它们的主要区别在于采用模拟语音传输和数字语音传输。
The main difference between these two types is the transmission method of voice : one is transmitted by analog signal and the other uses digital signal.
接收端的计算机的调制解调器将模拟语音信号解调还原为计算机能理解的数字形式。
The modem of the receiving computer demodulates the analog sound signal back into a digital form that the computer can understand.
电话机包括一个送话器和一个受话器，用来在模拟语音和模拟电信号之间进行变换。
The telephone contains a transmitter and receiver for converting back and forth between analog voice and analog (voice-frequency) electrical signals.
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