HW Virtual Serial Driver is primary designed for HW group devices, but it can be used for free as an universal driver to create a remote serial port,which redirects serial (RS232) data to the predefined TCP/IP address and port. For special applications (ex. GPRS devices) is possible that the PC with the Virtual driver installed can work also as a server, so the connection might be initialized from the external device by sending any data to the remote port. The converter opens the connection with PC and sends the data to the virtual com. The whole situation is quite the same as with a normal serial port, but our device can be as far away as you want HW VSP can not be used to connect two physical ports of two PCs through the network (virtual null modem), because the HW VSP redirector works always with virtual serial ports. If you are using the HW group's network devices with enabled NVT, you can change the Baud Rate, Parity and other communication properties (ex. binary inputs and outputs) during the normal communication using the RFC2217 standard, so you have a real remote port.