[asterisk-users] Ring back when free?

[Tony Mountifield]

In article <47F626BF.7090706 at fnords.org>, Eric Wieling <eric at fnords.org> wrote:
> "core show application retrydial"

But that doesn't allow the caller to hang up and get called back. It just
retries while he waits on the line.

> You need to do a "core show applications" and look at what apps are 
> included with Asterisk.

I do, frequently!

Cheers
Tony

> 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
> 
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Tony Mountifield
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