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"modem" is a combination of modulator and demodulator

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The word modem is a combination of two words; modulator and demodulator.

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psk transmitted information at a rate of 1200bits/sec vs fsk's 750bits/sec.

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how big was the 80-103a?

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Do modems use biary code?

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How heavy are most modems?

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The new technology was first used by the North American Air Defense System in 1950s.

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The first computer modem was created in 1977 by Dale Heatherington and Dennis Hayes

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The first modems were called frequency-shift keying.

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The demodulate filters out telephone signals and converts analog data into digital data

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The Hayes 80-103A was the first computer based on modem

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Early modems were used with telephones and fax machines not computers.

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Modems connected your computer to the internet through telephone lines

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Early modems were used with telephones and fax machines

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The word modem is a combination of the words modulator and demodulator.