[Rogal] wrote a cell phone application called ToneTool that generates audio tone sequences. It can be used to output DTMF and SelCall sequences which are used by telephone systems and radio ...

Whilst DTMF is still commonly used in telephony, blue boxing and red boxing were used in the 1970s - late 90s (?) for making fraudulent calls. To the best of my knowledge, neither has working in at ...

This is the alpha test release of gr-dtmfgen, a embedded python block for generating DTMF message. This block generates floats containing the frequencies of both DTMF tones. If this is fed to a ...

Using the app DTMF Tone Generator and outputting through the 3.5mm jack, commands are interpreted by a MT8870DE DTMF decoder module.While this control method carries some risks — as with many ...