A Situation

We are developing a component (AM) that supports a wide system (OP)(powered by other company) .
AM will be installed on a separate and dedicate machine, and communicate with OP via the net. OP gets an XML include a request to process something and send the results for AM, once every 3 seconds.

To date I work only with nonseparated applications (the entire app work on the same machine). Coos ask me to present STP and to make a room to execute some network issues. I donít know where and how to start. What do you think that I have to test here? I mean that I know pretty well how to cover AM functionality and performances; however I donít know how to cover the interaction with OP.

Any answer will donate us.