Electronic access control and security system

摘要

The system has local data processors, attached to the access doors, connected to a decentralised communications multiplexer and computer control unit to prevent unauthorised access and to provide status data. A switch or distribution cabinet for communications or data systems (1) has an electrically controlled lock in the form of a data processor on the door (3), connected through a distributed communications multiplexer (DCM) to a control unit CCU which prevents unauthorised opening of the cabinet and provides status data.