(The difference between optical cable, optical fiber and cable, communication optical cable is a kind of communication line in which a certain number of optical fibers form a cable core according to a certain method, which is covered with a sheath, and some are also covered with an outer sheath to realize optical signal transmission. Communication optical cables have larger transmission capacity than copper cables, long relay distance, small size, light weight, and no electromagnetic interference. Since 1976, they have developed into long-distance trunk lines, urban relays, offshore and transoceanic submarine communications , as well as the backbone of wired transmission lines for local area networks, private networks, etc., and began to develop into the field of user loop distribution networks in the city, providing transmission lines for fiber-to-the-home and broadband integrated service digital networks.)
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