[OpenSER-Users] Missing RTP stream

Thu Sep 20 22:47:25 CEST 2007

Hi Morten,

Admittedly, I haven't looked closely at your trace.  However, based on
the description you gave, the first place to look is at the "canrevite"
setting in Asterisk sip.conf.  You might want to try "canreinvite=no"
after reading up on this particular setting.

Regards,
Norm

Morten Isaksen wrote:
> Hi!
>
> I have a strange problem with a missing RTP stream between OpenSER and
> Asterisk. I am not sure if it is OpenSER og Asterisk related.
>
> I have this setup
>
> Phone A (172.17.96.17) --
>                                       \      Openser    --    Asterisk
>       --    PSTN
>                                       /      (192.168.0.6)   (192.168.0.3)
> Phone B (172.17.96.10) --        (172.17.64.1)
>
> I also have a Mediaproxy running on OpenSER and I force every call to
> use the Mediaproxy.
>
> I call from Phone A or B to the PSTN works fine and from PSTN to Phone
> A or B it also works.
>
> I have the dialplan logic on my Asterisk server so I want calls from
> Phone A to Phone B to pass the Asterisk server. And this is were I
> have the problem. When the call is established the RTP stream is
> missing between Mediaproxy and Asterisk. I only have a RTP stream
> between the phones and Mediaproxy. As far as I can see the SIP
> signalling is correct.
>
> The SIP traces is listed below. Can you spot the problem in this?
>
> I will buy a beer (or 5) at OpenSER training in Rome to anyone who can
> help me solve this problem.
>
> SIP trace between the phones and OpenSER:
>
> U 172.17.96.17:5060 -> 172.17.64.1:5060
> INVITE sip:43336000 at 172.17.64.1:5060;transport=UDP SIP/2.0.
> From: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> To: "43336000"<sip:43336000 at 172.17.64.1:5060>.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 1 INVITE.
> Via: SIP/2.0/UDP
> 172.17.96.17:5060;rport;branch=z9hG4bK-3e125d63-77bccac7-4b008a75.
> Max-Forwards: 70.
> Supported: replaces,100rel.
> Allow: INVITE, ACK, BYE, REFER, NOTIFY, CANCEL.
> Contact: <sip:081701 at 172.17.96.17:5060;transport=UDP>.
> Content-Type: application/sdp.
> Content-Length: 366.
> .
> v=0.
> o=081701 1041391881 1041391881 IN IP4 172.17.96.17.
> s=-.
> c=IN IP4 172.17.96.17.
> t=0 0.
> m=audio 10000 RTP/AVP 8 8 18 4 98 2 101.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:18 G729/8000.
> a=rtpmap:4 g723/8000.
> a=rtpmap:98 g726-16/8000.
> a=rtpmap:2 g726-32/8000.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:18 annexb=no.
> a=fmtp:4 annexa=no.
> a=fmtp:101 0-15.
>
> #
> U 172.17.64.1:5060 -> 172.17.96.17:5060
> SIP/2.0 407 Proxy Authentication Required.
> From: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> To: "43336000"<sip:43336000 at 172.17.64.1:5060>;tag=e7a9ec63e83496804ae077e38a2ef69c.8352.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 1 INVITE.
> Via: SIP/2.0/UDP
> 172.17.96.17:5060;rport=5060;branch=z9hG4bK-3e125d63-77bccac7-4b008a75.
> Proxy-Authenticate: Digest realm="172.17.96.17",
> nonce="46f2861ed3a501550cd33c28b12936d24c42199c".
> Server: OpenSer (1.1.0-notls (i386/linux)).
> Content-Length: 0.
> Warning: 392 172.17.64.1:5060 "Noisy feedback tells:  pid=15649
> req_src_ip=172.17.96.17 req_src_port=5060
> in_uri=sip:43336000 at 172.17.64.1:5060;transport=UDP
> out_uri=sip:43336000 at 172.17.64.1:5060;transport=UDP via_cnt==1".
> .
