Mobile Telephone Switching Office -- 移动电话交换局

The central switch that controls the entire operation of a cellular system. It is a sophisticated computer that monitors all cellular calls, tracks the location of all cellular-equipped vehicles traveling in the system, arranges handoffs, keeps track of billing information, etc.

它是蜂窝系统的关键。MTSO首先把频率分配到每个呼叫中，然后在相互联系的传送呼叫中进行频率的再分配，它们是本地区域和具有远程传输线的电话公司之间传递的付费信息。每个蜂窝状系统都有一个或多个MTSO和转换器。