[Kamailio-Users-ES] Fallo al transferir llamadas externas - sr-users-es

24 Sep 2008


      Hola.
Tengo una instalación con FXO Grandstream y Openser con varios teléfonos 
IP registrados, y el problema que tengo es que las llamadas que entran a 
través del FXO, al transferirlas entre teléfonos IP se cortan. No se 
pueden transferir llamadas externas entre teléfonos IP. Sin embargo con 
las llamadas internas entre los propios teléfonos IP no hay ningún 
problema para transferirlas. Este problema ha surgido a raíz de cambiar 
el modo de funcionamiento del FXO para que las llamadas entrantes suenen 
directamente en los teléfonos IP. Con la configuración anterior según la 
cual cuando entraba la llamada en el FXO era necesario una segunda 
marcación para seleccionar la extensión IP, la transferencia de llamadas 
funcionaba correctamente.
¿Me puede por favor echar alguien una mano a identificar la causa del 
corte en las transferencias? Muchas gracias de antemano.
Adjunto traza ngrep, de una llamada externa entrante a la extensión 43 a 
través del canal FXO 9873, y el intento de transferencia de esta llamada 
desde la extensión 43 hacia la extensión 42. La traza a partir de 
haberse atendido ya la llamada externa en la extensión 42.
#
U 2008/09/19 14:30:19.983100 192.168.20.13:5060 -> 192.168.20.1:5060
INVITE sip:42@192.168.20.1:5060 SIP/2.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK26887157682213617086;rport
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 INVITE
Contact: sip:43@192.168.20.13:5060
Max-Forwards: 70
Supported: replaces
User-Agent: Voip Phone 1.0
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, 
SUBSCRIBE, PRACK, UPDATE
Content-Type: application/sdp
Content-Length: 313
v=0
o=43 32364100 22806179 IN IP4 192.168.20.13
s=A conversation
c=IN IP4 192.168.20.13
t=0 0
m=audio 10320 RTP/AVP 8 4 18 0 9 101
a=rtpmap:8 PCMA/8000
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:9 G722/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
#
U 2008/09/19 14:30:19.984128 192.168.20.1:5060 -> 192.168.20.13:5060
SIP/2.0 100 trying -- your call is important to us
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK26887157682213617086;rport=5060
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 INVITE
Server: OpenSer (1.1.1-notls (i386/linux))
Content-Length: 0
Warning: 392 192.168.20.1:5060 "Noisy feedback tells:  pid=1627 
req_src_ip=192.168.20.13 req_src_port=5060 
in_uri=sip:42@192.168.20.1:5060 out_uri=sip:42@192.168.20.12:5060 
via_cnt==1"
#
U 2008/09/19 14:30:19.984308 192.168.20.1:5060 -> 192.168.20.12:5060
INVITE sip:42@192.168.20.12:5060 SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKb676.d21cd317.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK26887157682213617086;rport=5060
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 INVITE
Contact: sip:43@192.168.20.13:5060
Max-Forwards: 69
Supported: replaces
User-Agent: Voip Phone 1.0
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, 
SUBSCRIBE, PRACK, UPDATE
Content-Type: application/sdp
Content-Length: 313
P-hint: usrloc applied
v=0
o=43 32364100 22806179 IN IP4 192.168.20.13
s=A conversation
c=IN IP4 192.168.20.13
t=0 0
m=audio 10320 RTP/AVP 8 4 18 0 9 101
a=rtpmap:8 PCMA/8000
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:9 G722/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
#
U 2008/09/19 14:30:20.202511 192.168.20.1:5060 -> 192.168.20.12:5060
INVITE sip:42@192.168.20.12:5060 SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKb676.d21cd317.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK26887157682213617086;rport=5060
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 INVITE
Contact: sip:43@192.168.20.13:5060
Max-Forwards: 69
Supported: replaces
User-Agent: Voip Phone 1.0
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, 
SUBSCRIBE, PRACK, UPDATE
Content-Type: application/sdp
Content-Length: 313
P-hint: usrloc applied
v=0
o=43 32364100 22806179 IN IP4 192.168.20.13
s=A conversation
c=IN IP4 192.168.20.13
t=0 0
m=audio 10320 RTP/AVP 8 4 18 0 9 101
a=rtpmap:8 PCMA/8000
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:9 G722/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
#
U 2008/09/19 14:30:20.205681 192.168.20.12:5060 -> 192.168.20.1:5060
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKb676.d21cd317.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK26887157682213617086;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 INVITE
Content-Length: 0
#
U 2008/09/19 14:30:20.226804 192.168.20.12:5060 -> 192.168.20.1:5060
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKb676.d21cd317.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK26887157682213617086;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 INVITE
Contact: sip:42@192.168.20.12:5060
