Multitech MT2834MR6 Betriebsanweisung

MultiModemMT2834MR6User Guide

10Chapter 1 - Introduction1.4 FCC Regulations for Telephone Line Interconnection1. No repairs are to be made by you. Repairs are to be made only by Mu

100Appendix&En n = 0–15 V.42 Error Correction Modes&E0 Non-error correction mode (V.42 disabled).*** &E1 Auto-reliable mode.&E2 Reliab

101Appendix#Fn n = 0, 1, or 2 Fallback Modes When Online#F0 No fallback when online.#F1 Fall back incrementally from maximum speed to 4800 bps.*** #F2

102Appendix$MBn n = speed Modem Baud Rate$MB75 Select ITU-T V.23 mode.$MB300 Select 300 bps on line.$MB1200 Select 1200 bps on line.$MB2400 Select 240

103Appendix&RFn n = 0 or 1 CTS/RTS Interaction Control&RF0 Let CTS follow RTS.*** &RF1 Let CTS act independently.&RN n/a Rate Renegoti

104Appendix&Tn n = 4 or 5 Respond to Remote Digital Loopback Signal&T4 Enable response to remote digital loopback signal.*** &T5 Disable r

105Appendix:At end of dial Continuous Redialcommand Colon; causes continuous redial of number until answered (10 in North Americanmodels). Not used i

106AppendixAppendix FRS-232C Interface SpecificationsThe MT2834MR6’s serial interface circuits have been designed to meet the electrical specification

107AppendixFunctional Description of the RS-232C SignalsTransmitted Data (TD) — Pin 2 (To modem)Signals on this circuit are generated by the local com

108AppendixTest Voltage (+V) — Pin 9 (From modem)This test pin has 330 ohms of resistance to +12 volts DC. It can be used to strap othersignals high.

109AppendixRing Indicator (RI) — Pin 22 (From modem)This signal remains on for the duration of the ringing signal. When a ring signal is receivedby th

11Chapter 1 - Introduction1.5 Canadian Limitations NoticeNotice: The ringer equivalence number (REN) assigned to each terminal device provides an indi

110AppendixAppendix GCable and Connector Diagrams RS-232C Serial Cable1 1 Frame Ground 12 2 Transmit Data 23 3 Receive Data 34 4 Request to Send 45

111AppendixAPPENDIX HIntroduction to MultiTech Escape MethodsYou may sometimes find it necessary to issue AT commands to your modem, while you are onl

112AppendixHow to Select an Escape MethodIf you want your modem to escape and then wait for you to issue a command before it will return to onlinemode

113AppendixS-Registers and Escape SequenceThere are two S-registers to modify the functioning of escape sequences. Register S32 establishes a valuefor

114AppendixAPPENDIX IIntroduction to Remote ConfigurationRemote configuration, a feature of Multi-Tech’s MT2834MR6 modems, is a network management too

115AppendixChanging the Passwords1. Establish a remote configuration link with the remote modem as described above.2. Type AT#IMULTI-TECH (or AT#Ixxxx

Index

117IndexIndexAAbort timer 19, 21, 28, 29, 59, 63Analog loopback test 82Answer command 21, 52Answer mode 27, 46, 52Answer Tone command 36Answerback com

118IndexA: 26AT 21, 22attention code 21, 22B36command string limit 22D 21, 26D...N... 30disabling command mode 21, 36E34editing 22functional summary 2

119IndexCTS signalcontrol of 41disconnect drop time 60flow control 49RTS interaction 42CTS/RTS interaction control 42DDAA 9Data bit 49Data compression

12Chapter 1 - Introduction1.6 Technical SpecificationsModel Number MT2834MR6Data Rates (Modem) Six independent modems (Modem A, B, C, D, E, F), each o

120IndexFlash On-Hook command 28Flow control 41, 49, 50, 51, 74commands 49CTS/RTS enable 49disabling 49hardware (RTS/CTS) 72no-error correction mode 7

121IndexPPacing 49, 50, 73enable/disable 51ENQ/ACK 50, 73Pacing command 51, 74Parameters 22, 32, 47default 22, 41Parity 49PBX phone systems 27, 60PBX/

122IndexS9 59S94 38, 62summary 96Safety 16Serial port baud rate 46Serial Port Baud Rate command 77Set Pulse Dial Ratios command 92Setup Password comma

S000326A

13Chapter 1 - IntroductionCarrier Frequencies: Transmit originate: 1270 Hz mark Bell 103/113 1070 Hz space (300 bps) Receive originate: 2225 Hz mar

