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List: asterisk-dev
Subject: Re: [Asterisk-Dev] PRI rejecting call without B channel
From: Peter Svensson <psvasterisk () psv ! nu>
Date: 2004-07-30 16:45:01
Message-ID: Pine.LNX.4.44.0407301839340.15127-100000 () cheetah ! psv ! nu
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On Fri, 30 Jul 2004, Kevin P. Fleming wrote:
> > A little question... Is it possible using Aserisk to reject an incoming
> > call with a Hangup and a PRI_CAUSE (like fast busy) without actually
> > using a B channel, only at the D channel level?
>
> Unless I'm mistaken B channels are never involved until Asterisk accepts
> and answers the call. Prior to that point all communication related to
> the call is just signalling on the D channel.
Isn't the B channel allocated by the SETUP call in isdn?
The audio channel from the b subscriber to the a subscriber is open (can
be opened?) before the b subscriber sends ANSWER. (I think it is opened
when sending PROCEEDING). You can play customized busy messages etc
without the a subscriber having to pay for the call.
Peter
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