Electronic and optical communications instruments and components, namely, communication link testers for testing communication links; Fiber optic cables; Fiber optic instruments, namely, optical fiber identifiers; Optical fiber connectors; 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 eth...