I'm not aware of a single utility that does serial to TCP conversion, however if you programmed in VISA there's a chance that you could create a TCP resource and just do all of your communication still through VISA without needing to change your code. In MAX you can right click on Devices and Interfaces and choose to create a VISA TCP Resource. If you have the IP address and the TCP port, you can create a resource that links to your device and from that point, you should be able to access that resource with your program that is written using VISA. However, this depends on your original program using VISA.
Logan S.