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:
“This city is neither a jungle nor the moon.... In long shot: a cosmic smudge, a conglomerate of bleeding energies. Close up, it is a fairly legible printed circuit, a transistorized labyrinth of beastly tracks, a data bank for asthmatic voice-prints.”
—Susan Sontag (b. 1933)
“No sociologist ... should think himself too good, even in his old age, to make tens of thousands of quite trivial computations in his head and perhaps for months at a time. One cannot with impunity try to transfer this task entirely to mechanical assistants if one wishes to figure something, even though the final result is often small indeed.”
—Max Weber (1864–1920)