https://www.virtual-null-modem.com/
Virtual Null Modem - Two virtual serial ports connected with each other via virtual null modem cable
Virtual Null Modem is a utility which purpose is to emulate one or more virtual RS232 serial ports connected via virtual null-modem cable.
virtual null modemserial ports
https://www.virtual-serial-port.com/virtual-serial-port-kit.html
Virtual Serial Port Kit - Create virtual serial ports connected via a virtual null-modem cable.
Virtual Serial Port Kit creates virtual serial ports and connects each pair of them via a virtual null-modem cable. Applications can exchange data just like...
virtual serial port kit