[Asterisk-Users] Zaptel TDM questions

[Rich Adamson]

I'll jump in here with a couple of comments...

What you're trying to deal with is detecting "answer supervision" for the
outbound call, and not all telco's provide that. Since there is a wide
variation (in and out of the US), asterisk does not try to detect when a
call has been answered. It considers that outbound call answered as sson
as it is done dialing.

What does your telco provide to you on analog pstn lines for answer
supervision?

There is a high probability your telco isn't providing anything. In some
cases, the telco can turn options for this but you still need to know
what they are going to send to you. Could be a tone or simple reversal
of tip/ring voltage.


> Yes, we have an applications that needs to detect the actual answer of the call not when it is 
ringing.
>  
> CCF
> 
>     I think the Asterisk must answer the call to be able to then dial out on the second port.  
This is what happens on any other PBX I have
>     worked with in this sort of scenario.  Is this a problem for you?
>      
>     Angus
>      
>      
>         Hello,
>          
>         I have a TDM04B. I make a call into the first port of the card. Once asterisk receive 
the call, it will make another call out using the
>         second port.
>         From what i have observerd as soon as the called party on the second port starts ringing 
asterisk show the following :
>          
>         -- Zap/2-1 answered Zap/1-1
>          
>         Any idea why asterisk thinks the call has been answered while actually the phone is 
still ringing?
>          
>         Anybody know how to avoid asterisk to answer the call while ringing?
>         Also, I have no Answer or any Playback command in the dial plan before making a call out 
of second port. I have also try setting
>         callprogress to yes/no but the results are the same.
>