Content-Length: 0
#
U 2008/09/19 14:30:20.227247 192.168.20.1:5060 -> 192.168.20.13:5060
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK26887157682213617086;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 INVITE
Contact: sip:42@192.168.20.12:5060
Content-Length: 0
#
U 2008/09/19 14:30:20.298327 192.168.20.12:5060 -> 192.168.20.1:5060
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKb676.d21cd317.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK26887157682213617086;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 INVITE
Contact: sip:42@192.168.20.12:5060
Content-Length: 0
#
U 2008/09/19 14:30:20.299019 192.168.20.1:5060 -> 192.168.20.13:5060
SIP/2.0 180 Ringing
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK26887157682213617086;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 INVITE
Contact: sip:42@192.168.20.12:5060
Content-Length: 0
#
U 2008/09/19 14:30:23.142771 192.168.20.12:5060 -> 192.168.20.1:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKb676.d21cd317.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK26887157682213617086;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 INVITE
Contact: sip:42@192.168.20.12:5060
Supported: replaces
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, PRACK, 
UPDATE, MESSAGE
Content-Type: application/sdp
Content-Length: 334
v=0
o=42 13188124 91532501 IN IP4 192.168.20.12
s=A conversation
c=IN IP4 192.168.20.12
t=0 0
m=audio 10176 RTP/AVP 8 4 18 0 9 101
a=rtpmap:8 PCMA/8000
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:0 PCMU/8000
a=rtpmap:9 G722/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
#
U 2008/09/19 14:30:23.143540 192.168.20.1:5060 -> 192.168.20.13:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK26887157682213617086;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 INVITE
Contact: sip:42@192.168.20.12:5060
Supported: replaces
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, PRACK, 
UPDATE, MESSAGE
Content-Type: application/sdp
Content-Length: 334
v=0
o=42 13188124 91532501 IN IP4 192.168.20.12
s=A conversation
c=IN IP4 192.168.20.12
t=0 0
m=audio 10176 RTP/AVP 8 4 18 0 9 101
a=rtpmap:8 PCMA/8000
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:0 PCMU/8000
a=rtpmap:9 G722/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
#
U 2008/09/19 14:30:23.612392 192.168.20.13:5060 -> 192.168.20.1:5060
ACK sip:42@192.168.20.12:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.20.13:5060;branch=z9hG4bK2420243251744332345
Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 ACK
Contact: sip:43@192.168.20.13:5060
Max-Forwards: 70
User-Agent: Voip Phone 1.0
Content-Length: 0
#
U 2008/09/19 14:30:23.613303 192.168.20.1:5060 -> 192.168.20.12:5060
ACK sip:42@192.168.20.12:5060 SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKb676.d21cd317.2
Via: SIP/2.0/UDP 192.168.20.13:5060;branch=z9hG4bK2420243251744332345
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 ACK
Contact: sip:43@192.168.20.13:5060
Max-Forwards: 69
User-Agent: Voip Phone 1.0
Content-Length: 0
P-hint: rr-enforced
#
U 2008/09/19 14:30:27.150694 192.168.20.13:5060 -> 192.168.20.1:5060
INVITE sip:42@192.168.20.12:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.20.13:5060;branch=z9hG4bK2273717731513410102;rport
Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 2 INVITE
Contact: sip:43@192.168.20.13:5060
Max-Forwards: 70
Supported: replaces
User-Agent: Voip Phone 1.0
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, 
SUBSCRIBE, PRACK, UPDATE
Content-Type: application/sdp
Content-Length: 307
v=0
o=43 32364100 22806180 IN IP4 192.168.20.13
s=A conversation
c=IN IP4 0.0.0.0
t=0 0
m=audio 10320 RTP/AVP 8 4 18 0 9 101
a=rtpmap:8 PCMA/8000
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:9 G722/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendonly
#
U 2008/09/19 14:30:27.151252 192.168.20.1:5060 -> 192.168.20.13:5060
SIP/2.0 100 trying -- your call is important to us
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK2273717731513410102;rport=5060
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 2 INVITE
Server: OpenSer (1.1.1-notls (i386/linux))
Content-Length: 0
Warning: 392 192.168.20.1:5060 "Noisy feedback tells:  pid=1628 
req_src_ip=192.168.20.13 req_src_port=5060 
in_uri=sip:42@192.168.20.12:5060 out_uri=sip:42@192.168.20.12:5060 
via_cnt==1"
#
U 2008/09/19 14:30:27.151423 192.168.20.1:5060 -> 192.168.20.12:5060
INVITE sip:42@192.168.20.12:5060 SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK8676.852fdee7.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK2273717731513410102;rport=5060
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 2 INVITE
Contact: sip:43@192.168.20.13:5060
Max-Forwards: 69
Supported: replaces
User-Agent: Voip Phone 1.0
