[Spce-user] Udp to Tcp sig generates big mtu making the messages to fail

Sun Apr 27 04:19:07 EDT 2014

Hello list,

New to the list - maybe i could get an opinion on an issue i am facing
using a setup with Sipwise CE.
Using 2.8, 3.0 versions, tested on the 3.2.1 on a test machine, the same.

Setup and problem description( see attached file):

- running Sipwise in the front doing sig( tcp) to uac and sig udp to
asterisk + rtp and an Asterisk in the back doing sig udp.
- uac1 calls uac 2, the calls gets answered, uac2 sends bye;
- when bye is received by asterisk it sends an invite back( strange
behaviour to me, but since asterisk is a b2bua may be legit to try to get
the media back if there are any further steps to pass in the dialplan
before sending the final bye);
- Sipwise receives the invite from asterisk (udp) and passed the invite to
uac( tcp) < here the trouble occours, the invite is a large packet that
gets fragmented; the result is that down the line the uac does not ack the
re-invite, so the call gets stuck.
- using the same scenario but for the call leg Sipwise-uac using udp or tls
i see the same call flow but the mtu of frames is less than 1500 => packets
are not fragmented => calls end ok.

I attach a ngrep trace to show the issue, a pcap contains sensitive
information( ip, usernames).

The approach could be to stripe down the size of the packets, been trying
to toggle parameters in sems white/blacklist but could not find a working
solution > if i could find some suggestions would be appreciated.

Thanks and regards,

Cosmin
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T $caller_ip:44972 -> $sipwise_ip:5060 [AP]
INVITE sip:$called_number@$sip-domain;transport=TCP SIP/2.0.
Via: SIP/2.0/TCP 10.10.10.56:5060;branch=z9hG4bK-d8754z-4d04a80ababd7a93-1---d8754z-.
Max-Forwards: 70.
Contact: <sip:$username@$caller_ip:5060;transport=TCP>.
To: <sip:$called_number@$sip-domain;transport=TCP>.
From: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
CSeq: 1 INVITE.
Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO, SUBSCRIBE.
Content-Type: application/sdp.
Supported: replaces, norefersub, extended-refer, timer, X-cisco-serviceuri.
User-Agent: Zoiper r21999.
Allow-Events: presence, kpml.
Content-Length: 192.
.
v=0.
o=Zoiper 0 0 IN IP4 $caller_ip.
s=Zoiper.
c=IN IP4 $caller_ip.
t=0 0.
m=audio 33000 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=sendrecv.

T $sipwise_ip:5060 -> $caller_ip:44972 [AP]
SIP/2.0 100 Trying.
Via: SIP/2.0/TCP 10.10.10.56:5060;rport=44972;received=$caller_ip;branch=z9hG4bK-d8754z-4d04a80ababd7a93-1---d8754z-.
To: <sip:$called_number@$sip-domain;transport=TCP>.
From: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
CSeq: 1 INVITE.
Server: Sipwise NGCP Proxy 2.X.
Content-Length: 0.
.

T $sipwise_ip:5060 -> $caller_ip:44972 [AP]
SIP/2.0 407 Proxy Authentication Required.
Via: SIP/2.0/TCP 10.10.10.56:5060;rport=44972;received=$caller_ip;branch=z9hG4bK-d8754z-4d04a80ababd7a93-1---d8754z-.
To: <sip:$called_number@$sip-domain;transport=TCP>;tag=e1e48e0d2ad8b2d1889edd0eb4ed93ed.1deb.
From: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
CSeq: 1 INVITE.
Proxy-Authenticate: Digest realm="$sip-domain", nonce="Uwb6x1MG+ZvedPvibEBt8SgoCS+RpNQf".
Server: Sipwise NGCP Proxy 2.X.
Content-Length: 0.
.

T $caller_ip:44972 -> $sipwise_ip:5060 [AP]
ACK sip:$called_number@$sip-domain;transport=TCP SIP/2.0.
Via: SIP/2.0/TCP 10.10.10.56:5060;branch=z9hG4bK-d8754z-4d04a80ababd7a93-1---d8754z-.
Max-Forwards: 70.
To: <sip:$called_number@$sip-domain;transport=TCP>;tag=e1e48e0d2ad8b2d1889edd0eb4ed93ed.1deb.
From: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
CSeq: 1 ACK.
Content-Length: 0.
.

T $caller_ip:44972 -> $sipwise_ip:5060 [AP]
INVITE sip:$called_number@$sip-domain;transport=TCP SIP/2.0.
Via: SIP/2.0/TCP 10.10.10.56:5060;branch=z9hG4bK-d8754z-16d76a817647c970-1---d8754z-.
Max-Forwards: 70.
Contact: <sip:$username@$caller_ip:5060;transport=TCP>.
To: <sip:$called_number@$sip-domain;transport=TCP>.
From: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
CSeq: 2 INVITE.
Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO, SUBSCRIBE.
Content-Type: application/sdp.
Proxy-Authorization: Digest username="$username",realm="$sip-domain",nonce="Uwb6x1MG+ZvedPvibEBt8SgoCS+RpNQf",uri="sip:$called_number@$sip-domain;transport=TCP",response="bed139da3effeee93084dae2f29f2dba",algorithm=MD5.
Supported: replaces, norefersub, extended-refer, timer, X-cisco-serviceuri.
User-Agent: Zoiper r21999.
Allow-Events: presence, kpml.
Content-Length: 192.
.
v=0.
o=Zoiper 0 0 IN IP4 $caller_ip.
s=Zoiper.
c=IN IP4 $caller_ip.
t=0 0.
m=audio 33000 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=sendrecv.

T $sipwise_ip:5060 -> $caller_ip:44972 [AP]
SIP/2.0 100 Trying.
Via: SIP/2.0/TCP 10.10.10.56:5060;rport=44972;received=$caller_ip;branch=z9hG4bK-d8754z-16d76a817647c970-1---d8754z-.
To: <sip:$called_number@$sip-domain;transport=TCP>.
From: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
CSeq: 2 INVITE.
Server: Sipwise NGCP Proxy 2.X.
Content-Length: 0.
.

