Multi-Tech Systems MT5600BL, MT5600BA User Manual

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Model MT5600BA Model MT5600BL

Data/Fax Modem

User Guide

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MultiModemII User Guide

Models MT5600BA and MT5600BL P/N 88302601 Revision B (7/9/99)

written permission from Multi-Tech Systems, Inc. Multi-Tech Systems, Inc. makes no representations or warranties with respect to the contents hereof and

specifically disclaims any implied warranties of merchantability or fitness for any particular purpose. Furthermore, Multi-Tech Systems, Inc. reserves the right to revise this publication and to make changes in the content hereof without obligation of Multi-Tech Systems, Inc. to notify any person or organization of such revisions or changes.

Record of Revisions

Revision Date Description

B 7/9/99 Manual revised.

Trademarks

MultiModemII, Multi-Tech, and the Multi-Tech logo are trademarks of Multi-Tech Systems, Inc. Adobe and Acrobat are trademarks of Adobe Systems Incorporated. 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. All other brand and product names mentioned in this publication are trademarks or registered trademarks of their respective companies.

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

(612) 785-3500 or (800) 328-9717 Fax (612) 785-9874 Fax-Back Service (612) 717-5888 Technical Support (800) 972-2439 BBS (612) 785-3702 or (800) 392-2432 Internet http://www.multitech.com

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FCC Part 15

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

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

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

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 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 numerique de la classe B respecte toutes les exigences du Reglement sur le materiel brouilleur du Canada.

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MultiModemII User Guide

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

RS232 Connection ............................................................................................................ 7

Dialup Connection .......................................................................................................... 7

Two-Wire Leased Line Connection............................................................................... 8

Four-Wire Leased Line Connection .............................................................................. 8

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

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

Surge Protectors and Lightning ..................................................................................... 8

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

Step 2: Install the Modem in Windows ............................................................................... 9

Adding the Modem to Windows .................................................................................. 9

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

Step 3: Install and Configure Your Software .................................................................... 10

Step 4: Call the Multi-Tech BBS .......................................................................................... 11

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

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

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

Step 5: Send a Fax ................................................................................................................. 14

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

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

References .............................................................................................................................. 15

Chapter 3: Using the Front Panel

Introduction ........................................................................................................................... 18

Modem Configuration ......................................................................................................... 18

LED Indicators ...................................................................................................................... 18

Liquid Crystal Display (LCD) ............................................................................................. 19

Option Selection............................................................................................................. 19

Menu Structure .............................................................................................................. 19

Menu Overview ............................................................................................................. 20

Status Trunk ............................................................................................................ 21

Basic Options Trunk ............................................................................................... 22

Advanced Options Trunk...................................................................................... 23

Remote Configuration Options Trunk................................................................. 24

Diagnostic Options Trunk ..................................................................................... 24

Phone Number Memory Options Trunk............................................................. 25

Caller ID Options Trunk ........................................................................................ 25

Menu Options ................................................................................................................ 26

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Status ........................................................................................................................ 26

Basic Options .......................................................................................................... 27

Advanced Options ................................................................................................. 28

Remote Configuration Options ............................................................................ 29

Diagnostic Options ................................................................................................. 30

Phone Number Memory Options ........................................................................ 30

Caller ID Options ................................................................................................... 30

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

Introduction ........................................................................................................................... 32

AT Commands ...................................................................................................................... 33

S-Registers.............................................................................................................................. 49

Result Codes .......................................................................................................................... 53

Chapter 5: Remote Configuration

Introduction ........................................................................................................................... 58

Basic Procedure ..................................................................................................................... 58

Setup ....................................................................................................................................... 58

Changing the Remote Configuration Password ....................................................... 58

Changing the Remote Escape Character .................................................................... 59

Contents

Chapter 6: Callback Security

Introduction ........................................................................................................................... 62

Setup Procedures .................................................................................................................. 62

Turning Callback Security On and Off....................................................................... 62

Assigning Callback Passwords .................................................................................... 63

Assigning Callback Phone Numbers .......................................................................... 64

Calling Procedure ................................................................................................................. 65

Callback Security Commands............................................................................................. 65

Chapter 7: Leased Line Operation

Introduction ........................................................................................................................... 70

Two-Wire Setup .................................................................................................................... 70

Four-Wire Setup.................................................................................................................... 71

Dial Backup and Leased Line Restoral .............................................................................. 72

Dial Backup and Leased Line Restoral Setup ................................................................... 72

Chapter 8: Solving Problems

Introduction ........................................................................................................................... 76

None of the Indicators Light ............................................................................................... 76

The Modem Does Not Respond to Commands ............................................................... 77

The Modem Dials But Cannot Connect ............................................................................. 78

The Modem Disconnects While Online ............................................................................. 79

The Modem Cannot Connect When Answering .............................................................. 80

File Transfer Is Slower Than It Should Be ......................................................................... 80

Data Is Being Lost ................................................................................................................. 81

There Are Garbage Characters on the Monitor ................................................................ 81

The Modem Doesn’t Work with Caller ID ........................................................................ 81

Fax and Data Software Can’t Run at the Same Time ...................................................... 82

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MultiModemII User Guide

Appendix A: Regulatory Compliance

FCC Part 68 Telecom ............................................................................................................ 84

Fax Branding Statement....................................................................................................... 85

Canadian Limitations Notice .............................................................................................. 86

International Modem Restrictions...................................................................................... 86

Commission Decision CTR21.............................................................................................. 86

EMC, Safety, and Terminal Directive Compliance .......................................................... 87

New Zealand Telecom Warning Notice ............................................................................ 87

Appendix B: Technical Specifications

.................................................................................. 88

Appendix C: Loopback Tests

Introduction ........................................................................................................................... 91

Local Analog Loopback Test (V.54 Loop 3) ...................................................................... 91

Remote Digital Loopback Test (V.54 Loop 2) ................................................................... 92

Local Digital Loopback Test (V.54 Loop 2) ....................................................................... 93

Back-to-Back Test .................................................................................................................. 94

Appendix D: Warranty, Service, and Technical Support

Limited Warranty ................................................................................................................. 96

Service .................................................................................................................................... 96

Technical Support ................................................................................................................. 97

Online Warranty Registration............................................................................................. 97

The Multi-Tech BBS ..............................................................................................................97

To Log on to the Multi-Tech BBS ................................................................................ 97

To Download a File ....................................................................................................... 97

About the Internet ................................................................................................................ 98

Ordering Modem Accessories ............................................................................................ 99

Appendix E: Upgrading the Modem

Introduction ......................................................................................................................... 100

Upgrade Overview ............................................................................................................. 100

Step 1: Identify the Modem Firmware............................................................................. 100

Step 2: Identify the Current Firmware Version .............................................................. 101

Multi-Tech Web Site .................................................................................................... 101

Multi-Tech BBS ............................................................................................................ 101

Step 3: Download the Upgrade File ................................................................................. 102

Multi-Tech Web Site .................................................................................................... 102

Multi-Tech BBS ............................................................................................................ 102

Step 4: Extract the Upgrade Files...................................................................................... 102

Step 5: Set the Modem to the Factory Defaults .............................................................. 102

Step 6: Upgrade the Modem’s Firmware ........................................................................ 103

Step 7: Restore Your Parameters ...................................................................................... 103

Appendix F: Cable Pinouts

RS-232 Pinouts .................................................................................................................... 104

Leased Line Pinouts ........................................................................................................... 105

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Contents

Appendix G: ASCII Character Map

Index

..................................................................................................................................................................... 107

......................................................................................... 106

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Introduction

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MultiModemII User Guide

Introduction

Congratulations on your purchase of the MultiModemII modem. You have acquired one of the finest intelligent data/fax modems available today from one of the world’s oldest modem manufacturers: Multitech Systems, Inc. This user guide will help you install, configure, test and use your modem.

