INVITE sip:+1-650-555-2222@iftgw.there.com;user=phone SIP/2.0
Via: SIP/2.0/UDP ss1.wcom.com:5060; branch=2d007.1
Via: SIP/2.0/UDP ift.here.com:5060
Record-Route: <sip:+1-650-555-2222@iftgw.there.com;
 maddr=ss1.wcom.com>
From: <sip:+1-303-555-1111@ift.here.com;user=phone>
To: <sip:+1-650-555-2222@ss1.wcom.com;user=phone>
Call-ID: 1717@ift.here.com
CSeq: 17 INVITE
Contact: <sip:+1-303-555-1111@ift.here.com;user=phone>
Content-Type: application/sdp
Content-Length: 151

v=0
o=IFAXTERMINAL01 2890844527 2890844527 IN IP4 ift.here.com
s=Session SDP
c=IN IP4 iftmg.here.com
t=0 0
m=audio 3456 RTP/AVP 0
a=rtpmap:0 PCMU/8000