Why is fiber so important?

Cable is all kinds of information in today's information society, the main transmission network tools. If the "Internet" as "information superhighway", then, fiber-optic network is the cornerstone of the information highway --- the physical cable network is the Internet routing. Once a block of cable damage and the direction of the "information superhighway" will come to destruction. Through the optical transmission of information, in addition to the usual telephone, telegraph, facsimile, there are now a large number of transmission of a TV signal, bank transfer, stock quotes and other information that moment can not be interrupted. Currently, long-distance communications cable from PDH to SDH transmission development, transfer rate from the original 140MB / S Development to 2.5GB / S, 4 × 2.5GB / S, 16 × 2.5GB / S or even higher, that is, say, a pair of core can be opened 30,000, 120,000, 480,000 or even more so to the road development. Such a large transmission capacity, fiber optic cable to the telecommunications sector, once the block is not only caused huge losses, and because of poor communications, will give the masses a lot of inconvenience, such as computer users can not access, can not know the stock market, banks can not exchange, off-site storage take a bubble, all kinds of information can not be transferred. In remote mountainous areas, once the cable break, will make the county or several counties along the communication cable on the isolated, become an island.