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Modem
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A modulator-demodulator, commonly referred to as a modem, is a computer hardware device that converts data from a digital format into a format suitable for an analog transmission medium such as teleph
Acoustic coupler modems used a telephone handset as the audio medium, with the user dialing the desired number and then pressing the handset into the modem to complete the connection. These systems generally operated at a speed of 300 bits per second.
Acoustic coupler modems used a telephone handset as the audio medium, with the user dialing the desired number and then pressing the handset into the
Collection of modems once used in Australia, including dial-up, DSL, and cable modems
Collection of modems once used in Australia, including dial-up, DSL, and cable modems
A demonstration of AT&T Bell 101 modem in 1958
A demonstration of AT&T Bell 101 modem in 1958
The original 300-baud Hayes Smartmodem
The original 300-baud Hayes Smartmodem
Bell 101
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The Bell 101 Data Set was the first commercial modem for computers, released by AT&T Corporation in September 25, 1958 for use by SAGE, and made commercially available in 1959, shortly after AT&T's Be
Modem
…scattered around the United States and Canada. Shortly afterwards in 1959, the technology in the SAGE modems was made available commercially as the Bell 101, which provided 110 bit/s speeds. Bell called this and several other early modems "datasets". Some early modems were based on touch-tone frequencies…
The back of a Teletype Model 33 teleprinter with a Bell 101C Data Set in the pedestal, 1963.
The back of a Teletype Model 33 teleprinter with a Bell 101C Data Set in the pedestal, 1963.