The modem works well when you are not using data compression,

28

but the compression features are inoperative.

 

General Troubleshooting

Problem: Your modem seems to install under Windows 95 or 98, but Windows cannot find it later.

Solution: If your computer has a built-in modem on the motherboard, Windows may reinstall it the next time you start up. Consult your computer’s documentation or call your computer’s manu- facturer to get instructions on how to disable the built-in modem.

Problem: The software cannot find the modem and the modem does not respond to AT commands. (The following comment applies to many other problems as well.)

Solution: The most common error with modems is that the communications software is not configured for the same COM port as the modem. Check which COM port the modem is using. Make sure that the software’s COM port setting matches the modem’s COM port setting.

Another problem is that COM port resources may be in use by another device. Make sure that the COM port resources used by the mo- dem are not being used by any other device, such as a soundcard.

Problem: You type an AT command line in a terminal application and press Enter, but your mo- dem fails to execute the command line. Or there was no response after executing a command.

Solution: Be sure you type AT at the beginning of the command line.

Make sure the communications software is con- figured for the same COM port as your modem.

Be sure your modem is not in data mode when you type the command. Use the escape char- acter sequence to switch to terminal mode. (The default escape sequence is to wait at least one

Chapter 4 Problems and Solutions

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Zoom 1120, 2925 quick start General Troubleshooting
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1120, 2925 specifications

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