H

optical communication systems and components, comprising communications apparatus and appliances, namely - optical transmitters; optical receivers; amplifiers; preamplifiers; power supplies; status monitoring and control units, computer hardware, and software; splitters; combiners; communication access nodes for use in wide area networks, local area networks, cable networks, and broadband networks; digital compression units and computer hardware and software; modulation units; broadband, high speed data delivery units, software, and computer hardware; headend controllers, monitors, compression devices, multiplexers, scramblers, modulators and transmission devices; transmission units for use with broadband networks, namely optical fiber, cable, satellite, and wireless networks; headend units, computer hardware, and software for the management and transmission of data; broadband network interfaces; network element management units, computer hardware, and software; and manuals and parts related thereto