fiber interconnection cable; fiber optic cables; protective sheaths for fiber optical cables; electrical terminal boxes; Metal cabinets specially adapted to protect telecommunications equipment in the nature of fiber optic cables; fiber optic cable connectors; terminal connectors for telecommunication lines; audio cable connectors, splitters and plugs; coaxial cable splitters; fiber optic connectors; fiber optic couplers; junction sleeves for fiber optics; nonlinear optical fibers; optical fiber telecommunications apparatus; cables for electrical and optical signal transmission; battery testers; rectifiers; circuit breakers; electric storage batteries; Optical fibers; Signal splitters for electronic apparatus; optical fibers protection systems consisting primarily of microduct, optical cable, and connectors; fiber optic cable assemblies, namely, fiber optic connectors and fiber optics; fiber optic connectors and fiber optic adapters for telecommunication purposes; fiber optic enclosures; transceivers; batteries for electrical backup systems for commercial and industrial purposes; electrical connectors for junction boxes; junction boxes; low voltage power supplies; electronic combiners for connecting antennas and receivers; cables for optical signal transmission; optical amplifiers; optical power meters; optical receivers; optical transceivers; optical transmitters; dynamometers