Network Serial Port Kit 

Network Serial Port Kit allows you to connect any serial port devices over TCP/IP network or Internet. Program creates and connects up to 254 virtual serial ports at a time. Physical COM ports can be connected over the network as well.
network serial port network com port com port to ethernet serial port to ethernet com port to tcp/ip serial port to tcp/ip rs232 to ethernet com port to ethernet shared port shared com port virtual com port virtual serial port virtual rs232 virtual serial