INVITE sip:user@example.com SIP/2.0
CSeq: 193942 INVITE
Via: SIP/2.0/UDP 192.0.2.95;branch=z9hG4bKkdj.insuf
Content-Type: application/sdp
l: 152

v=0
o=mhandley 29739 7272939 IN IP4 192.0.2.95
s=-
c=IN IP4 192.0.2.95
t=0 0
m=audio 49217 RTP/AVP 0 12
m=video 3227 RTP/AVP 31
a=rtpmap:31 LPC