INVITE sip:user@example.com; lr SIP/2.0
To: sip:user@example.com;tag=3xfe-9921883-z9f
From: sip:caller@example.net;tag=231413434
Max-Forwards: 5
Call-ID: lwsruri.asdfasdoeoi2323-asdfwrn23-asd834rk423
CSeq: 2130706432 INVITE
Via: SIP/2.0/UDP 192.0.2.1:5060;branch=z9hG4bKkdjuw2395
Contact: <sip:caller@host1.example.net>
Content-Type: application/sdp
Content-Length: 159

v=0
o=mhandley 29739 7272939 IN IP4 192.0.2.1
s=-
c=IN IP4 192.0.2.1
t=3149328700 0
m=audio 49217 RTP/AVP 0 12
m=video 3227 RTP/AVP 31
a=rtpmap:31 LPC