>
> #
> U 172.17.96.17:5060 -> 172.17.64.1:5060
> ACK sip:43336000 at 172.17.64.1:5060;transport=UDP SIP/2.0.
> From: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> To: "43336000"<sip:43336000 at 172.17.64.1:5060>;tag=e7a9ec63e83496804ae077e38a2ef69c.8352.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 1 ACK.
> Via: SIP/2.0/UDP
> 172.17.96.17:5060;rport;branch=z9hG4bK-3e125d63-77bccac7-4b008a75.
> Max-Forwards: 70.
> Contact: <sip:081701 at 172.17.96.17:5060;transport=UDP>.
> Content-Length: 0.
> .
>
> #
> U 172.17.96.17:5060 -> 172.17.64.1:5060
> INVITE sip:43336000 at 172.17.64.1:5060;transport=UDP SIP/2.0.
> From: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> To: "43336000"<sip:43336000 at 172.17.64.1:5060>.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 2 INVITE.
> Via: SIP/2.0/UDP
> 172.17.96.17:5060;rport;branch=z9hG4bK-3e125d63-77bccb03-1bf1c302.
> Max-Forwards: 70.
> Supported: replaces,100rel.
> Allow: INVITE, ACK, BYE, REFER, NOTIFY, CANCEL.
> Contact: <sip:081701 at 172.17.96.17:5060;transport=UDP>.
> Proxy-Authorization: Digest
> username="081701",realm="172.17.96.17",nonce="46f2861ed3a501550cd33c28b12936d24c42199c",uri="sip:43336000 at 172.17.64.1:5060;transport=UDP",response="4bf0194044fb4a759ec6134d68bef752",algorithm=MD5.
> Content-Type: application/sdp.
> Content-Length: 366.
> .
> v=0.
> o=081701 1041391881 1041391881 IN IP4 172.17.96.17.
> s=-.
> c=IN IP4 172.17.96.17.
> t=0 0.
> m=audio 10000 RTP/AVP 8 8 18 4 98 2 101.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:18 G729/8000.
> a=rtpmap:4 g723/8000.
> a=rtpmap:98 g726-16/8000.
> a=rtpmap:2 g726-32/8000.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:18 annexb=no.
> a=fmtp:4 annexa=no.
> a=fmtp:101 0-15.
>
> #
> U 172.17.64.1:5060 -> 172.17.96.17:5060
> SIP/2.0 100 Trying.
> Via: SIP/2.0/UDP
> 172.17.96.17:5060;rport=5060;branch=z9hG4bK-3e125d63-77bccb03-1bf1c302.
> From: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> To: "43336000"<sip:43336000 at 172.17.64.1:5060>.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 2 INVITE.
> User-Agent: Asterisk PBX.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
> Max-Forwards: 70.
> Contact: <sip:43336000 at 192.168.0.3:5060>.
> Content-Length: 0.
> .
>
>
> #
> U 172.17.64.1:5060 -> 172.17.96.10:5060
> INVITE sip:081700 at 172.17.96.10:5060;transport=UDP SIP/2.0.
> Record-Route: <sip:172.17.64.1;lr=on;ftag=as28ccd5e9>.
> Via: SIP/2.0/UDP 172.17.64.1;branch=z9hG4bKcf8.161cb842.1.
> Via: SIP/2.0/UDP 192.168.0.3:5060;branch=z9hG4bK6ab42128;rport=1265.
> From: "081701" <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> To: <sip:081700 at 172.17.64.1>.
> Contact: <sip:43336999 at 192.168.0.3:1265>.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 102 INVITE.
> User-Agent: Asterisk PBX.
> Max-Forwards: 69.
> Date: Thu, 20 Sep 2007 14:34:26 GMT.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
> Content-Type: application/sdp.
> Content-Length: 182.
> .
> v=0.
> o=root 21472 21472 IN IP4 192.168.0.3.
> s=session.
> c=IN IP4 172.17.64.1.
> t=0 0.
> m=audio 60024 RTP/AVP 8 0.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:0 PCMU/8000.
> a=silenceSupp:off - - - -.
