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<div class="moz-cite-prefix">Hello Brian,<br>
<br>
this Version of Freeswitch is from 09-Feb-2016. So I think, we
should update.<br>
<br>
We need to cover 2 scenarios<br>
<ul>
<li>send fax to SIP Provider(b leg) and have T.38 Re-invite from
SIP Provider and pass it to a-leg</li>
<li>send fax to SIP Provider(b leg), do NOT receive T.38
Re-invite from SIP Provider and then do T.38 Gateway in FS.<br>
</li>
</ul>
And no: We cannot foresee, whether the SIp provider will do T.38
and not. Here in Germany, the main incumbant PSTN provider did not
implement T.38, so it depends on the target number and actual
route, if this will be T.38 or not. A call to a certain number can
be T.38 today and tomorrow it will be T.30 only, as some peering
partner changed the routes in the meantime.<br>
<br>
Best regards<br>
Peter<br>
<br>
<br>
On 02/23/17 20:38, Brian West wrote:<br>
</div>
<blockquote
cite="mid:CAEJMVkDLn2rbBRFSJjViDE8qzi-_OyNpjitQzV5zkpzMtDK_YQ@mail.gmail.com"
type="cite">
<div dir="ltr">What revision of FreeSWITCH are you on? These
behaviors have been solidified in 1.6.15, Sadly MOST of the
details of how it all works is locked up in my head, I've just
not had the time to write it all down and update the
documentation. Can you outline all the scenarios you need to
cover and if you have the ability know ahead of time which one
needs to apply?
<div><br>
</div>
<div>/b</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Feb 23, 2017 at 8:23 AM, Peter
Steinbach <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:lists@telefaks.de" target="_blank">lists@telefaks.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Hello,<br>
<br>
we have the following screnario<br>
<ul>
<li>The caller, a local fax machine (Fax, ATA and
Freeswitch) with T.38, is behind a slow line so
therefore T.38 is needed here</li>
<li>a central Freeswitch fax server serves as a central
gateway to the SIP provider</li>
<li>the SIP provider sometimes reinvites T.38 and
sometimes not.</li>
<li>In case, the SIP provider does NOT answer with T.38,
the central Freeswitch fax server shall act as a T.38
gateway and transcode between local fax (T.38) and SIP
provider (T.30)</li>
<li>In case, the SIP provider does answer with T.38, the
central Freeswitch fax server shall pass T.38 to the
local fax ,machine (T.38)</li>
</ul>
<p>How we set this up<br>
</p>
<ul>
<li>according to the wiki we have a dialplan as follows:
(this is what CLI shows)<br>
</li>
</ul>
<p><tt>Dialplan: <a moz-do-not-send="true"
class="m_4268428807780379530moz-txt-link-abbreviated"
href="mailto:sofia/internalvpn2/49274xxxxx@10.7.0.1"
target="_blank">sofia/internalvpn2/49274xxxxx@<wbr>10.7.0.1</a>
Action set(fax_enable_t38=true)</tt><tt><br>
</tt><tt>Dialplan: <a moz-do-not-send="true"
class="m_4268428807780379530moz-txt-link-abbreviated"
href="mailto:sofia/internalvpn2/49274xxxxx@10.7.0.1"
target="_blank">sofia/internalvpn2/49274xxxxx@<wbr>10.7.0.1</a>
Action set(fax_enable_t38_request=<wbr>true)</tt><tt><br>
</tt><tt>Dialplan: <a moz-do-not-send="true"
class="m_4268428807780379530moz-txt-link-abbreviated"
href="mailto:sofia/internalvpn2/49274xxxxx@10.7.0.1"
target="_blank">sofia/internalvpn2/49274xxxxx@<wbr>10.7.0.1</a>
Action set(execute_on_answer=t38_<wbr>gateway self)</tt><tt><br>
</tt><tt>Dialplan: <a moz-do-not-send="true"
class="m_4268428807780379530moz-txt-link-abbreviated"
href="mailto:sofia/internalvpn2/49274xxxxx@10.7.0.1"