Product Description

The MultiModemII MT5600BA and MT5600BL modems incorporate new modem technologies called K56flex™ and V.90, both of which enable Internet connections at data rates up to 53K bps* over standard telephone lines. These protocols are able to send data downstream to your computer at high speeds by taking advantage of the fact that data on the telephone network normally is converted from digital to analog only once before it reaches your modem. Upstream transmissions and transmissions between client modems are limited to data rates of 33.6K bps, as are downstream transmissions that are converted more than once on the telephone network.

Both models support two-wire leased line operation. The MT5600BL model also supports four-wire leased line operation with dial backup and automatic leased line restoral. Please note that, because leased line operation consists of two client modems connected to each other, the maximum leased line data rate is 33.6K bps.

Features

The MultiModemII offers interactive automatic dialing. You can store four command lines or telephone numbers of up to 30 characters each in the modem’s nonvolatile memory. The modem pulse- or tone-dials, and recognizes dial tones and busy signals for reliable call-progress detection. It can also detect AT&T calling card tones. It is FCC-registered for connection to telephone networks without notification to the telephone company.

The MultiModemII front panel includes a liquid crystal display and four buttons that together can be used to display the current connection status of the modem or to configure the modem. The MultiModemII also can be configured through standard AT commands.

General

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

• Uses DTMF and tone detection to distinguish data and fax calls when used with software that supports these features.

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

• Supports Caller ID (North American versions only).

• Displays status and configuration information on a front panel LCD.

*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 K56flexTM and ITU-T V.90 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.

Note: Under the 56K bps standards, you can asymmetrically download data from an ISP at speeds up to 53K bps, but upload only at speeds up to 33.6K bps. Clientto-client operation, including leased line operation, is also limited to 33.6K 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.

• Supports both synchronous and asynchronous data transfer.

• Both models support two-wire leased line operation. The BL model also supports

four-wire leased line operation with dial backup and leased line restoral.

• Supports callback security and remote configuration.

• 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.

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

• Supports Plug and Play (PnP).

• Can be flash upgraded.

Fax

• Supports V.17, Class 1, Class 2, and Group 3 fax standards, allowing it to commu-

nicate 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.

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MultiModemII 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 MT5600BA or MT5600 BL modem A wall mount transformer

•

One (MT5600BA) or three (MT5600BL) modular telephone cables

•

A printed Quick Start Guide

•

This User Guide on disk

•

An installation disk

•

A CD containing Trio data and fax 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, or the Internet).

Related Manuals

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

82076200 MT56XX Fax Class 1 Developer’s Guide

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

82006502 Fax Class 2 Developers’s Kit

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

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Quick Start

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MultiModemII User Guide

Introduction

We know you are eager to get your MultiModemII 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 MT5600BA or MT5600 BL modem

A wall mount transformer

One (MT5600BA) or three (MT5600BL) modular telephone cables

Trio communications software

A Quick Start Guide

This User Guide on disk

An installation disk

You supply

A computer with an unused serial port

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

A nearby AC power outlet

A nearby telephone line jack

A nearby leased line jack or terminals (optional)

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: Connect the Modem to Your System

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

LEASEDLINE

PHONE

VOLUME

EIA RS232C

POWER

2 Quick Start

Figure 2-1. MT5600BL connections.

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.

Dialup Connection

Plug one end of the modular phone cable into the modem’s LINE jack, and the other end into a public switched telephone network (PSTN) wall jack.

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

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

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MultiModemII User Guide

Two-Wire Leased Line Connection

MT5600BA: Plug one end of a two-wire phone cable into the modem’s LINE jack, and connect the other end to a leased line wall jack or terminals.

MT5600BL: Plug one end of a two-wire phone cable into the modem’s LEASED jack, and connect the other end to a leased line wall jack or terminals.

Four-Wire Leased Line Connection

On an MT5600BL only, plug one end of a four-wire phone cable into the modem’s LEASED jack, and connect the other end to a four-wire leased line wall jack or terminals. For dial backup operation, plug one end of the modular phone cable into the modem’s LINE jack, and the other end into a PSTN wall jack.

Phone Connection

For voice-only calls, plug a telephone into the modem’s PHONE jack (optional).

Power Connection

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

Note: Use only the transformer supplied with the modem. Use of any other transformer voids the warranty and can damage the modem.

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 phone 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, it is safest to unplug your computer equipment from both the power outlet and the telephone line.

Power-On Test

Test the modem by turning it on (an on/off switch is located on the front panel). When you apply power, the modem performs a diagnostic self-test, indicated by the TM indicator lighting for a few seconds, after which the LCD 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 8, “Solving Problems.”

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Step 2: Install the Modem in Windows

If you are using Windows 95, Windows 98, Windows NT 4.0, or Windows 2000, you must install the modem in the operating system. (If you are using another operating system, such as DOS or Windows 3.x, skip this step and go to step 3.)

Adding the Modem to Windows

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

2. Double-click the Modems icon. If no modem is currently installed, the Install

New Modem wizard appears. If a modem is already installed, the Modems Properties sheet appears; click Add to go to the Install New Modem wizard.

3. Click Next in the Install New Modem wizard. Windows searches for your new modem and asks you to verify its selection.

Note: If Windows cannot find a modem, your modem may be turned off, it may be plugged into the wrong connector on your computer, or the serial cable may be faulty. See “None of the LEDs Light When the Modem Is Turned On” and “The Modem Does Not Respond to Commands” in Chapter 8, “Solving Problems.”

2 Quick Start

4. If Windows identifies your modem correctly, click Next to install the modem. After the modem is installed, click Finish to exit.

5. If Windows cannot identify your modem (for instance, if it identifies your modem as a “Standard Modem”), click Change. A dialog box with a list of manufacturers and a list of modems appears.

6. Insert your modem’s setup disk into your floppy drive and click Have Disk.

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

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

9. Windows NT 4.0 only: Select the port the modem is attached to, and click Next.

10. Windows installs and configures the modem.

11. Click Finish to exit.

Removing Your Old Modem from Windows

When your new modem replaces another modem, the old modem installation remains in Windows, and the old modem is still 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 modem by removing the old modem from Windows.

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

2. Double-click the Modems icon to open the Modems Properties sheet.

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

4. Click Remove, and then click Close.

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MultiModemII User Guide

5. The next time you dial a HyperTerminal connection, it will select your new modem and ask you to confirm the selection.

Step 3: Install and Configure Your Software

Your Multi-Tech modem is controlled by communication software installed on your computer. If you wish to use software that is already installed, you should reconfigure it for your new modem; otherwise, install the Trio data and fax communications software provided with the modem.

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

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

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 communication program’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 95 or NT 4.0, or set it to 57,600 bps if it has Windows 3.1x. If you have an older computer with a 14550 UART, set it to 19,200 bps. Older Macintosh computers can use a serial port baud rate of 57,600 bps; newer ones can use a serial port baud rate of 115,200 bps or 230,400 bps.

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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 or 98, select Start | Settings | Control Panel, and double-click on the Modems icon. In the Modems Properties dialog box, click the Diagnostics tab, click the port the modem is connected to, and click More Info to see the UART type. Note that both programs will identify a 14550 UART as an 8250A UART. If you have an 80386 or later computer, your UART is most likely a 14550 or 16550AFN.

