第三，如果想要与朋友打电话，则必须双方约定同时上网，并同时连接到同一网络电话服务器上。

Thirdly, if you want to talk with your friend, the two of you must appoint to get connected to the same IP server at the same time.

youdao

这个服务器类型为接口提供了现有电话环境。

This server type provides the interface with the existing telephony environment.

youdao

如果没有事先录制好演示内容，我就得带上几台交换服务器和电话交换机了。

Had I not prerecorded my demos, I would have had to bring along a few Exchange Servers and a telephone switch.

youdao