dual tone multi frequency

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• Dual-tone multi-frequency — (DTMF) signaling is used for telephone signaling over the line in the voice frequency band to the call switching center. The version of DTMF used for telephone tone dialing is known by the trademarked term Touch Tone (canceled March 13, 1984),… …   Wikipedia

• Dual Tone Multi-Frequency — Codes DTMF Les codes DTMF (dual tone multi frequency) sont les combinaisons de fréquences utilisées pour la téléphonie moderne (en opposition aux téléphones dits à impulsions). Ces codes sont utilisés pour la composition des numéros de téléphones …   Wikipédia en Français

• Dual-tone multi-frequency signaling — One of the few production telephone DTMF keypads with all 16 keys, from an Autovon Telephone. The column of red keys produces the A, B, C, and D DTMF events. Dual tone multi frequency signaling (DTMF) is used for telecommunication signaling over… …   Wikipedia

• Dual Tone Multi Frequency — allocation of a unique tone to each button on an appliance (made up of two frequencies high and low) that allows a computer to recognize the tone (DTMF) …   English contemporary dictionary

• Multi-frequency signaling — In telephony, multi frequency signaling (MF) is an outdated, in band signaling technique. Numbers were represented in a two out of five code for transmission from a multi frequency sender, to be received by a multi frequency receiver in a distant …   Wikipedia

• Multi-frequency receiver — Multi Frequency signalling, (MF), is similar to the European version, CCITT Signaling System 5, (SS5). The original format was five tones used in pairs. This later evolved to six tones. Because its six tones are used only in pairs, this signaling …   Wikipedia

• Tone — may refer to: MusicTheory* Pitch (music), the perceived frequency of a note or sound (see also pure tone) * Note, the name of a pitch * Whole tone, or major second, a commonly occurring musical interval * Timbre, the quality of a musical note or… …   Wikipedia

• Multi-Use Radio Service — In the United States, the Multi Use Radio Service (MURS) is an unlicensed two way radio service similar to Citizens Band (CB). Established by the U.S. Federal Communications Commission in the fall of 2000, MURS created a radio service allowing… …   Wikipedia

• Frequency-shift keying — Passband modulation v · d · e Analog modulation AM · …   Wikipedia

• Continuous Tone-Coded Squelch System — In telecommunications, Continuous Tone Coded Squelch System or CTCSS is a circuit that is used to reduce the annoyance of listening to other users on a shared two way radio communications channel. It is sometimes called tone squelch. Where more… …   Wikipedia

• Dial tone — For the G.I. Joe character, see Dial Tone (G.I. Joe). A dial tone (known in the British Isles as a dialling tone)[1] is a telephony signal used to indicate that the telephone exchange is working, has recognized an off hook, and is ready to accept …   Wikipedia