[asterisk-users] Capturing call Reject/Decline events on a PRI line

[Ishwar Sridharan]

Richard,

I tried calling the same number outside of Asterisk, by making direct calls
from a landline telephone and a mobile phones. When the user rejected the
call, the call was immediately cancelled.

This implies that for whatever reason, the call reject signal is not
available for asterisk to process, even though the network processes the
event.

We use a digium TE420 card(
http://www.digium.com/en/products/digital/te420.php) to connect to the PRI.
To debug the scenario, how do I do the following:
a. Is there an ISDN signal for call reject/denied?
       I'm sure there is, for reasons explained above.
b. Is my service provider passing along the call reject/denied signal to the
PRI?
c. If the signal is passed along to the PRI, why is the card not recognising
the signal?

Call Reject is a pretty common feature and is in common use everywhere.
There must be a simple way to fix this.

--
Thanks,
Ishwar.

On Mon, Aug 1, 2011 at 7:36 PM, Richard Mudgett <rmudgett at digium.com> wrote:

> > There is no event for Asterisk to recognize. The PROGRESS message just
> > says that there is an audio message available for the caller to listen
> > to. Asterisk just passes the indication to the peer channel and opens
> > the audio path. It is the caller who must recognize any audio message
> > that their call has been dropped.
> >
> > Thanks for the explanation. Any suggestion on how to recognise that
> > the call has been dropped?
> >
> >
> > As far as ISDN is concerned, the
> > call has not been answered yet so Asterisk must keep waiting.
> >
> As far as the ISDN signaling is concerned, the call is still going.
> There is no signaling to indicate the call is not going to proceed
> any further.
>
> Richard
>
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