U 2010/06/25 21:01:37.156354 220.224.129.21:5060 -> 87.106.166.145:5060
SIP/2.0 481 Unknown Dialog.
Via: SIP/2.0/UDP 87.106.166.145;branch=z9hG4bK0f1e.94076107.0.
Via: SIP/2.0/UDP 66.234.138.73:5061;received=66.234.138.73;branch=z9hG4bKc2ac35115849decb182a08e1199b4768;rport=5061.
From: <sip:18182557014@66.234.138.73>;tag=a95529d8630fabcc3a6c37aaa2a7e68a.
To: <sip:37410230653@87.106.166.145>;tag=97.56.30.751064+1+27170028+55f292df.
Call-ID: 7B556361-7FCA11DF-9C6B9643-3FD0180@66.234.138.68.
CSeq: 211 BYE.
.