Re: [SR-Users] "ACK not received"

25 May 2011

Alex,

If I contact the calling UA 91.121.81.212 and give him my server ip
address and ask him to send me an ACK, he shouldn't have any problems
fulfilling my request? Since I am just testing, is this the best
approach when contacting another provider or is there another formal
way to do it?

Thanks,

On Wed, May 25, 2011 at 8:32 PM, Alex Balashov
&lt;abalashov(a)evaristesys.com&gt; wrote:
...
  This kind of ACK is end-to-end, not hop-by-hop, so it
should be sent by the calling UA (and correctly forwarded by Kamailio).

 --
 Alex Balashov - Principal
 Evariste Systems LLC
 260 Peachtree Street NW
 Suite 2200
 Atlanta, GA 30303
 Tel: +1-678-954-0670
 Fax: +1-404-961-1892
 Web: http://www.evaristesys.com/

 On May 25, 2011, at 9:18 PM, Mokhtar Bengana &lt;mokhtar.bengana(a)gmail.com&gt; wrote:

  I am trying to forward a DID to a sip account
registered to Kamailio.
 The call get established with two way audio and Kamailio shows it's
 comming from an Asterisk server. However the call get disconnected
 each time after 31s. Ngrep is showing "ACK not received" by the
 Kamailio test account before the call get disconnected. If Kamailio is
 suppose to send an ACK back to the asterisk server to keep the call
 up, I am not sure why it's not happening. Or is it the other way
 around? I have included the ngrep output. I appreciate any help.

 U 2011/05/26 00:27:12.525344 91.121.81.212:5060 -> 192.168.2.4:5060
 INVITE sip:test@sipsoft.dyndns.org SIP/2.0.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 From: "3313144859493" <sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 To: <sip:33980307151@sip.antisip.com:5060>.
 Contact: <sip:3313144859493@188.165.98.47:5060>.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 User-Agent: Asterisk PBX.
 Max-Forwards: 69.
 Date: Thu, 26 May 2011 00:27:10 GMT.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO.
 Supported: replaces.
 Content-Type: application/sdp.
 Content-Length: 260.
 P-Antisip: forwarded with alias.
 P-PMR: mediarelay enabled.
 .
 v=0.
 o=root 10502 10502 IN IP4 91.121.81.212.
 s=session.
 c=IN IP4 91.121.81.212.
 t=0 0.
 m=audio 41316 RTP/AVP 8 101.
 a=rtpmap:8 PCMA/8000.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-16.
 a=silenceSupp:off - - - -.
 a=ptime:20.
 a=sendrecv.
 a=nortpproxy:yes.

 U 2011/05/26 00:27:12.526734 192.168.2.4:5060 -> 91.121.81.212:5060
 SIP/2.0 100 trying -- your call is important to us.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 From: "3313144859493" <sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 To: <sip:33980307151@sip.antisip.com:5060>.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Server: kamailio (3.1.3 (x86_64/linux)).
 Content-Length: 0.
 .

 U 2011/05/26 00:27:12.527013 192.168.2.4:5060 -> 192.168.2.8:65412
 INVITE sip:test@192.168.2.8:65412;rinstance=befda46036a026ac SIP/2.0.
 Record-Route: <sip:192.168.2.4;lr=on>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK33ad.55f7f307.0.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 From: "3313144859493" <sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 To: <sip:33980307151@sip.antisip.com:5060>.
 Contact: <sip:3313144859493@188.165.98.47:5060>.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 User-Agent: Asterisk PBX.
 Max-Forwards: 68.
 Date: Thu, 26 May 2011 00:27:10 GMT.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO.
 Supported: replaces.
 Content-Type: application/sdp.
 Content-Length: 260.
 P-Antisip: forwarded with alias.
 P-PMR: mediarelay enabled.
 .
 v=0.
 o=root 10502 10502 IN IP4 91.121.81.212.
 s=session.
 c=IN IP4 91.121.81.212.
 t=0 0.
 m=audio 41316 RTP/AVP 8 101.
 a=rtpmap:8 PCMA/8000.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-16.
 a=silenceSupp:off - - - -.
 a=ptime:20.
 a=sendrecv.
 a=nortpproxy:yes.

 U 2011/05/26 00:27:12.601815 192.168.2.8:65412 -> 192.168.2.4:5060
 SIP/2.0 180 Ringing.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK33ad.55f7f307.0.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 0.
 .

 U 2011/05/26 00:27:12.601967 192.168.2.4:5060 -> 91.121.81.212:5060
 SIP/2.0 180 Ringing.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 0.
 .

 U 2011/05/26 00:27:22.568944 192.168.2.8:65412 -> 192.168.2.4:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK33ad.55f7f307.0.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:22.569043 192.168.2.4:5060 -> 91.121.81.212:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:23.080398 192.168.2.8:65412 -> 192.168.2.4:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK33ad.55f7f307.0.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:23.080549 192.168.2.4:5060 -> 91.121.81.212:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:24.080628 192.168.2.8:65412 -> 192.168.2.4:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK33ad.55f7f307.0.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:24.080697 192.168.2.4:5060 -> 91.121.81.212:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:26.080654 192.168.2.8:65412 -> 192.168.2.4:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK33ad.55f7f307.0.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:26.080816 192.168.2.4:5060 -> 91.121.81.212:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:30.080527 192.168.2.8:65412 -> 192.168.2.4:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK33ad.55f7f307.0.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:30.080594 192.168.2.4:5060 -> 91.121.81.212:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:34.080318 192.168.2.8:65412 -> 192.168.2.4:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK33ad.55f7f307.0.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:34.080436 192.168.2.4:5060 -> 91.121.81.212:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:37.137775 192.168.2.8:65412 -> 192.168.2.4:5060
 .
 .

