Multitech MultiModemDSVD, MT5600DSVD2 User Manual

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FCC Part 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 installation. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Plug the equipment into an outlet on a circuit different from that to which the receiver is connected.

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

This device complies with Part 15 of the FCC rules. Operation of this device is subject to the following conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

WARNING: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

Industry Canada

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 sur le matériel brouilleur du Canada.

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MT5600DSVD User Guide

Model MT5600DSVD2 88311650 Revision A (5/13/99)

Multi-Tech Systems, Inc. makes no representations or warranties with respect to the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any particular purpose. Furthermore, Multi-Tech Systems, Inc. reserves the right to revise this publication and to make changes in the content hereof without obligation of Multi-Tech Systems, Inc. to notify any person or organization of such revisions or changes.

Record of Revisions

Revision Date Description

A 5/13/99 Manual released.

Trademarks

MultiModemDSVD, Multi-Tech, and the Multi-Tech logo are trademarks of Multi-Tech Systems, Inc.

IBM is a trademark of International Business Machines Corporation. MNP and Microcom Network Protocol are trademarks of Microcom, Inc. K56flex is a registered trademark of Rockwell International Corporation and Lucent Technologies Corporation. Microsoft, Windows, Windows 95, and Windows NT are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.

Notice

Though these modems are capable of 56K bps download performance, line impairments, public telephone infrastructure and other external technological factors currently prevent maximum 56K bps connections.

Multi-Tech Systems, Inc. 2205 Woodale Drive Mounds View, MN 55112 U.S.A

(763) 785-3500 or (800) 328-9717 Fax (763) 785-9874

Technical Support (800) 972-2439 Internet http://www.multitech.com

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Chapter 1: Introduction

Introduction ............................................................................................................................. 2

Product Description................................................................................................................ 2

Features .................................................................................................................................... 2

What Is in Your Modem Package? ....................................................................................... 4

Related Manuals ..................................................................................................................... 4

Chapter 2: Quick Start

Introduction ............................................................................................................................. 6

What You Will Need ..............................................................................................................6

We supply ......................................................................................................................... 6

You supply ....................................................................................................................... 6

Safety Warnings ...................................................................................................................... 6

Step 1: Mount the Feet............................................................................................................ 7

Step 2: Connect the Modem to Your System ...................................................................... 7

RS232 Connection ............................................................................................................ 8

Line Connection ............................................................................................................... 8

Phone Connection............................................................................................................ 8

Power Connection ........................................................................................................... 8

Power-On Test ................................................................................................................. 8

Step 3: Install the Modem Driver ......................................................................................... 9

Installing the Modem in Windows ............................................................................... 9

Removing Your Old Modem from Windows.............................................................. 9

Step 4: Install and Configure Your Software .................................................................... 10

Step 5: Call the Multi-Tech BBS .......................................................................................... 11

Trio DataComm ............................................................................................................. 11

Windows HyperTerminal ............................................................................................ 12

Windows Terminal ........................................................................................................ 13

Step 6: Send a Fax ................................................................................................................. 14

Trio Fax ........................................................................................................................... 14

Microsoft Fax .................................................................................................................. 14

Voice Operation .................................................................................................................... 16

To Turn On DSVD Mode .............................................................................................. 16

To Turn Off DSVD Mode ............................................................................................. 16

To Originate a DSVD Call ............................................................................................ 16

To Answer a DSVD Call ............................................................................................... 17

References .............................................................................................................................. 17

Contents

Chapter 3: Features

What Can You Do with Your Modem? ............................................................................. 20

Required Equipment ............................................................................................................ 20

Computer ........................................................................................................................20

Serial Cable ..................................................................................................................... 20

Telephone Line............................................................................................................... 21

Communications Software ........................................................................................... 21

Connections ........................................................................................................................... 21

Connecting to the Computer (“RS232”) ..................................................................... 21

Connecting to the Telephone Line (“LINE”) ............................................................. 21

Connecting to a Telephone Set (“PHONE”) .............................................................. 22

Connecting to Power (“PWR”) .................................................................................... 22

Surge Protectors and Lightning ................................................................................... 22

Front Panel ............................................................................................................................. 23

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MultiModemDSVD User Guide

Chapter 4: AT Commands, S-Registers & Result Codes

AT Commands ...................................................................................................................... 26

AT Command Summary ..................................................................................................... 27

Voice Commands ..................................................................................................................42

S-Registers.............................................................................................................................. 44

Result Codes .......................................................................................................................... 48

Chapter 5: Solving Problems

Introduction ........................................................................................................................... 52

None of the Indicators Light ............................................................................................... 52

The Modem Does Not Respond to Commands ............................................................... 53

The Modem Dials But Cannot Connect ............................................................................. 54

The Modem Disconnects While Online ............................................................................. 55

The Modem Cannot Connect When Answering .............................................................. 56

File Transfer Is Slower Than It Should Be ......................................................................... 56

Data Is Being Lost ................................................................................................................. 56

There Are Garbage Characters on the Monitor ................................................................ 57

The Modem Doesn’t Work with Caller ID ........................................................................ 57

Fax and Data Software Can’t Run at the Same Time ...................................................... 57

Appendix A: Regulatory Compliance

FCC Part 68 Telecom ............................................................................................................ 60

Fax Branding Statement ....................................................................................................... 61

Canadian Limitations Notice .............................................................................................. 62

International Modem Restrictions ...................................................................................... 62

Commission Decision CTR21.............................................................................................. 62

EMC and Safety Compliance .............................................................................................. 63

New Zealand Telecom Warning Notice ............................................................................ 63

Appendix B: Technical Specifications

.................................................................................. 65

Appendix C: Loopback Tests

Introduction ........................................................................................................................... 69

Local Analog Loopback Test (V.54 Loop 3) ...................................................................... 69

Remote Digital Loopback Test (V.54 Loop 2) ................................................................... 70

Local Digital Loopback Test (V.54 Loop 2) ....................................................................... 71

Appendix D: Warranty, Service, and Technical Support

Limited Warranty ................................................................................................................. 73

Service .................................................................................................................................... 73

Technical Support ................................................................................................................. 74

Online Warranty Registration ............................................................................................. 74

The Multi-Tech BBS ..............................................................................................................74

To Log on to the Multi-Tech BBS ................................................................................ 74

To Download a File ....................................................................................................... 74

Multi-Tech on the Internet................................................................................................... 75

Ordering Modem Accessories ............................................................................................ 76

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Appendix E: Upgrading the Modem

Introduction ........................................................................................................................... 77

Upgrade Overview ............................................................................................................... 77

Step 1: Identify the Modem Firmware ............................................................................... 77

Step 2: Identify the Current Firmware Version ................................................................ 78

Multi-Tech Web Site ...................................................................................................... 78

Multi-Tech BBS .............................................................................................................. 78

Step 3: Download the Upgrade File ................................................................................... 79

Multi-Tech Web Site ...................................................................................................... 79

Multi-Tech BBS .............................................................................................................. 79

Step 4: Extract the Upgrade Files........................................................................................ 79

Step 5: Record the Stored Paramenters ............................................................................. 79

Step 6: Upgrade the Modem’s Firmware .......................................................................... 80

Step 7: Restore Your Parameters ........................................................................................ 81

Contents

Index

....................................................................................................................................................................... 83

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MultiModemDSVD User Guide

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Introduction

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MultiModemDSVD User Guide

Introduction

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 owner’s manual will help you install, configure, test and use your modem.

Product Description

The MultiModemDSVD modem incorporates both the older K56flex™ protocol and the newer ITU-T V.90 protocol, both of which enable Internet connections at data rates up to 53K bps* over standard telephone lines. Using these protocols, Internet service providers (ISPs) can send data downstream to your modem at 56K speeds; however, upstream transmissions, and transmissions between client modems, are limited to data rates of 33.6K bps, as are downstream transmissions that are converted from digital to analog more than once on the telephone network.

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 telephone is 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.

Features

The MultiModemDSVD offers interactive automatic dialing and command mode configuration. You can store four command line/telephone numbers, of up to 40 characters each, in the modem’s nonvolatile memory. The modem pulse- or tonedials, 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 connection to telephone networks without notification to the telephone company.

General

• Complies with major ITU-T, TIA, and EIA international standards to ensure compatibility with other modems.

• Distinguishes data, fax, or voice calls using DTMF and tone detection with software packages supporting these features.

• Includes Caller ID to identify the caller’s phone number (available on U.S. products).

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

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

telephone infrastructure, and other external technological factors currently prevent maximum 56K bps connections.

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1 Introduction

Data

• Supports the K56flexTM and ITU-T V.90 standards 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 56K bps, but upload at speeds only 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 fallforward 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

• Can record and play back answering machine messages using connected tele-

phone handset.

• 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.

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MultiModemDSVD User Guide

What Is in Your Modem Package?

Your modem package has several components. Make sure you have them all before trying to operate your modem. Your package should include:

• An MT5600DSVD2 modem

A DC power supply

•

A set of four plastic feet

•

A modular telephone cable

•

A printed Quick Start Guide

•

This User Guide on disk

•

An installation disk

•

A CD containing data, fax, and voice software

•

If any of these items are missing, please contact Multi-Tech Systems or your dealer/distributor (see Appendix D for information on contacting Multi-Tech via telephone, fax, bulletin board service, and the Internet).

Related Manuals

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

82039201 Voice #V Commands Developer’s Kit

82076200 MT56XX Fax Class 1 Developer’s Guide

82006502 Fax Class 2 Developers’s Kit

http://www.multitech.com/support/manuals/82039201.pdf

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

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

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Quick Start

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MultiModemDSVD User Guide

Introduction

We know you are eager to get your MultiModemDSVD2 up and running, so we’ll show you step-by-step how to set it up, check it out, and make your first calls.

What You Will Need

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

We supply

An MT5600DSVD2 data/fax/voice modem

A DC power supply module

A set of four plastic feet

A modular telephone cable

A CD containing communication software

A printed Quick Start Guide

This User Guide on disk

An installation disk

You supply

A computer with an unused serial port

A shielded RS-232 serial cable with a male DB-25 connector on one end and a connector to match your computer’s serial port on the other end

A nearby AC power outlet

A nearby telephone line jack

A telephone handset

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

Safety Warnings

• 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 de-

•

signed for wet locations.

Never touch uninsulated telephone wires or terminals unless the telephone line

•

has been disconnected at the network interface.

Use caution when installing or modifying telephone lines.

•

Avoid using a telephone (other than a cordless type) during an electrical storm;

•

there is a risk of electrical shock from lightning.

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

•

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Step 1: Mount the Feet

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

Step 2: Connect the Modem to Your System

2 Quick Start

Placing the modem in a convenient location, connect it to your computer’s serial port, to the telephone line, to a telephone, and to AC power.

PWR RS232 PHONE LINE

Figure 2-2. Modem connections.

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MultiModemDSVD User Guide

RS232 Connection

Plug one end of the serial cable into the RS232 connector on the modem, and the other end into a serial port connector on your computer, such as COM1 or COM2.

Line Connection

Plug one end of the phone cable into the modem’s LINE jack, and the other end into a phone line wall jack.

Note: The LINE jack is not interchangeable with the PHONE jack. Do not plug the phone into the LINE jack or the line cable into the PHONE jack.

Note: The Federal Communications Commission (FCC) and Industry Canada impose certain restrictions on equipment connected to public telephone systems. For more information, see Appendix A.

Phone Connection

For DSVD calls, plug a telephone into the modem’s PHONE jack.

Note: The telephone can operate only when the modem is turned on.

Power Connection

Plug the power supply module into an AC power outlet or power strip. Plug the power supply’s cable into the PWR jack on the modem.