U $sipwise_ip:5060 -> $asterisk_ip:5060
INVITE sip:$called_number@$asterisk_ip:5060;transport=udp SIP/2.0.
Max-Forwards: 10.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bKdd75.731ff9c3a7cc0860e3eb9413cca4fb9b.0.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bK4lTM1aQJ;rport=5080.
From: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
To: <sip:$called_number@$asterisk_ip>.
CSeq: 10 INVITE.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO, SUBSCRIBE.
Supported: replaces, norefersub, extended-refer, timer, X-cisco-serviceuri.
P-Asserted-Identity: <sip:4$caller_number@$sip-domain>.
Content-Type: application/sdp.
Content-Length: 206.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.
v=0.
o=Zoiper 0 0 IN IP4 $sipwise_ip.
s=Zoiper.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35506 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-15.
a=sendrecv.
a=rtcp:35507.

U $asterisk_ip:5060 -> $sipwise_ip:5060
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bKdd75.731ff9c3a7cc0860e3eb9413cca4fb9b.0;received=$sipwise_ip;rport=5060.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bK4lTM1aQJ;rport=5080.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
From: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
To: <sip:$called_number@$asterisk_ip>.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
CSeq: 10 INVITE.
Server: Asterisk PBX 1.8.24.0.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Session-Expires: 1800;refresher=uas.
Contact: <sip:$called_number@$asterisk_ip:5060>.
Content-Length: 0.
.

U $asterisk_ip:5060 -> $sipwise_ip:5060
INVITE sip:$called_number@$sipwise_ip SIP/2.0.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK5e28d101;rport.
Max-Forwards: 70.
From: "4$caller_number" <sip:4$caller_number@$asterisk_ip>;tag=as176d378e.
To: <sip:$called_number@$sipwise_ip>.
Contact: <sip:4$caller_number@$asterisk_ip:5060>.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060.
CSeq: 102 INVITE.
User-Agent: Asterisk PBX 1.8.24.0.
Date: Fri, 21 Feb 2014 07:00:43 GMT.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
P-Asserted-Identity: "4$caller_number" <sip:4$caller_number@$asterisk_ip>.
Content-Type: application/sdp.
Content-Length: 233.
.
v=0.
o=root 962922854 962922854 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35506 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.

U $sipwise_ip:5060 -> $asterisk_ip:5060
SIP/2.0 100 Trying.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK5e28d101;rport=5060.
From: "4$caller_number" <sip:4$caller_number@$asterisk_ip>;tag=as176d378e.
To: <sip:$called_number@$sipwise_ip>.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060.
CSeq: 102 INVITE.
Server: Sipwise NGCP Proxy 2.X.
Content-Length: 0.
.

U $sipwise_ip:5060 -> $called_ip:5060
Max-Forwards: 10.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bK7d8e.23b7c64d6305d6dc25b5256aba1746db.0.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKGTrr5a99;rport=5080.
From: <sip:$caller_number@$sip-domain>;tag=5180DD30-5306F99B000A09EE-E149C700.
To: <sip:$username_B@$sip-domain>.
CSeq: 10 INVITE.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060_b2b-1.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
P-Asserted-Identity: <sip:$caller_number@$asterisk_ip>.
Content-Type: application/sdp.
Content-Length: 247.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.
v=0.
o=root 962922854 962922854 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35510 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.
a=rtcp:35511.

U $called_ip:5060 -> $sipwise_ip:5060
SIP/2.0 180 Ringing.
To: <sip:$username_B@$sip-domain>;tag=e76e9ae7.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bK7d8e.23b7c64d6305d6dc25b5256aba1746db.0,SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKGTrr5a99;rport=5080.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>,<sip:192.168.2.2;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>.
CSeq: 10 INVITE.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060_b2b-1.
From: <sip:$caller_number@$sip-domain>;tag=5180DD30-5306F99B000A09EE-E149C700.
Contact: "$username_B" <sip:$username_B at 192.168.3.169:5060;transport=udp;registering_acc=sip_internet-phone_ro>.
User-Agent: Jitsi2.4.4997Windows 7.
Content-Length: 0.
.

U $sipwise_ip:5060 -> $asterisk_ip:5060
SIP/2.0 180 Ringing.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=as176d378e;did=d1d.bc21;mpd=ii;ice_caller=strip;ice_callee=strip;rtpprx=yes;vsf=eXpVZEF7aGlkTmVJNUYHaiIqcBUjIAEkHjMtfSYuBCVRaAA2>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=as176d378e;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=as176d378e;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK5e28d101;rport=5060.
From: "4$caller_number" <sip:4$caller_number@$asterisk_ip>;tag=as176d378e.
To: <sip:$called_number@$sipwise_ip>;tag=527BF807-5306F99B000A0948-E0B93700.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060.
CSeq: 102 INVITE.
User-Agent: Jitsi2.4.4997Windows 7.
Content-Length: 0.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.

U $asterisk_ip:5060 -> $sipwise_ip:5060
SIP/2.0 180 Ringing.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bKdd75.731ff9c3a7cc0860e3eb9413cca4fb9b.0;received=$sipwise_ip;rport=5060.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bK4lTM1aQJ;rport=5080.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
From: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
To: <sip:$called_number@$asterisk_ip>;tag=as79cf42e4.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
CSeq: 10 INVITE.
Server: Asterisk PBX 1.8.24.0.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Session-Expires: 1800;refresher=uas.
Contact: <sip:$called_number@$asterisk_ip:5060>.
Content-Length: 0.
.

