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<p>Hello,</p>
<p>do you see the m= line for fax in the INVITE sent to Asterisk,
something like:</p>
<p>m=image ... udptl t38</p>
<p>Maybe you can share incoming and outgoing INVITE for the fax call
that doesn't work.</p>
<p>Cheers,<br>
Daniel<br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 05.01.19 06:39, <a class="moz-txt-link-abbreviated" href="mailto:yu@yu-boot.ru">yu@yu-boot.ru</a> wrote:<br>
</div>
<blockquote type="cite" cite="mid:1546666782.559666173@f22.my.com">
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<p style="margin-top: 0px;" dir="ltr">Yet again, fighting against
strange fax behavior on Kamailio. When call is routed from
device behind Kami and uplink is plain old Mediant2000 gateway
to E1, T.38 always correctly established via reinvite and fax
works perfectly.</p>
<p dir="ltr">When call is routed to anything else including local
Asterisk or Freeswitch, seems called don't hear fax noises and
quickly throw BYE to me. Asterisk just don't see anything about
UDPTL. Even more confusing, "near" device drops a call when
detects fax tones from Asterisk or Yate.</p>
<p dir="ltr">What can it be? SDP seem to be all transformed as
they should be, I cant see anything wrong or different on SIP
dumps.</p>
<p dir="ltr">Rtpproxy is on bridge mode. Local device is
Audiocodes MP118 and on private addressing, another end of Kami
is on static IP. Voice calls work perfectly on this
configuration.</p>
<p dir="ltr">I can provide anything configs dumps etc, if it will
help to solve this issue.</p>
<p dir="ltr">Anyone using rtpproxy bridge and working T.38? Help
me please.<br>
</p>
<div id="mail-app-auto-default-signature">
<p dir="ltr">--<br>
sent from myMail for Android</p>
</div>
<br>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda">www.linkedin.com/in/miconda</a>
Kamailio World Conference - May 6-8, 2019 -- <a class="moz-txt-link-abbreviated" href="http://www.kamailioworld.com">www.kamailioworld.com</a>
Kamailio Advanced Training - Mar 4-6, 2019 in Berlin; Mar 25-27, 2019, in Washington, DC, USA -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a></pre>
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