ADLINK cPCI-3544 - Manual (Page 35)

Installation
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2.5.5 Windows 95/98/NT Utility Diagram for cPCI-3544
The cPCI-3534/3538 does not require any configuration utility. It is similar
to the system COM ports.
The cPCI-3544 is a 4-Port RS-422/485 serial communication module. It
supports the software configuration for RS-422/485. When choosing the
RS-422 mode, the RS-485 port would be disabled automatically.
AdlComSet.exe can be used for configuration.
Existing Cards and
its port distribution
Press here for COM
Port Number Setting