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<div>Can’t it be a NAT problem? The IP address where the bye is coming from doesn’t seem a pstnhub to me.</div>
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<div class="ms-outlook-ios-signature" id="ms-outlook-mobile-signature"><a href="https://aka.ms/o0ukef">Outlook voor iOS</a> downloaden</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>Van:</b> Users <users-bounces@lists.opensips.org> namens volga629 via Users <users@lists.opensips.org><br>
<b>Verzonden:</b> Saturday, April 18, 2020 11:01:19 PM<br>
<b>Aan:</b> OpenSIPS users mailling list <users@lists.opensips.org>; Alexey Vasilyev <alexei.vasilyev@gmail.com><br>
<b>Onderwerp:</b> Re: [OpenSIPS-Users] ms teams ACK</font>
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<p><font face="Cantarell">Hello Alexey,</font></p>
<p><font face="Cantarell">Thank you on reply,</font></p>
<p><font face="Cantarell">I undone all changes regard headers changes and MS Teams send BYE directly to asterisk.<br>
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<p><font face="Cantarell">No Route header present.</font></p>
<p><font face="Cantarell">But INVITE ACK 183 180 all travel with proper routing information.<br>
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<p><font face="Cantarell">2020/04/18 17:54:28.599711 190.109.70.77:5060 -> 190.109.68.250:5060<br>
BYE <a class="x_moz-txt-link-freetext" href="sip:11988582770@190.109.68.250:5060">
sip:11988582770@190.109.68.250:5060</a> SIP/2.0<br>
FROM: <a class="x_moz-txt-link-rfc2396E" href="sip:551120999838@190.109.70.77"><sip:551120999838@190.109.70.77></a>;tag=4d7fb0763c224e39a13a03c669c4b387<br>
TO: <a class="x_moz-txt-link-rfc2396E" href="sip:11988582770@190.109.70.77"><sip:11988582770@190.109.70.77></a>;tag=as41e97ff5<br>
CSEQ: 3 BYE<br>
CALL-ID: <a class="x_moz-txt-link-abbreviated" href="mailto:2e6c1a8d2383a4752403e94512ced077@190.109.70.77">
2e6c1a8d2383a4752403e94512ced077@190.109.70.77</a><br>
MAX-FORWARDS: 69<br>
Via: SIP/2.0/UDP 190.109.70.77:5060;branch=z9hG4bK050e.e400e373.0;i=66c9c603<br>
VIA: SIP/2.0/TLS 52.114.14.70:5061;rport=8208;received=52.114.14.70;branch=z9hG4bK9594cd7<br>
REASON: Q.850;cause=18;text="fcb37a2a-4bc4-49b6-a5e3-aabddc8f7a22;Call Controller timed out while waiting for acknowledgement."<br>
CONTACT: <a class="x_moz-txt-link-rfc2396E" href="sip:52.114.14.70:8208;nat=yes;x-i=fcb37a2a-4bc4-49b6-a5e3-aabddc8f7a22;x-c=b5841f98785c5819bb99e57cd0fa7d86/s/1/9b6ba2f8eefa4a67bed29609fd1884ec">
<sip:52.114.14.70:8208;nat=yes;x-i=fcb37a2a-4bc4-49b6-a5e3-aabddc8f7a22;x-c=b5841f98785c5819bb99e57cd0fa7d86/s/1/9b6ba2f8eefa4a67bed29609fd1884ec></a><br>
CONTENT-LENGTH: 0<br>
USER-AGENT: Microsoft.PSTNHub.SIPProxy v.2020.4.13.7 i.ASSE.3<br>
ALLOW: INVITE,ACK,OPTIONS,CANCEL,BYE,NOTIFY<br>
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<p><font face="Cantarell"><br>
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<p><font face="Cantarell">volga629<br>
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<div class="x_moz-cite-prefix">On 4/18/20 5:13 PM, Alexey Vasilyev wrote:<br>
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<blockquote type="cite">
<pre class="x_moz-quote-pre">Hi volga629,
There were nothing special for ACK. You don't need to change
To/From/Contact. All the necessary steps were in the article
<a class="x_moz-txt-link-freetext" href="https://blog.opensips.org/2019/09/16/opensips-as-ms-teams-sbc/">https://blog.opensips.org/2019/09/16/opensips-as-ms-teams-sbc/</a> and for most
people it still works.
So I'm not sure, that MS changed anything, because all the hardware SBCs
should change behaviour, so they need new firmware. SBC vendors should
inform customers to update etc. So this is not so simple process. And it
definitely make no sense for anybody.
And in the test lab for the article I've used absolutely the same
architecture with asterisk, the only difference was RTPEngine to transcode
SRTP-RTP.
And within test lab I've tested not only calls, but transfers worked fine
too.
-----
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Alexey Vasilyev
--
Sent from: <a class="x_moz-txt-link-freetext" href="http://opensips-open-sip-server.1449251.n2.nabble.com/OpenSIPS-Users-f1449235.html">http://opensips-open-sip-server.1449251.n2.nabble.com/OpenSIPS-Users-f1449235.html</a>
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