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Hello. <br>
<br>
I need to detect answering machine beeps on 1,000+ channels
simultaneously. Unfortunately, this is a real requirement, not a
pseudo-requirement that can be engineered away. This is for a mass
emergency notification system for government, K-12, and higher
education. <br>
<br>
In the past, I have done this with proprietary hardware (Dialogic
and Aculab), which handles this sort of thing without overloading
the host CPU, as the hardware's DSPs handle the detections. I want
to see if I can do the same thing with FreeSWITCH. <br>
<br>
Alas, I find the following warning in the wiki page for mod_avmd: <br>
<blockquote>AVMD (and VMD) are both very CPU intensive. You need to
be aware of this fact when using it. It will drastically reduce
your call capacity if you do not manage it correctly. On the other
hand it is a very useful tool, and if managed properly will be a
great aid for calls needing to do Voice Mail Detection.<br>
<br>
Eric states, "You can expect about ~50 simultaneous instances
on an Intel i7 920 CPU." <br>
</blockquote>
So, it sounds like VMD and AVMD won't work for what I need to do. I
also don't think that the tone_detect application will work, as this
requires specific frequencies (as opposed to ranges of frequencies),
and answering machines and voicemail come with beeps at all sorts of
frequencies. <br>
<br>
Does anyone know anything, either free or commercial, that I can use
with FreeSWITCH to do this many simultaneous detections? I know of
commercial software-only platforms (e.g., Aculab's Prosody S) that
claim to be able to this, so it seems like it should be possible. <br>
<br>
Thanks in advance, <br>
David Stein<br>
<br>
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