T $sipwise_ip:5060 -> $caller_ip:44972 [AP]
SIP/2.0 180 Ringing.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=ac2fd977;did=80d.6e2;mpd=ii;ice_caller=strip;ice_callee=strip;rtpprx=yes;vsf=eXpVZEk9MSk6AQYMNkJ1WXpqcEp5elVkRXhoaWdGa0s0RnJZelEEOBgUJhQqChxUMwU7>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=ac2fd977;nat=yes;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Record-Route: <sip:$sipwise_ip;transport=tcp;r2=on;lr=on;ftag=ac2fd977;nat=yes;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Via: SIP/2.0/TCP 10.10.10.56:5060;rport=44972;received=$caller_ip;branch=z9hG4bK-d8754z-16d76a817647c970-1---d8754z-.
To: <sip:$called_number@$sip-domain;transport=TCP>;tag=0504051D-5306F99B00089B1C-E0A92700.
From: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
CSeq: 2 INVITE.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Length: 0.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.

U $called_ip:5060 -> $sipwise_ip:5060
SIP/2.0 180 Ringing.
To: <sip:$username_B@$sip-domain>;tag=e76e9ae7.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bK7d8e.23b7c64d6305d6dc25b5256aba1746db.0,SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKGTrr5a99;rport=5080.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>,<sip:192.168.2.2;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>.
CSeq: 10 INVITE.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060_b2b-1.
From: <sip:$caller_number@$sip-domain>;tag=5180DD30-5306F99B000A09EE-E149C700.
Contact: "$username_B" <sip:$username_B at 192.168.3.169:5060;transport=udp;registering_acc=sip_internet-phone_ro>.
User-Agent: Jitsi2.4.4997Windows 7.
Content-Length: 0.
.

U $sipwise_ip:5060 -> $asterisk_ip:5060
SIP/2.0 180 Ringing.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=as176d378e;did=d1d.bc21;mpd=ii;ice_caller=strip;ice_callee=strip;rtpprx=yes;vsf=eXpVZEF7aGlkTmVJNUYHaiIqcBUjIAEkHjMtfSYuBCVRaAA2>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=as176d378e;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=as176d378e;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK5e28d101;rport=5060.
From: "4$caller_number" <sip:4$caller_number@$asterisk_ip>;tag=as176d378e.
To: <sip:$called_number@$sipwise_ip>;tag=527BF807-5306F99B000A0948-E0B93700.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060.
CSeq: 102 INVITE.
User-Agent: Jitsi2.4.4997Windows 7.
Content-Length: 0.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.

U $called_ip:5060 -> $sipwise_ip:5060
SIP/2.0 180 Ringing.
To: <sip:$username_B@$sip-domain>;tag=e76e9ae7.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bK7d8e.23b7c64d6305d6dc25b5256aba1746db.0,SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKGTrr5a99;rport=5080.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>,<sip:192.168.2.2;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>.
CSeq: 10 INVITE.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060_b2b-1.
From: <sip:$caller_number@$sip-domain>;tag=5180DD30-5306F99B000A09EE-E149C700.
Contact: "$username_B" <sip:$username_B at 192.168.3.169:5060;transport=udp;registering_acc=sip_internet-phone_ro>.
User-Agent: Jitsi2.4.4997Windows 7.
Content-Length: 0.
.

U $sipwise_ip:5060 -> $asterisk_ip:5060
SIP/2.0 180 Ringing.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=as176d378e;did=d1d.bc21;mpd=ii;ice_caller=strip;ice_callee=strip;rtpprx=yes;vsf=eXpVZEF7aGlkTmVJNUYHaiIqcBUjIAEkHjMtfSYuBCVRaAA2>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=as176d378e;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=as176d378e;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK5e28d101;rport=5060.
From: "4$caller_number" <sip:4$caller_number@$asterisk_ip>;tag=as176d378e.
To: <sip:$called_number@$sipwise_ip>;tag=527BF807-5306F99B000A0948-E0B93700.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060.
CSeq: 102 INVITE.
User-Agent: Jitsi2.4.4997Windows 7.
Content-Length: 0.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.

U $called_ip:5060 -> $sipwise_ip:5060
SIP/2.0 180 Ringing.
To: <sip:$username_B@$sip-domain>;tag=e76e9ae7.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bK7d8e.23b7c64d6305d6dc25b5256aba1746db.0,SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKGTrr5a99;rport=5080.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>,<sip:192.168.2.2;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>.
CSeq: 10 INVITE.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060_b2b-1.
From: <sip:$caller_number@$sip-domain>;tag=5180DD30-5306F99B000A09EE-E149C700.
Contact: "$username_B" <sip:$username_B at 192.168.3.169:5060;transport=udp;registering_acc=sip_internet-phone_ro>.
User-Agent: Jitsi2.4.4997Windows 7.
Content-Length: 0.
.

U $sipwise_ip:5060 -> $asterisk_ip:5060
SIP/2.0 180 Ringing.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=as176d378e;did=d1d.bc21;mpd=ii;ice_caller=strip;ice_callee=strip;rtpprx=yes;vsf=eXpVZEF7aGlkTmVJNUYHaiIqcBUjIAEkHjMtfSYuBCVRaAA2>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=as176d378e;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=as176d378e;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK5e28d101;rport=5060.
From: "4$caller_number" <sip:4$caller_number@$asterisk_ip>;tag=as176d378e.
To: <sip:$called_number@$sipwise_ip>;tag=527BF807-5306F99B000A0948-E0B93700.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060.
CSeq: 102 INVITE.
User-Agent: Jitsi2.4.4997Windows 7.
Content-Length: 0.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.

