Omega OMG-USB-SER-4 User Manual page 7

Installation
You can access your new COM: ports by using the assigned COM: identifiers as
shown above. In this case, it is COM3, 4, 5 and 6. However, this assignment will
vary from system to system. At this point, the hardware is recognized and ready
to use.
OMG-USB-SER-4 Page 3