DTMF Encoder Decoder is very easy to use the program to decode DTMF dial tones found on telephone lines with touch-tone phones. • DTMF is the global standard for audible tones that represent the ...

It relies on the fact that almost every ham radio designed for field use incorporates a DTMF encoder in the microphone or in the transceiver itself. Hams have used Touch Tones for in-band ...

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 ...