固定-移动电话系统可以让移动电话通话经由公司内部的中央电话交换机来连接，这样可以大大减少打电话的支出，尤其是国际电话。

Some FMC systems, for example, allow calls from mobile phones to be routed through a company's central switchboard. This makes outgoing calls, particularly international ones, much cheaper.

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本文对程控数字电话交换机所用的集成电路器件，交换机的系统结构以及性能要求的发展趋势进行了讨论。

The development trends of integrated circuits used in SPC telephone switching systems, system architecture, features and requirements of the switching systems are discussed.

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工作职责：管理维护公司的用户电脑以及服务器，门禁系统，电话交换机。

Responsibilities: management and take care of company computers and server, door keeping system and telephone switch.

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