dual-tone multifrequency (DTMF) signaling

   Sometimes called touch tone, a signaling method that uses specific pairs of frequencies within the voiceband for signals. One tone in each pair is chosen from a group of four low frequencies, and the other tone is selected from a group of four higher frequencies. The eight frequencies are 697, 770, 852, 941, 1209, 1336, 1477, and 1633 Hz.

IT glossary of terms, acronyms and abbreviations. . 2015.

Look at other dictionaries:

  • 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 — (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

  • DTMF —    See dial, dual tone multifrequency, dual tone multifrequency signaling …   IT glossary of terms, acronyms and abbreviations

  • telephone — telephoner, n. /tel euh fohn /, n., v., telephoned, telephoning. n. 1. an apparatus, system, or process for transmission of sound or speech to a distant point, esp. by an electric device. v.t. 2. to speak to or summon (a person) by telephone. 3.… …   Universalium

  • Disconnect supervision — is a term in telephony describing signaling between the telephone exchange and a connected party used to indicate that the connected call is being disconnected. For example the called party may indicate to the telephone exchange that the call is… …   Wikipedia

  • Answer supervision — is a term in telephony, describing a situation whereby the called party indicates to the central office that the call is being answered by the called party. by allowing loop current to flow in the line.OverviewCAS E M Signaling BasicsFor digital… …   Wikipedia

  • MF —    See medium frequency, multifrequency. See also dual tone multifrequency signaling (DTMF) …   IT glossary of terms, acronyms and abbreviations

  • Number One Crossbar Switching System — The Number One Crossbar Switching System, or 1XB switch, was the primary urban local telephone exchange design used by the Bell System in the mid 20th century. Its switch fabric topology was based on the earlier urban panel switch system, which,… …   Wikipedia

  • Аббревиатуры телефонии — Эта страница глоссарий. Аббревиатуры, используемые в телефонии и связи …   Википедия

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.