Note: Use only the power supply supplied with the modem. Use of any other power supply will void the warranty and could damage the modem.

Power-On Test

Test the modem by turning it on (a power on/off switch is located on the right side). When you apply power, the modem performs a diagnostic self-test, indicated by several indicators flashing for a second or two, after which the 56 indicator should light. If this does not happen, check that the power switch is on, the power supply is solidly connected, and the AC outlet is live. If these measures do not work, see Chapter 5, “Solving Problems.”

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Step 3: Install the Modem Driver

If you use Windows 95, Windows 98, or Windows NT 4.0, you must install the modem driver. (If you use Windows 3.1 or another operating system, skip this step and go to Step 4.) The modem driver is a description of the modem, which Windows uses to control the modem.

Installing the Modem in Windows

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 detect your modem, your modem may be unplugged, 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. In the Install New Modem wizard, 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.

2 Quick Start

3. Insert the MT5600DSVD2 setup disk into your floppy drive, and then click Have Disk.

4. In the Install from Disk dialog box, select the drive the installation disk is in, and then click OK.

5. A list of modems appears. Select your modem from the list, and then click Next.

6. Select the port the modem is connected to, and then click Next.

7. Windows installs and configures the modem.

8. Click Finish to exit.

Removing Your Old Modem from Windows

When your new modem replaces another modem, the old driver remains after you install the new driver, and the old modem remains selected in HyperTerminal and other Windows applications. Although you can change the application connection descriptions one at a time, it is easier to force Windows applications to use the new driver by removing the old one 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 modem and ask you to confirm the selection.

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MultiModemDSVD User Guide

Step 4: Install and Configure Your Software

You must have communication software installed in your computer to use your Multi-Tech modem. If you wish to use communication software that is already installed, you should reconfigure it for your new modem; otherwise, install the data and fax communication software provided with the modem.

1. Turn on your computer and run your communication software.

2. Find the dialog box or menu that lets you specify your modem. (In Windows Terminal select Settings | Modem Commands; in HyperTerminal select File |

3. Choose your modem from the software’s modem list. If it isn’t listed, choose a generic modem and modify the settings as necessary.

4. Change the modem initialization string, if necessary. The factory default configuration works well for most purposes. To load the factory default configuration, use AT&F. To load a custom configuration that was saved using the &W command, use ATZ. Note that the Z command must be in a command string by itself. For a Macintosh, the initialization string should include the &D0 command. If you do not want the modem to always answer the phone, add S0=0 to the string. To use Caller ID with the modem, add S0=2 to the string (Caller ID information is sent between the first and second rings, so the phone must ring at least twice befor the modem picks up the line). Depending on the software, you might have to end the string with a carriage return character (^M).

Note: To change the modem’s default configuration, type new commands in the software’s terminal window, adding the &W command to store them in the modem’s nonvolatile memory. For instance, to create a default configuration for a Macintosh computer that turns off autoanswer, type AT&F&D0S0=0&W. The new configuration loads automatically whenever the modem is turned on or receives the ATZ command.

5. Select the port the modem is connected to (normally COM1 or COM2).

6. Select your serial port speed. This can be labeled “maximum speed,” “DTE bps,” or “baud rate.” Ideally, if you use data compression, you should set your serial port baud rate to four times the modem’s maximum transmission speed or faster; however, few files can be compressed enough to require speeds that high, and not all serial ports can handle speeds that high. Set the serial port baud rate to 115,200 bps if your computer has a high speed serial port with a 16550AFN UART or equivalent and Windows 9x or NT 4.0, or set it to 57,600 bps if it has Windows 3.1x. If you have an older computer with a 14550 UART, set it to 19,200 bps. Older Macintosh computers can use a serial port baud rate of 57,600 bps; newer ones can use a serial port baud rate of 115,200 bps or 230,400 bps.

To see what UART your serial port uses if you have Windows 3.1x, in Program Manager select File | Run, type MSD, and press ENTER. Select COM Ports to see the UART type. If you have Windows 95, select Start | Settings | Control Panel, and double-click on the Modems icon. In the Modems Properties dialog box, click the Diagnostics tab, click the port the modem is connected to, and click More Info to see the UART type. Note that both programs will identify a

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14550 UART as an 8250A UART. If you have an 80386 or later computer, your UART is most likely a 14550 or 16550AFN.

7. If the software has an autobaud selection, make sure it is disabled. Autobaud applies only to older modems, and can cause problems if enabled.

8. If the software allows you to edit the no-connect messages (NO CARRIER,

BUSY, NO ANSWER, NO DIALTONE), make sure there is no space between DIAL and TONE in NO DIALTONE.

9. Refer to the software manual or online help for other configuration choices; in most cases you can accept the default values.

Step 5: Call the Multi-Tech BBS

Test the modem’s data functions by calling the Multi-Tech bulletin board system (BBS) and downloading REGISTER.DOC, if you have Microsoft Word 6.0 or 7.0, or REGISTER.TXT if you do not.

2 Quick Start

Trio DataComm

1. Click Start; then choose Programs, Trio Applications, and Trio Datafax.

2. Click the DataComm button. Trio DataComm starts.

3. In the Trio Datacomm File menu, click Access Phonebook. The Dialing

4. In the Dialing Directory, click New Entry. The Edit/Create Host Information

5. In the Name box, type Multi-Tech BBS and click OK.

6. In the Primary number box, type 800-392-2432 if you are in North America.

7. In the Country box, select the United States.

8. Select Dial First Digit and Dial Prefix as necessary.

9. Click OK to exit the Edit/Create Host Information dialog box.

10. In the Dialing Directory, dial the Multi-Tech BBS by double-clicking its entry.

11. When the BBS welcome screen appears, type your first name, last name, and

Directory opens.

dialog box opens.

Type 612-785-3702 if you are a local or international user.

password following the prompts. If you are a first-time caller, the BBS asks if your name is spelled correctly. If you answer Y, a questionnaire appears. You must complete the questionnaire to use the BBS on your first call.

12. Press ENTER until the Main Menu appears. From the Main Menu you have access to two areas: the File Menu and News. For help with menu commands, type ?.

13. In the Main Menu, type F and press ENTER to access the File Menu, then type D and press ENTER to download.

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MultiModemDSVD User Guide

14. At the file name prompt, if you have Microsoft Word 6.0 or later, type register.doc and press ENTER. If you do not have Microsoft Word, type register.txt and press ENTER.

15. Press ENTER twice more.

16. To select the Zmodem transfer protocol, type Z and press ENTER.

17. The download begins automatically. As the file is downloaded, a dialog box reports on the progress of the download. If the download fails, your baud rate may be set too high. Log off, set the COM port baud rate lower, and call again.

18. To log off the BBS, press ENTER, type G for “good-bye,” and press ENTER twice more.

Windows HyperTerminal

1. Click Start; then choose Programs, Accessories, and HyperTerminal.

2. Start HyperTerminal by double-clicking on the Hypertrm icon. HyperTerminal asks for the name of the connection.

3. Type Multi-Tech BBS in the Name box and click OK.

4. In North America, type 800 in the Area code box and 392-2432 in the Phone

number box. Local and international users, type 612 in the Area code box and 785-3702 in the Phone number box.

5. Verify that your modem is selected in the Connect using box, then click OK.

6. In the Connect dialog box, click Dialing Properties.

7. Make any necessary changes in the Where I am and the How I dial from this location boxes. If you must dial 9 to access an outside line, you should type 9 in both the local and the long distance boxes unless your phone system has a special requirement.

8. Click OK, then click Dial. You will know you have reached a modem by the harsh sounds of the modem handshake.

9. When the BBS welcome screen appears in the HyperTerminal window, type your first name, last name, and password following the prompts. If you are a first-time caller, the BBS asks if your name is spelled correctly. If you answer Y, a questionnaire appears. You must complete the questionnaire to use the BBS on your first call.

10. Press ENTER until the Main Menu appears. From the Main Menu you have access to two areas: the Files Menu and News. For help with menu commands, type ?.

11. In the Main Menu, type F and press ENTER to access the Files Menu, then type D and press ENTER to download.

12. At the prompt, if you have Microsoft Word 6.0 or later, type register.doc and press ENTER twice. If you do not have Microsoft Word, type register.txt and press ENTER twice.

13. Type Z and press ENTER to select the Zmodem transfer protocol.

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14. The download begins automatically. As the file is copied to the HyperTerminal folder, a dialog box reports on the progress of the download. If the download fails, your baud rate may be set too high. Log off, set the COM port baud rate lower, and call again.

15. To log off the BBS, press ENTER, type G for “good-bye,” and press ENTER twice more.

16. In the HyperTerminal window, click File, then click Save to save the HyperTerminal connection description.

Windows Terminal

1. Open the Accessories program group and double-click on the Terminal icon.

2. Select the Settings menu and make the following changes:

Phone Number: Type 1-800-392-2432 if you are in North America, or type an overseas access code and 612-785-3702 if you are outside North America.

Communications: Select the COM port the modem is connected to and change the following: Baud rate to 19200; Flow control to Hardware; and Carrier Detect to checked.

2 Quick Start

Modem Commands: Select MultiTech. If you must dial 9 to get an outside line, type ATDT9, in the Dial prefix box (include the comma).

3. Click File, then click Save, and save as multibbs.trm.

4. Click Phone, then click Dial to dial the BBS. You will know you have reached a modem by the harsh sounds of the modem handshake.

5. When the BBS welcome screen appears in the HyperTerminal window, type your first name, last name, and password following the prompts. If you are a first-time caller, the BBS asks if your name is spelled correctly. If you answer Y, a questionnaire appears. You must complete the questionnaire to use the BBS on your first call.

6. Press ENTER until the Main Menu appears. From the Main Menu you have access to two areas: the Files Menu and News. For help with menu commands, type ?.

7. In the Main Menu, type F and press ENTER to access the Files Menu, then type D and press ENTER to download.

8. At the prompt, if you have Microsoft Word 6.0 or later, type register.doc and press ENTER twice. If you do not have Microsoft Word, type register.txt and press ENTER twice.

9. Type X and press ENTER to select the Xmodem transfer protocol.

10. To begin the download in Terminal, click Transfers, then click Receive binary

file. Next, select the destination directory, type the file name (register.doc or register.txt), and click OK. If the download fails, your baud rate may be set too

high. Log off, set the COM port baud rate lower, and call again.

11. To log off the BBS, press ENTER, type G for “good-bye,” then press ENTER twice again.

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MultiModemDSVD User Guide

Step 6: Send a Fax

To test your modem’s fax capabilities, send the completed registration file that you downloaded in “Step 6: Call the Multi-Tech BBS” to Multi-Tech or to a fax machine in your office.

Trio Fax

1. Depending on which version of the registration file you downloaded, use either Microsoft Word or NotePad to open the registration file.

2. Fill out the registration form and save the file, but do not exit.

3. Select Print from the File menu.

4. In the Name box of the Print dialog box, select Trio DataFax, and then click OK. After a short pause, the Trio Send Fax dialog box opens.

5. If you are sending the registration form to your own fax machine or to another fax modem in your office, under Temporary recipient, type the destination name and phone number in the Name and Number boxes.

If you are sending the registration form to our offices, type Multi-Tech Systems in the Company box, and 612 785-9874 in the Number box.

Microsoft Fax

6. Click Next Dialog.

7. Select a cover sheet, and then click Next Dialog.

8. Type a cover sheet message, and then click Next Dialog. A preview window opens.

9. If the fax looks correct, click Send. A dialog box appears that shows the progress of the fax transmission.

10. When transmission is complete, exit Word or Notepad.

Microsoft Fax is installed in Windows 95 as part of the Microsoft Exchange option. To install it under Windows 98, you must locate the \tools\oldwin95\message\us folder on the Windows 98 compact disc. Then, double-click on Wms.exe to install Windows Messaging. Once you’ve installed Windows Messaging, double-click on Awfax.exe to add Microsoft Fax to Windows Messaging.

