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MultiModemBA User Guide

Switch #10

Leased Line/Dial-Up Operation -- "DDD"

(Asynchronous/Synchronous Mode/Leased Line/Dial-Up)

The modem operates in either leased-line or dial-up modes. This switch controls leased-line/dial-up operation. Place DIP-Switch #10 in the UP position for Dial-Up operation. Place DIP-Switch #10 in the DOWN position for Leased-Line operation

Dial-Up Operation	=	Switch #10 UP
Leased Line Operation	=	Switch #10 DOWN
Factory Default Setting	=	UP

Switch #11

"AT" Responses/Multi-Tech Responses (Asynchronous Mode/Leased line/Dial-Up)

In Asynchronous mode, you can set the modem to respond with Result Codes according to the "Multi-Tech" command response set (Switch #11 in the DOWN position), or to "AT" command response set (Switch #11 in the UP position). The &Q command performs the same function (choosing AT or Multi-Tech Result Codes), and is explained further in Section 5.3 of this manual.

"AT" Responses (&Q1)	=	Switch #11 UP
"Multi-Tech" Responses (&Q0	=	Switch #11 DOWN
Factory Default Setting	=	DOWN

Switch #11

Internal/External Clocking

(Synchronous Mode/Leased Line/Dial-Up)

In Synchronous mode, the transmit clock can be supplied by the DTE on pin 24 of the RS-232C/V.24 interface by placing DIP-Switch #11 UP. Place DIP-Switch #11 in the DOWN position to enable DCE to control clocking (internal clock via pins 15 and 17 of the RS-232/V.24 interface).

External Clock (pin 24)	=	Switch #11 UP
Internal Clock (pins 15/17)	=	Switch #11 DOWN
Factory Default Setting	=	DOWN

Switch #12

Asynchronous/Synchronous Operation -- "Sync"

(Asynchronous/Synchronous Mode/Leased Line/Dial-Up)

The modem can operate in either Asynchronous mode or Synchronous mode. In Synchronous mode, start and stop bits are eliminated. The modem's internal clock circuits on the RS-232C/V.24 pins 15 and 17 are activated. The modem's Command mode is not accessible in Synchronous mode. This switch is a means to alternate and to access either mode. In Synchronous mode, you may want to set the RTS forcing and CTS forcing DIP-Switches so that both of signals act normally (not forced on).

Synchronous Operation	=	Switch #12 UP
Asynchronous Operation	=	Switch #12 DOWN
Factory Default Setting	=	DOWN