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 4: Call the Multi-Tech BBS

2 Quick Start

You can 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 later, or REGISTER.TXT if you do not.

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.

Directory opens.

dialog box opens.

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

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

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MultiModemII User Guide

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.

14. At the file name prompt, if you have Microsoft Word 6.0 or later, type register.doc and press E press E

NTER. If you do not have Microsoft Word, type register.txt, and then-

NTER.

15. Press E

NTER twice more.

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

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 the Hypertrm icon. HyperTerminal asks for the name of the connection.

3. Type Multi-Tech BBS in the Name box, and then 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.

NTER.

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 File Menu and News. For help with menu commands, type ?.

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

12. 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 then press ENTER.

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13. Press ENTER twice more.

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

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

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

17. In the HyperTerminal window, click File, and 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 Terminal 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 File Menu and News. For help with menu commands, type ?.

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

8. 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.

9. Press ENTER twice more.

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

11. 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.

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MultiModemII User Guide

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

Step 5: Send a Fax

To test your modem’s fax capabilities, send the completed registration file that you downloaded in “Step 4: 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.

Microsoft Fax

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.

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.

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2 Quick Start

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

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

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

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

7. Click Add to list, then click Next.

8. Pick a cover page, then click Next.

9. Type a subject line (e.g., MT5600BA 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,

•

and then select Microsoft Fax as the default printer. In a Windows 9x application, select Send from the File menu.

•

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

•

References

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

• Costmo’s Other Resources Page:

http://modems.rosenet.net/or/

• Curt’s High Speed Modem Page:

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

• Data Communications FAQ:

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

• Multi-Tech Systems, Inc.:

http://www.multitech.com/

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MultiModemII User Guide

Page 25

Using the

Front Panel

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MultiModemII User Guide

Introduction

Like any modem, your Multi-Tech modem operates only under the control of a communication program, such as the Trio DataFax program included with the modem. It also operates under other general-purpose data communication programs, such as Windows Terminal and HyperTerminal. For information on how to use the modem with the communication program of your choice, please refer to the program’s documentation.

Modem Configuration

Your modem normally is configured through Windows or through the communication program you are using. The default settings work best for most purposes. See “Step 3: Install and Configure Your Software” in Chapter 2 for help in setting up your communication program.

You also can configure your modem either through the front panel or by sending AT commands to the modem. This chapter describes how to configure it using the front panel. To configure it using AT commands, see Chapter 4.

Figure 3-1. Front panel

LED Indicators

The MT5600BA/BL has six LED indicators on the front panel that indicate status and activity:

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

Transmit Data. The TD indicator flashes when the modem is transmitting

data.

Carrier Detect. The CD indicator 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.

Off-Hook. The OH indicator 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.

Page 27

Terminal Ready. The TR indicator lights when a communication program is using the modem. It means the modem is ready for an outgoing or incoming call. It goes off when the communication program disconnects the serial port. When it goes off, a connected modem will disconnect.

Test Mode. The TM indicator lights when the modem is in test mode.

Liquid Crystal Display (LCD)

The MultiModemII’s backlit liquid crystal display (LCD) has two functions: to display the current status of the modem and to display configuration menus, which are selected using the four pushbuttons on the front panel.

Option Selection

To select most configuration options, simply display the option in the LCD, and then press the Enter button to select it. An OPTION SET message appears to confirm the selection. To exit the OPTION SET message, press any button.

3 Using the Front Panel

Some options, such as password options and phone number options, require you to enter a character string. To select a character, press the áß and â buttons. To go to the next character position, press the à button. To backspace, press the à button before selecting a character. To exit without saving, press the à button several times. To save a character string, press the Enter button.

Menu Structure

The LCD menus have a tree structure with multiple trunks, limbs, branches, and twigs. For a schematic view, refer to the menu map on the next page.

Trunks are the major divisions of the menu tree. There are seven trunks: Status, Basic Options, Advanced Options, Remote Configuration, Diagnostics, Phone Number Memory, and Caller ID. Use the áß and â buttons to move between trunks.

Limbs are subdivisions of trunks. Use the à button to move from a trunk onto its first limb, and the áß and â buttons to move between limbs on the trunk.

Branches are subdivisions of limbs. Use the à button to move from a limb onto its first branch, and the áß and â buttons to move between branches on the limb.

Twigs are status screens and options that are accessible only from branches. Use the à button to move from a branch to its first status screen or option; then press the áß

and à buttons to move between options, and press the Enter button to select an option.

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MultiModemII User Guide

Menu Overview

Trunks Limbs Branches Twigs

Page 29

Status Trunk

3 Using the Front Panel

The Status Trunk shows the current operating status of the modem. Limb changes are automatic, but certain options can be accessed by pressing the à button. Note that when the modem is online, pressing the à button shows the connect status, including the data speed, connection type, and compression type.

Limbs Twigs

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MultiModemII User Guide

Basic Options Trunk

Use the Basic Options Trunk to configure the modem’s basic operating conditions. When entering a number, use the áß and â buttons to scroll through a list of digits and characters. To go to the next position, press the à button. To back up or to exit without dialing, press the à button several times.

Limbs Branches Twigs

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Advanced Options Trunk

Use the Advanced Options Trunk to configure RS-232, dial backup, and callback security options. When entering a number or password, use the áß and â buttons to select a character or digit. To go to the next position, press the à button. To backspace or to exit, press the à button several times.

Limbs Branches Twigs

3 Using the Front Panel

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MultiModemII User Guide

Remote Configuration Options Trunk

Use the Remote Configuration Options Trunk to enable or disable remote configuration on the modem, and to change the password. When entering the password, use the áß and â buttons to scroll through the alphabet. To go to the next character position, press the à button. To backspace or to exit, press the à button several times.

Limb Branches Twigs

Diagnostic Options Trunk

Use the Diagnostic Options Trunk to run loopback tests on the modem. When a test is in progress, the TM indicator lights.

Limb Branches Twigs

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Phone Number Memory Options Trunk

The MultiModemII can store up to four telephone numbers for speed dialing. Use the Phone Number Memory Options Trunk to store, list, and dial these numbers. When entering a number, use the áß and â buttons to scroll through the available digits and dialing commands. To go to the next position, press the à button. To backspace or to exit, press the à button several times.

Limb Branches Twigs

3 Using the Front Panel

Caller ID Options Trunk

Use the Caller ID Options Trunk to enable or disable Caller ID operation.

Limb Branches Twigs

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MultiModemII User Guide

Menu Options

This section describes important LCD screens and options. Many, but by no means all, of the options have AT command equivalents.

Status

Status screens display the current status of the modem. Though limb changes are automatic, certain options can be selected by pressing the à button.

STATUS = IDLE. The modem is ready but inactive. This screen appears when the modem is first turned on, and is the starting point for accessing all other screens. Three options are available from this screen by pressing the à button:

MANUAL ORIG.? Places the modem in originate mode for the time specified by register S7. Use this option to connect to a remote modem by manually dialing the number on a phone connected to the local modem. When the remote modem answers, press the Enter button to establish a connection with the remote modem. You can also use this option to temporarily place the modem in originate mode for back-to-back testing.

MANUAL ANSWER? Places the modem in answer mode for the time specified by register S7. You can use this option to temporarily place the modem in answer mode for back-to-back testing.

BUSY OUT MODEM? Takes the modem out of service by putting it into an off-hook state so that a calling modem receives a busy signal.

MODEM BUSIED OUT. Shows that the modem is busied out. To return the modem to normal service, press à, Enter.

STATUS = ONLINE. The modem is connected to another modem. Two options are available from this screen by pressing the à button:

Connect Status. Shows the connect speed, connection type, and error correction being used.

