A network implemented communication system, comprising a Local Area Network (LAN), a plurality of H.323 endpoints connected to the LAN, each of the endpoints including a communication application for communicating via H.323, at least one H.323 Gatekeeper connected to the LAN for third party control of...http://www.google.fr/patents/US6819665?utm_source=gb-gplus-shareBrevet US6819665 - Private branch exchange implemented using H.323 gatekeeper
Private branch exchange implemented using H.323 gatekeeper
