or download this
CREATING SOCKET AND LEG... OK
CREATING RTP... OK
...
1285608702.1284 DEBUG:<2> REQ OPTIONS sip:user@xxx.xxx.xx.xx:43
+289
1285608703.1282 DEBUG:<2> Net::SIP::Leg::receive[421]: received on xxx
+.xxx.xx.xx:43289 from yyy.yyy.yy.yy:5060 packet
1285608703.1282 DEBUG:<2> REQ OPTIONS sip:user@xxx.xxx.xx.xx:43
+289