mirror of
https://github.com/DarkFlippers/unleashed-firmware
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18 lines
654 B
Markdown
18 lines
654 B
Markdown
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[Original Link](https://github.com/litui/dtmf_dolphin)
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## DTMF Dolphin
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DTMF (Dual-Tone Multi-Frequency) dialer, Bluebox, and Redbox.
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Now in a release-ready state for both Dialer, Bluebox, and Redbox (US/UK) functionality!
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Please note that using the current tone output method, the 2600 tone is scaled about 33 Hz higher than it should be. This is a limitation of the current sample rate.
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### Educational Links:
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* http://www.phrack.org/issues/25/7.html#article
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* https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling
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* https://en.wikipedia.org/wiki/Blue_box
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* https://en.wikipedia.org/wiki/Red_box_(phreaking)
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