Dual tone multifrequency. Use of two simultaneous voice-band tones for dialing (such as touch tone).

Short for Dual Tone Multi-Frequency, the system used by touch-tone telephones. DTMF assigns a specific frequency (consisting of two separate tones) to each key so that it can easily be identified by a [..]

See Dual Tone Multi-Frequency

(Touch Tone) A type of dialing in which, when you touch a push button, it makes a tone which is actually the combination of two tones, one high frequency and one low frequency. In [..]

(Dual Tone Multi-Frequency)

Dual Tone Multi Frequency. The signal to the phone company that you generate when you press an ordinary telephone's touch keys.

DTMF (dual tone multi frequency) is the signal or noise the phone keypad makes when you press the touch keys. When you press a key it generates two specific frequencies so a voice cannot imitate the tones. These tones are used for signalling the telephone exchange.

Dual Tone Multiple Frequency (DTMF) is a signaling method developed by Bell Labs for sending telephone dialing information over the same analog, voice-quality phones lines that carry voice. Each digit is encoded as the sum of two sine wave bursts, of different frequencies. The two-tone method was chosen because it can be reliably distinguished from [..]

(Dual Tone Multi-Frequency) DTMF is the global standard for audible tones that represent the digits on a phone keypad. With touch-tone land-line phones, pressing a key on the dialpad generates the cor [..]

Abbreviation for dual-tone multifrequency (signaling).

  Dual Tone Multy-Frequency In-band tone system used for telecommunication signalling over analog telephone lines. The system uses 8 different tones, two of which are sent simultaneously. It is mainly [..]

Dial Tone Multifrequency. The tones generated by punching in numbers on a telephone key-pad.

Dual Tone Multi-Frequency (also known as Touch Tones) - two tones of a set of 8 tones are generated by a DTMF keypad. Each row (1, 4, 7, star) activates one tone, each column (1, 2, 3, A) activates a second tone. The standard telephone keypad omits column A (A, B, C, D). DTMF tones can be carried by voice links, and they are generated by most telep [..]

dual-tone multi-frequency