Hello Ben, I agree. These are the INVITE and 200 OK. I only could see that to and from tag an Call-ID are the same. I think that in the article there is nothing about modifying ACK headers to make it work.
INVITE sip:5...@sip.pstnhub.microsoft.com SIP/2.0 Record-Route: <sip:sbc.xxxxxxxxxx.com:5067;transport=tls;lr;did=12a.a46808d1;r2=on> Record-Route: <sip:195.xx.xx.xx:5060;lr;did=12a.a46808d1;r2=on> Via: SIP/2.0/TLS 195.xx.xx.xx:5067;branch=z9hG4bK2f83.ee24a46.0 Via: SIP/2.0/UDP 80.xx.xx.xx.xx:5060;received=80.xx.xx.xx.xx;branch=z9hG4bK4df6ca5c;rport=5060 Max-Forwards: 69 From: <sip:935441...@80.xx.xx.xx.xx>;tag=as7659f57d To: <sip:5...@sbc.xxxxxxxxxx.com:5068> Contact: <sip:935441...@80.xx.xx.xx.xx:5060> Call-ID: 433371746cb44b7d76fdc42013bf9...@80.xx.xx.xx.xx:5060 CSeq: 102 INVITE User-Agent: FPBX-12.0.76.6(11.20.0) Date: Mon, 27 Apr 2020 16:25:24 GMT Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE Supported: replaces, timer Content-Type: application/sdp Content-Length: 1470 SIP/2.0 200 OK FROM: <sip:935441...@80.xx.xx.xx.xx>;tag=as7659f57d TO: <sip:5...@sbc.xxxxxxxxxx.com:5068>;tag=50fe42a7fdb64fe583c1089a0b47f44a CSEQ: 102 INVITE CALL-ID: 433371746cb44b7d76fdc42013bf9...@80.xx.xx.xx.xx:5060 VIA: SIP/2.0/TLS 195.xx.xx.xx:5067;branch=z9hG4bK2f83.ee24a46.0,SIP/2.0/UDP 80.xx.xx.xx.xx:5060;received=80.xx.xx.xx.xx;branch=z9hG4bK4df6ca5c;rport=5060 RECORD-ROUTE: <sip:sip-du-a-eu.pstnhub.microsoft.com:5061;transport=tls;lr>,<sip:sbc.xxxxxxxxxx.com:5067;transport=tls;lr;did=12a.a46808d1;r2=on>,<sip:195.xx.xx.xx:5060;lr;did=12a.a46808d1;r2=on> CONTACT: <sip:api-du-b-euwe.pstnhub.microsoft.com:443;x-i=0c135a71-ddec-454c-a506-91079cb038d7;x-c=385a4453fc885c0bb6276a40d7796d3a/s/1/e1c45d052842415e9c0b3b0b04e32791> CONTENT-LENGTH: 827 SUPPORTED: timer CONTENT-TYPE: application/sdp ALLOW: INVITE,ACK,OPTIONS,CANCEL,BYE,NOTIFY SESSION-EXPIRES: 3600;refresher=uas SERVER: Microsoft.PSTNHub.SIPProxy v.2020.4.20.2 i.EUWE.6 Best Regards, -- Sent from: http://opensips-open-sip-server.1449251.n2.nabble.com/OpenSIPS-Users-f1449235.html _______________________________________________ Users mailing list Users@lists.opensips.org http://lists.opensips.org/cgi-bin/mailman/listinfo/users