U $called_ip:5060 -> $sipwise_ip:5060
SIP/2.0 200 OK.
To: <sip:$username_B@$sip-domain>;tag=e76e9ae7.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bK7d8e.23b7c64d6305d6dc25b5256aba1746db.0,SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKGTrr5a99;rport=5080.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>,<sip:192.168.2.2;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>.
CSeq: 10 INVITE.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060_b2b-1.
From: <sip:$caller_number@$sip-domain>;tag=5180DD30-5306F99B000A09EE-E149C700.
Contact: "$username_B" <sip:$username_B at 192.168.3.169:5060;transport=udp;registering_acc=sip_internet-phone_ro>.
User-Agent: Jitsi2.4.4997Windows 7.
Content-Type: application/sdp.
Content-Length: 127.
.
v=0.
o=$username_B 0 0 IN IP4 192.168.3.169.
s=-.
c=IN IP4 192.168.3.169.
t=0 0.
m=audio 5008 RTP/AVP 8.
a=rtpmap:8 PCMA/8000.

U $sipwise_ip:5060 -> $asterisk_ip:5060
SIP/2.0 200 OK.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=as176d378e;did=d1d.bc21;mpd=ii;ice_caller=strip;ice_callee=strip;rtpprx=yes;vsf=eXpVZEF7aGlkTmVJNUYHaiIqcBUjIAEkHjMtfSYuBCVRaAA2>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=as176d378e;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=as176d378e;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK5e28d101;rport=5060.
From: "4$caller_number" <sip:4$caller_number@$asterisk_ip>;tag=as176d378e.
To: <sip:$called_number@$sipwise_ip>;tag=527BF807-5306F99B000A0948-E0B93700.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060.
CSeq: 102 INVITE.
User-Agent: Jitsi2.4.4997Windows 7.
Content-Type: application/sdp.
Content-Length: 186.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.
v=0.
o=$username_B 0 0 IN IP4 $sipwise_ip.
s=-.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35512 RTP/AVP 8.
a=rtpmap:8 PCMA/8000.
a=oldmediaip:192.168.3.169.
a=direction:active.
a=rtcp:35513.

U $asterisk_ip:5060 -> $sipwise_ip:5060
ACK sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA SIP/2.0.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK1db1d8a1;rport.
Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=as176d378e;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>,<sip:192.168.2.2;r2=on;lr=on;ftag=as176d378e;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>,<sip:192.168.2.2:5062;lr=on;ftag=as176d378e;did=d1d.bc21;mpd=ii;ice_caller=strip;ice_callee=strip;rtpprx=yes;vsf=eXpVZEF7aGlkTmVJNUYHaiIqcBUjIAEkHjMtfSYuBCVRaAA2>.
Max-Forwards: 70.
From: "4$caller_number" <sip:4$caller_number@$asterisk_ip>;tag=as176d378e.
To: <sip:$called_number@$sipwise_ip>;tag=527BF807-5306F99B000A0948-E0B93700.
Contact: <sip:4$caller_number@$asterisk_ip:5060>.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060.
CSeq: 102 ACK.
User-Agent: Asterisk PBX 1.8.24.0.
Content-Length: 0.
.

U $sipwise_ip:5060 -> $called_ip:5060
ACK sip:$username_B at 192.168.3.169:5060;transport=udp;registering_acc=sip_internet-phone_ro SIP/2.0.
Max-Forwards: 10.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bK7d8e.445ed5220b5c147578f5e28158681dfe.0.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKOjuaqag0;rport=5080.
From: <sip:$caller_number@$sip-domain>;tag=5180DD30-5306F99B000A09EE-E149C700.
To: <sip:$username_B@$sip-domain>;tag=e76e9ae7.
CSeq: 10 ACK.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060_b2b-1.
User-Agent: Asterisk PBX 1.8.24.0.
Content-Length: 0.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.

U $asterisk_ip:5060 -> $sipwise_ip:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bKdd75.731ff9c3a7cc0860e3eb9413cca4fb9b.0;received=$sipwise_ip;rport=5060.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bK4lTM1aQJ;rport=5080.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
From: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
To: <sip:$called_number@$asterisk_ip>;tag=as79cf42e4.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
CSeq: 10 INVITE.
Server: Asterisk PBX 1.8.24.0.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Session-Expires: 1800;refresher=uas.
Contact: <sip:$called_number@$asterisk_ip:5060>.
Content-Type: application/sdp.
Require: timer.
Content-Length: 233.
.
v=0.
o=root 616138497 616138497 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35512 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.

T $sipwise_ip:5060 -> $caller_ip:44972 [AP]
SIP/2.0 200 OK.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=ac2fd977;did=80d.6e2;mpd=ii;ice_caller=strip;ice_callee=strip;rtpprx=yes;vsf=eXpVZEk9MSk6AQYMNkJ1WXpqcEp5elVkRXhoaWdGa0s0RnJZelEEOBgUJhQqChxUMwU7>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=ac2fd977;nat=yes;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Record-Route: <sip:$sipwise_ip;transport=tcp;r2=on;lr=on;ftag=ac2fd977;nat=yes;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Via: SIP/2.0/TCP 10.10.10.56:5060;rport=44972;received=$caller_ip;branch=z9hG4bK-d8754z-16d76a817647c970-1---d8754z-.
To: <sip:$called_number@$sip-domain;transport=TCP>;tag=0504051D-5306F99B00089B1C-E0A92700.
From: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
CSeq: 2 INVITE.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Require: timer.
Content-Type: application/sdp.
Content-Length: 247.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.
v=0.
o=root 616138497 616138497 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35508 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.
a=rtcp:35509.

U $asterisk_ip:5060 -> $sipwise_ip:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bKdd75.731ff9c3a7cc0860e3eb9413cca4fb9b.0;received=$sipwise_ip;rport=5060.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bK4lTM1aQJ;rport=5080.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
From: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
To: <sip:$called_number@$asterisk_ip>;tag=as79cf42e4.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
CSeq: 10 INVITE.
Server: Asterisk PBX 1.8.24.0.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Session-Expires: 1800;refresher=uas.
Contact: <sip:$called_number@$asterisk_ip:5060>.
Content-Type: application/sdp.
Require: timer.
Content-Length: 233.
.
v=0.
o=root 616138497 616138497 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35512 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.

