Hi, I'm using SER with Sipura and VoIP GW. When there is no line available from the VoIP GW, the VoIP GW replies with 486 Busy Here. The Sipura receives this message and sends an ACK. The ACK has the IP addr. Of the SER. Is it ok, or it should be the IP address of the VoIP GW. When SER receives the ACK with its IP address 192.168.20.155 <http://192.168.20.155>, there is a loop of ACK in SER......... I attached a trace and this is my configuration. 192.168.20.155 <http://192.168.20.155> is the SIP Proxy 192.168.20.105 <http://192.168.20.105> is the VoIP GW 192.168.20.90 <http://192.168.20.90> is the Sipura 312 54.858597 192.168.20.90 <http://192.168.20.90> 192.168.20.155<http://192.168.20.155>SIP/SDP Request: INVITE sip:3353@192.168.20.155, with session description 313 54.860243 192.168.20.155 <http://192.168.20.155> 192.168.20.90<http://192.168.20.90>SIP Status: 407 Proxy Authentication Required 314 54.877006 192.168.20.90 <http://192.168.20.90> 192.168.20.155<http://192.168.20.155>SIP Request: ACK sip:3353@192.168.20.155 315 54.886801 192.168.20.90 <http://192.168.20.90> 192.168.20.155<http://192.168.20.155>SIP/SDP Request: INVITE sip:3353@192.168.20.155, with session description 316 54.889720 192.168.20.155 <http://192.168.20.155> 192.168.20.105<http://192.168.20.105>SIP/SDP Request: INVITE sip:3353@192.168.20.105:5060, with session description 318 54.924666 192.168.20.105 <http://192.168.20.105> 192.168.20.155<http://192.168.20.155>SIP Status: 100 Trying 319 54.925866 192.168.20.155 <http://192.168.20.155> 192.168.20.90<http://192.168.20.90>SIP Status: 100 Trying 320 54.950257 192.168.20.105 <http://192.168.20.105> 192.168.20.155<http://192.168.20.155>SIP Status: 486 Busy Here 321 54.951442 192.168.20.155 <http://192.168.20.155> 192.168.20.90<http://192.168.20.90>SIP Status: 486 Busy Here 323 54.968942 192.168.20.90 <http://192.168.20.90> 192.168.20.155<http://192.168.20.155>SIP Request: ACK sip:3353@192.168.20.155 440 55.527290 192.168.20.105 <http://192.168.20.105> 192.168.20.155<http://192.168.20.155>SIP Status: 486 Busy Here 441 55.528528 192.168.20.155 <http://192.168.20.155> 192.168.20.90<http://192.168.20.90>SIP Status: 486 Busy Here 442 55.547237 192.168.20.90 <http://192.168.20.90> 192.168.20.155<http://192.168.20.155>SIP Request: ACK sip:3353@192.168.20.155 627 56.624649 192.168.20.105 <http://192.168.20.105> 192.168.20.155<http://192.168.20.155>SIP Status: 486 Busy Here 639 56.626924 192.168.20.155 <http://192.168.20.155> 192.168.20.90<http://192.168.20.90>SIP Status: 486 Busy Here 649 56.647321 192.168.20.90 <http://192.168.20.90> 192.168.20.155<http://192.168.20.155>SIP Request: ACK sip:3353@192.168.20.155 912 58.719683 192.168.20.105 <http://192.168.20.105> 192.168.20.155<http://192.168.20.155>SIP Status: 486 Busy Here 913 58.720967 192.168.20.155 <http://192.168.20.155> 192.168.20.90<http://192.168.20.90>SIP Status: 486 Busy Here 916 58.746851 192.168.20.90 <http://192.168.20.90> 192.168.20.155<http://192.168.20.155>SIP Request: ACK sip:3353@192.168.20.155 1192 62.806510 192.168.20.105 <http://192.168.20.105> 192.168.20.155<http://192.168.20.155>SIP Status: 486 Busy Here 1193 62.807741 192.168.20.155 <http://192.168.20.155> 192.168.20.90<http://192.168.20.90>SIP Status: 486 Busy Here 1194 62.827148 192.168.20.90 <http://192.168.20.90> 192.168.20.155<http://192.168.20.155>SIP Request: ACK sip:3353@192.168.20.155 1417 66.892115 192.168.20.105 <http://192.168.20.105> 192.168.20.155<http://192.168.20.155>SIP Status: 486 Busy Here 1418 66.893350 192.168.20.155 <http://192.168.20.155> 192.168.20.90<http://192.168.20.90>SIP Status: 486 Busy Here 1419 66.907704 192.168.20.90 <http://192.168.20.90> 192.168.20.155<http://192.168.20.155>SIP Request: ACK sip:3353@192.168.20.155 1628 68.143481 192.168.20.101 <http://192.168.20.101> 192.168.20.55<http://192.168.20.55>SIP Request: BYE sip:06@192.168.20.105:5060;maddr=192.168.20.105<http://192.168.20.105> 1630 68.147489 192.168.20.55 <http://192.168.20.55> 192.168.20.105<http://192.168.20.105>SIP Request: BYE sip:06@192.168.20.105:5060;maddr=192.168.20.105<http://192.168.20.105> 1631 68.174246 192.168.20.105 <http://192.168.20.105> 192.168.20.55<http://192.168.20.55>SIP Status: 200 OK 1632 68.176946 192.168.20.55 <http://192.168.20.55> 192.168.20.101<http://192.168.20.101>SIP Status: 200 OK Micheline _______________________________________________ Serusers mailing list serusers(a)lists.iptel.org http://lists.iptel.org/mailman/listinfo/serusers