随着计算机通讯和国际互连网的不断发展,计算机之间的远程通讯技术越来越受到人们的重视。其中既简便又经济的方法就是利用现有的公用电话网将它们联系起来。但是通常计算机内部的数据传输是采用并行数字信号,而现有的电话网却仍然在使用模拟信号。所以当要把两者结合起来的时候,中间一定需要一种转换装置,它就是Modem。 With the continuous development of computer communication and the Internet, more and more attention has been paid to the remote communication technology among computers. One of the easiest and most economical ways to do this is to connect them using the existing public switched telephone network. However, the data transmission inside the computer usually uses parallel digital signals, while the existing telephone network still uses analog signals. So when it comes to combining the two, the middle must be a conversion device, it is Modem.