electric power distribution machines; rotary converters; phase modifiers; distribution boxes for electrical power; electrical connection boxes; electric relays; electrical components in the nature of protection relays; electric wires and cables; optical fibers; optical fiber cables; fiber optic couplings; junction boxes; metal cabinets specially adapted to protect telecommunications equipment in the nature of fiber optic cables; 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-to-the-home and ethernet-over-VDSL access aggregators, terminators and repeaters, and remote presence management products, namely, switches, and console, alarm, sensor and power management devices; electronic and optical communications instruments and components, namely, optical transmitters, optical receivers, optical transceivers, digital transmitters, optical data links, communication link testers for testing communication links; telecommunications and data networking hardware, namely, devices for transporting and aggregating voice, data, and video communications across multiple network infrastructures and communications protocols; fiber optic instruments, namely, fiber optic transport systems comprising optical transmitters and optical receivers