T $sipwise_ip:5060 -> $caller_ip:44972 [AP]
SIP/2.0 200 OK.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=ac2fd977;did=80d.6e2;mpd=ii;ice_caller=strip;ice_callee=strip;rtpprx=yes;vsf=eXpVZEk9MSk6AQYMNkJ1WXpqcEp5elVkRXhoaWdGa0s0RnJZelEEOBgUJhQqChxUMwU7>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=ac2fd977;nat=yes;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Record-Route: <sip:$sipwise_ip;transport=tcp;r2=on;lr=on;ftag=ac2fd977;nat=yes;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Via: SIP/2.0/TCP 10.10.10.56:5060;rport=44972;received=$caller_ip;branch=z9hG4bK-d8754z-16d76a817647c970-1---d8754z-.
To: <sip:$called_number@$sip-domain;transport=TCP>;tag=0504051D-5306F99B00089B1C-E0A92700.
From: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
CSeq: 2 INVITE.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Require: timer.
Content-Type: application/sdp.
Content-Length: 247.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.
v=0.
o=root 616138497 616138497 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35508 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.
a=rtcp:35509.

U $asterisk_ip:5060 -> $sipwise_ip:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bKdd75.731ff9c3a7cc0860e3eb9413cca4fb9b.0;received=$sipwise_ip;rport=5060.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bK4lTM1aQJ;rport=5080.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
From: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
To: <sip:$called_number@$asterisk_ip>;tag=as79cf42e4.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
CSeq: 10 INVITE.
Server: Asterisk PBX 1.8.24.0.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Session-Expires: 1800;refresher=uas.
Contact: <sip:$called_number@$asterisk_ip:5060>.
Content-Type: application/sdp.
Require: timer.
Content-Length: 233.
.
v=0.
o=root 616138497 616138497 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35512 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.

T $sipwise_ip:5060 -> $caller_ip:44972 [AP]
SIP/2.0 200 OK.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=ac2fd977;did=80d.6e2;mpd=ii;ice_caller=strip;ice_callee=strip;rtpprx=yes;vsf=eXpVZEk9MSk6AQYMNkJ1WXpqcEp5elVkRXhoaWdGa0s0RnJZelEEOBgUJhQqChxUMwU7>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=ac2fd977;nat=yes;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Record-Route: <sip:$sipwise_ip;transport=tcp;r2=on;lr=on;ftag=ac2fd977;nat=yes;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Via: SIP/2.0/TCP 10.10.10.56:5060;rport=44972;received=$caller_ip;branch=z9hG4bK-d8754z-16d76a817647c970-1---d8754z-.
To: <sip:$called_number@$sip-domain;transport=TCP>;tag=0504051D-5306F99B00089B1C-E0A92700.
From: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
CSeq: 2 INVITE.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Require: timer.
Content-Type: application/sdp.
Content-Length: 247.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.
v=0.
o=root 616138497 616138497 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35508 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.
a=rtcp:35509.

T $caller_ip:44972 -> $sipwise_ip:5060 [AP]
ACK sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA SIP/2.0.
Via: SIP/2.0/TCP 10.10.10.56:5060;branch=z9hG4bK-d8754z-a542e2d2434bb3ab-1---d8754z-.
Max-Forwards: 70.
Route: <sip:$sipwise_ip;transport=tcp;r2=on;lr=on;ftag=ac2fd977;nat=yes;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Route: <sip:192.168.2.2;r2=on;lr=on;ftag=ac2fd977;nat=yes;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Route: <sip:192.168.2.2:5062;lr=on;ftag=ac2fd977;did=80d.6e2;mpd=ii;ice_caller=strip;ice_callee=strip;rtpprx=yes;vsf=eXpVZEk9MSk6AQYMNkJ1WXpqcEp5elVkRXhoaWdGa0s0RnJZelEEOBgUJhQqChxUMwU7>.
Contact: <sip:$username@$caller_ip:5060;transport=TCP>.
To: <sip:$called_number@$sip-domain;transport=TCP>;tag=0504051D-5306F99B00089B1C-E0A92700.
From: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
CSeq: 2 ACK.
Proxy-Authorization: Digest username="$username",realm="$sip-domain",nonce="Uwb6x1MG+ZvedPvibEBt8SgoCS+RpNQf",uri="sip:$called_number@$sip-domain;transport=TCP",response="bed139da3effeee93084dae2f29f2dba",algorithm=MD5.
User-Agent: Zoiper r21999.
Content-Length: 0.
.

U $sipwise_ip:5060 -> $asterisk_ip:5060
ACK sip:$called_number@$asterisk_ip:5060 SIP/2.0.
Max-Forwards: 10.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bKdd75.3819ae5381ac046d4aeb918ad5e16a93.0.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKJ0BLDamt;rport=5080.
From: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
To: <sip:$called_number@$asterisk_ip>;tag=as79cf42e4.
CSeq: 10 ACK.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
User-Agent: Zoiper r21999.
Content-Length: 0.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.

T $caller_ip:44972 -> $sipwise_ip:5060 [AP]
ACK sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA SIP/2.0.
Via: SIP/2.0/TCP 10.10.10.56:5060;branch=z9hG4bK-d8754z-a542e2d2434bb3ab-1---d8754z-.
Max-Forwards: 70.
Route: <sip:$sipwise_ip;transport=tcp;lr;r2=on;ftag=ac2fd977;nat=yes;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Route: <sip:192.168.2.2;r2=on;lr=on;ftag=ac2fd977;nat=yes;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Route: <sip:192.168.2.2:5062;lr=on;ftag=ac2fd977;did=80d.6e2;mpd=ii;ice_caller=strip;ice_callee=strip;rtpprx=yes;vsf=eXpVZEk9MSk6AQYMNkJ1WXpqcEp5elVkRXhoaWdGa0s0RnJZelEEOBgUJhQqChxUMwU7>.
Contact: <sip:$username@$caller_ip:5060;transport=TCP>.
To: <sip:$called_number@$sip-domain;transport=TCP>;tag=0504051D-5306F99B00089B1C-E0A92700.
From: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
CSeq: 2 ACK.
Proxy-Authorization: Digest username="$username",realm="$sip-domain",nonce="Uwb6x1MG+ZvedPvibEBt8SgoCS+RpNQf",uri="sip:$called_number@$sip-domain;transport=TCP",response="bed139da3effeee93084dae2f29f2dba",algorithm=MD5.
User-Agent: Zoiper r21999.
Content-Length: 0.
.

