[Asterisk-Dev] double dtmfs

[duncan]

A client of mine is experiencing "double DTMF's" occasionally when using an 
IVR application (written in AGI) hosted on my Asterisk server 
(E100P).  They dont seem to be able to reproduce the problem for me, but it 
seems that this is occuring only from German mobiles.  Its worth noting I 
have several other applications running on the server which work fine and 
never suffer from DTMF problems (mainly from Dutch telephones, but also 
some English phones (both mobile and landline)).

Is there way to investigate this more?  Has anyone else had problems with 
double DTMF's from German mobiles?  Does anyone have any success stories of 
using German mobiles without encountering DTMF problems?

Thanks


duncan