HOC (Hone Optical Communications) special fiber optic cable means the optical cables used in special areas or need special structure and materials to meet the application environment. A fiber-optic cable, also known as an optical-fiber cable, is an assembly similar to an electrical cable but containing one or more optical fibers that are used to carry light. This property is useful in myriad technical applications, such as for data transmission in telecommunications, in medical applications, and in lamps and other lighting systems. This Recommendation describes.