[asterisk-users] Detecting answer with an analogue card

[Robert Jenkins]

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com 
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
> Tzafrir Cohen
> Sent: 05 February 2007 08:59
> To: asterisk-users at lists.digium.com
> Subject: Re: [asterisk-users] Detecting answer with an analogue card
> 
> On Mon, Feb 05, 2007 at 09:28:52AM +0100, Stefano Corsi wrote:
> > At 19.22 04/02/2007, you wrote:
> > >>>if you want exact cdr records, you must go digital.
> > >>There's still something I don't understand: when using a simple 
> > >>modem on an analog line, you get correct answers from the modem:
> > >>"NO ANSWER", "BUSY", "NO DIALTONE", etc... why is this 
> possible with 
> > >>these TDM2400 cards that cost twenty times as much?
> > >>I know that I'm probably missing something... could you help me 
> > >>understand what?
> > >
> > >Because the far end sends a carrier tone.
> > 
> > Ok, understood.
> > I see there's a call progress detector for Asterisk that 
> seems to work 
> > only with the US telephony system. In fact, when I try to use it in 
> > Italy, results are completely random... it partially works 
> for local 
> > calls that last longer than 20 seconds, but doesn't absolutely work 
> > with call addressed to cell phones, for example. Is there a way to 
> > configure it to work with other telephone systems? Is there someone 
> > who has tried to do it, for example, with the italian 
> telephony system 
> > or some other european telephony system?
> 
> Try patching dsp.c :-(
> 
> There are some tables there. You'll basically need to 
> generate a new progzone.
> 
> -- 
Hi,

Stefano, I can't agree that the line status given by a conventional Modem is
due to the far end carrier, as it only gets that if the call connects...
The general status results (No answer, Busy, No dialtone etc.) are generated
by analysing the standard phone system tones.

Tzafrir,
Have you set the country codes both in Zaptel's config and for the wctdm24xx
module?
It's supposed to be a parameter for the module, but I've not managed to get
that to work.

I change the default country code in wctdm24xxp.c before compiling;
original line (around line 431): static char *opermode = "FCC";
The table of values & codes is around line 153. 

Robert Jenkins.