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Limits RegistryAT&T released the Bell 101 Data Set in 1958 for the SAGE air-defense network and made it commercially available in 1959. It sent digital data over ordinary telephone lines at 110 bit/s using frequency-shift keying; its successor, the 300 bit/s Bell 103 of 1962, set the pattern for dial-up modems for decades.
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AT&T released the Bell 101 Data Set in 1958 for the SAGE air-defense network and made it commercially available in 1959. It sent digital data over ordinary telephone lines at 110 bit/s using frequency-shift keying; its successor, the 300 bit/s Bell 103 of 1962, set the pattern for dial-up modems for decades.
The year AT&T released the Bell 101 dataset, the first commercial modem for transmitting computer data over telephone lines.
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Permanent ID limitsregistry.com/limits/LR-BELL-101-FIRST-COMMERCIAL-MODEM
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Limits Registry. LR-BELL-101-FIRST-COMMERCIAL-MODEM. First commercial modem for computers (Bell 101). 2026.