[asterisk-users] DTMF from TDM400P and X100P

[Yuan LIU]

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?

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

Yuan Liu