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Contents

User Guide User Guide Record of Revisions Contents Index 106 Introduction and Description How To Use This Manual Introduction DIP-Switches Modem FeaturesCallback and Remote Configuration Warranty, Service & Technical Support 1 2834 Series Features Fax Features Technical Specifications Power Modem LED Indicators MT2834 LED Display Controls on PC Board Installation and Connection What is in Your Modem Package? Installation Installation and Connection Safety WarningsInstallation Procedure Step Procedure Installing Data Communications Software MultiModemBA/BAI Connections Software Configuration and Modem Basics PC Initialization Strings Configuring Your SoftwareConfiguring Software for Your Modem AT &F X4 S0=0 M Configuring Software for the Remote System Changing Default ParametersConfiguring Software for Your Computer Other Parameters Terminal Emulation File Transfer Protocols Command Mode AT Command Editing Functional Modes Summary of AT Commands Command Mode Store Modem Configure Data Multi-Tech Result Codes Result CodesStandard AT Result Codes Continuous Redial not used in BAI a or Dialing Commands Dialing Action CommandsDial Command D Dialing a Stored Number N Voice/Data Dialing $VD Dial Modifier CommandsDTR Dialing $D Pulse or Tone Dial P T Set Pulse Dial Ratios &P Return to Command Mode After Dial Command ExecutionReverse the Mode of Operation R Automatic Pauses in Dialing Calling Card Detect Tones $ Phone Number Memory CommandsFlash On Hook Quiet Answer @ Number Linking NN Configuration and Default Storage CommandsListing Numbers Stored in Memory L Async/Sync Mode Switching &M Loading Factory Defaults &FModem Reset Z Unix Uucp Spoofing $SP Result Codes Enable/Disable and No Response Answer Q Command Response Result Code CommandsEcho Command Mode Characters E Result Codes Multi-Tech or Standard AT &Q Result Codes Basic and Extended and Call Progress Selection Phone Line Conditioning CommandsGuard Tones Not Used in BAI Models &G Bell/V.21 Tone Enable/Disable Trelis Coded Modulation #TFallback Modes When On-Line #F Phone Line Monitoring Speaker M Cleardown at Disconnect &CD 7 RS-232C Interface Control CommandsEnable/Disable Lowspeed Fast Connect $FC Auto Speed Detect #A Data Set Ready Control &S Data Terminal Ready Control &DCTS Control &R CTS/RTS Interaction Control &RF Error Correction Commands Enable/Disable Auto Reliable Fallback Character $F Auto-Reliable Buffering $A Error Correction/300bps $E Flow Control CommandsRetransmit Count $R Xon/Xoff Flow Control &E5 Hardware Flow Control &E4Xon/Xoff Pass-Through &E7 Hewlett-Packard ENQ/ACK Pacing &E9 Normal Mode Modem Flow Control On &E11Send Xon/Xoff Characters #X Terminal/Computer Initiated Pacing &E13 Enq/Ack Pacing Commands Normal/Auto-Reliable/Reliable Mode CommandsXon/Xoff Pass-Through Commands Parity Selection #P Speed Conversion $BA Speed Conversion CommandsModem Baud Rate $MB Serial Port Baud Rate $SB Immediate Action Commands Force Answer Mode a Off Hook H Enable/Disable Reading of Line Probe Information Commands Line Probe CommandsExiting Command Mode, Going Back On-Line O Format of Line Probe Graph or Table Commands Registers Escape Code Character Number of Rings Until Modem AnswersRings Which Have Occurred Return Character Backspace Character Time for Carrier Abort TimerLine Feed Character Wait Time for Dial Tone Carrier Detect Response Time S10 Carrier Loss Disconnect Delay TimeS13 Remote Configuration Escape Character S11 Tone Dialing Tone Spacing and Duration S17 Changing Break Time S15 Callback Time DelayS16 Callback Attempts S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CD S30 Inactivity Timer S26 Failed Password AttemptsS29 Local Inactivity Timer S32 Time Elapse for Escape Sequence S37 Time Between DTR Active and Modem On-Hook Reading and Assigning S-Register ValuesS36 Time Between DTR Inactive and Modem Off-Hook S48 Program V.34bis Connect Speeds 2834 Series only Examples of Assigning Values AT Command and S-Register SummaryExamples of Reading Values Callback Security and Remote Configuration Callback Feature Description Remote Configuration Description To turn your modems Callback Security feature on and off To change your Remote Configuration feature statusTo set parity of the password/message prompt AT#DB2CR or AT#DB1CR Callback Operational Sequence Procedures Remote Configuration ProceduresCallback Security and Remote Configuration Remote Configuration Operation Procedures StepProcedure Change Login Password Remote Configuration and Callback Security AT CommandsCallback Security Enable/Disable AT#I=yyyyyyyyyyCR Remote Configuration/Callback Security S-Registers Local Inactivity Timer S29 DIP-Switch Settings DIP-Switch Option Settings PC Board Switch #4 AS/400 Mode Synchronous Mode/Leased Line/Dial-UP DIP-Switch Settings MultiModemBA User Guide = Down Down Speaker Volume Control Switch #16 Reserved for Future Use Recording Option Configurations Switch Function Position Effect DIP Switches #13-14 DIP Switches #15-16 Warranty, Service and Tech Support Multi-Tech Systems, Inc. Warranty & Repairs Policies Warranty, Service, and Technical Support Online Warranty Registration Repair Procedures for International Distributors Internet Sites Replacement PartsTechnical Support Country Telephone Appendixes Upgrade Overview Appendix a Upgrading Your Modem’s Firmware Download the Upgrade File Upgrade the Modem’s Firmware None of the LEDs Light When the Modem Is On Appendix B TroubleshootingModem Does Not Respond to Commands Appendix B Troubleshooting Modem Dials But Cannot Make a Connection File Transfer Is Slower Than It Should Be Modem Cannot Connect When AnsweringModem Disconnects While On-line Am Losing Data Am Getting Garbage Characters on the Monitor Appendix C AT Command Summary Apendix C AT Command SummaryCommand Values Description MultiModemBA User Guide Command Values Description SN d $Fn RF n $SBn Break Atcr Callback Security/Remote Configuration Command Summary Command Description #Ixxxxxxxxxx Password Command Summary#Syyyyyyyyyy 25bis Commands Appendix D V.25bis Operation Delayed and Forbidden Numbers25bis Operation 25bis Set-Up and Initialization 25bis Mode AT Commands25bis DIP-Switches Appendix D V.25bis Operation Change Serial Baud Rate CSP Command 25bis AT CommandsEnable/Disable V.25bis Mode $V Command 25bis Responses Result Codes Listing Forbidden Phone Number RLF Command Dial Phone Number Provided CRN CommandListing Delayed Phone Numbers RLD Command Disregard or Connect to Incoming Calls DIC or CIC Command Italy DTR Dialing $D CommandITU V.25bis Country Specific Information Switzerland Belgium Appendix E MultiModemBA Cables AustriaFrance Singapore Appendix E MultiModemBA Cables Figure E-1. RS232 Cable IBM PC Appendix F Regulatory Information Appendix F Regulatory Information FCC PartFCC Part 68 Telecom Industry Canada Canadian Limitations Notice 104 International Modem Restrictions EMC, Safety, and R&TTE Directive Compliance105 Index 106 Index 107 PBX/CBX Disconnect Drop Time for DSR/CTS/CD53 108 109