[Asterisk-biz] answering machine detection

[Preston Garrison]

Thanks for the urls, maybe i'll see if i can code something like that.  
  Since i was hoping for someone working on the code, -dev is the best 
place for this.  Especially since I plan on developing the code myself, 
one way or another :)


Preston Garrison
direct: 877-748-4142
fax: 310-774-3901
cell: 623-748-4140

-----Original Message-----
From: alex at pilosoft.com
To: Commercial and Business-Oriented Asterisk Discussion 
<asterisk-biz at lists.digium.com>
Sent: Wed, 2 Mar 2005 13:16:27 -0500 (EST)
Subject: Re: [Asterisk-biz] answering machine detection

On Wed, 2 Mar 2005 alex at pilosoft.com wrote:

> > Has anyone worked on any code or have any experience doing answering
> > machine detection.  Someone I was talking to was telling me 
something
> > like normal callers do more mhz? :)  Which I assume maybe they mean
> > that a normal caller sends higher frequencies since its not
> > pre-recorded.  However I am wonder if the codec compression would
> > remove that.  Anyone out there have any experience with coding such
> > things or using them?
> No. There's a "standard" tone for answering machine (the "beep") - 
that
> can be detected. I doubt you can do any kind of detection simply based
> on voice frequency patterns.
>
> This is not a -dev thing either ;)
Have to correct myself. Apparently it *is* possible to detect based on
voice frequency patterns.

http://www.stratasoft.com/resources/docs%5Cwhite%20papers%5CAnswering%20Machine%20and%20SIT%20Detection.pdf

http://www.databasesystemscorp.com/acdreports.htm


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