You can use Microsoft Fax either as a stand-alone fax program or to fax from within another application. In the following procedure you will test your fax modem by running Microsoft Fax as a stand-alone fax program.

1. Depending on which version of the registration file you downloaded, use either Microsoft Word or NotePad to open the registration file.

2. Fill out the registration form.

3. Save the file and exit Word or NotePad.

4. Select Start | Programs | Accessories | Fax | Compose new fax.

5. The Compose New Fax wizard appears. Click Next.

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2 Quick Start

6. If you are sending the registration form to your own fax machine or to another fax modem in your office, type the destination name and phone number in the To and Fax # boxes.

If you are sending the registration form to our offices, type Multi-Tech Systems in the To box, and 612 785-9874 in the Fax # boxes.

7. Click Add to list, then click Next.

8. Pick a cover page, then click Next.

9. Type a subject line (e.g., MT5600DSVD2 registration) and a note to go on the cover page, then click Next.

10. Click Add file. In the Open a file to attach dialog box, select the registration file and click Open. The registration file is added to the Files to send list box.

11. Click Next, then click Finish.

12. Microsoft Fax opens the registration file in Word or NotePad, prints it to the rendering system, then dials the recipient and sends the fax.

13. Exit Microsoft Fax when the Status dialog box says the fax has been successfully sent.

Other Ways to Access Microsoft Fax

• In a Windows 3.1x or Windows 9x application, select Print from the File menu, then select Microsoft Fax as the default printer.

• In a Windows 9x application, select Send from the File menu.

• In Microsoft Exchange, select Compose, then select New fax.

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MultiModemDSVD User Guide

Voice Operation

Operation in DSVD mode enables data transfer and voice conversation to occur simultaneously during a data connection. On a DSVD call, an ordinary telephone connected to the modem is used as the voice interface. Both local and remote modems must have compatible DSVD technology to support the DSVD function.

To use DSVD, you must first establish a V.34/V.42 data connection between compatible DSVD modems. Once the connection is established, all that is needed to initiate a conversation is for either party to pick up the phone. The caller hears a ring over the phone, just like an ordinary call. On the other end, the modem makes a ringing sound through its onboard speaker. If the phone at that end is not picked up, eventually the caller hears a busy signal. When the modem is turned on but not in DSVD mode, the phone can be used to make ordinary phone calls.

You can control DSVD either by running a communication program that supports DSVD, such as the program included with the modem, or by manually issuing AT commands to the modem as described in the following sections.

To Turn On DSVD Mode

1. In the terminal window of your communication application, type AT and press ENTER. The modem responds OK.

2. Type AT-SMS=1 and press ENTER to turn on DSVD mode, or type AT-SMS=3 and press ENTER to turn on automatic mode select.

To Turn Off DSVD Mode

1. In the terminal window of your communication application, type AT and press ENTER. The modem responds OK.

2. Type AT-SMS=0 and press ENTER to turn off DSVD mode.

To Originate a DSVD Call

1. In the terminal window of your communication application, type AT and press ENTER. The modem responds OK.

2. Type AT&F and press ENTER to reset the modem to its default configuration. This action ensures that the modem is in automatic DSVD mode.

3. To dial, type ATDTnnnnnnn and press ENTER, where nnnnnnn is the phone number of a remote DSVD modem.

4. When you see a CONNECT response on your terminal, you can pick up the phone and talk to the remote user while simultaneously sending data to the remote modem.

5. To hang up, type +++ATH and press ENTER.

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

To Answer a DSVD Call

1. In the terminal window of your communication application, type AT and press ENTER. The modem responds OK.

2. Type AT&F and press ENTER to reset the modem to its default configuration. This action ensures that the modem is in automatic DSVD mode.

3. When the modem responds by displaying RING on the screen, type ATA and press ENTER to answer the call.

4. When you see a CONNECT response on your terminal, you can pick up the phone and talk to the remote user while simultaneously receiving data from the remote modem.

2 Quick Start

References

5. To hang up, type +++ATH and press ENTER.

The World Wide Web is an excellent source of information about modems in general and modem installation, configuration, and troubleshooting in particular. The following Web sites are good places to start:

• Costmo’s Other Resources Page:

http://modems.rosenet.net/

• Curt’s High Speed Modem Page:

http://elaine.teleport.com/~curt/modems.html

• Data Communications FAQ:

http://www.best.com/~malch/comfaq.html

• Multi-Tech Systems, Inc.:

http://www.multitech.com/

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MultiModemDSVD User Guide

Page 27

Features

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MultiModemDSVD User Guide

What Can You Do with Your Modem?

Your Multi-Tech MultiModemDSVD is the gateway to the exciting world of telecommunications.

You can use it to access commercial online information services such as CompuServe, America Online, Genie, and Prodigy; or the Internet. Like the commercial online services, the Internet provides e-mail services, public message areas, and access to information and software, much of it easily accessed through the World Wide Web.

Other uses include direct links to colleagues, to banks, and to service bureaus. You can also telecommute with your fax modem—work at home while communicating with the office by modem or fax, for you can use your modem to exchange faxes with any fax machine in the world, enabling you to communicate quickly with businesses and organizations that do not have direct modem communications.

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.

Required Equipment

In addition to the contents of your modem package, you need the following equipment.

Computer

Your modem can be connected to any computer with an RS-232/V.24 serial port, such as most PCs. It can also be connected to the RS-422 serial ports on Apple Macintosh computers.

To use the modem at its highest speeds, a PC must have either of the following:

• A serial port with a 16550AFN UART

• A Multi-Tech ISI (Intelligent Serial Interface) card, such as the ISI551 (single

port), ISI552 (dual port), or ISI608 (8 ports)

These devices can handle serial port rates up to 115,200 bps, which is sufficient for all uploads and most 56K downloads. For downloading highly compressible files at 56K speeds, however, your serial port should be capable of speeds to 230,400 bps.

Serial Cable

To connect the modem to your computer, you must provide a shielded serial cable, obtainable at computer stores and many office supply stores. The cable should have a male DB-25 connector at the modem end. For PCs, the other end may have a male DB-25 connector or a female DB-9 connector, depending on your particular computer and whether you are using the COM1 or the COM2 serial port.

Most Macintosh computers require a round, 8-pin, mini-DIN connector. The Macintosh serial cable should be wired for hardware flow control.

Page 29

Telephone Line

You must have a telephone line with a jack (connector) that accepts the cable that comes with the modem. If you do not have a telephone jack near your computer, you should install one before proceeding.

In North America, do-it-yourself telephone extension kits and accessories are available wherever telephones are sold. You may also hire an independent contractor or your local telephone company to install an extension. If you want a separate line for your fax modem, you must contact your telephone company.

Communications Software

To operate your modem, you must have a data, fax, and voice communication program, such as the one included with your modem. Communication software simplifies control of the modem by guiding you through the process of selecting your serial port, your port speed, and other variables, and then storing your settings, including frequently called phone numbers, so they can be recalled with the stroke of a key or the click of a mouse. Communication software must be set up, or configured, before you can use it.

3 Features

Connections

To use your modem, you must connect it to your computer (“RS232”), to a telephone line (“LINE”), to a telephone (“PHONE”), and to a power source (“PWR”).

PWR RS232 PHONE LINE

Figure 3-1. Power and communications connectors.

Connecting to the Computer (“RS232”)

Using a matching serial cable, connect the RS232 connector on the modem to one of the serial port connectors on the back of your computer. On a PC, there are usually two serial ports named “COM1” and “COM2.” COM1 typically uses a DB-9 connector, whereas COM2 may use a DB-25 connector. Most Apple Macintosh computers use round mini-DIN-8 connectors for the serial ports. Choose the one marked with the icon of a telephone; the Macintosh gives priority to that port and will not interrupt your communications link. Be sure to tighten the mounting screws on the DB connectors.

Connecting to the Telephone Line (“LINE”)

Plug one end of the cable provided with the modem into the telephone jack in your home or office. Plug the other end into the LINE jack on the modem.

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MultiModemDSVD User Guide

Note: The LINE jack is not interchangeable with the PHONE jack. Do not plug the telephone into the LINE jack or the line cable into the PHONE jack.

Note: The Federal Communications Commission (FCC), Industry Canada, the British Approvals Board for Telecommunications (BABT), and other regulatory agencies impose certain restrictions on equipment connected to public telephone systems. See Appendix A for more information.

Connecting to a Telephone Set (“PHONE”)

To use DSVD with your modem, plug an ordinary telephone into the modem’s modular PHONE jack.

Note: The PHONE jack is not interchangeable with the LINE jack; do not plug the telephone into the LINE jack or the line cable into the PHONE jack.

Connecting to Power (“PWR”)

Low voltage DC power is supplied to the modem through a modular power supply. Plug the power supply module into a convenient AC power outlet or surge protector. Plug the connector on the other end of the power cord into the PWR jack on the modem. A power ON/OFF switch is located on the right side of the modem.

Note: Use only the power supply supplied with the modem. Use of any other power supply will void the warranty and could damage the modem.

As soon as you apply power to the modem, it performs a diagnostic self-test, indicated by the speed LEDs flashing in sequence for approximately two seconds, after which the 56 indicator should light. If this does not happen, check that the power switch is on, the power supply is solidly connected, and the AC outlet is live.

Surge Protectors and Lightning

Power surges and other transient voltages on power lines, such as those caused by lightning strikes, can damage or destroy your modem. Therefore, we recommend that you plug the modem into a surge protector rather than directly into a wall outlet, preferably a surge protector that provides protection against electrical spikes on the telephone line as well as on the power line. Note that not even a surge protector can guard against damage from a nearby lightning strike. During an electrical storm, your safest course is to unplug your computer equipment from both the power outlet and the telephone line.

Page 31

Front Panel

3 Features

Figure 3-2. Front panel

The MultiModemDSVD has ten LED indicators on the front panel that indicate status, configuration, and activity:

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 RS232C/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 connects to an ISP server in K56flex or V.90 mode. The actual connection speed depends on server capabilities and line conditions.

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

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.

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 communication 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.

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MultiModemDSVD User Guide

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.

Page 33

AT Commands,

S-Registers &

Result Codes

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MultiModemDSVD User Guide

AT Commands

AT commands are used to control the operation of your modem. They are so called because each command must be preceded by the characters AT to get the ATtention of the modem.

AT commands can be issued only when the modem is in command mode or online command mode. The modem is in command mode whenever it is not connected to another modem. The modem is in data mode whenever it is connected to another modem and ready to 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 communication program, such as the HyperTerminal applet in Windows 95 and NT 4.0, or the Trio communications program included with your modem. You can issue commands to the modem either directly, by typing them in the terminal window of the communications program, or indirectly, by configuring the operating system or communications program to send the commands automatically. Fortunately, communication programs make daily operation of modems effortless by hiding the commands from the user. Most users, therefore, need to use AT commands only when reconfiguring the modem, e.g., to turn autoanswer on or off.

The format for entering an AT command is ATXn, where X is the command and n is the 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 separate the commands are optional; they are ignored by the command interpreter. The most familiar command string is the initialization string, which is used to configure the modem when it is turned on or reset, or when your communications software calls another modem.

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4 AT Commands, S-Registers, and Result Codes

AT Command Summary

Command: AT Attention Code Values: n/a Description: The attention code precedes all command lines except A/ and

the escape sequence.

