Download of gnugk-manual-2.2.0.pdf (gnugk-manual-2.2.0.pdf ( external link: SF.net): 428,270 bytes) will begin shortly. If not so, click link on the left.
The GNU Gatekeeper (GnuGk) is a full featured H.323 gatekeeper under GPL license. It supports VoIP and videoconferencing and includes Radius and database support and many call routing functions.