Multitech MultiModem MT2834MR6 Manual de usuario

MultiModem

MT2834MR6

User Guide

MultiModem MT2834MR6 User Guide

PN: S000326A

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 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.

Revision Date Description

A 12/30/2003 Initial release of MT2834MR6 User Manual on CD.

Trademarks

Trademarks of Multi-Tech Systems, Inc. are as follows: MultiExpress, MultiExpressFax, MultiModemII, Multi-Tech and the

Multi-Tech logo. Windows is a registered trademark of Microsoft Corporation.

Technical Support

France [email protected] +33 1-64 61 09 81

India [email protected] +91 124 6340778

U.K. [email protected] +44 118 959 7774

U.S., Canada [email protected] (800) 972-2439

Rest of World [email protected] +763 717-5863

World Headquarters

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

www.multitech.com

Contents

Chapter 1 - Introduction..................................................................................... 7

1.1 Introduction ............................................................................................. 8

1.2 ManualOrganization............................................................................... 8

1.3 Description ............................................................................................. 9

1.4 FCC Regulations forTelephone Line Interconnection........................... 10

1.4.1 FCCFaxUpdate .................................................................................10

1.5 Canadian Limitations Notice................................................................. 11

1.6 Technical Specifications ....................................................................... 12

1.7 Power Supply ....................................................................................... 14

1.8 Modem LED Indicators ......................................................................... 15

1.9 Busy Switch ......................................................................................... 15

1.10 MT2834MR6Installation Notes ............................................................. 16

1.11 Safety Warnings ................................................................................... 16

Chapter 2 - Dialing and Answering ................................................................. 17

2.1 Introduction ........................................................................................... 18

2.2 Dial-UpAutomaticAnswering ............................................................... 18

2.3 Dial-UpHandshaking Details................................................................ 18

2.4 CallTermination.................................................................................... 19

Chapter 3 - AT Commands .............................................................................. 20

3.1 Working with AT Commands................................................................ 21

3.1.1 ModesofOperation ............................................................................21

3.2.2 CommandStructure ............................................................................22

3.3.3 CommandEditing ...............................................................................22

3.2 Dialing Commands............................................................................... 26

3.3 Dial Modifier Commands ...................................................................... 27

3.4 Phone Number Memory Commands.................................................... 30

3.5 Configuration Storage and Recall Commands ..................................... 32

3.6 Modem Response (Result Code) Commands..................................... 34

3.7 Online Connection Commands ............................................................ 36

3.8 V.34 Commands................................................................................... 40

3.9 RS-232 Interface Commands .............................................................. 41

3.10 Error Correction and Data Compression Commands.......................... 43

3.11 Speed Conversion Commands ............................................................ 45

3.12 Immediate Action Commands .............................................................. 47

3.12 Flow Control Commands ..................................................................... 49

3.13 Escape Sequences .............................................................................. 52

3.14 Remote Configuration Commands....................................................... 53

3.15 Line Probe Commands ........................................................................ 54

3.16 Diagnostic Commands......................................................................... 55

Chapter 4 - S-Registers.................................................................................... 56

4.1 Introduction ........................................................................................... 57

4.2 S-Registers .......................................................................................... 57

4.3 Reading andAssigning S-Register Values ........................................... 63

4.3.1 Examples of Assigning Values ...........................................................63

4.3.2 Examples of Reading Values..............................................................63

4.4 AT Commands Affecting S-Registers................................................... 64

Chapter 5 - Error Correction, Data Compression & Speed Conversion..... 65

5.1 Introduction ........................................................................................... 66

5.2 How V.42 Detects and Corrects Errors ................................................ 67

5.3 Data Compression ............................................................................... 68

5.4 MNP Classes........................................................................................ 68

5.5 V.42 Mode Select Command (#L)......................................................... 69

5.5.1 #L0Command.....................................................................................69

5.5.1.1 OriginateMode ................................................................................69

5.5.1.2 AnswerMode...................................................................................69

5.5.2 #L1Command.....................................................................................69

5.5.3 #L2Command ....................................................................................69

5.5.4 #L3Command.....................................................................................69

5.6 Modes of Operation .............................................................................. 70

5.6.1 Non-ErrorCorrectionMode(&E0)........................................................70

5.6.2 ReliableMode(&E2) ...........................................................................70

5.6.3 AutoreliableMode(&E1) .....................................................................70

5.7 Flow Control ......................................................................................... 71

5.8 Modem-InitiatedFlow Control ............................................................... 72

5.8.1 XON/XOFFFlowControl(&E5)...........................................................72

5.8.2 HardwareFlowControl(&E4) ..............................................................72

5.9 Pacing (&E13) ...................................................................................... 73

5.9.1 XON/XOFFPass-Through(&E7) ........................................................73

5.9.2 Non-ErrorCorrectionModeFlowControl(&E10and&E11).................73

5.9.3 HewlettPackardENQ/ACKPacing(&E9)...........................................73

5.10 Compression, Error Correction, Flow Control,

and Pacing Commands........................................................................ 74

