i have kamailio server with freeswitch  but i face this problem .any help to explain the reason. i have a problem here  that when callee answer caller phone send bye and terminate the call i will attach the track.   freeswitch listen to sip_server:5068 U 2011/06/13 13:23:41.764946 caller_ip_XXXXX:1024 -> sip_server:5060 INVITE sip:callee@sip..XXXX.XXXSIP/2.0. Via: SIP/2.0/UDP 192.168.1.130:5060;branch=z9hG4bK-a9c2d8ca. From: <sip:909999999@sip.XXXX.XXX>;tag=4fde77c876fbda1ao0. To: <sip:callee@sip.XXXX.XXX>. Call-ID: 850573e0-95b74ce2@192.168.1.130. CSeq: 101 INVITE. Max-Forwards: 70. Contact: <sip:909999999@192.168.1.130:5060>. Expires: 240. User-Agent: Linksys/PAP2T-3.1.15(LS). Content-Length: 444. Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER. Supported: x-sipura. Content-Type: application/sdp. . v=0. o=- 785603 785603 IN IP4 192.168.1.130. s=-. c=IN IP4 192.168.1.130. t=0 0. m=audio 16416 RTP/AVP 18 0 2 4 8 96 97 98 100 101. a=rtpmap:18 G729a/8000. a=rtpmap:0 PCMU/8000. a=rtpmap:2 G726-32/8000. a=rtpmap:4 G723/8000. a=rtpmap:8 PCMA/8000. a=rtpmap:96 G726-40/8000. a=rtpmap:97 G726-24/8000. a=rtpmap:98 G726-16/8000. a=rtpmap:100 NSE/8000. a=fmtp:100 192-193. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=ptime:30. a=sendrecv.     U 2011/06/13 13:23:41.765588 sip_server:5060 -> caller_ip_XXXXX:1024 SIP/2.0 407 Proxy Authentication Required. Via: SIP/2.0/UDP 192.168.1.130:5060;branch=z9hG4bK-a9c2d8ca;rport=1024;received=caller_ip_XXXXX. From: <sip:909999999@sip.XXXX.XXX>;tag=4fde77c876fbda1ao0. To: <sip:callee@sip.XXXX.XXX>;tag=4471d251144740103ef2d5e5631bdc66.e595. Call-ID: 850573e0-95b74ce2@192.168.1.130. CSeq: 101 INVITE. Proxy-Authenticate: Digest realm="sip.XXXX.XXX", nonce="4df5f4690000f03a53f01a12380d236e373437474bf441ef". Server: Kamailio (1.4.4-notls (x86_64/linux)). Content-Length: 0. .     U 2011/06/13 13:23:41.822266 caller_ip_XXXXX:1024 -> sip_server:5060 ACK sip:callee@sip..XXXX.XXXSIP/2.0. Via: SIP/2.0/UDP 192.168.1.130:5060;branch=z9hG4bK-a9c2d8ca. From: <sip:909999999@sip.XXXX.XXX>;tag=4fde77c876fbda1ao0. To: <sip:callee@sip.XXXX.XXX>;tag=4471d251144740103ef2d5e5631bdc66.e595. Call-ID: 850573e0-95b74ce2@192.168.1.130. CSeq: 101 ACK. Max-Forwards: 70. Contact: <sip:909999999@192.168.1.130:5060>. User-Agent: Linksys/PAP2T-3.1.15(LS). Content-Length: 0. .     U 2011/06/13 13:23:41.834779 caller_ip_XXXXX:1024 -> sip_server:5060 INVITE sip:callee@sip..XXXX.XXXSIP/2.0. Via: SIP/2.0/UDP 192.168.1.130:5060;branch=z9hG4bK-9f4eddee. From: <sip:909999999@sip.XXXX.XXX>;tag=4fde77c876fbda1ao0. To: <sip:callee@sip.XXXX.XXX>. Call-ID: 850573e0-95b74ce2@192.168.1.130. CSeq: 102 INVITE. Max-Forwards: 70. Proxy-Authorization: Digest username="909999999",realm="sip.XXXX.XXX",nonce="4df5f4690000f03a53f01a12380d236e373437474bf441 ef",uri="sip:callee@sip.XXXX.XXX",algorithm=MD5,response="82a5c2648544cf1abd616f7816a61a5f". Contact: <sip:909999999@192.168.1.130:5060>. Expires: 240. User-Agent: Linksys/PAP2T-3.1.15(LS). Content-Length: 444. Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER. Supported: x-sipura. Content-Type: application/sdp. . v=0. o=- 785603 785603 IN IP4 192.168.1.130. s=-. c=IN IP4 192.168.1.130. t=0 0. m=audio 16416 RTP/AVP 18 0 2 4 8 96 97 98 100 101. a=rtpmap:18 G729a/8000. a=rtpmap:0 PCMU/8000. a=rtpmap:2 G726-32/8000. a=rtpmap:4 G723/8000. a=rtpmap:8 PCMA/8000. a=rtpmap:96 G726-40/8000. a=rtpmap:97 G726-24/8000. a=rtpmap:98 G726-16/8000. a=rtpmap:100 NSE/8000. a=fmtp:100 192-193. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=ptime:30. a=sendrecv.     U 2011/06/13 13:23:41.838496 sip_server:5060 -> caller_ip_XXXXX:1024 SIP/2.0 100 Giving a try. Via: SIP/2.0/UDP 192.168.1.130:5060;branch=z9hG4bK-9f4eddee;rport=1024;received=caller_ip_XXXXX. From: <sip:909999999@sip.XXXX.XXX>;tag=4fde77c876fbda1ao0. To: <sip:callee@sip.XXXX.XXX>. Call-ID: 850573e0-95b74ce2@192.168.1.130. CSeq: 102 INVITE. Server: Kamailio (1.4.4-notls (x86_64/linux)). Content-Length: 0. .     U 2011/06/13 13:23:41.843647 sip_server:5068 -> gateway_XXXX:5060 INVITE sip:122callee@gateway_XXXX SIP/2.0. Via: SIP/2.0/UDP sip_server:5068;rport;branch=z9hG4bKcZmy3ypB0jm1B. Max-Forwards: 14. From: "909999999" <sip:909999999@sip.XXXX.XXX>;tag=5SNSNaj6XQ8Kr. To: <sip:122callee@gateway_XXXX>. Call-ID: 6f179185-1052-122f-49bf-00221988c79d. CSeq: 13646046 INVITE. Contact: <sip:ufs@sip_server:5068>. User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-11078. Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE, REGISTER, INFO, PUBLISH. Supported: timer, precondition, path, replaces. Allow-Events: talk, presence, dialog, call-info, sla, include-session-description, presence.winfo, message-summary, refer. Min-SE: 120. Content-Type: application/sdp. Content-Disposition: session. Content-Length: 478. P-PInfo: 0. Remote-Party-ID: "909999999" <sip:909999999@sip.XXXX.XXX>;screen=yes;privacy=off. . v=0. o=- 4131904911551689921 6268338771912655224 IN IP4 sip_server. s=-. c=IN IP4 sip_server. t=0 0. m=audio 19594 RTP/AVP 18 0 2 4 8 96 97 98 100 101. a=rtpmap:18 G729a/8000. a=rtpmap:0 PCMU/8000. a=rtpmap:2 G726-32/8000. a=rtpmap:4 G723/8000. a=rtpmap:8 PCMA/8000. a=rtpmap:96 G726-40/8000. a=rtpmap:97 G726-24/8000. a=rtpmap:98 G726-16/8000. a=rtpmap:100 NSE/8000. a=fmtp:100 192-193. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=ptime:30. a=direction:active.     U 2011/06/13 13:23:41.847833 gateway_XXXX:5060 -> sip_server:5068 SIP/2.0 100 Trying. Via: SIP/2.0/UDP sip_server:5068;received=sip_server;rport=5068;branch=z9hG4bKcZmy3ypB0jm1B. From: "909999999" <sip:909999999@sip.XXXX.XXX>;tag=5SNSNaj6XQ8Kr. To: <sip:122callee@gateway_XXXX>. Call-ID: 6f179185-1052-122f-49bf-00221988c79d. CSeq: 13646046 INVITE. Content-Length: 0. .     U 2011/06/13 13:23:47.038040 gateway_XXXX:5060 -> sip_server:5068 SIP/2.0 183 Session Progress. Via: SIP/2.0/UDP sip_server:5068;received=sip_server;rport=5068;branch=z9hG4bKcZmy3ypB0jm1B. From: "909999999" <sip:909999999@sip.XXXX.XXX>;tag=5SNSNaj6XQ8Kr. To: <sip:122callee@gateway_XXXX>;tag=SDlfkl999-e4e6842982432011613141134. Call-ID: 6f179185-1052-122f-49bf-00221988c79d. CSeq: 13646046 INVITE. Server: CS2000_NGSS/8.0. Supported: 100rel. Allow: ACK,BYE,CANCEL,INVITE,OPTIONS,INFO,SUBSCRIBE,REFER,NOTIFY,PRACK. Contact: <sip:gateway_XXXX:5060;transport=UDP>. Content-Type: application/sdp. Content-Length: 246. . v=0. o=PVG 1307966093710 1307966093710 IN IP4 gateway_XXXX. s=-. p=+1 6135555555. c=IN IP4 gateway_XXXX. t=0 0. m=audio 36568 RTP/AVP 18 101. a=fmtp:18 annexb=no. a=fmtp:101 0-15. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=ptime:30.     