A CATV system for a guest facility such as a hotel including a monitor installed in each room of the facility, an activator for activating the monitor with a signal sent from the front office of the facility, a sensor for detecting a guest who has entered the room and comes close to the monitor, and...http://www.google.fr/patents/US4802022?utm_source=gb-gplus-shareBrevet US4802022 - Cable TV system for guest facilities
