Nicer box with all the money saved from free software? =p<div><br><br><div class="gmail_quote">On Mon, Jan 9, 2012 at 10:48 AM, Michael Collins <span dir="ltr">&lt;<a href="mailto:msc@freeswitch.org">msc@freeswitch.org</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">FWIW,<div><br></div><div>When experimenting with outbound voice broadcasting and trying to detect SIT tones, I stumbled across a factoid that might help, depending on your locale. In North America, whenever I hit an answering machine or a cell phone voicemail system the beep almost always was detected by my SIT tone detects. It was a total accident that I even found it. IIRC, the 1776.7 Hz tone was the one that almost always detected an answering machine/voicemail beep. </div>

<div><br></div><div>No guarantees that it will work, but it&#39;s probably worth investigating. If it handles 90% or more of your targets then it&#39;s at least as good as any other type of detection you&#39;ll find.</div>
<span class="HOEnZb"><font color="#888888">
<div><br></div></font></span><div><span class="HOEnZb"><font color="#888888">-MC</font></span><div><div class="h5"><br><br><div class="gmail_quote">On Mon, Jan 9, 2012 at 7:26 AM, Ken Rice <span dir="ltr">&lt;<a href="mailto:krice@freeswitch.org" target="_blank">krice@freeswitch.org</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">




<div>
<font face="Monaco, Courier New"><span style="font-size:11pt">Detecting the tone is exactly what mod_vmd and mod_avmd do now... Not exactly the most efficient way to detect this sort of thing, but it does work<span><font color="#888888"><br>


<br>
K</font></span><div><div><br>
<br>
<br>
On 1/9/12 9:22 AM, &quot;curriegrad2004&quot; &lt;<a href="http://curriegrad2004@gmail.com" target="_blank">curriegrad2004@gmail.com</a>&gt; wrote:<br>
<br>
</div></div></span></font><blockquote><div><div><font face="Monaco, Courier New"><span style="font-size:11pt">Since an answering machine creates a tone, have you looked into mod_spandsp&#39;s tone_detect feature? I think it does what you want it to do.<br>


<br>
On 2012-01-09 3:50 AM, &quot;Avi Marcus&quot; &lt;<a href="http://avi@avimarcus.net" target="_blank">avi@avimarcus.net</a>&gt; wrote:<br>
</span></font><blockquote><font face="Monaco, Courier New"><span style="font-size:11pt">Yes, even with no other way of making it work more efficiently... 1<br>
machine can handle 50 calls that have actually picked up, before<br>
sending it to the recording.<br>
So your actual window is maximum 30? seconds per calls that picks up<br>
that mod_avmd needs to be running. So then that&#39;s 50 per 30 second<br>
windows so 100 calls per minute. That&#39;s 1,000 actual connected calls<br>
within 10 minutes. Is that within your threshold? For using ONE<br>
machine?<br>
(What happens if a person picks up? On silence it just starts the<br>
recording..? Or do you just have a looping first 30 seconds so it&#39;s ok<br>
if they miss the start?)<br>
<br>
-Avi<br>
<br>
<br>
On Mon, Jan 9, 2012 at 12:06 PM, Anita Hall &lt;<a href="http://anita.hall@simmortel.com" target="_blank">anita.hall@simmortel.com</a>&gt; wrote:<br>
&gt; Hi David<br>
&gt;<br>
&gt; Question: Do you want to use only 1 machine for doing AMD on 1k+ calls ? If<br>
&gt; not, you can distribute the load between 2 or more machines.<br>
&gt;<br>
&gt; Have you tried this? (from Wiki)<br>
&gt;<br>
&gt; For best results in getting accurate detection as well a saving system<br>
&gt; resources (CPU &amp; memory), you should do the following:<br>
&gt;<br>
&gt; Wait until AFTER the call has been answered before starting AVMD. In many<br>
&gt; cases you may find it best to wait a few seconds after the call is answered<br>
&gt; before starting AVMD.<br>
&gt;<br>
&gt; Starting AVMD before the call is answered will often result in false beeps<br>
&gt; and wastes CPU resources.<br>
&gt;<br>
&gt; Once you have received the AVMD event, you should explicitly stop AVMD, even<br>
&gt; though it will not return another event.<br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt; regards,<br>
&gt; Anita<br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt; On Sun, Jan 8, 2012 at 7:20 AM, David Stein &lt;<a href="http://dstein@ieee.org" target="_blank">dstein@ieee.org</a>&gt; wrote:<br>
&gt;&gt;<br>
&gt;&gt; Hello.<br>
&gt;&gt;<br>
&gt;&gt; I need to detect answering machine beeps on 1,000+ channels<br>
&gt;&gt; simultaneously.  Unfortunately, this is a real requirement, not a<br>
&gt;&gt; pseudo-requirement that can be engineered away.  This is for a mass<br>
&gt;&gt; emergency notification system for government, K-12, and higher education..<br>
&gt;&gt;<br>
&gt;&gt; In the past, I have done this with proprietary hardware (Dialogic and<br>
&gt;&gt; Aculab), which handles this sort of thing without overloading the host CPU,<br>
&gt;&gt; as the hardware&#39;s DSPs handle the detections.  I want to see if I can do the<br>
&gt;&gt; same thing with FreeSWITCH.<br>
&gt;&gt;<br>
&gt;&gt; Alas, I find the following warning in the wiki page for mod_avmd:<br>
&gt;&gt;<br>
&gt;&gt; AVMD (and VMD) are both very CPU intensive. You need to be aware of this<br>
&gt;&gt; fact when using it. It will drastically reduce your call capacity if you do<br>
&gt;&gt; not manage it correctly. On the other hand it is a very useful tool, and if<br>
&gt;&gt; managed properly will be a great aid for calls needing to do Voice Mail<br>
&gt;&gt; Detection.<br>
&gt;&gt;<br>
&gt;&gt;     Eric states, &quot;You can expect about ~50 simultaneous instances on an<br>
&gt;&gt; Intel i7 920 CPU.&quot;<br>
&gt;&gt;<br>
&gt;&gt; So, it sounds like VMD and AVMD won&#39;t work for what I need to do.  I also<br>
&gt;&gt; don&#39;t think that the tone_detect application will work, as this requires<br>
&gt;&gt; specific frequencies (as opposed to ranges of frequencies), and answering<br>
&gt;&gt; machines and voicemail come with beeps at all sorts of frequencies.<br>
&gt;&gt;<br>
&gt;&gt; Does anyone know anything, either free or commercial, that I can use with<br>
&gt;&gt; FreeSWITCH to do this many simultaneous detections?  I know of commercial<br>
&gt;&gt; software-only platforms (e.g., Aculab&#39;s  Prosody S) that claim to be able to<br>
&gt;&gt; this, so it seems like it should be possible.<br>
&gt;&gt;<br>
&gt;&gt; Thanks in advance,<br>
&gt;&gt; David Stein<br>
&gt;&gt;<br>
&gt;&gt;<br>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>Anthony Minessale II<br><br>FreeSWITCH <a href="http://www.freeswitch.org/">http://www.freeswitch.org/</a><br>ClueCon <a href="http://www.cluecon.com/">http://www.cluecon.com/</a><br>
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