On Fri, Oct 30, 2009 at 5:06 AM, Fred-145 <codecomplete@free.fr> wrote:

Thanks Meftah for the help. So it looks like an SIP proxy is just to handle
the registration process, while a PBX offers services like ringing phones,
setting up calls, handling voice mail, etc.

Of course, as usual, the lines are getting blurred. Look at opensips.org and see all the crazy things that a good SIP proxy can actually do.
-MC