Short haul modems, short range modems and limited distance modems for use with twisted pair cable and fiber optic cable; data communications test equipment used to test global computer information network access and to simulate telephone network noise and interference; high digital subscriber line modems; asymmetrical digital subscriber line modems; integrated services digital network modems; multiplexers used for the sharing of a common transmission medium, comprising either copper cable or fiber optic cable by a multiplicity of terminals

'access':32 'asymmetr':46 'cabl':16,20,69,73 'common':63 'communic':22 'compris':66 'comput':29 'copper':68 'data':21 'digit':42,47,53 'distanc':9 'either':67 'equip':24 'fiber':18,71 'global':28 'haul':2 'high':41 'inform':30 'integr':51 'interfer':40 'limit':8 'line':44,49 'medium':65 'modem':3,6,10,45,50,55 'multipl':76 'multiplex':56 'network':31,37,54 'nois':38 'optic':19,72 'pair':15 'rang':5 'servic':52 'share':60 'short':1,4 'simul':35 'subscrib':43,48 'telephon':36 'termin':78 'test':23,27 'transmiss':64 'twist':14 'use':12,25,57

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