fiber optics and fiber optic connecting equipment, namely, fiber optic cable, optical terminal boards, connectors, adapters, jumpers, patch cords and patch panels; optical-electronic and electro-optical measuring instruments, namely, optical power meters and optical loss testers, stabilized light sources, optical time domain reflectometers; and devices for fiber optic technology, namely, optical talk sets, optical clip-on couplers, optical modems, and transceivers