Difference between revisions of "DTMF"

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m (Six26 moved page DTMF to Phreaking/DTMF: sub page?)
(freq table)
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== Intro ==
  
[[File:640px-66a3aDTMFpad.jpg|right]]
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[[File:640px-66a3aDTMFpad.jpg|320px|right]]
  
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{| class="wikitable"
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|+ DTMF keypad frequencies (with sound clips)
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|-
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!align=center|
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!align=center| 1209 Hz
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!align=center| 1336 Hz
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!align=center| 1477 Hz
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!align=center| 1633 Hz
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|-
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!align=center| 697 Hz
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|align=center| 1
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|align=center| 2
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|align=center| 3
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|align=center| A
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|-
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!align=center| 770 Hz
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|align=center| 4
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|align=center| 5
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|align=center| 6
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|align=center| B
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|-
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!align=center| 852 Hz
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|align=center| 7
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|align=center| 8
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|align=center| 9
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|align=center| C
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|-
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!align=center| 941 Hz
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|align=center| *
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|align=center| 0
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|align=center| #
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|align=center| D
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|}
  
 
https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling
 
https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling
  
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== Goertzel ==
  
 
https://en.wikipedia.org/wiki/Goertzel_algorithm
 
https://en.wikipedia.org/wiki/Goertzel_algorithm
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== Stuffs ==

Revision as of 20:06, 19 September 2014

Intro

640px-66a3aDTMFpad.jpg
DTMF keypad frequencies (with sound clips)
1209 Hz 1336 Hz 1477 Hz 1633 Hz
697 Hz 1 2 3 A
770 Hz 4 5 6 B
852 Hz 7 8 9 C
941 Hz * 0 # D

https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling


Goertzel

https://en.wikipedia.org/wiki/Goertzel_algorithm


Stuffs