Troubleshooting 43
Troubleshooting
COM Port Problems
This section lists some of the most common troubleshooting issues.
When you install an internal modem, you must assign the modem a
unique COM port setting, or with Windows 95/98, you sometimes
must change the COM port automatically selected with Plug-n-Play
modems. If your modem is set to use a COM port that is being used
by another device, you may experience COM port or IRQ conflicts.
Symptoms of COM Port or IRQ Conflict:
• The communications software cannot find the modem.
• Your computer locks up when accessing the modem.
• The modem doesn’t respond to AT commands.
• The modem works in some software applications, but not in others.
• The modem used to work, but doesn’t anymore.
• The serial mouse doesn’t function properly.
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