Command: ENTER Key Values: n/a Description: Press the ENTER or RETURN key to execute most commands.

Command: A Answer Values: n/a Description: Answer an incoming call before the final ring.

Command: A/ Repeat Last Command Values: n/a Description: Repeat the last command string. Do not precede this command

with AT. Do not press ENTER to execute.

Command: B Values: n = 0 or 1 Default: 1 Description: B0 Select ITU-T V.22 mode when the modem is at 300 or 1200 bps.

Command: C Values: n = 1 Default: 1 Description: C0 Transmit carrier always off. (Not supported.)

Command: D Values: s = dial string (phone number and dial modifiers) Default: none Description: Dial telephone number s, where s may up to 40 characters long

Communication Standard Setting

B1 Select Bell 212A when the modem is at 300 or 1200 bps.

Carrier Control

C1 Normal transmit carrier switching (included for backward

compatibility with some software).

Dial

and include the following dial string modifiers. Spaces, parentheses, and hyphens are ignored.

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.

L Redial last number. (Must be placed immediately after

ATD.)

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

and subsequent dialing.

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

and subsequent dialing.

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MultiModemDSVD User Guide

Command: DS=yDial Stored Telephone Number Values: y = 0–3 Default: none Description: Dial a number previously stored in directory y by the &Zy=x

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. ; 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. Example: ATDS=3 dials the number in directory 3.

Command: E Values: n = 0 or 1 Default: 1 Description: E0 Do not echo keyboard input to the terminal.

Command: H Values: n = 0 or 1 Default: 0 Description: H0 Go on-hook (hang up) and terminate any &T test that is in

Command: I Values: n = 0–6 Default: None Description: I0 Display the product code. Example: 33600.

Echo Command Mode Characters

E1 Do echo keyboard input to the terminal.

Hook Control

progress.

H1 Go off-hook (make the phone line busy) and enter command

mode.

Information Request

I1 Calculate the ROM checksum and display the least significant

byte in decimal format.

I2 Calculate the ROM checksum and compare it to the prestored

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

I3 Display the controller firmware version (F), the basic model

(V90), the application code (A), and the interface type code (I) in the format 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_2M_DLS.

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4 AT Commands, S-Registers, and Result Codes

I4 Display the OEM-defined identifier string in either binary or

ASCII format. I5 Display the country code (e.g.: 022). I6 Display the modem data pump model and internal code version.

Command: L Values: n = 0, 1, 2, or 3 Default: 1 Description: L0 Select low volume.

Monitor Speaker Volume

L1 Select low volume. L2 Select medium volume. L3 Select high volume.

Command: M Values: n = 0, 1, 2, or 3 Default: 1 Description: M0 Speaker is always off.

Command: N

Values: n = 0 or 1 Default: 1 Description: N0 Disables automode. The modem attempts a handshake at the

Monitor Speaker Mode

M1 Speaker is on until the carrier signal is detected. M2 Speaker is always on when the modem is off-hook. M3 Speaker is off when receiving carrier and during dialing, but

on during answering.

Modulation Handshake

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

port speed. N1 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.

Command: O Values: 0 or 1 Default: None Description: O0 Exit online command mode and return to online data mode

Command: P Pulse Dialing Values: P, T Default: T Description: Configures the modem for pulse (non-touch-tone) dialing. Dialed

Return Online to Data Mode

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

+++AT<CR> escape sequence). O1 Exit online command mode and return to online data mode

after a retrain.

digits are pulsed until a T command or dial modifier is received.

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MultiModemDSVD User Guide

Command: Q Values: n = 0 or 1 Default: 0 Description: Q0 Enable result codes.

Command: S Values: r = S-register number Default: None Description: Selects register Sr as the last register accessed. E.g., S0. The

Command: Sr=nSet Register Value Values: r = S-register number; n varies Default: None Description: Set value of register Sr to n, where n is entered in decimal for-

Command: S Values: r = S-register number Default: None Description: Read value of register Sr and display it in 3-digit decimal for-

Result Codes Enable/Disable

Q1 Disable result codes.

Select Register

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.

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

written to the last accessed S-register.

? Read Register Value

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

used, the last accessed S-register is read.

Command: T Tone Dialing Values: P, T Default: T Description: Configures the modem for DTMF (touch-tone) dialing. Dialed

digits are tone dialed until a P command or dial modifier is

received.

Command: V Values: n = 0 or 1 Default: 1 Description: V0 Displays result codes as digits (terse response).

Command: W Values: n = 0, 1, or 2 Default: 0 Description: W0 The CONNECT result code reports the serial port speed. Other

Result Code Format

V1 Displays result codes as words (verbose response).

Connect Message Control

responses are disabled. W1 The CONNECT result code reports the line speed, the error

correction protocol, and the serial port speed, respectively.

Other responses are disabled. W2 The CONNECT result code reports the line speed only. Other

responses are disabled.

Note: See also the \V command

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4 AT Commands, S-Registers, and Result Codes

Command: X Values: n = 0–4 Default: 4 Description: This command selects which subset of the result messages will

Command: Y Values: n = 0 or 1 Default: 0 Description: Y0 Disable sending or responding to long space break signal on

Result Code Selection

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

commands. X0 Sends OK, CONNECT, RING, NO CARRIER, ERROR and NO

ANSWER; does not look for dial tone or busy signal. X1 Sends X0 messages and connect speed; does not look for dial

tone or busy signal. X2 Sends X1 messages with NO DIALTONE; does not look for

busy signal. X3 Sends X1 messages with BUSY; does not look for dial tone. X4 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.

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>.

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MultiModemDSVD User Guide

Voice Commands

The MultiModemDSVD uses DSVD technology to achieve simultaneous voice and data operation over a telephone line. Establishing a DSVD connection is like establishing 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 conversation. A connected telephone can be used for voice communication during DSVD mode.

In addition to the following commands, the MultiModemDSVD supports voice commands that are mainly of interest to developers. Information about those commands can be found in the Voice #V Commands Developer’s Kit, available on the Multi-Tech Web site at http://www.multitech.com/support/manuals/82039201.pdf.

Command: -SMS=nData/DSVD Mode Values: n = 0, 1, or 3 Default: 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.

Command: -SSE=nDSVD Enable/Disable Values: n = 0 or 1 Default: 0 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=nBaud Rate Select Values: n = 0–48 Default: 0 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.

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4 AT Commands, S-Registers, and Result Codes

Command: #CLS=nData, Fax, or Voice/Audio Select Values: n = 0, 1, 2, or 8 Default: 0 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 in the format XXXX-

XXXX-XXX YYY, where the X’s represent the part number and the Y’s represent the revision number.

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MultiModemDSVD User Guide

S-Registers

Certain modem values, or parameters, are stored in memory locations called Sregisters. Use the S command to read or to alter the contents of S-registers (see previous section).

S0 1 ring 0, 1–255 1 Sets the number of rings before the

S1 1 ring 0–255 0 Counts the rings that have occurred.

S2 decimal 0–127 43 (+) Sets ASCII code for the

S3 decimal 0–127 13 (^M) Sets the ASCII code for the carriage return

S4 decimal 0–127 10 (^J) Sets the ASCII code for the line feed

modem answers. ATS0=0 disables autoanswer completely.

128–255 escape sequence character. Values greater

than 127 disable escape.

character.

S5 decimal 0–32 8 (^H) Sets the ASCII code for the

33–127 backspace character. Values greater than

32 disable backspace.

S6 seconds 2–255 2 Sets the time the modem waits after it goes

off-hook before it begins to dial the telephone number.

S7 seconds 1–255 50 Sets the time the modem waits for a carrier

signal before aborting a call. Also sets the wait for silence time for the @ dial modifier, and the time the modem waits for the dial tone after encountering W in the dial string.

S8 seconds 0–255 2 Sets the length of a pause caused by a

comma character in a dialing command.

S9 100 ms 1–255 6 Sets the time, in tenths of a second, that

the carrier must be present before the modem considers it valid.

S10 100 ms 1–255 14 Sets how long a carrier signal must be lost

before the modem disconnects.

S11 1 ms 50–255 95 Sets spacing and duration of dialing tones.

S12 20 ms 0–255 50 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 sending of the OK result code to the computer. (Escape code guard time).

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4 AT Commands, S-Registers, and Result Codes

S18 seconds 0–255 0 Sets the length of time that the modem

conducts an &T test before returning 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 0 Sets the length of time that the modem

operates in normal mode with no detected telephone or serial port activity before entering low-power sleep mode. The timer is reset upon any serial port or telephone line activity.

S25 10 ms 0–255 5 Sets the length of time that the modem

ignores DTR while taking the action specified by &D.

S29 10 ms 0–255 70 Sets the length of time that the modem

goes on-hook when it encounters a flash dial modifier (!) in the dial string.

S30 10 ms 0, 1–255 0 Sets the length of time that the modem

waits before disconnecting when no data is sent or received. A value of zero disables the timer.

S32 decimal 0–255 17 Sets the ASCII code for the XON character.

S33 decimal 0–255 19 Sets the ASCII code for the XOFF character.

S35 decimal 0–1 0 0 disables, 1 enables the V.25 data calling

tone, which allows remote data/fax/voice discrimination.

S36 decimal 0–7 7 LAPM Failure Control. Specifies the

fallback 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 it the default value has been entered. (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.

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S37 decimal 0 0 Sets the maximum V.34 speed at which the

6 Reserved. 7 An MNP connection is attempted and,

if it fails, a normal modem connection

is established.

modem attempts to connect. Attempts 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 appropriate values). If N1 is active, connection 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 buffer 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 acknowledge 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 decimal 136, 138 138 Enables or disables data compression:

136 Error correction without compression. 138 Error correction with compression.

S48 decimal 0, 7, 128 7 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.

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4 AT Commands, S-Registers, and Result Codes

S86 decimal 0, 4, 5, 9, n/a When the modem issues a NO CARRIER

12, 13, 14 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. 4 Loss of carrier. 5 V.42 negotiation failed to detect an

error-correction modem at the other

end. 9 The modems could not find a common

protocol.

12 Normal disconnect initiated by the

remote modem.

13 Remote modem does not respond after

10 retransmissions of the same message.

