Ключевые слова: access, alarm, apartment, authorized, building, button, buttons, camera, combination, control, customer, device, dial, digital, door, doorway, electric, electronic, enter, entrance, entry, facade, guest, home, house, intercom, keyboard, keypad, lock, metal, metallic, modern, number, old town, outside, panel, password, protection, safety, security, security camera, sign, system, talk, technology, video, video intercom, video security, voice, wall,