DISCONNECT? Press the Enter button to force the modem to hang up. Same as the ATH command.

RINGING. A remote modem or caller is attempting to establish a connection. One option is available from this screen by pressing the à button:

MANUAL ANSWER? Forces the modem to answer the phone. You can use this option to establish a connection if autoanswer is turned off (S0=0). Same as the ATA command.

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Basic Options

3 Using the Front Panel

The following screens are used to configure the modem’s basic operating conditions. ONLINE OPTIONS. The following screens are used to configure the online opera-

tion of the modem:

LINE TYPE OPTIONS. Use the à and Enter buttons to select from the following line types: dial-up (PSTN), two-wire leased line originate or answer, and four-wire leased line originate or answer.

ERROR CORRECTION OPTIONS. Use the à and Enter buttons to turn error correction on or off, or to select automatic error correction. Same as the &E0, &E1, and &E2 commands.

FLOW CONTROL OPTIONS. Use the à and Enter buttons to select no flow control, hardware flow control, or software flow control. Same as the &E3, &E4, and &E5 commands.

DIALING OPTIONS. The following screens are used to configure dialing options or to dial manually.

TONE/PULSE. Use the à and Enter buttons to select between DTMF tone dialing and pulse dialing. Same as the T and P com- mands.

BLIND/SMART DIAL OPTIONS. Use the à and Enter buttons to select blind dialing, in which the modem sends the OK, CON- NECT, RING, NO CARRIER, ERROR and NO ANSWER messages to the computer and does not look for a dial tone or busy signal, or smart dialing, in which the modem sends all messages to the computer, including NO DIALTONE and BUSY. Same as the X0 and X4 commands.

DIAL NUMBER. Use the front panel buttons to enter a phone number and dial it. To scroll through a list of digits and characters, press the áß and â buttons. To go to the next position, press the à button. To back up or to exit without dialing, press the à button several times. To dial the number, press the Enter button. Same as the D command.

DTR DIALING. Use the à and Enter buttons to enable or disable DTR dialing. DTR dialing is popular in synchronous applications. In DTR dialing, the modem automatically dials the number stored in memory location 3 when it detects a high DTR (Data Terminal Ready) signal on the RS-232 interface. The DTR signal must remain high for the duration of the call. To store the DTR dialing number, use the &Z3= command or the ENTER

PHONE #3 menu option.

Note: Plug and Play does not function if DTR dialing is enabled.

DTR is used during Plug and Play, and DTR dialing interferes with it.

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MultiModemII User Guide

COMMAND MODE OPTIONS. The following screens are used to configure result code responses.

SYNC/ASYNC OPTIONS. Use the à and Enter buttons to select the method of data transmission.

ENABLE/DISABLE RESPONSE. Use the à and Enter buttons to enable or disable the sending of result codes to the computer. Same as the Q0 and Q1 commands.

VERBOSE/TERSE RESPONSE. Use the à and Enter buttons to select verbose or terse result codes. Same as the V0 and V1 commands.

ASYNC, NORM? Normal asynchronous transmission using the AT command set.

ASYNC, V.25bis? Asynchronous transmission using the V.25bis command set.

SYNC, NORM? Normal synchronous transmission using any command set.

V.25bis HDLC NRZ? V.25bis synchronous transmission using NRZ encoding. Not implemented.

RESET FACTORY DEFAULTS. Use the à and Enter buttons to reset Profile 0 and the modem’s active configuration to the factory defaults. Same as the AT&F&W command string.

Advanced Options

RS232 OPTIONS. The following screens are used to configure the RS-232 interface.

V.25bis HDLC NRZI? V.25bis synchronous transmission using

NRZI encoding. Not implemented.

V.25bis BISYNC? V.25bis bisynchronous transmission. Not implemented.

DTR OPTIONS. Use the à and Enter buttons to select how the modem responds to the high to low transition of the DTR signal sent by the computer. DTR NORMAL causes the modem to hang up; IGNORE DTR allows operation with computers that do not provide DTR; and RESET ON DTR â causes the modem to perform a soft reset as if the Z command were received. Same as the &D0, &D2, and &D3 commands.

CARRIER DETECT OPTIONS. Use the à and Enter buttons to select whether CD will be forced high (CD FORCED ON) or whether it will go high when the remote modem’s carrier signal is detected, and go low when the carrier signal is not detected (CD NORMAL). Same as the &C0 and &C1 commands.

CTS OPTIONS. Use the à and Enter buttons to select whether the CTS state will follow the RTS state when on line (CTS NORM) or whether CTS will always be high (CTS ON). Same as the &R0 and &R1 commands.

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3 Using the Front Panel

DIALBACKUP/LL OPTIONS. The following screens are used to configure dial backup for four-wire leased line operation. For more information, see Chapter 7, “Leased Line Operation.”

DIAL BACKUP NUMBER. Use to enter a dial backup number. To scroll through a list of digits and characters, press the á and â buttons. To go to the next position, press the à button. To back up or to exit without saving, press the à button several times. To save the number, press the Enter button.

TIME TO RESTORE (S15). Use to set how frequently leased line restoral attempts occur when the modems are in dial backup mode. The restore time interval can be set from 10 to 255 minutes in one minute increments. Same as the S15= command.

DIALBACKUP TIME (S17). Use to set how long the modem waits after a leased line failure before it attempts a dial backup connection. The timer can be set from 1 to 255 minutes in one minute increments. Same as the S17= command.

CALLBACK SECURITY. Use the à and Enter buttons to turn callback security on or off. Same as the #DB0 and #DB1 commands. For more information about callback security, see Chapter 6, “Callback Security.”

Remote Configuration Options

The following screens are used to configure remote configuration options. For more information about remote configuration, see Chapter 5, “Remote Configuration.”

PASSWORD SETUP. Use to enter callback security passwords in memory locations 1–30. Each password must be six to ten characters in length. To scroll through a list of digits and characters, press the áß and â buttons. To go to the next position, press the à button. To back up or to exit without saving, press the à button several times. To save the password, press the

Enter button. Same as the #CBP= command. CALLBACK NUMBER. Use to enter callback security phone

numbers in memory locations 1–30. Each number can be up to 30 characters long. Same as the #CBN= command.

ENABLE/DISABLE R.C. Use the à and Enter buttons to turn remoteconfiguration on or off.

REMOTE CONFIG. PASSWORD. Use to enter the remote configuration password. To scroll through a list of digits and characters, press the áß and â buttons. To go to the next position, press the à button. To back up or to exit without saving, press the à button several times. To save the password, press the Enter button.

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MultiModemII User Guide

Diagnostic Options

Use the following screens to turn loopback tests on and off. For information about how to apply these tests, see Appendix C, “Loopback Tests.”

Phone Number Memory Options

Use the following screens to list, enter, and dial stored phone numbers. Up to four phone numbers can be stored. The number in memory location 3 is used for DTR dialing, if DTR dialing is enabled.

ANALOG LOOPBACK. Press the à and Enter buttons to start the analog loopback test. The TEST IN PROGRESS screen appears. To stop the test, press the à and Enter buttons again.

DIGITAL LOOPBACK. Press the à and Enter buttons to start the local digital loopback test. The TEST IN PROGRESS screen appears. To stop the test, press the à and Enter buttons again. Same as the &T3 command.

REMOTE DIGITAL LOOPBACK. Press the à and Enter buttons to start the remote digital loopback test. The TEST IN

PROGRESS screen appears. To stop the test, press the à and Enter buttons again. Same as the &T6 command.