>
> #
> U 172.17.64.1:5060 -> 172.17.96.17:5060
> SIP/2.0 180 Ringing.
> Via: SIP/2.0/UDP
> 172.17.96.17:5060;rport=5060;branch=z9hG4bK-3e125d63-77bccb03-1bf1c302.
> From: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> To: "43336000"<sip:43336000 at 172.17.64.1:5060>;tag=as119e7abe.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 2 INVITE.
> User-Agent: Asterisk PBX.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
> Max-Forwards: 70.
> Contact: <sip:43336000 at 192.168.0.3:5060>.
> Content-Length: 0.
> .
>
>
> #
> U 172.17.96.10:5060 -> 172.17.64.1:5060
> SIP/2.0 180 Ringing.
> User-Agent: ATI-iMG616RF+/3-5_78.
> Via: SIP/2.0/UDP 172.17.64.1;branch=z9hG4bKcf8.161cb842.1,SIP/2.0/UDP
> 192.168.0.3:5060;branch=z9hG4bK6ab42128;rport=1265.
> From: 081701 <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> To: <sip:081700 at 172.17.64.1>;tag=AAA5NwAN2ggCmwxx.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 102 INVITE.
> Supported: 100rel,replaces,timer.
> Content-Length: 0.
> .
>
> #
> U 172.17.96.10:5060 -> 172.17.64.1:5060
> SIP/2.0 200 OK.
> User-Agent: ATI-iMG616RF+/3-5_78.
> Via: SIP/2.0/UDP 172.17.64.1;branch=z9hG4bKcf8.161cb842.1,SIP/2.0/UDP
> 192.168.0.3:5060;branch=z9hG4bK6ab42128;rport=1265.
> From: 081701 <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> To: <sip:081700 at 172.17.64.1>;tag=AAA5NwAN2ggCmwxx.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 102 INVITE.
> Supported: 100rel,replaces,timer.
> Record-Route: <sip:172.17.64.1;lr;ftag=as28ccd5e9>.
> Contact: <sip:081700 at 172.17.96.10:5060;transport=UDP>.
> Content-Length: 171.
> Content-Type: application/sdp.
> .
> v=0.
> o=- 926679040 1 IN IP4 172.17.96.10.
> s=ATI-SIP Call.
> c=IN IP4 172.17.96.10.
> t=0 0.
> m=audio 50600 RTP/AVP 8 13.
> a=rtpmap:8 PCMA/8000.
> a=ptime:10.
> a=rtpmap:13 CN/8000.
>
> #
> U 172.17.64.1:5060 -> 172.17.96.12:5060
> CANCEL sip:081700 at 172.17.96.12:5060;transport=UDP SIP/2.0.
> Via: SIP/2.0/UDP 172.17.64.1;branch=z9hG4bKcf8.161cb842.0.
> From: "081701" <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> To: <sip:081700 at 172.17.64.1>.
> CSeq: 102 CANCEL.
> User-Agent: OpenSer (1.1.0-notls (i386/linux)).
> Content-Length: 0.
> .
>
> #
> U 172.17.64.1:5060 -> 172.17.96.10:5060
> ACK sip:081700 at 172.17.96.10:5060;transport=UDP SIP/2.0.
> Record-Route: <sip:172.17.64.1;lr=on;ftag=as28ccd5e9>.
> Via: SIP/2.0/UDP 172.17.64.1;branch=z9hG4bKcf8.161cb842.3.
> Via: SIP/2.0/UDP 192.168.0.3:5060;branch=z9hG4bK78618ac6;rport=1265.
> Route: <sip:172.17.64.1;lr;ftag=as28ccd5e9>.
> From: "081701" <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> To: <sip:081700 at 172.17.64.1>;tag=AAA5NwAN2ggCmwxx.
> Contact: <sip:43336999 at 192.168.0.3>.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 102 ACK.
> User-Agent: Asterisk PBX.
> Max-Forwards: 69.
> Content-Length: 0.
> .
>
> #
> U 172.17.64.1:5060 -> 172.17.96.17:5060
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP
> 172.17.96.17:5060;rport=5060;branch=z9hG4bK-3e125d63-77bccb03-1bf1c302.
