<br><br><div class="gmail_quote">2009/2/10 David Backeberg <span dir="ltr"><<a href="mailto:dbackeberg@gmail.com">dbackeberg@gmail.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="Ih2E3d">On Mon, Feb 9, 2009 at 4:23 PM, Olivier <<a href="mailto:oza-4h07@myamail.com">oza-4h07@myamail.com</a>> wrote:<br>
> Hi,<br>
><br>
> I would like to improve my understanding of T.38.<br>
<br>
</div>I recommend you try out Asterisk 1.6 if you want to play with T.38.<br>
I DID get asterisk-1.4 working with fax, but I was having a lot of<br>
issues with faxes dropping in weird ways. All of those issues went<br>
away when I upgraded to 1.6. Don't waste your time like I did.</blockquote><div><br>I can see what you mean, now, since I'm trying hard to understand how Asterisk 1.4 is working with T.38.<br><br>At the moment, not only fax is not really working but I even get aborted voice calls because of "415 unsupported media" !<br>
It seems Asterisk keeps advertising T.38 support to callee endpoint though this endpoint is configured in sip.conf to accept only alaw !!<br>Endpoint is configured with :<br>t38pt_udptl=no<br>t38pt_rtp=no<br>t38pt_tcp=no<br>
disallow=all<br>allow=alaw<br>canreinvite=no<br><br>So I must be misunderstanding what t38pt_udptl=no means.<br>Maybe it simply means "if t38pt_udptl=yes, then use this type of T.38, else use another type of T.38" and setting t38pt_udptl=no is not enough to prevent an endpoint to receive T.38 offers ...<br>
<br>Or maybe it's a bug ...<br><br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
<br>
app_fax in asterisk-1.6 is very, very nice and worked great for me. It<br>
works with traditional analog fax as well as T.38. I have to say I'm<br>
impressed and grateful for all who contributed to this.<br>
asterisk-1.6 also has a better SIP stack and other improvements.<br>
<br>
Rather than trying to get 1.4 working with this, I strongly recommend<br>
reading the directions at:<br>
<a href="http://www.voip-info.org/tiki-index.php?page=Asterisk%20T.38" target="_blank">http://www.voip-info.org/tiki-index.php?page=Asterisk%20T.38</a><br>
to build asterisk-1.6 with app_fax support<br>
<br>
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