Path: utzoo!utgpu!watmath!clyde!att!osu-cis!killer!vector!nobody
From: ron@ron.rutgers.edu (Ron Natalie)
Newsgroups: comp.dcom.telecom
Subject: Re: DTMF vs. Touch-Tone
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Date: 23 Dec 88 15:13:06 GMT
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> I'm curious when the term DTMF (Dual Tone Multi Frequency) became synonymous
> with Touch Tone.

It has been since day 1, most frequently used because TouchTone is a trademark.

> As I recall, DTMF once designated the set of dual-tone
> frequencies used for in-band signaling on long distance trunks, which used

Those are referred to as simply "MF" tones.