Caller ID Options

Press the à and Enter buttons to enable formatted (FCID) or unformatted (UCID) Caller ID, or to disable Caller ID altogether. Same as the #CID=0, #CID=1, and #CID=2 commands.

Note: Since Caller ID information is sent between the first and second ring, register S0 must be set to 2 or more rings for the modem to receive Caller ID information.

LIST PHONE NUMBERS. Press the à button several times to display the phone number stored in each memory location.

ENTER PHONE NUMBERS. Use to store up to four phone numbers in memory locations 0–3. Each number can have up to 30 characters. To scroll through a list of digits and characters, press the áß and â buttons. To go to the next position, press the à button. To back up or to exit without saving, press the à button several times. To save the number, press the Enter but- ton. Same as the &Z= commands.

DIAL STORED NUMBERS. Press the à and Enter buttons to dial a stored phone number. Same as the DS= commands.

Page 39

AT Commands,

S-Registers &

Result Codes

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MultiModemII User Guide

Introduction

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 communications program,

such as the HyperTerminal applet in Windows 95, 98, 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, communications programs make daily operation of modems effortless by hiding the commands from the user. Most users, therefore, need to use AT commands only when reconfiguring the modem, e.g., to turn autoanswer on or off.

The format for entering an AT command is ATXn, where X is the command and n is the 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 Commands” section, 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.

Page 41

AT Commands

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

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

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

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

4 AT Commands, S-Registers, and Result Codes

the escape sequence.

mand with AT. Do not press ENTER to execute.

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

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

Communication Standard Setting

bps.

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

Dial

long 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.

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

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MultiModemII User Guide

Command: DS= Values: n = 0–3 Default: none Description: Dial a number previously stored in directory number y by the

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.

Dial Stored Telephone Number

&Zy=x command. Example: ATDS=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: MT5600BA.

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.

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

ASCII format. I5 Display the country code. Example: 022. I6 Display the modem data pump model and internal code version.

Example: RCV56DPF-PLL L8571A Rev 29.00/29.00.

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4 AT Commands, S-Registers, and Result Codes

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

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

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

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

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.

dial modifier is received.

Result Codes Enable/Disable

Q1 Disable result codes.

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MultiModemII User Guide

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: Sets value of register Sr to n, where n is entered in decimal

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

Command: T Tone Dialing Values: P, T Default: T Description: Forces DTMF (touch-tone) dialing until a P command or P dial

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.

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

written to the last accessed S-register.

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

is used, the last accessed S-register is read.

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 Disables sending or responding to a 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.

S-Registers

4 AT Commands, S-Registers, and Result Codes

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

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

answers. ATS0=0 disables autoanswer completely.

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

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

128–255 character. Values greater than 127 disable

escape.

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

character.

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

character.

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

33–127 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 phone 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 the 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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S13 decimal 0, 1–127 42 (*) Sets the ASCII code for the remote configu-

S15 minutes 10–255 30 Sets the length of time the modem waits

S17 minutes 0–255 1 Sets the length of time the modem waits af-

S18 seconds 0–255 0 Sets the number of seconds that the modem

S24 seconds 0–255 0 Sets the number of seconds that the modem

ration escape character. ATS13=0&W disables remote configuration.

after making a dial-up connection before it checks the lease line for restoral.

ter after a lease line fails before it attempts a dial-up connection.

conducts an &T test before it returns to the command mode. If the value is zero, the test must be terminated from command mode by issuing an &T0 or H command. When S18 is non-zero, the modem returns the OK message upon test termination.

operates in normal mode with no detected telephone or serial port activity before it enters 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

(async) ignores DTR while taking the action specified 1 ms by &D. (sync)

S26 10 ms 0–255 1 When &R0 is commanded, sets the time

after detecting an OFF-to-ON transition on RTS before the modem turns CTS ON. Applies to synchronous operation only.

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. Applies to asynchronous operation only.

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.

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4 AT Commands, S-Registers, and Result Codes

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

back action to take in the event of an LAPM negotiation failure. These fallback options are initiated immediately upon connection if S48 is set to 128. If an invalid number is entered, S36 acts as if 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. 6 Reserved. 7 An MNP connection is attempted and

if it fails, a normal modem connection

is established.

S37 decimal 0–12 0 Sets the maximum V.34 speed at which the

modem attempts to connect. The default value 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 11,1,300,33600 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-tolow transition of DTR if the modem is programmed to follow the signal), and the disconnect operation. Applies only to errorcorrection 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

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S46 decimal 136, 138 138 Enables or disables data compression:

S48 decimal 0, 7, 128 7 Enables or disables LAPM negotiation. An

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

attempt to deliver data in the buffer until the connection is lost or the data is delivered.

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

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.

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.

S95 decimal 0–15 0 The bits in this register can be set to over-

ride some of the W command options. A bit set to a 1 in this register enables the corresponding result code regardless of the W setting.

Bit 0 CONNECT result code indicates

DCE speed instead of DTE speed.

Bit 1 Append /ARQ to CONNECT XXX

result code in error-correction mode. Bit 2 Enable CARRIER XXXX result code. Bit 3 Enable PROTOCOL XXXX result code. Bit 4 Reserved. Bit 5 Enable COMPRESSION result code. Bit 6 Reserved. Bit 7 Reserved.

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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 2 RING 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

4 AT Commands, S-Registers, and Result Codes

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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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4 AT Commands, S-Registers, and Result Codes

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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Remote

Configuration

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Introduction

Remote configuration is a network management tool that allows you to configure modems anywhere in your network from one location. With password-protected remote configuration, you can issue AT commands to a remote MultiModemII modem for maintenance or troubleshooting as if you were on-site.

Basic Procedure

The following steps are valid regardless of whether the connection is established by the local or the remote MultiModemII modem.

1. Establish a data connection with a remote MT5600BA or MT5600BL modem.

2. Send three asterisks to initiate remote configuration. The remote modem responds:

Online Remote Access Remote password:

3. Type the remote configuration password, and then press ENTER. The default is

“MULTITECH.” It is not case-sensitive.

• If the password is incorrect, the word CONNECT appears, and the local

modem is returned to online mode.

• If the password is correct, an >AT_ command prompt appears.

4. Type AT commands to configure the remote modem. It is not necessary to precede the commands with “AT.”

5. When you have finished configuring the remote modem, type *E and press ENTER to exit remote configuration mode and return to online data mode. You can now break the connection in the normal way.

Note: The dialing command is not allowed in remote configuration mode.

Setup

Multi-Tech modems are shipped with a default setup password (MULTITECH). Because anyone who has an owner’s manual knows the default setup password, for security you should change the password and possibly also the remote configuration escape character.

Changing the Remote Configuration Password

The remote configuration password can be changed only from the front panel of the modem:

1. Turn on the modem.

2. Starting at the STATUS screen, press â â â à à â à to access the ENTER PASSWORD screen.

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3. To change the password, press áß or â to select the first character of the password, and then press à to go to the next character. Repeat until you have entered the entire password.

4. To cancel the new password, press à until the password is erased. To save the new password, press the Enter button. The next time you remotely configure the modem you must use the new password.

Changing the Remote Escape Character

To improve security, you can change a remote modem’s remote configuration escape character. The remote configuration escape character is stored in register S13. The factory default is 42, which is the ASCII code for the asterisk character (*). Setting S13 to 0 (zero) disables remote configuration entirely—but if you do this remotely, you won’t be able to change it back remotely!

