Virtual Serial Port
One variant of a COM port redirector is a virtual serial port. A virtual serial port is a redirector without network software support which is usually used to create a pair of back-to-back virtual COM ports on the same computer. Two legacy applications can then communicate using virtual serial ports instead of conventional inter-process communication mechanisms such as named pipes.
This type of software is capable of emulating all serial port functionality, including Baud rate, data bits, parity bits, stop bits, etc. Additionally, it allows the data flow to be controlled, emulating all signal lines (DTR/DSR/CTS/RTS/DCD/RI) and customizing pinout.
Read more about this topic: COM Port Redirector, Variants
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