asterisk users - Feb 2007 - Detecting answer with an analogue card

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.

Hi,

On Sun, 2007-02-04 at 16:17 +0100, Stefano Corsi wrote:
> 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?
you cannot. it's analogue, no signalling is done on it.

unless you write dsp routines to detect the right things
at the right moment :)

if you want exact cdr records, you must go digital.

greetings,
matteo.