the ATZ1 command.

Note: See also the Z, &F, and &Y commands.

Command:

Values:

&Yn Select Profile for Hard Reset

n = 0 or 1

Default:

None

Description: &Y0 Select profile 0 to be loaded on power-up.

&Y1 Select profile 1 to be loaded on power-up.

Note: See also the &W and Z commands.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Command: &Zy=x Store Telephone Number

Values:

y = 0–3

x = Dialing command

Default:

None

Description:

Stores telephone dial string x in memory location y. Each tele-

phone number dial string can contain up to 34 digits. Dial the

stored number using the command ATDS=y.

Note: DTR dialing uses the number stored in memory location 0.

Command:

Values:

%Cn Data Compression Control

n = 0, 1, 2, or 3

Default:

Description:

Enables or disables data compression negotiation. The modem

can only perform data compression on an error-corrected link.

%C0 Disables data compression.

%C1 Enables MNP 5 data compression negotiation.

%C2 Enables V.42bis data compression negotiation.

%C3 Enables both V.42bis and MNP 5 data compression negotiation.

Note: This command controls both V.42bis and MNP-5 data

compression, whereas the &E14 and &E15 commands control

only V.42bis data compression. The command in effect is the

one last entered.

Command:

Values:

%En Line Quality Monitor

n = 0, 1, or 2

Default:

Description:

Controls whether or not the modem will automatically moni-

tor the line quality and request a retrain (%E1) or fall back to a

lower speed when line quality is insufficient and fall forward

to a faster speed when line quality is sufficient (%E2).

%E0 Disable line quality monitor and auto-retrain.

%E1 Enable line quality monitor and auto-retrain.

%E2 Enable line quality monitor and fallback/ fall forward.

Command:

Values:

Default:

%L Line Signal Level

None

Description: %L

Returns a value that indicates the received signal level. The

value returned is a direct indication (DAA-dependent) of the

receive level at the MDP, not at the telephone line connector.

For example, 009 = -9 dBm, 043 = -43 dBm, and so on.

Command:

Values:

Default:

%Q Line Signal Quality

None

Description: %Q Reports the line signal quality (DAA-dependent) as a three-

digit number. Returns the higher order byte of the EQM value.

Based on the EQM value, retrain or fallback/ fall forward may

be initiated if enabled by %E1 or %E2.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Command:

Values:

%U PCM Code Selection

n = 0 or 1

Default:

Description:

Specifies the PCM code type for 56K modulation. Note, how-

ever, that the modem automatically selects the code type if the

server sends the proper ID.

%U0 Selects µ-Law coding—used in North America and Japan.

%U1 Selects A-Law coding—used outside North America and Japan.

Note: See also the +MS= command.

Command:

Values:

\An Maximum MNP Block Size

n = 0, 1, 2, or 3

Default:

Description: \ A0 64-character maximum block size.

\ A1 128-character maximum block size.

\ A2 192-character maximum block size.

\ A3 256-character maximum block size.

Command:

Values:

\Bn Transmit Break

n = 0–9 in 100 ms units

Default:

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.

Command:

Values:

\Kn Break Control

n = 0–5

Default:

Description:

Controls the response of the modem to a break received from

the computer, the remote modem, or the \ B command. The

response is different for each of three different states.

Data mode. The modem receives the break from the computer:

\ K0 Enter online command mode, no break sent to the remote mo-

dem.

\ K1 Clear data buffers and send break to the remote modem.

\ K2 Same as \ K0.

\ K3 Send break immediately to the remote modem .

\ K4 Same as \ K0.

\ K5 Send break to the remote modem in sequence with the trans-

mitted data.

Data mode. The modem receives the break from the remote

modem during a non-error-corrected connection:

\ K0 Clear data buffers and send break to the computer.

\ K1 Same as \ K0.

\ K2 Send break immediately to the computer.

\ K3 Same as \ K2.

\ K4 Send break to the computer in sequence with the received

data.

\ K5 Same as \ K4.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Online command mode. The modem receives a \ Bn command

from the computer:

\ K0 Clear data buffers and send break to the remote modem.

\ K1 Same as \ K0.

\ K2 Send break immediately to the remote modem.

\ K3 Same as \ K2.

\ K4 Send break to the remote modem in sequence with the trans-

mitted data.

\ K5 Same as \ K4.

Command:

Values:

\Nn Error Correction Mode Selection

n = 0–5

Default:

Description: \ N0 Normal (non-error correction) mode with data buffering.

(Forces &Q6.)

\ N1 Direct mode. Equivalent of &M0 and &Q0 modes. (Forces &Q0.)

\ N2 V.42/ MNP reliable (error-correction) mode. The modem at-

tempts first a V.42 connection and then an MNP connection.

Failure to make a reliable connection results in the modem

hanging up. (Forces &Q5, S36=4, and S48=7.)

\ N3 V.42/ MNP auto-reliable mode. The modem attempts first to

connect in V.42 mode, then in MNP mode, and finally in non-

error-correction mode with data buffering. (Forces &Q5, S36=7,

and S48=7.)

\ N4 V.42 (LAPM) reliable mode.If the modem cannot make a V.42

connection, it disconnects. (Forces &Q5 and S48=0.) Note: The

-K1 command can override the \ N4 command.

\ N5 MNP reliable mode.If the modem cannot make an MNP con-

nection, it disconnects. (Forces &Q5, S36=4, and S48=128.)

Command:

Values:

\Vn Single Line Connect Message

n = 0 or 1

Default:

Description: \ V0 Disables single line connect message. Connect messages are

controlled by the X, W, and S95 settings.

\ V1 Enables single line connect messages in the format: CONNECT

</ Line Speed>/ <Voice and Data>. Overrides the X, W, and S95

commands. Connect messages are displayed in the single line

format subject to the commands V and Q. In non-verbose

mode (V0), single line connect messages are disabled and a

single numeric result code is generated for CONNECT.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Command: +MS= Modulation Selection

Values:

See description.

Default:

See description.

Description:

This extended-format command selects modulation and, op-

tionally, enables or disables automode, specifies the lowest and

highest connection rates, selects µ-Law or A-Law codec type,

and specifies the highest transmit rate using one to five

subparameters.

The command format is

+MS=[mod][,[automode][,[min_RX_rate][,[max_RX_rate][,[x_law]

[,[reserved][,[max_TX_rate]]]]]]]<CR>

Subparameters that are not entered retain their current value.

Commas separate optional subparameters, and should be in-

serted to skip a subparameter. Example: +MS=,0,<CR> disables

automode and keeps all other settings at their current values.

+MS? Reports current options in the format

mod,automode,min_RX_rate,max_RX_rate,x_law,reserved,max_TX_rate.

Example: 56,1,300,56000,0,0,33600.