1. Establish a remote configuration link with the remote modem as described in “Basic Procedure.”

5 Remote Configuration

2. Type ATS13=n, where n is the ASCII code for the new remote configuration escape character, and then press ENTER.

3. Save the new value by typing AT&W and pressing ENTER.

4. Type ATO<CR> to exit remote configuration.

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Callback

Security

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Introduction

This chapter describes how to use callback security with your modem. Callback security protects your network from unauthorized access and helps control

long distance costs. When callback security is enabled, all callers are requested to enter a password. If the password is invalid, the caller can try twice more before the modem hangs up. If the password is valid, the modem hangs up and returns the call by dialing the phone number associated with the password.

The modem can store up to 30 callback phone numbers and 30 callback passwords. Phone numbers can be up to 30 characters long and can contain the pause (,) and wait (W) characters in addition to the digits and characters normally found on a touch-tone keypad. Passwords can be up to 10 characters long.

Callback phone numbers are associated with callback passwords by being assigned to the same callback memory location. Thus, if you assign the password “APRICOT” to memory location 16 and, in a separate operation, also assign phone number 6127853000 to memory location 16, when the modem receives the password “APRICOT,” it calls phone number 6127853000.

Because there is no way to examine the passwords and phone numbers stored in the modem, it is important to write them down as you enter them. A form that you can print out for this purpose is provided on the last page of this chapter.

Setup Procedures

Turning Callback Security On and Off

Note: Autoanswer must be enabled (S0=1 or S0=2) for callback security to work.

AT Command Method

1. Open a terminal program, such as HyperTerminal.

2. In the terminal window, type one of the following commands:

• To turn on callback security, type AT#DB1 and press ENTER. With remote call-

back security turned on, each caller is asked to enter a password, then is disconnected and called back by the modem. Also, dialing number locations 0–3, for use with the DS=y dialing command, are replaced by callback dialing number locations 1–30.

• To turn off callback security, type AT#DB0 and press ENTER. Callers no longer

need a password to connect to the modem, the modem is unable to call them back, and stored dialing number locations 0–3 become available.

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Front Panel Method

1. Turn on the modem.

2. Starting at the STATUS screen, press the following buttons on the front panel to turn callback security on and off:

• To turn on callback security, press â, â, à, â, â, à, à to display the

CALLBACK ON? option, and then press the Enter button to select the option. When remote callback security is turned on, each caller is asked to enter a password, then is disconnected and called back by the modem. Also, dialing number locations 0–3, for use with the DS=y dialing command, are replaced by callback dialing number locations 1–30.

• To turn off callback security, press â, â, à, â, â, à, à, à to display the

CALLBACK OFF? option, and then press the Enter button to select the option. Callers no longer need a password to connect to the modem, the modem is unable to call them back, and stored dialing number locations 0–3 become available.

Assigning Callback Passwords

6 Callback Security

At Command Method

1. Open a terminal program, such as HyperTerminal.

2. To store a callback password for the first callback memory location, type

3. To store a callback password for the second callback memory location, type

4. Repeat as many times as necessary, up to memory location 30, until all pass-

Front Panel Method

1. Turn on the modem.

2. Starting at the STATUS screen, press the following buttons on the front panel:

3. Press the Enter button on the front panel to select callback memory location 1.

4. Press the áß or â button several times to select the first letter in the password.

5. Press the à button to go to the next letter in the password.

AT#CBP01=xxxxxxxxxx, where xxxxxxxxxx is the first password, and press ENTER. The password must be six to ten characters in length.

AT#CBP02=xxxxxxxxxx, where xxxxxxxxxx is the second password, and press ENTER. Note that the memory location number in the command is incremented by one.

words have been entered.

â, â, à, â, â, à, â, à. The ENTER PASSWORD #1? screen appears.

The ENTER PASSWORD screen appears.

Note: To backspace or to cancel an entry, press à several times.

6. The password must be six to ten characters in length. Repeat steps 4 and 5 until the password is entered, and then press the Enter button to store it. The PASS- WORD STORED screen should appear.

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7. Press the Enter button again to go to the PASSWORD SETUP screen.

8. Press à, à to go to the ENTER PASSWORD #2? screen.

9. Repeat steps 3–7 to enter the next password.

10. Repeat as many times as necessary, up to memory location 30, until all passwords have been entered.

Warning: There is no way to review an entry to confirm that it has been entered correctly. If you attempt to look at a password entry by pressing the Enter button for an ENTER PASSWORD #n? screen, it is possible to accidentally erase the entry.

Assigning Callback Phone Numbers

At Command Method

1. Open a data communication program, such as HyperTerminal.

2. To store a callback phone number in the first memory location, type AT#CBN01=xxxxxxxxxx, where xxxxxxxxxx is the dialing string, and press ENTER. The dialing string can include the digits 0 through 9 and any of the following characters: #, *, comma (,), semicolon (;), W, A, B, C, and D. Up to 30 characters can be used. Example: AT#CBN01=9,16127853000.

3. To store a callback phone number in the second memory location, type

4. Repeat as many times as necessary, through memory location 30, until all dial-

Front Panel Method

1. Turn on the modem.

2. Starting at the STATUS screen, press the following buttons on the front panel:

3. Press the Enter button on the front panel to select memory location 1. The

4. Press the áß or â button several times to select the first digit in the number.

5. Press the à button to go to the next digit in the number.

6. The number can be up to 30 characters in length. Repeat steps 4 and 5 until the

AT#CBN02=xxxxxxxxxx, where xxxxxxxxxx is the dialing string, and press ENTER. Note that the memory location number in the command is incremented by one.

ing strings have been entered.

â, â, à, â, â, à, â, â, à. The ENTER NUMBER #1? screen appears.

ENTER NUMBER screen appears.

Note: To backspace or to cancel an entry, press à several times.

number is entered, and then press the Enter button to store it. The NUMBER STORED screen should appear.

7. Press the Enter button again to go to the CALLBACK NUMBER screen.

8. Press à, à to go to the ENTER NUMBER #2? screen.

9. Repeat steps 3–7 to enter the next number.

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10. Repeat as many times as necessary, up to memory location 30, until all numbers have been entered.

Warning: There is no way to review an entry to confirm that it has been entered correctly. If you attempt to look at a number entry by pressing the Enter button for an ENTER NUMBER #n? screen, it is possible for you to accidentally erase the entry.

Calling Procedure

Use the following procedure to call a modem that has callback security enabled.

Note: Autoanswer must be enabled on the calling modem (S0=1 or S0=2).

1. Using a data communication program such as HyperTerminal, dial the number of the callback modem.

2. When the connection is established, the callback modem responds with a request for a password.

3. Type the password for your modem, and then press ENTER. You have three attempts to enter a valid password or be disconnected.

6 Callback Security

4. If the password is valid, the callback modem disconnects. Then, after a short delay, it calls the number associated with the password and establishes a working connection.

Callback Security Commands

The following AT commands are used with callback security.

Command: #DBnCallback Enable/Disable Values: n = 0 or 1 Default: 0 Description: Enables or disables callback security. When callback security is

#DB0 Disables callback security. #DB1 Enables callback security.

Command: #CBNy=xStore Callback Number

Values: y = 01–30

x = dialing string

Default: None Description: Stores dialing string x in memory location y. The dialing string

can include the digits 0 through 9 and any of the following characters: #, *, comma (,), semicolon (;), W, A, B, C, and D. Up to 30 characters can be used. Example: AT#CBN01=9,16127853000.

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Command: #CBPy=xStore Callback Password Values: y = 01–30

Defaults: None Description: Stores callback security password x in memory location y. The

x = password (6–10 characters)

password must have 6 to 10 characters.