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, 
SUBSCRIBE, PRACK, UPDATE
Content-Type: application/sdp
Content-Length: 307
P-hint: rr-enforced
v=0
o=43 32364100 22806180 IN IP4 192.168.20.13
s=A conversation
c=IN IP4 0.0.0.0
t=0 0
m=audio 10320 RTP/AVP 8 4 18 0 9 101
a=rtpmap:8 PCMA/8000
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:9 G722/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendonly
#
U 2008/09/19 14:30:27.209761 192.168.20.1:5060 -> 192.168.20.12:5060
INVITE sip:42@192.168.20.12:5060 SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK8676.852fdee7.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK2273717731513410102;rport=5060
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 2 INVITE
Contact: sip:43@192.168.20.13:5060
Max-Forwards: 69
Supported: replaces
User-Agent: Voip Phone 1.0
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, 
SUBSCRIBE, PRACK, UPDATE
Content-Type: application/sdp
Content-Length: 307
P-hint: rr-enforced
v=0
o=43 32364100 22806180 IN IP4 192.168.20.13
s=A conversation
c=IN IP4 0.0.0.0
t=0 0
m=audio 10320 RTP/AVP 8 4 18 0 9 101
a=rtpmap:8 PCMA/8000
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:9 G722/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendonly
#
U 2008/09/19 14:30:27.406839 192.168.20.12:5060 -> 192.168.20.1:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK8676.852fdee7.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK2273717731513410102;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 2 INVITE
Contact: sip:42@192.168.20.12:5060
Supported: replaces
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, PRACK, 
UPDATE, MESSAGE
Content-Type: application/sdp
Content-Length: 334
v=0
o=42 22322225 14523311 IN IP4 192.168.20.12
s=A conversation
c=IN IP4 192.168.20.12
t=0 0
m=audio 10176 RTP/AVP 8 4 18 0 9 101
a=rtpmap:8 PCMA/8000
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:0 PCMU/8000
a=rtpmap:9 G722/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=recvonly
#
U 2008/09/19 14:30:27.407193 192.168.20.1:5060 -> 192.168.20.13:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK2273717731513410102;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 2 INVITE
Contact: sip:42@192.168.20.12:5060
Supported: replaces
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, PRACK, 
UPDATE, MESSAGE
Content-Type: application/sdp
Content-Length: 334
v=0
o=42 22322225 14523311 IN IP4 192.168.20.12
s=A conversation
c=IN IP4 192.168.20.12
t=0 0
m=audio 10176 RTP/AVP 8 4 18 0 9 101
a=rtpmap:8 PCMA/8000
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:0 PCMU/8000
a=rtpmap:9 G722/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=recvonly
#
U 2008/09/19 14:30:27.491887 192.168.20.12:5060 -> 192.168.20.1:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK8676.852fdee7.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK2273717731513410102;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 2 INVITE
Contact: sip:42@192.168.20.12:5060
Supported: replaces
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, PRACK, 
UPDATE, MESSAGE
Content-Type: application/sdp
Content-Length: 334
v=0
o=42 22322225 14523311 IN IP4 192.168.20.12
s=A conversation
c=IN IP4 192.168.20.12
t=0 0
m=audio 10176 RTP/AVP 8 4 18 0 9 101
a=rtpmap:8 PCMA/8000
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:0 PCMU/8000
a=rtpmap:9 G722/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=recvonly
#
U 2008/09/19 14:30:27.492279 192.168.20.1:5060 -> 192.168.20.13:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK2273717731513410102;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 2 INVITE
Contact: sip:42@192.168.20.12:5060
Supported: replaces
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, PRACK, 
UPDATE, MESSAGE
Content-Type: application/sdp
Content-Length: 334
v=0
o=42 22322225 14523311 IN IP4 192.168.20.12
s=A conversation
c=IN IP4 192.168.20.12
t=0 0
m=audio 10176 RTP/AVP 8 4 18 0 9 101
a=rtpmap:8 PCMA/8000
a=rtpmap:4 G723/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:0 PCMU/8000
a=rtpmap:9 G722/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=recvonly
#
U 2008/09/19 14:30:27.539823 192.168.20.13:5060 -> 192.168.20.1:5060
ACK sip:42@192.168.20.12:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.20.13:5060;branch=z9hG4bK392818939904813707
Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 2 ACK
Contact: sip:43@192.168.20.13:5060
Max-Forwards: 70
User-Agent: Voip Phone 1.0
Content-Length: 0
#
U 2008/09/19 14:30:27.540247 192.168.20.1:5060 -> 192.168.20.12:5060
ACK sip:42@192.168.20.12:5060 SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK8676.852fdee7.2
Via: SIP/2.0/UDP 192.168.20.13:5060;branch=z9hG4bK392818939904813707
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 2 ACK
