[Asterisk-Users] ISDN BRI and UK Premium Rate Numbers

[John Daragon]

Faris Raouf wrote:
> Can anyone help point me in the right direction please?
> 
> I'm based in the UK and I want to start using a Premium Rate number with
> Asterisk - I think the equivalent in the US would be a "900 number".
> Effectively the caller pays much more to call such a number than a
> normal national or local call.
> 
> The problem with these is that I don't want Asterisk to actually signal
> to the telephone network that the call has been answered until someone
> really does answer it, otherwise the caller will be paying a premium
> rate just to listen to an Asterisk-generated ring tone until someone
> answers the call.

This is pretty standard Asterisk behaviour

exten =>   <whatever>,1,NoOp
exten =>   <whatever>,2,Dial(SIP/<n>&SIP/<n+1>&SIP/<n+2>....)
exten =>   <whatever>,3,Hangup

The incoming ISDN call will ring the specified SIP phones, and will not
be answered until one of them picks up.


Snip


> Ideally I'd also like the caller and the person answering the call to
> hear a recorded message saying that calls to this number cost X per
> minute ... blah blah...., this message being triggered only when someone
> answers the call. This will warn the caller *and* the person answering
> that this is a premium-rate call. The person answering the call will
> know to speak after this message has been played. But that's just an
> ideal situation. Right now I'm more concerned about how to stop Asterisk
> answering until someone is available to take the call.


Hmmmm ... sorry, no idea how to do this bit - I believe it's a
requirement that's been addressed before by implementing a MeetMe
conference, but my recollection is hazy...