[asterisk-app-dev] ARI dial application

[Joshua Colp]

Paul Belanger wrote:

<snip>

>
> So, how would that look in ARI?
>
> Answer channel
> invoke originate (far end answers)
> create bridge
> move channel A and B into bridge
>
> Right?
>
> Some differences I can see right from the start, in the ARI example
> caller A does not hear ringback, with app_dial they would. So my
> questions are:
>
> When does app_dial indicate ringing to the channel?

When ringing is received from the dialed end it is then indicated to the 
caller within app_dial. Of course if there are multiple dialed parties 
then it uses a bit more intelligence.

> When does app_dial create the bridge? Does caller A live in the bridge
> before Caller B is answered?

app_dial creates a bridge upon answer and bridges the two. HOWEVER 
before the remote end has answered there is a pseudo bridge implemented 
inside of app_dial which exchanges media so early media works.

>
> If you had to do this in ARI, how would you do it? Because, what I'd
> like to do, is come up with the spec for it, write it, then see about
> making a few simple demos for different languanges.

Right now you can't directly replace app_dial with an ARI equivalent 
because of early media. There is no way to do anything with a channel 
until it has answered and no way to exchange early media.

-- 
Joshua Colp
Digium, Inc. | Senior Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - US
Check us out at: www.digium.com & www.asterisk.org