How modems work .A sending modem translates digital signals into analog wavers for transmission over phone lines . A receiving modem translates the analog signals back into digital signals.

• 调制解调器是如何工作的。发送端的调制解调器将数字信号转换成模拟信号为了能够在电话线中传输。接收端的调制解调器把模拟信号转换成数字信号。