The invention relates to a stand-alone video recording, playback and Monitoring system. It has network switches, non-volatile storage devices, IP cameras, video servers, and NTSC cameras. The system uses communication channels that are WAN/LAN based and can be hard-wired or wireless....http://www.google.com/patents/US8117252?utm_source=gb-gplus-sharePatent US8117252 - Video-monitor/recording/playback system
