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An undersea fiber optic cable stretching from China to the United States in a loop system more than 25,000 kilometers underwater

admin2012-01-19  51
问题     An undersea fiber optic cable stretching from China to the United States in a loop system more than 25,000 kilometers underwater will soon expand China’s links with the world. The cable is expected to be completed in the year 2000.
    This new fiber optic technology system will transmit voice, data and images at up to a total of 80 gigabits per second. The capacity of 80 gigabits per second is a massive speed advance on previous technology, and allows the transmission of more than one million calls simultaneously.
    (61) The $1.5 billion China-US Cable Network, as it is called, provides a digital connection between China and the US, and overcomes the small fiber optic capacity which has been available, and which, among other things, affects the ability to expand Internet capacity. (Currently all links are via satellite). China Telecom has been trying for some time to set up a direct link with the US and this cable is a key project for the ninth Five-Year Plan. China Telecom is also keen to own some of the fiber capacity to reduce its costs.
    The cable will form a self-protecting ring with direct conncetions between Bandon, Oregon and San Luis Obispo, California on the west coast of the United States, and Shanghai and Shantou in China. There will be additional sub-landings in Japan, Korea and Guam.
    (62) This amazing breakthrough in fiber optic technology for China is a joint investment by many carriers including, but not limited to, China Telecom, AT & T, Sprint, Cable & Wireless, and NTT.
    (63) The cable will be used for all communications such as telephone line services including Internet connections and e-mail links. Each of the investors will have the right to use capacity on the cable, depending on how much they reserve through the cable consortium.
    (64) Internet, while no doubt taking a portion of the cable, is not the primary motivation for building the cable. Expansion of all communication services and overall quality is driving all international systems. The Internet, however, is beginning to take a disproportionate amount of capacity, and this will definitely drive some new pricing structures for Internet Service Providers and end-users over the next couple of years.
    There are already major fiber optic systems connecting China to the rest of the world through Japan (which is then connected to other Pacific cable systems), Korea (not currently available for use by North American carriers) and Guangzhou-Hong Kong. From Hong Kong, cables are also available through Singapore, Thailand, Vietnam and Taiwan.
    (65) Most of these cables can be patched or linked to other global or Asia-Pacific cable systems, giving China access through fiber optic technology to most of the world from the international gateways. The largest operators of cables in Asia are the cable managers Singapore Telecom, KDD in Japan, and the US companies Cable & Wireless and AT&T.
    The APCN cable from Singapore to Japan already has a capacity of 65 Gbps but the new China-US Cable Network with its capacity of 80 Gbps will show the world the way of the future.
选项
答案这个被称为中美光缆网络的系统造价15亿美元，可以用来进行中美之间的数码联系，并且可以解决小型光纤系统负载量小所带来的许多问题-其中之一就是影响因特网的增容能力。
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