ngrep debug in k2 server : k1 <---->  k2

U xxx.xxx.xxx.xxx(k1):5002 -> xxx.xxx.xxx.xxx(k2):5003
INVITE sip:5001005@xxx.xxx.xxx.xxx(k2):5003 SIP/2.0.
Record-Route: <sip:xxx.xxx.xxx.xxx(k1):5002;lr=on;nat=yes;did=763.7861>.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k1):5002;branch=z9hG4bKe93a.851a9236.0.
Via: SIP/2.0/UDP 100.65.104.101:60496;received=122.116.37.55;branch=z9hG4bK-d8754z-8800d531eb69491a-1---d8754z-;rport=60496.
Max-Forwards: 69.
Contact: <sip:5978003@122.116.37.55:60496;transport=udp>.
To: "5001005"<sip:5001005@xxx.xxx.xxx.xxx(k2):5003>.
From: "5978003"<sip:5978003@xxx.xxx.xxx.xxx(k1):5002>;tag=1944d063.
Call-ID: NWI3MDllMTI1YmM1MjQ1MDM4ZGVlMmIyZDBiN2Q3ZjI..
CSeq: 1 INVITE.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO.
Content-Type: application/sdp.
User-Agent: eyeBeam release 1100z stamp 47739.
Content-Length: 312.
P-hint: forward branch.
.
v=0.
o=- 5 2 IN IP4 100.65.104.101.
s=CounterPath eyeBeam 1.5.
c=IN IP4 xxx.xxx.xxx.xxx(k2).
t=0 0.
m=audio 35462 RTP/AVP 98 18 3 101.
a=fmtp:18 annexb=yes.
a=fmtp:101 0-15.
a=rtpmap:98 iLBC/8000.
a=rtpmap:18 G729/8000.
a=rtpmap:101 telephone-event/8000.
a=sendrecv.
a=x-rtp-session-id:A27021BC28EB48E8BAF43C5BE6389874.

#
U xxx.xxx.xxx.xxx(k2):5003 -> xxx.xxx.xxx.xxx(k1):5002
SIP/2.0 100 trying -- your call is important to us.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k1):5002;branch=z9hG4bKe93a.851a9236.0.
Via: SIP/2.0/UDP 100.65.104.101:60496;received=122.116.37.55;branch=z9hG4bK-d8754z-8800d531eb69491a-1---d8754z-;rport=60496.
To: "5001005"<sip:5001005@xxx.xxx.xxx.xxx(k2):5003>.
From: "5978003"<sip:5978003@xxx.xxx.xxx.xxx(k1):5002>;tag=1944d063.
Call-ID: NWI3MDllMTI1YmM1MjQ1MDM4ZGVlMmIyZDBiN2Q3ZjI..
CSeq: 1 INVITE.
Server: SIP Server.
Content-Length: 0.
.

#
U xxx.xxx.xxx.xxx(k2):5003 -> 122.116.37.55:35890
INVITE sip:5001005@122.116.37.55:35890;ob SIP/2.0.
Record-Route: <sip:xxx.xxx.xxx.xxx(k2):5003;lr=on;did=763.941>.
Record-Route: <sip:xxx.xxx.xxx.xxx(k1):5002;lr=on;nat=yes;did=763.7861>.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k2):5003;branch=z9hG4bKe93a.359d0da4.0.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k1):5002;branch=z9hG4bKe93a.851a9236.0.
Via: SIP/2.0/UDP 100.65.104.101:60496;received=122.116.37.55;branch=z9hG4bK-d8754z-8800d531eb69491a-1---d8754z-;rport=60496.
Max-Forwards: 68.
Contact: <sip:5978003@122.116.37.55:60496;transport=udp>.
To: "5001005"<sip:5001005@xxx.xxx.xxx.xxx(k2):5003>.
From: "5978003"<sip:5978003@xxx.xxx.xxx.xxx(k1):5002>;tag=1944d063.
Call-ID: NWI3MDllMTI1YmM1MjQ1MDM4ZGVlMmIyZDBiN2Q3ZjI..
CSeq: 1 INVITE.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO.
Content-Type: application/sdp.
User-Agent: eyeBeam release 1100z stamp 47739.
Content-Length: 312.
.
v=0.
o=- 5 2 IN IP4 100.65.104.101.
s=CounterPath eyeBeam 1.5.
c=IN IP4 xxx.xxx.xxx.xxx(k2).
t=0 0.
m=audio 35462 RTP/AVP 98 18 3 101.
a=fmtp:18 annexb=yes.
a=fmtp:101 0-15.
a=rtpmap:98 iLBC/8000.
a=rtpmap:18 G729/8000.
a=rtpmap:101 telephone-event/8000.
a=sendrecv.
a=x-rtp-session-id:A27021BC28EB48E8BAF43C5BE6389874.

