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从铁路通信网面临的严峻形势出发，说明作为全国性的专用通信网进行优化改造的必要性和紧迫性，对优化改造的方案进行了具体的论述。
From the grim situation faced by the railway communication network, this paper shows the necessity and urgency of optimizing and rebuilding as a national special communication network, and elaborates on the optimization and reformation plan.