Multitech MT2834MR Manuale utente

PN 88300150

4/3/01 1

MT2834MR, MT2834MRI, and

MT2834MRK

Owner’s Manual

PN 88300150

4/3/01 2

MT2834MR, MT2834MRI, MT2834MRK

Owner’s Manual

MOD PN 88300150 Version 1.00 - 4/3/01

(Replaces Manual PN 82035706 Rev. G)

This publication may not be reproduced, in whole or in part, without prior expressed written permission from Multi-

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 from time to time 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

F08/19/96 Manual revised to include technical and editorial changes

throughout the manual.

G11/11/96 Manual revised to include the Firmware Version 1.11 Product

Update, PN 82053850.

H4/3/01 Manual revised and reformatted for distribution on diskette.

TRADEMARKS

Trademarks of Multi-Tech Systems, Inc. are as follows: MultiModem, MultiModemII, MultiModemManager,

MultiExpress, MultiExpressFax, Multi-Tech and the Multi-Tech logo.

MNP and Microcom Network Protocol are trademarks of Microcom Inc.

AS/400 and System/3x is a trademark of IBM.

Macintosh is a trademark of Apple Computer Inc.

Unix is a trademark of X/Open Co. Ltd.

AT&T is a trademark of American Telephone and Telegraph Company.

PATENTS

This device covered by one or more of the following patents: 6,031,867; 6,012,113; 6,009,082; 5,905,794;

5,864,560; 5,815,567; 5,815,503; 5,812,534; 5,809,068; 5,790,532; 5,764,628; 5,764,627; 5,754,589; D394,250;

5,724,356; 5,673,268; 5,673,257; 5,644,594; 5,628,030; 5,619,508; 5,617,423; 5,600,649; 5,592,586; 5,577,041;

5,574,725; D374,222; 5,559,793; 5,546,448; 5,546,395; 5,535,204; 5,500,859; 5,471,470; 5,463,616; 5,453,986;

5,452,289; 5,450,425; D361,764; D355,658; D355,653; D353,598; D353,144; 5,355,365; 5,309,562; 5,301,274

Other Patents Pending

Multi-Tech Systems, Inc.

2205 Woodale Drive

Mounds View, Minnesota 55112 U.S.A.

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

U.S. Fax (763) 785-9874

Technical Support (800) 972-2439

Internet Address: http://www.multitech.com

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CHAPTER 1 - INTRODUCTION AND DESCRIPTION

1.1 Introduction.................................................................................6

1.2 How To Use This Manual ...........................................................6

1.3 Description..................................................................................7

1.4 FCC Regulations for Telephone Line Interconnection................8

1.5 Canadian Limitations Notice.....................................................10

1.6 Compliance with BABT Requirements (MT2834MRK only).....11

1.7 Technical Specifications...........................................................11

1.8 Power........................................................................................13

1.9 Modem LED Indicators.............................................................13

1.10 BUSY Switch.............................................................................14

1.11 Controls on PC Board...............................................................14

1.12 MT2834MRK Installation Notes................................................14

CHAPTER 2 - DIALING AND ANSWERING

2.1 Introduction...............................................................................15

2.2 Automatic Leased Line Restoral Operation..............................15

2.3 Manual Dial Backup Call Termination.......................................15

2.4 Dial Back-up Leased Line Restoral ..........................................16

2.5 Dial-up Automatic Answering....................................................16

2.6 Dial-up Handshaking Details ....................................................16

2.7 Call Termination........................................................................16

CHAPTER 3 - COMMAND MODE OPERATION

3.1 Introduction...............................................................................18

3.2 Typographic Conventions Used in This Manual.......................18

3.3 Functional Modes .....................................................................19

3.4 AT Commands..........................................................................21

3.5 Result Codes ............................................................................24

3.6 Command Mode Fundamentals ...............................................26

3.7 Dialing Commands ...................................................................32

3.8 Immediate Action Commands...................................................34

3.9 Configuration Commands.........................................................36

CHAPTER 4 - S-REGISTERS

4.1 Introduction...............................................................................38

4.2 Reading and Assigning S-Register Values...............................38

4.3 AT Commands that Affect S-Registers.....................................42

4.4 Summary...................................................................................43

CHAPTER 5 - ERROR CORRECTION, DATA COMPRESSION AND

SPEED CONVERSION

5.1 Introduction...............................................................................45

5.2 How V.42 Detects and Corrects Errors.....................................46

5.3 Data Compression....................................................................47

5.4 MNP Classes............................................................................48

5.5 V.42 Mode Select Command (#L) ............................................48

5.6 Modes of Operation ..................................................................49

5.7 Introduction to Flow Control......................................................49

5.8 Modem-Initiated Flow Control...................................................50

5.9 Terminal/Computer-Initiated Pacing (&E13).............................50

5.10 Xon/Xoff Pass-Through (&E7)..................................................51

5.11 Normal Mode Modem Flow Control (&E10 and &E11).............52

5.12 Hewlett Packard ENQ/ACK Pacing (&E9)................................52

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5.13 Compression, Error Correction, Flow Control,..........................53

