In the past adopting wired or radio station to organize network had the shortcomings of high cost incomprehensive coverage and low reliability .

以往采用 有线或 无线电台通信 方式组网，常常存在费用高、覆盖范围小和可靠性低的问题。

Then the analysis of mine wired intercom system in which the coal mine cable radio station design ideas are discussed focusing on the underground cable radio station hardware design expounds the underground cable radio station key technology and working principle .

然后分析煤矿 有线对讲系统组成，其中对煤矿井下有线 广播话站的设计思路进行了深入探讨，重点讨论井下有线广播主站的硬件设计，详细阐述了井下有线广播主站的关键技术及其工作原理。

WLAN is the expansion of existing wired local area network . It uses radio wave to bear the data .

无线局域网WLAN是现有的 有线局域网的扩展，它使用 无线电波来承载数据。

Research on Simultaneous Transmission for Both Wired and Wireless Signals in Radio Over Fiber System

Radio-over-Fiber系统中 有线和无线信号混合传输相关技术研究