[Freeswitch-dev] fax tone detection inside app

[Chris Burns]

Try using transfer instead of set?

http://wiki.freeswitch.org/wiki/Misc._Dialplan_Tools_fax_detect

On October 15, 2009 05:35:56 pm Peter Volchek wrote:
>  I have just realized, that even though you turned on the fax tone
> detection, the only way to figure it out (whether the tone has been
> detected) is to poll the system variable (fax_tone_detected). In other
> words, if the prompt being played or any other lengthy operation is
> executing, I will not be able to check the variable, till that operation
> finishes.
>
>  More elegant solution to that problem would be the use use of callbacks or
> hooks.
>
>  The following example would demonstrate the idea:
>
>  function fax_session_hook(status)
>     -- fax tone detected, go and save the fax
>     doProcessFax();
>  end
>
>  session:setFaxToneDetectHook("fax_session_hook");
>  playPrompt('greeting');
>
>  -- at this point we are receiving a voice mail
>  session:unsetFaxToneDetectHook();
>  doProcessVoice()
>
>
>  Would it be difficult to implement?
>  PV
>
>  Michael Collins wrote:
>
>
>
> On Wed, Oct 14, 2009 at 1:09 PM, Peter Volchek <pvolchek at voicemobility.com>
> wrote:
>
> Could you provide with some examples how to do it within lua script,
> please? I was not able to find any examples myself,
>
>
>
>  session:execute("tone_detect", "fax 1100 r +5000 set
> 'fax_tone_detected=true' 1")
>
>  Then check for the value of the channel variable fax_tone_detected and act
> accordingly. -MC