Contact: sip:43@192.168.20.13:5060
Max-Forwards: 69
User-Agent: Voip Phone 1.0
Content-Length: 0
P-hint: rr-enforced
#
U 2008/09/19 14:30:27.709861 192.168.20.13:5060 -> 192.168.20.1:5060
ACK sip:42@192.168.20.12:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.20.13:5060;branch=z9hG4bK392818939904813707
Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 2 ACK
Contact: sip:43@192.168.20.13:5060
Max-Forwards: 70
User-Agent: Voip Phone 1.0
Content-Length: 0
#
U 2008/09/19 14:30:27.710267 192.168.20.1:5060 -> 192.168.20.12:5060
ACK sip:42@192.168.20.12:5060 SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=1176531356
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK8676.852fdee7.2
Via: SIP/2.0/UDP 192.168.20.13:5060;branch=z9hG4bK392818939904813707
From: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
To: 42 sip:42@192.168.20.1:5060;tag=3026415234
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 2 ACK
Contact: sip:43@192.168.20.13:5060
Max-Forwards: 69
User-Agent: Voip Phone 1.0
Content-Length: 0
P-hint: rr-enforced
#
U 2008/09/19 14:30:27.762162 192.168.20.13:5060 -> 192.168.20.1:5060
REFER sip:9873@192.168.10.2:5066;user=phone SIP/2.0
Via: SIP/2.0/UDP 192.168.20.13:5060;branch=z9hG4bK183391788069093717;rport
Route: sip:192.168.20.1;lr=on;ftag=2478014423
From: sip:43@192.168.20.1;tag=2478014423
To: unknown sip:unknown@192.168.20.1;tag=3d05668484314852
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 2 REFER
Contact: sip:43@192.168.20.13:5060
refer-to: 
sip:42@192.168.20.1:5060?Replaces=66593269826955-13455355112414%40192.168.20.13%3Bto-tag%3D3026415234%3Bfrom-tag%3D1176531356
referred-by: sip:43@192.168.20.1
Max-Forwards: 70
User-Agent: Voip Phone 1.0
Event: refer
Content-Length: 0
#
U 2008/09/19 14:30:27.762693 192.168.20.1:5060 -> 192.168.10.2:5066
REFER sip:9873@192.168.10.2:5066;user=phone SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=2478014423
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK6263.9c369da.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK183391788069093717;rport=5060
From: sip:43@192.168.20.1;tag=2478014423
To: unknown sip:unknown@192.168.20.1;tag=3d05668484314852
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 2 REFER
Contact: sip:43@192.168.20.13:5060
refer-to: 
sip:42@192.168.20.1:5060?Replaces=66593269826955-13455355112414%40192.168.20.13%3Bto-tag%3D3026415234%3Bfrom-tag%3D1176531356
referred-by: sip:43@192.168.20.1
Max-Forwards: 69
User-Agent: Voip Phone 1.0
Event: refer
Content-Length: 0
P-hint: rr-enforced
#
U 2008/09/19 14:30:27.859294 192.168.10.2:5066 -> 192.168.20.1:5060
SIP/2.0 202 Accepted
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK6263.9c369da.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK183391788069093717;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=2478014423
From: sip:43@192.168.20.1;tag=2478014423
To: unknown sip:unknown@192.168.20.1;tag=3d05668484314852
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 2 REFER
User-Agent: Grandstream GXW4108 (HW 0001, Ch:6) 1.0.1.2
Contact: sip:9873@192.168.10.2:5066;user=phone
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Supported: replaces, timer, 100rel, path
Content-Length: 0
#
U 2008/09/19 14:30:27.859610 192.168.20.1:5060 -> 192.168.20.13:5060
SIP/2.0 202 Accepted
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK183391788069093717;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=2478014423
From: sip:43@192.168.20.1;tag=2478014423
To: unknown sip:unknown@192.168.20.1;tag=3d05668484314852
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 2 REFER
User-Agent: Grandstream GXW4108 (HW 0001, Ch:6) 1.0.1.2
Contact: sip:9873@192.168.10.2:5066;user=phone
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Supported: replaces, timer, 100rel, path
Content-Length: 0
#
U 2008/09/19 14:30:27.880527 192.168.10.2:5066 -> 192.168.20.1:5060
NOTIFY sip:43@192.168.20.13:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK18161fe54437b433
Route: sip:192.168.20.1;lr=on;ftag=3d05668484314852
From: "unknown"sip:unknown@192.168.20.1;tag=3d05668484314852
To: sip:43@192.168.20.1;tag=2478014423
Contact: sip:9873@192.168.10.2:5066;user=phone
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 10757 NOTIFY
User-Agent: Grandstream GXW4108 (HW 0001, Ch:6) 1.0.1.2
Max-Forwards: 70
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Event: refer
Subscription-State: active
Content-Type: message/sipfrag;version=2.0
Content-Length: 20
SIP/2.0 100 Trying
#
U 2008/09/19 14:30:27.881054 192.168.20.1:5060 -> 192.168.20.13:5060
NOTIFY sip:43@192.168.20.13:5060 SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=3d05668484314852
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKcd3.d84f00f3.0
