The present invention provides an access control server that holds information pertaining to both network access and facility access. The access control server enforces policies based on location, type of resource, time of day, duration, or other events, and logs all successful and unsuccessful attempts...http://www.google.de/patents/US7437755?utm_source=gb-gplus-sharePatent US7437755 - Unified network and physical premises access control server
Unified network and physical premises access control server