He asked to be connected to the central switchboard.

他要求转接到电话总机。

《柯林斯英汉双解大词典》

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.

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。

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