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Bell 103
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The Bell 103 modem or Bell 103 dataset was the second commercial modem for computers, released by AT&T Corporation in 1963. It allowed digital data to be transmitted over regular unconditioned telepho
The Bell DataPhone 300 used the same protocol as the Bell 103. This modem is from 1978.
The Bell DataPhone 300 used the same protocol as the Bell 103. This modem is from 1978.
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
Bell 103
…digital data to be transmitted over regular unconditioned telephone lines at a speed of 300 bits per second. It followed the introduction of the 110 baud Bell 101 dataset in 1958. The Bell 103 modem used audio frequency-shift keying to encode data. Different pairs of audio frequencies were used by each station…
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.