Soft Maximum - best free downloads
virtual null modem cable

Virtual Null Modem
Null-modem cable is basically used for communication of two RS-232 "DTE" devices ... reliable way to create null-modem connection is using of virtual serial ports emulated by virtual serial port driver and null-modem ...

Virtual Serial Port Kit
Virtual Serial Port Kit creates pairs of virtual serial ports in your system which are virtually connected to each other. Physical null modem cables are not required. You can connect any number of virtual port ...

1