> Record-Route: <sip:172.17.64.1;lr=on;ftag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63>.
> From: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> To: "43336000"<sip:43336000 at 172.17.64.1:5060>;tag=as119e7abe.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 2 INVITE.
> User-Agent: Asterisk PBX.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
> Max-Forwards: 70.
> Contact: <sip:43336000 at 192.168.0.3:5060>.
> Content-Type: application/sdp.
> Content-Length: 238.
> .
> v=0.
> o=root 21472 21472 IN IP4 192.168.0.3.
> s=session.
> c=IN IP4 172.17.64.1.
> t=0 0.
> m=audio 60022 RTP/AVP 8 0 101.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-16.
> a=silenceSupp:off - - - -.
>
>
> #
> U 172.17.96.17:5060 -> 172.17.64.1:5060
> ACK sip:43336000 at 192.168.0.3:5060 SIP/2.0.
> From: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> To: "43336000"<sip:43336000 at 172.17.64.1:5060>;tag=as119e7abe.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 2 ACK.
> Via: SIP/2.0/UDP
> 172.17.96.17:5060;rport;branch=z9hG4bK-3e125d66-77bcd96f-26ad0a63.
> Max-Forwards: 70.
> Contact: <sip:081701 at 172.17.96.17:5060;transport=UDP>.
> Route: <sip:172.17.64.1;lr;ftag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63>.
> Proxy-Authorization: Digest
> username="081701",realm="172.17.96.17",nonce="46f2861ed3a501550cd33c28b12936d24c42199c",uri="sip:43336000 at 172.17.64.1:5060;transport=UDP",response="4bf0194044fb4a759ec6134d68bef752",algorithm=MD5.
> Content-Length: 0.
> .
>
> #
> U 172.17.96.10:5060 -> 172.17.64.1:5060
> BYE sip:43336999 at 192.168.0.3:1265 SIP/2.0.
> User-Agent: ATI-iMG616RF+/3-5_78.
> Via: SIP/2.0/UDP 172.17.96.10:5060;branch=z9hG4bKAABFNwxx.
> From: 081700 <sip:081700 at 172.17.64.1>;tag=AAA5NwAN2ggCmwxx.
> To: <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 1 BYE.
> Max-Forwards: 70.
> Supported: 100rel,replaces,timer.
> Route: <sip:172.17.64.1;lr;ftag=as28ccd5e9>.
> Content-Length: 0.
> .
>
> #
> U 172.17.64.1:5060 -> 172.17.96.10:5060
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 172.17.96.10:5060;branch=z9hG4bKAABFNwxx.
> Record-Route: <sip:172.17.64.1;lr=on;ftag=AAA5NwAN2ggCmwxx>.
> From: 081700 <sip:081700 at 172.17.64.1>;tag=AAA5NwAN2ggCmwxx.
> To: <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 1 BYE.
> User-Agent: Asterisk PBX.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
> Max-Forwards: 70.
> Contact: <sip:43336999 at 192.168.0.3:5060>.
> Content-Length: 0.
> X-Asterisk-HangupCause: Normal Clearing.
> .
>
> #
> U 172.17.64.1:5060 -> 172.17.96.10:5060
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 172.17.96.10:5060;branch=z9hG4bKAABFNwxx.
> Record-Route: <sip:172.17.64.1;lr=on;ftag=AAA5NwAN2ggCmwxx>.
> From: 081700 <sip:081700 at 172.17.64.1>;tag=AAA5NwAN2ggCmwxx.
> To: <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 1 BYE.
> User-Agent: Asterisk PBX.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
> Max-Forwards: 70.
> Contact: <sip:43336999 at 192.168.0.3:1265>.
> Content-Length: 0.
> X-Asterisk-HangupCause: Normal Clearing.
> .
>
> #
> U 172.17.64.1:5060 -> 172.17.96.17:5060
> BYE sip:081701 at 172.17.96.17:5060 SIP/2.0.
> Record-Route: <sip:172.17.64.1;lr=on;ftag=as119e7abe>.