+MS=? Reports supported options in the format (list of supported mod

values),(list of supported automode values),(list of supported

min_RX_rate values),(list of supported max_RX_rate values),

(list of supported x_law values), (list of supported reserved

values),(list of supported max_TX_rate values).

Example: (0,1,2,3,9,10,11,56,64,69),(0,1),(300-33600),(300-

56000),(0,1),(0,1),(300-33600).

Subparameters

mod A decimal number that specifies the preferred modula-

tion (automode enabled) or the modulation to use in originat-

ing or answering a connection (automode disabled). See the

table on the next page.

automode An optional numeric value that enables or disables

automatic modulation negotiation using V.8 bis/ V.8 or V.32

bis Annex A. The options are:

0 = Disable automode

1 = Enable automode (default)

min_RX_rate An optional number that specifies the lowest

rate at which the modem may establish a receive connection.

The value is decimal coded in units of bps, e.g., 2400 specifies

the lowest rate to be 2400 bps. See “Possible rates” in the mod

table. The default is 300 for 300 bps.

max_RX_rate An optional number that specifies the highest

rate at which the modem may establish a receive connection.

The value is decimal coded in units of bps, e.g., 28800 specifies

the highest rate to be 28800 bps. See “Possible rates” in the mod

table. The default is 56000, for 56000 bps.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

<mod>

Modulation

Possible rates (bps)¹

V.21

300

V.22

1200

V.22bis

V.23

2400 or 1200

1200

V.32

9600 or 4800

V.32bis

V.34

14400, 12000, 9600, 7200, or 4800

33600, 31200, 28800, 26400, 24000, 21600,19200, 16800,

14400, 12000, 9600, 7200, 4800, or 2400

12²

56³

V.90

56000, 54667, 53333, 52000, 50667, 49333, 48000, 46667,

45333, 44000, 42667, 41333. 40000, 38667, 37333, 36000,

34667, 33333, 32000, 30667, 29333, or 28000

K56flex

56000, 54000, 52000, 50000, 48000, 46000, 44000, 42000,

40000, 38000, 36000, 34000, or 32000

Bell 103

Bell212

300

1200

Notes:

1. See optional <automode>, <min_RX_rate>, <max_RX_rate>, and <max_TX_rate>

subparameters.

2. Selects V.90 modulation as first priority. If a V.90 connection cannot be established,

the modem attempts K56flex, V.34, V.32bis, etc. (Default.)

3. Selects K56flex modulation as first priority. If a K56flex connection cannot be

established, the modem attempts V.90, V.34, V.32bis, etc.

x_law An optional number that specifies the PCM code type for 56K

modulation. The options are:

0 = µ-Law—used in North America and Japan (default)

1 = A-Law—used outside North America and Japan

The modem automatically selects A-Law or µ-Law if the server

sends the Conexant ID. Note that the ATZ command restores

the x_law value from NVRAM. You can also manually select

A-Law or µ-Law using the %U command.

reserved Must not be changed from the default value of 0.

max_TX_rate An optional number that specifies the highest

rate at which the modem may establish a transmit connection.

The value is decimal coded in units of bps, e.g., 33600 specifies

the highest rate to be 33600 bps. See “Possible rates” in the mod

table. The default is 33600, for 33600 bps.

Command:

Values:

-Kn MNP Extended Services

n = 0, 1, or 2

Default:

Description:

Enables or disables conversion of a V.42 LAPM connection to

an MNP 10 connection.

-K0 Disables V.42 LAPM to MNP 10 conversion.

-K1 Enables V.42 LAPM to MNP 10 conversion.

-K2 Enables V.42 LAPM to MNP 10 conversion; inhibits MNP

Extended Services initiation during V.42 LAPM answer mode

detection phase.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Command: -SDR=n Distinctive Ring Control

Values:

0–7

Default:

Description:

This command enables or disables detection and reporting of

distinctive ring. One, two, or three distinctive ring types can be

simultaneously enabled depending upon the value of n. The

detected ring type is reported in the verbose result code by ap-

pending the ring type number to the end of the RING message.

-SDR=0 Disables distinctive ring. Any valid ring detected is reported as

RING.

-SDR=1 Enables distinctive ring type 1.

-SDR=2 Enables distinctive ring type 2.

-SDR=3 Enables distinctive ring types 1 and 2.

-SDR=4 Enables distinctive ring type 3.

-SDR=5 Enables distinctive ring types 1 and 3.

-SDR=6 Enables distinctive ring types 2 and 3.

-SDR=7 Enables distinctive ring types 1, 2, and 3.

The supported ring types and ring cadence detection criteria

are shown in the following table:

Distinctive

ring type

Ring cadence detection criteria

2.0 sec. on, 4.0 sec. off

0.8 sec. on, 0.4 sec. off, 0.8 sec. on, 0.4 sec. off

0.4 sec. on, 0.2 sec. off, 0.4 sec. on, 0.2 sec. off, 0.8 sec. on, 0.4 sec. off

Command:

Values:

**n

Flash Memory Download

n = 0, 1, or 2

Description: **0

Initiate download to flash memory at the last sensed speed

Initiate download to flash memory at 38.4K bps

Initiate download to flash memory at 57.6K bps

**1

**2

Command: #CID=n Caller ID

Values:

n = 0, 1, or 2

Default:

Description:

Enables or disables Caller ID recognition and reporting.

#CID=0 Disables Caller ID.

#CID=1 Enables formatted Caller ID reporting of ICLID SDM (Single

Data Message) and MDM (Multiple Data Message) packets.

#CID=2 Enables unformatted Caller ID reporting of any ICLID packet

received after the first RING cycle, including SDM, MDM, or

call waiting packets.

#CID? Retrieves the current Caller ID mode from the modem.

#CID=? Returns the mode capabilities of the modem in a list with each

element separated by commas.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Command: $SBn Serial Port Baud Rate

Values:

Default:

n = speed in bits per second

57600

Description: $SB300

$SB1200

Set serial port to 300 bps.

Set serial port to 1200 bps.

Set serial port to 2400 bps.

Set serial port to 4800 bps.

Set serial port to 9600 bps.

$SB2400

$SB4800

$SB9600

$SB19200 Set serial port to 19200 bps.

$SB38400 Set serial port to 38400 bps.

$SB57600 Set serial port to 57600 bps.

$SB115200 Set serial port to 115200 bps.

$SB230400 Set serial port to 230400 bps.

Note: See also the L5 command.

Command: +++AT<CR> Escape Sequence

Values:

n/ a

Description:

Puts the modem in command mode (and optionally 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>.

