Optical add/drop multiplexers and optical switches for use in wavelength division multiplexed optical communication systems, computer hardware used in connection with such optical add/drop multiplexers and switches, and computer software used to control and monitor optical add/drop multiplexers and switches, and instructional manuals sold therewith as a unit

'add/drop':2,24,37 'communic':14 'comput':16,29 'connect':20 'control':33 'divis':11 'hardwar':17 'instruct':42 'manual':43 'monitor':35 'multiplex':3,12,25,38 'optic':1,5,13,23,36 'softwar':30 'sold':44 'switch':6,27,40 'system':15 'therewith':45 'unit':48 'use':8,18,31 'wavelength':10

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