MaxTech V.42bis, V.32bis user manual Section Six Troubleshooting

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CONNECT 7200/REL-MNP

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CONNECT 1200/REL-LAPM

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Section Six - Troubleshooting

This section describes some of the common problems you may encounter while using your modem. If you can not resolve your difficulty after reading this chapter, contact your dealer or vendor for assistance.

Modem does not respond to commands.

1.Make sure the modem is not configured with a conflicting COM port and IRQ setting (see Section 2.4). Your modem can not be configured as COM1 (default) if another device in your system is also configured as COM1. Similarly, IRQ settings may not overlap.

2.Make sure the communication software is configured to “talk” to the modem on the correct COM port and IRQ setting (same COM port and IRQ setting as the modem). Your communication software must know which address your modem is using in the system in order to pass data to it.

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Contents Contents Hardware Installation Unpacking Your ModemSoftware Installation/Configuration Fasten the retaining bracketPage COM Port and Interrupt Settings Devices in your computer cannot share an IRQ withTesting Your Modem After Installation Using Your ModemExecuting Commands Where To Go From HereCommand Structure Basic AT Commands Extended AT Commands Force DSR Signal High on Mode after DTR toggleGuard tone disabled Enable Trellis Coding @Enable Auto Fall Forward/Back 22bis auto-retrain disabled22bis auto-retrain enabled Disable Auto Fall Forward/BackFax Class 1 Commands Voice Mode Commands S Registers Function Range/units Default Basic Response Codes Modem does not dial Modem does not respond to commandsModem dials but does not connect High pitch tone is heard whenever you answer the phone Modem makes a connection but no data appears on your screenModem exhibits poor voice record or playback FCC Compliance UartFCC Class B Statement DOC Compliance InformationDisclaimer, Copyright, And Other Notices Section One Introduction Software Installation/Configuration COM Port and Interrupt Settings Switch Block SW-1 Location Switch Block Settings Testing Your Modem After Installation Originate calls in answer mode Bold text Command Function Manually answer incoming callCcitt mode With AT or follow with EnterCommands are not echoed Toggle Resets modem after DTR toggleRecall factory default configuration Hz guard toneMNP/V.42/V.42bis Commands \A3\Q3 Switch to reliable link from normal link Register Function Range/units Default S RegistersSection Five Result Codes Section Six Troubleshooting Modem does not dial Power 75 W Section Eight Support and Service DOC Compliance Information Disclaimer, Copyright, And Other Notices