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The door access control system provides authorized individuals or companies with secure and reliable enter and exit services. Access control systems for doors can control and determine who, when, and where they can enter the appropriate area.          The applications range of access control systems is from single door access control systems to large network access control systems for multiple doors buildings. It is an effective measure to solve the security management of important departments’ entrances and exits. Applicable to various confidential departments, such as office, hotel, apartment, parking lot, armory, confidential room, intelligent community, and factory.                                                                   The access control system has already surpassed the simple doorway and key management, and it has gradually developed into a complete access control management system. It plays a greater role in the administrative work of work environment security and personnel attendance management.