[Asterisk-Users] Re: how to execute something after Dial() ?

[Tony Mountifield]

In article <431860FF.6040903 at gmail.com>,
Simone Cittadini <mymailforlists at gmail.com> wrote:
> So I may use the "h" extension, but also from the wiki :
> 
> Use with great care: Apparently some channel variables get destroyed 
> when the call is hung up, and those variables aren't available anymore 
> (or have inconsistent values) when the h extension is being called. 
> Therefore you shouldn't rely on this special extension for 
> billing/calling card purposes.
> 
> So? how can I have the update AGI reliably executed even if the calling 
> hangups first ?

That warning looks too non-specific and based on fearful hearsay.  I would
respond to it: "show me the code, and say which variables are affected."
If it's true, it is a bug that needs fixing. Or perhaps it just used to
be, and got fixed.

I have used DeadAGI in the h extension to do tidyup and logging with no
problems at all. The channel variables I created while the call was being
set up (e.g. CALLID) have always been available while processing h, and h
is invoked even if it is the caller that hangs up.

The thing that you should *never* do in the 'h' extension is call Hangup
itself, since I have found that can cause 'h' to get invoked again. I have
seen the incorrect and unnecessary example of "exten => h,1,Hangup" far
too many times.

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