I'm running the server on a win2000 box, and the client is winXP. The switch can't be configured, but I have an ADSL-router (Cisco 677i-DIR). I've never played with it but I know I can telnet into it.

I can of course buy a modem, but I would like to see how my app works at different speeds (56 Kb/sec, 128 Kb/sec, 560 Kb/sec (Modem, ISDN, Cable).