[Asterisk-Users] How to avoid collect calls on ISDN BRI trunks?

[C F]

If you get ANI2 then you should be able to determine that it is a
collect call and just do busy or congestion. In any case you can ask
your provider to not allow collect calls.

On 7/12/05, Armin Schindler <armin at melware.de> wrote:
> On Tue, 12 Jul 2005, Dhennys Pestana wrote:
> > Hello, Armin!
> > Flash() should issue a flash for a few milliseconds, just like flash button on
> > some analog phones.
> > As far as I know (based on Google and AsteriskBrasil.org search), it works only
> > on ZAP channels for now.
> > I found out Flash() runs smoothly on analog channels when receiving calls with
> > FXO interfaces (like Intel537 modems).
> > I'm not an ISDN expert, but if there's any way to add this feature to the CAPI
> > level I'm pretty sure most ISDN users would love it. :)
> 
> I know the 'flash' on analog lines, but I don't know what kind of
> information must be sent on ISDN lines to 'emulate' this.
> I will try to find out, but maybe someone here can help out.
> 
> A bug-report (or feature-request) on the sourceforge site of chan_capi-cm
> would be nice ;-)
> 
> Armin
> 
> > ----- Original Message -----
> > From: "Armin Schindler"
> > To: "Dhennys Pestana"
> > Cc: <asterisk-users at lists.digium.com>
> > Sent: Tuesday, July 12, 2005 8:48 AM
> > Subject: Re: [Asterisk-Users] How to avoid collect calls on ISDN BRI trunks?
> >
> >
> > On Tue, 12 Jul 2005, Dhennys Pestana wrote:
> > > I need to block collect calls on my PBX.
> > >
> > [...]
> > >
> > > By using ZAP channels with HFC ISDN cards, it's possible to use Hangup() and
> > > Flash() commands, which won't do any good on CAPI channels because it will
> > > hangup the call immediatelly.
> > >
> > [...]
> >
> > Yes, because Hangup() means 'disconnect'.
> >
> > I'm not aware of Flash() and what it is doing, but it is surely not
> > implemented in chan_capi.
> > If someone can tell me what Flash() is supposed to do, we can implement it
> > in chan_capi-cm.
> >
> > Armin
> >
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