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近年来 ,国内各大运营商纷纷在规划建设全新的全国骨干光传输网络 ,准备迎接加入ＷＴＯ后的电信大战。中国电信已宣布再建设以三个 1 0ＧＤＷＤＭ环状网为主体的全国高速大容量骨干网 ;中国铁通已全面启动以两项 1 0个ＤＷＤＭ环网为主的全国网一期工程 ;中国联通也将建设以 5
In recent years, major domestic carriers have planned and constructed a brand-new national backbone optical transmission network in preparation for the telecom war after joining the WTO. China Telecom has announced the construction of a nationwide high-speed and large-capacity backbone network with three 1 0GDWDM ring networks as the mainstay. China Railcom has already started the first phase of the national network with two 10 DWDM ring networks as the mainstay. China Unicom Will be built to 5