> Via: SIP/2.0/UDP 172.17.64.1;branch=z9hG4bK4aff.f48c6cd7.0.
> Via: SIP/2.0/UDP 192.168.0.3:5060;branch=z9hG4bK0716a581;rport=5060.
> Route: <sip:172.17.64.1;lr=on;ftag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63>.
> From: "43336000"<sip:43336000 at 172.17.64.1:5060>;tag=as119e7abe.
> To: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> Contact: <sip:43336000 at 192.168.0.3>.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 102 BYE.
> User-Agent: Asterisk PBX.
> Max-Forwards: 69.
> Content-Length: 0.
> .
>
> #
> U 172.17.96.17:5060 -> 172.17.64.1:5060
> SIP/2.0 200 OK.
> From: "43336000"<sip:43336000 at 172.17.64.1:5060>;tag=as119e7abe.
> To: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 102 BYE.
> Via: SIP/2.0/UDP 172.17.64.1;branch=z9hG4bK4aff.f48c6cd7.0.
> Via: SIP/2.0/UDP 192.168.0.3:5060;rport=5060;branch=z9hG4bK0716a581.
> Supported: replaces,100rel.
> Content-Length: 0.
> .
>
>
> And the SIP trace between OpenSER and Asterisk:
>
>
> #
> U 192.168.0.6:5060 -> 192.168.0.3:5060
> INVITE sip:43336000 at 172.17.64.1:5060;transport=UDP SIP/2.0.
> Record-Route: <sip:172.17.64.1;lr=on;ftag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63>.
> From: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> To: "43336000"<sip:43336000 at 172.17.64.1:5060>.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 2 INVITE.
> Via: SIP/2.0/UDP 172.17.64.1;branch=0.
> Via: SIP/2.0/UDP
> 172.17.96.17:5060;rport=5060;branch=z9hG4bK-3e125d63-77bccb03-1bf1c302.
> Max-Forwards: 69.
> Supported: replaces,100rel.
> Allow: INVITE, ACK, BYE, REFER, NOTIFY, CANCEL.
> Contact: <sip:081701 at 172.17.96.17:5060;transport=UDP>.
> Proxy-Authorization: Digest
> username="081701",realm="172.17.96.17",nonce="46f2861ed3a501550cd33c28b12936d24c42199c",uri="sip:43336000 at 172.17.64.1:5060;transport=UDP",response="4bf0194044fb4a759ec6134d68bef752",algorithm=MD5.
> Content-Type: application/sdp.
> Content-Length: 365.
> .
> v=0.
> o=081701 1041391881 1041391881 IN IP4 172.17.96.17.
> s=-.
> c=IN IP4 172.17.64.1.
> t=0 0.
> m=audio 60022 RTP/AVP 8 8 18 4 98 2 101.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:18 G729/8000.
> a=rtpmap:4 g723/8000.
> a=rtpmap:98 g726-16/8000.
> a=rtpmap:2 g726-32/8000.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:18 annexb=no.
> a=fmtp:4 annexa=no.
> a=fmtp:101 0-15.
>
> #
> U 192.168.0.3:5060 -> 192.168.0.6:5060
> SIP/2.0 100 Trying.
> Via: SIP/2.0/UDP 172.17.64.1;branch=0;received=192.168.0.6.
> Via: SIP/2.0/UDP
> 172.17.96.17:5060;rport=5060;branch=z9hG4bK-3e125d63-77bccb03-1bf1c302.
> From: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> To: "43336000"<sip:43336000 at 172.17.64.1:5060>.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 2 INVITE.
> User-Agent: Asterisk PBX.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
> Max-Forwards: 70.
> Contact: <sip:43336000 at 192.168.0.3>.
> Content-Length: 0.
> .
>
> #
> U 192.168.0.3:5060 -> 172.17.64.1:5060
> INVITE sip:081700 at 172.17.64.1 SIP/2.0.
> Via: SIP/2.0/UDP 192.168.0.3:5060;branch=z9hG4bK6ab42128;rport.
> From: "081701" <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> To: <sip:081700 at 172.17.64.1>.
