The number of telephone lines connecting the subscriber's terminal equipment to the public switched network and which have a dedicated port in the telephone exchange equipment.

连接用户终端设备和公用交换网并具有一个电话交换设备专用端口的电话线数。

youdao

The call forwarding sample demonstrates the call forwarding feature typically seen in public switched telephone networks, but it USES a SIP network.

Call Forwarding示例显示了访问转寄的特性，该特性一般见于公共交换电话网络，但是它使用了一个SIP网络。

youdao

As voice communications is the primary media of communication for human being, it plays a very important role from public switched telephone network to the third generation mobile communications.

话音是人与人之间交流的主要方式，从最早出现公共交换电话网络到现在的第三代移动通信，语音通信是其最基本的功能。

youdao

When I travel I studiously avoid making and receiving voice calls over the public switched network because of the costs.

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Doesn't matter what kind of device the message is going to (wireline phones, mobile phones, PDAs or computers) or whether the message has to travel over the Internet or the public switched telephone network, for example.

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