/. [PGP Creator's Zfone Encrypts VoIP]

[coderman]

On 3/15/06, Bill Stewart <bill.stewart at pobox.com> wrote:
> ...
> The basic model is client/server, with servers that can proxy requests to
> other servers,
> where the job of a server is to provide presence service so that
> clients can find each other, and actual media channels are client-to-client.
> (This does mean that you sometimes need to tunnel through NAT and firewalls.)
> Because servers can proxy requests to other servers,
> it's no longer a simple hierarchy model.

there is also TRIP: http://www.voip-info.org/wiki-TRIP
an inter-domain routing protocol for VoIP (like BGP for voice).  for
various political reasons this has never seemed to go anywhere.  i
posted a patch for gcc 3.x a while back if anyone wants to build the
vovida trip daemon on a modern system.