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A push-button telephone is a telephone that has buttons or keys for dialing a telephone number, in contrast to a rotary dial used in earlier telephones.. Western Electric experimented as early as 1941 with methods of using mechanically activated reeds to produce two tones for each of the ten digits and by the late 1940s such technology was field-tested in a No. 5 Crossbar switching system in ...
A telephone keypad is a keypad installed on a push-button telephone or similar telecommunication device for dialing a telephone number. It was standardized when the dual-tone multi-frequency signaling (DTMF) system was developed in the Bell System in the United States in the 1960s – this replaced rotary dialing , that had been developed for ...
The Western Electric model 1500 telephone adapted the 500 design for touch-tone dialing with a push-button pad for the digits 0 through 9. It was produced from 1963 to 1968. In addition to the basic single-line model 1500D, the 1500-series included many related variations and special purpose models with additional features.
The Nokia C3-00 is a QWERTY keypad feature phone with the Nokia Series 40 mobile operating system, released under the Cseries line of phones by Nokia. It features a full 4-line keyboard, like the earlier Nokia 6800 series. It was advertised as an entry-level messaging and social networking phone, retailing at 90 EUR
A telephone keypad using the ITU E.161 standard. Numeric keypad, integrated with a computer keyboard A calculator 1984 flier for projected capacitance keypad. A keypad is a block or pad of buttons set with an arrangement of digits, symbols, or alphabetical letters.
The rotary dial version with ringer was known as the 702B, while the modular cord variant was labeled 702BM. The model 711B had a slide switch or push-button and was a two-line phone with exclusion on the first line. The ten-button Touch Tone version was known as the 1702B, and when twelve-button keypad were introduced the phone was labeled as ...
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