Cables for optical signal transmission; Computer network adapters, switches, routers and hubs; Electronic and optical communications instruments and components, namely, optical transceivers; Ethernet repeaters; Ethernet switches; Ethernet transceivers; Optical fibers sold as a component of fiber optical cables; Power over Ethernet (PoE) network components in the nature of switches, splitters, midspans, injectors; Telecommunications equipment, namely, fiber-optic transceivers, fiber optic repe...