Qinghai-Tibet Railway is the first high -altitude railway using GSM-R digital communication in China. All line adopts Ticom GSM-R GSM-R fiber optic repeater, which is used in Wind volcano tunnel(The highest plateau permafrost tunnel in the world ), Kunlun Mountains tunnel( the longest plateau permafrost tunnel in the world), and other tunnels. Qinghai-Tibet Railway was put into use in July 2006.
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