[Freeswitch-users] Detect answer on FXO device

[Michael Collins]

Not reliably. The VAD might detect "We're sorry, you have reached a number
that is disconnected..." and consider that an "answer." You might possibly
be able to use the spandsp tone detect stuff to listen for ringback and
then act accordingly if you no longer hear ringback, but that's a scary
scenario. You are better off figuring out why the ATA isn't working in the
first place.

-MC

On Thu, May 17, 2012 at 6:23 AM, cristian re <cristian.re.work at gmail.com>wrote:

> The ATA has both "call answer supervision" and "polarity reversal" but
> they doesn't works worldwide but only with some carriers.
> Is there a way to delegate this job to Freeswitch? using voice activity
> detection?
>
> Cristian
>
>
> >Technically, answer detection is the job of the ATA. The problem is that
> it
> >is an inexact science. I would look in the GXW docs to see if they have a
> >section on 'answer supervision'. It might also be in a section along with
> >'disconnect supervision.'
> >
> >-MC
>
>
>
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