Vo ice Co m m a n d s

The MultiModemDSVD uses DSVD technology to achieve simultaneous voice and

data operation over a telephone line. Establishing a DSVD connection is like estab-

lishing a regular data modem connection. Initiate the call to another DSVD modem

using normal dialing (ATD) and answering (ATA) procedures. The modem can

switch from a regular phone conversation into DSVD mode and back to phone con-

versation. A headset or microphone/ speaker can be used for voice communication

during DSVD mode.

Command: -SMS=n Data/DSVD Mode

Values:

Default:

n = 0, 1, or 3

Description: -SMS=0 Data mode.

-SMS=1 DSVD mode.

-SMS=3 Automatic mode select (data/ DSVD)

Note: DSVD mode can be enabled by either the -SSE=1 or the

-SMS=1 command, and disabled by either -SSE=0 or -SMS=0.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Command: -SSE=n DSVD Enable/Disable

Values:

Default:

n = 0 or 1

Description: -SSE=0 Disable DSVD.

-SSE=1 Enable DSVD.

Note: DSVD mode can be enabled by either the -SSE=1 or the

-SMS=1 command, and disabled by either -SSE=0 or -SMS=0.

Command: #BDR=n Baud Rate Select

Values:

Default:

n = 0–48

Description: #BDR=0 Enables autobaud detection on the serial port interface.

#BDR=n 1<n<48. Sends OK message at current speed, then switches to

the new speed defined by n × 2400 bps unless and until an-

other #BDR= command is received. Autobaud is disabled, and

the character format is maintained at the format most recently

detected.

Command: #CLS=n Data, Fax, or Voice/Audio Select

Values:

Default:

n = 0, 1, 2, or 8

Description: #CLS=0 Data mode: The modem acts like a data modem on subsequent

answer or originate operations.

#CLS=1 Class 1 fax mode: Selects Class 1 fax modem operation.

#CLS=2 Class 2 fax mode: Selects Class 2 fax modem operation.

#CLS=8 Voice/ audio mode: All telephone calls initialized by #CLS=8

result, after successful call progress, in the modem operating in

online voice command mode.

Command: #MDL? Identify Model

Values:

n/ a

Description:

Displays the modem name or model.

Command: #MFR? Identify Manufacturer

Values:

n/ a

Description:

Displays the name of the manufacturer.

Command: #REV? Identify Revision Level

Values:

n/ a

Description:

Displays the revision level of the modem’s firmware.

Command: #VLS=n Voice Line Select

Values:

Default:

n = 5 or 6

Description: #VLS=5 Selects the headset while in #CLS=8 (voice/ audio) mode.

#VLS=6 Select the speakerphone while in #CLS=8 (voice/ audio) mode.

Note: The #VLS= command must be issued prior to establish-

ing a DSVD connection if a voice line other than the default

headset is desired.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

S-Re g is t e r s

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).

Range

Default

Description

1 ring

0, 1–255

Sets the number of rings before the mo-

dem answers. ATS0=0 disables autoan-

swer completely.

1 ring

0–255

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.

decimal 0–127

13 (^M) Sets the ASCII code for the carriage return

character.

10 (^J)

Sets the ASCII code for the line feed char-

acter.

decimal 0–32

33–127

8 (^H)

Sets the ASCII code for the backspace

character. Values greater than 32 disable

backspace.

seconds 2–255

seconds 1–255

Sets the time the modem waits after it goes

off-hook before it begins to dial the tele-

phone number.

Sets the time the modem waits for a carrier

signal before aborting a call. Also sets the

wait for silence time for the @ dial modifi-

er, and the time the modem waits for the

dial tone after encountering W in the dial

string.

seconds 0–255

Sets the length of a pause caused by a

comma character in a dialing command.

100 ms

1–255

Sets the time, in tenths of a second, that

the carrier must be present before the mo-

dem considers it valid.

S10

Sets how long a carrier signal must be lost

before the modem disconnects.

S11

S12

1 ms

50–255

0–255

Sets spacing and duration of dialing tones.

20 ms

Defines the maximum period, in fiftieths

of second, allowed between receipt of the

last character of the three escape character

sequence from the computer and the send-

ing of the OK result code to the computer.

(Escape code guard time).

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Range

Default Description

S18

seconds 0–255

Sets the length of time that the modem con-

ducts an &T test before it returns to the

command mode. If the value is zero, the test

must be terminated from command mode

by issuing an &T0 or H command. When

S18 is non-zero, the modem returns the OK

message upon test termination.

S24

seconds 0–255

Sets the length of time that the modem op-

erates in normal mode with no detected

telephone or serial port activity before en-

tering low-power sleep mode. The timer is

reset upon any serial port or telephone line

activity.

S25

S29

S30

10 ms

0–255

Sets the length of time that the modem ig-

nores DTR while taking the action specified

by &D.

0–255

Sets the length of time that the modem goes

on-hook when it encounters a flash dial

modifier (!) in the dial string.

0, 1–255

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.

S32

S33

S35

decimal 0–255

decimal 0–1

Sets the ASCII code for the XON character.

Sets the ASCII code for the XOFF character.

0 disables, 1 enables the V.25 data calling

tone, which allows remote data/ fax/ voice

discrimination.

S36

decimal 0–7

LAPM Failure Control. Specifies the fall-

back action to take in the event of an LAPM

negotiation failure. These fallback options

are initiated immediately upon connection

if S48 = 128. If an invalid number is entered,

S36 acts as if the default value has been en-

tered. (See S48.)

0 Modem disconnects.

1 Modem stays online and a direct

mode connection is established.

2 Reserved.

3 Modem stays on-line and a normal

mode connection is established.

4 An MNP connection is attempted and

if it fails, the modem disconnects.

5 An MNP connection is attempted and

if it fails, a direct mode connection is

established.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Range

Default Description

6 Reserved.

7 An MNP connection is attempted and

if it fails, a normal modem connection

is established.

S37

decimal

Sets the maximum V.34 speed at which the

modem attempts to connect. The default

value is an automode connection. If N0 is

active, connection is attempted at the most

recently sensed serial port speed (+MS=

command settings are updated to the ap-

propriate values). If N1 is active, connec-

tion is attempted at the highest possible

speed. (+MS= settings are updated to

11,1,300,3360 to reflect V.34, automode,

300 bps minimum speed, and 33600 bps

maximum speed). Supported only for

compatibility with existing software; use

the +MS= command instead.

S38

seconds 0–254, 255 20

Sets the delay between the modem’s receipt

of the H command to disconnect (or high-

to-low transition of DTR if the modem is

programmed to follow the signal), and the

disconnect operation. Applies only to error-

correction connections. This register can be

used to ensure that data in the modem buff-

er is sent before the modem disconnects. If

S38 is set to a value between 0 and 254, the

modem waits for the remote modem to ac-

knowledge all data in the modem buffer

before disconnecting. If S38 is set to 255, the

modem does not time out, and continues to

attempt to deliver data in the buffer until

the connection is lost or the data is delivered.