U $called_ip:5060 -> $sipwise_ip:5060
BYE sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA SIP/2.0.
CSeq: 1 BYE.
From: <sip:$username_B@$sip-domain>;tag=e76e9ae7.
To: <sip:$caller_number@$sip-domain>;tag=5180DD30-5306F99B000A09EE-E149C700.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060_b2b-1.
Max-Forwards: 70.
Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>,<sip:192.168.2.2;r2=on;lr=on;ftag=5180DD30-5306F99B000A09EE-E149C700;ngcplb=yes;socket=sip:$sipwise_ip:5060>.
Via: SIP/2.0/UDP 192.168.3.169:5060;branch=z9hG4bK-3637-08cf3fbf6a76c58f94790e83a4aedc90.
Contact: "$username_B" <sip:$username_B at 192.168.3.169:5060;transport=udp;registering_acc=sip_internet-phone_ro>.
User-Agent: Jitsi2.4.4997Windows 7.
Content-Length: 0.
.

U $sipwise_ip:5060 -> $called_ip:5060
SIP/2.0 200 OK.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=e76e9ae7;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=e76e9ae7;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
CSeq: 1 BYE.
From: <sip:$username_B@$sip-domain>;tag=e76e9ae7.
To: <sip:$caller_number@$sip-domain>;tag=5180DD30-5306F99B000A09EE-E149C700.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060_b2b-1.
Via: SIP/2.0/UDP 192.168.3.169:5060;rport=5060;received=$called_ip;branch=z9hG4bK-3637-08cf3fbf6a76c58f94790e83a4aedc90.
Server: Sipwise NGCP Application Server.
Content-Length: 0.
.

U $sipwise_ip:5060 -> $asterisk_ip:5060
BYE sip:4$caller_number@$asterisk_ip:5060 SIP/2.0.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=527BF807-5306F99B000A0948-E0B93700;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=527BF807-5306F99B000A0948-E0B93700;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Max-Forwards:  9.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=527BF807-5306F99B000A0948-E0B93700;rtpprx=yes>.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bKa344.8c379671728ca038ade4ad49d775387c.0.
Via: SIP/2.0/UDP 192.168.2.2:5062;rport=5062;branch=z9hG4bKa344.ec886ddd651d5f44694ccd337dac5595.0.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKkHCaya1T;rport=5080.
From: <sip:$called_number@$sipwise_ip>;tag=527BF807-5306F99B000A0948-E0B93700.
To: <sip:4$caller_number@$asterisk_ip>;tag=as176d378e.
CSeq: 10 BYE.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060.
Content-Length: 0.
.

U $asterisk_ip:5060 -> $sipwise_ip:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP $sipwise_ip;branch=z9hG4bKa344.8c379671728ca038ade4ad49d775387c.0;received=$sipwise_ip;rport=5060.
Via: SIP/2.0/UDP 192.168.2.2:5062;rport=5062;branch=z9hG4bKa344.ec886ddd651d5f44694ccd337dac5595.0.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKkHCaya1T;rport=5080.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=527BF807-5306F99B000A0948-E0B93700;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=527BF807-5306F99B000A0948-E0B93700;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=527BF807-5306F99B000A0948-E0B93700;rtpprx=yes>.
From: <sip:$called_number@$sipwise_ip>;tag=527BF807-5306F99B000A0948-E0B93700.
To: <sip:4$caller_number@$asterisk_ip>;tag=as176d378e.
Call-ID: 2db1406736879ea015352f992fb29e91@$asterisk_ip:5060.
CSeq: 10 BYE.
Server: Asterisk PBX 1.8.24.0.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Length: 0.
.

U $asterisk_ip:5060 -> $sipwise_ip:5060
INVITE sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA SIP/2.0.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK4e42b1a3;rport.
Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>,<sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Max-Forwards: 70.
From: <sip:$called_number@$asterisk_ip>;tag=as79cf42e4.
To: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
Contact: <sip:$called_number@$asterisk_ip:5060>.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
CSeq: 102 INVITE.
User-Agent: Asterisk PBX 1.8.24.0.
Session-Expires: 1800;refresher=uac.
Min-SE: 90.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 237.
.
v=0.
o=root 616138497 616138498 IN IP4 $asterisk_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $asterisk_ip.
t=0 0.
m=audio 18322 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.

Invite sent by Sipwise with large mtu => gets fragmented

T $sipwise_ip:5060 -> $caller_ip:44972 [A]
INVITE sip:$username@$caller_ip:5060;transport=TCP SIP/2.0.
Record-Route: <sip:$sipwise_ip;transport=tcp;r2=on;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Max-Forwards:  9.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;rtpprx=yes;ice_caller=strip;ice_callee=strip;mpd=ii>.
Via: SIP/2.0/TCP $sipwise_ip;branch=z9hG4bK7248.04ce9e5778b2812bc6f400e5670edb42.0.
Via: SIP/2.0/UDP 192.168.2.2:5062;rport=5062;branch=z9hG4bK7248.a2cbe2485b0621e682556f727cc39bfb.0.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKi.hV.a9i;rport=5080.
From: <sip:$called_number@$sip-domain;transport=TCP>;tag=0504051D-5306F99B00089B1C-E0A92700.
To: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
CSeq: 10 INVITE.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
User-Agent: Asterisk PBX 1.8.24.0.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 267.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.
v=0.
o=root 616138497 616138498 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35514 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmt

U $asterisk_ip:5060 -> $sipwise_ip:5060
INVITE sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA SIP/2.0.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK4e42b1a3;rport.
Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>,<sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Max-Forwards: 70.
From: <sip:$called_number@$asterisk_ip>;tag=as79cf42e4.
To: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
Contact: <sip:$called_number@$asterisk_ip:5060>.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
CSeq: 102 INVITE.
User-Agent: Asterisk PBX 1.8.24.0.
Session-Expires: 1800;refresher=uac.
Min-SE: 90.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 237.
.
v=0.
o=root 616138497 616138498 IN IP4 $asterisk_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $asterisk_ip.
t=0 0.
m=audio 18322 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.