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Callback Assignments

Location Password Phone number

01 02 03 04 05 06 07 08 09 10

6 Callback Security

11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

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Leased Line

Operation

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Introduction

This chapter describes how to use the MultiModemII modem on a leased line. A leased line is a private, permanent, telephone connection between two points.

Unlike normal dialup connections, a leased line is always active. The modems automatically connect when they are attached to the line and are turned on. Because a leased line is always active, one of the two modems on the line must be configured as the originate modem and the other as the answer modem; however, it does not matter which is which.

In the event of an interruption, leased line modems automatically reconnect when the data line or power is restored. The MT5600BL modem also supports dial backup, which enables the modem to automatically switch to a dial-up connection if the leased line goes down.

The MT5600BA modem supports two-wire leased-line operation, while the MT5600BL modem supports both two-wire and four-wire leased line operation.

Two-Wire Setup

1. For two-wire leased line operation on the MT5600BA modem, connect the provided modular telephone cable to the LINE jack. For two-wire leased line operation on the MT5600BL modem, connect the provided modular telephone cable to the LEASED jack. Connect the other end of the cable to the two-wire leased line jack or terminals supplied by the telephone company.

2. Turn on the modem.

3. Starting at the STATUS screen, press the following buttons on the front panel: â, à, â, â, â, à. The CURRENT SETTING= screen appears.

4. If the CURRENT SETTING= screen shows ASYNC AT, press áß and go to step 7. If it shows anything else, press à to go to the ASYNC, NORM? screen.

5. Press the Enter button to select normal asynchronous operation.

6. The OPTION SET screen appears. Press áß to exit to the SYNC/ASYNC OPTIONS screen.

7. Press áß, áß, áß, à, à, à, à. The 2 WIRE LEASE? ORIG screen appears.

8. Choose one of two actions:

• To set up the modem as the originate modem, press the Enter button.

• To set up the modem as the answer modem, press à to display the 2 WIRE

LEASE? ANSWER screen, and then press the Enter button.

Note: One of the modems in a leased line pair must be configured as the origi-

nate modem, and the other as the answer modem, but it does not matter which is which.

9. The OPTION SET screen appears. Press áß to exit to the ONLINE OPTIONS screen, or à to exit to the CURRENT SETTING= screen to verify the selection.

10. Configuration for two-wire leased line operation is now complete. The modem immediately attempts to connect to the modem at the other end of the leased

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line. If the remote modem has not yet been configured for leased line operation, you may turn off the local modem until the remote one is ready.

Four-Wire Setup

1. For four-wire leased line operation, connect one of the provided four-wire cables to the LEASED jack on the back of the MT5600BL modem. Connect the other end of the cable to a four-wire leased line jack or terminals supplied by the telephone company.

2. Turn on the modem.

3. Starting at the STATUS screen, press the following buttons on the front panel: â, à, â, â, â, à, à, à, à. The SYNC, NORM? screen appears.

4. Press the Enter button to select normal synchronous operation.

5. The OPTION SET screen appears. Press áß to exit to the SYNC/ASYNC OPTIONS screen.

6. Press áß, áß, áß, à, à, à, à, à, à. The 4 WIRE LEASE? ORIG screen appears.

7 Leased Line Operation

7. Choose one of two actions:

• To set up the modem as the originate modem, press the Enter button.

• To set up the modem as the answer modem, press à to display the

4 WIRE LEASE? ANSWER screen, and then press the Enter button.

Note: One of the modems in a leased line pair must be configured as the origi-

nate modem, and the other as the answer modem, but it does not matter which is which.

8. The OPTION SET screen appears. Press áß to exit to the ONLINE OPTIONS screen, or à to exit to the CURRENT SETTING= screen.

9. Configuration for four-wire leased line operation is complete. The modem immediately attempts to connect to the modem at the other end of the leased line. If the remote modem has not yet been configured for four-wire leased line operation, you may turn off the local modem until the remote one is ready.

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Dial Backup and Leased Line Restoral

For four-wire leased line operation, the MT5600BL modem has dial backup, in which the modem is connected to a standard dial-up line as well as to the leased line. If the leased line fails, the originate modem automatically dials and connects to the answer modem through the standard telephone network. While it is in dial backup mode, the MT5600BL periodically checks the leased line to see if it is operational. If the line is operational, the modem then attempts to restore the leased line.

The dial-back timer, register S17, determines how long the modem waits after a leased line failure before it attempts a dial backup connection. The S17 default setting is one minute. During that minute, the originate modem tries to establish the leased line link. If the leased line is established during that time, the S17 timer is cleared and everything is back to normal. If the timer expires, the modem attempts a dial backup connection. The purpose of the timer for the answer modem is to determine when it can accept a dial-up call. Dial-back starts only when both timers have expired and the leased line is still down.

The restore timer, register S15, determines how frequently restoral attempts occur when the modems are in dial backup mode. S15 can be set from 10 to 255 minutes in one minute increments. The default value is 30 minutes.

Note: Register S15 must be set identically on both the local and remote modems.

The dial backup number must be set from the front panel of the modem.

Dial Backup and Leased Line Restoral Setup

1. Connect a modular telephone cable to the LINE jack of an MT5600BL modem set up for four-wire leased line operation. Connect the other end of the cable to a standard dialup line jack.

2. Turn on the modem.

3. Starting at the STATUS screen, press the following buttons on the front panel: â, â, à, â, à, à, à. The ENTER NUMBER screen appears.

4. Press the áß or â button several times to select the first digit in the dial backup telephone number.

5. Press the à button to go to the next digit in the number.

Note: To backspace or to cancel an entry, press à several times.

6. The number can be up to 30 characters in length. Repeat steps 4 and 5 until the number is entered, and then press the Enter button to store it. The DIAL BACK- UP # STORED screen appears.

7. Press the Enter button again to go to the DIAL BACKUP NUMBER screen.

Note: Steps 8 through 15 are optional.

8. To change the default restore time, press â, à, à. The ENTER TIME IN MINUTES screen appears.

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7 Leased Line Operation

9. Press the áß or â button several times to select the first digit in the number.

10. Press the à button to go to the next digit in the number.

11. Repeat steps 9 and 10 until you have entered a value between 10 and 255, and then press the Enter button to store it. The TIME STORED screen appears.

12. Press the Enter button to go to the TIME TO RESTORE (S15) screen.

13. To change the default dial backup time, press â, à, à. The ENTER TIME IN MINUTES screen appears.

14. Repeat steps 9 and 10 until you have entered a value between 0 and 255, and then press the Enter button to store it. The TIME STORED screen appears.

15. Press the Enter button again to go to the DIAL BACKUP TIME (S17) screen.

16 . Dial backup and leased line restoral setup is complete.

Note: Registers S15 and S17 can also be changed using the Sr=n AT command. See Chapter 4.

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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, and the liquid crystal display (LCD) should light. If the LEDs and LCD remain off, the modem is probably not receiving power.

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

If the modem is plugged into a power strip, make sure the power strip is plugged in and its power switch is on.

Make sure the transformer 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 another device, such as a lamp, into it.

The modem or transformer module may be defective. If you have another MultiTech modem, try swapping modems. If the problem goes away, the first modem or transformer module may be defective. Call Technical Support for assistance.

CAUTION: Do not under any circumstances replace the transformer module with one designed for another product; doing so can damage the modem and void your warranty.

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8 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 data communication 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 communication program, then type AT and press ENTER. If you get an OK response from your modem, your connections are good and the problem likely is in the connection setup in your communication software.