target="_blank">sofia/internalvpn2/49274xxxxx@<wbr>10.7.0.1</a>
Action ring_ready()</tt><tt><br>
</tt><tt>Dialplan: <a moz-do-not-send="true"
class="m_4268428807780379530moz-txt-link-abbreviated"
href="mailto:sofia/internalvpn2/49274xxxxx@10.7.0.1"
target="_blank">sofia/internalvpn2/49274xxxxx@<wbr>10.7.0.1</a>
Action bridge(<a moz-do-not-send="true"
class="m_4268428807780379530moz-txt-link-abbreviated"
href="mailto:sofia/gateway/sip.provider.com/xxxxxxxxxxxxxxx@sip.provider.com"
target="_blank">sofia/gateway/sip.<wbr>provider.com/xxxxxxxxxxxxxxx@<wbr>sip.provider.com</a>)</tt><tt><br>
</tt></p>
<p>In all profiles, we have<br>
<tt><param name="t38-passthru" value="true"/></tt><br>
</p>
<p>In case, the SIP provider does NOT answer with T.38, it
works. The caller's side is reinvited with T.38, the SIP
provider side is T.30<br>
</p>
<p>What the problem is: When the SIP provider' side IS
answering with T.38, then (sometimes, when I send it via
cli from the local freeswitch near the sending fax
machine, it works)<br>
</p>
<ul>
<li>caller initiates a call</li>
<li>call is bridged to the SIP provider' side</li>
<li>we receive a T.38 Reinvite from the SIP provider'
side</li>
<li>Freeswitch sends Trying back to the the SIP
provider' side</li>
<li>Freeswitch logs: set(execute_on_answer=t38_<wbr>gateway
self)<br>
</li>
<li>Freeswitch sends a T.38 Reinvite to the caller,
establishes T.38 on this side.</li>
<li>But the T.38 Reinvite from the SIP provider' side is
not answerered</li>
<li>So the SIP provider' sidehangs up after 10 sec of
timeout.</li>
</ul>
<p>What are we doing wrong here? Is it possible to act as
a t.38 passthrough router and a T.38 gateway in the same
dialplan?<span class="HOEnZb"><font color="#888888"><br>
</font></span></p>
<span class="HOEnZb"><font color="#888888">
<p><br>
</p>
<br>
<pre class="m_4268428807780379530moz-signature" cols="72">--
With kind regards
Peter Steinbach
Telefaks Services GmbH
<a moz-do-not-send="true" class="m_4268428807780379530moz-txt-link-freetext" href="mailto:lists" target="_blank">mailto:lists</a> (att) <a moz-do-not-send="true" href="http://telefaks.de" target="_blank">telefaks.de</a>
Internet: <a moz-do-not-send="true" class="m_4268428807780379530moz-txt-link-abbreviated" href="http://www.telefaks.de" target="_blank">www.telefaks.de</a>
</pre>
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</blockquote>
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<br>
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-- <br>
<div class="gmail_signature" data-smartmail="gmail_signature">
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<p><font face="courier new,
monospace"><b><i><font size="4">Brian
West</font></i></b><br>
<span style="font-size:x-small"><a
moz-do-not-send="true"
href="mailto:brian@freeswitch.org"
target="_blank">brian@freeswitch.org</a></span></font></p>
<p><b
style="font-family:monospace,monospace;font-size:small"><i>Twitter:
@FreeSWITCH , @briankwest</i></b></p>
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<pre wrap="">_________________________________________________________________________
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<pre class="moz-signature" cols="72">--
With kind regards
Peter Steinbach
Telefaks Services GmbH
<a class="moz-txt-link-freetext" href="mailto:lists">mailto:lists</a> (att) telefaks.de
Internet: <a class="moz-txt-link-abbreviated" href="http://www.telefaks.de">www.telefaks.de</a>
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