BUILDING INTERCOM SYSTEM DOORWAY MACHINE VISUAL INTERPHONE CONTROL SOFTWARE MULTI-DOOR CONTROLLER PATROL INFORMATION COLLECTION MODULE INFRARED HOUSEHOLD ELECTRICAL APPLIANCE CONTROLLER WIRELESS TELECONTROL EMITTER INFRARED INSTRUCTION LEARNING MACHINE VIDEO FREQUENCY SUMMARIZING MACHINE BUILDING INTERCOM DEDICATION POWER SOURCE ALL FUNCTION INTEGRATION INTELLIGENTIALIZED TERMINAL ECONOMY INTELLIGENT INTERCOM MULTIMETER AUTOMATIC LONG-DISTANCE TRANSCRIPTION SYSTEM DIGITAL NETWORK INTELLIGENT CONTROL DATA TERMINAL SYSTEM RESIDENCE NETWORK INTELLIGENT CONTROL DATA TERMINAL SYSTEM MULTIMEDIA HOUSEHOLD INTELLIGENT TERMINAL