5.14 Pass Through and Pacing Commands.....................................54

5.14 Error Correction Result Codes..................................................54

5.15 Speed Conversion ....................................................................55

5.16 Related Commands..................................................................55

5.17 Summary...................................................................................56

CHAPTER 6 - TESTING YOUR MODEM

6.1 Introduction ..............................................................................57

6.2 Local Analog Loopback Test/V.54 Loop 3 ...............................57

6.3 Digital Loopback Test/V.54 Loop 2 (Local/Manual)..................57

6.4 Digital Loopback Test/V.54 Loop 2 (Remote/Automatic)..........58

6.5 Back-to-Back Test ....................................................................59

6.6 Synchronous Mode Testing......................................................60

6.7 Local Analog Loopback Test (Sync. Mode)..............................61

6.8 Digital Loopback Test (Local/Manual) (Sync. Mode)................62

6.9 Digital Loopback Test (Remote/Automatic) (Sync. Mode)........63

CHAPTER 7 - DIP-SWITCHES AND JUMPERS

7.1 Introduction...............................................................................64

7.2 16-Position DIP-Switches.........................................................65

7.3 16-Position DIP-Switch Settings...............................................68

7.4 Jumper Settings........................................................................70

CHAPTER 8 - SERVICE, WARRANTY & TECH SUPPORT

8.1 Introduction...............................................................................72

8.2 Limited Warranty.......................................................................72

8.3 Tech Support ............................................................................72

8.4 Service......................................................................................72

8.7 How to Find Multi-Tech on the Internet.....................................73

8.9 Upgrading the MT2834MR Firmware .......................................73

APPENDICES

Appendix A - ASCII Codes/Hex/Decimal Conversion Chart............74

Appendix B - Dial Pulse and Tone Frequencies..............................75

Appendix C - DIP-Switch Summary.................................................77

Appendix D - Result Code Summary...............................................78

Appendix E - S-Register Summary..................................................80

Appendix F - AT Command Summary.............................................81

Appendix G - V.25bis Operation ......................................................85

Appendix H - RS232C Interface Specifications...............................93

Appendix I - Cable and Connector Diagrams.................................96

Appendix J - Escape Methods Used by Multi-Tech Systems .......100

Appendix K - Remote Configuration..............................................103

Appendix L - MT2834MRI PC Board ............................................104

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1.1 Introduction

Welcome to the world of data communications. You have acquired one of the finest rack-mount intelligent

modems available, the MT2834MR, from Multi-Tech Systems. This owner’s manual will help you install,

configure, test, and use your modem.

Your MT2834MR is designed to operate in two modes. First, it functions as a 33,600 bps leased line

modem with dialback security. Communications over leased lines have been popular for many years

primarily over 4-wire lines using V.29 modulation techniques. There have been dial back-up features in

some leased line modems, but the dial back-up was at a slower speed. Your MT2834MR uses V.34

modulation that is designed for full 33,600 bps full duplex operation over 2-wires. That means when the

MT2834MR uses its dial back-up capability, performance does not suffer.

The second MT2834MR mode of operation is as a standard ITU-T V.34 2-wire dial-up modem. As such,

it has incorporated all the advanced features of other Multi-Tech intelligent modems.

This manual documents all of the MT2834MR’s features and capabilities, such as autodial, auto-answer,

auto-fallback, number linking, option switches, phone number memory, call progress detection, and more.

The next section will show you how to use this manual. The contents of each chapter are listed, so you

will know where to turn for specific information.

1.2 How To Use This Manual

This manual is divided into eight chapters. There are also several appendices at the end of the manual,

most of which repeat information contained in the chapters, but in a more condensed form. The

information contained in each chapter and appendix is as follows:

Chapter 1 - Introduction & Description

This chapter begins with a short introduction, followed by a guide (which you are now reading) to the use

of the manual. We then provide a more detailed description of the modem, as well as a chart containing

the modem’s technical specifications. This is then followed by sections covering power, LED indicators

and a brief summary of modem switch options. (Chapter 7 covers switch settings more thoroughly.)

