将“PABX"翻译成中文

PABX, routing and connecting equipment were maintained by the Office and the Department to run crypto-fax traffic that requires special types of analogue lines.

专用小交换机、路由器和连接设备由信通厅和外勤部维持,用来传输需要特殊类型模拟线路的加密传真流量。