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK18161fe54437b433
From: "unknown"sip:unknown@192.168.20.1;tag=3d05668484314852
To: sip:43@192.168.20.1;tag=2478014423
Contact: sip:9873@192.168.10.2:5066;user=phone
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 10757 NOTIFY
User-Agent: Grandstream GXW4108 (HW 0001, Ch:6) 1.0.1.2
Max-Forwards: 69
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Event: refer
Subscription-State: active
Content-Type: message/sipfrag;version=2.0
Content-Length: 20 
P-hint: rr-enforced
SIP/2.0 100 Trying
#
U 2008/09/19 14:30:27.912377 192.168.10.2:5066 -> 192.168.20.1:5060
INVITE sip:42@192.168.20.1:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK2b17d6e34a56abe6
From: "unknown"sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060
Contact: sip:9873@192.168.10.2:5066;user=phone
Replaces: 
66593269826955-13455355112414@192.168.20.13;to-tag=3026415234;from-tag=1176531356
Supported: replaces, timer, path
Referred-By: sip:43@192.168.20.1
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 INVITE
User-Agent: Grandstream GXW4108 (HW 0001, Ch:7) 1.0.1.2
Max-Forwards: 70
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Content-Type: application/sdp
Content-Length: 235
v=0
o=9873 8007 8000 IN IP4 192.168.10.2
s=SIP Call
c=IN IP4 192.168.10.2
t=0 0
m=audio 5032 RTP/AVP 8 0 101
a=sendrecv
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=ptime:10
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-11
#
U 2008/09/19 14:30:27.912889 192.168.20.1:5060 -> 192.168.10.2:5066
SIP/2.0 100 trying -- your call is important to us
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK2b17d6e34a56abe6
From: "unknown"sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 INVITE
Server: OpenSer (1.1.1-notls (i386/linux))
Content-Length: 0
Warning: 392 192.168.20.1:5060 "Noisy feedback tells:  pid=1626 
req_src_ip=192.168.10.2 req_src_port=5066 
in_uri=sip:42@192.168.20.1:5060 out_uri=sip:42@192.168.20.12:5060 
via_cnt==1"
#
U 2008/09/19 14:30:27.913010 192.168.20.1:5060 -> 192.168.20.12:5060
INVITE sip:42@192.168.20.12:5060 SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=10263706333383c3
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKed4e.8b482304.0
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK2b17d6e34a56abe6
From: "unknown"sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060
Contact: sip:9873@192.168.10.2:5066;user=phone
Replaces: 
66593269826955-13455355112414@192.168.20.13;to-tag=3026415234;from-tag=1176531356
Supported: replaces, timer, path
Referred-By: sip:43@192.168.20.1
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 INVITE
User-Agent: Grandstream GXW4108 (HW 0001, Ch:7) 1.0.1.2
Max-Forwards: 69
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Content-Type: application/sdp
Content-Length: 235
P-hint: usrloc applied
v=0
o=9873 8007 8000 IN IP4 192.168.10.2
s=SIP Call
c=IN IP4 192.168.10.2
t=0 0
m=audio 5032 RTP/AVP 8 0 101
a=sendrecv
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=ptime:10
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-11
#
U 2008/09/19 14:30:28.140252 192.168.20.13:5060 -> 192.168.20.1:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKcd3.d84f00f3.0
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK18161fe54437b433
Record-Route: sip:192.168.20.1;lr=on;ftag=3d05668484314852
From: unknown sip:unknown@192.168.20.1;tag=3d05668484314852
To: sip:43@192.168.20.1;tag=2478014423
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 10757 NOTIFY
Contact: sip:43@192.168.20.13:5060
Content-Length: 0
#
U 2008/09/19 14:30:28.140839 192.168.20.1:5060 -> 192.168.10.2:5066
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK18161fe54437b433
Record-Route: sip:192.168.20.1;lr=on;ftag=3d05668484314852
From: unknown sip:unknown@192.168.20.1;tag=3d05668484314852
To: sip:43@192.168.20.1;tag=2478014423
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 10757 NOTIFY
Contact: sip:43@192.168.20.13:5060
Content-Length: 0
#
U 2008/09/19 14:30:28.193697 192.168.20.13:5060 -> 192.168.20.1:5060
BYE sip:9873@192.168.10.2:5066;user=phone SIP/2.0
Via: SIP/2.0/UDP 192.168.20.13:5060;branch=z9hG4bK2144212896305094925;rport
Route: sip:192.168.20.1;lr=on;ftag=2478014423
From: sip:43@192.168.20.1;tag=2478014423
To: unknown sip:unknown@192.168.20.1;tag=3d05668484314852
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 3 BYE
Max-Forwards: 70
User-Agent: Voip Phone 1.0
Content-Length: 0
#
U 2008/09/19 14:30:28.194430 192.168.20.1:5060 -> 192.168.10.2:5066
BYE sip:9873@192.168.10.2:5066;user=phone SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=2478014423
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK7263.af092c33.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK2144212896305094925;rport=5060
From: sip:43@192.168.20.1;tag=2478014423
