[asterisk-users] Explain AGI and AMI

[Olivier]

Thanks for this explanation : it's now crystal clear !


2007/12/4, Steve Edwards <asterisk.org at sedwards.com>:
>
> On Tue, 4 Dec 2007, Olivier wrote:
>
> > Can anyone explain the difference between Asterisk Gateway Interface and
> > Asterisk Management Interface ? Is it correct to consider AGI scope to
> > focus on call handling and AMI scope to anything which can be done with
> > Asterisk froma loading new modules to originating calls ?
>
> AGI is a protocol for writing your own applications. These applications
> execute as a step or priority in a dialplan similar to Asterisk
> applications like background() or meetme(). They execute in the context of
> a single channel. You can't execute an AGI before you have a call and you
> usually don't have an AGI after the call is hung up (or shortly
> thereafter).
>
> Each AGI executes as a separate process it does not have access to the
> "code" or memory space of the Asterisk process. Thus, you are executing in
> a much more limited environment than an Asterisk application. You also
> can't crash the Asterisk process with a simple coding error.
>
> Think of an AGI (Asterisk Gateway Interface) like you would think of a CGI
> (Common Gateway Interface) in a web server. AGI doesn't define the source
> language you use. You could write an AGI in shell. I use C. A lot of
> people use Perl or PHP.
>
> AMI is a tcp connection to Asterisk. Think of it as a connection to the
> Asterisk command line. You can control a call, but it is not limited to a
> specific call. You can ask Asterisk questions or just sit there and watch
> stuff wiz by :)
>
> Thanks in advance,
> ------------------------------------------------------------------------
> Steve Edwards      sedwards at sedwards.com      Voice: +1-760-468-3867 PST
> Newline                                             Fax: +1-760-731-3000
>
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