voice and data communication systems comprising apparatus for transmitting and networking digital and analog communications over private and/or public transmission facilities, data flow control modules, electronic switching apparatus, data processing apparatus and integrated circuits

'analog':14 'and/or':18 'apparatus':7,28,31 'circuit':34 'communic':4,15 'compris':6 'control':24 'data':3,22,29 'digit':12 'electron':26 'facil':21 'flow':23 'integr':33 'modul':25 'network':11 'privat':17 'process':30 'public':19 'switch':27 'system':5 'transmiss':20 'transmit':9 'voic':1

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