#
U 122.116.37.55:35890 -> xxx.xxx.xxx.xxx(k2):5003
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k2):5003;received=xxx.xxx.xxx.xxx(k2);branch=z9hG4bKe93a.359d0da4.0.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k1):5002;branch=z9hG4bKe93a.851a9236.0.
Via: SIP/2.0/UDP 100.65.104.101:60496;rport=60496;received=122.116.37.55;branch=z9hG4bK-d8754z-8800d531eb69491a-1---d8754z-.
Record-Route: <sip:xxx.xxx.xxx.xxx(k2):5003;lr;did=763.941>.
Record-Route: <sip:xxx.xxx.xxx.xxx(k1):5002;lr;nat=yes;did=763.7861>.
Call-ID: NWI3MDllMTI1YmM1MjQ1MDM4ZGVlMmIyZDBiN2Q3ZjI..
From: "5978003" <sip:5978003@xxx.xxx.xxx.xxx(k1)>;tag=1944d063.
To: "5001005" <sip:5001005@xxx.xxx.xxx.xxx(k2)>.
CSeq: 1 INVITE.
Content-Length:  0.
.

#
U 122.116.37.55:35890 -> xxx.xxx.xxx.xxx(k2):5003
SIP/2.0 180 Ringing.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k2):5003;received=xxx.xxx.xxx.xxx(k2);branch=z9hG4bKe93a.359d0da4.0.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k1):5002;branch=z9hG4bKe93a.851a9236.0.
Via: SIP/2.0/UDP 100.65.104.101:60496;rport=60496;received=122.116.37.55;branch=z9hG4bK-d8754z-8800d531eb69491a-1---d8754z-.
Record-Route: <sip:xxx.xxx.xxx.xxx(k2):5003;lr;did=763.941>.
Record-Route: <sip:xxx.xxx.xxx.xxx(k1):5002;lr;nat=yes;did=763.7861>.
Call-ID: NWI3MDllMTI1YmM1MjQ1MDM4ZGVlMmIyZDBiN2Q3ZjI..
From: "5978003" <sip:5978003@xxx.xxx.xxx.xxx(k1)>;tag=1944d063.
To: "5001005" <sip:5001005@xxx.xxx.xxx.xxx(k2)>;tag=cjLZLUdZz5lKpi1gtGak.otJWQzet.vf.
CSeq: 1 INVITE.
Contact: "5001005" <sip:5001005@122.116.37.55:35890;ob>.
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS.
Content-Length:  0.
.

#
U xxx.xxx.xxx.xxx(k2):5003 -> xxx.xxx.xxx.xxx(k1):5002
SIP/2.0 180 Ringing.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k1):5002;branch=z9hG4bKe93a.851a9236.0.
Via: SIP/2.0/UDP 100.65.104.101:60496;rport=60496;received=122.116.37.55;branch=z9hG4bK-d8754z-8800d531eb69491a-1---d8754z-.
Record-Route: <sip:xxx.xxx.xxx.xxx(k2):5003;lr;did=763.941>.
Record-Route: <sip:xxx.xxx.xxx.xxx(k1):5002;lr;nat=yes;did=763.7861>.
Call-ID: NWI3MDllMTI1YmM1MjQ1MDM4ZGVlMmIyZDBiN2Q3ZjI..
From: "5978003" <sip:5978003@xxx.xxx.xxx.xxx(k1)>;tag=1944d063.
To: "5001005" <sip:5001005@xxx.xxx.xxx.xxx(k2)>;tag=cjLZLUdZz5lKpi1gtGak.otJWQzet.vf.
CSeq: 1 INVITE.
Contact: "5001005" <sip:5001005@122.116.37.55:35890;ob>.
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS.
Content-Length:  0.
.

