Looks like modem_connect_tones_rx is the module... it's simple to plug that into a media bug.<br><br><br><div class="gmail_quote">On Thu, Apr 14, 2011 at 1:58 PM, Steve Underwood <span dir="ltr"><<a href="mailto:steveu@coppice.org">steveu@coppice.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="im">On 04/15/2011 01:32 AM, Christopher Rienzo wrote:<br>
> 2100 Hz is the ANS tone from the receiving side of the fax call.<br>
> That's what I detect on my outbound calls.<br>
</div>An answering machine sends 2100Hz, but its very unreliable to rely on<br>
hearing it. In spandsp there is a module which does a much more thorough<br>
job of detecting a FAX machine. It will accept the V.21 preamble, which<br>
normally follows the 2100Hz tone, as a substitute for the 2100Hz itself.<br>
That way a call which starts passing audio a bit late (which they often<br>
do) still results in proper FAX detection. We need to expose that<br>
functionality in FreeSwitch, but have not done so yet.<br>
<font color="#888888"><br>
Steve<br>
</font><div><div></div><div class="h5"><br>
<br>
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