Wiktionary
tone dialing
n. a system of telephone dialing in which each digit is transmitted as a burst of a single audio frequency
Wikipedia
Tone Dialing (album)
Tone Dialing is an album recorded in 1995 by the American jazz composer and saxophonist Ornette Coleman and his Prime Time ensemble. It was released in September 1995 by Coleman's Harmolodic record label, in partnership with Verve/ PolyGram. It was the Harmolodic label's first release, and "the first disc fully devoted to Coleman's music in eight years."
Usage examples of "tone dialing".
In the bottom of its white plastic liner was a pile of dull blue dust, all that was left of a powder blue Princess phone with touch-tone dialing.