You should take a look to ENUM protocol:
http://www.voip-info.org/wiki/view/ENUM. It could provide a decentralized
and simple solution for your requirements.
Regards
-----Mensaje original-----
De: asterisk-users-bounces(a)lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] En nombre de Joao Pereira
Enviado el: miércoles, 30 de noviembre de 2005 18:45
Para: serusers(a)lists.iptel.org; asterisk-users(a)lists.digium.com
Asunto: [Asterisk-Users] hierarchical VoIP system
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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