If you do not care about Asterisk protocol - IAX2, just interested in and IP-PBX using SIP, Go with SIPXEC. It's based on fedora build.

On , "Jared K. Smith" <jsmith@fedoraproject.org> wrote:
> 2010/12/1 Zied Fakhfakh fzied@dottn.com>:
>
> > They want us to talk about the opensource alternatives to their Telco
>
> > studies. Any advice ?
>
>
>
> Have you checked out Asterisk?  It's a very powerful open source
>
> telecommunications engine, and according to a recent survey it
>
> currently powers about 16% of new telecomms deployments in North
>
> America.  There are several other open source telecommunications
>
> engines out there as well, but Asterisk is the one I'm most familiar
>
> with.  (By way of disclaimer, I spent the past five years teaching
>
> Asterisk classes and helping to grow the Asterisk community before
>
> becoming the Fedora Project Leader.)
>
>
>
> --
>
> Jared Smith
>
> Fedora Project Leader
>
> --
>
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>
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>
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>