14 Protocol violation.

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Result Codes

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

0OK Command executed 1 CONNECT Modem connected to line 2RING Ring signal detected 3 NO CARRIER Carrier signal lost or not detected 4 ERROR Invalid command 5 CONNECT 1200 Connected at 1200 bps 6 NO DIALTONE No dial tone detected 7 BUSY Busy signal detected 8 NO ANSWER No answer at remote end 9 CONNECT 0600 Connected at 600 bps 10 CONNECT 2400 Connected at 2400 bps 11 CONNECT 4800 Connected at 4800 bps 12 CONNECT 9600 Connected at 9600 bps 13 CONNECT 7200 Connected at 7200 bps 14 CONNECT 12000 Connected at 12000 bps 15 CONNECT 14400 Connected at 14400 bps 16 CONNECT 19200 Connected at 19200 bps 17 CONNECT 38400 Connected at 38400 bps 18 CONNECT 57600 Connected at 57600 bps 19 CONNECT 115200 Connected at 115200 bps 20 CONNECT 230400 Connected at 230400 bps 22 CONNECT 75TX/1200RX V.23 connection in originate mode 23 CONNECT 1200TX/75RX V.23 connection in answer mode 24 DELAYED Delay is in effect for the dialed number 32 BLACKLISTED Dialed number is blacklisted 33 FAX Connected in fax mode 35 DATA Connected in data mode 40 CARRIER 300 0-300 bps data carrier detected 44 CARRIER 1200/75 V.23 backward channel detected 45 CARRIER 75/1200 V.23 forward channel detected 46 CARRIER 1200 1200 bps data carrier detected 47 CARRIER 2400 2400 bps data carrier detected 48 CARRIER 4800 4800 bps data carrier detected 49 CARRIER 7200 7200 bps data carrier detected 50 CARRIER 9600 9600 bps data carrier detected 51 CARRIER 12000 12000 bps data carrier detected 52 CARRIER 14400 14400 bps data carrier detected 53 CARRIER 16800 16800 bps data carrier detected 54 CARRIER 19200 19200 bps data carrier detected 55 CARRIER 21600 21600 bps data carrier detected 56 CARRIER 24000 24000 bps data carrier detected 57 CARRIER 26400 26400 bps data carrier detected 58 CARRIER 28800 28800 bps data carrier detected 59 CONNECT 16800 Connected at 16800 bps 61 CONNECT 21600 Connected at 21600 bps

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4 AT Commands, S-Registers, and Result Codes

Terse Verbose Description

62 CONNECT 24000 Connected at 24000 bps 63 CONNECT 26400 Connected at 26400 bps 64 CONNECT 28800 Connected at 28800 bps 66 COMPRESSION CLASS 5 Connected with MNP Class 5 data compression 67 COMPRESSION V.42 bis Connected with V.42 bis data compression 69 COMPRESSION NONE Connected without data compression 70 PROTOCOL NONE Connected without any protocol 77 PROTOCOL LAPM Connected in V.42 LAPM mode 78 CARRIER 31200 56000 bps data carrier detected 79 CARRIER 33600 33600 bps data carrier detected 80 PROTOCOL ALT Connected in MNP mode 81 PROTOCOL ALT-CELLULAR Connected in MNP 10 mode 84 CONNECT 33600 Connected at 33600 bps 91 CONNECT 31200 Connected at 31200 bps 150 CARRIER 32000 32000 bps data carrier detected 151 CARRIER 34000 34000 bps data carrier detected 152 CARRIER 36000 36000 bps data carrier detected 153 CARRIER 38000 38000 bps data carrier detected 154 CARRIER 40000 40000 bps data carrier detected 155 CARRIER 42000 42000 bps data carrier detected 156 CARRIER 44000 44000 bps data carrier detected 157 CARRIER 46000 46000 bps data carrier detected 158 CARRIER 48000 48000 bps data carrier detected 159 CARRIER 50000 50000 bps data carrier detected 160 CARRIER 52000 52000 bps data carrier detected 161 CARRIER 54000 54000 bps data carrier detected 162 CARRIER 56000 56000 bps data carrier detected 165 CONNECT 32000 Connected at 32000 bps 166 CONNECT 34000 Connected at 34000 bps 167 CONNECT 36000 Connected at 36000 bps 168 CONNECT 38000 Connected at 38000 bps 169 CONNECT 40000 Connected at 40000 bps 170 CONNECT 42000 Connected at 42000 bps 171 CONNECT 44000 Connected at 44000 bps 172 CONNECT 46000 Connected at 46000 bps 173 CONNECT 48000 Connected at 48000 bps 174 CONNECT 50000 Connected at 50000 bps 175 CONNECT 52000 Connected at 52000 bps 176 CONNECT 54000 Connected at 54000 bps 177 CONNECT 56000 Connected at 56000 bps 180 CONNECT 28000 Connected at 28000 bps (V.90 mode) 180 CARRIER 28000 28000 bps data carrier detected (V.90 mode) 181 CONNECT 29333 Connected at 29333 bps (V.90 mode) 181 CARRIER 29333 29333 bps data carrier detected (V.90 mode) 182 CONNECT 30667 Connected at 30667 bps (V.90 mode) 182 CARRIER 30667 30667 bps data carrier detected (V.90 mode) 183 CONNECT 33333 Connected at 33333 bps (V.90 mode) 183 CARRIER 33333 33333 bps data carrier detected (V.90 mode) 184 CONNECT 34667 Connected at 34667 bps (V.90 mode) 184 CARRIER 34667 34667 bps data carrier detected (V.90 mode)

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Terse Verbose Description

185 CONNECT 37333 Connected at 37333 bps (V.90 mode) 185 CARRIER 37333 37333 bps data carrier detected (V.90 mode) 186 CONNECT 38667 Connected at 38667 bps (V.90 mode) 186 CARRIER 38667 38667 bps data carrier detected (V.90 mode) 187 CONNECT 41333 Connected at 41333 bps (V.90) 187 CARRIER 41333 41333 bps data carrier detected (V.90) 188 CONNECT 42667 Connected at 42667 bps (V.90) 188 CARRIER 42667 42667 bps data carrier detected (V.90) 189 CONNECT 45333 Connected at 45333 bps (V.90) 189 CARRIER 45333 45333 bps data carrier detected (V.90) 190 CONNECT 46667 Connected at 46667 bps (V.90) 190 CARRIER 46667 46667 bps data carrier detected (V.90) 191 CONNECT 49333 Connected at 49333 bps (V.90) 191 CARRIER 49333 49333 bps data carrier detected (V.90) 192 CONNECT 50667 Connected at 50667 bps (V.90) 192 CARRIER 50667 50667 bps data carrier detected (V.90) 193 CONNECT 53333 Connected at 53333 bps (V.90) 193 CARRIER 53333 53333 bps data carrier detected (V.90) 194 CONNECT 54667 Connected at 54667 bps (V.90) 194 CARRIER 54667 54667 bps data carrier detected (V.90) +F4 +FCERROR V.21 signal received/high speed fax expected

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

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Solving

Problems

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Introduction

Your modem was thoroughly tested at the factory before it was shipped. If you are unable to make a successful connection, or if you experience data loss or garbled characters during your connection, it is possible that the modem is defective. However, it is more likely that the source of your problem lies elsewhere. The following symptoms are typical of problems you might encounter:

• None of the LEDs light when the modem is on.

• The modem does not respond to commands.

• The modem dials but is unable to make a connection.

• The modem disconnects while online.

• The modem cannot connect when answering.

• File transfer is slower than it should be.

• Data is being lost.

• There are garbage characters on the monitor.

• The modem doesn’t work with Caller ID.

• Fax and data software can’t run at the same time.

If you experience problems, please check the following possibilities before calling Technical Support (see Appendix D).

None of the Indicators Light

When you turn on the modem, the LED indicators on the front panel should flash briefly as the modem runs a self-test. If the LEDs remain off, the modem is probably not receiving power.

Make sure the modem’s power switch is on, especially if you normally turn on the modem by turning on a power strip.

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.

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5 Solving Problems

The Modem Does Not Respond to Commands

Make sure the modem is plugged in and turned on. (See “None of the Indicators Light.”)

Make sure you are issuing the modem commands from the data communications software, either manually in terminal mode or 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 ENTER. 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 Windows 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 automatically. Some connect when the software loads and remain connected until the program terminates. Others can disconnect without exiting the program. The modem’s TR indicator lights to show that the software has taken control of the modem through the COM port.

Your communications software settings may not match the physical port the modem is connected to. The serial cable might be plugged into the wrong connector—check your computer documentation to make sure. Or you might have selected a COM port in your software other than the one the modem is physically connected to—compare the settings in your software to the physical connection.

If the modem is on, the cable is plugged into the correct port, the communications software is configured correctly, and you still don’t get an OK, the fault might be in the serial cable. Make sure it is firmly connected at both ends.

Is this the first time you have used the cable? If so, it may not be wired correctly. Check the cable description on the packaging to make sure the cable is the right one for your computer.

Peripheral expansion cards, such as sound and game cards, might include a serial port preconfigured as COM1 or COM2. The extra 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.

To look for address or IRQ conflicts if you use Windows 3.1x, select File | Run in Program Manager, type MSD, and press ENTER. Then select Mouse, COM Ports, and IRQ Status and note the addresses and IRQs that are in use. If you find an IRQ conflict, note which IRQs are not being used, then change one of the conflicting devices to use one of the unused IRQs. If you find an address conflict, change the address of one of the conflicting devices.

To change a port address or IRQ in Windows 3.1x, double-click the Control Panel icon, then the Ports icon. Click on the port you want to change, click Settings,

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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.

If you use Windows 95, right-click on My Computer, select Properties from the menu, click on the Device Manager tab, double-click on Ports, then double-click on the communications port your modem is connected to. In the port’s Proper- ties sheet, click on the Resources tab to see the port’s input/output range and interrupt request. If another device is using the same address range or IRQ, it will appear in the Conflicting Device List. Uncheck Use automatic settings to change the port’s settings so they do not conflict with the other device, or select the port the conflicting device is on and change it instead. If you need to open your computer to change switches or jumpers on the conflicting device; refer to the device’s documentation.

The serial port might be defective. If you have another serial port, install the modem on it, change the COM port setting in your software, and try again.

The modem might be defective. If you have another Multi-Tech modem, try swapping modems. If the problem goes away, the first modem is possibly defective. Call Tech Support for assistance (see Appendix D).

The Modem Dials But Cannot Connect

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 result 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).

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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 95 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 person 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.

The Modem Disconnects While Online

If you have Call Waiting on the same phone line as your modem, it can interrupt your connection when someone tries to call you. If you have Call Waiting, disable it before each call. In most telephone areas in North America, you can disable Call Waiting by preceding the telephone number with *70 (check with your local telephone company).

You can automatically disable Call Waiting by including the disabling code in the modem’s dial prefix (e.g., ATDT*70,—note the comma, which inserts a pause before the number is dialed). To change the dial prefix in Windows Terminal, select Settings | Modem Commands. To change it in Windows 95 HyperTerminal, select Connect from the Call menu, click Dialing Properties, check This location has Call Waiting, and select the correct code for your phone service.

If you have extension phones on the same line as your modem, you or someone else can interrupt the connection by picking up another phone. If this is a frequent problem, disconnect the extension phones before using the modem, or install another phone line especially for the modem.

Check for loose connections between the modem and the computer, the telephone jack, and AC power.

You might have had a poor connection because of line conditions or the problem might have originated on the other end of the line. Try again.

If you were online with a BBS or an online service like CompuServe, it might have hung up on you because of lack of activity on your part or because you exceeded your time limit for the day. Try again.

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The Modem Cannot Connect When Answering

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 Transfer Is Slower Than It Should Be

You might have an older UART. For best throughput, install a 16550AFN UART or a Multi-Tech ISI serial port card. See the “Quick Start” chapter for information on how to identify your UART.

If you are running under Windows 3.1 and have a 16550AFN UART, you must replace the Windows serial driver, COMM.DRV, to take full advantage of the UART’s speed.

If you are using a slow transfer protocol, such as Xmodem or Kermit, try Zmodem or Ymodem/G instead.

Is your line noisy? If there is static on your line, the modem has to resend many blocks of data to insure accuracy. You must have a clean line for maximum speed.

Are you downloading a compressed file with MNP 5 hardware compression enabled? Since hardware data compression cannot compress a file already compressed by an archiving program, the transfer can be marginally slower with data compression enabled than with it disabled.

Does your Internet service provider (ISP) use the same 56K protocol as your modem? 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, and check the MultiTech Web site for the latest developments in V.90.

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.

Data Is Being Lost

If you are using data compression and a high speed serial port, set the serial port baud rate to four times the data rate.

Your UART might not be reliable at serial port speeds over 9600 bps or 19,200 bps. Turn off data compression, reset your serial port speed to a lower rate, or replace your serial port with a faster one.

Make sure the flow control method you selected in software 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.

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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 driver, 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.

There Are Garbage Characters on the Monitor

Your computer and the remote computer might be set to different word lengths, stop bits, or parities. If you have connected at 8-N-1, try changing to 7-E-1, or vice-versa, using your communications software.

