Avaya Partner 18 Connection Manual page 278

Troubleshooting
134 or 141
200 and above
Problem 3: AT&TConnect will not work on COM3 or COM4
By default many PCs are not configured to permit the simultaneous use of
three or more COM ports. Specifically, most PCs are configured such that
COM ports are grouped into pairs: COM1 is paired with COM3, and COM2 is
paired with COM4. By default such PCs permit only one COM port from each
pair to be operating at the same time (for example, COM1 with COM2). COM
ports within the same pair will usually conflict with one another and are not
supported (that is, COM1 with COM3, or COM2 with COM4).
The PassageWay
adapter cannot
communicate
properly with your
telephone.
A conflict or
application error has
occurred which
prevented
AT&TConnect from
operating your PC
serial port.
Try replacing the 7-
foot telephone
cable between the
PassageWay
adapter and your
telephone.
Try closing all
Windows
applications except
AT&TConnect and
Program Manager,
then try the test
again.
You may need to
modify your
"autoexec.bat" and
"config.sys" files to
eliminate this
conflict.
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