INVITE sip:watson@boston.bell-tel.com SIP/2.0
Via: SIP/2.0/UDP kton.bell-tel.com
From: A. Bell <sip:a.g.bell@bell-tel.com>;tag=3
To: T. Watson <sip:watson@bell-tel.com>
Call-ID: 662606876@kton.bell-tel.com
CSeq: 1 INVITE
Contact: <sip:a.g.bell@kton.bell-tel.com>
Subject: Mr. Watson, come here.
Content-Type: application/sdp
Content-Length: 120

v=0
o=bell 53655765 2353687637 IN IP4 128.3.4.5
s=Mr. Watson, come here.
c=IN IP4 kton.bell-tel.com
t=3149328600 0