Chapter 2 - Dialing and Answering

This chapter covers Answer mode operation in detail, as well as the handshaking procedures between

two modems and an auto-answer application. Various methods of call termination are also discussed.

Chapter 3 - Command Mode Operation

This may be the most important chapter of this manual. It begins with an introduction and discussion of

the MT2834MR’s Command mode fundamentals. A flow chart is provided to illustrate Command mode

and On-Line mode operation and the methods used to enter each mode. Next, there is a summary of the

modem’s commands and responses. We then go into a detailed explanation of each command, providing

examples where applicable.

Chapter 4 - S-Registers

This chapter covers the MT2834MR’s S-Registers, which are used to store and/or configure various

modem options. All of the S-Registers are defined and explained, followed by instructions on accessing

the S-Registers and reading or changing their values.

Chapter 5 - Error Correction, Data Compression and Speed Conversion

This chapter provides information concerning some of the advanced features of the MT2834MR. Features

such as V.42 Error Correction, MNP 5 Data Compression, Speed Conversion and others enable your

MT2834MR to operate at a higher level of efficiency than possible with standard AT command set

features.

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Chapter 6 - Testing Your Modem

This chapter provides information on loopback testing for your MT2834MR.

Chapter 7 - DIP Switches and Jumpers

The MT2834MR’s printed circuit board options are covered in this chapter. The DIP switch settings and

on-board jumper plugs are explained in detail, including all default settings.

Chapter 8 - Service, Warranty and Tech Support

This chapter provides instructions for getting modems serviced at the factory, a statement of limited two-

year warranty and information about Multi-Tech's Technical Support. Information on the modem upgrade

feature is also provided.

Appendix A - ASCII/HEX/Decimal Conversion Chart

Appendix B - Dial Pulses and Tone Dial Frequencies

Appendix C - DIP-Switch Summary

Appendix D - Result Code Summary

Appendix E - S-Register Summary

Appendix F - AT Command Summary

Appendix G - V.25bis Operation

Appendix H - RS232C Interface Specifications

Appendix I - Cable and Connector Diagrams

Appendix J - Escape Sequences Used by Multi-Tech Systems

Appendix K - Remote Configuration

Appendix L – MT2834MRI PC Board

1.3 Description

Each MT2834MR card has three integrated 33,600 bps MultiModems. Each of the three modems on the

MT2834MR card can be configured independently from each other via the MultiCommManager (Model

#MR4800). The rack can support and control up to 16 MultiModem cards, to a total of 48 modems per

rack. Up to 254 racks can be networked, for a total of 12,192 modems on the network under control of a

single PC. Refer to your MultiCommManager Owner’s Manual for more information on the rack and its

components.

Perhaps the most significant extras incorporated in the MT2834MR are its V.42 error correction and

V.42bis data compression features. With error correction and data compression, transmission errors are

eliminated while increasing the modem’s throughput by a ratio of up to 4:1, for an effective overall

transmission rate approaching 115,200 bps.

The MT2834MR offers interactive automatic dialing capability, as well as Command Mode option

configuration. Up to ten command line/telephone numbers, of up to 60 digits each, can be stored in the

modem’s non-volatile memory. The modem uses pulse and/or tone dialing methods, and has the ability to

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

The MT2834MR is FCC-Registered for direct connection to the public telephone networks. No Data

Access Arrangements (DAA’s) are required.

The MT2834MR is fully compatible with the Standard AT command set, and is therefore compatible with

all of the popular communications software packages.

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1.4 FCC Regulations for Telephone Line Interconnection

1. 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. Contact Multi-Tech Systems, Inc. for

details of how to have repairs made.

2. When trouble is experienced, you must disconnect your modem from the telephone company’s jack

to determine the cause of the trouble, and reconnect your modem only when the trouble is corrected.

3. The modem cannot be connected to pay telephones or party lines.

4. If requested by the telephone company, you must notify them of the following before the MT2834MR

is installed:

a. The particular phone line (phone number) to which the connection is to be made.

b. The FCC Registration Number: AU7USA-20673-MM-E

c. The Ringer Equivalence: 0.3B

d. Modems can only be connected to the phone lines through standard modular jacks. The Uniform

Service Order Code (U.S.O.C.) for the standard modular jack which connect the modem to the phone

lines are:

RJ11C or RJ11W (single line)

e. The manufacturer’s name and model number:

Multi-Tech Systems - Model MT2834MR

5. If the telephone company notifies you that your device is causing harm, unplug it. The telephone

company may disconnect your service if necessary and also may change its facilities, equipment,

operations or procedures which may affect operation of your equipment. Where practical, the

telephone company must promptly inform you in writing of the temporary disconnect or change in

service, give you the opportunity to make changes allowing uninterrupted service, and inform you of

your rights to bring a complaint to the FCC.