5.10.1 V.42ErrorCorrectionModes ..............................................................74

5.10.2 Modem-InitiatedFlowControl .............................................................74

5.10.3 XON/XOFFPass-Through ..................................................................74

5.10.4 HewlettPackard ENQ/ACK Pacing.....................................................74

5.10.5 Non-ErrorCorrectionModeFlowControl .............................................74

5.10.6 Pacing(Computer-InitiatedFlowControl)............................................74

5.10.7 DataCompression ..............................................................................74

5.11 Result Codes........................................................................................ 75

5.11.1 MNPErrorCorrection..........................................................................75

5.11.2 LAP-MErrorCorrection.......................................................................75

5.11.3 DataCompression ..............................................................................75

5.12 Speed Conversion ................................................................................ 75

5.12.1 Baud Adjust ($BA) .............................................................................. 76

5.12.2 ModemBaudRate($MB)....................................................................76

5.12.3 Serial Port Baud Rate ($SB) ............................................................... 77

5.13 Related Commands ............................................................................. 78

5.13.1 AutoreliableBuffering($A) ..................................................................78

5.13.2 Maximum Block Size (&BS) ...............................................................78

5.13.3 AutoreliableFallbackCharacter($F) ...................................................78

5.13.4 RetransmitCount($R) ........................................................................79

5.13.5 V.42ErrorCorrectionat300bps($E) .................................................79

5.14 Summary.............................................................................................. 79

Chapter 6 - Testing & Troubleshooting.......................................................... 80

6.1 Introduction ........................................................................................... 81

6.2 LocalAnalog Loopback Test (V.54 Loop 3) ........................................... 82

6.2.1 TestProcedure ...................................................................................82

6.3 Remote Digital Loopback Test (V.54 Loop 2)........................................ 83

6.3.1 TestProcedure ...................................................................................83

6.4 Local Digital Loopback Test (V.54 Loop 2)............................................ 84

6.4.1 TestProcedure ...................................................................................84

Chapter 7 - Warranty & Service....................................................................... 85

7.1 Multi-Tech Systems, Inc. Warranty & Repairs Policies......................... 86

7.1.1 Warranty .............................................................................................86

7.1.2 U.S.andCanadianCustomers............................................................86

7.1.3 InternationalCustomers(outsideU.S.A.andCanada)........................87

7.1.4 InternationalDistributors .....................................................................87

7.2 Repairs................................................................................................. 88

7.2.1 RepairProceduresforU.S.andCanadianCustomers ........................88

7.2.2 RepairProceduresforInternationalCustomers...................................88

7.2.3 RepairProceduresforInternationalDistributors..................................89

7.2.4 ReplacementParts .............................................................................89

7.3 Technical Support................................................................................. 89

7.4 InternetSite .......................................................................................... 89

Appendices........................................................................................................ 90

AppendixA..................................................................................................... 91

ASCIIConversionChart...................................................................................91

AppendixB .................................................................................................... 92

Dial Pulses ......................................................................................................92

ToneDialFrequencies .....................................................................................93

AppendixC .................................................................................................... 94

ResultCodeSummary.....................................................................................94

AppendixD .................................................................................................... 96

S-RegisterSummary .......................................................................................96

AppendixE .................................................................................................... 98

ATCommandSummary ..................................................................................98

AppendixF................................................................................................... 106

RS-232CInterfaceSpecifications .................................................................. 106

FunctionalDescriptionof theRS-232C Signals ............................................. 107

Transmitted Data (TD) — Pin 2 ...................................................................... 107

Received Data (RD) — Pin 3.......................................................................... 107

RequestTo Send (RTS) — Pin 4 .................................................................... 107

ClearTo Send (CTS) — Pin 5......................................................................... 107

Data Set Ready (DSR) — Pin 6 ..................................................................... 107

Signal Ground (SG) — Pin 7 .......................................................................... 107

Carrier Detect (CD)— Pin 8 ........................................................................... 107

TestVoltage (+V) — Pin 9 .............................................................................. 108

High Speed (HS) — Pin 12............................................................................. 108

Transmit Clock (TC) — Pin 15........................................................................ 108

