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mitun Group Title

How frequency is converted to numeric number,for example i clicked on '1' of my keypad and it is shown in screen of my mobile or computer? I seem, this happens not only for number but also for others keys of keyboard.What is the fact behind it?

  • 2 months ago
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  1. Johnbc Group Title
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    Programs and circuits.

    • 2 months ago
  2. Orion1213 Group Title
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    You might be referring to Dual-tone Multifrequency signalling used in telephony... hope this helps... :) http://www.engineersgarage.com/tutorials/dtmf-dual-tone-multiple-frequency

    • 2 months ago
  3. mitun Group Title
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    thanks for your help @Orion and @Johnbc is DTMF is used in modern technology like android,iphone and others ?

    • 2 months ago
  4. Orion1213 Group Title
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    yes it is... apps in android, iphone and others depending on your skills in programming can do it....

    • 2 months ago
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