给出一种基于脉冲编码调制原理实现高速数字传输系统中低速设备接入的方法。
On the basis of PCM Encoding Theorem, a method for low rate equipments' imported into high rate digital transmission systems is given.
随着脉冲编码调制技术的出现，把模拟信号转换为数字信号的原理得到广泛应用；
The principle of converting analog signals to digital signals bacame popular with the introduction of pulse code modulation ;
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