无线电缆的价值体现在对头端和用户之间的广播内容进行的保护能力。
手机基站的无线电路通常在一个机柜里，由电缆连接到高架塔上的天线。
In a mobile base-station the radio circuitry usually sits in a cabinet and is connected by a cable to an antenna on the tower overhead.
一定频谱范围内的无线电波只能搭载有限的广播频道；同轴电缆只能传 输有限的电视频道。
The radio spectrum can carry only so many stations, and a coaxial cable so many TV channels.
我们不会讨论电缆，电话或蜂窝式电话或者无线电话，因为在任何信息提供和发送信息者之间的竞争是自由的，公开的。
We will not talk about cable, or telephones, or cellular, or wireless, because there will be free and open competition between everyone who provides and delivers information.
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