<div dir="ltr">If it can help you ... this is a working example:<div><br></div><div>tag: snd<br>pid: 19012<br>process: 1<br>time: 1612951019.957348<br>date: Wed Feb 10 10:56:59 2021<br>proto: tls ipv4<br>srcip: SBC-IP-ADDR<br>srcport: 5061 <br>dstip: 52.114.76.76<br>dstport: 5061<br>~~~~~~~~~~~~~~~~~~~~<br>SIP/2.0 200 OK<br>Via: SIP/2.0/TLS 52.114.76.76:5061;branch=z9hG4bK9984dd75<br>Record-Route: <sip:SBC-DNS-DOMAIN:5060;r2=on;lr><br>Record-Route: <sip:SBC-DNS-DOMAIN:5061;transport=tls;r2=on;lr><br>Record-Route: <sip:sip-du-a-eu.pstnhub.microsoft.com:5061;transport=tls;lr><br>From: Pepelux<sip:+YYYYYYYYYYY@sip.pstnhub.microsoft.com:5061;user=phone>;tag=20cc826cdb36430089baeefcaa846f4a<br>To: <sip:+XXXXXXXXXXX@SBC-DNS-DOMAIN:5061;user=phone>;tag=as075f399f<br>Call-ID: b81c3635f25b55a8b6aa2d4943624a16<br>CSeq: 1 INVITE<br>Server: Asterisk PBX<br>Allow:sINVITE, ACK, CANCEL, OPTIONS, BYE, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE<br>Supported: replaces<br>Contact: <sip:+XXXXXXXXXXX@ASTERISK-IP-ADDR:5060><br>Content-Type: application/sdp<br>Content-Length: 614<br><br>v=0<br>o=root 794961255 794961255 IN IP4 SBC-IP-ADDR<br>s=Asterisk PBX<br>c=IN IP4 SBC-IP-ADDR<br>t=0 0<br>m=audio 36834 RTP/SAVP 0 8 101<br>a=maxptime:150<br>a=mid:1<br>a=rtpmap:0 PCMU/8000<br>a=rtpmap:8 PCMA/8000<br>a=rtpmap:101 telephone-event/8000<br>a=fmtp:101 0-16<br>a=sendrecv<br>a=rtcp:36835<br>a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:iPGdIbVhkYq+7b4QU7selA9ymifeEN07VTVSfhmR<br>a=ptime:20<br>a=ice-ufrag:y9FpiQul<br>a=ice-pwd:IBAulXNNVx2fqpFE1K9BzLYbuG<br>a=candidate:MLkUNexgYqowLxtY 1 UDP 2130706431 SBC-IP-ADDR 36834 typ host<br>a=candidate:MLkUNexgYqowLxtY 2 UDP 2130706430 SBC-IP-ADDR 36835 typ host<br></div><div><br></div><div>Cheers</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 11 Feb 2021 at 14:28, Phillman25 Kyriacou <<a href="mailto:phillman25@gmail.com">phillman25@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hi Guys <div><br></div><div>Thanks for all your recommendations.</div><div><br></div><div>I did the change and rr headers only show the fqdn of Kamailio as you can see below in the 200 OK sent back to MS Teams, however still the same issue no ACK.</div><div><br></div><div>||||||||||||||||||||<br>====================<br>tag: snd<br>pid: 31232<br>process: 6<br>time: 1613047849.768857<br>date: Thu Feb 11 14:50:49 2021<br>proto: tls ipv4<br>srcip: 82.102.42.58<br>srcport: 5061<br>dstip: 52.114.132.46<br>dstport: 5061<br>~~~~~~~~~~~~~~~~~~~~<br>SIP/2.0 200 OK<br>Via: SIP/2.0/TLS 52.114.132.46:5061;branch=z9hG4bK4f5c9b66<br>Record-Route: <sip:sbc.intelligentsupport.eu:5060;ftag=dcea3c9546914ff8826afca13260da1c;lr=on><br>Record-Route: <sip:sbc.intelligentsupport.eu:5061;transport=tls;ftag=dcea3c9546914ff8826afca13260da1c;lr=on><br>Record-Route: <sip:sip-du-a-us.pstnhub.microsoft.com:5061;transport=tls;lr><br>From: Phillip Kyriacou<sip:+35722010058@sip.pstnhub.microsoft.com:5061;user=phone>;tag=dcea3c9546914ff8826afca13260da1c<br>To: <sip:+35796552237@sbc.intelligentsupport.eu:5061;user=phone>;tag=as63d965d3<br>Call-ID: 43f0f0be2fa05b408c81736dbe392aef<br>CSeq: 1 INVITE<br>Server: MediaGW V1.0<br>Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE<br>Supported: replaces, timer<br>Session-Expires: 1800;refresher=uas<br>Contact: <<a href="http://sip:+35796552237@82.102.42.52:5060" target="_blank">sip:+35796552237@82.102.42.52:5060</a>><br>Content-Type: application/sdp<br>Require: timer<br>Content-Length: 339<br><br>v=0<br>o=root 601931926 601931926 IN IP4 82.102.42.52<br>s=ASTERISK<br>c=IN IP4 82.102.42.52<br>t=0 0<br>m=audio 16360 RTP/SAVP 0 8 101<br>a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:IyrJsjVV0w5ORJQ3OJB0r8iyRZU+1lMjg4i9vzC2<br>a=rtpmap:0 PCMU/8000<br>a=rtpmap:8 PCMA/8000<br>a=rtpmap:101 telephone-event/8000<br>a=fmtp:101 0-16<br>a=maxptime:150<br>a=sendrecv<br>||||||||||||||||||||<br>====================<br></div></div>
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