[Asterisk-Dev] DTMF Pass through (Transparently)

[Steve Underwood]

Ronald Hartmann wrote:

> Good Day Developers,
>
>  
>
>             Thanks for all you do for asterisk.
>
>  
>
>             I am desperately seeking your advise on DTMF Passthrough.
>
>  
>
>             I have an application where DTMF Signalling must be 
> received exactly the same way it was transmitted.
>
Then your application is pretty well broken. *Many* things do not pass 
DTMF with the original timing - cellular networks, many digital 
keysystems, etc.

>              The problem is that asterisk is listening and then when 
> it hears DTMF it retransmits the DTMF.  Is it possible
>
>             To get the DTMF to be transparently passed through?  If 
> not are any of you able or willing to offer your expertise for hire?
>
If you use u-law or A-law, and don't have problems with dropped packets, 
you can pass the DTMF transparently. It won't work with lower bit rate 
codecs, though. No consulting can fix that.

Regards,
Steve