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

[Mauro Sergio Ferreira Brasil]

Hello there!

First of all, I would like to apologize if I'm making some question that 
was already been answered on some place else.
On such a case, can you please direct me to a good source of information ?

We intend to start using Asterisk on our backend and we will certainly 
need to make some implementation in order to integrate it with our 
legacy backend servers.
The first and main issue we will face is to intercept call setup (mostly 
for SIP calls, but for incoming/outgoing calls from PSTN too), so we can 
accept the call considering autentication/autorization rules, facilities 
availability, and other limitations.

The better option is to customize Asterisk without change it's internal 
code, creating a module or using another interface or API.
Is that possible ?

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.

Can you guys, please, give me a lead on that ?

Thanks and best regards,

-- 
__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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