You might be experiencing line noise. Enable error correction, if it is disabled, or hang up and call again; you might get a better connection the second time.

At speeds above 2400 bps, the remote modem might not use the same transmission or error correction standards as your modem. Try 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.

The Modem Doesn’t Work with Caller ID

Caller ID information is transmitted between the first and second rings, so if autoanswer is turned off (S0=0) or if the modem is set to answer after only one ring (S0=1), the modem will not receive Caller ID information. Check your 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.

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

Communications devices can be accessed by only one application at a time. Under DOS or Windows 3.1x, you can run either your fax software or your datacomm software, but not both at the same time, unless you have a special communications device management application. In Windows 95, 98, and NT 4.0, you can have data and fax communication applications open at the same time, but they cannot use the same modem at the same time.

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Appendixes

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Appendix A: Regulatory Compliance

FCC Part 68 Telecom

1. This equipment complies with part 68 of the Federal Communications Commission 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 network or premises wiring using a compatible modular jack that is Part 68 compliant. See installation instructions for details.

4. The ringer equivalence number (REN) is used to determine the number of devices 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 required. 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 complaint with the FCC if you believe it is necessary.

6. The telephone company may make changes in its facilities, equipment, operations, or procedures that could affect the operation of the equipment. If this happens, the telephone company will provide advance notice in order for you to make 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 telephone 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.

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

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Manufacturer: Multi-Tech Systems, Inc. Trade Name MultiModemDSVD Model Number: MT5600DSVD2 FCC Registration No: AU7USA-24713-M5-E Ringer Equivalence: 0.3B Modular Jack (USOC): RJ11C or RJ11W (single line)

Service Center in USA: Multi-Tech Systems, Inc.

Fax Branding Statement

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 message unless such message clearly contains the following information:

• Date and time the message is sent

A Regulatory Compliance

2205 Woodale Drive Mounds View, MN 55112 (763) 785-3500 (763) 785-9874 Fax

• 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.

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Canadian Limitations Notice

Notice: The ringer equivalence number (REN) assigned to each terminal device provides an indication of the maximum number of terminals allowed to be connected to a telephone interface. The termination on an interface 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 certification means that the equipment meets certain telecommunications network protective, operational and safety requirements. The Industry Canada label does not guarantee the equipment will operate to the user’s satisfaction.

Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of the local telecommunications company. The equipment must also be installed using an acceptable method of connection. The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations. Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier. Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment.

Users should ensure for their own protection that the electrical ground connections of the power utility, telephone 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.

International Modem Restrictions

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 become non-compliant.

Commission Decision CTR21

The equipment has been approved to Commission Decision CTR21 for pan-European single terminal connection to the public switched telephone network (PSTN). However, due to differences between the individual PSTNs provided in different countries, the approval does not, of itself, give an unconditional assurance of successful operation on every PSTN network termination point. In the event of problems, you should contact your equipment supplier in the first instance.

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EMC and Safety Compliance

The CE mark is affixed to the enclosed MultiTech product to confirm compliance with the following European Community Directives:

• Council Directive 89/336/EEC of 3 May 1989 on the approximation of the laws of Member States relating to electromagnetic compatibility;

and

• Council Directive 73/23/EEC of 19 February 1973 on the harmonization of the laws of Member States relating to electrical equipment designed for use within certain voltage limits;

and

• Council Directive 98/13/EC of 12 March 1998 on the approximation of the laws of Member States concerning telecommunications terminal and Satellite earth station equipment.

New Zealand Telecom Warning Notice

A Regulatory Compliance

Use of pulse dialing, when this equipment is connected to the same line as other equipment, may give rise to ‘bell tinkle’ or noise and may also cause a false answer condition. Should such problems occur, the user should NOT contact the Telecom Faults Service.

The preferred method of dialing is to use DTMF tones, as this is faster than pulse (decadic) dialing and is readily available on almost all New Zealand telephone exchanges.

Warning Notice: No '111' or other calls can be made from this device during a mains power failure.

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B Technical Specifications

Appendix B: Technical Specifications

Your MultiModemDSVD modem meets the following specifications:

Trade Name MultiModemDSVD™

Model Number MT5600DSVD 2

Server-to-Client K56flex or V.90 speeds when accessing an ISP type K56flex Data Rates or V.90 server (actual speed depends on server capabilities

and line conditions) *

Client-to-Client 33,600, 31,200, 28,800, 26,400, 24,000, 21,600, 19,200, 16,800, Data Rates 14,400, 12,000, 9600, 7200, 4800, 2400, 1200, 0-300 bps

Fax Data Rates 14,400, 9600, 7200, 4800, 2400, 300 bps

Data Format 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.29, V.42, V.42bis; ITU-T V.21 & V.23 in international versions

Fax Compatibility ITU-T Group 3, Class 1 and 2, T.4, T.30, V.21, V.27ter, V.29,

V.17, and TIA/EIA TR29.2

Voice Compatiblity ITU-T V.70 DSVD

Error Correction ITU-T V.42 (LAP-M or MNP 3–4)

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

Speed Conversion 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 answer; 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; keyboard-controlled modem options; non-volatile memory; onscreen 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.

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Data Modulation FSK at 300 bps, PSK at 1200 bps, QAM at 2400, 4800, and

Fax Modulation V.21 CH2 FSK at 300 bps (half duplex)

Carrier Frequencies 1600, 1646, 1680, 1800, 1829, 1867, 1920, ITU-T V.34 1959, 2000 Hz

Carrier Frequencies 1800 Hz AT&T V.32 terbo/ ITU-T V.32bis/V.32

Carrier Frequencies Transmit originate: 1200 Hz

V.22bis/V.22 or Transmit answer: 2400 Hz Bell 212A Standard Receive originate: 2400 Hz (2400 & 1200 bps) Receive answer: 1200 Hz

Carrier Frequencies Transmit originate: 390 Hz mark

ITU-T V.23 450 Hz space (1200 bps) Receive originate: 1300 Hz mark

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

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

2100 Hz space

Transmit answer: 1300 Hz mark

2100 Hz space

Receive answer: 390 Hz mark

450 Hz space

Carrier Frequencies Transmit originate: 980 Hz mark

ITU-T V.21 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 Transmit originate: 1270 Hz mark

Bell 103/113 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 V.21 Ch2 (half duplex): Frequencies 1650 Hz mark, 1850 HZ space for transmit

originate 1650 HZ mark, 1850 Hz space for transmit answer V.27ter: 1800 Hz originate/answer V.29 QAM: 1800 Hz originate/answer V.17 TCM: 1800 Hz originate/answer

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B Technical Specifications

Voice Compression PCM 128, 8000 Hz, or IMA ADPCM, 8000 Hz, (selectable and Sampling Rate via #V commands). Note that your computer system should

have a processing speed of at least 75 MHz to take full advantage of the telephony features of this product.

Transmit Level -11 dBm (dial-up)

Frequency Stability ±0.01%

Receiver Sensitivity -43 dBm under worst-case conditions

AGC Dynamic Range 43 dB

Interface EIA RS-232C/ITU-T V.24/V.28

Connectors DB25 RS-232C connector; two RJ-11 phone jacks, and power

jack.

Cables One 14-foot 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 Power-on self test, local analog loop, local digital loop, re-

mote digital loop.

Indicators 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 ON/OFF power switch

Environmental 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 9 VDC, 300 mA maximum transformer output

Dimensions 10.8 cm wide x 14.8 cm long x 2.9 cm high (4.25" x 5.8" x

1.15")

Weight 224 g (8 oz)

Limited Warranty 10 years in the U.S.A., U.K., Canada, and Mexico; 5 years

elsewhere

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Appendix C: Loopback Tests

Introduction

Each time you turn on your modem, it performs an automatic self-test to ensure proper operation. Your modem also has three diagnostic tests: local analog loopback, remote digital loopback, and local digital loopback. These ITU-T V.54 loopback tests isolate telephone circuit and transmission problems.

In a loopback test, data from your computer loops through the circuits of your modem and/or a remote modem before it appears on your monitor. When the loop has been completed, the data on your PC’s monitor should match the original data.

The local analog loopback test allows you to verify that the modem’s transmitter and receiver circuits are functioning properly.

The local digital loopback allows you to verify that the local computer or terminal, the two modems, and the transmission line between them are functioning properly.

The remote digital loopback test allows you to verify that the remote computer or terminal, the remote modem, the serial ports, the telephone line, and the local modem are functioning properly.

C Loopback Tests

Note: All loopback tests operate at all speeds except 300 bps.

Local Analog Loopback Test (V.54 Loop 3)

In this test, data from your computer or terminal is sent to your modem’s transmitter, converted into analog form, looped back to the modem’s receiver, converted into digital form, and then sent to your monitor for verification. No connection to the phone line is required.

AT&T1 CONNECT UUUUUUUUU UUU

Digital Analog

Computer or Terminal Local MultiModem

Figure C-1. Local analog loopback test.

Test procedure

1. Connect the modem to your computer. Using your communication program, set the desired baud rate and go into terminal mode.

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2. Type AT&T1 and press ENTER. This places your modem in analog loopback mode in the originate mode. A CONNECT message should appear on your dis- play. The modem is now out of command mode and in a pseudo-online mode.

3. Note that the CD LED is on. If you are set for 14,400 bps or higher, a speed LED should be on. If the CD LED is not on, there is a defect in your modem.

4. Enter characters from your keyboard. For this test, typing multiple uppercase U characters is a good way to send an alternating test pattern of binary ones and zeros. The characters entered should be displayed on your monitor. The TD and RD LEDs should flash when a character is entered.

5. To exit the test, type the escape sequence +++AT and press ENTER. This puts the modem in online command mode. Then type either AT&T or ATH to return to command mode.

6. Your modem passes this test if the data received on your monitor are the same as the data entered from your keyboard. If different data appear on your monitor, your modem is probably causing the problem, though it could also be your computer. If your modem passes this test, but you are receiving errors while on line, the remote modem or the phone line could be at fault.

Remote Digital Loopback Test (V.54 Loop 2)

The remote digital loopback test tests the phone lines and the circuits of both your modem and a remote modem. In this test, your modem must be on line with another modem that is set up to respond to a request for remote digital loopback. (Note that some modems might not support remote digital loopback or might have it disabled.) Data from your computer or terminal is transmitted through your modem and over the phone line to the remote modem, where it is then looped back to your modem.

AT&T6 OK UUUUUUUUU UUUUU

Digital Analog DigitalAnalog

Computer or Terminal Local MultiModem Remote MultiModem Computer or Terminal

Figure C-2. Remote digital loopback test.

Test procedure

AT&T6 OK

1. Arrange to have &T6 set on the remote test modem.

2. Open your communications software and go into terminal mode. Type AT and press ENTER; you should get an OK message. Type AT\N and press ENTER to disable error correction.

3. Dial the remote modem and establish your online connection.

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C Loopback Tests

4. Type the escape sequence +++AT and press ENTER to bring your modem into online command mode.

5. Type AT&T6 and press ENTER. The local modem responds to this command by transmitting an unscrambled marking signal, which causes the remote modem to place itself in digital loopback mode. Then the local modem exits online command mode and enters data mode.

6. Enter data from your keyboard. For this test, typing multiple uppercase U characters is a good way to send an alternating test pattern of binary ones and zeroes. Data received by the remote modem enters its analog receiver, is converted to digital data, is reconverted into analog, and then is transmitted back to your modem. Your modem passes this test if the data received on your monitor is the same as the data entered from your keyboard.

