Multi-Tech Systems BA-Series manual Am Getting Garbage Characters on the Monitor

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MultiModemBA User Guide

I Am Getting Garbage Characters on the Monitor

Your computer and the remote computer may 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 communications software.

You may be experiencing line noise. Enable error correction, if it is disabled, or hang up and call again; you may get a better connection.

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 L8 (List Online Diagnostics) command in on-line mode, making a screen print of the diagnostics listing, and checking for parameters that may be unacceptable (number of retrains, round trip delay, etc.).

My Fax and Communications Software Won’t Run at the Same Time

Communications 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 communications device management application, such as Multi-Tech’s Virtual Modem Driver. In Windows 95, 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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Contents User Guide User Guide Record of RevisionsContents Index 106 Introduction and Description How To Use This Manual IntroductionDIP-Switches Modem FeaturesCallback and Remote Configuration Warranty, Service & Technical Support1 2834 Series Features Fax FeaturesTechnical Specifications Power Modem LED Indicators MT2834 LED DisplayControls on PC Board Installation and Connection What is in Your Modem Package? InstallationInstallation and Connection Safety WarningsInstallation Procedure Step ProcedureInstalling Data Communications Software MultiModemBA/BAI ConnectionsSoftware Configuration and Modem Basics PC Initialization Strings Configuring Your SoftwareConfiguring Software for Your Modem AT &F X4 S0=0 MConfiguring Software for the Remote System Changing Default ParametersConfiguring Software for Your Computer Other ParametersTerminal Emulation File Transfer ProtocolsCommand Mode AT Command Editing Functional ModesSummary of AT Commands Command ModeStore Modem Configure Data Standard AT Result Codes Result CodesMulti-Tech Result Codes Continuous Redial not used in BAI a or Dialing Commands Dialing Action CommandsDial Command D Dialing a Stored Number NVoice/Data Dialing $VD Dial Modifier CommandsDTR Dialing $D Pulse or Tone Dial P TSet Pulse Dial Ratios &P Return to Command Mode After Dial Command ExecutionReverse the Mode of Operation R Automatic Pauses in DialingCalling Card Detect Tones $ Phone Number Memory CommandsFlash On Hook Quiet Answer @Listing Numbers Stored in Memory L Configuration and Default Storage CommandsNumber Linking NN Async/Sync Mode Switching &M Loading Factory Defaults &FModem Reset Z Unix Uucp Spoofing $SPResult Codes Enable/Disable and No Response Answer Q Command Response Result Code CommandsEcho Command Mode Characters E Result Codes Multi-Tech or Standard AT &QGuard Tones Not Used in BAI Models &G Phone Line Conditioning CommandsResult Codes Basic and Extended and Call Progress Selection Bell/V.21 Tone Enable/Disable Trelis Coded Modulation #TFallback Modes When On-Line #F Phone Line Monitoring Speaker MCleardown at Disconnect &CD 7 RS-232C Interface Control CommandsEnable/Disable Lowspeed Fast Connect $FC Auto Speed Detect #AData Set Ready Control &S Data Terminal Ready Control &DCTS Control &R CTS/RTS Interaction Control &RFError Correction Commands Enable/Disable Auto Reliable Fallback Character $F Auto-Reliable Buffering $ARetransmit Count $R Flow Control CommandsError Correction/300bps $E Xon/Xoff Pass-Through &E7 Hardware Flow Control &E4Xon/Xoff Flow Control &E5 Hewlett-Packard ENQ/ACK Pacing &E9 Normal Mode Modem Flow Control On &E11Send Xon/Xoff Characters #X Terminal/Computer Initiated Pacing &E13Enq/Ack Pacing Commands Normal/Auto-Reliable/Reliable Mode CommandsXon/Xoff