In 1976, the Bell Institute of the USA built the first fiber optics communication speculative system in Atlanta, utilizing an optical cord including 144 optical fibers made by Western Electric. In 1980, business optical cables constructed from multimode fiber optics started to be made use of on inter-office trunk lines as well as a few long-distance lines in the city. Business optical wires constructed from single-mode fiber optics began to be used on long-distance lines in 1983. In 1988, the initial transatlantic submarine cable television linking the USA and Britain and also France was effectively laid, and also soon the first transatlantic submarine cable was developed. China developed its very own communication optical cable television in 1978, which used multi-mode optical fiber with a stuck core framework. Field examinations have been executed together in Shanghai, Beijing, Wuhan and various other places. Not long after, it was tried out as an inter-office trunk in the neighborhood telephone network. After 1984, it was gradually used for long-distance lines, as well as single-mode fiber was embraced. Interaction optical cords have higher transmission capability than copper cables, with lengthy relay areas, tiny size, light weight, and also no electro-magnetic interference. Because 1976, they have actually created long-distance trunk lines, intra-city relays, offshore and also transoceanic submarine communications., In addition to the backbone of wired transmission lines such as neighborhood location networks and also exclusive networks, and also started to create into the area of user loop distribution networks in the city, providing transmission lines for fiber-to-the-home and also broadband integrated service digital networks.

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