--------------re-invite issued from Sipwise to uac, fragmented 

T $sipwise_ip:5060 -> $caller_ip:44972 [A]
INVITE sip:$username@$caller_ip:5060;transport=TCP SIP/2.0.
Record-Route: <sip:$sipwise_ip;transport=tcp;r2=on;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Max-Forwards:  9.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;rtpprx=yes;ice_caller=strip;ice_callee=strip;mpd=ii>.
Via: SIP/2.0/TCP $sipwise_ip;branch=z9hG4bK7248.04ce9e5778b2812bc6f400e5670edb42.0.
Via: SIP/2.0/UDP 192.168.2.2:5062;rport=5062;branch=z9hG4bK7248.a2cbe2485b0621e682556f727cc39bfb.0.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKi.hV.a9i;rport=5080.
From: <sip:$called_number@$sip-domain;transport=TCP>;tag=0504051D-5306F99B00089B1C-E0A92700.
To: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
CSeq: 10 INVITE.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
User-Agent: Asterisk PBX 1.8.24.0.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 267.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.
v=0.
o=root 616138497 616138498 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35514 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmt

U $asterisk_ip:5060 -> $sipwise_ip:5060
INVITE sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA SIP/2.0.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK4e42b1a3;rport.
Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>,<sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Max-Forwards: 70.
From: <sip:$called_number@$asterisk_ip>;tag=as79cf42e4.
To: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
Contact: <sip:$called_number@$asterisk_ip:5060>.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
CSeq: 102 INVITE.
User-Agent: Asterisk PBX 1.8.24.0.
Session-Expires: 1800;refresher=uac.
Min-SE: 90.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 237.
.
v=0.
o=root 616138497 616138498 IN IP4 $asterisk_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $asterisk_ip.
t=0 0.
m=audio 18322 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.

T $sipwise_ip:5060 -> $caller_ip:44972 [A]
INVITE sip:$username@$caller_ip:5060;transport=TCP SIP/2.0.
Record-Route: <sip:$sipwise_ip;transport=tcp;r2=on;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Max-Forwards:  9.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;rtpprx=yes;ice_caller=strip;ice_callee=strip;mpd=ii>.
Via: SIP/2.0/TCP $sipwise_ip;branch=z9hG4bK7248.04ce9e5778b2812bc6f400e5670edb42.0.
Via: SIP/2.0/UDP 192.168.2.2:5062;rport=5062;branch=z9hG4bK7248.a2cbe2485b0621e682556f727cc39bfb.0.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKi.hV.a9i;rport=5080.
From: <sip:$called_number@$sip-domain;transport=TCP>;tag=0504051D-5306F99B00089B1C-E0A92700.
To: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
CSeq: 10 INVITE.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
User-Agent: Asterisk PBX 1.8.24.0.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 267.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.
v=0.
o=root 616138497 616138498 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35514 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmt

U $asterisk_ip:5060 -> $sipwise_ip:5060
INVITE sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA SIP/2.0.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK4e42b1a3;rport.
Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>,<sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Max-Forwards: 70.
From: <sip:$called_number@$asterisk_ip>;tag=as79cf42e4.
To: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
Contact: <sip:$called_number@$asterisk_ip:5060>.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
CSeq: 102 INVITE.
User-Agent: Asterisk PBX 1.8.24.0.
Session-Expires: 1800;refresher=uac.
Min-SE: 90.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 237.
.
v=0.
o=root 616138497 616138498 IN IP4 $asterisk_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $asterisk_ip.
t=0 0.
m=audio 18322 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.

T $sipwise_ip:5060 -> $caller_ip:44972 [A]
INVITE sip:$username@$caller_ip:5060;transport=TCP SIP/2.0.
Record-Route: <sip:$sipwise_ip;transport=tcp;r2=on;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Max-Forwards:  9.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;rtpprx=yes;ice_caller=strip;ice_callee=strip;mpd=ii>.
Via: SIP/2.0/TCP $sipwise_ip;branch=z9hG4bK7248.04ce9e5778b2812bc6f400e5670edb42.0.
Via: SIP/2.0/UDP 192.168.2.2:5062;rport=5062;branch=z9hG4bK7248.a2cbe2485b0621e682556f727cc39bfb.0.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKi.hV.a9i;rport=5080.
From: <sip:$called_number@$sip-domain;transport=TCP>;tag=0504051D-5306F99B00089B1C-E0A92700.
To: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
CSeq: 10 INVITE.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
User-Agent: Asterisk PBX 1.8.24.0.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 267.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.
v=0.
o=root 616138497 616138498 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35514 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmt

U $asterisk_ip:5060 -> $sipwise_ip:5060
INVITE sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA SIP/2.0.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK4e42b1a3;rport.
Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>,<sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Max-Forwards: 70.
From: <sip:$called_number@$asterisk_ip>;tag=as79cf42e4.
To: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
Contact: <sip:$called_number@$asterisk_ip:5060>.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
CSeq: 102 INVITE.
User-Agent: Asterisk PBX 1.8.24.0.
Session-Expires: 1800;refresher=uac.
Min-SE: 90.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 237.
.
v=0.
o=root 616138497 616138498 IN IP4 $asterisk_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $asterisk_ip.
t=0 0.
m=audio 18322 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.

