Electronic and optical communications instruments and components, namely, communication link testers for testing communication links; Fiber optic cables; Fiber optic connectors; Fiber optic instruments, namely, power meters, light sources, optical loss test sets, and optical time domain reflectometers; Fibre optic couplings; Metal cabinets specially adapted to protect telecommunications equipment in the nature of fiber optic cables; Optical fiber connectors; Optical fibers; Optical fibres, te...