S46

S48

decimal 136, 138 138

Enables or disables data compression:

136 Error correction without compression.

138 Error correction with compression.

decimal 0, 7, 128

Enables or disables LAPM negotiation. An

invalid value is treated as a 128 value.

0 Disables negotiation and proceeds

with LAPM.

7 Enables negotiation.

128 Disables negotiation and proceeds at

once with the fallback action specified

in S36. Can be used to force MNP.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Range

Default Description

n/ a When the modem issues a NO CARRIER

S86

decimal 0, 3–23

result code, a value is written to this register

to help determine the reason for the failed

connection. S86 records the first event that

contributes to a NO CARRIER message. Use

the S86? command to read the value.

0 Normal disconnect; no error occurred.

3 Call Waiting caused disconnect.

4 Physical loss of carrier.

5 No error correction at the other end.

6 No response to feature negotiation.

7 This modem is async-only, the other

sync-only.

8 No framing technique in common.

9 No protocol in common.

10 Bad response to feature negotiation.

11 No sync information from remote

modem.

12 Normal disconnect initiated by remote

modem.

13 Remote modem does not respond after

10 retransmissions of the same message.

14 Protocol violation.

15 DTR lost.

15 Three retrains or excessive

retransmissions when no DTR.

16 Received GSTN cleardown.

17 Inactivity timeout.

18 Speed not supported.

19 Long space disconnect.

20 Key abort disconnect.

21 Clears previous disconnect reason.

22 No connection established.

23 Disconnect after three retrains.

S95

decimal 0–15,

32–47

The bits in this register can be set to over-

ride some of the W command options. A bit

set to a 1 in this register enables the corre-

sponding result code regardless of the W

setting.

Bit 0 CONNECT result code indicates

DCE speed instead of DTE speed.

Bit 1 Append/ ARQ to CONNECT XXXX

result code in error-correction mode.

Bit 2 Enable CARRIER XXXX result code.

Bit 3 Enable PROTOCOL XXXX result code.

Bit 4 Reserved.

Bit 5 Enable COMPRESSION result code .

Bit 6 Reserved.

Bit 7 Reserved.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Re s u lt Co d e s

In command mode your modem can send the following responses, called result

codes, to your computer. Result codes are used by communications programs and

can also appear on your monitor.

Terse Verbose

Description

Command executed

CONNECT

RING

Modem connected to line

Ring signal detected

NO CARRIER

ERROR

Carrier signal lost or not detected

Invalid command

CONNECT 1200

NO DIALTONE

BUSY

Connected at 1200 bps

No dial tone detected

Busy signal detected

NO ANSWER

CONNECT 0600

CONNECT 2400

CONNECT 4800

CONNECT 9600

CONNECT 7200

CONNECT 12000

CONNECT 14400

CONNECT 19200

CONNECT 38400

CONNECT 57600

CONNECT 115200

CONNECT 230400

No answer at remote end

Connected at 600 bps

Connected at 2400 bps

Connected at 4800 bps

Connected at 9600 bps

Connected at 7200 bps

Connected at 12000 bps

Connected at 14400 bps

Connected at 19200 bps

Connected at 38400 bps

Connected at 57600 bps

Connected at 115200 bps

Connected at 230400 bps

CONNECT 75TX/1200RX V.23 connection in originate mode

CONNECT 1200TX/75RX V.23 connection in answer mode

DELAYED

BLACKLISTED

FAX

Delay is in effect for the dialed number

Dialed number is blacklisted

Connected in fax mode

DATA

Connected in data mode

CARRIER 300

CARRIER 1200/75

CARRIER 75/1200

CARRIER 1200

CARRIER 2400

CARRIER 4800

CARRIER 7200

CARRIER 9600

CARRIER 12000

CARRIER 14400

CARRIER 16800

CARRIER 19200

CARRIER 21600

CARRIER 24000

CARRIER 26400

CARRIER 28800

CONNECT 16800

CONNECT 21600

0-300 bps data carrier detected

V.23 backward channel detected

V.23 forward channel detected

1200 bps data carrier detected

2400 bps data carrier detected

4800 bps data carrier detected

7200 bps data carrier detected

9600 bps data carrier detected

12000 bps data carrier detected

14400 bps data carrier detected

16800 bps data carrier detected

19200 bps data carrier detected

21600 bps data carrier detected

24000 bps data carrier detected

26400 bps data carrier detected

28800 bps data carrier detected

Connected at 16800 bps

Connected at 21600 bps

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Terse Verbose

Description

CONNECT 24000

CONNECT 26400

CONNECT 28800

Connected at 24000 bps

Connected at 26400 bps

Connected at 28800 bps

COMPRESSION CLASS 5 Connected with MNP Class 5 data compression

COMPRESSION V.42 bis Connected with V.42 bis data compression

COMPRESSION NONE Connected without data compression

PROTOCOL NONE

PROTOCOL LAPM

CARRIER 31200

CARRIER 33600

PROTOCOL ALT

Connected without any protocol

Connected in V.42 LAPM mode

56000 bps data carrier detected

33600 bps data carrier detected

Connected in MNP mode

PROTOCOL ALT-CELLULAR Connected in MNP 10 mode

CONNECT 33600

CONNECT 31200

CARRIER 32000

CARRIER 34000

CARRIER 36000

CARRIER 38000

CARRIER 40000

CARRIER 42000

CARRIER 44000

CARRIER 46000

CARRIER 48000

CARRIER 50000

CARRIER 52000

CARRIER 54000

CARRIER 56000

CONNECT 32000

CONNECT 34000

CONNECT 36000

CONNECT 38000

CONNECT 40000

CONNECT 42000

CONNECT 44000

CONNECT 46000

CONNECT 48000

CONNECT 50000

CONNECT 52000

CONNECT 54000

CONNECT 56000

CONNECT 28000

CARRIER 28000

CONNECT 29333

CARRIER 29333

CONNECT 30667

CARRIER 30667

CONNECT 33333

CARRIER 33333

CONNECT 34667

CARRIER 34667

Connected at 33600 bps

Connected at 31200 bps

150

151

152

153

154

155

156

157

158

159

160

161

162

165

166

167

168

169

170

171

172

173

174

175

176

177

180

181

182

183

184

32000 bps data carrier detected

34000 bps data carrier detected

36000 bps data carrier detected

38000 bps data carrier detected

40000 bps data carrier detected

42000 bps data carrier detected

44000 bps data carrier detected

46000 bps data carrier detected

48000 bps data carrier detected

50000 bps data carrier detected

52000 bps data carrier detected

54000 bps data carrier detected

56000 bps data carrier detected

Connected at 32000 bps

Connected at 34000 bps

Connected at 36000 bps

Connected at 38000 bps

Connected at 40000 bps

Connected at 42000 bps

Connected at 44000 bps

Connected at 46000 bps

Connected at 48000 bps

Connected at 50000 bps

Connected at 52000 bps

Connected at 54000 bps

Connected at 56000 bps

Connected at 28000 bps (V.90 mode)