U 2011/06/13 13:23:47.049924 sip_server:5060 -> caller_ip_XXXXX:1024 SIP/2.0 183 Session Progress. Via: SIP/2.0/UDP 192.168.1.130:5060;rport=1024;received=caller_ip_XXXXX;branch=z9hG4bK-9f4eddee. Record-Route: <sip:sip_server;lr=on;ftag=4fde77c876fbda1ao0>. From: <sip:909999999@sip.XXXX.XXX>;tag=4fde77c876fbda1ao0. To: <sip:callee@sip.XXXX.XXX>;tag=4gv0KF120ej1c. Call-ID: 850573e0-95b74ce2@192.168.1.130. CSeq: 102 INVITE. Contact: <sip:mod_sofia@sip_server:5068;transport=udp>. User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-11078. Accept: application/sdp. Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE, REGISTER, INFO, PUBLISH. Supported: timer, precondition, path, replaces. Allow-Events: talk, presence, dialog, call-info, sla, include-session-description, presence.winfo, message-summary, refer. Content-Type: application/sdp. Content-Disposition: session. Content-Length: 248. . v=0. o=PVG 2756959439342557186 2159116678429256306 IN IP4 sip_server. s=-. p=+1 6135555555. c=IN IP4 sip_server. t=0 0. m=audio 0 RTP/AVP 99 101. a=rtpmap:99 G729/8000. a=fmtp:99 annexb=no. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15.     U 2011/06/13 13:23:49.770967 gateway_XXXX:5060 -> sip_server:5068 SIP/2.0 200 OK. Via: SIP/2.0/UDP sip_server:5068;received=sip_server;rport=5068;branch=z9hG4bKcZmy3ypB0jm1B. From: "909999999" <sip:909999999@sip.XXXX.XXX>;tag=5SNSNaj6XQ8Kr. To: <sip:122callee@gateway_XXXX>;tag=SDlfkl999-e4e6842982432011613141134. Call-ID: 6f179185-1052-122f-49bf-00221988c79d. CSeq: 13646046 INVITE. Server: CS2000_NGSS/8.0. Supported: 100rel. Allow: ACK,BYE,CANCEL,INVITE,OPTIONS,INFO,SUBSCRIBE,REFER,NOTIFY,PRACK. Contact: <sip:gateway_XXXX:5060;transport=UDP>. Content-Type: application/sdp. Content-Length: 246. . v=0. o=PVG 1307966093710 1307966093710 IN IP4 gateway_XXXX. s=-. p=+1 6135555555. c=IN IP4 gateway_XXXX. t=0 0. m=audio 36568 RTP/AVP 18 101. a=fmtp:18 annexb=no. a=fmtp:101 0-15. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15. a=ptime:30.     U 2011/06/13 13:23:49.771167 sip_server:5068 -> gateway_XXXX:5060 ACK sip:gateway_XXXX:5060;transport=UDP SIP/2.0. Via: SIP/2.0/UDP sip_server:5068;rport;branch=z9hG4bKD8DQ5S7eXUamQ. Max-Forwards: 70. From: "909999999" <sip:909999999@sip.XXXX.XXX>;tag=5SNSNaj6XQ8Kr. To: <sip:122callee@gateway_XXXX>;tag=SDlfkl999-e4e6842982432011613141134. Call-ID: 6f179185-1052-122f-49bf-00221988c79d. CSeq: 13646046 ACK. Contact: <sip:ufs@sip_server:5068>. Content-Length: 0. .     U 2011/06/13 13:23:49.774216 sip_server:5060 -> caller_ip_XXXXX:1024 SIP/2.0 200 OK. Via: SIP/2.0/UDP 192.168.1.130:5060;rport=1024;received=caller_ip_XXXXX;branch=z9hG4bK-9f4eddee. Record-Route: <sip:sip_server;lr=on;ftag=4fde77c876fbda1ao0>. From: <sip:909999999@sip.XXXX.XXX>;tag=4fde77c876fbda1ao0. To: <sip:callee@sip.XXXX.XXX>;tag=4gv0KF120ej1c. Call-ID: 850573e0-95b74ce2@192.168.1.130. CSeq: 102 INVITE. Contact: <sip:mod_sofia@sip_server:5068;transport=udp>. User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-11078. Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE, REGISTER, INFO, PUBLISH. Supported: timer, precondition, path, replaces. Allow-Events: talk, presence, dialog, call-info, sla, include-session-description, presence.winfo, message-summary, refer. Min-SE: 120. Content-Type: application/sdp. Content-Disposition: session. Content-Length: 248. . v=0. o=PVG 2756959439342557186 2159116678429256306 IN IP4 sip_server. s=-. p=+1 6135555555. c=IN IP4 sip_server. t=0 0. m=audio 0 RTP/AVP 99 101. a=rtpmap:99 G729/8000. a=fmtp:99 annexb=no. