[asterisk-users] Detecting answer with an analogue card

[Stefano Corsi]

Hello,

I have two TDM2400 card with some 40 FXS modules and 4 FXO modules. I 
would like use analogue lines for outboud calls.
How is it possibile to detect ANSWER?

- answeronpolarityswitch does not seem to work in Italy
- call progress does not give safe results, sometimes calls get 
billed, sometimes not

Am I forced to buy an ISDN adapter or could there be a solution 
(maybe tweaking some configuration parameter...)?

Thanks and best regards
Stefano C.