Troubleshooting - 3Com 56k User's Manual And Reference

Troubleshooting

PROBLEM
The computer or software will not recognise the modem.
POSSIBLE SOLUTION
Make sure the modem is plugged in and turned on. Use only the power adaptor included with your modem.
POSSIBLE SOLUTION
You may not be entering modem commands in the proper manner. Type in all upper case (AT) or all lower
case (at).
POSSIBLE SOLUTION
The COM port may not be enabled. Refer to your computer's manual for information about enabling COM
ports (usually involves altering the bios settings, motherboard jumpers, and the operating system).
POSSIBLE SOLUTION
You may be using the wrong serial cable with your external faxmodem. Make sure you are using an RS-232
modem cable. You will need to make sure you are using a 25-pin male to 25-pin female if your COM port is a
25-pin port, or a 25-pin male to 9-pin female if your COM port is a 9-pin port.
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