Multi-Tech Systems MT2834ZPX owner manual Troubleshooting, Modem Does Not Respond to Commands

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Chapter 5 - Troubleshooting

Chapter 5 - Troubleshooting

Troubleshooting

Your MT2834ZPX was thoroughly tested at the factory before it was shipped. If you are unable to make a successful connection or if you experience data loss or garbled characters during your connection, it is possible that the modem is defective. However, it is more likely that the source of your problem lies elsewhere. Problems you may encounter include the following:

The modem does not respond to commands.

The modem dials but is unable to make a connection.

The modem disconnects while online.

The modem cannot connect when answering.

File transfer is slower than it should be.

Losing data.

Getting garbage characters on the monitor.

Can’t run fax and communications software at the same time.

If you experience problems, please check the following possibilities before calling Tech Support (see Chapter 7).

The Modem Does Not Respond to Commands

Make sure you are issuing the modem commands from the data communications software, either manually in terminal mode or automatically by configuring the software. (You cannot send commands to the modem from the DOS prompt.)

Make sure you are in terminal mode in your data communications program, then type AT and press ENTER. If you get an OK response, your connections are good and the problem likely is in your phonebook entry or session settings.

Try resetting your modem by turning it off and on. Make sure there is a reset command (&F) in your initialization string, or your modem may not initialize correctly.

If you don’t get an OK, the problem may still be in the communications software. Make sure you have done whatever is necessary in your software to make a port connection. Not all communications programs connect to the COM port automatically.

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Contents Page Record of Revisions Revision Description Contents Index Introduction and Description Modem Features Product Description Fax FeaturesInstallation and Connection How to Use This ManualSoftware Configuration AT Commands and S-RegistersService, Warranty & Technical Support/ BBS Testing Your ModemAppendices Safety Warnings Installation and ConfigurationConfiguration and Installation Procedure StepProcedure Configuration/Installation ProcedureInstallation and Configuration Is Your MT2834ZPX Ready for Use? Operating Your MT2834ZPX Simple Operations Configuring Software for Your Modem Software Configuration IntroductionAT &F X4 S0= 2 M PC Initialization StringsConfiguring Software for Your Computer Changing Default ParametersTerminal Emulation Configuring Software for the Remote SystemFile Transfer Protocols When to Disable Data CompressionAT &F S0=0 X4 &E14 M 16550 Uart and Windows Disabling Error CorrectionAT &F S0=0 X4 &E0 M COM2FIFO=1 COMnFIFO=1Page Modem AT Commands Command a Default $BA0 Description Command Values Default $EB0 Description =0 thru $Fn Command Values Default Command Values Default Description Default &P1 Description RFn Command T = 0, 1, 2, or Values Default Description Command @ Remote Configuration Procedures Remote ConfigurationRemote Configuration Operation Procedures StepProcedure Contd. Remote Configuration Operation Procedures Password CommandsEscape Code Character RegistersReturn Character Pause Time for Comma S13 Remote Configuration Escape Character S29 Local Inactivity Timer S36 Time Between DTR Inactive and Modem Off-Hook Q0 Multi-Tech Result Codes Result CodesQ1 Standard AT Result Codes AT Commands and S-Register Summary Modem Does Not Respond to Commands TroubleshootingPage Modem Dials But Cannot Make a Connection Page Modem Disconnects While Online File Transfer Is Slower Than It Should Be Modem Cannot Connect When AnsweringLosing Data Fax and Communications Software Won’t Run at the Same Time Getting Garbage Characters on the MonitorLocal Analog Loopback Test Testing Your Modem Local Analog Loopback Test/V.54 LoopDigital Loopback Test/V.54 Loop 2 Local/Manual Digital Loopback Test local/manual Digital Loopback Test/V.54 Loop 2 Remote/ AutomaticDigital Loopback Test remote/automatic Limited Warranty Service, Warranty and Tech Support IntroductionTech Support On-line Warranty RegistrationRecording Modem Information Service To log on to the Multi-Tech BBS About the Multi-Tech BBSTo Download a file If you know the file nameIf you don’t know the file name About CompuServe/Internet About the Multi-Tech Fax-Back ServiceAppendix a Technical Specifications Command Buffer Intelligent FeaturesModulation Fax ModulationsCarrier Frequencies BpsBell Standard Carrier FrequenciesDataCarrier Frequencies Diagnostics ConnectorsTemperature Power Consumption Dimensions697 770 852 941 1209 Digits 1336 1477 1633 Appendix B Tone Dial FrequenciesAppendix C FCC and Canadian Regulations RJ11C or RJ11W single line Appendix C FCC and Canadian Regulations Canadian Limitations Notice Index 15, 19 In-band Escape Sequence MultiExpress for Windows PBX/CBX Disconnect Drop Time for DSR/CTS/CD Rings Which Have Occurred Registers Serial port 17, 20, 21 17, 19