1.4.1 FCC Fax Update

The Telephone Consumer Protection Act of 1991 makes it unlawful for any person to use a computer or

other electronic device to send any message via a telephone fax machine unless such message clearly

contains in a margin at the top or bottom of each page or the first page of the transmission, the date and

time it is sent and an identification of the business or other entity, or other individual sending the message

and the telephone number of the sending machine or such business, other entity, or individual.

See the cover page of your fax software manual for setup details.

1.5 Canadian Limitations Notice

NOTICE: The Canadian Department of Communications label identifies certificated equipment. This

certification means that the equipment meets certain telecommunications network protective, operational

and safety requirements. The Department 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. In some cases, the company’s inside wiring associated with a single line individual

service may be extended by means of a certified connector assembly (telephone extension cord). The

customer should be aware that compliance with the above conditions may not prevent degradation of

service in some situations.

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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.

The Load Number (LN) assigned to each terminal device denotes the percentage of the total load to be

connected to a telephone loop which is used by the device, to prevent overloading. The termination on a

loop may consist of any combination of devices subject only to the requirement that the total of the Load

Numbers of all the devices does not exceed 100. The Load Number for this product is 5.

CAUTION: Users should not attempt to make such connections themselves, but should contact the

appropriate electric inspection authority, or electrician, as appropriate.”

This digital apparatus does not exceed the Class A limits for radio noise for digital apparatus set out in

Department of Communications.

1.6 Compliance with BABT Requirements (MT2834MRK only)

European Low Voltage Directive

When correctly installed and maintained, the modem will present no hazard to the user. When correctly

installed the modem will be connected to the PSTN or a PW and to a Data Terminal Equipment (DTE),

whose modem connections comply with ITU-T recommendation V28. The DTE connections are therefore

taken to be safe voltages (less than +30 volts).

Approved for connection to telecommunications system specified in the instructions for use subject to the

conditions set out in them Approval no. NS/3422/23/N/603030 (Model #MT2834MRK).

Compliance with BS6305 Clause 6.2 BS6320 Clause 7.2 and BABT/SITS/82/005S/D

a. The modem is suitable for connection to the Public Switched Telephone Network (PSTN) provided by

British Telecommunications pic or Kingston Communications (Hull) plc. Circuit supply by British

Communications, Mercury Communication or Hull City Council. Only direct exchange lines may be used,

not shared service. The modem may be connected to private speech band.

b. The modem is suitable for household, office and similar general indoor use. It is not suitable for use

as an extension to a payphone.

c. BT lines supplied must support either loop disconnect or multifrequency tone signalling.

d. REN (Ringer Equivalence Number).

The REN value of a unit is calculated from 3/n where n is the total number of units which can be

connected in parallel which will still cause the standard bell (as defined in BS6305 Appendix D) to ring.

REN values of less than 0.3 cannot be assigned. For apparatus which is not capable of forming part of a

multiple installation, a REN value of 3 is assigned.

REN = 1

If a telephone or other device is connected in parallel with the modem, the combined REN must not

exceed 4. A BT supplied telephone may be assumed to have REN of 1.0 unless otherwise noted.

The approval of this modem for connection to the British Telecom public switched telephone network is

INVALIDATED if the apparatus is subject to modification in any material way not authorized by BABT or if

it is used with or connected to:

i. internal software that has not been formally accepted BABT.

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4/3/01 9

ii. external control software or external control apparatus which cause the operation of the modem

associated call set-up equipment to contravene the requirements of the standard set out in

BABT/SITS/82/005S/D.

All apparatus connected to this modem and thereby connected directly or indirectly to the British Telecom

public switched telephone network must be approved apparatus as defined in Section 22 of the British

Telecommunications Act 1984.

Compliance with BS6789: Section 3.1 and Part 2

a. The modem is not capable of allowing Auto Call using ‘999’or other PABX emergency numbers.

b. Modes, other than modes 1,2 or 3 should not be used on the BT PSTN. This modem is a mode 1

device.

c. Users are advised to check the numbers entered during the Auto Call set up phase prior to dialing.

d. The user should not issue any sequence of commands to the modem which would cause the modem

to exceed the maximum allowable pause of 8 seconds from the time the modem goes off hook until

dialing begins.