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-15.     U 2011/06/13 13:23:49.836231 caller_ip_XXXXX:1024 -> sip_server:5060 ACK sip:mod_sofia@sip_server:5068;transport=udp SIP/2.0. Via: SIP/2.0/UDP 192.168.1.130:5060;branch=z9hG4bK-d84f3d54. From: <sip:909999999@sip.XXXX.XXX>;tag=4fde77c876fbda1ao0. To: <sip:callee@sip.XXXX.XXX>;tag=4gv0KF120ej1c. Call-ID: 850573e0-95b74ce2@192.168.1.130. CSeq: 102 ACK. Max-Forwards: 70. Route: <sip:sip_server;lr=on;ftag=4fde77c876fbda1ao0>. Proxy-Authorization: Digest username="909999999",realm="sip.XXXX.XXX",nonce="4df5f4690000f03a53f01a12380d236e373437474bf441 ef",uri="sip:mod_sofia@sip_server:5068",algorithm=MD5,response="1dc1c1666a5d210779ab1daf84b6eb10". Contact: <sip:909999999@192.168.1.130:5060>. User-Agent: Linksys/PAP2T-3.1.15(LS). Content-Length: 0. .     U 2011/06/13 13:23:49.843388 caller_ip_XXXXX:1024 -> sip_server:5060 BYE sip:mod_sofia@sip_server:5068;transport=udp SIP/2.0. Via: SIP/2.0/UDP 192.168.1.130:5060;branch=z9hG4bK-1710f527. From: <sip:909999999@sip.XXXX.XXX>;tag=4fde77c876fbda1ao0. To: <sip:callee@sip.XXXX.XXX>;tag=4gv0KF120ej1c. Call-ID: 850573e0-95b74ce2@192.168.1.130. CSeq: 103 BYE. Max-Forwards: 70. Route: <sip:sip_server;lr=on;ftag=4fde77c876fbda1ao0>. Proxy-Authorization: Digest username="909999999",realm="sip.XXXX.XXX",nonce="4df5f4690000f03a53f01a12380d236e373437474bf441 ef",uri="sip:mod_sofia@sip_server:5068",algorithm=MD5,response="ff113ffd721bbaef656458c39840e450". User-Agent: Linksys/PAP2T-3.1.15(LS). Content-Length: 0. .     U 2011/06/13 13:23:49.845476 sip_server:5060 -> caller_ip_XXXXX:1024 SIP/2.0 200 OK. Via: SIP/2.0/UDP 192.168.1.130:5060;rport=1024;received=caller_ip_XXXXX;branch=z9hG4bK-1710f527. From: <sip:909999999@sip.XXXX.XXX>;tag=4fde77c876fbda1ao0. To: <sip:callee@sip.XXXX.XXX>;tag=4gv0KF120ej1c. Call-ID: 850573e0-95b74ce2@192.168.1.130. CSeq: 103 BYE. User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-11078. Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE, REGISTER, INFO, PUBLISH. Supported: timer, precondition, path, replaces. Content-Length: 0. .     U 2011/06/13 13:23:49.848748 sip_server:5068 -> gateway_XXXX:5060 BYE sip:gateway_XXXX:5060;transport=UDP SIP/2.0. Via: SIP/2.0/UDP sip_server:5068;rport;branch=z9hG4bKeH7F7mrjt406j. Max-Forwards: 70. From: "909999999" <sip:909999999@sip.XXXX.XXX>;tag=5SNSNaj6XQ8Kr. To: <sip:122callee@gateway_XXXX>;tag=SDlfkl999-e4e6842982432011613141134. Call-ID: 6f179185-1052-122f-49bf-00221988c79d. CSeq: 13646047 BYE. Contact: <sip:ufs@sip_server:5068>. User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-11078. Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE, REGISTER, INFO, PUBLISH. Supported: timer, precondition, path, replaces. Reason: Q.850;cause=16;text="NORMAL_CLEARING". Content-Length: 0. .     U 2011/06/13 13:23:49.858691 gateway_XXXX:5060 -> sip_server:5068 SIP/2.0 200 OK. Via: SIP/2.0/UDP sip_server:5068;received=sip_server;rport=5068;branch=z9hG4bKeH7F7mrjt406j. From: "909999999" <sip:909999999@sip.XXXX.XXX>;tag=5SNSNaj6XQ8Kr. To: <sip:122callee@gateway_XXXX>;tag=SDlfkl999-e4e6842982432011613141134. Call-ID: 6f179185-1052-122f-49bf-00221988c79d. CSeq: 13646047 BYE. Server: CS2000_NGSS/8.0. Supported: 100rel. Allow: ACK,BYE,CANCEL,INVITE,OPTIONS,INFO,SUBSCRIBE,REFER,NOTIFY,PRACK. Content-Length: 0. .