[Asterisk-biz] answering machine detection

[alex at pilosoft.com]

On Wed, 2 Mar 2005, Preston Garrison 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 ;)

-alex