[Freeswitch-users] How to enable Hardware DTMF detection (Dahdi/Digium card)

Steve Underwood steveu at coppice.org
Tue Apr 24 18:10:45 MSD 2012

On 04/24/2012 07:46 PM, Haythem Horbit wrote:
> Hi,
> We experience some issues to capture SIA ContactID messages from an 
> alarm system, with Freeswitch,
> the problem is that some DTMFs are missed randomly, so that we can't 
> have a correct message
> we use a Digium card 'AEX2400' with DAHDI drivers, the alarm system is 
> connected to an FXO port.
> We see in the freeswitch log that software DTMF detection is enabled, 
> may be the issue comes from this fact...
> So our question is: how can we enable hardware DTMF detection in DADHI 
> configuration with freeswitch,
> and how to disable software DTMF detection in freeswitch
Does your card have one of those octasic echo canceller modules? Those 
things are a menace.


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