To: unknown sip:unknown@192.168.20.1;tag=3d05668484314852
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 3 BYE
Max-Forwards: 69
User-Agent: Voip Phone 1.0
Content-Length: 0
P-hint: rr-enforced
#
U 2008/09/19 14:30:28.210618 192.168.20.1:5060 -> 192.168.20.12:5060
INVITE sip:42@192.168.20.12:5060 SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=10263706333383c3
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKed4e.8b482304.0
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK2b17d6e34a56abe6
From: "unknown"sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060
Contact: sip:9873@192.168.10.2:5066;user=phone
Replaces: 
66593269826955-13455355112414@192.168.20.13;to-tag=3026415234;from-tag=1176531356
Supported: replaces, timer, path
Referred-By: sip:43@192.168.20.1
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 INVITE
User-Agent: Grandstream GXW4108 (HW 0001, Ch:7) 1.0.1.2
Max-Forwards: 69
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Content-Type: application/sdp
Content-Length: 235
P-hint: usrloc applied
v=0
o=9873 8007 8000 IN IP4 192.168.10.2
s=SIP Call
c=IN IP4 192.168.10.2
t=0 0
m=audio 5032 RTP/AVP 8 0 101
a=sendrecv
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=ptime:10
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-11
#
U 2008/09/19 14:30:28.211176 192.168.20.1:5060 -> 192.168.10.2:5066
BYE sip:9873@192.168.10.2:5066;user=phone SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=2478014423
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK7263.af092c33.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK2144212896305094925;rport=5060
From: sip:43@192.168.20.1;tag=2478014423
To: unknown sip:unknown@192.168.20.1;tag=3d05668484314852
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 3 BYE
Max-Forwards: 69
User-Agent: Voip Phone 1.0
Content-Length: 0
P-hint: rr-enforced
#
U 2008/09/19 14:30:28.286970 192.168.10.2:5066 -> 192.168.20.1:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK7263.af092c33.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK2144212896305094925;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=2478014423
From: sip:43@192.168.20.1;tag=2478014423
To: unknown sip:unknown@192.168.20.1;tag=3d05668484314852
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 3 BYE
User-Agent: Grandstream GXW4108 (HW 0001, Ch:6) 1.0.1.2
Contact: sip:9873@192.168.10.2:5066;user=phone
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Supported: replaces, timer, 100rel, path
Content-Length: 0
#
U 2008/09/19 14:30:28.287776 192.168.20.1:5060 -> 192.168.20.13:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK2144212896305094925;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=2478014423
From: sip:43@192.168.20.1;tag=2478014423
To: unknown sip:unknown@192.168.20.1;tag=3d05668484314852
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 3 BYE
User-Agent: Grandstream GXW4108 (HW 0001, Ch:6) 1.0.1.2
Contact: sip:9873@192.168.10.2:5066;user=phone
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Supported: replaces, timer, 100rel, path
Content-Length: 0
#
U 2008/09/19 14:30:28.326083 192.168.10.2:5066 -> 192.168.20.1:5060
SIP/2.0 481 No Such Call
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK7263.af092c33.0
Via: SIP/2.0/UDP 
192.168.20.13:5060;branch=z9hG4bK2144212896305094925;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=2478014423
From: sip:43@192.168.20.1;tag=2478014423
To: unknown sip:unknown@192.168.20.1;tag=3d05668484314852
Call-ID: 4263e231cf65ba11@192.168.10.2
CSeq: 3 BYE
User-Agent: Grandstream GXW4108 (HW 0001, Ch:0) 1.0.1.2
Content-Length: 0
#
U 2008/09/19 14:30:28.364322 192.168.20.12:5060 -> 192.168.20.1:5060
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKed4e.8b482304.0
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK2b17d6e34a56abe6
Record-Route: sip:192.168.20.1;lr=on;ftag=10263706333383c3
From: unknown sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 INVITE
Content-Length: 0
#
U 2008/09/19 14:30:28.393542 192.168.20.12:5060 -> 192.168.20.1:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKed4e.8b482304.0
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK2b17d6e34a56abe6
Record-Route: sip:192.168.20.1;lr=on;ftag=10263706333383c3
From: unknown sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060;tag=983812395
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 INVITE
Contact: sip:42@192.168.20.12:5060
Supported: replaces
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, PRACK, 
UPDATE, MESSAGE
Content-Type: application/sdp
Content-Length: 238
v=0
o=42 42889345 25269231 IN IP4 192.168.20.12
s=A conversation
c=IN IP4 192.168.20.12
t=0 0
m=audio 10178 RTP/AVP 8 0 101
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
