OpenH323Proxy is a Gatekeeper and Proxy for Video Conferencing and
Internet Phone (VoIP) applications using the H323 protocol.

The H323 protocol is used by OpenH323, OhPhone and Microsoft's NetMeeting
plus many other applications.

It makes use of PWLib and the OpenH323 stack from Equivalence Ltd Pty
and as it is based on OpenGatekeeper from Egoboo, it is a
gatekeeper as well as a proxy.

WWW: http://openh323proxy.sourceforge.net/

and

WWW: http://www.openh323.org/