Binary Data Transfer
It's also possible to transfer Binary code (including ASCII text messages) using DTMF by treating received code as hexadecimal interpretation of nibble, assuming that E is equal to * and F is equal to #. This means that two subsequent DTMF tones are enough to transfer whole byte of data or 8-bit ASCII character.
Read more about this topic: Dual-tone Multi-frequency Signaling
Famous quotes containing the words data and/or transfer:
“To write it, it took three months; to conceive it three minutes; to collect the data in it—all my life.”
—F. Scott Fitzgerald (1896–1940)
“I have proceeded ... to prevent the lapse from ... the point of blending between wakefulness and sleep.... Not ... that I can render the point more than a point—but that I can startle myself ... into wakefulness—and thus transfer the point ... into the realm of Memory—convey its impressions,... to a situation where ... I can survey them with the eye of analysis.”
—Edgar Allan Poe (1809–1849)