Dualtone multifrequency dialing, also known as multi-frequency dialing (DTMF) or frequency dialing, is the dialing technique commonly used in analog telephone technology.
Telephone keystrokes are transmitted by different tones in the telephone system. The position of the keys determines the tone frequencies that are transmitted.
|1209 Hz||1336 Hz||1477 Hz||1633 Hz|
GC Wizard provides two functions:
Encoding – i.e. a key (digit or character) is converted into the corresponding frequency pair.
Decode – i.e. a frequency pair is converted into the corresponding key (digit or character).