Pass-Through Commands Parity Selection #PModem Baud Rate $MB Speed Conversion CommandsSpeed Conversion $BA Serial Port Baud Rate $SB Immediate Action Commands Force Answer Mode a Off Hook HEnable/Disable Reading of Line Probe Information Commands Line Probe CommandsExiting Command Mode, Going Back On-Line O Format of Line Probe Graph or Table CommandsRegisters Escape Code Character Number of Rings Until Modem AnswersRings Which Have Occurred Return CharacterBackspace Character Time for Carrier Abort TimerLine Feed Character Wait Time for Dial ToneCarrier Detect Response Time S10 Carrier Loss Disconnect Delay TimeS13 Remote Configuration Escape Character S11 Tone Dialing Tone Spacing and DurationS17 Changing Break Time S15 Callback Time DelayS16 Callback Attempts S24 PBX/CBX Disconnect Drop Time for DSR/CTS/CDS30 Inactivity Timer S26 Failed Password AttemptsS29 Local Inactivity Timer S32 Time Elapse for Escape SequenceS37 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 onlyExamples of Reading Values AT Command and S-Register SummaryExamples of Assigning Values Callback Security and Remote Configuration Callback Feature Description Remote Configuration DescriptionTo set parity of the password/message prompt To change your Remote Configuration feature statusTo turn your modems Callback Security feature on and off AT#DB2CR or AT#DB1CR Callback Operational Sequence Procedures Remote Configuration ProceduresCallback Security and Remote Configuration Remote Configuration Operation Procedures StepProcedureChange Login Password Remote Configuration and Callback Security AT CommandsCallback Security Enable/Disable AT#I=yyyyyyyyyyCRRemote Configuration/Callback Security S-Registers Local Inactivity Timer S29 DIP-Switch Settings DIP-Switch Option Settings PC BoardSwitch #4 AS/400 Mode Synchronous Mode/Leased Line/Dial-UP DIP-Switch SettingsMultiModemBA User Guide = Down Down Speaker Volume Control Switch #16 Reserved for Future UseRecording Option Configurations Switch Function Position EffectDIP Switches #13-14 DIP Switches #15-16Warranty, Service and Tech Support Multi-Tech Systems, Inc. Warranty & Repairs Policies Warranty, Service, and Technical SupportOnline Warranty Registration Repair Procedures for International DistributorsInternet Sites Replacement PartsTechnical Support Country TelephoneAppendixes Upgrade Overview Appendix a Upgrading Your Modem’s FirmwareDownload the Upgrade File Upgrade the Modem’s Firmware Modem Does Not Respond to Commands Appendix B TroubleshootingNone of the LEDs Light When the Modem Is On 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 DataAm Getting Garbage Characters on the Monitor Command Values Description Apendix C AT Command SummaryAppendix C AT Command Summary MultiModemBA User Guide Command Values Description SN d$Fn RF n $SBn Break Atcr Callback Security/Remote Configuration Command Summary #Syyyyyyyyyy Password Command SummaryCommand Description #Ixxxxxxxxxx 25bis Commands 25bis Operation Delayed and Forbidden NumbersAppendix D V.25bis Operation 25bis Set-Up and Initialization 25bis Mode AT Commands25bis DIP-Switches Appendix D V.25bis OperationChange Serial Baud Rate CSP Command 25bis AT CommandsEnable/Disable V.25bis Mode $V Command 25bis Responses Result CodesListing 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 CommandItaly DTR Dialing $D CommandITU V.25bis Country Specific Information SwitzerlandBelgium Appendix E MultiModemBA Cables AustriaFrance SingaporeAppendix E MultiModemBA Cables Figure E-1. RS232 Cable IBM PCAppendix F Regulatory Information Appendix F Regulatory Information FCC PartFCC Part 68 Telecom Industry CanadaCanadian Limitations Notice 104105 EMC, Safety, and R&TTE Directive ComplianceInternational Modem Restrictions Index 106Index 107PBX/CBX Disconnect Drop Time for DSR/CTS/CD53 108109