14Chapter 1 - IntroductionFirmware Upgrades Via flash PROM technology on Multi-Tech’s BBSIndicators LEDs for Transmit Data, Receive Data, Carrier Dete

15Chapter 1 - Introduction1.8 Modem LED IndicatorsThe MT2834MR6 has five LED indicators per modem:TD Transmit Data. This LED blinks when data is being

16Chapter 1 - Introduction1.10 MT2834MR6 Installation NotesAll installation must be done by a qualified service person.The installation instructions i

Chapter 2 - Dialing and Answering

18Chapter 2 - Dialing and Answering2.1 IntroductionThis chapter describes the dialing and answering capabilities of the MT2834MR6 modems, which aresta

19Chapter 2 - Dialing and Answering2.4 Call TerminationThere are several methods by which you can terminate a call, or simply stated, hang up:1. Comma

MultiModem MT2834MR6 User GuidePN: S000326ACopyright ©2003 by Multi-Tech Systems, Inc.All rights reserved. This publication may not be reproduced, in

Chapter 3 - AT Commands

21Chapter 3 - AT Commands3.1 Working with AT CommandsThe MT2834MR6’s modems are controlled by instructions called AT commands, so called because theat

22Chapter 3 - AT Commands3.2.2 Command StructureYou can control a wide variety of modem operations and options when the modem is in command mode. ATco

23Chapter 3 - AT CommandsTable 3-1. AT Commands by FunctionTopic: Command: Description:Dialing Action D DialA: Continuous redialH On-hook/off-hookDia

24Chapter 3 - AT CommandsTable 3-1. AT Commands by Function (con't)Topic: Command: Description:V.34 Controls %F Echo canceler frequency offset c

25Chapter 3 - AT CommandsTable 3-1. AT Commands by Function (con't)Topic: Command: Description:&E10 Non-error correction mode flow control o

26Chapter 3 - AT Commands3.2 Dialing CommandsDialing commands are used to dial and to hang up.Ds Dials = phone numberDefault: noneThe letter D in a co

27Chapter 3 - AT Commands3.3 Dial Modifier CommandsThe dial string can include the digits 0 through 9, the pound sign (#), the asterisk (*), and the l

28Chapter 3 - AT Commands, Dialing PauseEnter a comma in the dialing string to make the modem pause while dialing. This pauselasts two seconds (North

29Chapter 3 - AT Commands$ Call Card Tone DetectUse the $ command to dial services that require you to enter your call card number after atone. A $ ch

ContentsChapter 1 - Introduction ... 71.1 Introduction ...

30Chapter 3 - AT Commands3.4 Phone Number Memory CommandsThe modem can store up to two telephone numbers in nonvolatile memory. You can store the numb

31Chapter 3 - AT CommandsL List Stored Telephone NumbersUse the L command to display dialing commands stored in the modem’s nonvolatilememory. Typing

32Chapter 3 - AT Commands3.5 Configuration Storage and Recall CommandsThe MT2834MR6 stores parameters in two places. It stores factory default paramet

33Chapter 3 - AT CommandsTable 3-2. Where the Modem Reads Configuration ParametersPower-OnPrevious Command AT&F and ATZAT&W1 (default) ROM RO

34Chapter 3 - AT Commands3.6 Modem Response (Result Code) CommandsThe MT2834MR6’s modems can give responses to commands. The most common one is OK, bu

35Chapter 1 - IntroductionVn Result Codes (Verbose/Terse)n = 0 or 1Default: V1The V command controls whether the modem’s result codes display as verba

36Chapter 3 - AT Commands3.7 Online Connection CommandsThe following commands control the conditions of the online connection.#An Auto Speed Detection

37Chapter 3 - AT Commands&CDn Cleardown at Disconnectn = 0 or 1Default: &CD0In the V.32, V.32bis, and V.34 protocols, a cleardown is sent by o

38Chapter 3 - AT Commands&Gn Guard Tonesn = 0, 1, or 2Default: &G0 (models outside U.K.)&G2 (U.K. models only)The &G command is used t

39Chapter 3 - AT Commands$Tn Calling Tonen = 0 or 1Default: $T1The $T command enables or disables the modem’s calling tone, which is required by someE

3.13 Escape Sequences ... 523.14 Remote Configuration Commands...

40Chapter 3 - AT Commands3.8 V.34 CommandsThe following commands apply only in V.34 mode.%Fn Echo Canceler Frequency Offset Compensationn = 0 or 1Defa

