#
U 59.176.78.110:50496 -> 210.68.65.78:5060
INVITE sip:12818495027@210.68.65.78;user=phone SIP/2.0.
Via: SIP/2.0/UDP 59.176.78.110:50496.
From: sip:user1@210.68.65.78;tag=4154163258.
To:  <sip:12818495027@210.68.65.78;user=phone>.
Call-ID: 4202237689@192.168.1.156.
CSeq: 2 INVITE.
Contact:  <sip:user1@59.176.78.110:50496;transport=udp>.
User-Agent: Cisco ATA  v2.15 ata18x (020927a).
Authorization: Digest username="user1",realm="210.68.65.78",nonce="465d1c726401e9baa5a576616b3efbbba1928d0f",uri="sip:12818495027@.
Expires: 300.
Content-Length: 252.
Content-Type: application/sdp.
.
v=0.
o=user1 83758 83758 IN IP4 59.176.78.110.
s=ATA186 Call.
c=IN IP4 59.176.78.110.
t=0 0.
m=audio 10000 RTP/AVP 18 8 0 101.
a=rtpmap:18 G729/8000/1.
a=rtpmap:8 PCMA/8000/1.
a=rtpmap:0 PCMU/8000/1.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.

#
U 210.68.65.78:5060 -> 59.176.78.110:50496
SIP/2.0 100 trying -- your call is important to us.
Via: SIP/2.0/UDP 59.176.78.110:50496.
From: sip:user1@210.68.65.78;tag=4154163258.
To:  <sip:12818495027@210.68.65.78;user=phone>.
Call-ID: 4202237689@192.168.1.156.
CSeq: 2 INVITE.
Server: OpenSer (1.0.1 (i386/linux)).
Content-Length: 0.
Warning: 392 210.68.65.78:5060 "Noisy feedback tells:  pid=2145 req_src_ip=59.176.78.110 req_src_port=50496 in_uri=sip:12818495027.
.

#
U 210.68.65.78:5060 -> 209.67.171.10:5060
INVITE sip:12818495027@209.67.171.10:5060;user=phone SIP/2.0.
Max-Forwards: 10.
Record-Route: <sip:210.68.65.78;ftag=4154163258;lr>.
Via: SIP/2.0/UDP 210.68.65.78;branch=z9hG4bK0661.b774ff33.0.
Via: SIP/2.0/UDP 59.176.78.110:50496.
From: sip:user1@210.68.65.78;tag=4154163258.
To:  <sip:12818495027@210.68.65.78;user=phone>.
Call-ID: 4202237689@192.168.1.156.
CSeq: 2 INVITE.
Contact:  <sip:user1@59.176.78.110:50496;transport=udp>.
User-Agent: Cisco ATA  v2.15 ata18x (020927a).
Authorization: Digest username="user1",realm="210.68.65.78",nonce="465d1c726401e9baa5a576616b3efbbba1928d0f",uri="sip:12818495027@.
Expires: 300.
Content-Length: 252.
Content-Type: application/sdp.
.
v=0.
o=user1 83758 83758 IN IP4 59.176.78.110.
s=ATA186 Call.
c=IN IP4 59.176.78.110.
t=0 0.
m=audio 10000 RTP/AVP 18 8 0 101.
a=rtpmap:18 G729/8000/1.
a=rtpmap:8 PCMA/8000/1.
a=rtpmap:0 PCMU/8000/1.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.

