Transcription: A modem lets your PC talk to any other online computer in the world over ordinary telephone lines. How does the modem work? Well, a PC understands only digital data. In other words, code made up of only ones and zeros. But a telephone line uses an analog signal in which modulated wavelengths of sound transmit information, like your voice. That's why the modem exists. To translate the PC's digital data into an analog telephone signal. When you tell your modem software to dial up another computer, the modem opens the phone line, just like picking up the receiver. The modem then dials the number ...
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