41Chapter 3 - AT Commands3.9 RS-232 Interface CommandsThese commands define how am MT2834MR6 modem will use and respond to standard RS-232 signals.&am

42Chapter 3 - AT Commands&Sn Data Set Ready Controln = 0, 1, or 2Default: &S1Use the &S command to control the state of the Data Set Ready

43Chapter 3 - AT Commands3.10 Error Correction and Data Compression CommandsYou can configure a modem to any of three different V.42 modes of operatio

44Chapter 3 - AT Commands$En V.42 Error Correction at 300 bpsn = 0 or 1Default: $E0At 300 bps, error correction is not normally used.$E0 disables 300

45Chapter 3 - AT Commands3.11 Speed Conversion CommandsSpeed conversion allows the MT2834MR6 to communicate at a fixed speed through the serial port w

46Chapter 3 - AT Commands$SBn Serial Port Baud Raten = speedDefault: $SB57600The $SB command sets the speed of the MT2834MR6’s serial port in both ori

47Chapter 3 - AT Commands3.12 Immediate Action CommandsUse these commands to get information about AT commands and the current settings of the modem.

48Chapter 3 - AT Commands&RN Rate RenegotiationDefault: noneThe &RN command forces the modem to perform a rate renegotiation while online. To

49Chapter 3 - AT Commands3.12 Flow Control CommandsFlow control refers to the techniques used by data terminal equipment and the modem to pause and re

5.10.6 Pacing (Computer-Initiated Flow Control) ... 745.10.7 Data Compression ...

50Chapter 3 - AT Commands&E5 XON/XOFF Flow ControlXON/XOFF flow control is an in-band method of data flow regulation used by the modem orcomputer

51Chapter 3 - AT Commands&En Pacing (Computer-Initiated Flow Control)n = 12 or 13Default: &E13Pacing is the means by which the DTE (data termi

52Chapter 3 - AT Commands3.13 Escape SequencesEscape sequences (escape codes) cause the modem to enter command mode from online mode withoutdisconnect

53Chapter 3 - AT Commands3.14 Remote Configuration CommandsWhen you are online with another Multi-Tech modem, you can issue AT commands to it by sendi

54Chapter 3 - AT Commands3.15 Line Probe CommandsBefore V.34 negotiation, the local and remote modems use modulated calling and answering tones toexch

55Chapter 3 - AT Commands3.16 Diagnostic CommandsThe MT2834MR6 has two diagnostic commands and four diagnostic modes. The power-on self-test isactivat

Chapter 4 - S-Registers

57Chapter 4 - S-Registers4.1 IntroductionThis chapter describes the MT2834MR6’s S-registers, which are small regions of memory where modemconfiguratio

58Chapter 4 - S-RegistersS3 Return CharacterUnit: DecimalRange: 0–127Default: 13 (^M)S3 defines the carriage return character by its decimal ASCII cod

59Chapter 4 - S-RegistersS7 Time for Carrier (Abort Timer)Unit: 1 secondRange: 1–255 (U.S.A.)1–45 (Canada and International)1–55 (U.K.)Default: 45 (No

Appendix B ... 92Dial Pulses ...

60Chapter 4 - S-RegistersS11 Tone Dialing Spacing and DurationUnit: 1 msRange: 1–255 (U.S.A.)80–255 (Canada, U.K., International)Default: 70 (U.S.A.)8

61Chapter 4 - S-RegistersS30 Inactivity TimerUnit: 1 minuteRange: 0, 1–255 minutesDefault: 0 (disabled)S30 can be used to cause the modem to disconnec

62Chapter 4 - S-RegistersS43 Force V.34 Connect SpeedUnit: N/ARange: 0, 33, 31, 28, 26, 24, 21, 19, 16, 14, 12, 96, or 48Default: 0 (disabled)S43 forc

63Chapter 4 - S-Registers4.3 Reading and Assigning S-Register ValuesUse the S command to assign a value to an S-register and to read an S-register’s c

64Chapter 4 - S-Registers4.4 AT Commands Affecting S-RegistersFor maximum throughput, the MT2834MR6's default configuration is for originating a

Chapter 5 - Error Correction,Data Compression & Speed Conversion

66Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.1 IntroductionThe MT2834MR6 has intelligent features beyond those of the AT co

67Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.2 How V.42 Detects and Corrects ErrorsSome of the better known software-based

68Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.3 Data CompressionThe MT2834MR6 has both V.42bis and MNP class 5 data compress

69Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.5 V.42 Mode Select Command (#L)The V.42 Mode Select command (#L) selects which

Chapter 1 - Introduction

70Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.6 Modes of OperationYou can configure your MT2834MR6 in one of three different

71Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.7 Flow ControlFlow control refers to the techniques used by computer devices t

72Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.8 Modem-Initiated Flow ControlWhen operating in V.42 reliable mode, the MT2834

73Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.9 Pacing (&E13)As mentioned earlier, the MT2834MR6 can initiate flow contr

74Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.10 Compression, Error Correction, Flow Control,and Pacing CommandsThe MT2834MR

75Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.11 Result CodesWhen the MT2834MR6 connects with another modem with error-corre

76Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.12.1 Baud Adjust ($BA)In typical operations, the MT2834MR6 will do one of two

77Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.12.3 Serial Port Baud Rate ($SB)The $SB command presets the speed of the MT283

78Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.13 Related Commands5.13.1 Autoreliable Buffering ($A)In autoreliable mode, the

79Chapter 5 - Error Correction, Data Compression, and Speed Conversion5.13.4 Retransmit Count ($R)If errors are received during a reliable connection,

8Chapter 1 - Introduction1.1 IntroductionWelcome to the world of data communications. You have acquired one of the finest rack-mount intelligentmodems

Chapter 6 - Testing & Troubleshooting

81Chapter 6 - Testing and Troubleshooting6.1 IntroductionEach time you power up the MT2834MR6, it performs an automatic self-test to ensure proper ope

82Chapter 6 - Testing and Troubleshooting6.2 Local Analog Loopback Test (V.54 Loop 3)In this test, data from your computer or terminal is sent to your

83Chapter 6 - Testing and Troubleshooting6.3 Remote Digital Loopback Test (V.54 Loop 2)In this test, your modem must be online with another modem, suc

84Chapter 6 - Testing and Troubleshooting6.4 Local Digital Loopback Test (V.54 Loop 2)This test is identical to the remote digital loopback test with

Chapter 7 - Warranty & Service

86Chapter 7 - Warranty And Service7.1 Multi-Tech Systems, Inc. Warranty & Repairs Policies7.1.1 WarrantyMulti-Tech Systems, Inc., (hereafter “MTS”

87Chapter 7 - Warranty And Service7.1.3 International Customers (outside U.S.A. and Canada)Your original point of purchase reseller may offer the quic

88Chapter 7 - Warranty And Service7.2 Repairs7.2.1 Repair Procedures for U.S. and Canadian CustomersIn the event that service is required, products ma

89Chapter 7 - Warranty And Service7.2.3 Repair Procedures for International DistributorsProcedures for International Distributors of Multi-Tech produc

9Chapter 1 - Introduction1.3 DescriptionEach MT2834MR6 card contains six integrated 33,600 bps MultiModems. Each modem on the MT2834MR6card can be con

Appendices

91AppendixAppendix AASCII Conversion ChartCTRL CODE HEX DEC CODE HEX DEC CODE HEX DEC CODE HEX DEC@ NUL 00 0 SP 20 32 @ 40 64 ` 60 96A SOH 01 1 ! 21 3

92AppendixAppendix BDial PulsesWhen you pulse dial, as when you make a call with a rotary dial telephone, your telephone or modemgenerates codes in th

93AppendixTone Dial FrequenciesThe tone dialing method combines two frequencies for each of the twelve digits found on a touch-tone dialpad. This meth

94AppendixAppendix CResult Code SummaryMulti-Tech Result Codes (&Q0)Terse Verbose Definition0OKCommand was executed without error; ready for next

95AppendixLAP-M Reliable Mode. If the modem connects using LAP-M error correction, the word LAPM or letter L is added to theCONNECT responses as follo

96AppendixAppendix DS-Register SummaryRegister Unit Range Default DescriptionS01 ring 0, 1–255 1 Sets the number of rings until the modem answers.ATS0

97AppendixS341 char- 0–60 10 Sets the number of command characters allowed after +++AT. acterS361 sec 0, 1-255 5 Sets the time between DTR inactive

98AppendixAppendix EAT Command SummaryCommand Values DescriptionATn/a Attention CodeThe attention code precedes all command lines except A/, A: and es

99Appendix&CDn n = 0 or 1 Cleardown at Disconnect*** &CD0 Enable cleardown.&CD1 Disable cleardown.Ds s = phone # DialDial telephone number