OPTIONS sip:193.26.159.126:9999 SIP/2.0
Via: SIP/2.0/TCP 193.26.159.126:9999;branch=z9hG4bKe953b36d
Max-Forwards: 70
From: <sip:scanner@193.26.159.126>;tag=e953b36d
To: <sip:193.26.159.126:9999>
Call-ID: e953b36d@193.26.159.126
CSeq: 1 OPTIONS
Contact: <sip:scanner@193.26.159.126:9999>
Accept: application/sdp
Content-Length: 0