After you add it, you need to make sure you have set the proper baud rate in its configuration page ( you can access it by typing its IP in a browser from a computer in its internal network. (If you don't know the IP allocated for the GC100, you can find it in web admin / Interfaces, find GC100 in the list and go to 'Advanced'
Thank you for your reply! I do already have a good connection from my linuxmce machine to the gc100, and from there to the amplifier. I tested the connections by turning the amp off and on by sending the rs232 codes directly to tcpip port 4999, and it worked. However! I am not sure how to accomplish this within linuxmce.
Do I make the amp a child device of the gc100?