Multi-Tech Systems MT5634ZBA-DID manual Did Troubleshooting

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MultiModemDID User Guide	Chapter 6 - Troubleshooting

DID Troubleshooting

•Make sure that the MT5634ZBA-DID parameters match the DID line. Refer to the *D command. Also, verify that your fax software is configured to match the analog DID trunk line and the MT5634ZBA-DID parameters.

•If callers are receiving an immediate busy signal or are allowed a short connection but become unexplectedly disconnected after a short time, try reversing the TIP and RING wires. The central office is sensitive to the DC polarity and this will reverse the polarity.

•If the MT5634ZBA-DID line is out of service, verify that the DC voltage is being applied by the MT5634ZBA-DID to the DID line. This voltage should be applied to the line at all times, even when the PC is not in use. The central office will check the line occasionally and if a voltage is not sensed, the line may be put out of service. If this has occurred, call the phone company to get the line back in service. Be sure to have you DID line information available.

•Note that the DID and POTS ports on the MT5634ZBA-DID cannot operate simultaneously. You can use only one port at a time since they share common circuitry within the modem.

•If the MT5634ZBA-DID is totally inoperational, verify that the power supply shipped with modem is connected properly to the modem and the wall outlet.

Important: Use the power source shipped with your modem. If you use any other power source, you could damage the MT5634ZBA-DID and void the warranty.

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Contents User Guide Trademarks Record of RevisionsRevision Date Description PatentsTable of Contents MultiModemDID User Guide Contents Introduction and Description FeaturesIntroduction We Supply SafetyYou Supply Assemble the Modem InstallationConnect the Modem to Your System Connect the Modem to the AC Power Outlet Removing Your Old Modem from WindowsFrom Windows 2000, XP Operation Front Panel of the MultiModemDID ModemDid Operation OperationConnecting to the Internet Dial-Up NetworkingAT Commands, S -Registers Result Codes Communication Standard Setting AT CommandsRepeat Last Command AnswerDS=n Dial Stored Telephone Number Echo Command Mode CharactersNumber ATDT1028806127853500$123456789 Echo Online Data CharactersResult Codes Enable/Disable Monitor Speaker ModeReturn Online to Data Mode Modulation HandshakeResult Code Format Modem ResetTone Dialing Result Code OptionsData Terminal Ready DTR Control Load Factory SettingsAsynchronous Communications Mode XON/XOFF Pacing ControlStore Current Configuration Test CommandsDisplay Current Settings Store Dialing Command\Bn Transmit Break Online command mode. The modem receives a \Bn\Kn Break Control \Qn Flow Control Selection \Nn Error Correction Mode Selection\Tn Inactivity Timer \Vn Protocol Result CodeDirect Connect Enable Adaptive Answer Result Code EnableDC n AT Command Control View Numbers in BlacklistCommand +DCS=x,y Select V.44 Data Compression Cisco ConfigurationCommand Speed Response $Dn DTR DialingCommand +DS44=n V.44 Data Compression Data Compression ReportingEnable Synchronous Buffered Mode Modulation Selection SubparametersMod value Valid max-rate values bps Modem on Hold Enable CommandsCommand +PCW=n Call Waiting Enable PCM Upstream IgnoreCommand +PMHR=n Modem on Hold Initiate Command +PMHT=n Modem on Hold TimerCommand +VDR= x, y Distinctive Ring Report Other CommandsCommand +VCID=n Caller ID Selection Quick Connect ControlCommand +++ATCR Escape Sequence Command %%%ATCR Remote Configuration Escape SequenceMT5634ZBA-DID Initialization Recommendations Number of did Digits Expected Busy-Out Timer at End of CallWait for Digit Time-Out Time Digit FormatDF1 Format for Reporting Incoming did NumberDF0 DF2Page Register Unit Range Default Description RegistersValue Speed Value RateS42 Value Digital lossCarrier signal lost or not detected Command executedRing signal detected Invalid commandPage Basic Procedure Remote ConfigurationSetup Changing the Remote Escape Character None of the Indicators Light TroubleshootingModem Does Not Respond to Commands Modem Dials But Cannot Connect Modem Doesn’t Work with Caller ID Modem Cannot Connect When AnsweringModem Disconnects While Online Fax and Data Software Can’t Run at the Same TimeDid Troubleshooting Appendix a Regulatory Compliance FCC Part 68 TelecomCanadian Limitations Notice FCC PartFax Branding Statement Industry CanadaAppendix B Technical Specifications FaxUpgrade Overview Appendix C Upgrading the Modem’s FirmwareExtract the Upgrade Files Select Dialup Configuration Tool Appendix D Installing a Modem Under LinuxInstallation Standard Linux Serial Port DefinitionsCalling the ISP Select RH PPP DialerSymbols IndexMultiModemDID User Guide Index MultiModemDID User Guide Index