> Contact: <sip:43336999 at 192.168.0.3>.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 102 INVITE.
> User-Agent: Asterisk PBX.
> Max-Forwards: 70.
> Date: Thu, 20 Sep 2007 14:34:26 GMT.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
> Content-Type: application/sdp.
> Content-Length: 182.
> .
> v=0.
> o=root 21472 21472 IN IP4 192.168.0.3.
> s=session.
> c=IN IP4 192.168.0.3.
> t=0 0.
> m=audio 10810 RTP/AVP 8 0.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:0 PCMU/8000.
> a=silenceSupp:off - - - -.
>
> #
> U 172.17.64.1:5060 -> 192.168.0.3:5060
> SIP/2.0 100 trying -- your call is important to us.
> Via: SIP/2.0/UDP 192.168.0.3:5060;branch=z9hG4bK6ab42128;rport=1265.
> From: "081701" <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> To: <sip:081700 at 172.17.64.1>.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 102 INVITE.
> Server: OpenSer (1.1.0-notls (i386/linux)).
> Content-Length: 0.
> Warning: 392 172.17.64.1:5060 "Noisy feedback tells:  pid=15647
> req_src_ip=192.168.0.3 req_src_port=1265 in_uri=sip:081700 at 172.17.64.1
> out_uri=sip:081700 at 172.17.96.12:5060;transport=UDP via_cnt==1".
> .
>
> #
> U 192.168.0.3:5060 -> 192.168.0.6:5060
> SIP/2.0 180 Ringing.
> Via: SIP/2.0/UDP 172.17.64.1;branch=0;received=192.168.0.6.
> Via: SIP/2.0/UDP
> 172.17.96.17:5060;rport=5060;branch=z9hG4bK-3e125d63-77bccb03-1bf1c302.
> From: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> To: "43336000"<sip:43336000 at 172.17.64.1:5060>;tag=as119e7abe.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 2 INVITE.
> User-Agent: Asterisk PBX.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
> Max-Forwards: 70.
> Contact: <sip:43336000 at 192.168.0.3>.
> Content-Length: 0.
> .
>
> #
> U 172.17.64.1:5060 -> 192.168.0.3:5060
> SIP/2.0 180 Ringing.
> User-Agent: ATI-RG613TX/2-3_59.
> Via: SIP/2.0/UDP 192.168.0.3:5060;branch=z9hG4bK6ab42128;rport=1265.
> From: 081701 <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> To: <sip:081700 at 172.17.64.1>;tag=AAAGNwAN2gAZewxx.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 102 INVITE.
> Supported: 100rel,replaces,timer.
> Content-Length: 0.
> .
>
> #
> U 172.17.64.1:5060 -> 192.168.0.3:5060
> SIP/2.0 180 Ringing.
> User-Agent: ATI-iMG616RF+/3-5_78.
> Via: SIP/2.0/UDP 192.168.0.3:5060;branch=z9hG4bK6ab42128;rport=1265.
> From: 081701 <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> To: <sip:081700 at 172.17.64.1>;tag=AAA5NwAN2ggCmwxx.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 102 INVITE.
> Supported: 100rel,replaces,timer.
> Content-Length: 0.
> .
>
> #
> U 172.17.64.1:5060 -> 192.168.0.3:5060
> SIP/2.0 200 OK.
> User-Agent: ATI-iMG616RF+/3-5_78.
> Via: SIP/2.0/UDP 192.168.0.3:5060;branch=z9hG4bK6ab42128;rport=1265.
> From: 081701 <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> To: <sip:081700 at 172.17.64.1>;tag=AAA5NwAN2ggCmwxx.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 102 INVITE.
> Supported: 100rel,replaces,timer.
> Record-Route: <sip:172.17.64.1;lr;ftag=as28ccd5e9>.
> Contact: <sip:081700 at 172.17.96.10:5060;transport=UDP>.
> Content-Length: 170.
> Content-Type: application/sdp.
> .
> v=0.
> o=- 926679040 1 IN IP4 172.17.96.10.
