root@dev2:/tmp# ngrep -W byline -d lo port 5060
interface: lo (127.0.0.0/255.0.0.0)
filter: (ip or ip6) and ( port 5060 )
#
U 78.105.1.128:5060 -> 78.105.1.129:5060
INVITE sip:43780004711@dev-sip.tele500.com SIP/2.0.
Record-Route: <sip:78.105.1.128;lr=on;ftag=kmnzu>.
Via: SIP/2.0/UDP 78.105.1.128;branch=z9hG4bKf39d.08c55da7.0.
Via: SIP/2.0/UDP 78.105.1.131:5061;rport=5061;branch=z9hG4bKitxpbtxl.
Max-Forwards: 69.
To: <sip:0043780004711@dev-sip.tele500.com>.
From: "10000" <sip:10000@dev-sip.tele500.com>;tag=kmnzu.
Call-ID: sqxpicqwiduhiui@78.105.1.131.
CSeq: 908 INVITE.
Contact: <sip:10000@78.105.1.131:5061>.
Content-Type: application/sdp.
Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,PRACK,REFER,NOTIFY,SUBSCRIBE,INFO,MESSAGE.
Supported: replaces,norefersub,100rel.
User-Agent: Twinkle/1.1.
Content-Length: 250.
X-auth: 10000.
.
v=0.
o=10000 859362311 292900563 IN IP4 78.105.1.131.
s=-.
c=IN IP4 78.105.1.131.
t=0 0.
m=audio 8002 RTP/AVP 8 0 3 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:0 PCMU/8000.
a=rtpmap:3 GSM/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=ptime:20.

#
U 78.105.1.129:5060 -> 78.105.1.128:5060
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP 78.105.1.128;branch=z9hG4bKf39d.08c55da7.0;received=78.105.1.128.
Via: SIP/2.0/UDP 78.105.1.131:5061;rport=5061;branch=z9hG4bKitxpbtxl.
Record-Route: <sip:78.105.1.128;lr=on;ftag=kmnzu>.
From: "10000" <sip:10000@dev-sip.tele500.com>;tag=kmnzu.
To: <sip:0043780004711@dev-sip.tele500.com>.
Call-ID: sqxpicqwiduhiui@78.105.1.131.
CSeq: 908 INVITE.
Server: Asterisk PBX SVN-branch-1.6.1-r162896.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
Supported: replaces, timer.
Contact: <sip:43780004711@78.105.1.129>.
Content-Length: 0.
.

#
U 78.105.1.129:5060 -> 78.105.1.129:5060
INVITE sip:enum-test@sip.nemox.net:0 SIP/2.0.
Via: SIP/2.0/UDP 78.105.1.129:5060;branch=z9hG4bK0fa528b1;rport.
Max-Forwards: 70.
From: "John Smith" <sip:448447041774@78.105.1.129>;tag=as7afab3ac.
To: <sip:enum-test@sip.nemox.net:0>.
Contact: <sip:448447041774@78.105.1.129>.
Call-ID: 6c0e90183995b2ef6c88000a78e13337@78.105.1.129.
CSeq: 102 INVITE.
User-Agent: Asterisk PBX SVN-branch-1.6.1-r162896.
Date: Wed, 10 Dec 2008 22:44:19 GMT.
Session-Expires: 1800.
Min-SE: 90.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 356.
.
v=0.
o=root 1940585881 1940585881 IN IP4 78.105.1.129.
s=Asterisk PBX SVN-branch-1.6.1-r162896.
c=IN IP4 78.105.1.129.
t=0 0.
m=audio 18346 RTP/AVP 8 0 3 110 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:0 PCMU/8000.
a=rtpmap:3 GSM/8000.
a=rtpmap:110 speex/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=silenceSupp:off - - - -.
a=ptime:20.
a=sendrecv.

#
U 78.105.1.129:5060 -> 78.105.1.129:5060
SIP/2.0 482 Loop Detected.
Via: SIP/2.0/UDP 78.105.1.129:5060;branch=z9hG4bK0fa528b1;received=78.105.1.129;rport=5060.
From: "John Smith" <sip:448447041774@78.105.1.129>;tag=as7afab3ac.
To: <sip:enum-test@sip.nemox.net:0>;tag=as7afab3ac.
Call-ID: 6c0e90183995b2ef6c88000a78e13337@78.105.1.129.
CSeq: 102 INVITE.
Server: Asterisk PBX SVN-branch-1.6.1-r162896.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
Supported: replaces, timer.
Content-Length: 0.
X-Asterisk-HangupCause: User busy.
X-Asterisk-HangupCauseCode: 17.
.

#
U 78.105.1.129:5060 -> 78.105.1.129:5060
ACK sip:enum-test@sip.nemox.net:0 SIP/2.0.
Via: SIP/2.0/UDP 78.105.1.129:5060;branch=z9hG4bK0fa528b1;rport.
Max-Forwards: 70.
From: "John Smith" <sip:448447041774@78.105.1.129>;tag=as7afab3ac.
To: <sip:enum-test@sip.nemox.net:0>;tag=as7afab3ac.
Contact: <sip:448447041774@78.105.1.129>.
Call-ID: 6c0e90183995b2ef6c88000a78e13337@78.105.1.129.
CSeq: 102 ACK.
User-Agent: Asterisk PBX SVN-branch-1.6.1-r162896.
Content-Length: 0.
.

#
U 78.105.1.129:5060 -> 78.105.1.128:5060
SIP/2.0 603 Declined.
Via: SIP/2.0/UDP 78.105.1.128;branch=z9hG4bKf39d.08c55da7.0;received=78.105.1.128.
Via: SIP/2.0/UDP 78.105.1.131:5061;rport=5061;branch=z9hG4bKitxpbtxl.
From: "10000" <sip:10000@dev-sip.tele500.com>;tag=kmnzu.
To: <sip:0043780004711@dev-sip.tele500.com>;tag=as16160d47.
Call-ID: sqxpicqwiduhiui@78.105.1.131.
CSeq: 908 INVITE.
Server: Asterisk PBX SVN-branch-1.6.1-r162896.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
Supported: replaces, timer.
Contact: <sip:43780004711@78.105.1.129>.
Content-Length: 0.
.

#
U 78.105.1.128:5060 -> 78.105.1.129:5060
ACK sip:43780004711@dev-sip.tele500.com SIP/2.0.
Via: SIP/2.0/UDP 78.105.1.128;branch=z9hG4bKf39d.08c55da7.0.
From: "10000" <sip:10000@dev-sip.tele500.com>;tag=kmnzu.
Call-ID: sqxpicqwiduhiui@78.105.1.131.
To: <sip:0043780004711@dev-sip.tele500.com>;tag=as16160d47.
CSeq: 908 ACK.
Max-Forwards: 70.
User-Agent: OpenSIPS (1.4.1-notls (i386/linux)).
Content-Length: 0.
.