 U 2011/05/26 00:27:38.081552 192.168.2.8:65412 -> 192.168.2.4:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK33ad.55f7f307.0.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:38.081707 192.168.2.4:5060 -> 91.121.81.212:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:42.082163 192.168.2.8:65412 -> 192.168.2.4:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK33ad.55f7f307.0.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:42.082308 192.168.2.4:5060 -> 91.121.81.212:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:46.080414 192.168.2.8:65412 -> 192.168.2.4:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK33ad.55f7f307.0.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:46.080562 192.168.2.4:5060 -> 91.121.81.212:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:50.082011 192.168.2.8:65412 -> 192.168.2.4:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK33ad.55f7f307.0.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:50.082142 192.168.2.4:5060 -> 91.121.81.212:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:54.080488 192.168.2.8:65412 -> 192.168.2.4:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK33ad.55f7f307.0.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:54.080592 192.168.2.4:5060 -> 91.121.81.212:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP 91.121.81.212;branch=z9hG4bK33ad.da5ada05.0.
 Via: SIP/2.0/UDP 188.165.98.47:5060;branch=z9hG4bK60ba8b25;rport=5060.
 Record-Route: <sip:192.168.2.4;lr>.
 Record-Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 From: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 102 INVITE.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE,
 SUBSCRIBE, INFO.
 Content-Type: application/sdp.
 Supported: replaces.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Content-Length: 371.
 .
 v=0.
 o=- 12950843244293000 1 IN IP4 192.168.2.8.
 s=CounterPath X-Lite 4.0.
 c=IN IP4 192.168.2.8.
 t=0 0.
 a=ice-ufrag:b5d539.
 a=ice-pwd:00ac4defa17299dce44e27bf54408a4c.
 m=audio 54492 RTP/AVP 8 101.
 a=rtpmap:101 telephone-event/8000.
 a=fmtp:101 0-15.
 a=sendrecv.
 a=candidate:1 1 UDP 659136 192.168.2.8 54492 typ host.
 a=candidate:1 2 UDP 659134 192.168.2.8 54493 typ host.

 U 2011/05/26 00:27:54.574347 192.168.2.8:65412 -> 192.168.2.4:5060
 BYE sip:3313144859493@188.165.98.47:5060 SIP/2.0.
 Via: SIP/2.0/UDP
 192.168.2.8:65412;branch=z9hG4bK-d8754z-6e34d343af083241-1---d8754z-;rport.
 Max-Forwards: 70.
 Route: <sip:192.168.2.4;lr>.
 Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 From: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 2 BYE.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Reason: SIP;description="ACK not received".
 Content-Length: 0.
 .

 U 2011/05/26 00:27:54.574553 192.168.2.4:5060 -> 91.121.81.212:5060
 BYE sip:3313144859493@188.165.98.47:5060 SIP/2.0.
 Via: SIP/2.0/UDP 192.168.2.4;branch=z9hG4bK79bb.32809f01.0.
 Via: SIP/2.0/UDP
 192.168.2.8:65412;branch=z9hG4bK-d8754z-6e34d343af083241-1---d8754z-;rport=65412.
 Max-Forwards: 69.
 Route: <sip:91.121.81.212;lr;mr=yes>.
 Contact: <sip:test@192.168.2.8:65412;rinstance=befda46036a026ac>.
 To: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 From: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 2 BYE.
 User-Agent: X-Lite 4 release 4.0 stamp 58832.
 Reason: SIP;description="ACK not received".
 Content-Length: 0.
 .

 U 2011/05/26 00:27:54.705228 91.121.81.212:5060 -> 192.168.2.4:5060
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP
 192.168.2.4;rport=5060;received=99.42.204.9;branch=z9hG4bK79bb.32809f01.0.
 Via: SIP/2.0/UDP
 192.168.2.8:65412;branch=z9hG4bK-d8754z-6e34d343af083241-1---d8754z-;rport=65412.
 Record-Route: <sip:91.121.81.212;lr>.
 From: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 To: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 2 BYE.
 User-Agent: Asterisk PBX.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO.
 Supported: replaces.
 Content-Length: 0.
 .

 U 2011/05/26 00:27:54.705377 192.168.2.4:5060 -> 192.168.2.8:65412
 SIP/2.0 200 OK.
 Via: SIP/2.0/UDP
 192.168.2.8:65412;branch=z9hG4bK-d8754z-6e34d343af083241-1---d8754z-;rport=65412.
 Record-Route: <sip:91.121.81.212;lr>.
 From: <sip:33980307151@sip.antisip.com:5060>;tag=1df26a5d.
 To: "3313144859493"<sip:3313144859493@188.165.98.47>;tag=as6c63c119.
 Call-ID: 5e5ba375661c69273f32a463764879b0(a)188.165.98.47.
 CSeq: 2 BYE.
 User-Agent: Asterisk PBX.
 Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO.
 Supported: replaces.
 Content-Length: 0.
 .

 U 2011/05/26 00:28:07.139142 192.168.2.8:65412 -> 192.168.2.4:5060
 .
 .

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 sr-users(a)lists.sip-router.org
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 _______________________________________________
 SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
 sr-users(a)lists.sip-router.org
 http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users

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Re: [SR-Users] "ACK not received"