[ILUG] Asterisk and DTMF recognition

[Niall O Broin]

I recently setup an Asterisk server which is the first one I have  
setup using an analog line card (a cheap clone). Works nicely  
(ignoring the fact that a Grandstream phone refuses to register to  
it, but that's another issue) but it seems to have issues recognising  
DTMF tones to navigate menus - sometimes it will, sometimes it won't.  
Does anyone have any idea what that might be?

I have googled, but find only reports of people having similar  
problems, for various reasons. It's like a dream to me that I once  
read that this can be an issue with clone FXO cards, but google  
hasn't been able to find that reference for me, so perhaps it WAS a  
dream :-)


Niall