HI, I need a little help figuring out why FS sends 503. I happens when 302 happens and opensips relay another call throught FS. It started to happening why I used in a brdige dns srv domain. All other trasfers and call a lookig good and wokirng. p.s.: 302 is handled by opensips. tnx here is a pastebin: http://pastebin.freeswitch.org/21677 And here is just sip trace: 1028.883730 UAC_PUBLIC_IP -> OPENSIPS_IP SIP/SDP Request: INVITE sip:014310000@dns_srv.domain.com, with session description 1028.888153 OPENSIPS_IP -> UAC_PUBLIC_IP SIP Status: 100 Giving a try 1028.888248 OPENSIPS_IP -> FS_IP SIP/SDP Request: INVITE sip:38614310000@dns_srv.domain.com, with session description 1028.889756 FS_IP -> OPENSIPS_IP SIP Status: 100 Trying 1028.916452 84.41.126.2 -> OPENSIPS_IP SIP Request: NOTIFY sip:dns_srv.domain.com 1028.917245 OPENSIPS_IP -> 84.41.126.2 SIP Status: 407 Proxy Authentication Required 1028.926470 FS_IP -> OPENSIPS_IP SIP/SDP Request: INVITE sip:38614310000@dns_srv.domain.com, with session description 1028.934352 OPENSIPS_IP -> FS_IP SIP Status: 100 Giving a try 1028.934438 OPENSIPS_IP -> UAC_PUBLIC_IP SIP/SDP Request: INVITE sip:38614310000@UAC_PUBLIC_IP:8604, with session description 1028.954083 UAC_PUBLIC_IP -> OPENSIPS_IP SIP Status: 100 Trying 1028.956366 84.41.126.2 -> OPENSIPS_IP SIP Request: NOTIFY sip:dns_srv.domain.com 1028.956998 OPENSIPS_IP -> 84.41.126.2 SIP Status: 484 Address Incomplete 1028.957910 UAC_PUBLIC_IP -> OPENSIPS_IP SIP Status: 302 Moved Temporarily 1028.958296 OPENSIPS_IP -> UAC_PUBLIC_IP SIP Request: ACK sip:38614310000@UAC_PUBLIC_IP:8604 1028.976068 OPENSIPS_IP -> FS_IP SIP/SDP Request: INVITE sip:30238651357952@dns_srv.domain.com, with session description 1028.977116 FS_IP -> OPENSIPS_IP SIP Status: 100 Trying 1029.036370 FS_IP -> OPENSIPS_IP SIP Status: 503 Service Unavailable 1029.036849 OPENSIPS_IP -> FS_IP SIP Request: ACK sip:30238651357952@dns_srv.domain.com 1029.037055 OPENSIPS_IP -> FS_IP SIP Status: 500 Service Unavailable