[asterisk-dev] Integration with legacy systems ...

[Mauro Sergio Ferreira Brasil]

Thanks a lot for your answer Kevin, we agree with the approach you 
pointed and we are having a good look on SIP proxies as suggested by you.

But, let's consider that we need for some reason to implement this 
functionality on Asterisk.
Having a initial look on everything it provides, I've noticed that is 
there quite a number of entry points, like: build applications, build 
modules, AMI, AEL, AGI, etc.

Considering what I've exposed on prior message, can you please give me a 
hint on some good approach ?

For example: create an AGI application, and call it from the dialplan to 
decide whether the caller (that will be a SIP "friend") can make such a 
call.
This example can provide dynamic dial for each call some pbx extension 
initiates, right ?

I found on Internet a module step-by-step creation example that 
registrates a callback to handle CDR's.
Is there a similar form to registrate a callback to intercept call setup 
events ?

I'll need to update dialplan dynamically with new extensions and 
contexts that will be created for an specific Asterisk instance all the 
time on this backend solution.
AEL is the one for this job ?

Please give me just a few words so I can have a lead on where to look for.

Thanks and best regards,
Mauro.




Kevin P. Fleming escreveu:
> Mauro Sergio Ferreira Brasil wrote:
>
>   
>> Which is the better choice when talking about call setup interception ?
>> For example: 1- We will need to request autentication and validate it on
>> our legacy backend, so we need to intercept SIP/REGISTER; 2- On the same
>> way, any outgoing INVITE will need to be handled in order to validate if
>> the user have autorization to call another internal number, or enough
>> credit to establish outgoing calls.
>>     
>
> That really sounds like a job for OpenSER/OpenSIPS/Kamailio/etc., which
> are SIP proxies you can put in between existing systems and add your own
> logic to manipulate requests and responses. While you could do that with
> Asterisk, it's much harder and won't be very transparent.
>
>   

-- 
__At.,                                                                                                                             
   _
 
*Technology and Quality on Information*
Mauro Sérgio Ferreira Brasil
Coordenador de Projetos e Analista de Sistemas
+ mauro.brasil at tqi.com.br <mailto:@tqi.com.br>
: www.tqi.com.br <http://www.tqi.com.br>
( + 55 (34)3291-1700
( + 55 (34)9971-2572

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