28000 bps data carrier detected (V.90 mode)

Connected at 29333 bps (V.90 mode)

29333 bps data carrier detected (V.90 mode)

Connected at 30667 bps (V.90 mode)

30667 bps data carrier detected (V.90 mode)

Connected at 33333 bps (V.90 mode)

33333 bps data carrier detected (V.90 mode)

Connected at 34667 bps (V.90 mode)

34667 bps data carrier detected (V.90 mode)

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

Terse Verbose

Description

185

186

187

188

189

190

191

192

193

194

+F4

CONNECT 37333

CARRIER 37333

Connected at 37333 bps (V.90 mode)

37333 bps data carrier detected (V.90 mode)

CONNECT 38667

CARRIER 38667

CONNECT 41333

CARRIER 41333

CONNECT 42667

CARRIER 42667

CONNECT 45333

CARRIER 45333

CONNECT 46667

CARRIER 46667

CONNECT 49333

CARRIER 49333

CONNECT 50667

CARRIER 50667

CONNECT 53333

CARRIER 53333

CONNECT 54667

CARRIER 54667

+FCERROR

Connected at 38667 bps (V.90 mode)

38667 bps data carrier detected (V.90 mode)

Connected at 41333 bps (V.90)

41333 bps data carrier detected (V.90)

Connected at 42667 bps (V.90)

42667 bps data carrier detected (V.90)

Connected at 45333 bps (V.90)

45333 bps data carrier detected (V.90)

Connected at 46667 bps (V.90)

46667 bps data carrier detected (V.90)

Connected at 49333 bps (V.90)

49333 bps data carrier detected (V.90)

Connected at 50667 bps (V.90)

50667 bps data carrier detected (V.90)

Connected at 53333 bps (V.90)

53333 bps data carrier detected (V.90)

Connected at 54667 bps (V.90)

54667 bps data carrier detected (V.90)

V.21 signal received/ high speed fax expected

(V.27, V.29, V.33 or V.17).

Multi-Tech Systems, Inc.

Ch a p t e r 5 - So lv in g

P r o b le m s

MultiModemDSVD User Guide

5 Solving Problems

In t r o d u ct io n

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. How-

ever, 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 before calling

Technical Support (see Appendix D).

No n e o f t h e In d ica t o r s Lig h t

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.

✔ 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 modem 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.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

5 Solving Problems

Th e M o d e m Do e s No t Re s p o n d t o Co m m a n d s

✔ 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 automatically 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 E^NTER. If you get an OK response, your connections are good

and the problem likely is in the connection setup in your communications software.

✔ Try resetting your modem by turning it off and on. If you are using DOS or Win-

dows 3.1 communications software, make sure the initialization 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 communications 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 automat-

ically. 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 communica-

tions 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 seri-

al port preconfigured as COM1 or COM2. The extra serial 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.

Windows 3.1x: To look for address or IRQ conflicts, in Program Manager select

File | Run, type MSD, and press E^NTER. 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 address 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.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

5 Solving Problems

Windows 9x: 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

communication 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 re-

quest. If another device is using the same address range or IRQ, it appears in the

Conflicting Device List. Uncheck Use automatic settings to change the port’s

settings so they do not conflict with the other device, or select the port the con-

flicting 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 docu-

mentation.

Windows NT 4.0: To look for address or IRQ conflicts, click Start, Programs, Ad-

ministrative Tools (Common), and Windows NT Diagnostics. In the Windows

NT Diagnostics dialog box, click the Resources tab to see which input/ output

ranges and interrupt requests are in use. If you need to open your computer to

change switches or jumpers on the conflicting device; refer to the device’s docu-

mentation.

✔ The serial port might be defective. If you have another serial port, install the mo-

dem on it, change the COM port setting in your software, and try again.

✔ The modem might be defective. If you have another Multi-Tech modem, try swap-

ping modems. If the problem goes away, the first modem is possibly defective.

Call Tech Support for assistance (see Appendix D).

Th e M o d e m Dia ls Bu t Ca n n o t Co n n ec t

There can be several reasons the modem fails to make a connection. Possibilities 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 re-

sult codes are enabled by default. If they have been disabled, include V1X4 in the

modem’s initialization string, or in terminal mode enter ATV1X4 and press ENTER.

When you dial again, the modem will report the call’s progress.

✔ If the modem reports NO DIALTONE, check that the modem’s telephone 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

behind 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).

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

5 Solving Problems

✔ 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 automatically 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 HyperTerminal, select Connect 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 per-

son answered instead of a computer, or you might have dialed the correct

number but the other computer or software 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

having problems negotiating because of modem incompatibilities or line noise.

Try connecting at a lower speed.

Th e M o d e m Dis co n n ect s W h ile O n lin e

✔ 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, dis-

able 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, se-

lect Settings | Modem Commands. To change it in Windows 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 fre-

quent 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 tele-

phone 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 ex-

ceeded your time limit for the day. Try again.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

5 Solving Problems

Th e M o d e m Ca n n o t Co n n ec t W h e n

An s w e r in g

✔ Autoanswer might be disabled. Turn on autoanswer in your datacomm program

or send the command ATS0=1 (ATS0=2 if you have Caller ID service) to your

modem in terminal mode.

File Tr a n s fe r Is Slo w e r T h a n It Sh o u ld 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, try Zmodem or Ymo-

dem/ 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 compression en-

abled? 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.

✔ Does your Internet service provider (ISP) use the same 56K protocol as your mo-

dem? The default setting of your modem is to connect using either the K56flex or

the V.90 protocol, depending on which one the ISP modem is using. If your ISP

uses the X2 protocol, the maximum speed you will be able to connect at is 33,600

bps. Check with your ISP to see which protocols it supports.

✔ Try entering the &V1 command to display information about the last connection,

making a screen print of the connection statistics, and checking for parameters

that might be unacceptable.

Da t a Is Be in g Lo s t

✔ 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 matches the method

selected in the modem. If you are using the modem with a Macintosh, you might

have the wrong cable for hardware flow control.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

5 Solving Problems

✔ 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 driv-

er, COMM.DRV.

✔ Try entering the &V1 command to display information about the last connection,

making a screen print of the connection statistics, and checking for parameters

that might be unacceptable.

