|Time | 9.9.9.9 (SIP provider) | 7.7.7.7(IP2 proxy)| | | | | 8.8.8.8(IP1 proxy)| | 6.6.6.6(Customer IPBX)| |0,000 | INVITE SDP ype-101 ) | | | | |(5060) ------------------> (5060) | | | |0,000 | 100 Trying| | | |SIP Status | |(5060) <------------------ (5060) | | | |0,000 | 100 Giving a try | | |SIP Status | |(5060) <------------------ (5060) | | | |0,000 | 180 Ringing | | |SIP Status | |(5060) <------------------ (5060) | | | |0,000 | | | INVITE SDP |SIP Request | | | |(5060) ------------------> (5060) | |0,190 | | | 100 Trying| |SIP Status | | | |(5060) <------------------ (5060) | |0,285 | | | 183 Session Progress |SIP Status | | | |(5060) <------------------ (5060) | |0,285 | | | 180 Ringing |SIP Status | | | |(5060) <------------------ (5060) | |0,285 | 180 Ringing | | |SIP Status | |(5060) <------------------ (5060) | | | |1,818 | | | !200 OK SDP (g711A)! |SIP Status | | | |(5060) <------------------ (5060) | |1,818 | 200 OK SDP (g711A) | | |SIP Status | |(5060) <------------------ (5060) | | | |1,818 | !ACK! | | | |SIP Request | |(5060) ------------------> (5060) | | | |2,289 | 200 OK SDP (g711A) | | |SIP Status | |(5060) <------------------ (5060) | | | |2,289 | | | 200 OK SDP (g711A) |SIP Status | | | |(5060) <------------------ (5060) | |2,289 | ACK | | | |SIP Request | |(5060) ------------------> (5060) | | | |3,242 | | | 200 OK SDP (g711A) |SIP Status | | | |(5060) <------------------ (5060) | |3,338 | ACK | | | |SIP Request | |(5060) ------------------> (5060) | | | |3,338 | 200 OK SDP (g711A) | | |SIP Status | |(5060) <------------------ (5060) | | | |5,277 | 200 OK SDP (g711A) | | |SIP Status | |(5060) <------------------ (5060) | | | |5,277 | | | 200 OK SDP (g711A) |SIP Status | | | |(5060) <------------------ (5060) | |5,278 | ACK | | | |SIP Request | |(5060) ------------------> (5060) | | | |9,245 | | | 200 OK SDP (g711A) |SIP Status | | | |(5060) <------------------ (5060) | |13,259 | | | 200 OK SDP (g711A) |SIP Status | | | |(5060) <------------------ (5060) | |17,336 | | | 200 OK SDP (g711A) |SIP Status | | | |(5060) <------------------ (5060) | |21,304 | | | 200 OK SDP (g711A) |SIP Status | | | |(5060) <------------------ (5060) | |25,243 | | | 200 OK SDP (g711A) |SIP Status | | | |(5060) <------------------ (5060) | |29,291 | | | 200 OK SDP (g711A) |SIP Status | | | |(5060) <------------------ (5060) | |33,328 | | | 200 OK SDP (g711A) |SIP Status | | | |(5060) <------------------ (5060) | |60,716 | BYE | | | |SIP Request | |(5060) ------------------> (5060) | | | |60,716 | 404 Not here | | |SIP Status | |(5060) <------------------ (5060) | | | |239,836 | BYE | | | |SIP Request | |(5060) <------------------ (5060) | | | |239,836 | | | BYE | |SIP Request | | | |(5060) ------------------> (5060) | |239,837 | 481 Call Leg/Transaction Does Not Exist | | |SIP Status | |(5060) ------------------> (5060) | | | |239,931 | | | 481 Call/Transaction Does Not Exist |SIP Status | | | |(5060) <------------------ (5060) | ACK from provider, but Opensips no resend ACK to Cutomer IPBX ACK sip:+333XXXXXXX@6.6.6.6:5060 SIP/2.0 From: ;tag=c97942d9-13c4-50237efd-8d49d7d0-5fb68102 To: ;tag=407A Call-ID: CXC-224-6a226890-c97942d9-13c4-50237efd-8d49d7d0-bd31de4@9.9.9.9 CSeq: 1 ACK Via: SIP/2.0/UDP 9.9.9.9:5060;branch=z9hG4bK-16323bb-50237eff-8d49ded9-37571fbc Max-Forwards: 69 Contact: Route: Route: Content-Length: 0 200 ok From customer IPBX SIP/2.0 200 OK Accept: application/sdp,application/dtmf-relay Allow: PRACK,ACK,CANCEL,BYE,SUBSCRIBE,NOTIFY,INVITE,REFER,OPTIONS,INFO,UPDATE,REGISTER Call-ID: CXC-224-6a226890-c97942d9-13c4-50237efd-8d49d7d0-bd31de4@9.9.9.9 Contact: Content-Type: application/sdp CSeq: 1 INVITE From: ;tag=c97942d9-13c4-50237efd-8d49d7d0-5fb68102 Privacy: none Record-Route: , To: ;tag=407A Via: SIP/2.0/UDP 7.7.7.7;received=7.7.7.7;branch=z9hG4bKad65.c86bae22.0,SIP/2.0/UDP 9.9.9.9:5060;branch=z9hG4bK-1632372-50237efd-8d49d7d0-258fba13 Content-Length: 178 v=0 o=6.6.6.6 3160829095 3160829096 IN IP4 6.6.6.6 s=Session SDP c=IN IP4 6.6.6.6 t=0 0 m=audio 16390 RTP/AVP 8 a=rtpmap:8 PCMA/8000 a=ptime:20