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在2001年2月9日召开的铁通公司董事会上通过了铁通公司2001年的投资方案。该方案确定了铁通公司网络建设现划,以便实现铁路通信多种业务综合传递。同时将铁路通信专网改造为公众运营网络。其建设改造的主要内容如下。 （1）长途传输网建设。宽带骨干层传输网络由1个核心和4十分支环组成,沿铁路线覆盖有大量业务需求的省会城市和经济发达城市等重要节点、核心环采用40×10Gb/s密集波分复用系统,分支环采用32×25Gb/s密集波分复用系统。宽带骨干传输网总长27875km,需新建光缆总长度3000多km,从而形成
On February 9, 2001, the board of directors of CRC passed the investment plan of CRC in 2001. The program has confirmed the current plan of CRC’s network construction so as to realize the comprehensive transfer of a variety of businesses in railway communications. At the same time transform the railway communication network into a public operation network. The main contents of its construction and renovation are as follows. (1) long-distance transmission network construction. The broadband backbone layer transmission network consists of 1 core and 4 10 branch rings. It covers important nodes such as capital cities and economically developed cities with a large number of business needs along the railway line. The core ring uses a 40 × 10Gb / s dense wavelength division multiplexing system, Branch ring using 32 × 25Gb / s dense wavelength division multiplexing system. The total length of the broadband backbone transmission network is 27875km, and the total length of new optical fiber cables needs to be more than 3000 km to form