OPTIONS sip:64.225.25.190:9999 SIP/2.0
Via: SIP/2.0/TCP 64.225.25.190:9999;branch=z9hG4bKb63b9b4b
Max-Forwards: 70
From: <sip:scanner@64.225.25.190>;tag=b63b9b4b
To: <sip:64.225.25.190:9999>
Call-ID: b63b9b4b@64.225.25.190
CSeq: 1 OPTIONS
Contact: <sip:scanner@64.225.25.190:9999>
Accept: application/sdp
Content-Length: 0