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2. Push-button telephone - Wikipedia

   en.wikipedia.org/wiki/Push-button_telephone

   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 ...

3. Telephone keypad - Wikipedia

   en.wikipedia.org/wiki/Telephone_keypad

   A telephone keypad using the ITU E.161 standard. 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 that replaced ...

4. DTMF - Wikipedia

   en.wikipedia.org/wiki/Dtmf

   Dual-tone multi-frequency signaling ( DTMF) is a telecommunication signaling system using the voice-frequency band over telephone lines between telephone equipment and other communications devices and switching centers. [1] DTMF was first developed in the Bell System in the United States, and became known under the trademark Touch-Tone for use ...

5. Timeline of the telephone - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_the_telephone

   1960s: Bell Labs developed the electronics for cellular phones; 1961: Initiation of Touch-Tone service trials; 1962: T-1 service in Skokie, Illinois; 18 November 1963: AT&T commences the first subscriber Touch-Tone service in the towns of Carnegie and Greensburg, Pennsylvania, using push-button telephones that replaced rotary dial instruments.

6. Touch-Tone Telephone - Wikipedia

   en.wikipedia.org/wiki/Touch-Tone_Telephone

   A music video for "Touch-Tone Telephone" directed by Chris Spargo was released on October 30, 2020. The video stars Tom Wohlfahrt, who dances and acts out the song's lyrics in a room with an evidence board, a push-button telephone, and a projector. After the creation of the video's concept, filming took four days and production took three weeks ...

7. Trimline telephone - Wikipedia

   en.wikipedia.org/wiki/Trimline_telephone

   A 220 Trimline rotary desk phone, showing the innovative rotary dial with moving fingerstop Early Touch Tone Trimline with round buttons and clear plastic backplate and round non-modular handset cord Redesigned touch-tone desk model Trimline, manufactured on January 9, 1985 The Trimline 2225, one of the last phones made at the Indianapolis Works in 1986 Early foreign made Trimline, December ...