[asterisk-users] Ring back when free?

[Tony Mountifield]

In article <1207306647.18787.24.camel at faraz-desktop>,
Faraz R. Khan <faraz.khan at emergen.biz> wrote:
> Thinking out loud: write a asterisk call file (when the calling user
> presses 5) which keeps on trying to connect the two. 

I thought about that, but the trouble is, it's not event-driven. It just
keeps on trying until it runs out of retries.

Cheers
Tony

> On Fri, 2008-04-04 at 10:35 +0000, Tony Mountifield wrote:
> > Has anyone here implemented "Ring back when free" in Asterisk?
> > 
> > The way it works in the UK is as follows:
> > 
> > 1. A calls B. B is engaged (busy).
> > 2. A hears "The number you called is busy. To use ringback, press 5"
> > 3. A presses 5, and hears "Your ringback request has been accepted".
> > 4. A hangs up.
> > 5. Later, B hangs up. The system then calls A (if A is now busy, it
> >    waits until A is clear again).
> > 6. If/when A answers, the system calls B on A's behalf and A hears ringing.
> > 
> > Any implementation has to cater for the fact that when B is busy, he
> > could be either the calling or the called party on his current call.
> > If he is the calling party, he will execute 'h' when he clears, but
> > if he is the called party, he won't be in the dialplan to execute 'h',
> > so we need some other way to invoke the ringback (step 5).
> > 
> > Thoughts?
> > 
> > Cheers
> > Tony
> -- 
> Faraz R Khan
> Chief Architect
> Emergen Consulting Pvt Ltd
> +92.21.111.111.320 x200
> www.emergen.biz
> 
> 
> _______________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> 
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
> 


-- 
Tony Mountifield
Work: tony at softins.co.uk - http://www.softins.co.uk
Play: tony at mountifield.org - http://tony.mountifield.org