SIP/2.0 404 Not Found
Via: SIP/2.0/UDP sip.ieee.org ;branch=3d8a50dbf5a28d.1
Via: SIP/2.0/UDP c.bell-tel.com
From: A. Bell <sip:a.g.bell@bell-tel.com>;tag=3
To: T. Watson <sip:t.watson@ieee.org>;tag=87454273
Call-ID: 31415@c.bell-tel.com
CSeq: 1 INVITE
