[asterisk-users] Any way of "flattening out" 2 channels back into one?

Richard Mudgett rmudgett at digium.com
Sun Jul 29 08:16:36 CDT 2018

On Sat, Jul 28, 2018 at 4:08 PM, Jonathan H <lardconcepts at gmail.com> wrote:

> Last question for today, I promise!
> The problem: In order to disconnect calls after x minutes, I need to do
> this:
> [setup]
> exten => setup,1,Answer()
>     same => n,Set(LIMIT_PLAYAUDIO_CALLER=yes)
>     same => n,Set(LIMIT_WARNING_FILE=/var/lib/asterisk/sounds/en_GB_TNS/
> time_limit_reached)
>     same => n,Dial(Local/s at root/n,3,L(3540000:60000))
>     same => n,Hangup()
> [root]
> exten => s,1,Verbose(1,Call to: ${CALLERID(name)} from: ${CALLERID(num)})
> same => n,Set(CHANNEL(hangup_handler_push)=hdlr1,s,1)
> etc etc
> Works well, but the result is it looks like there are 2 active calls
> in the console. Is there any way of forcing the drop of a call after x
> minutes without doing this "double dialling" business?

Heh.  This is similar to the example given describing local channel
optimization [1] and
what happens to state information on those channels when local channels
optimize out.

The "call" counter you mention from the CLI "core show channels" output is
approximation and is not very accurate.  Asterisk has no concept of what a
"call" is.
That counter simply counts the number of channels that started PBX's to
dialplan normal.  In your dialplan you have two channels that do this and
thus two
"calls" are counted.

If you want to eliminate the "double dialing" business avoid using local
channels.  Have your
incoming PJSIP channels call other PJSIP channels directly.  Or you can
make it so the
local channels can optimize themselves out.  Remember you cannot have state
stored on an optimizing local channel as that information goes away when
the local
channels optimize out.

The Dial 'L' option currently puts state on the caller and called channels
depending on which
features are configured (who hears things).  If you set the verbose level
to 4 you get information
in the log about that.


[1] https://wiki.asterisk.org/wiki/display/AST/Local+Channel+Optimization
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