> s=ATI-SIP Call.
> c=IN IP4 172.17.64.1.
> t=0 0.
> m=audio 60024 RTP/AVP 8 13.
> a=rtpmap:8 PCMA/8000.
> a=ptime:10.
> a=rtpmap:13 CN/8000.
>
> #
> U 192.168.0.3:5060 -> 172.17.64.1:5060
> ACK sip:081700 at 172.17.96.10:5060;transport=UDP SIP/2.0.
> Via: SIP/2.0/UDP 192.168.0.3:5060;branch=z9hG4bK78618ac6;rport.
> Route: <sip:172.17.64.1;lr;ftag=as28ccd5e9>.
> From: "081701" <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> To: <sip:081700 at 172.17.64.1>;tag=AAA5NwAN2ggCmwxx.
> Contact: <sip:43336999 at 192.168.0.3>.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 102 ACK.
> User-Agent: Asterisk PBX.
> Max-Forwards: 70.
> Content-Length: 0.
> .
>
> #
> U 192.168.0.3:5060 -> 192.168.0.6:5060
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 172.17.64.1;branch=0;received=192.168.0.6.
> Via: SIP/2.0/UDP
> 172.17.96.17:5060;rport=5060;branch=z9hG4bK-3e125d63-77bccb03-1bf1c302.
> Record-Route: <sip:172.17.64.1;lr=on;ftag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63>.
> From: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> To: "43336000"<sip:43336000 at 172.17.64.1:5060>;tag=as119e7abe.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 2 INVITE.
> User-Agent: Asterisk PBX.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
> Max-Forwards: 70.
> Contact: <sip:43336000 at 192.168.0.3>.
> Content-Type: application/sdp.
> Content-Length: 238.
> .
> v=0.
> o=root 21472 21472 IN IP4 192.168.0.3.
> s=session.
> c=IN IP4 192.168.0.3.
> t=0 0.
> m=audio 12684 RTP/AVP 8 0 101.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-16.
> a=silenceSupp:off - - - -.
>
> #
> U 192.168.0.6:5060 -> 192.168.0.3:5060
> ACK sip:43336000 at 192.168.0.3:5060 SIP/2.0.
> Record-Route: <sip:172.17.64.1;lr=on;ftag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63>.
> From: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> To: "43336000"<sip:43336000 at 172.17.64.1:5060>;tag=as119e7abe.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 2 ACK.
> Via: SIP/2.0/UDP 172.17.64.1;branch=0.
> Via: SIP/2.0/UDP
> 172.17.96.17:5060;rport=5060;branch=z9hG4bK-3e125d66-77bcd96f-26ad0a63.
> Max-Forwards: 69.
> Contact: <sip:081701 at 172.17.96.17:5060;transport=UDP>.
> Route: <sip:172.17.64.1;lr;ftag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63>.
> Proxy-Authorization: Digest
> username="081701",realm="172.17.96.17",nonce="46f2861ed3a501550cd33c28b12936d24c42199c",uri="sip:43336000 at 172.17.64.1:5060;transport=UDP",response="4bf0194044fb4a759ec6134d68bef752",algorithm=MD5.
> Content-Length: 0.
> .
>
> #
> U 192.168.0.6:5060 -> 192.168.0.3:5060
> BYE sip:43336999 at 192.168.0.3:1265 SIP/2.0.
> Record-Route: <sip:172.17.64.1;lr=on;ftag=AAA5NwAN2ggCmwxx>.
> User-Agent: ATI-iMG616RF+/3-5_78.
> Via: SIP/2.0/UDP 172.17.64.1;branch=0.
> Via: SIP/2.0/UDP 172.17.96.10:5060;branch=z9hG4bKAABFNwxx.
> From: 081700 <sip:081700 at 172.17.64.1>;tag=AAA5NwAN2ggCmwxx.
> To: <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 1 BYE.
> Max-Forwards: 69.
> Supported: 100rel,replaces,timer.
> Route: <sip:172.17.64.1;lr;ftag=as28ccd5e9>.
> Content-Length: 0.
> .
