BS EN 63044-1. General requirements for Home & Building Electronic Systems (HBES) & Building Automation & Control Systems (BACS). Part 1. General requirements Domestic, Electronic equipment & components, Domestic electrical installations, Building services, Automatic control systems, Domestic facilities, Electrical household appliances, Open systems interconnection, Physical layer (OSI), Data link layer (OSI), Radiofrequencies, Radiocommunication, Data transmission