The program emulates one or couple of RS-232 serial ports connected via virtual null-modem cable. It is possible to create the unlimited couples of virtual serial ports on a single PC and connect them in any sequence using virtual null-modem cable.

Features: The purpose of a null-modem cable is to permit two RS-232 "DTE" devices to communicate with each other without modems or other communication devices (i.e., "DCE"s) between them. Virtual Null Modem is a utility, which purpose is to emulate one or more RS232 serial ports connected via virtual null-modem cable. Otherwise, you can create any number of pure virtual serial ports in your system (COM10, COM11, COM127 etc), that will be connected to each other via virtual null-modem cable. It is possible to create the unlimited couples of VSP on a single PC without additional hardware and connect them in any sequence using virtual null-modem cable. Usually you need to use virtual null-modem when you have two applications to be connected via serial ports.

If you have two applications you want to connect to each other using serial ports you need a null modem. A null modem is basically a cable to connect two serial ports to each other. Normally you need two computers or two physical ports on one computer to achieve this. Using Virtual Null Modem software you can emulate the null modem and run the two applications on the same computer without any additional hardware. For example you can create two virtual serial ports: COM10 and COM12 and connect two different applications to them. Everything, that application #1 will send to COM10 will be received by application #2 at COM12, and all that application #2 sends to COM12 will be received by application #1 at COM10.

Overall: An application for a very specific and simple functionality.