Your browser does not allow scripts
Please click here to view a static table of contents without scripts
Return to Introduction  Previous page  Next page
A common problem occurs in a manufacturing environment when it is required to test serial converter cables by installing them as COM ports. When serialized cables are plugged in for testing, the system allocates a new COM port for every cable. If the system limit of 256 COM ports is reached, the only way to continue testing is to free up COM ports by uninstalling then reinstalling.

The problem occurs because the serialized cables appear to the system as unique devices, each device identified by its serial number and the serial number is used by the VCP driver when it creates a COM port. If the serial number was not used to create the COM port, then it would be possible setup an environment where every cable installed as the same COM port. Therefore, only one COM port would be needed to test any number of cables.

Here we describe how to configure the VCP driver to achieve this goal.