[Serusers] hierarchical VoIP system

[Joao Pereira]

And about the protocol used to create this hierarchical network?
Should I use SIP (routing between SERs) or should I use IAX (routing 
between Asterisks)?

About ENUM, Isnt the managing of the ENUM tree going to be very 
complicated and heavy when we reach the millions of users?

Joao

Jan Saell wrote:

> Hi there!
>
> We have kind of the same setup but are using a few number of SER boxes 
> for the on net calls - using enum for the lookup would be a great idea 
> so that you can get the numbers to do sip calls and move over slowly.
>
> And for the central routing voip server make the routing use SIP 
> redirects as the central server then can handle a lot of calls as its 
> only doing the routing decisions.
>
> Best regards
> jan
>
> --On Wednesday, November 30, 2005 05:45:21 PM +0000 Joao Pereira 
> <joao.pereira at fccn.pt> wrote:
>
>> Hello
>> Im managing a WAN with a lot of Universities. Some of them already
>> installed a VoIP solution based on SER (to manage SIP clients) and
>> Asterisk (for services and PSTN GW). The DNS routing provided by SER is
>> working perfectly, but we want to start routing all calls thru IP
>> transparently.
>> We want our legacy PBXs (that are connected to Asterisk) to forward all
>> calls to IP. The idea is to forward all calls to a central VoIP server,
>> that has all the numbers that already are VoIP enabled, and then:
>> - if the called number is VoIP enabled, he routes the call to that Univ.
>> VoIP server
>> - if the called number isnt in the list, the call goes back to the PBX
>> and a PSTN call is dialed
>>
>> This way, ppl starts using the VoIP infrastructure, without even knowing
>> what VoIP means, and the telecom bill starts decreasing.
>>
>> I know thats a statical and hierarchical structure and we dont want 
>> that,
>> but is a good solution for this migration phase, where a lot of places
>> are still using TDM systems.
>>
>> Now, the top of the hierarchy should be an Asterisk or SER? I dont know
>> which of the systems is the best choice for the job. Does someone has an
>> idea of what should we use?
>>
>> Thanks
>> Joao Pereira
>> www.fccn.pt
>>
>>
>>
>>
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>
>
>
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