Online Tone Generator 2.0
DTMF Dial Tones
The Online Tone Generator can be used to create Dual Tone Multi Frequency (DTMF) signals commonly heard on telephone dial pads. Each tone is simply the sum of two sine waves. Click and hold the dial pad buttons to hear each tone.
| 1209Hz | 1336Hz | 1477Hz | 1633Hz | |
| 697Hz | ||||
| 770Hz | ||||
| 852Hz | ||||
| 941Hz |
| Dial Tone 350Hz and 450Hz |
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| Ringing Tone 400Hz and 450Hz (On for 400ms, off for 200ms, on for 400ms, off for 2000ms) |
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| Busy Tone 400Hz (On for 350ms, off for 350ms) |
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| Number Not Recognised Tone 950Hz then 1400Hz then 1800Hz (Each last 330ms with a 15ms pause between each tone) |