Intrusion security or secure access control system, each system comprising a central processing unit featuring all or some of the following functions - intercom, paging, public address, audio and video surveillance and recording, door lock and light control, motion and intrusion sensors, radio frequency transponder and interrogation devices, alarm and signaling devices

'access':5 'address':26 'alarm':48 'audio':27 'central':12 'compris':10 'control':6,37 'devic':47,51 'door':33 'featur':15 'follow':21 'frequenc':43 'function':22 'intercom':23 'interrog':46 'intrus':1,40 'light':36 'lock':34 'motion':38 'page':24 'process':13 'public':25 'radio':42 'record':32 'secur':2,4 'sensor':41 'signal':50 'surveil':30 'system':7,9 'transpond':44 'unit':14 'video':29

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