DTMF Tones, or Dual-Tone Multi-Frequency tones, are the sounds produced when you press the keys on a telephone keypad. Each key generates a unique combination of two frequencies, which allows the telephone system to identify the specific key pressed. This technology is widely used in touch-tone phones and automated systems. When you dial a number or navigate through a menu, the DTMF Tones are sent to the phone network, enabling communication between the caller and the system. This method is efficient and reliable, making it a standard feature in modern telecommunication systems.