7. To exit the test, type the escape sequence +++AT and press ENTER. This puts the modem in online command mode. The modem should respond with an OK message. If you wish to stay on line with the remote modem for normal data transmission, type AT&T and press ENTER to exit the test, then type ATO and press ENTER to return on line. If you wish to terminate the call, type ATH and press ENTER to hang up.

Local Digital Loopback Test (V.54 Loop 2)

The local digital loopback test is identical to the remote digital loopback test with one exception. Instead of using your modem to signal a remote modem to place itself in digital loopback mode, your modem is placed in digital loopback mode while the remote modem is not. Data is entered and transmitted from the remote modem, sent across the phone line to your modem, and looped back to the remote modem.

AT&T3 OK

Digital Analog DigitalAnalog

Computer or Terminal Local MultiModem Remote MultiModem Computer or Terminal

Figure C-3. Local digital loopback test

Test procedure

1. Open your communications software and go into terminal mode. Type AT and press ENTER; you should get an OK message. Type AT\N and press ENTER to disable error correction.

UUUUUUUUU UUUUU

2. Dial the remote modem and establish your online connection.

3. Type the escape sequence +++AT and press ENTER to bring your modem into online command mode.

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4. Type AT&T3 and press ENTER. Once you receive an OK message from your modem (if responses are enabled), your modem is placed in digital loopback mode.

5. Have someone enter data from the remote keyboard. For this test, typing multiple uppercase U characters is a good way to send an alternating test pattern of binary ones and zeros. The data received by your modem enters its analog receiver, is converted to digital data, is reconverted into analog, and then is transmitted back to the remote modem. Your modem passes this test if the data received on the remote monitor is the same as the data entered from the remote keyboard.

6. To exit the test, type the escape sequence +++AT and press ENTER. This puts the modem in online command mode. The modem should respond with an OK message. If you wish to stay on line with the remote modem for normal data transmission, type AT&T and press ENTER to exit the test, then type ATO and press ENTER to return on line. If you wish to terminate the call, type ATH and press ENTER to hang up.

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D Warranty, Service, and Technical Support

Appendix D: Warranty, Service, and

Technical Support

Limited Warranty

Multi-Tech Systems, Inc. (MTS) warrants that this product will be free from defects in material or workmanship for a period of ten years from the date of purchase or, if date of purchase is not provided, ten years from the date of shipment (limited to customers in the U.S., Canada, Mexico, and United Kingdom). For customers in all other countries, due to certain legal restrictions, MTS warrants that this product will be free from defects in material or workmanship for a period of five years from the date of purchase or, if date of purchase is not provided, five years from the date of shipment, unless otherwise limited or prohibited by law.

MTS MAKES NO OTHER WARRANTY, EXPRESSED OR IMPLIED, AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED.

This warranty does not apply to any products that have been damaged by lightning storms, water, or power surges, or that have been neglected, altered, abused, used for a purpose other than the one for which they were manufactured, repaired by the customer or any party without MTS’s written authorization, or used in any manner inconsistent with MTS’s instructions.

MTS’s entire obligation under this warranty shall be limited (at MTS’s option) to repair or replacement of any products that prove to be 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 with transportation prepaid.

MTS WILL NOT BE LIABLE FOR CONSEQUENTIAL DAMAGES AND UNDER NO CIRCUMSTANCES WILL ITS LIABILITY EXCEED THE PURCHASE PRICE FOR DEFECTIVE PRODUCTS.

Service

If you are outside the USA, your local distributor of Multi-Tech products usually offers the quickest and most economical repair option. If necessary, you may send your modem to our Mounds View factory in the USA. A modem that is shipped to us from outside the USA must have a Returned Materials Authorization (RMA) and shipping instructions. To return a modem for repair from inside the USA, no RMA is required; simply send it to us freight prepaid. Include a description of the problem, a return shipping address, and a check or purchase order for out-of-warranty repairs.

Please send modems that require repairs to the following address:

Multi-Tech Systems, Inc. 2205 Woodale Drive Mounds View, MN 55112

Attn: Repair

If you are shipping from outside the USA, please contact our Repair Department for an RMA prior to your shipment. You can contact us by telephone at +763 785-3500 or by fax at +763 785-9874.

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Technical Support

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 612 785-3500 (international and local). Please have modem information available. You can also contact Technical Support by e-mail at:

tsupport@multitech.com

Online Warranty Registration

If you have access to the World Wide Web, you can register your Multi-Tech product online at the following URL:

http://www.multitech.com/register/

The Multi-Tech BBS

For customers who do not have Internet access, Multi-Tech maintains a bulletin board system (BBS) that mirrors its FTP site. Information available from the BBS includes new product information, product upgrade files, and problem-solving tips. The phone number for the Multi-Tech BBS is 800 392-2432 (USA and Canada) or 612 785-3702 (international and local).

The BBS can be accessed by any asynchronous modem operating at 1200 bps to 33,600 bps at a setting of 8 bits, no parity, and 1 stop bit (8-N-1).

To Log on to the Multi-Tech BBS

1. Set your communication program to 8-N-1.

2. Dial our BBS at 800 392-2432 (USA and Canada) or 763 785-3702 (international and local).

3. At the prompts, type your first name, last name, and password; then press ENTER. If you are a first time caller, the BBS asks if your name is spelled correctly. If you answer yes, a questionnaire appears. You must complete the questionnaire to use the BBS on your first call.

4. Press ENTER until the Main Menu appears. From the Main Menu you have access to two areas: the Files Menu and News. For help on menu commands, type ?.

To Download a File

If you know the file name

1. From the Main Menu, type F to access the Files Menu, and then type D.

2. Enter the name of the file you want to download from the BBS.

3. If a password is required, enter the password.

4. Answer Y or N to the automatic logoff question.

5. Select a file transfer protocol by typing the indicated letter, such as Z for Zmodem (the recommended protocol).

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D Warranty, Service, and Technical Support

6. If you select Zmodem, the transfer begins automatically. If you select another protocol, you might have to initiate the transfer yourself. (In most communication programs, the PAGE DOWN key initiates the download.)

7. When the download is complete, press ENTER to return to the File Menu.

8. To exit the BBS, type G and press ENTER.

If you don’t know the file name

1. From the Main Menu, type F to access the Files Menu. For a list of file areas, type L, press ENTER, then type L and press ENTER again. (If you do not type the second L, you will list all of the files on the BBS.)

2. Mark each file area you would like to examine by typing its list number and pressing ENTER.

3. Enter L to list all the files in the selected file areas. Enter C to go forward in the file list and P to go back.

4. To mark one or more files for download, type M, press ENTER, type the list numbers of the files, and press ENTER again.

5. Enter D to see a list of the files you have marked. Enter E if you would like to edit the list; otherwise enter D again to start the download process.

6. Select a file transfer protocol by typing the indicated letter, such as Z for Zmodem (the recommended protocol).

7. If you select Zmodem, the transfer begins automatically. If you select another protocol, you might have to initiate the transfer yourself. (In most communication programs, the PAGE DOWN key initiates the download.)

8. When the download is complete, press ENTER to return to the File Menu.

9. To exit the BBS, type G and press ENTER.

Multi-Tech on the Internet

Multi-Tech is a commercial provider on the Internet. Multi-Tech has a Web site at

http://www.multitech.com

and an ftp site at

ftp://ftp.multitech.com

To receive support via e-mail, contact Technical Support at

tsupport@multitech.com

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Ordering Modem Accessories

SupplyNet, Inc., can supply you with replacement transformers, cables and connectors for select 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

Phone: (800) 826-0279 Fax: (914) 267-2420 Email: info@thesupplynet.com Internet: http://www.thesupplynet.com

SupplyNet Online Ordering Instructions

1. Browse to http://www.thesupplynet.com. In the Browse by Manufacturer list, select Multi-Tech, and then click .

2. To order, type the quantity, and then click .

3. To change your order, click .

4. When you have finished selecting your items, click to finalize the order. The SupplyNet site uses Verisign’s Secure Socket Layer (SSL) technology to ensure complete shopping security.

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E Upgrading the Modem

Appendix E: Upgrading the Modem

Introduction

Your modem is controlled by semi-permanent software, called firmware, that is stored in flash memory. Firmware is nonvolatile; that is, it remains stored in memory when the modem is turned off. However, it can be changed by either the manufacturer or the user as bugs are fixed or new features are added.

Since the firmware in your modem is stored in flash memory, you can upgrade it yourself in a few minutes by using the following procedures.

Upgrade Overview

The upgrade procedure consists of the following steps, which are described in greater detail in the following sections.

1. Identify the model number and firmware version of your modem.

2. Identify the current version of the firmware at the Multi-Tech Web site or BBS. If your modem already has the current firmware, there is no need to update it.

3. Download the upgrade file for your modem.

4. Extract the upgrade files from the file you downloaded.

5. Document your stored parameters.

6. Upgrade the modem’s firmware.

7. Restore your parameters.

Step 1: Identify the Modem Firmware

You must know the model number and firmware version of your Multi-Tech modem to know whether you should update it.

1. Run your favorite terminal program. If you are using Windows 95, 98, or NT 4.0, you can use HyperTerminal. If you are using Windows 3.11, you can use Windows Terminal.

2. In the program’s terminal window, type AT&F. Even if you cannot see the AT&F command on your screen, be sure to type it completely and then press ENTER.

3. Now type ATI3 and record your results. The firmware version should appear first in the results, similar to the following:

V2.210-V90_2M_DLS

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Step 2: Identify the Current Firmware Version

Identify the current version of the firmware at the Multi-Tech Web site or BBS. If your modem already has the current firmware, there is no need to update it.

Multi-Tech Web Site

1. Using your favorite Web browser, go to http://www.multitech.com/support/

MultiModemDSVD/firmware.asp.

2. Scroll down to the table with your modem model number (non-USA firmware must be obtained directly from the ftp site or BBS at this time).

3. Look at the Current Revision number for your modem.

4. If the Current Revision number matches the firmware version number found in “Step 1: Identify the Modem Firmware,” your modem has the current firmware version and does not need to be updated.

5. If the Current Revision number is larger than the firmware version number found in “Step 1: Identify the Modem Firmware,” your modem has an older firmware version. Continue with “Step 3: Download the Upgrade File.”

Multi-Tech BBS

1. Run your favorite terminal program, and dial in to the Multi-Tech BBS at

2. When the BBS welcome screen appears, type your first name, last name, and pass-

3. Press ENTER until the main menu appears. From the main menu you have access

4. In the Main Menu, type F and press ENTER to access the Files Menu.

5. In the Files Menu, type L and press ENTER, then type L and press ENTER again.

6. Press ENTER until the modem firmware area for your country is listed.

7. Type the number of the modem firmware area for your country and press ENTER.

8. Type L and press ENTER to list the files in the selected area.

9. Press ENTER until your modem model number appears.

10. Look at the version number for your modem.

800 392-2432 (North America) or 763 785-3702 (local and international). If you followed the download test in the “Quick Start” chapter, your terminal program should already be configured for the Multi-Tech BBS.

word following the prompts. If you are a first-time caller, the BBS asks if your name is spelled correctly. If you answer Y, a questionnaire appears. You must complete the questionnaire to use the BBS on your first call.

to two areas: the Files Menu and News. For help with menu commands, type ?.

A two-column list of file areas appears.

11. If the version number matches the firmware version number found in “Step 1: Identify the Modem Firmware,” your modem has the current firmware version and does not need to be updated.

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12. If the version number is larger than the firmware version number found in “Step 1: Identify the Modem Firmware,” your modem has an older firmware version. Continue with “Step 3: Download the Upgrade File.”

Step 3: Download the Upgrade File

Multi-Tech Web Site

1. If you are not already at the Firmware page of the Multi-Tech Web site, follow the procedure in “Step 2: Identify the Current Firmware.”

