TEN-STATION INTER-COM UNIT, PROVIDING SELECTIVE SIGNALING AND INTER-COMMUNICATING CAPABILITY BETWEEN STATIONS ON CONVENTIONAL PUSH-BUTTON TELEPHONE KEY SYSTEMS, THE UNIT PROVIDING INDEPENDENT TALKING CURRENT AND DUAL TONE MULTI-FREQUENCY SELECTIVE SIGNALING IN SUCH SYSTEMS

'button':22 'capabl':15 'com':6 'communic':14 'convent':19 'current':31 'dual':33 'frequenc':37 'independ':29 'inter':5,13 'inter-com':4 'inter-commun':12 'key':24 'multi':36 'multi-frequ':35 'provid':8,28 'push':21 'push-button':20 'select':9,38 'signal':10,39 'station':3,17 'system':25,42 'talk':30 'telephon':23 'ten':2 'ten-stat':1 'tone':34 'unit':7,27

KT-10X

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