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I think perhaps you are the exception rather than the rule.<br>
<br>
Maybe you were able to engineer your network so that fax works without
any of the FoIP protocols - good luck to you if you have. For <i>most</i>
people, it's unlikely they would have sufficient control over their WAN
segment to ensure that it is sufficiently fast and reliable enough for
fax to work reliably.<br>
<br>
In any case, why on earth would you attempt to re-invent the wheel?
T.38 is not only considerably more reliable and robust, it's nowhere <i>near</i>
as bandwidth intensive as G711.<br>
<br>
The original question was regarding using IAXmodem and Hylafax to
receive faxes over a SIP connection. Given that T.38 can not work in
this situation, the simple answer is that it <i>isn't</i> the best
solution.<br>
<br>
<br>
Jonn R Taylor wrote:
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">NOT true and
I have proven that for the
last year.<o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Jonn<o:p></o:p></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"><o:p> </o:p></span></font></p>
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style="font-size: 12pt; color: windowtext;">
<hr tabindex="-1" align="center" size="2" width="100%"></span></font></div>
<p class="MsoNormal"><b><font color="black" face="Tahoma" size="2"><span
style="font-size: 10pt; font-family: Tahoma; color: windowtext; font-weight: bold;">From:</span></font></b><font
color="black" face="Tahoma" size="2"><span
style="font-size: 10pt; font-family: Tahoma; color: windowtext;">
<a class="moz-txt-link-abbreviated" href="mailto:asterisk-users-bounces@lists.digium.com">asterisk-users-bounces@lists.digium.com</a>
[<a class="moz-txt-link-freetext" href="mailto:asterisk-users-bounces@lists.digium.com">mailto:asterisk-users-bounces@lists.digium.com</a>] <b><span
style="font-weight: bold;">On Behalf Of </span></b>Rob Hillis<br>
<b><span style="font-weight: bold;">Sent:</span></b> Tuesday, January
01, 2008
4:13 PM<br>
<b><span style="font-weight: bold;">To:</span></b> <st1:PersonName
w:st="on">Asterisk Users Mailing List - Non-Commercial Discussion</st1:PersonName><br>
<b><span style="font-weight: bold;">Subject:</span></b> Re:
[asterisk-users]
Asterisk 1.4 Fax</span></font><font color="black"><span
style="color: windowtext;"><o:p></o:p></span></font></p>
</div>
<p class="MsoNormal"><font color="black" face="Times New Roman"
size="3"><span style="font-size: 12pt;"><o:p> </o:p></span></font></p>
<p class="MsoNormal"><font color="black" face="Times New Roman"
size="3"><span style="font-size: 12pt;">I'd say "consider yourself
very
lucky". I know I did some testing here some time ago with faxing
over VoIP.<o:p></o:p></span></font></p>
<ul type="disc">
<li class="MsoNormal" style=""><font color="black"
face="Times New Roman" size="3"><span style="font-size: 12pt;">One
extension to another over G711a with both extensions on the same LAN -
worked 95% of the time<o:p></o:p></span></font></li>
<li class="MsoNormal" style=""><font color="black"
face="Times New Roman" size="3"><span style="font-size: 12pt;">One
extension on my Asterisk server to an Extension on a friend's Asterisk
server using G711a via IAX - 95% failure rate. Both of us awere on the
same ISP and had ping times of ~40ms between us.<o:p></o:p></span></font></li>
</ul>
<p class="MsoNormal"><font color="black" face="Times New Roman"
size="3"><span style="font-size: 12pt;">However, in a live
environment, I convert a PSTN call
to a t.38 encoded call and can send the fax just about anywhere I damn
well
want (where the remote end supports t.38) with a 95% success rate.<br>
<br>
t.38 is the key to successful faxing over a VoIP network. Without it,
you're begging for trouble.<br>
<br>
<br>
Doug Lytle wrote: <o:p></o:p></span></font></p>
<pre wrap=""><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;">Jonn R Taylor wrote:<o:p></o:p></span></font></pre>
<pre><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;"> <o:p></o:p></span></font></pre>
<blockquote style="margin-top: 5pt; margin-bottom: 5pt;" type="cite">
<pre wrap=""><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;">If I had ANY failed faxes I would here about it. Iaxmodem creates a log of its own, so when I get a connection that fails hylafax sends the failure to me. One of the things that I found is you need to add nojitterbuffer to the iaxmodem config file, <o:p></o:p></span></font></pre>
<pre><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;"> <o:p></o:p></span></font></pre>
</blockquote>
<pre wrap=""><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;"><o:p> </o:p></span></font></pre>
<pre><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;">Really? I'll have to do some testing, I've never tried since I've read <o:p></o:p></span></font></pre>
<pre><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;">you can't.<o:p></o:p></span></font></pre>
<pre><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;"><o:p> </o:p></span></font></pre>
<pre><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;">Doug<o:p></o:p></span></font></pre>
<pre><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;"><o:p> </o:p></span></font></pre>
<pre><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;"><o:p> </o:p></span></font></pre>
<pre><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;"> <o:p></o:p></span></font></pre>
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