[Asterisk-Users] strange tone is droping calls

[Matt Riddell]

Anton Krall wrote:
> Hello Guys!
> 
> I have a good one here.
> 
> Has anybody had problems with other PBX and their waiting tones, for
> example, when you are placed on hold, some old PBX have certain tones
> instead of MOH and such.
> 
> Well, I have a client that has one of those and everytime I call him,
> asterisk drops the calls after listening to 4 of those tones because it
> thinks it's a congestion tone.
> 
> Can asterisk be fine tuned to avoid drooping a call for those tones? Or is
> it too complicated?

The problem is that Asterisk is looking at cadences rater than frequencies.
Do you need tone detection for hangup detection or do you get polarity
reversals?  If polarity, you might be able to turn off busydetect and just use
the reversals.

-- 
Cheers,

Matt Riddell
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