2. Click on the upgrade file name for your modem, and save the file to a temporary location on your hard disk.

Multi-Tech BBS

1. If you have not already found the upgrade file for your modem on the MultiTech BBS, follow the procedure in “Step 2: Identify the Current Firmware.”

E Upgrading the Modem

2. Type the number of the upgrade file for your modem, and then press ENTER.

3. Type D and press ENTER to list the file to be downloaded.

4. If the correct file is listed, press ENTER; otherwise use the Q command to return to the previous menu.

5. Type Z and press ENTER to select the Zmodem transfer protocol.

6. The download begins automatically. As the file is copied to your hard disk, a dialog box reports on the progress of the download.

7. To log off the BBS, press ENTER, type G for “good-bye,” and press ENTER twice more.

Step 4: Extract the Upgrade Files

1. Move the downloaded upgrade file to a temporary directory or folder on your hard disk, if you have not already done so.

2. The file is a self-extracting archive. Extract the files by typing the upgrade file name in DOS or double-clicking it in Windows.

Step 5: Record the Stored Paramenters

Before you upgrade the modem you should record the parameters that are currently stored in it so you can reprogram it afterward.

1. Run your favorite terminal program. If you are using Windows 95 or Windows NT, you can use HyperTerminal. If you are using Windows 3.11, you can use Windows Terminal.

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2. In the program’s terminal window, type AT&V and press ENTER to list your modem’s current parameters.

3. Record your parameters by saving the screens and sending them to your printer.

4. Close the terminal program.

Step 6: Upgrade the Modem’s Firmware

Before you begin the following procedure, refer to the README.TXT file extracted from the upgrade archive file. Note the file name for the boot code (e.g., 2MBPFL11.S37) and the file name for the new firmware (e.g., 56DSVD2.S37).

1. Run a terminal program, such as HyperTerminal. The program must be able to send a file as ASCII text.

2. Make sure hardware flow control is selected. In HyperTerminal, select File |

Properties | Configure | Connection | Advanced, and make sure both Use flow control and Hardware (RTS/CTS) are selected.

3. In the terminal window, type AT and press ENTER. An OK response should appear, and the TR indicator on the modem should light. If the TR indicator does not light, check your cable, make sure the modem is powered on, and double-check the terminal program’s settings.

4. Type ATI3 and press ENTER. The first number in the response is the firmware version that is currently in your modem (1.00 in this example):

V1.00-V90_2M_DLS

5. Type AT** and press ENTER. Your modem is now ready to accept a flash file.

6. In HyperTerminal, select Send Text File from the Transfer menu.

7. In the Send Text File dialog box, find the temporary directory or folder in which you unarchived the upgrade file, select All files (*.*) in the Files of type box, and double-click the name of the boot code file, e.g., 2MBPFL11.S37. You should see activity on the screen, and your modem’s TD indicator should come on.

Warning: Do not abort at this point. The modem is being reprogrammed, and the process must not be interrupted.

This is the boot code portion of the update. When the boot code has all been sent to the modem, the following message appears:

Download Flash Code..

8. When you see the Download Flash Code.. message, select Send Text File from the Transfer menu.

9. In the Send Text File dialog box, select All files (*.*) in the Files of type box, and double-click the name of the firmware code file, e.g., 56DSVD2.S37.

The firmware code is now sent to your modem. Wait until you receive a message stating that the modem has been successfully programmed.

10. Once modem activity has stopped and you see a Device Successfully Programmed message, type ATI3 and press ENTER. If the upgrade was suc-

cessful, your modem will display the new firmware version.

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Step 7: Restore Your Parameters

Your modem’s firmware update is complete. If required, you can now use your terminal program to reprogram your modem parameters using the information you recorded in Step 5.

E Upgrading the Modem

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Index

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Symbols

µ-Law selection 36, 40

A-Law selection 36, 40 abort timer 44 analog loopback test 69–70 Answer command 27 answering machine capabilities 3 assembling the modem 7 Asynchronous Communications

Mode command 33

AT commands 3, 26–41

#BDR= 42 #CID= 41 #CLS= 43 #MDL? 43 #MFR? 43 #REV? 43 %C 35 %E 35 %L 36 %Q 36 %U 36 &C 31 &D 10, 32 &F 10, 32 &G 32 &K 33 &M 33 &P 33 &Q 33 &S 33 &T 34 &V 34 &W 10, 35 &Y 35 &Z= 35 ** 41 +++AT 41 +MS= 38

-K 40

-SDR 40

-SMS= 42

-SSE= 42 \A 36 \B 36 \G 36 \J 37 \K 37 \N 38 \V 38 A27 A/ 27 AT 2 7 B27 C27 D27

definition 26 descriptions 27–41 DS= 28 E28 format 26 H28 I28 L29 M29 N29 O29 P29 Q30 S= 30 S? 30 T30 V30 W30 X31 Y31

Z 10, 31 attention code 27 autoanswer 26, 44, 56 autobaud 11

backspace character, setting 44 baud rate 10 Baud Rate Select command 42 BBS, Multi-Tech 11, 74 Bell 212A mode 27 Break Control command 37 break signal 37

call card tone 28 Call Waiting 55 Caller ID 10, 56, 57 Caller ID command 41 Canadian regulations 62 carriage return character 44 Carrier Control command 27 carrier loss disconnect time,

setting 44 CD indicator 70 cellular operation 40 COMM.DRV 56, 57 comma, setting pause time 44 command mode 26 command string 26 communication programs

10, 26, 53 Communication Standard com-

mand 27 Communications Mode com-

mand 33 compression, data 3, 56 computer, connecting to 21

configuration

selecting reset configuration 35

storing 10, 35 configuring software 10 Connect Message Control com-

mand 30 connect messages 11, 48–50 connecting the modem 7, 21–22 country code, displaying 29

Data Buffer Control command 37 data buffering 33 data calling tone 45 Data Carrier Detect command 31 data communications, testing 11 data compression 3, 56 Data Compression Control com-

mand 35 data compression selection (S46) 46 Data, Fax, or Voice/Audio Select

command 43 data mode 26, 29, 71 Data Set Ready Control com-

mand 33 Data Terminal Ready com-

mand 10, 32 Data/DSVD Mode command 42 DB-25 connector 20 DB-9 connector 20 DCD Control command 31 default settings 10, 32 Dial command 27 Dial Stored Telephone Number

command 28 dial string modifiers 27 dialing tones 44 digital loopback tests 70–72 disconnect delay 44 Display Current Configuration

command 34 Distinctive Ring Control com-

mand 40 DOC regulations 62 downloading files 12, 13 DSR Control command 33 DSVD Enable/Disable com-

mand 42 DSVD operation 16 DTE rate 10 DTR Control command 10, 32 DTR delay (S25) 45

Echo Command Mode Characters

command 28 ENTER key 27 equipment, required 20

Page 93

Index

error control, setting 46 error correction 3, 70, 71 Error Correction Mode Selection

command 38 escape character 44 escape sequence 26, 41 escape sequence guard time

(S12) 44

fallback 29 fax 3 fax communications 14 FCC regulations 60, 61 features 20 firmware

upgrading 77–81

version 28 flash dial modifier (!) 45 flash memory 77 Flash Memory Download com-

mand 41 flow control 20, 33, 36, 56 Flow Control Selection com-

mand 33 front panel 23, 52

garbage characters 57 Guard Tone Control command 32

handshake 29 hangup command 28 hangup delay 44, 46 Hook Control command 28 HyperTerminal 12

Identify Manufacturer command 43 Identify Model command 43 Identify Revision Level com-

mand 43 inactivity timer 45 indicators 23, 52 Information Request command 28 initialization strings 10, 26, 53 installation and setup 6–9 Internet addresses 75

K56flex protocol 2

LED indicators 23, 52 line connection 8

line feed character 44 LINE jack 21 Line Quality Monitor command 35 Line Signal Level command 36 Line Signal Quality command 36 Load Factory Settings com-

mand 10, 32 local analog loopback test 69–70 local digital loopback test 71–72 Long Space Disconnect com-

mand 31 loopback tests 69–72 lost data 56

Macintosh computers 20 messages 48–50 Microsoft Fax 15 MNP 5 data compression 3, 35, 56 MNP error correction 3, 38 MNP Extended Services com-

mand 40 Modem Port Flow Control com-

mand 36 Modem Reset command 10, 31 Modulation Handshake com-

mand 29 Modulation Selection command 38 Monitor Speaker Mode com-

mand 29 Monitor Speaker Volume com-

mand 29 mounting the feet 7 Multi-Tech BBS 11, 74 Multi-Tech Internet addresses 75

New Zealand regulations 63 NO CARRIER message (S86) 47

on-hook/off-hook 28 online command mode 26

package contents 4 pause time for comma, setting 44 PCM Code Selection command 36 phone connection 8 PHONE jack 22 power

connection 8 supply 22, 52

switch 22 programs, communications 10 protocols 56 Pulse Dial Make/Break Ratio

command 33

Pulse Dialing command 29

rate, maximum data 46 Read Register Value command 30 reference materials 17 registering your product 74 regulatory compliance 60–63 related manuals 4 remote digital loopback test 70–71 removing a modem from Win-

dows 9 repairs 73 Repeat command 27 required equipment 6, 20 resetting the modem 10, 31, 32 Result Code Format command 30 Result Code Selection command 31 result codes 26, 48–50, 54 Result Codes Enable/Disable

command 30 Return Online to Data Mode

command 29 rings, setting number of 10, 44 robbed bit signaling detection 40 ROM checksum 28 RS-232 20 RS-422 20 RS232 connection 8, 21

S-registers 44–47

reading 30 S0 10, 44 S1 44 S10 44 S11 44 S12 44 S18 45 S2 44 S24 45 S29 45 S3 44 S30 45 S32 45 S33 45 S35 45 S36 45 S37 46 S38 46 S4 44 S46 46 S48 46 S5 44 S6 44 S7 44 S8 44 S86 47

Page 94

MultiModemDSVD User Guide

S9 44

setting 30 safety 6 Select Maximum MNP Block Size

command 36 Select Profile command 35 serial cable 53 serial port 53, 54, 56

Macintosh 20

speed 10 servicing your modem 61, 73 Set Register Value command 30 Single Line Connect Message

command 38 sleep mode timer (S24) 45 software, communications 10 solving problems 52–57 Speaker Mode command 29 specifications, technical 65–67 speed, maximum 46 speed conversion (data

buffer) 33, 37 Store Current Configuration

command 10, 35 Store Telephone Number com-

mand 35 surge protector 22

technical specifications 65–67 technical support 74

telephone

connecting a 8, 22 line 21, 54

number, storing 35 terminal mode 53, 70 Terminal program 13 test timer (S18) 45 testing the modem 8, 22, 34, 54

loopback tests 69–72

self-test 52 Tone Dialing command 30 tones, dialing 44 Transmit Break command 36 troubleshooting 52–57

UARTs 10, 56, 57 uninstalling a modem from Win-

dows 9

upgrading the modem 77–81

V.22 mode 27 V.22bis Guard Tone Control com-

mand 32 V.25 data calling tone 45 V.42 error correction 3, 38 V.42bis data compression 3, 35 V.54 tests 34, 69–72 V.90 protocol 2

voice commands 42–43 voice operation 16

wait time for dial tone 44 warranty 60, 73 Windows 3.1 53, 56, 57 Windows 95 54, 9 Windows NT 9 Windows Terminal 12, 13 World Wide Web 17

Xmodem 56 XOFF character (S33) 45 XON character (S32) 45

Ymodem/G protocol 56

Zmodem protocol 56