DATA, VIDEO AND VOICE TRANSMISSION AND SWITCHING SYSTEMS COMPRISED OF OPTICAL SIGNAL ELEMENTS, NAMELY, OPTICAL SIGNAL AMPLIFIERS, OPTICAL SIGNAL DEMULITPLEXERS, DIGITAL CROSS-CONNECT SWITCHES, OPTICAL FIBERS, FIBER OPTICAL CABLES, OPTICAL FILTERS, OPTICAL SIGNAL GENERATORS, LASERS NOT FOR MEDICAL PURPOSES, OPTICAL SIGNAL MULTIPLEXERS, RECEIVERS, OPTICAL SIGNAL REGENERATORS, TRANSMITTERS; TELECOMMUNICATIONS SWITCH SYSTEMS COMPRISED OF COMPUTERS; COMPUTER WORKSTATIONS, AND MICROPROCESSORS; NETW...