前几年，全球各地都兴起了光纤网建设的热潮。然而，一些国家的网络超前建设并没有带来预期的效果，反而造成了带宽的过剩，出现了光纤的泡沫。美国长途光纤网建设状况美国有着全球最大的长途光纤网，９０年代中期以前，美国长途光纤网主要控制在AT＆T、MCI、Sprint三大长途公 A few years ago, the upsurge of optical fiber network construction all over the world started. However, the advance construction of networks in some countries did not bring about the expected results, but instead caused excess bandwidth and the emergence of a fiber-optic foam. US long-distance optical network construction status The United States has the world’s largest long-distance optical network, before the mid-90s, the United States long-distance optical network mainly in AT & T, MCI, Sprint three long-distance