INVITE sip:1002@1.2.3.4:34705;transport=UDP;rinstance=3c7c8735904e9910 SIP/2.0
Via: SIP/2.0/UDP 5.6.7.8:5060;rport;branch=z9hG4bKPj3e4f81a9-9827-45b0-bfc7-80a2f7fca508
From: <sip:9876543210@5.6.7.8>;tag=d83af259-fe8c-40e3-9575-774e513325c8
To: <sip:1002@1.2.3.4;rinstance=3c7c8735904e9910>
Contact: <sip:asterisk@5.6.7.8:5060>
Call-ID: 5a032c45-826c-46e0-9788-80343b73442b
CSeq: 15767 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=Z 0 1 IN IP4 192.168.1.10
s=Z
c=IN IP4 5.6.7.8
t=0 0
m=audio 35236 RTP/AVP 8 0 101
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=sendrecv