Troubleshooting
51
T
HE
“COM P
ORT
IS
EITHER
IN
USE
OR
UNAVAILABLE
”
OR
“P
ORT
NOT
OPEN
”
ERROR
MESSAGE
APPEARS
.
An incorrect Interrupt Request Line (IRQ) may be assigned to the
COM por t. Most computers have pre-assigned an IRQ# to each
COM#. These include the following:
■
COM1 and IRQ4
■
COM2 and IRQ3
■
COM3 and IRQ4
■
COM4 and IRQ3
If PC Card Ser vices has assigned different combinations for the
COM por t and IRQ, you must reassign these numbers accordingly.
To reassign your COM por t and IRQ, use PC Card Ser vices or the
appropriate settings utility for your operating system.
T
HERE
IS
A
POSSIBLE
CONFLICT
BETWEEN
THE
PC C
ARD
AND
YOUR
SERIAL
MOUSE
.
Per form the following test:
1.
Remove your Netopia ISDN PC Card from your PC Card slot
and re-inser t it.
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.
