I just take this opportunity to gain understanding of tone_detect app.
Is it possible to detect cadence with the combination of timeout and hits parameters? An actual case using FreeTDM/Dahdi:

Ringing tone is given 425 Hz 1 sec on and 4 secs off. But a busy tone is 0.5 sec on and 0.5 sec off. The congestion at faster cadence 0.25 sec on and 0.25 sec off - although it's no longer important to disconnect a call.

Or anybody can lead me to a better solution? Thank you.

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On Wed, Jul 24, 2013 at 9:56 AM, Anthony Minessale <anthony.minessale@gmail.com> wrote:
Its relative to the leg of the call that the app is executed on. Most things in FS are specific to call legs.



On Tue, Jul 23, 2013 at 8:44 PM, Karl Schmidt <karl@xtronics.com> wrote:
On 07/23/2013 06:59 PM, Anthony Minessale wrote:
> rw flag is listen to read stream or write stream in or out

I figured that, I suppose this sounds dense (and of course I've seen the wiki page), but every call
has data from two ends - in two directions - 4 data streams (or more) so is read reading both
incoming streams? or is it from the perspective of the caller (probably?) or the callie(probably not).

> there is no OR its always AND

What I thought.

> if single tone sets it off then you might need more hits.  Tone detection is imperfect.

I think I was close to 100% modulation - I moved to

  <action application="tone_detect" data="busy-pan 350,440 w 0 hangup 2>

and it works..



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