sipsak
http://sourceforge.net/projects/sipsak.berlios/
sipsak is a small comand line tool for developers and administrators of SIP applications. It can be used for some simple tests on SIP applications and devices.
Features
- sending OPTIONS request
- sending text files (which should contain SIP requests)
- traceroute (see section 11 in RFC3261)
- user location test
- flooding test
- random character trashed test
- interpret and react on response
- authentication with qop supported
- short notation supported for receiving (not for sending)
- string replacement in files
- can simulate calls in usrloc mode
- uses symmetric signaling and thus should work behind NAT
Available for Linux, BSD & Win32
See also
Open Source VOIP Software