Receive Clock (RC) — Pin 17 ........................................................................ 108

DataTerminal Ready (DTR) —Pin 20 ............................................................ 108

Ring Indicator (RI) — Pin 22 .......................................................................... 109

ExternalTransmit Clock (XTC) — Pin 24........................................................ 109

Terminal Busy (OOS) — Pin 25...................................................................... 109

AppendixG .................................................................................................. 110

CableandConnectorDiagrams ..................................................................... 110

APPENDIXH ................................................................................................111

Introduction to MultiTech Escape Methods ................................................... 111

How to Select an Escape Method..................................................................112

Escape Method 1:+++AT<CR> ..................................................................... 112

Escape Method 2:<BREAK>AT<CR> ........................................................... 112

S-RegistersandEscape Sequence ............................................................... 113

Abortingan EscapeSequence ...................................................................... 113

APPENDIXI................................................................................................. 114

IntroductiontoRemoteConfiguration............................................................. 114

BasicProcedure ............................................................................................ 114

Setup 114

ChangingthePasswords ............................................................................... 115

ChangingtheRemoteEscapeCharacter ....................................................... 115

Index................................................................................................................. 116

Chapter 1 - Introduction

1.1 Introduction

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

modems available, the MT2834MR6, from Multi-Tech Systems. This owner’s manual will help you install,

configure, test, and use your modem.

Your MT2834MR6 is designed to operate as an enhanced ITU-T V.34 dial-up modem. As such, it includes

the advanced features of Multi-Tech standalone modems, such as the popular MultiModemZDXb.

This manual documents all of the MT2834MR6’s features and capabilities, such as autodial, autoanswer,

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 described, so you

will know where to turn for specific information.

1.2 Manual Organization

Chapter 1 Introduction and Description

This chapter describes the MT2834MR6 and its LED indicators, gives its technical specifications, and

provides a guide to the organization of the manual.

Chapter 2 Dialing and Answering

This chapter describes answer mode operation in detail, including handshaking procedures between two

modems and an autoanswer application. Various methods of call termination are also described.

Chapter 3 Command Mode Operation

This chapter provides an introduction to MT2834MR6 command mode fundamentals, followed by a detailed

explanation of each AT command, providing examples where applicable.

Chapter 4 S-Registers

This chapter describes the MT2834MR6’s S-registers, which are used to store various modem options. Each

S-register is defined and explained.

Chapter 5 Error Correction, Data Compression and Speed Conversion

This chapter provides detailed information about some of the advanced features of the MT2834MR6, namely,

V.42 error correction, data compression, speed conversion, and other features that improve throughput.

Chapter 6 Testing the MT2834MR6

This chapter describes loopback testing for the MT2834MR6.

Chapter 7- Warranty, Service, and Technical Support

This chapter provides the terms of the MT2834MR6’s warranty, instructions for obtaining factory service, and

information about Multi-Tech’s BBS and technical support. Information on upgrading the MT2834MR6’s

firmware is also provided.

Appendices

This chapter includes sections pertaining to ASCII/HEX/Decimal Conversion Chart, Dial Pulses and Tone

Dial Frequencies, Result Code Summary, S-Register Summary, AT Command Summary, RS-232 Interface

Specifications, Cable and Connector Diagrams, Escape Methods, and Remote Configuration.

Chapter 1 - Introduction

1.3 Description

Each MT2834MR6 card contains six integrated 33,600 bps MultiModems. Each modem on the MT2834MR6

card can be configured independently of the others via the MultiModemManager controller card (Model

MR4800 or MR4800E), which can support and control up to 16 MultiModem cards per rack. Refer to your

MultiModemManager

Owner’s Manual

for more information about the rack and its components.

Perhaps the most significant extras incorporated in the MT2834MR6 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 MT2834MR6 offers interactive automatic dialing capability, as well as command mode option

configuration. Two dial command strings, of up to 60 digits each, can be stored in each modem’s nonvolatile

memory. The modem supports both pulse and tone dialing, and can recognize dial tones and busy signals

for reliable call-progress detection.

The MT2834MR6 is registered by the FCC for direct connection to the public telephone networks. No Data

Access Arrangements (DAAs) are required.

The MT2834MR6 is fully compatible with the standard AT command set, and is therefore compatible with all

popular communications software packages.

Chapter 1 - Introduction

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 MT2834MR6 is

installed:

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

b. The FCC Registration Number: AU7USA-30805-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: RJ-11C or RJ-11W (single line)

e. The manufacturer’s name and model number: Multi-Tech Systems - Model MT2834MR6

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 your fax software manual for setup details.

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