Sip read:
NOTIFY sip:yota.dyndns.org SIP/2.0
Via: SIP/2.0/UDP 192.168.1.125:5060;branch=z9hG4bK-c51c3b2a;rport
From: 2001 <sip:2001@yota.dyndns.org>;tag=a209161bd33820e7o0
To: <sip:yota.dyndns.org>
Call-ID: dca21d43-f56a8b79@192.168.1.125
CSeq: 103 NOTIFY
Max-Forwards: 70
Event: keep-alive
User-Agent: Sipura/SPA3000-2.0.11(GWg)
Content-Length: 0


10 headers, 0 lines
Transmitting (no NAT):
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.1.125:5060;branch=z9hG4bK-c51c3b2a
From: 2001 <sip:2001@yota.dyndns.org>;tag=a209161bd33820e7o0
To: <sip:yota.dyndns.org>;tag=as2de5aaa5
Call-ID: dca21d43-f56a8b79@192.168.1.125
CSeq: 103 NOTIFY
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact:
Content-Length: 0


 to 80.12.162.115:5060