#
U 210.68.65.78:5060 -> 209.67.171.10:5060
INVITE sip:12818495027@209.67.171.10:5060;user=phone SIP/2.0.
Max-Forwards: 10.
Record-Route: <sip:210.68.65.78;ftag=4154163258;lr>.
Via: SIP/2.0/UDP 210.68.65.78;branch=z9hG4bK0661.b774ff33.0.
Via: SIP/2.0/UDP 59.176.78.110:50496.
From: sip:user1@210.68.65.78;tag=4154163258.
To:  <sip:12818495027@210.68.65.78;user=phone>.
Call-ID: 4202237689@192.168.1.156.
CSeq: 2 INVITE.
Contact:  <sip:user1@59.176.78.110:50496;transport=udp>.
User-Agent: Cisco ATA  v2.15 ata18x (020927a).
Authorization: Digest username="user1",realm="210.68.65.78",nonce="465d1c726401e9baa5a576616b3efbbba1928d0f",uri="sip:12818495027@.
Expires: 300.
Content-Length: 252.
Content-Type: application/sdp.
.
v=0.
o=user1 83758 83758 IN IP4 59.176.78.110.
s=ATA186 Call.
c=IN IP4 59.176.78.110.
t=0 0.
m=audio 10000 RTP/AVP 18 8 0 101.
a=rtpmap:18 G729/8000/1.
a=rtpmap:8 PCMA/8000/1.
a=rtpmap:0 PCMU/8000/1.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.

#
U 209.67.171.10:5060 -> 210.68.65.78:5060
SIP/2.0 100 Trying.
CSeq: 2 INVITE.
Via: SIP/2.0/UDP 210.68.65.78;branch=z9hG4bK0661.b774ff33.0.
Via: SIP/2.0/UDP 59.176.78.110:50496.
From: sip:user1@210.68.65.78;tag=4154163258.
Call-ID: 4202237689@192.168.1.156.
To: <sip:12818495027@210.68.65.78;user=phone>;tag=3005360702044301069847989.
Contact: <sip:209.67.171.10:5060;transport=udp>.
Content-Length: 0.
Record-Route: <sip:210.68.65.78;ftag=4154163258;lr>.
.

#
U 59.176.78.110:50378 -> 210.68.65.78:5060
.

#
U 209.67.171.10:5060 -> 210.68.65.78:5060
SIP/2.0 183 Session Progress.
CSeq: 2 INVITE.
Via: SIP/2.0/UDP 210.68.65.78;branch=z9hG4bK0661.b774ff33.0.
Via: SIP/2.0/UDP 59.176.78.110:50496.
From: sip:user1@210.68.65.78;tag=4154163258.
Call-ID: 4202237689@192.168.1.156.
To: <sip:12818495027@210.68.65.78;user=phone>;tag=3005360702044301069847989.
Contact: <sip:209.67.171.10:5060;transport=udp>.
Content-Type: application/sdp.
Content-Length: 215.
Record-Route: <sip:210.68.65.78;ftag=4154163258;lr>.
.
v=0.
o=VoipSwitch 8988 8988 IN IP4 209.67.171.10.
s=VoipSIP.
i=Audio Session.
c=IN IP4 209.67.171.10.
t=0 0.
m=audio 7988 RTP/AVP 18 101.
a=rtpmap:18 G729/8000/1.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.

#
U 210.68.65.78:5060 -> 59.176.78.110:50496
SIP/2.0 183 Session Progress.
CSeq: 2 INVITE.
Via: SIP/2.0/UDP 59.176.78.110:50496.
From: sip:user1@210.68.65.78;tag=4154163258.
Call-ID: 4202237689@192.168.1.156.
To: <sip:12818495027@210.68.65.78;user=phone>;tag=3005360702044301069847989.
Contact: <sip:209.67.171.10:5060;transport=udp>.
Content-Type: application/sdp.
Content-Length: 215.
Record-Route: <sip:210.68.65.78;ftag=4154163258;lr>.
.
v=0.
o=VoipSwitch 8988 8988 IN IP4 209.67.171.10.
s=VoipSIP.
i=Audio Session.
c=IN IP4 209.67.171.10.
t=0 0.
m=audio 7988 RTP/AVP 18 101.
a=rtpmap:18 G729/8000/1.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.