U $asterisk_ip:5060 -> $sipwise_ip:5060
BYE sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA SIP/2.0.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK71a0b665;rport.
Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>,<sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Max-Forwards: 70.
From: <sip:$called_number@$asterisk_ip>;tag=as79cf42e4.
To: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
CSeq: 103 BYE.
User-Agent: Asterisk PBX 1.8.24.0.
X-Asterisk-HangupCause: Normal Clearing.
X-Asterisk-HangupCauseCode: 16.
Content-Length: 0.
.

U $sipwise_ip:5060 -> $asterisk_ip:5060
SIP/2.0 200 OK.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=as79cf42e4;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Record-Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=as79cf42e4;nat=yes;ngcplb=yes;socket=udp:$sipwise_ip:5060>.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK71a0b665;rport=5060.
From: <sip:$called_number@$asterisk_ip>;tag=as79cf42e4.
To: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
CSeq: 103 BYE.
Server: Sipwise NGCP Application Server.
Content-Length: 0.
.

U $asterisk_ip:5060 -> $sipwise_ip:5060
INVITE sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA SIP/2.0.
Via: SIP/2.0/UDP $asterisk_ip:5060;branch=z9hG4bK4e42b1a3;rport.
Route: <sip:$sipwise_ip;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>,<sip:192.168.2.2;r2=on;lr=on;ftag=05777DF4-5306F99B00089BCB-E169E700;ngcplb=yes>.
Max-Forwards: 70.
From: <sip:$called_number@$asterisk_ip>;tag=as79cf42e4.
To: <sip:4$caller_number@$sip-domain>;tag=05777DF4-5306F99B00089BCB-E169E700.
Contact: <sip:$called_number@$asterisk_ip:5060>.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI._b2b-1.
CSeq: 102 INVITE.
User-Agent: Asterisk PBX 1.8.24.0.
Session-Expires: 1800;refresher=uac.
Min-SE: 90.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 237.
.
v=0.
o=root 616138497 616138498 IN IP4 $asterisk_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $asterisk_ip.
t=0 0.
m=audio 18322 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-16.
a=ptime:20.
a=sendrecv.

T $sipwise_ip:5060 -> $caller_ip:44972 [A]
INVITE sip:$username@$caller_ip:5060;transport=TCP SIP/2.0.
Record-Route: <sip:$sipwise_ip;transport=tcp;r2=on;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Max-Forwards:  9.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=0504051D-5306F99B00089B1C-E0A92700;rtpprx=yes;ice_caller=strip;ice_callee=strip;mpd=ii>.
Via: SIP/2.0/TCP $sipwise_ip;branch=z9hG4bK7248.04ce9e5778b2812bc6f400e5670edb42.0.
Via: SIP/2.0/UDP 192.168.2.2:5062;rport=5062;branch=z9hG4bK7248.a2cbe2485b0621e682556f727cc39bfb.0.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bKi.hV.a9i;rport=5080.
From: <sip:$called_number@$sip-domain;transport=TCP>;tag=0504051D-5306F99B00089B1C-E0A92700.
To: <sip:$username@$sip-domain;transport=TCP>;tag=ac2fd977.
CSeq: 10 INVITE.
Call-ID: MDE5YjRmYjA2YzgzOWJkNDg1NzExMDNlMjk0ZmFkMjI..
User-Agent: Asterisk PBX 1.8.24.0.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 267.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.
v=0.
o=root 616138497 616138498 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35514 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmt

T $sipwise_ip:5060 -> $caller_ip:45801 [A]
INVITE sip:$username at 10.10.10.56:5060;transport=TCP SIP/2.0.
Record-Route: <sip:$sipwise_ip;transport=tcp;r2=on;lr=on;ftag=2763EC27-5306F8670005569B-E0C94700;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Record-Route: <sip:192.168.2.2;r2=on;lr=on;ftag=2763EC27-5306F8670005569B-E0C94700;ngcplb=yes;socket=tcp:$sipwise_ip:5060>.
Max-Forwards:  9.
Record-Route: <sip:192.168.2.2:5062;lr=on;ftag=2763EC27-5306F8670005569B-E0C94700;rtpprx=yes;ice_caller=strip;ice_callee=strip;mpd=ii>.
Via: SIP/2.0/TCP $sipwise_ip;branch=z9hG4bK298.35ce9bff0625724785c2cf19c6c7d3d2.0.
Via: SIP/2.0/UDP 192.168.2.2:5062;rport=5062;branch=z9hG4bK298.6f6a0021e2b39c4c9355faa2cebf9486.0.
Via: SIP/2.0/UDP 192.168.2.2:5080;branch=z9hG4bK.fHvdaIa;rport=5080.
From: <sip:$called_number@$sip-domain;transport=TCP>;tag=2763EC27-5306F8670005569B-E0C94700.
To: <sip:$username@$sip-domain;transport=TCP>;tag=7f3b7459.
CSeq: 10 INVITE.
Call-ID: NzE5OWFmY2QzYTAxZTA0NTYwYjc1NGQxNzM0YjE0ZmQ..
User-Agent: Asterisk PBX 1.8.24.0.
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH.
Supported: replaces, timer.
Content-Type: application/sdp.
Content-Length: 269.
Contact: <sip:ngcp-lb@$sipwise_ip:5060;ngcpct=c2lwOjE5Mi4xNjguMi4yOjUwODA>.
.
v=0.
o=root 1213325023 1213325024 IN IP4 $sipwise_ip.
s=Asterisk PBX 1.8.24.0.
c=IN IP4 $sipwise_ip.
t=0 0.
m=audio 35502 RTP/AVP 8 101.
a=rtpmap:8 PCMA/8000.
a=rtpmap:101 telephone-event/8000.
a=fmt
^Croot at kamailio:~#
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