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

[Armin Schindler]

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
>