Th e r e Ar e Ga r b a ge Ch a r a ct e r s o n t h e M o n it o r

✔ 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 transmis-

sion or error correction standards as your modem. Try connecting at a slower

speed or disabling error correction. (With no error correction, however, line noise

can cause garbage characters.)

✔ Try entering the &V1 command to display information about the last connection,

making a screen print of the connection statistics, and checking for parameters

that might be unacceptable.

Th e M o d e m Do e s n ’t Wo r k w it h Ca lle r 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 ini-

tialization 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 company.

Fa x a n d Da t a So ft w a r e Ca n ’t Ru n a t t h e Sa m e

Tim e

✔ Communications devices can be accessed by only one application at a time. Un-

der 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.

Multi-Tech Systems, Inc.

Ap p e n d ixe s

MultiModemDSVD User Guide

A Regulatory Compliance

Ap p e n d ix A: Re g u la t o r y Co m p lia n ce

FCC Pa r t 6 8 Te le co m

1. This equipment complies with part 68 of the Federal Communications Commis-

sion Rules. On the outside surface of this equipment is a label that contains,

among other information, the FCC registration number. 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.

3. An FCC-compliant telephone cord and modular plug is provided with this

equipment. This equipment is designed to be connected to the telephone net-

work or premises wiring using a compatible modular jack that is Part 68 compli-

ant. See installation instructions for details.

4. The ringer equivalence number (REN) is used to determine the number of devic-

es that may be connected to the telephone line. Excessive RENs on the telephone

line may result in the device not ringing in response to an incoming call. In

most, but not all, areas the sum of the RENs should not exceed 5.0. To be certain

of the nuber of devices that may be connected to the line, as determined by the

total RENs, contact the local telephone company.

5. If this equipment causes harm to the telephone network, the telephone company

will notify you in advance that temporary discontinuance of service may be re-

quired. But if advance notice is not practical, the telephone company will notify

you as soon as possible. Also, you will be advised of your right to file a com-

plaint with the FCC if you believe it is necessary.

6. The telephone company may make changes in its facilities, equipment, opera-

tions, or procedures that could affect the operation of the equipment. If this hap-

pens, the telephone company will provide advance notice in order for you to

make necessary modifications in order to maintain uninterrupted service.

7. If trouble is experienced with this equipment (the model of which is indicated

below) please contact Multi-Tech Systems, Inc. at the address shown below for

details of how to have repairs made. If the trouble is causing harm to the tele-

phone network, the telephone company may request you remove the equipment

from the network until the problem is resolved.

8. No repairs are to be made by you. Repairs are to be made only by Multi-Tech

Systems or its licensees. Unauthorized repairs void registration and warranty.

9. This equipment should not be used on party lines or coin lines.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

A Regulatory Compliance

10. If so required, this equipment is hearing-aid compatible.

Manufacturer:

Multi-Tech Systems, Inc.

Model Number:

MT5600DSVD

FCC Registration No:

Ringer Equivalence:

Modular Jack (USOC):

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

U.S.A.

(763) 785-3500

(763) 785-9874 Fax

FCC Pa r t 15

This equipment has been tested and found to comply with the limits for a Class B

digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to

provide reasonable protection against harmful interference in a residential installa-

tion. This equipment generates, uses, and can radiate radio frequency energy, and if

not installed and used in accordance with the instructions, may cause harmful inter-

ference to radio communications. However, there is no guarantee that interference

will not occur in a particular installation. If this equipment does cause harmful inter-

ference to radio or television reception, which can be determined by turning the

equipment off and on, the user is encouraged to try to correct the interference by one

or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Plug the equipment into an outlet on a circuit different from that to which the re-

ceiver is connected.

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

This device complies with Part 15 of the FCC rules. Operation of this device is sub-

ject to the following conditions: (1) This device may not cause harmful interference,

and (2) this device must accept any interference that may cause undesired operation.

WARNING: Changes or modifications to this unit not expressly approved by the

party responsible for compliance could void the user’s authority to operate the

equipment.

In d u s t r y Ca n a d a

This Class B digital apparatus meets all requirements of the Canadian Interference-

Causing Equipment Regulations.

Cet appareil numérique de la classe B respecte toutes les exigences du Reglement

Canadien sur le matériel brouilleur.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

A Regulatory Compliance

Fa x Br a n d in g St a t e m e n t

The Telephone Consumer Protection Act of 1991 makes it unlawful for any person to

use a computer or other electronic device, including fax machines, to send any mes-

sage unless such message clearly contains the following information:

• Date and time the message is sent

• Identification of the business or other entity, or other individual sending the

message

• Telephone number of the sending machine or such business, other entity, or

individual

This information is to appear in a margin at the top or bottom of each transmitted

page or on the first page of the transmission. (Adding this information in the margin

is referred to as fax branding.)

Since any number of fax software packages can be used with this product, the user

must refer to the fax software manual for setup details. Typically the fax branding

information must be entered via the configuration menu of the software.

Ca n a d ia n Lim it a t io n s No t ice

Notice: The ringer equivalence number (REN) assigned to each terminal device pro-

vides an indication of the maximum number of terminals allowed to be connected to

a telephone interface. The termination on an interface may consist of any combination

of devices subject only to the requirement that the sum of the ringer equivalence

numbers of all the devices does not exceed 5.

Notice: The Industry Canada label identifies certificated equipment. This certifica-

tion means that the equipment meets certain telecommunications network protec-

tive, 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 ensure that it is permissible to be con-

nected to the facilities of the local telecommunications company. The equipment

must also be installed using an acceptable method of connection. The customer

should be aware that compliance with the above conditions may not prevent degra-

dation of service in some situations. Repairs to certified equipment should be made

by an authorized Canadian maintenance facility designated by the supplier. Any re-

pairs or alterations made by the user to this equipment or equipment malfunctions

may give the telecommunications company cause to request the user to disconnect

the equipment.

Users should ensure for their own protection that the electrical ground connections

of the power utility, telephone 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 themselves, but should

contact the appropriate electric inspection authority, or electrician, as appropriate.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

A Regulatory Compliance

EMC, Sa fe t y, a n d R&TTE Dir e c t ive Co m p lia n ce

The CE mark is affixed to this 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 harmonization of the

laws of Member States relating to electrical equipment designed for use within

certain voltage limits;

and

•

Council Directive 1999/ 5/ EC of 9 March 1999 on radio equipment and telecom-

munications terminal equipment and the mutual recognition of their conformity.

