Using dual-tone multi-frequency (DTMF) technology provided “touch-tone” service that would become the worldwide standard for telecommunication signaling. The system uses audible tones for each of the ...
The Princess Trimline phone was introduced in 1965. Photo courtesy of Distejon There was a time when telephone privacy was a concern held mostly by teenage girls. But, in 1965 Bell System answered the ...
Southwestern Pennsylvania made telephonic history in November 1963. Carnegie and Greensburg were first cities in the nation to get Bell Telephone’s touch-tone phones, which would eventually eclipse ...
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