#
U 122.116.37.55:35890 -> xxx.xxx.xxx.xxx(k2):5003
SIP/2.0 200 OK.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k2):5003;received=xxx.xxx.xxx.xxx(k2);branch=z9hG4bKe93a.359d0da4.0.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k1):5002;branch=z9hG4bKe93a.851a9236.0.
Via: SIP/2.0/UDP 100.65.104.101:60496;rport=60496;received=122.116.37.55;branch=z9hG4bK-d8754z-8800d531eb69491a-1---d8754z-.
Record-Route: <sip:xxx.xxx.xxx.xxx(k2):5003;lr;did=763.941>.
Record-Route: <sip:xxx.xxx.xxx.xxx(k1):5002;lr;nat=yes;did=763.7861>.
Call-ID: NWI3MDllMTI1YmM1MjQ1MDM4ZGVlMmIyZDBiN2Q3ZjI..
From: "5978003" <sip:5978003@xxx.xxx.xxx.xxx(k1)>;tag=1944d063.
To: "5001005" <sip:5001005@xxx.xxx.xxx.xxx(k2)>;tag=cjLZLUdZz5lKpi1gtGak.otJWQzet.vf.
CSeq: 1 INVITE.
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS.
Contact: "5001005" <sip:5001005@122.116.37.55:35890;ob>.
Supported: replaces, 100rel, timer, norefersub.
Content-Type: application/sdp.
Content-Length:   230.
.
v=0.
o=- 3595766102 3595766103 IN IP4 122.116.37.55.
s=cpc_med.
c=IN IP4 122.116.37.55.
t=0 0.
m=audio 4008 RTP/AVP 98 101.
a=sendrecv.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=rtpmap:98 iLBC/8000.
a=fmtp:98 mode=20.

#
U xxx.xxx.xxx.xxx(k2):5003 -> xxx.xxx.xxx.xxx(k1):5002
SIP/2.0 200 OK.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k1):5002;branch=z9hG4bKe93a.851a9236.0.
Via: SIP/2.0/UDP 100.65.104.101:60496;rport=60496;received=122.116.37.55;branch=z9hG4bK-d8754z-8800d531eb69491a-1---d8754z-.
Record-Route: <sip:xxx.xxx.xxx.xxx(k2):5003;lr;did=763.941>.
Record-Route: <sip:xxx.xxx.xxx.xxx(k1):5002;lr;nat=yes;did=763.7861>.
Call-ID: NWI3MDllMTI1YmM1MjQ1MDM4ZGVlMmIyZDBiN2Q3ZjI..
From: "5978003" <sip:5978003@xxx.xxx.xxx.xxx(k1)>;tag=1944d063.
To: "5001005" <sip:5001005@xxx.xxx.xxx.xxx(k2)>;tag=cjLZLUdZz5lKpi1gtGak.otJWQzet.vf.
CSeq: 1 INVITE.
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS.
Contact: "5001005" <sip:5001005@122.116.37.55:35890;ob>.
Supported: replaces, 100rel, timer, norefersub.
Content-Type: application/sdp.
Content-Length:   230.
.
v=0.
o=- 3595766102 3595766103 IN IP4 122.116.37.55.
s=cpc_med.
c=IN IP4 122.116.37.55.
t=0 0.
m=audio 4008 RTP/AVP 98 101.
a=sendrecv.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=rtpmap:98 iLBC/8000.
a=fmtp:98 mode=20.

#
U xxx.xxx.xxx.xxx(k1):5002 -> xxx.xxx.xxx.xxx(k2):5003
ACK sip:5001005@xxx.xxx.xxx.xxx(k2):5003;ob SIP/2.0.
Record-Route: <sip:xxx.xxx.xxx.xxx(k1):5002;lr=on>.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k1):5002;branch=z9hG4bKcydzigwkX.
Via: SIP/2.0/UDP 100.65.104.101:60496;received=122.116.37.55;branch=z9hG4bK-d8754z-5479c6361610102b-1---d8754z-;rport=60496.
Max-Forwards: 69.
Route: <sip:xxx.xxx.xxx.xxx(k2):5003;lr;did=763.941>.
Contact: <sip:5978003@122.116.37.55:60496;transport=udp>.
To: "5001005"<sip:5001005@xxx.xxx.xxx.xxx(k2)>;tag=cjLZLUdZz5lKpi1gtGak.otJWQzet.vf.
From: "5978003"<sip:5978003@xxx.xxx.xxx.xxx(k1)>;tag=1944d063.
Call-ID: NWI3MDllMTI1YmM1MjQ1MDM4ZGVlMmIyZDBiN2Q3ZjI..
CSeq: 1 ACK.
User-Agent: eyeBeam release 1100z stamp 47739.
Content-Length: 0.
.

