[asterisk-app-dev] Handling transfers with ARI

Wed Dec 23 15:04:52 CST 2020

That’s what I do, it works without fail

From: asterisk-app-dev <asterisk-app-dev-bounces at lists.digium.com> On Behalf Of Iván Aponte
Sent: Wednesday, December 23, 2020 12:59 PM
To: Asterisk Application Development discussion <asterisk-app-dev at lists.digium.com>
Subject: Re: [asterisk-app-dev] Handling transfers with ARI

Hello, 

I usually create a context in  the dialplan to transfer the calls then in the code I use :

channel.continueInDialplan({
          context: 'transfer_ctx',
          extension: extensionToCall
        })

Hope this helps

On Wed, Dec 23, 2020 at 2:46 PM Phil Mickelson <phil at cbasoftware.com <mailto:phil at cbasoftware.com> > wrote:

Unfortunately, I suspect my situation is different from yours in that I control everything.  And, when Bob wants to transfer the call he clicks a button on the screen, not a button on the phone.  I don't use any part of the dialplan except to start ARI.

Sorry.

Phil

On Wed, Dec 23, 2020 at 2:56 AM Jean Aunis <jean.aunis at prescom.fr <mailto:jean.aunis at prescom.fr> > wrote:

Thanks for the answer.

Not sure I get the idea : when a SIP phone performs a blind-transfer, I have no control over what Asterisk does with the channels. During my tests, Bob's channel was automatically pulled out of the bridge, and replaced with a Local channel whose peer goes through the dialplan to the transfer destination.

How can you link the newly created Local channel with Alice's one ?

For the moment, I have a piece of solution with the BridgeBlindTransfer event, but I still have troubles with these Local channel issues.

Le 22/12/2020 à 20:13, Phil Mickelson a écrit :

Not sure if this will help but what I do is fairly simple.  A couple of things: 

1.  This is all written in JS using Node.js.

2.  I use ari-client from npm.

To me this is very simple.  You already have the bridge and channel setup for Alice.  I create another channel that dials Charlie.  And, as soon as the create channel call comes back I just set the channel id (was Bob) in the bridge to the new channel for Charlie.  That's it.  If it doesn't get answered I hope it goes to VM.  However, that's the downside of a blind transfer.  I have some code in there for what happens if Alice hangs up before Charlie answers, etc but that's because I keep track of every call in my system.

And I wrote all of this before there were Promises and Async/Await.  Hopefully next year I'll have the time to rewrite the whole thing.

And, for the people at Asterisk who came up with the idea of ARI.  Thank you soooo much.  Hope everyone has a wonderful holiday and that 2021 is much better than 2020!

Phil

On Tue, Dec 22, 2020 at 5:38 AM Jean Aunis <jean.aunis at prescom.fr <mailto:jean.aunis at prescom.fr> > wrote:

Hello,

I'm struggling to find a way to properly handle blind transfers with ARI.

This is my use case :

- Alice calls Bob through Asterisk

- dialing and bridging is done with ARI

- when Bob blind-transfers to Charlie, I would like to use the 
"redirect" ARI operation, or the Transfer application

But here is the issue : since the channels are stasis-managed, 
transferring is done with Local channels which remain in the path, so 
Transfer and redirect have no effect on them. And Alice's channel is not 
aware that it is being transferred.

Has somebody already dealt with this ?

Regards,

Jean

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Iván Aponte
Office: +58(212)9923193
Mobile: +58(412)2774713

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