DTMF
Adjective
Meaning
DTMF (not comparable)
(communication) Abbreviation of dual-tone multi-frequency.
Examples
A few examples: * DTMF is an in-band, channel-associated register signaling system.
DTMF tones are used in some caller ID systems to transfer the caller ID information, but in the United States only Bell 202 modulated FSK signaling is used to transfer the data.
Commonly used are DTMF broadcasts over phone lines (direct connection or standard PSTN ) or over radio broadcast.
DTMF was known throughout the Bell System by the trademark Touch-Tone.
An example is dual-tone multi-frequency signaling (DTMF), which is used on most telephone lines to customer premises.
DTMF decoding algorithms often use the Goertzel algorithm to detect tones.