#
U 2008/09/19 14:30:28.394149 192.168.20.1:5060 -> 192.168.10.2:5066
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK2b17d6e34a56abe6
Record-Route: sip:192.168.20.1;lr=on;ftag=10263706333383c3
From: unknown sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060;tag=983812395
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 INVITE
Contact: sip:42@192.168.20.12:5060
Supported: replaces
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, PRACK, 
UPDATE, MESSAGE
Content-Type: application/sdp
Content-Length: 238
v=0
o=42 42889345 25269231 IN IP4 192.168.20.12
s=A conversation
c=IN IP4 192.168.20.12
t=0 0
m=audio 10178 RTP/AVP 8 0 101
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
#
U 2008/09/19 14:30:28.468273 192.168.20.12:5060 -> 192.168.20.1:5060
BYE sip:43@192.168.20.13:5060 SIP/2.0
Via: SIP/2.0/UDP 
192.168.20.12:5060;branch=z9hG4bK17746209931754612026;rport
Route: sip:192.168.20.1;lr=on;ftag=1176531356
From: 42 sip:42@192.168.20.1:5060;tag=3026415234
To: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 BYE
Max-Forwards: 70
User-Agent: Voip Phone 1.0
Content-Length: 0
#
U 2008/09/19 14:30:28.469112 192.168.20.1:5060 -> 192.168.20.13:5060
BYE sip:43@192.168.20.13:5060 SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=3026415234
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKb676.e21cd317.0
Via: SIP/2.0/UDP 
192.168.20.12:5060;branch=z9hG4bK17746209931754612026;rport=5060
From: 42 sip:42@192.168.20.1:5060;tag=3026415234
To: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 BYE
Max-Forwards: 69
User-Agent: Voip Phone 1.0
Content-Length: 0
P-hint: rr-enforced
#
U 2008/09/19 14:30:28.500801 192.168.10.2:5066 -> 192.168.20.1:5060
CANCEL sip:42@192.168.20.12:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK2b17d6e34a56abe6
Route: sip:192.168.20.1;lr=on;ftag=10263706333383c3
From: "unknown"sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060;tag=983812395
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 CANCEL
User-Agent: Grandstream GXW4108 (HW 0001, Ch:7) 1.0.1.2
Max-Forwards: 70
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Content-Length: 0
#
U 2008/09/19 14:30:28.501604 192.168.20.1:5060 -> 192.168.10.2:5066
SIP/2.0 200 ok -- no more pending branches
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK2b17d6e34a56abe6
From: "unknown"sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060;tag=983812395
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 CANCEL
Server: OpenSer (1.1.1-notls (i386/linux))
Content-Length: 0
Warning: 392 192.168.20.1:5060 "Noisy feedback tells:  pid=1627 
req_src_ip=192.168.10.2 req_src_port=5066 
in_uri=sip:42@192.168.20.12:5060 out_uri=sip:42@192.168.20.12:5060 
via_cnt==1"
#
U 2008/09/19 14:30:28.506648 192.168.20.12:5060 -> 192.168.20.1:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKed4e.8b482304.0
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK2b17d6e34a56abe6
Record-Route: sip:192.168.20.1;lr=on;ftag=10263706333383c3
From: unknown sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060;tag=983812395
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 INVITE
Contact: sip:42@192.168.20.12:5060
Supported: replaces
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, PRACK, 
UPDATE, MESSAGE
Content-Type: application/sdp
Content-Length: 238
v=0
o=42 42889345 25269231 IN IP4 192.168.20.12
s=A conversation
c=IN IP4 192.168.20.12
t=0 0
m=audio 10178 RTP/AVP 8 0 101
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
#
U 2008/09/19 14:30:28.507237 192.168.20.1:5060 -> 192.168.10.2:5066
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK2b17d6e34a56abe6
Record-Route: sip:192.168.20.1;lr=on;ftag=10263706333383c3
From: unknown sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060;tag=983812395
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 INVITE
Contact: sip:42@192.168.20.12:5060
Supported: replaces
Allow: INVITE, ACK, OPTIONS, BYE, CANCEL, REFER, NOTIFY, INFO, PRACK, 
UPDATE, MESSAGE
Content-Type: application/sdp
Content-Length: 238
v=0
o=42 42889345 25269231 IN IP4 192.168.20.12
s=A conversation
c=IN IP4 192.168.20.12
t=0 0
m=audio 10178 RTP/AVP 8 0 101
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
#
U 2008/09/19 14:30:28.521309 192.168.10.2:5066 -> 192.168.20.1:5060
ACK sip:42@192.168.20.12:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK8497d3318fc0bc45
Route: sip:192.168.20.1;lr=on;ftag=10263706333383c3
From: "unknown"sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060;tag=983812395
Contact: sip:9873@192.168.10.2:5066;user=phone
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 ACK
User-Agent: Grandstream GXW4108 (HW 0001, Ch:7) 1.0.1.2
Max-Forwards: 70
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Content-Length: 0
#
U 2008/09/19 14:30:28.522076 192.168.20.1:5060 -> 192.168.20.12:5060
