For these kinds of SIP scenarios you could just use sipp (http://sipp.sourceforge.net/ http://sipp.sourceforge.net/) and craft a simple scenario file like http:

For these kinds of SIP scenarios you could just use sipp (http://sipp.sourceforge.net/ http://sipp.sourceforge.net/) and craft a simple scenario file like http://sipwise.com/reg_srv.xml.txt http://sipwise.com/reg_srv.xml.txt instead. Start with "sipp -sf /path/to/reg_srv.xml -i <local ip> -p <local port>" and you're done.