Network equipment for use in the telecommunications and cable television industries, namely, digital optical gateways in the nature of optical transceivers, digital link extenders in the nature of fiber optic network extenders, wavelength division multiplexers (DWDM), erbium-doped fiber amplifiers (EDFA), and optical switches; Digital optical gateways, namely, optical transceivers; Digital optical data transport equipment, namely, digital optical data links; Multiplexers; Computer network optical switches; Digital link extenders in the nature of fiber optic network extenders; Digital link amplifiers in the nature of optical signal amplifiers; Digital optical signal amplifiers

'amplifi':41,80,87,91 'cabl':9 'comput':63 'data':54,60 'digit':13,22,46,52,58,67,78,88 'divis':34 'dope':39 'dwdm':36 'edfa':42 'equip':2,56 'erbium':38 'erbium-dop':37 'extend':24,32,69,77 'fiber':29,40,74 'gateway':15,48 'industri':11 'link':23,61,68,79 'multiplex':35,62 'name':12,49,57 'natur':18,27,72,83 'network':1,31,64,76 'optic':14,20,30,44,47,50,53,59,65,75,85,89 'signal':86,90 'switch':45,66 'telecommun':7 'televis':10 'transceiv':21,51 'transport':55 'use':4 'wavelength':33

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