How it works
Serial Port Mapper maps existing physical COM ports to any aliases you need.
As soon as the program assigns a new name to the selected physical serial port
(for instance a COM1 alias is assigned to existing COM8 serial port),
a communications application becomes capable to open necessary physical COM port using a new assigned name.
Serial Port Mapper redirects all the data and signals from the hardware serial port to its alias.
So, the COM port which has been unavailable for communications applications now becomes available and suitable for work.