>
> #
> U 172.17.64.1:5060 -> 192.168.0.3:5060
> BYE sip:43336999 at 192.168.0.3:1265 SIP/2.0.
> Record-Route: <sip:172.17.64.1;lr=on;ftag=AAA5NwAN2ggCmwxx>.
> User-Agent: ATI-iMG616RF+/3-5_78.
> Via: SIP/2.0/UDP 172.17.64.1;branch=z9hG4bK26ae.adc1e03.0.
> Via: SIP/2.0/UDP 172.17.96.10:5060;branch=z9hG4bKAABFNwxx.
> From: 081700 <sip:081700 at 172.17.64.1>;tag=AAA5NwAN2ggCmwxx.
> To: <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 1 BYE.
> Max-Forwards: 69.
> Supported: 100rel,replaces,timer.
> Content-Length: 0.
> P-hint: rr-enforced.
> .
>
> #
> U 192.168.0.3:5060 -> 192.168.0.6:5060
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 172.17.64.1;branch=0;received=192.168.0.6.
> Via: SIP/2.0/UDP 172.17.96.10:5060;branch=z9hG4bKAABFNwxx.
> Record-Route: <sip:172.17.64.1;lr=on;ftag=AAA5NwAN2ggCmwxx>.
> From: 081700 <sip:081700 at 172.17.64.1>;tag=AAA5NwAN2ggCmwxx.
> To: <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 1 BYE.
> User-Agent: Asterisk PBX.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
> Max-Forwards: 70.
> Contact: <sip:43336999 at 192.168.0.3>.
> Content-Length: 0.
> X-Asterisk-HangupCause: Normal Clearing.
> .
>
> #
> U 192.168.0.3:5060 -> 172.17.64.1:5060
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 172.17.64.1;branch=z9hG4bK26ae.adc1e03.0;received=172.17.64.1.
> Via: SIP/2.0/UDP 172.17.96.10:5060;branch=z9hG4bKAABFNwxx.
> Record-Route: <sip:172.17.64.1;lr=on;ftag=AAA5NwAN2ggCmwxx>.
> From: 081700 <sip:081700 at 172.17.64.1>;tag=AAA5NwAN2ggCmwxx.
> To: <sip:43336999 at 192.168.0.3>;tag=as28ccd5e9.
> Call-ID: 473e63475049c3e6481c39555040cf75 at 192.168.0.3.
> CSeq: 1 BYE.
> User-Agent: Asterisk PBX.
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY.
> Max-Forwards: 70.
> Contact: <sip:43336999 at 192.168.0.3>.
> Content-Length: 0.
> X-Asterisk-HangupCause: Normal Clearing.
> .
>
> #
> U 192.168.0.3:5060 -> 192.168.0.6:5060
> BYE sip:081701 at 172.17.96.17:5060 SIP/2.0.
> Via: SIP/2.0/UDP 192.168.0.3:5060;branch=z9hG4bK0716a581;rport.
> Route: <sip:172.17.64.1;lr=on;ftag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63>.
> From: "43336000"<sip:43336000 at 172.17.64.1:5060>;tag=as119e7abe.
> To: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> Contact: <sip:43336000 at 192.168.0.3>.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 102 BYE.
> User-Agent: Asterisk PBX.
> Max-Forwards: 70.
> Content-Length: 0.
> .
>
> #
> U 192.168.0.6:5060 -> 192.168.0.3:5060
> SIP/2.0 200 OK.
> From: "43336000"<sip:43336000 at 172.17.64.1:5060>;tag=as119e7abe.
> To: "081701"<sip:081701 at 172.17.96.17>;tag=100c3d98-116011ac-13c4-3e125d63-6075d01c-3e125d63.
> Call-ID: 100c7470-116011ac-13c4-3e125d63-539dcd67-3e125d63 at 172.17.96.17.
> CSeq: 102 BYE.
> Via: SIP/2.0/UDP 192.168.0.3:5060;rport=5060;branch=z9hG4bK0716a581.
> Supported: replaces,100rel.
> Content-Length: 0.
> .
>
>
>   