#
U 210.68.65.78:5060 -> 59.176.78.110:50378
....
#
U 209.67.171.10:5060 -> 210.68.65.78:5060
SIP/2.0 200 OK.
CSeq: 2 INVITE.
Via: SIP/2.0/UDP 210.68.65.78;branch=z9hG4bK0661.b774ff33.0.
Via: SIP/2.0/UDP 59.176.78.110:50496.
From: sip:user1@210.68.65.78;tag=4154163258.
Call-ID: 4202237689@192.168.1.156.
To: <sip:12818495027@210.68.65.78;user=phone>;tag=3005360702044301069847989.
Contact: <sip:209.67.171.10:5060;transport=udp>.
Content-Type: application/sdp.
Content-Length: 215.
Record-Route: <sip:210.68.65.78;ftag=4154163258;lr>.
.
v=0.
o=VoipSwitch 8988 8988 IN IP4 209.67.171.10.
s=VoipSIP.
i=Audio Session.
c=IN IP4 209.67.171.10.
t=0 0.
m=audio 7988 RTP/AVP 18 101.
a=rtpmap:18 G729/8000/1.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.

#
U 210.68.65.78:5060 -> 59.176.78.110:50496
SIP/2.0 200 OK.
CSeq: 2 INVITE.
Via: SIP/2.0/UDP 59.176.78.110:50496.
From: sip:user1@210.68.65.78;tag=4154163258.
Call-ID: 4202237689@192.168.1.156.
To: <sip:12818495027@210.68.65.78;user=phone>;tag=3005360702044301069847989.
Contact: <sip:209.67.171.10:5060;transport=udp>.
Content-Type: application/sdp.
Content-Length: 215.
Record-Route: <sip:210.68.65.78;ftag=4154163258;lr>.
.
v=0.
o=VoipSwitch 8988 8988 IN IP4 209.67.171.10.
s=VoipSIP.
i=Audio Session.
c=IN IP4 209.67.171.10.
t=0 0.
m=audio 7988 RTP/AVP 18 101.
a=rtpmap:18 G729/8000/1.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.

#
U 59.176.78.110:50496 -> 210.68.65.78:5060
ACK sip:210.68.65.78 SIP/2.0.
Route: <sip:@209.67.171.10;transport=udp>.
Via: SIP/2.0/UDP 59.176.78.110:50496.
From: sip:user1@210.68.65.78;tag=4154163258.
To:  <sip:12818495027@210.68.65.78;user=phone>;tag=3005360702044301069847989.
Call-ID: 4202237689@192.168.1.156.
CSeq: 2 ACK.
User-Agent: Cisco ATA  v2.15 ata18x (020927a).
Content-Length: 0.
.

#
U 59.176.78.110:50378 -> 210.68.65.78:5060
.

#
U 59.176.78.110:50496 -> 210.68.65.78:5060
BYE sip:210.68.65.78 SIP/2.0.
Route: <sip:@209.67.171.10;transport=udp>.
Via: SIP/2.0/UDP 59.176.78.110:50496.
From: sip:user1@210.68.65.78;tag=4154163258.
To:  <sip:12818495027@210.68.65.78;user=phone>;tag=3005360702044301069847989.
Call-ID: 4202237689@192.168.1.156.
CSeq: 3 BYE.
User-Agent: Cisco ATA  v2.15 ata18x (020927a).
Content-Length: 0.
.

#
U 210.68.65.78:5060 -> 59.176.78.110:50496
SIP/2.0 478 Unresolvable destination (478/TM).
Via: SIP/2.0/UDP 59.176.78.110:50496.
From: sip:user1@210.68.65.78;tag=4154163258.
To:  <sip:12818495027@210.68.65.78;user=phone>;tag=3005360702044301069847989.
Call-ID: 4202237689@192.168.1.156.
CSeq: 3 BYE.
Server: OpenSer (1.0.1 (i386/linux)).
Content-Length: 0.
Warning: 392 210.68.65.78:5060 "Noisy feedback tells:  pid=2144 req_src_ip=59.176.78.110 req_src_port=50496 in_uri=sip:210.68.65.78.
.

#
U 59.176.78.110:50378 -> 210.68.65.78:5060