INVITE sip:1002@1.2.3.4:56761;transport=UDP;rinstance=dc6b6c3baf77a97a SIP/2.0
Via: SIP/2.0/UDP 5.6.7.8:5060;rport;branch=z9hG4bKPj8e90c4a0-5fe2-4946-9786-a96893e442fa
From: <sip:0123456789@5.6.7.8>;tag=5c4a31a8-a8b7-4054-bb6b-8206b765ac68
To: <sip:1002@1.2.3.4;rinstance=dc6b6c3baf77a97a>
Contact: <sip:asterisk@5.6.7.8:5060>
Call-ID: 021b5280-774a-4499-b4e3-51d7ff1140f2
CSeq: 16140 INVITE
Allow: OPTIONS, REGISTER, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, MESSAGE, REFER
Supported: 100rel, timer, replaces, norefersub, histinfo
Session-Expires: 1800
Min-SE: 90
Max-Forwards: 70
User-Agent: Asterisk
Content-Type: application/sdp
Content-Length:   237

v=0
o=- 831767643 831767643 IN IP4 5.6.7.8
s=Asterisk
c=IN IP4 5.6.7.8
t=0 0
m=audio 15496 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=maxptime:150
a=sendrecv