Brainboxes CC-662 Hardware Manual page 28

PCI Photon 8 Port RS232
Clicking on the Serial Solutions tab will display:
Some communications applications require the serial ports
they access to be as named COM 4 or lower. The COM port
assignment may be changed, simply by selecting a new COM port
value from the pull down menu relevant to the port. However,
COM port usage other than those for the selected card itself are
not checked, so it is advisable to first check which COM ports are
in use - port availability can be checked by viewing the Device
Manager:
Software Installation
Click to access
Ports 5-8
Chapter 3 Page 28