ACK sip:42@192.168.20.12:5060 SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=10263706333383c3
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKed4e.8b482304.2
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bK8497d3318fc0bc45
From: "unknown"sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060;tag=983812395
Contact: sip:9873@192.168.10.2:5066;user=phone
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 ACK
User-Agent: Grandstream GXW4108 (HW 0001, Ch:7) 1.0.1.2
Max-Forwards: 69
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Content-Length: 0
P-hint: rr-enforced
#
U 2008/09/19 14:30:28.638974 192.168.20.13:5060 -> 192.168.20.1:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKb676.e21cd317.0
Via: SIP/2.0/UDP 
192.168.20.12:5060;branch=z9hG4bK17746209931754612026;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=3026415234
From: 42 sip:42@192.168.20.1:5060;tag=3026415234
To: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 BYE
Contact: sip:43@192.168.20.13:5060
Content-Length: 0
#
U 2008/09/19 14:30:28.639596 192.168.20.1:5060 -> 192.168.20.12:5060
SIP/2.0 200 OK
Via: SIP/2.0/UDP 
192.168.20.12:5060;branch=z9hG4bK17746209931754612026;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=3026415234
From: 42 sip:42@192.168.20.1:5060;tag=3026415234
To: usuario43 sip:43@192.168.20.1:5060;tag=1176531356
Call-ID: 66593269826955-13455355112414@192.168.20.13
CSeq: 1 BYE
Contact: sip:43@192.168.20.13:5060
Content-Length: 0
#
U 2008/09/19 14:30:28.664921 192.168.10.2:5066 -> 192.168.20.1:5060
ACK sip:42@192.168.20.12:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bKf6d0f6c1ee93df11
Route: sip:192.168.20.1;lr=on;ftag=10263706333383c3
From: "unknown"sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060;tag=983812395
Contact: sip:9873@192.168.10.2:5066;user=phone
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 ACK
User-Agent: Grandstream GXW4108 (HW 0001, Ch:7) 1.0.1.2
Max-Forwards: 70
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Content-Length: 0
#
U 2008/09/19 14:30:28.665670 192.168.20.1:5060 -> 192.168.20.12:5060
ACK sip:42@192.168.20.12:5060 SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=10263706333383c3
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bKed4e.8b482304.2
Via: SIP/2.0/UDP 192.168.10.2:5066;branch=z9hG4bKf6d0f6c1ee93df11
From: "unknown"sip:unknown@192.168.20.1;tag=10263706333383c3
To: sip:42@192.168.20.1:5060;tag=983812395
Contact: sip:9873@192.168.10.2:5066;user=phone
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 21300 ACK
User-Agent: Grandstream GXW4108 (HW 0001, Ch:7) 1.0.1.2
Max-Forwards: 69
Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK
Content-Length: 0
P-hint: rr-enforced
#
U 2008/09/19 14:30:41.078326 192.168.20.12:5060 -> 192.168.20.1:5060
BYE sip:9873@192.168.10.2:5066;user=phone SIP/2.0
Via: SIP/2.0/UDP 192.168.20.12:5060;branch=z9hG4bK1309813609243777314;rport
Route: sip:192.168.20.1;lr=on;ftag=10263706333383c3
From: sip:42@192.168.20.1:5060;tag=983812395
To: unknown sip:unknown@192.168.20.1;tag=10263706333383c3
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 1 BYE
Max-Forwards: 70
User-Agent: Voip Phone 1.0
Content-Length: 0
#
U 2008/09/19 14:30:41.078856 192.168.20.1:5060 -> 192.168.10.2:5066
BYE sip:9873@192.168.10.2:5066;user=phone SIP/2.0
Record-Route: sip:192.168.20.1;lr=on;ftag=983812395
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK48e9.dc5f3ea5.0
Via: SIP/2.0/UDP 
192.168.20.12:5060;branch=z9hG4bK1309813609243777314;rport=5060
From: sip:42@192.168.20.1:5060;tag=983812395
To: unknown sip:unknown@192.168.20.1;tag=10263706333383c3
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 1 BYE
Max-Forwards: 69
User-Agent: Voip Phone 1.0
Content-Length: 0
P-hint: rr-enforced
#
U 2008/09/19 14:30:41.183529 192.168.10.2:5066 -> 192.168.20.1:5060
SIP/2.0 481 No Such Call
Via: SIP/2.0/UDP 192.168.20.1;branch=z9hG4bK48e9.dc5f3ea5.0
Via: SIP/2.0/UDP 
192.168.20.12:5060;branch=z9hG4bK1309813609243777314;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=983812395
From: sip:42@192.168.20.1:5060;tag=983812395
To: unknown sip:unknown@192.168.20.1;tag=10263706333383c3
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 1 BYE
User-Agent: Grandstream GXW4108 (HW 0001, Ch:0) 1.0.1.2
Content-Length: 0
#
U 2008/09/19 14:30:41.183840 192.168.20.1:5060 -> 192.168.20.12:5060
SIP/2.0 481 No Such Call
Via: SIP/2.0/UDP 
192.168.20.12:5060;branch=z9hG4bK1309813609243777314;rport=5060
Record-Route: sip:192.168.20.1;lr=on;ftag=983812395
From: sip:42@192.168.20.1:5060;tag=983812395
To: unknown sip:unknown@192.168.20.1;tag=10263706333383c3
Call-ID: e400cdc544f16303@192.168.10.2
CSeq: 1 BYE
User-Agent: Grandstream GXW4108 (HW 0001, Ch:0) 1.0.1.2
Content-Length: 0