Amplifiers; Ethernet adapters; Ethernet cables; Ethernet controllers; Ethernet repeaters; Ethernet switches; Ethernet transceivers; Computer apparatus, namely, a converter that superimposes an Ethernet signal on an existing cable; Electric power converters; Telecommunications equipment, namely, fiber-optic transceivers, fiber optic repeaters, converters and optimizers, wave division multiplexers, free-space optics transmission systems, switches including Ethernet switches and routers, fiber-t...