Compliance with BS6328 Part 1 and BABT/SITS/82/01/C (Use on Private Circuits)

a. The modem is not suitable for use on circuits with British Telecommunications signaling at a nominal

frequency of 2280Hz.

b. The modem does not require signaling or otherwise employ the frequency range dc to 200Hz.

c. The modem may be connected directly to a point-to-point two-wire or four-wire Private Circuit.

d. The modem does not require dc from the Private Circuit for correct operation. The modem may be

damaged if connected, in private circuit mode, to a circuit supplying dc current (the maximum permissible

direct current is zero amps).

e. The approval of this modem for connection to British Telecom Private Speech band circuits is

INVALIDATED if the apparatus is subject to any modification in any material way not authorized by

BABT or if it is used with, or connected to:

i) internal software that has not been formally accepted by BABT.

ii) external control software or external control apparatus which cause the operation of the modem

or associated call set-up equipment to contravene the requirements of the standard set out in

BABT/SITS/82/01/C.

All apparatus connected to this modem and thereby connected directly or indirectly to British Telecom

Private Speechband circuits must be approved apparatus as defined in Section 16 of the British

Telecommunications Act. 1981.

Compliance with DTI 83/009

a. The apparatus is only approved for compatible PBXs. Consult the supplier for an up to date list of

compatible PBXs.

b. There is no guarantee of correct working in all circumstances. Any difficulties should be referred to

Multi-Tech.

c. If sockets are required for connection to the PBX, use the BT post card only if BT owns the wiring to

the PBX.

PN 88300150

4/3/01 10

This apparatus has been approved for the use of the following facilities:

·Auto-calling

·Loop disconnect and MF dialing

·Phone number storage and retrieval by

a predetermined code

·Operation in the absence of proceed indication

·Detection of initial and secondary proceed indication

·Automatic storage of last number dialed

·Tone detection-busy

·Auto clear from the originating end

·DTR dialing

·Modem

·PBX timed break register recall

Any other usage will invalidate the approval of the apparatus if as a result, it then ceases to comply with

the standards against which approval was granted.

1.7 Technical Specifications

Tradename MultiModemV34

Model Number MT2834MR, MT2834MRK, MT2834MRI

Data Rates (bps) Three independent modems

(Modem A, B, C) each operating at 33,600, 31,200, 28,800, 26,400, 24,000,

21,600, 19,200, 16,800, 14,400, 12,000, 9600, 4800, 2400, 1200, or 0-300 bps

Data Format Serial, binary, asynchronous at 0-300, 1200, 2400, 4800, 9600, 14,000, 16,800,

19,200, 21,600, 24,000, 26,400, 28,800, 31,200, or 33,600 bps;

synchronous at 1200, 2400, 4800, 9600, 14,400, 16,800, 19,200, 21,600, 24,000,

26,400, 28,800, 31,200, or 33,600 bps.

Configuration Each of the card’s 3 modems are independently configurable

Compatibility ITU-T V.42, V.42bis, V.34, AT&T V.32terbo, ITU-T V.32, V.32bis, V.25bis, V.21,

V.22bis, V.22, V.23, V.17, Bell 212A* and 103/113*

Error Correction MNP®Classes 3, 4, and LAPM

Data Compression MNP 5, and V.42bis

Speed Conversion Serial port data rates adjustable to 300, 1200, 2400, 4800,9600, 19,200, 38,400,

57,600, 115,200 bps

Flow Control Xon/Xoff, Hardware CTS/RTS, ENQ/ACK

Mode of Operation Full over both dial-up lines and 2-wire or 4-wire leased lines; automatic Dialback-up

on separate lines in leased line operation, in dial-up mode; automatic or manual

dialing, automatic or manual answer.

Intelligent Features “Standard AT”command compatible, autodial, redial, repeat dial*, dial linking*,

pulse or tone dial, dial pauses, call status display, auto-parity and data rate

selection, keyboard-controlled modem options, non-volatile memory, Caller ID

(optional feature), and on-screen displays for modem option parameters and up to

ten telephone numbers/command lines of up to 60 digits each, help menus, remote

configuration, and V.25bis dialing.

Commands 100% compatible with “Standard AT"

Compatibility Command Set

Command Buffer 60 characters

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