TROUBLESHOOTING 51
THE “COM PORT IS EITHER IN USE OR UNAVAILABLE” OR “PORT NOT OPEN” ERROR MESSAGE APPEARS.
An incorrect Interrupt Request Line (IRQ) may be assigned to the COM port. Most computers have
■COM1 and IRQ4
■COM2 and IRQ3
■COM3 and IRQ4
■COM4 and IRQ3
If PC Card Services has assigned different combinations for the COM port and IRQ, you must reassign these numbers accordingly. To reassign your COM port and IRQ, use PC Card Services or the appropriate settings utility for your operating system.
THERE IS A POSSIBLE CONFLICT BETWEEN THE PC CARD AND YOUR SERIAL MOUSE.
Perform the following test:
1.Remove your Netopia ISDN PC Card from your PC Card slot and
2.Activate a terminal emulation program.
3.Enter $Xmit. Press Enter until the PC Card responds with the following display:
NetopiaCard Xmit test: Enter to start, Enter to stop
4.Press Enter again. The card will continuously transmit this line:
ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijkl
To check if there is a conflict with the mouse, move the mouse around during the Xmit test. If this causes the transmission to stop or display meaningless characters on your screen, there is probably a conflict, and the mouse driver must be removed or reconfigured to another IRQ.
