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@@ -1,5 +1,7 @@
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## DTMF Dolphin
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DTMF (Dual-Tone Multi-Frequency) dialer, Bluebox, and future Redbox.
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@@ -7,3 +9,10 @@ DTMF (Dual-Tone Multi-Frequency) dialer, Bluebox, and future Redbox.
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Now in a release-ready state for both Dialer and Bluebox functionality. Redbox functionality awaits some changes for modulation.
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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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Aria Burrell