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Nortel Networks CTA 500dm manual AT command problem?

Models: CTA 500dm

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Page 72

AT command problem?

72 Troubleshooting

¥If the cable is faulty or the ICS is down, the attached phone will also not work.

AT command problem?

The CTA 500dm does not respond to AT commands sent from your PC.

¥Make sure that your PC, terminal or other DTE is conÞgured correctly.

¥Check the DTE connection. If the DTE is conÞgured as a DCE you may need a null modem cable.

¥Check that your PC or DTE is conÞgured to expect CD and CTS signals. See ÒSerial Interface Control LinesÓ on page 56 for more information.

¥Check that the CTA 500dm is in the command mode.

¥Check that your PC or DTE is conÞgured to provide a DTR signal. See ÒSerial Interface Control LinesÓ on page 56 for more information.

¥If the LED is ßashing quickly, refer to the ConÞguration section of this document.

¥Check that the CTA 500dm serial port is set to the correct baud rate (115200 is required for all cases except during a software upgrade) using ÒSerial Interface RateÓ on page 54.

Echoed AT commands from the CTA 500dm do not appear correctly on your PC, but the response messages appear correctly.

¥Check the echo option on your PC.

¥Disable echo if your PC displays duplicate characters. Enable echo if your PC does not display any characters.

¥See ÒSet Local EchoÓ on page 38 for more information.

AT response messages do not appear correctly on your PC but AT commands appear correctly.

¥If numbers are being returned to the PC instead of messages, change the message code setting on the CTA 500dm. See ÒVerbose ControlÓ on page 40 for more information. The numeric responses and indications are shown in ÒNumeric CTA 500dm responsesÓ on page 83.

¥Make sure that your terminal is operating in full duplex mode rather than half duplex mode.

CTA 500dm On Line Guide

P0873832 Issue 05

Image 72

Nortel Networks CTA 500dm manual AT command problem?, ¥ See ÒSet Local EchoÓ on page 38 for more information

Contents

CTA 500dm The CTA 500dm in the Digital NetworkUsing a CTA 500dm compliant Norstar TAPI Service Provider, the Applications CTA 500dm feature summary About this documentFirst-time setup See Installing CTA 500dm and Norstar TAPI Service Provider software6 First-time setup P0873832 IssueCTA 500 dm On Line Guide Installation and setup Wall mounting the CTA 500dm Setting up the ICS Compact ICSModular ICS Setting up the PC ¥ Installing CTA 500dm and Norstar TAPI Service Provider software Conﬁguration¥ ConÞguring the PC serial port Installing CTA 500dm and Norstar TAPI Service Provider software Conﬁguring the PC serial port8. Click OK Conﬁguring the CTA 500dm if not conﬁgured during installation Conﬁgure CTA 500dm to access PP/MP data calls Adding multiple CTA 500dm conﬁgurations Uninstalling the CTA 500dm Upgrading the CTA 500dm softwareP0873832 Issue 18 ConﬁgurationCTA 500dm On Line Guide Installing Norstar TAPI SP Conﬁgure TAPI dialing propertiesInstalling Personal Call Manager Using PCM for the ﬁrst time 22 Installing Norstar TAPI SP P0873832 IssueCTA 500dm On Line Guide ¥ Installing Dial-Up Server ¥ Allowing access to your PC ¥ Connecting to a Windows 95 Dial-Up Server¥ Connecting to Resources on the Dial-Up Server Resource sharingInstalling Dial-Up Server Allowing access to your PCConnecting to a Windows 95 Dial-Up Server Connecting to Resources on the Dial-Up Server Note Windows Explorer displays the new drive letter 7. Click OK CTA 500dm On Line GuideP0873832 Issue 28 Resource sharingCTA 500dm On Line Guide AT commands ¥ General commands ¥ S-registers commands ¥ Call Control commands¥ TCM Ports Protocol Selection commands ¥ Serial Interface commands ¥ Serial Interface Control Lines commandsProﬁle commands summary ProﬁleLoad Stored Proﬁle Load Stored Proﬁle on Start-upState Write Active Proﬁle to MemoryState commands summary Return to On-line Data State Enter Download StateGeneral commands summary GeneralEscape Sequence 36 AT commands Commandset echo command turn echo on defaultRequest Identiﬁcation View Parameters Set Local EchoSave Dial String Display Saved Dial StringVerbose Control Result Code Suppression ControlCTA 500dm responsesÓ on page S-register commands summary S-registersCall Monitoring Result Code Selection Set S-Register Query S-RegisterS-register set Call Control commands summary Dial CommandCall Control Press any key before the call is completed to abort the Dial Command Answer Command Hook Command Outgoing Call Control commands summaryOutgoing Call Bearer Service Control Outgoing Call ControlIncoming Call Control Channel Speed ControlIncoming Call Control commands summary Incoming Voice Bearer Call Ratemessages. See ÒBearer CapabilitiesÓ on page 81 for more information Speech Bearer Call Answer Control Audio Bearer Call Answer ControlData Bearer Call Answer Control Ringing IndicationsTCM Port Protocol Selection Command TCM Ports Protocol SelectionRate Adaptation Protocol Selection MP command summary CTI MUX ModeRate Multiplier Serial Interface commands summary Serial InterfaceSerial Interface Rate Set Parity Set Data BitsSet Stop Bits Serial Interface Control LinesSerial Interface Control Lines commands summary Flow ControlThe Flow Control Command sets the method of ßow control on the interface between theOK Appears when the value is supported DCD Operation DTR OperationCTS Operation Calling Line ID DSR OperationRI Operation Calling Line ID commands summary Calling Line ID Delivery ControlResult Codes Calling Line ID QueryCaller ID Security Caller ID security commands summary Caller ID Security Mode SelectionAdd Number select CLID security modeDelete Number Clear ListView List See ÒView ParametersÓ on page 38 for more informationSummary of AT commands AT commands 68 AT commands Commanddata bearer service defaultAT commands 70 AT commands CommandP0873832 Issue DescriptionTroubleshooting Power problem?LED problem? AT command problem? ¥ See ÒSet Local EchoÓ on page 38 for more informationData call problem? ¥ Check that you are subscribing to an MP capable service Canadian & US Safety Installation Instructions Please Read Carefully AppendixImportant Safety Instructions 1. Read and understand all instructionsCANADIAN AND US REGULATIONS 15. Save these instructionsEMI/EMC For Class A Host equipmentFor Class B Host equipment WARRANTY INFORMATION Address for warranty and repairs in the United StatesAddress for warranty and repairs in Canada Rate adaptation protocol speciﬁcations ¥ Point-to-Point Protocol ¥ Multilink PPPBearer Capabilities CTA 500dm LED Numeric CTA 500dm responses Initialization stringsDB-25 and DB-9 signal summary DB-25 connectionAcronyms used in this document LEDÑLight Emitting Diode