A method and an apparatus for upgrading an existing service outlet (e.g. LAN, telephone, power or CATV outlet) in a house by adding functionality thereto. The functionality is added by an add-on module, connected electrically and secured mechanically to the existing outlet. Several attachment devices...http://www.google.de/patents/US7881462?utm_source=gb-gplus-sharePatent US7881462 - Outlet add-on module
