Part one of term paper
are used to connect two computers over a phone line. Modem is short for Modulator Demodulator. It's a device that converts data from digital computer signals to analog signals that can be sent over a phone line. This is called modulation. The analog signals are then converted back into digital data by the receiving modem. This is called demo ...

Part two of term paper
... time, modems send tones to each other to negotiate the fastest mutually supported modulation method that will work over whatever quality line has been established for that call. There are two main differences in the types of modems for PC, internal and external modems. Evolution of Modems In the last 10 years, modem users have gone from data transfer rates of 300bps to 1,200 bps to 2,400 bps to 9,600 bps to 14.4Kbps to 28.8Kbps to, and to 33.6Kbps. Now new modem standards are emerging, ...