Reliably Transmitting (NAT) to KAMAILIO:5060:
UPDATE sip:peer@CLIENTIP:5063 SIP/2.0
Via: SIP/2.0/UDP ASTERISKIP:5060;branch=z9hG4bK09f43c03;rport
Route: <sip:KAMAILIO;lr=on;ftag=as681d82e4>
Max-Forwards: 70
From: "11" <sip:11@ASTERISKIP>;tag=as681d82e4
To: <sip:peer@KAMAILIO>;tag=3cd67abd8c6be4di3
Contact: <sip:11@ASTERISKIP:5060>
Call-ID: 3553fc41465ab3dd107597f26fd3c05a@ASTERISKIP:5060
CSeq: 103 UPDATE
User-Agent: PBX
Remote-Party-ID: "+4312361503" <sip:+4312361503@ASTERISKIP>;party=calling;privacy=off;screen=yes
X-Asterisk-rpid-update: Yes
Content-Length: 0