sessioninvite.msg

SIP（Session Initiation Protocol）是由IETF定义

INVITE sip:6500@128.107.140.141:5065;user=phone SIP/2.0
Via: SIP/2.0/UDP 128.107.140.141:5064
From: 6400<sip:6400@128.107.140.141:5064>
To: 6500<sip:6500@128.107.140.141:5065;user=phone>
Call-ID: 247515495@128.107.140.140
CSeq: 1 INVITE
Subject: VovidaINVITE
Contact: <sip:6400@128.107.140.141:5064>
Session-Expires: 60;refresher=uac
Min-SE: 30
Content-Type: application/sdp
Content-Length: 168

v=0
o=- 99513809 99513809 IN IP4 128.107.140.140
s=VOVIDA Session
c=IN IP4 128.107.140.140
t=962892393 0
m=audio 3456 RTP/AVP 0
a=rtpmap:0 PCMU/8000
a=ptime:20