#
U 122.116.37.55:35890 -> xxx.xxx.xxx.xxx(k2):5003
SIP/2.0 200 OK.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k2):5003;received=xxx.xxx.xxx.xxx(k2);branch=z9hG4bKe93a.359d0da4.0.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k1):5002;branch=z9hG4bKe93a.851a9236.0.
Via: SIP/2.0/UDP 100.65.104.101:60496;rport=60496;received=122.116.37.55;branch=z9hG4bK-d8754z-8800d531eb69491a-1---d8754z-.
Record-Route: <sip:xxx.xxx.xxx.xxx(k2):5003;lr;did=763.941>.
Record-Route: <sip:xxx.xxx.xxx.xxx(k1):5002;lr;nat=yes;did=763.7861>.
Call-ID: NWI3MDllMTI1YmM1MjQ1MDM4ZGVlMmIyZDBiN2Q3ZjI..
From: "5978003" <sip:5978003@xxx.xxx.xxx.xxx(k1)>;tag=1944d063.
To: "5001005" <sip:5001005@xxx.xxx.xxx.xxx(k2)>;tag=cjLZLUdZz5lKpi1gtGak.otJWQzet.vf.
CSeq: 1 INVITE.
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS.
Contact: "5001005" <sip:5001005@122.116.37.55:35890;ob>.
Supported: replaces, 100rel, timer, norefersub.
Content-Type: application/sdp.
Content-Length:   230.
.
v=0.
o=- 3595766102 3595766103 IN IP4 122.116.37.55.
s=cpc_med.
c=IN IP4 122.116.37.55.
t=0 0.
m=audio 4008 RTP/AVP 98 101.
a=sendrecv.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=rtpmap:98 iLBC/8000.
a=fmtp:98 mode=20.

#
U xxx.xxx.xxx.xxx(k2):5003 -> xxx.xxx.xxx.xxx(k1):5002
SIP/2.0 200 OK.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k1):5002;branch=z9hG4bKe93a.851a9236.0.
Via: SIP/2.0/UDP 100.65.104.101:60496;rport=60496;received=122.116.37.55;branch=z9hG4bK-d8754z-8800d531eb69491a-1---d8754z-.
Record-Route: <sip:xxx.xxx.xxx.xxx(k2):5003;lr;did=763.941>.
Record-Route: <sip:xxx.xxx.xxx.xxx(k1):5002;lr;nat=yes;did=763.7861>.
Call-ID: NWI3MDllMTI1YmM1MjQ1MDM4ZGVlMmIyZDBiN2Q3ZjI..
From: "5978003" <sip:5978003@xxx.xxx.xxx.xxx(k1)>;tag=1944d063.
To: "5001005" <sip:5001005@xxx.xxx.xxx.xxx(k2)>;tag=cjLZLUdZz5lKpi1gtGak.otJWQzet.vf.
CSeq: 1 INVITE.
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS.
Contact: "5001005" <sip:5001005@122.116.37.55:35890;ob>.
Supported: replaces, 100rel, timer, norefersub.
Content-Type: application/sdp.
Content-Length:   230.
.
v=0.
o=- 3595766102 3595766103 IN IP4 122.116.37.55.
s=cpc_med.
c=IN IP4 122.116.37.55.
t=0 0.
m=audio 4008 RTP/AVP 98 101.
a=sendrecv.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=rtpmap:98 iLBC/8000.
a=fmtp:98 mode=20.

#
U xxx.xxx.xxx.xxx(k1):5002 -> xxx.xxx.xxx.xxx(k2):5003
ACK sip:5001005@xxx.xxx.xxx.xxx(k2):5003;ob SIP/2.0.
Record-Route: <sip:xxx.xxx.xxx.xxx(k1):5002;lr=on>.
Via: SIP/2.0/UDP xxx.xxx.xxx.xxx(k1):5002;branch=z9hG4bKcydzigwkX.
Via: SIP/2.0/UDP 100.65.104.101:60496;received=122.116.37.55;branch=z9hG4bK-d8754z-5479c6361610102b-1---d8754z-;rport=60496.
Max-Forwards: 69.
Route: <sip:xxx.xxx.xxx.xxx(k2):5003;lr;did=763.941>.
Contact: <sip:5978003@122.116.37.55:60496;transport=udp>.
To: "5001005"<sip:5001005@xxx.xxx.xxx.xxx(k2)>;tag=cjLZLUdZz5lKpi1gtGak.otJWQzet.vf.
From: "5978003"<sip:5978003@xxx.xxx.xxx.xxx(k1)>;tag=1944d063.
Call-ID: NWI3MDllMTI1YmM1MjQ1MDM4ZGVlMmIyZDBiN2Q3ZjI..
CSeq: 1 ACK.
User-Agent: eyeBeam release 1100z stamp 47739.
Content-Length: 0.
.