In t e r n a t io n a l M o d e m Re s t r ic t io n s

Some dialing and answering defaults and restrictions may vary for international

modems. Changing settings may cause a modem to become non-compliant with

national telecom requirements in specific countries. Also note that some software

packages may have features or lack restrictions that may cause the modem to be-

come non-compliant.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

B Technical Specifications

Ap p e n d ix B: Te ch n ica l Sp e c if ica t io n s

Your MultiModemDSVD modem meets the following specifications:

Trade Name

MultiModemDSVD™

Model Number

MT5600DSVD or MT5600DSVD2

Server-to-Client

Data Rates

K56flex or V.90 speeds when accessing an ISP type K56flex

or V.90 server (actual speed depends on server 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 ITU-T V.90; 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.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

Error Correction

ITU-T V.70 DSVD

ITU-T V.42 (LAP-M or MNP 3–4)

ITU-T V.42bis (4:1 throughput), MNP 5 (2:1 throughput)

Data Compression

Speed Conversion

Serial port data rates adjustable to 300, 1200, 2400, 4800,

9600, 19,200, 38,400, 57,600, 115,200, and 230,400 bps

Mode of Operation

Fax online modes; full duplex over dial-up lines; AT and

AT#V command modes supporting answering machine and

voice mail functions

Flow Control

XON/ XOFF (software), RTS/ CTS (hardware)

Intelligent Features

Plug and play; fully AT command compatible; autodial, re-

dial, repeat dial; pulse or tone dial; dial pauses; auto an-

swer; caller ID; EIA extended automode; adaptive line

probing; automatic symbol and carrier frequency during

start-up, retrain, and rate renrgotiation; DTMF detection;

call status display, auto-parity and data rate selections; key-

board-controlled modem options; non-volatile memory; on-

screen displays for modem option parameters; command

lines of up to 40 characters each.

Command Buffer

40 characters

*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.

MultiModemDSVD User Guide

B Technical Specifications

Data Modulation

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

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

(2400 & 1200 bps)

Transmit originate: 1200 Hz

Transmit answer: 2400 Hz

Receive originate: 2400 Hz

Receive answer:

1200 Hz

Carrier Frequencies

ITU-T V.23

Transmit originate: 390 Hz mark

450 Hz space

(1200 bps)

Receive originate: 1300 Hz mark

2100 Hz space

Transmit answer: 1300 Hz mark

2100 Hz space

Receive answer:

390 Hz mark

450 Hz space

Carrier Frequencies

ITU-T V.21

Transmit originate: 980 Hz mark

1180 Hz space

(0–300 bps)

Receive originate: 1650 Hz mark

1850 Hz space

Transmit answer: 1650 Hz mark

1850 Hz space

Receive answer:

980 Hz mark

1180 Hz space

Carrier Frequencies

Bell 103/113

Transmit originate: 1270 Hz mark

1070 Hz space

(0–300 bps)

Receive originate: 2225 Hz mark

2025 Hz space

Transmit answer: 2225 Hz mark

2025 Hz space

Receive answer:

1270 Hz mark

1070 Hz space

Fax Carrier

Frequencies

V.21 Ch2 (half duplex):

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

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

B Technical Specifications

Voice Compression

and Sampling Rate

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 ad-

vantage 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

Impedances

Microphone input: 2.2 kW (MT5600DSVD only)

Speaker output:

50W (MT5600DSVD only)

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.

Cables

One RJ-11 phone cable (USA); country-specific cord for UK

and International models; 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, re-

mote 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 moni-

toring.

Manual Control

Environmental

ON/ OFF power switch

Temperature range 0°–50°C (32°–120°F); humidity range

20–90% (non-condensing)

Power Requirements

100–130VAC, 50/ 60 Hz, 5 W; two-prong outlet-mounted

transformer (included); 230V/ 50 Hz optional (international)

Power Consumption

Dimensions

9 VDC, 300 mA maximum transformer output

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)

10 years

Limited Warranty

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

C Warranty, Service, and Technical Support

Ap p e n d ix C: Wa r r a n t y, Se r v ice , a n d

Te ch n ica l Su p p o r t

M u lt i-Te c h Sys t e m s, In c . Wa r r a n t y & Re p a ir s Po lic ie s

Warranty

Multi-Tech Systems, Inc., (hereafter “MTS”) warrants that its products will be free

from defects in material or workmanship for a period of two, five, or ten years

(depending on model) from date of purchase, or if proof of purchase is not

provided, two, five, or ten years (depending on model) from date of shipment.

MTS MAKES NO OTHER WARRANTY, EXPRESS OR IMPLIED, AND ALL

IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

PARTICULAR PURPOSE ARE HEREBY DISCLAIMED.

This warranty does not apply to any products which have been damaged by

lightning storms, water, or power surges or which have been neglected, altered,

abused, used for a purpose other than the one for which they were manufactured,

repaired by 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 which prove to be defective within the

warranty period or, at MTS’s option, issuance of a refund of the purchase price.

Defective products must be returned by Customer to MTS’s factory – transportation

prepaid.

MTS WILL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES, AND UNDER

NO CIRCUMSTANCES WILL ITS LIABILITY EXCEED THE PRICE FOR

DEFECTIVE PRODUCTS.

Repair Procedures for U.S. and Canadian Customers

In the event that service is required, products may be shipped, freight prepaid, to

our Mounds View, Minnesota factory:

Multi-Tech Systems, Inc.

2205 Woodale Drive

Mounds View, MN 55112

Attn: Repairs, Serial # ____________

A Returned Materials Authorization (RMA) is not required. Return shipping

charges (surface) will be paid by MTS.

Please include, inside the shipping box, a description of the problem, a return

shipping address (must have street address, not P.O. Box), your telephone number,

and if the product is out of warranty, a check or purchase order for repair charges.

For out of warranty repair charges, go to www.multitech.com/ documents/

warranties

Extended two-year overnight replacement service agreements are available for

selected products. Please call MTS at (888) 288-5470, extension 5308 or visit our web

site at http:/ / www.multitech.com/ programs/ orc/ for details on rates and

coverage’s.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

C Warranty, Service, and Technical Support

Please direct your questions regarding technical matters, product configuration,

verification that the product is defective, etc., to our Technical Support department

at (800) 972-2439 or email tsupport@multitech.com. Please direct your questions

regarding repair expediting, receiving, shipping, billing, etc., to our Repair

Accounting department at (800) 328-9717 or (763) 717-5631, or email

mtsrepair@multitech.com.

Repairs for damages caused by lightning storms, water, power surges, incorrect

installation, physical abuse, or user-caused damages are billed on a time-plus-

materials basis.

