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计算题：已知某小区360个call/小时，5次LU/call，1次SMS/call，TCH平均每呼叫使用时长为85秒，SDCCH平均每次使用时长为4.5秒。 ①请分别计算SDCCH话务量和TCH话务量。 ②已知该小区共2载频，non－combined，sdcch配置16个，请问该小区TCH是否有拥塞（呼损按2％计算），说明原因？

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