对开关信号进行直接编码，采用3个连续出现的大码距字节表示开关信号的一个状态，编码后的信号利用电信网的数字中继线路传输。
The switch signal was encoded directly and one state was expressed with 3 long distance sequence code, then it was transmitted through the digital relay line of telecommunication network.
除了间隔上的隔离，“持续音频编码静噪系统”(CTCSS，普通昵称“专用线路”)能够缓解中继器的干预问题。
In addition to geographical separation, the "continuous tone-coded squelch system" (CTCSS), sometimes nicknamed "private line" (PL), technology can be used to mitigate interference problems.
对电路实验中继电接触器控制线路进行了研究分析，并提出由逻辑函数实现其控制的方法。
The article analyses control circuit of relay contactor in electric circuit experiment and puts forward to control it with logic function.
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