Difference between revisions of "DTMF"
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m (Six26 moved page DTMF to Phreaking/DTMF: sub page?) |
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| + | == Intro == | ||
| − | [[File:640px-66a3aDTMFpad.jpg|right]] | + | [[File:640px-66a3aDTMFpad.jpg|320px|right]] |
| + | {| class="wikitable" | ||
| + | |+ DTMF keypad frequencies (with sound clips) | ||
| + | |- | ||
| + | !align=center| | ||
| + | !align=center| 1209 Hz | ||
| + | !align=center| 1336 Hz | ||
| + | !align=center| 1477 Hz | ||
| + | !align=center| 1633 Hz | ||
| + | |- | ||
| + | !align=center| 697 Hz | ||
| + | |align=center| 1 | ||
| + | |align=center| 2 | ||
| + | |align=center| 3 | ||
| + | |align=center| A | ||
| + | |- | ||
| + | !align=center| 770 Hz | ||
| + | |align=center| 4 | ||
| + | |align=center| 5 | ||
| + | |align=center| 6 | ||
| + | |align=center| B | ||
| + | |- | ||
| + | !align=center| 852 Hz | ||
| + | |align=center| 7 | ||
| + | |align=center| 8 | ||
| + | |align=center| 9 | ||
| + | |align=center| C | ||
| + | |- | ||
| + | !align=center| 941 Hz | ||
| + | |align=center| * | ||
| + | |align=center| 0 | ||
| + | |align=center| # | ||
| + | |align=center| D | ||
| + | |} | ||
https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling | https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling | ||
| + | |||
| + | |||
| + | == Goertzel == | ||
https://en.wikipedia.org/wiki/Goertzel_algorithm | https://en.wikipedia.org/wiki/Goertzel_algorithm | ||
| + | |||
| + | |||
| + | == Stuffs == | ||
Revision as of 20:06, 19 September 2014
Intro
| 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