What does dual tone multi frequency mean?

Definitions for dual tone multi frequency
du·al tone mul·ti fre·quen·cy

This dictionary definitions page includes all the possible meanings, example usage and translations of the word dual tone multi frequency.

Wikipedia

  1. Dual tone multi frequency

    Dual-tone multi-frequency signaling (DTMF) is a telecommunication signaling system using the voice-frequency band over telephone lines between telephone equipment and other communications devices and switching centers. DTMF was first developed in the Bell System in the United States, and became known under the trademark Touch-Tone for use in push-button telephones supplied to telephone customers, starting in 1963. DTMF is standardized as ITU-T Recommendation Q.23. It is also known in the UK as MF4. The Touch-Tone system using a telephone keypad gradually replaced the use of rotary dial and has become the industry standard for landline and mobile service. Other multi-frequency systems are used for internal signaling within the telephone network.

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Numerology

  1. Chaldean Numerology

    The numerical value of dual tone multi frequency in Chaldean Numerology is: 8

  2. Pythagorean Numerology

    The numerical value of dual tone multi frequency in Pythagorean Numerology is: 2

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"dual tone multi frequency." Definitions.net. STANDS4 LLC, 2024. Web. 19 Mar. 2024. <https://www.definitions.net/definition/dual+tone+multi+frequency>.

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