3Com PC Card manual Modem Troubleshooting, COM Port Conflict

52CHAPTER 5: USING THE MODEM

Modem

Troubleshooting

Symptom	Solution
COM Port Conflict	Indicates a conflict between two drivers claiming the same IRQs.
	Change one of the IRQs. Remember that the modem interface
	of the LAN+Modem card is a Winmodem and uses COM5 or
	higher.
Cannot hear modem or	Make sure your computer's speaker is turned on (ATM1). Turn
speaker	your speaker volume on (ATL3).
	With the default audio settings for Windows 98, the sound may
	be disabled. To enable the sound, use the following procedure:
	1 Locate the speaker icon in the system tray.
	If there is no speaker icon in the system tray, open the
	Control Panel and double-click Multimedia. On the Audio
	page, make sure Show volume control on the task bar is
	checked
	2 Double click the speaker icon in the system tray.
	3 When the Master Out window opens, select Options.
	4 Choose Properties and make sure the Mono In box is
	checked. Click OK.
	5 When the Master Out window is redisplayed, check Mono In
	Balance. Ensure that the mute box is unchecked.
Error Message	Make sure you selected the correct COM port in your software.
	If you are typing from the command line in terminal mode,
	retype the command.
	Make sure you are issuing the correct command.
Modem does not dial	Make sure you have entered the telephone number correctly if
correctly	you are using the dialing directory.
	Make sure the number you dialed is correct if you are dialing it in
	terminal mode.
	Be sure you added any required prefix (such as 1) before your
	number when dialing long distance.
	The other line could be busy or not answering. Make sure it is
	available to answer before calling.
	If you are dialing internationally, your modem may not recognize
	the dial tone. Try the command ATX3DT and the telephone
	number.
Modem not responding	Check your computer's BIOS setup. If it requires certain settings
	for modems, be sure they have been turned on.
	Make sure you have selected the correct COM port in your
	software setup.
	Make sure the modem has been connected completely. Check
	all your connections and make sure they are all secure.
	Reboot your system.