Oyu Tolgoi (OT) is a copper-gold mine in the south of Mongolia’s South Gobi Province, 500 kilometers south of Ulaanbaatar, the capital of Mongolia. OT mine is a world-class mining project. As one of the world’s largest undeveloped high-grade copper mines, its initial proven reserves have more than 30 million tons of copper, 1,328 tons of gold and 7,600 tons of silver, in addition to molybdenum ore and other rare mineral resources. Construction on OT began in 2010 and the mine delivered the first batch of 5,800 tons of copper concentrate on July 9, 2013. In 2007, OT signed an agreement with Motorola to use Motorola's Dimetra IP digital trunking system. A total of three MTS4 ground stations were built, covering the main park, the north and the south of OT respectively. Later, an outdo

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