INTERCOMMUNICATIONS SYSTEM COMPRISING A CENTRAL CONTROLLER UNIT WITH MICROPROCESSORS, COMPUTER SOFTWARE FOR USE IN STORING MESSAGES, CLASS 2 LOW VOLTAGE POWER SUPPLY AND INPUT/OUTPUT CIRCUITS, INTERCONNECTED VIA WIRE CONNECTIONS TO MULTIPLE DESK AND WALL MOUNTED INTERCOM USER STATIONS FOR VOICE AND DATA COMMUNICATIONS, WITH CIRCUITS FOR CONNECTIONS TO EXTERNAL SWITCHES AND CLASS 2 LOW VOLTAGE INDICATOR LAMPS

'2':18,53 'central':5 'circuit':25,45 'class':17,52 'communic':43 'compris':3 'comput':10 'connect':29,47 'control':6 'data':42 'desk':32 'extern':49 'indic':56 'input/output':24 'intercom':36 'intercommun':1 'interconnect':26 'lamp':57 'low':19,54 'messag':16 'microprocessor':9 'mount':35 'multipl':31 'power':21 'softwar':11 'station':38 'store':15 'suppli':22 'switch':50 'system':2 'unit':7 'use':13 'user':37 'via':27 'voic':40 'voltag':20,55 'wall':34 'wire':28

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