Repair Procedures for International Customers (Outside U.S.A. and Canada)

Your original point of purchase Reseller may offer the quickest and most economical

repair option for your Multi-Tech product. You may also contact any Multi-Tech

sales office for information about the nearest distributor or other repair service for

your Multi-Tech product.

http:/ / www.multitech.com/ COMPANY/ offices/ DEFAULT.ASP

In the event that factory service is required, products may be shipped, freight

prepaid to our Mounds View, Minnesota factory. Recommended international

shipment methods are via Federal Express, UPS or DHL courier services, or by

airmail parcel post; shipments made by any other method will be refused. A

Returned Materials Authorization (RMA) is required for products shipped from

outside the U.S.A. and Canada. Please contact us for return authorization and

shipping instructions on any International shipments to the U.S.A. Please include,

inside the shipping box, a description of the problem, a return shipping address

(must have street address, not P.O. Box), your telephone number, and if the product

is out of warranty, a check drawn on a U.S. bank or your company’s purchase order

for repair charges. Repaired units shall be shipped freight collect, unless other

arrangements are made in advance.

Please direct your questions regarding technical matters, product configuration,

verification that the product is defective, etc., to our Technical Support department

nearest you or email tsupport@multitech.com. When calling the U.S., please direct

your questions regarding repair expediting, receiving, shipping, billing, etc., to our

Repair Accounting department at +(763) 717-5631 in the U.S.A., or email

mtsrepair@multitech.com.

Repairs for damages caused by lightning storms, water, power surges, incorrect

installation, physical abuse, or user-caused damages are billed on a time-plus-

materials basis.

Repair Procedures for International Distributors

Procedures for International Distributors of Multi-Tech products are on the

distributor web site.

http:/ / www.multitech.com/ PARTNERS/ login/

O n lin e Wa r r a n t y Re g is t r a t io n

If you have access to the World Wide Web, you can register your Multi-Tech

product online at http://www.multitech.com/register/.

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

C Warranty, Service, and Technical Support

Se r v ice

U.S. and Canadian Customers

In the event that service is required, products may be shipped, freight prepaid, to

our Mounds View, Minnesota, factory:

Multi-Tech Systems, Inc.

2205 Woodale Drive

Mounds View, MN 55112

Attn: Repairs, Serial #______

A Returned Materials Authorization (RMA) is not required. Return shipping

charges (surface) will be paid by MTS. Please include inside the shipping box a

description of the problem, a return shipping address (must have street address, not

P.O. Box), a telephone number, and if the product is out of warranty, a check or

purchase order for repair charges.

For out of warranty repair charges, go to http://www.multitech.com/documents/

warranties.

Extended two-year overnight replacement agreements are available for selected

products. Please call MTS at 888 288-5470, extension 5308, or visit our web site at

http://www.multitech.com/PROGRAMS/orc/ for details on rates and coverages.

Please direct your questions regarding technical matters, product configuration,

verification that the product is defective, etc., to our Technical Support department

at 800 972-2439 or e-mail tsupport@multitech.com.

Please direct your questions regarding repair expediting, receiving, shipping,

billing, etc., to our Repair Accounting department at 800 328-9717 or +763 785-3500,

or e-mail mtsrepair@multitech.com.

Repairs for damages caused by lightning storms, water, power surges, incorrect

installation, physical abuse, or user-caused damages are billed on a time-plus-

materials basis.

International Customers (outside U.S.A. and Canada)

Your original point of purchase reseller may offer the quickest and most economical

repair option for your Multi-Tech product. You may also contact any Multi-Tech

sales office for information about the nearest distributor or other repair service for

your Multi-Tech product: http://www.multitech.com/COMPANY/offices/

DEFAULT.ASP.

In the event that factory service is required, products may be shipped, freight

prepaid, to our Mounds View, Minnesota, factory. Recommended international

shipment methods are via Federal Express, UPS or DHL courier services, or by

airmail parcel post; shipments made by any other method will be refused. A

Returned Materials Authorization (RMA) is required for products shipped from

outside the U.S.A. and Canada. Please contact us for return authorization and

shipping instructions on any international shipments to the U.S.A. Please include,

inside the shipping box, a description of the problem, a return shipping address

(must have street address, not P.O. Box), your telephone number, and if the product

is out of warranty, a check drawn on a U.S. bank or your company’s purchase order

for repair charges. Repaired units will be shipped freight collect, unless other

arrangements are made in advance.

Please direct questions regarding technical matters, product configuration, verifica-

tion that the product is defective, etc., to our Technical Support department nearest

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

C Warranty, Service, and Technical Support

you, as listed at http://www.multitech.com/COMPANY/offices/DEFAULT.ASP., or e-

mail tsupport@multitech.com. When calling the U.S., please direct questions regarding

repair expediting, receiving, shipping, billing, etc., to our Repair Accounting depart-

ment at +763 717-5631 in the U.S.A., or e-mail mtsrepair@multitech.com.

Repairs for damages caused by lightning storms, water, power surges, incorrect

installation, physical abuse, or user-caused damages are billed on a time-plus-mate-

rials basis.

International Distributors

Procedures for international distributors of Multi-Tech products are on the Distribu-

tor Web site at http://www.multitech.com/PARTNERS/login/.

Re p la ce m e n t Pa r t s

SupplyNet, Inc., can supply you with replacement power supplies, cables and con-

nectors for selected Multi-Tech products. You can place an order with SupplyNet

via mail, phone, fax or the Internet at the following addresses:

Mail:

SupplyNet, Inc.

614 Corporate Way

Valley Cottage, NY 10989

800 826-0279

Phone:

Fax:

914 267-2420

Email:

Internet:

info@thesupplynet.com

http://www.thesupplynet.com

Te c h n ic a l Su p p o r t

Multi-Tech Systems has an excellent staff of technical support personnel 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 763

785-3500 (international and local). Please have modem information available. You

can also contact Technical Support by e-mail at the following addresses:

Country

Telephone

France:

U.K.:

U.S.A., Canada

Rest of world:

support@multitech.fr

support@multitech.co.uk

tsupport@multitech.com

+(33) 1-64 61 09 81

+(44) 118 959 7774

800 972-2439

+763 717-5863

Please note the status of the modem before contacting Technical Support. Status

information can include the state of the LED indicators, screen messages, diagnostic

test results, problems with a specific application, etc.

In t e r n e t Sit e s

Multi-Tech maintains a Web site at

http://www.multitech.com

and an ftp site at

ftp://ftp.multitech.com

Multi-Tech Systems, Inc.

MultiModemDSVD User Guide

D Upgrading the Modem

Multi-Tech Systems, Inc.

Miele Saw B 895 D User Manual
Newcon Optik Hunting Equipment LRM 220SI User Manual
Nikon Binoculars Laser IRT User Manual
Novatel Wireless Network Router CC208 User Manual
OEM Systems Switch VX 100 User Manual
Omnimount TV Video Accessories TORINO36 User Manual
One for All Universal Remote URC 6690 User Manual
Palm Cell Phone Pre Plus User Manual
Panasonic Vacuum Cleaner MC UG581 User Manual
Patton electronic Surge Protector MODEL 2126 User Manual