Hi guys,

an idea will be to use the b2bua module in OpenSIPS to send first the 
call to an announcement server (asterisk, yate, freeswitch, sems) and 
when getting a BYE to create a new call leg to the final destination 
(the PSTN GW).

That is a simple scenario with a b2bua script - 
http://www.opensips.org/Resources/B2buaTutorial

Regards,
Bogdan

Andreas Sikkema wrote:
> On May 15, 2010, at 3:35 AM, Albert Paijmans wrote:
>
>   
>> Thanks for the reply. The reason we do not want to use Asterisk, but SEMS, 
>> is because SEMS offers the possibility to play a different announcement 
>> (could be from database) to every extension. This ofcourse makes it more 
>> attractive to our sponsors. We want to do both sponsor messages for outgoing 
>> calls and we will have some discreet advertisement on our website. We think 
>> we can offer free phonecalls to most international destinations thanks to 
>> Open Source and we are all volunteers :)
>>
>> So forwarding calls to Asterisk and using Asterisk as a media server for 
>> voicemail or busy tones I understand that part. But how could I send 
>> outgoing (pstn) calls to SEMS first and then to Asterisk? Is there something 
>> like a service route for this?
>>     
>
> The dialplan in Asterisk is much much much more flexible than a lot of people 
> seem to realize. It's in some ways quite a powerful programming language, 
> although it does have weaknesses (some larger than others). And since you 
> already have an Asterisk in the callpath it seems to me to be superfluous to 
> add another element, that will just make things a lot less reliable.
>
> You can do conditional branching and database queries from the dialplan, 
> that's all the power required to create a variable experience for each call. 
> It just takes a little lateral thinking and some tinkering. If you want to 
> you could use an AGI script, but I always feel like that being a cop-out, 
> it's more fun to do it from the dialplan.
>
> Now, let's get back to OpenSIPS ;-)
>
>   


-- 
Bogdan-Andrei Iancu
www.voice-system.ro


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