U 2012/03/05 08:39:12.288629 2.2.2.2:5060 -> 1.1.1.1:5068
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 1.1.1.1:5068;branch=z9hG4bK99cf.43b86535.0.
From: <sip:8123364021@1.1.1.1:5068;transport=UDP>;tag=29310508.
To: <sip:3364000@1.1.1.1:5068;transport=UDP>;tag=41446BA8-C70.
Date: Mon, 05 Mar 2012 05:39:08 GMT.
Call-ID: MzJlOTQyNWFiMzk2MTU2ODA2OWY5OTBlYTlkZjhmOTE..
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 2 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO.
Allow-Events: telephone-event.
Contact: <sip:3364000@2.2.2.2:5060>.
Content-Type: application/sdp.
Content-Length: 237.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 4613 494 IN IP4 2.2.2.2.
s=SIP Call.
c=IN IP4 2.2.2.2.
t=0 0.
m=audio 18152 RTP/AVP 8 101.
c=IN IP4 2.2.2.2.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.


U 2012/03/05 08:39:12.294399 1.1.1.1:5068 -> 3.3.3.3:5061
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 3.3.3.3:5061;branch=z9hG4bK-d8754z-4ab595452e6efcd7-1---d8754z-;rport.
From: <sip:8123364021@1.1.1.1:5068;transport=UDP>;tag=29310508.
To: <sip:3364000@1.1.1.1:5068;transport=UDP>;tag=41446BA8-C70.
Date: Mon, 05 Mar 2012 05:39:08 GMT.
Call-ID: MzJlOTQyNWFiMzk2MTU2ODA2OWY5OTBlYTlkZjhmOTE..
Server: Cisco-SIPGateway/IOS-12.x.
CSeq: 2 INVITE.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, COMET, REFER, SUBSCRIBE, NOTIFY, INFO.
Allow-Events: telephone-event.
Contact: <sip:1.1.1.1:5068;did=56c.6d1daf55>sip:3364000@2.2.2.2:5060.
Content-Type: application/sdp.
Content-Length: 255.
.
v=0.
o=CiscoSystemsSIP-GW-UserAgent 4613 494 IN IP4 1.1.1.1.
s=SIP Call.
c=IN IP4 1.1.1.1.
t=0 0.
m=audio 44258 RTP/AVP 8 101.
c=IN IP4 1.1.1.1.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=nortpproxy:yes.