OPTIONS sip:t.watson@example.org SIP/2.0
Via:     SIP/2.0/UDP c.example.com:5060;branch=z9hG4bKkdjuw
Max-Forwards:      70
From:    Bell, Alexander <sip:a.g.bell@example.com>;tag=43
To:      Watson, Thomas <sip:t.watson@example.org>
Call-ID: baddn.31415@c.example.com
Accept: application/sdp
CSeq:    3923239 OPTIONS
l: 0
