[Asterisk-Users] (newby) EURO-ISDN line question

[Cosmin Prund]

Mabe I didn't understand your answer, mabe I did not ask the question
properly, so I'll try an other aproach:

Let's say I've got a "*" and a client calls it's number. Note this number
would not be SIP, it would be the "old" kind of number. My only choice would
be to use ISDN or analog. Under certain circumstances (when I know I can't
pickup the phone) I want the calling client to get an "busy" tone, not a
"ring". I want it to look just like any other busy tone to the client. The
"Congestion" command in Asterisk seems to require "Answer" first, and I
don't want to Answer the line!

>From a different thread (How to remove first ring tone on FXO?) I understood
one can't do anything before the calling party gets the first ring, so I
figure I can't reject the call ither. Also I have never seen a standard
phone that has a "cancel" button that works as the one on GSM phones. From
all this I concluded that there's no way to "reject" the call on an FXO port
(analog line).

Back to my question: Did I draw the wrong conclusion from then " How to
remove first ring tone on FXO?" thread? Is it actually possible to reject a
call on a standard analog line? If not, is it possible to reject a call on a
digital EURO-ISDN line?

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
> bounces at lists.digium.com] On Behalf Of Olle E Johansson
> Sent: Wednesday, February 01, 2006 2:24 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] (newby) EURO-ISDN line question
> 
> Cosmin Prund wrote:
> > The way I understand things, there's no way for a analog line to
> "reject" a
> > call (give the caller an busy tone) if the line is not actually busy.
> >
> That is totally under the control of you in the dialplan. You send busy
> or congestion or answer the calls as you see fit, either by sending a
> call to another the device and following the state of that call leg, or
> by simply rejecting the call in the dialplan directly.
> 
> This is regardless of protocol.
> 
> /O
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