[asterisk-users] DTMF from TDM400P and X100P

[Tzafrir Cohen]

On Fri, Mar 02, 2007 at 09:36:28AM -0800, Yuan LIU wrote:
> With one IVR payment system, I noticed quite a difference in DTMF 
> transmission between these two cards.  The IVR missed nearly all digits 
> from X100P, while receiving digits from TDM fine.
> 
> Since neither card process or synthesize audio, what can the difference be?

(At least the TDM400P actually has a hardware TDMF detector, but it is
not used, AFAIK)

> 
> (This particular IVR has problem with some regular phone devices, too.)

audio quality?

listen to the audio with e.g. ztmonitor.

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               Tzafrir Cohen       
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