test/sg.sip
69125581
 INVITE sip:theCallee@iptel.org SIP/2.0
 Via: SIP/2.0/UDP sipproxy.icr.a-star.edu.sg:5060;branch=QdqKUsYZOGRR+j*P
 Via: SIP/2.0/UDP 137.132.31.151:58072;branch=NTg2NTIwNzUw
 Max-Forwards: 68
 From: sip:Acaller@icr.a-star.edu.sg:6060;tag=MTU3MT

 To: sip:theCallee@iptel.org

 Call-ID: 1953014-jQ4MzYwNzUw-2137014
 CSeq: 123456 INVITE
 Contact: <sip:Acaller@137.132.31.151:58072>
 Content-Type: application/sdp
 Content-Length: 153
 
 v=0
 o=User 1589702922991241424 1420814338471844940 IN IP4 137.132.31.151
 s=
 c=IN IP4 137.132.31.151 UNHOLD UNHOLD
 m=audio 58074 RTP/AVP 0 
 a=rtpmap:0 PCMU/8000