From: Tzafrir Cohen <[EMAIL PROTECTED]>
Date: Fri, 2 Mar 2007 22:14:09 +0200
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?
You mean from DAC? That could make sense - altough the MODEM function X100P
is designed for would require it to be fairly accurate. DTMF itself is one
of basic MODEM functions.
listen to the audio with e.g. ztmonitor.
Thanks for the input. Have yet to put a sound card with TDM. (The IVR in
question is not my machine.) I suspect that ztmonitor listens to the
digital output, though.
Yuan Liu
--
Tzafrir Cohen
icq#16849755 jabber:[EMAIL PROTECTED]
+972-50-7952406 mailto:[EMAIL PROTECTED]
http://www.xorcom.com iax:[EMAIL PROTECTED]/tzafrir
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