[Twisted-Python] TCP test harness

[Braun Brelin]

Has anyone written a TCP test harness in Twisted/Python? 
Someone has asked me to write one, but I'm fairly new to twisted (less
new to Python) and it seems that it would be silly for me to write
something if someone else has already written and/or posted one. 

Basically, I'm looking for a TCP test harness that will support up to a
thousand concurrent TCP connections at a time sending data to a remote
device. 

Thanks,

Braun Brelin