DTMF (dual tone multi frequency) is the signal to the phone company that you generate when you press an ordinary telephone’s touch keys.   Dual Tone Multi Frequency (DTMF), is a form of signalling used by phone systems to transmit the digits 0-9 and the * and # characters. Typically a caller presses these buttons on their telephone keypad and the phone then generates a tone made up of two frequencies played simultaneously (hence Dual Tone)or promotional purposes.   As a reliable and convenient voice broadcasting solution provider in India, we’re dedicated to meeting the customer’s requirement with real-time results. See the beauty of voice broadcasting.