[asterisk-dev] Dialplan pre-bridge handlers

Joshua C. Colp jcolp at sangoma.com
Mon Jul 20 09:29:35 CDT 2020

On Fri, Jul 17, 2020 at 6:04 AM Nikša Baldun <it at voxdiversa.hr> wrote:

> Hello,
> I have been using Asterisk for years, and the one thing that I believe
> is sorely missing, but I can't find any mention of it on the Internet,
> and that is pushable pre-bridge handlers. In current setup, there are
> following limitations:
> 1. Pre-bridge handler can only be attached to the B-leg channel, not the
> A-leg channel.
> 2. The handler will only be executed before a bridge resulting from Dial
> application, but a channel can be bridged multiple times during its
> lifetime (by SIP attended transfer, for example).
> So, for example, if I want to turn call recording on/off depending on
> who the channel is bridged to, there is no way to do that via dialplan
> (that I know of).
> There is a possibility to attach hangup handlers to any channel by using
> CHANNEL(hangup_handler_push), but no similar feature for pre-bridge
> handlers, which are much more important, IMO. So, has there been any
> discussion among developers about this topic?

I can't say I've heard anyone request or discuss such a thing anywhere.
That being said it sounds at face value like it could be useful.

Joshua C. Colp
Asterisk Technical Lead
Sangoma Technologies
Check us out at www.sangoma.com and www.asterisk.org
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