Multi-Tech Systems MT5634ZPX-PCI owner manual Common Problems, Troubleshooting

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4 Troubleshooting

Common Problems

You may encounter the following problems:

•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 appears slower than it should be.

•Data is being lost.

•There are garbage characters on the monitor.

•Fax and communications software won’t run at the same time.

If you experience problems, please check the following possibilities before calling Technical Support (see Chapter 5).

The modem does not respond to commands

•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. The problem likely is in the connection description in your communications software.

•Reset your modem by sending it an ATZ or AT&F command in terminal mode. If using legacy software (software designed for an older operating system), make sure the initialization string includes &F as the first command to cancel any leftover commands that could interfere with the modem’s operation.

•If you don’t get an OK, the problem may still be in the communications software. Make sure you have done whatever necessary in your software to make a port connection. Most legacy (prior to Windows 95) communications programs connect to the COM port when the software loads and remain connected until the program terminates. Some can disconnect without exiting the program. If this is the case, try issuing the software’s connection command. Also, if more than one communications program is open, they can conflict with each other. Make sure all other communications programs are closed and then try again.

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Contents Model MT5634ZPX-PCI Record of Revisions MT5634ZPX -PCIContents Introduction Limited Warranty Introduction Initial Checklist Common ProblemsData is being lost Technical SupportIntroduction and Description MT5634ZPX-PCI Introduction and Description FeaturesFax Peripiheral Component Interconnect PCIDownstream Rates Support/FunctionsUpstream Data Rates Optional V.8bis SequenceDigital Loss and Robbed-bit Signaling Auto Adapt What is in Your Modem Package?Appendix How to Use This ManualYou type this Typographic ConventionsInstallation What You’ll Need IntroductionInstallation Safety WarningsInstallation Overview Windows 95 Plug and Play Configuring the MultiModem ZPX-PCIInstalling the MultiModemZPX-PCI With the modem, insert the microphone External ConnectionsPlug the telephone’s line cable into Verifying Configuration Installing DriversPort COM Interrupt Address Speed To Remove Previous Modem from Windows Select Start, Settings, and then Control PanelIs Your MultiModemZPX-PCI Ready for Use? Simple Operation Operating Your MultiModemZPX-PCISelect Start, Programs, Accessories, and then HyperTerminal Software ConfigurationTesting Data Functions Connect dialog box, click Dialing Properties MultiModemZPX-PCI’s fax capabilities Testing FAX FunctionsClick Start, Programs, Accessories, and then WordPad Click Start, Programs, Accessories, and then HyperTerminal Testing Voice FunctionAT+FCLASS=8 AT+VLS=7 MultiModemZPX-PCI’s Speakerphone TestConfiguring Communications Software Installation Basic Procedure Remote ConfigurationChanging the Setup Password SetupPKUNZIP.EXE AT Commands, S-Registers, and Result Codes AT Commands Communication Standard Setting AT Commands, Result Codes, and S-RegistersCarrier Control DialDS=n Dial Stored Telephone Number Echo Command Mode CharactersEcho Online Data Characters Hook ControlMonitor Speaker Mode Monitor Speaker VolumeReturn Online to Data Mode Modulation HandshakeSr? Read Register Value Sr=n Set Register ValueResult Code Format Result Code SelectionLong Space Disconnect Modem ResetAuto Retrain Data Carrier Detect DCD ControlCommunications Mode Fn Load Factory Default SettingsAsynchronous Communications Mode 22bis Guard Tone ControlView Current Configuration Self-Test CommandsStore Current Configuration Select Stored Configuration for Hard Reset\Gn Modem Port Flow Control \Nn Error Correction Mode Selection\Jn Data Buffer Control \Kn Set Break Control\V n Protocol Result Code \T n Inactivity Timer\X n XON/XOFF Pass-Through Data Calling ToneSpeaker Codec Loopback Enable Synchronous Buffered ModeAllowed value Registers 50-150 Decimal Disables, 1-255 enables ModulationTones Minute 255=V.90/56Kflex disabled Connect. Where K56flex providedData mode = disable 1 = enableSets one of three 56K operating S36=5,7 LAPM, MNP, or Async MNP or Async1-4 sets the value to Result Codes Connected at 48000 bps Connected at 46000 bpsConnected at 50000 bps Connected at 52000 bpsTroubleshooting Initial Checklist Troubleshooting Common ProblemsMT5634ZPX-PCI Modem dials but cannot make a connection Modem disconnects while online Modem cannot connect when answering Data is being lost Warranty, Service, and Tech Support/BBS Limited Warranty Warranty, Service, and Tech Support Online Warranty RegistrationRecording Modem Information Technical SupportMulti-Tech Systems, Inc Woodale Drive Mounds View, MN ServiceTo log on to the Multi-Tech BBS Multi-Tech BBSTo Download a file If you know the file nameIf you don’t know the file name About the Internet About the Multi-Tech Fax-Back ServiceAbout CompuServe Appendix FCC Regulations for Telephone Line Interconnection Appendix a Regulatory ComplianceMulti-Tech Systems, Inc Fax Branding StatementAppendix Canadian Limitations Notice Appendix +12 VDC, -12 VDC, +5 VDC Product Safety ComplianceFigure A-1. Creepage and Clearance Distances European Low Voltage Directive EMC, Safety and Terminal Directive ComplianceNew Zealand Modem Warning Notice 14,400, 12,000, 9600, 7200, 4800, 2400, Appendix B Technical Specifications90/K56flex, ITU V.34 extended, V.34, ITU ITU Group 3, T.4, T.30, V.21, V.27terAppendix Hz mark, 1850 Hz space for Transmit Fax Carrier FrequenciesConnectors Code HEX DEC Appendix C Ascii Conversion ChartIntroduction Appendix D FLASHWINFlash UpgradeMT5634ZPX-PCI Index BBS Index Enable/disable V25 data calling tone S35Auto Retrain DataFall-forward , 7 fallback , 7, 37 fax Fax-back service , 66 FCC Regulations , 68-81 firmwareTones dialing MT5634ZPX-PCI