Hi I am using Openser as the sip proxy in front of freeswitch. When using Record-Route, Freeswitch hangs of every call after 30 s. 277.32.22.33:5060 is the public ip of openser and 192.168.1.101:5800 is freeswitch's external profile port. Both openser and freeswitch are within the same box. In the console, I am getting: 2008-11-25 01:31:24 [DEBUG] sofia.c:2318 sofia_handle_sip_i_state() Channel sofia/external/1000@61.141.158.178 entering state [terminating] freeswitch@localhost.localdomain> freeswitch@localhost.localdomain> 2008-11-25 01:31:24 [DEBUG] sofia.c:2318 sofia_handle_sip_i_state() Channel sofia/external/1000@61.141.158.178entering state [terminated] Here is the sip trace: U 192.168.1.101:5800 -> 277.32.22.33:5060 SIP/2.0 200 OK. Via: SIP/2.0/UDP 192.168.1.101 ;branch=z9hG4bK022f.a4e32a57.0;received=277.32.22.33. Via: SIP/2.0/UDP 192.168.1.102:12334;received=121.15.98.134 ;branch=z9hG4bK-d87543-a5439229f1204a4e-1--d87543-;rport=14392. Record-Route: <sip:192.168.1.101;lr=on;ftag=c947d86b>. From: "1000" <sip:1000@277.32.22.33>;tag=c947d86b. To: "0" <sip:0@277.32.22.33>;tag=4Uve20t8p31Ba. Call-ID: NmZkYzU5MGYzZjBhZGM5YjQ0MjhiNzlmMDc5NzNjNjI.. CSeq: 2 INVITE. Contact: <sip:mod_sofia@277.32.22.33:5800;transport=udp>. User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-10454M. Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE, REGISTER, INFO. Supported: timer, precondition, path, replaces. Allow-Events: talk. Session-Expires: 120;refresher=uas. Min-SE: 120. Content-Type: application/sdp. Content-Disposition: session. Content-Length: 268. . v=0. o=FreeSWITCH 6527595211019529703 806853432324137362 IN IP4 277.32.22.33. s=FreeSWITCH. c=IN IP4 277.32.22.33. t=0 0. m=audio 11046 RTP/AVP 0 101. a=rtpmap:0 PCMU/8000. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-16. a=silenceSupp:off - - - -. a=ptime:20. U 277.32.22.33:5800 -> 192.168.1.101:5060 SIP/2.0 200 OK. Via: SIP/2.0/UDP 192.168.1.101 ;branch=z9hG4bK022f.a4e32a57.0;received=277.32.22.33. Via: SIP/2.0/UDP 192.168.1.102:12334;received=121.15.98.134 ;branch=z9hG4bK-d87543-a5439229f1204a4e-1--d87543-;rport=14392. Record-Route: <sip:192.168.1.101;lr=on;ftag=c947d86b>. From: "1000" <sip:1000@277.32.22.33>;tag=c947d86b. To: "0" <sip:0@277.32.22.33>;tag=4Uve20t8p31Ba. Call-ID: NmZkYzU5MGYzZjBhZGM5YjQ0MjhiNzlmMDc5NzNjNjI.. CSeq: 2 INVITE. Contact: <sip:mod_sofia@277.32.22.33:5800;transport=udp>. User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-10454M. Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE, REGISTER, INFO. Supported: timer, precondition, path, replaces. Allow-Events: talk. Session-Expires: 120;refresher=uas. Min-SE: 120. Content-Type: application/sdp. Content-Disposition: session. Content-Length: 268. . v=0. o=FreeSWITCH 6527595211019529703 806853432324137362 IN IP4 277.32.22.33. s=FreeSWITCH. c=IN IP4 277.32.22.33. t=0 0. m=audio 11046 RTP/AVP 0 101. a=rtpmap:0 PCMU/8000. a=rtpmap:101 telephone-event/8000. a=fmtp:101 0-16. a=silenceSupp:off - - - -. a=ptime:20. U 192.168.1.101:5800 -> 277.32.22.33:5060 BYE sip:1000@121.15.98.134:14392 SIP/2.0. Via: SIP/2.0/UDP 277.32.22.33:5800;rport;branch=z9hG4bK10ttgjpr9KeQg. Route: <sip:192.168.1.101;lr=on;ftag=c947d86b>. Max-Forwards: 70. From: "0" <sip:0@277.32.22.33>;tag=4Uve20t8p31Ba. To: "1000" <sip:1000@277.32.22.33>;tag=c947d86b. Call-ID: NmZkYzU5MGYzZjBhZGM5YjQ0MjhiNzlmMDc5NzNjNjI.. CSeq: 107655293 BYE. Contact: <sip:mod_sofia@277.32.22.33:5800;transport=udp>. User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-10454M. Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE, REGISTER, INFO. Supported: timer, precondition, path, replaces. Reason: SIP;cause=408;text="ACK Timeout". Content-Length: 0. . U 277.32.22.33:5800 -> 192.168.1.101:5060 BYE sip:1000@121.15.98.134:14392 SIP/2.0. Via: SIP/2.0/UDP 277.32.22.33:5800;rport;branch=z9hG4bK10ttgjpr9KeQg. Route: <sip:192.168.1.101;lr=on;ftag=c947d86b>. Max-Forwards: 70. From: "0" <sip:0@277.32.22.33>;tag=4Uve20t8p31Ba. To: "1000" <sip:1000@277.32.22.33>;tag=c947d86b. Call-ID: NmZkYzU5MGYzZjBhZGM5YjQ0MjhiNzlmMDc5NzNjNjI.. CSeq: 107655293 BYE. Contact: <sip:mod_sofia@277.32.22.33:5800;transport=udp>. User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-10454M. Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE, REGISTER, INFO. Supported: timer, precondition, path, replaces. Reason: SIP;cause=408;text="ACK Timeout". Content-Length: 0. . U 192.168.1.101:5800 -> 277.32.22.33:5060 BYE sip:1000@121.15.98.134:14392 SIP/2.0. Via: SIP/2.0/UDP 277.32.22.33:5800;rport;branch=z9hG4bK10ttgjpr9KeQg. Route: <sip:192.168.1.101;lr=on;ftag=c947d86b>. Max-Forwards: 70. From: "0" <sip:0@277.32.22.33>;tag=4Uve20t8p31Ba. To: "1000" <sip:1000@277.32.22.33>;tag=c947d86b. Call-ID: NmZkYzU5MGYzZjBhZGM5YjQ0MjhiNzlmMDc5NzNjNjI.. CSeq: 107655293 BYE. Contact: <sip:mod_sofia@277.32.22.33:5800;transport=udp>. User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-10454M. Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE, REGISTER, INFO. Supported: timer, precondition, path, replaces. Reason: SIP;cause=408;text="ACK Timeout". Content-Length: 0. . U 277.32.22.33:5800 -> 192.168.1.101:5060 BYE sip:1000@121.15.98.134:14392 SIP/2.0. Via: SIP/2.0/UDP 277.32.22.33:5800;rport;branch=z9hG4bK10ttgjpr9KeQg. Route: <sip:192.168.1.101;lr=on;ftag=c947d86b>. Max-Forwards: 70. From: "0" <sip:0@277.32.22.33>;tag=4Uve20t8p31Ba. To: "1000" <sip:1000@277.32.22.33>;tag=c947d86b. Call-ID: NmZkYzU5MGYzZjBhZGM5YjQ0MjhiNzlmMDc5NzNjNjI.. CSeq: 107655293 BYE. Contact: <sip:mod_sofia@277.32.22.33:5800;transport=udp>. User-Agent: FreeSWITCH-mod_sofia/1.0.trunk-10454M. Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE, REGISTER, INFO. Supported: timer, precondition, path, replaces. Reason: SIP;cause=408;text="ACK Timeout". Content-Length: 0. . U 192.168.1.101:5060 -> 277.32.22.33:5800 SIP/2.0 200 OK. Via: SIP/2.0/UDP 277.32.22.33:5800;received=277.32.22.33;rport=5800;branch=z9hG4bK10ttgjpr9KeQg. Record-Route: <sip:192.168.1.101;lr;ftag=4Uve20t8p31Ba>. Contact: <sip:1000@121.15.98.134:14392>. To: "1000"<sip:1000@277.32.22.33>;tag=c947d86b. From: "0"<sip:0@277.32.22.33>;tag=4Uve20t8p31Ba. Call-ID: NmZkYzU5MGYzZjBhZGM5YjQ0MjhiNzlmMDc5NzNjNjI.. CSeq: 107655293 BYE. User-Agent: X-Lite release 1011s stamp 41150. Content-Length: 0. P-hint: (3)passed thru onreply_route[1]. . U 277.32.22.33:5060 -> 192.168.1.101:5800 SIP/2.0 200 OK. Via: SIP/2.0/UDP 277.32.22.33:5800;received=277.32.22.33;rport=5800;branch=z9hG4bK10ttgjpr9KeQg. Record-Route: <sip:192.168.1.101;lr;ftag=4Uve20t8p31Ba>. Contact: <sip:1000@121.15.98.134:14392>. To: "1000"<sip:1000@277.32.22.33>;tag=c947d86b. From: "0"<sip:0@277.32.22.33>;tag=4Uve20t8p31Ba. Call-ID: NmZkYzU5MGYzZjBhZGM5YjQ0MjhiNzlmMDc5NzNjNjI.. CSeq: 107655293 BYE. User-Agent: X-Lite release 1011s stamp 41150. Content-Length: 0. P-hint: (3)passed thru onreply_route[1]. . Thanks in advance for any help or suggestion on resolving the problem. Woody