search for: simulalate

Hi folks! This is sort of OT but I thought maybe someone had a tip for me. What I'm looking for is a tool that I can install on two computer for example, put one on each side of the customers WAN and "try" the connection - simulalate x calls (using codec xxx) and get statistics out of it (delays, jitter, dropped packets and that sort of things). I have looked at ethertap (to debug the LAN traffic) and iperf but I don't know if it might help me. Is there anyone that have done such things and have any tip on software to use...