Try resetting your modem by turning it off and on. If you are using DOS or Windows 3.1 communication 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 communication software. Make sure you have done whatever is necessary in your software to make a port connection. Not all communication 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 communication 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 communication 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 communication port. Be sure to disable any unused ports.

Windows 3.1x: To look for address or IRQ conflicts, in Program Manager select File | Run, type MSD, and press 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.

Windows 9x: Right-click on My Computer, select Properties from the menu, click on the Device Manager tab, double-click on Ports, then double-click on the communication port your modem is connected to. In the port’s Properties sheet, click on the Resources tab to see the port’s input/output range and interrupt request. If another device is using the same address range or IRQ, it appears in the Conflicting Device List. Uncheck Use automatic settings to change the port’s settings so they do not conflict with the other device, or select the port the 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.

Windows NT 4.0: To look for address or IRQ conflicts, click Start, Programs, Administrative Tools (Common), and Windows NT Diagnostics. In the Windows NT Diagnostics dialog box, click the Resources tab to see which input/output ranges and interrupt requests are in use. If you need to open your computer to change switches or jumpers on the conflicting device; refer to the device’s 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 Technical 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 reports 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

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8 Solving Problems

behind a corporate 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).

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 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.

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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.

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, 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.

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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.

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.

8 Solving Problems

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 communication 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 initialization string, and if necessary change it to set the modem to answer after the second ring (S0=2).

Make sure that you have Caller ID service from your telephone company.

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

Communication 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 communication 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 MultiModemII Model Number: MT5600BA or MT5600BL FCC Registration No: AU7USA-33378-M5-E Ringer Equivalence No: 0.1A 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 (612) 785-3500 (612) 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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A Regulatory Compliance

EMC, Safety, and Terminal Directive Compliance

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

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

and

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

and

• Council Directive 98/13/EEC 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

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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Appendix B: Technical Specifications

Your MultiModemII modem meets the following specifications:

Trade Name MultiModemII™ Model Number MT5600BA and MT5600BL Server-to-Client K56flex or V.90 speeds when accessing a K56flex or V.90

Data Rates 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, synchronous and asynchronous Commands AT, V.25bis, TIA/EIA TR.29 Class 2 Command Buffer 40 characters Modem Compatibility ITU-T V.90; K56flex; ITU-T V.34 enhanced, V.34, V.32terbo,

V.32bis, V.32, V.25bis, 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

Error Correction ITU-T V.42 (LAP-M or MNP 3 and 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, 19200, 38400, 57600, 115200, and 230400 bps

Mode of Operation Fax online modes; full duplex over dial-up and two-wire

leased lines; AT command mode

Flow Control XON/XOFF (software), RTS/CTS (hardware) Intelligent Features Plug and play; AT command compatible; autodial, redial,

repeat dial; pulse or tone dial; dial pauses; auto answer; caller ID; remote configuration; adaptive line probing; automatic symbol and carrier frequency during start-up, retrain, and rate renegotiation; DTMF detection; call status display, auto-parity and data rate selection; keyboard- and front panel-controlled modem options; monitor and LCD displays for modem options; non-volatile memory; storage of up to four command strings or telephone numbers of up to 30 characters each

*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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B Technical Specifications

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

9600 bps (non-trellis), QAM with trellis-coded modulation (TCM) at 9600, 12,000, 14,400, 16,800, 19,200, 21,600, 24,000, 26,400, 28,800, 31,200, 33,600, and 56,000 bps

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

V.27ter DPSK at 4800 and 2400 bps V.29 QAM at 9600 and 7200 bps V.17TCM at 14400, 12000, 9600, and 7200 bps

Carrier Frequencies 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

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

Transmission Level -11 dBm (dial-up), -9 dBm (leased-line) Frequency Stability ±0.01%

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Receiver Sensitivity -43 dBm under worst-case conditions AGC Dynamic Range 43 dB Interface TIA/EIA RS-232C/ITU-T V.24/V.28 Connectors DB25F RS-232C connector; two RJ-11 phone jacks (BA mod-

Cables One 14-foot RJ-11 phone cable (USA); country-specific cord

Diagnostics Power-on self test, local analog loop, local digital loop, re-

Indicators 32-character backlit LCD for status and configuration infor-

Speaker 1-inch speaker for call progress monitoring

el) or three RJ-11 phone jacks (BL model); power connector

for UK and International models; external power transformer and cord

Note: Any cables connected to the computer should be shielded to reduce interference.

mote digital loop

mation; LEDs for Transmit Data, Receive Data, Carrier Detect, Off Hook, Terminal Ready, and Test Mode

Manual Controls Power switch, speaker volume control, four LCD control

buttons

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

20–90% (non-condensing)

Power Requirement 120 VAC, 60 Hz, 16 W; 230V/50 Hz optional (international) Power Consumption 12 W @ 0.1 A Dimensions 15.8 cm wide × 22.9 cm long × 3.6 cm high (6.2" × 9.0" × 1.4") Weight 0.9 kg (2 lb.) Limited Warranty 10 years

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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 UUUUUUUUUUUU

Digital Analog

Computer or Terminal

Figure C-1. Local analog loopback test.

Local MultiModem

Test procedure

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

2. Type AT and press ENTER; you should get an OK message. Type AT\N and press ENTER to disable error correction.

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MultiModemII User Guide

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

4. Note that the CD and TM indicators are on. If they are not on, there is a defect in your modem.

5. 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.

6. 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.

7. 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.

Note: You can also start and stop an analog loopback test by using the front panel LCD and buttons. See “Diagnostic Options Trunk” in Chapter 3.

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 UUUUUUUUUUU UUU

Figure C-2. Remote digital loopback test.

Test procedure

Computer or Terminal

Digital Analog

Local MultiModem Remote MultiModem Computer or Terminal

DigitalAnalog

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.

Multi-Tech Systems MT5600BL, MT5600BA User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

Product Description

Features

What Is in Your Modem Package?

Related Manuals

Introduction

What You Will Need

Safety Warnings

Step 1: Connect the Modem to Your System

RS232 Connection

Dialup Connection

Two-Wire Leased Line Connection

Four-Wire Leased Line Connection

Phone Connection

Power Connection

Surge Protectors and Lightning

Power-On Test

Step 2: Install the Modem in Windows

Adding the Modem to Windows

Removing Your Old Modem from Windows

Step 3: Install and Configure Your Software

Step 4: Call the Multi-Tech BBS

Trio DataComm

Windows HyperTerminal

Windows Terminal

Step 5: Send a Fax

Trio Fax

Microsoft Fax

References

Introduction

Modem Configuration

LED Indicators

Liquid Crystal Display (LCD)

Option Selection

Menu Structure

Menu Overview

Status Trunk

Basic Options Trunk

Advanced Options Trunk

Remote Configuration Options Trunk

Diagnostic Options Trunk

Phone Number Memory Options Trunk

Caller ID Options Trunk

Menu Options

Status

Basic Options

Advanced Options

Remote Configuration Options

Diagnostic Options

Phone Number Memory Options

Caller ID Options

Introduction

AT Commands

S-Registers

Result Codes

Introduction

Basic Procedure

Setup

Changing the Remote Configuration Password

Changing the Remote Escape Character

Introduction

Setup Procedures

Turning Callback Security On and Off

Assigning Callback Passwords

Assigning Callback Phone Numbers

Calling Procedure

Callback Security Commands

Introduction

Two-Wire Setup

Four-Wire Setup

Dial Backup and Leased Line Restoral

Dial Backup and Leased Line Restoral Setup

Introduction

None of the Indicators Light

The Modem Does Not Respond to Commands

The Modem Dials But Cannot Connect