Before I reinvent the wheel and go write it, is there a utility which will simulate making & receiving calls (i.e. SIP conversations, **plus RTP**) in scale (to answer a question like "will my SIP+RTPproxy deployment scale for {100,1000,10000,100000} users using the following parameters for average call duration, % phones in use etc."
If not, anyone have any recommendations for a (free) stack that does a decent UAC/UAS job, including audio, and will run without GUI?
Alex