Dual tone multi-frequency (DTMF) is the sounds or tones generated by a telephone when the numbers are pressed. These tones are transmitted with the voice channel. DTMF is used to control automated equipment and signal user intent, such as the number they wish to dial.

Dual-tone multi-frequency signaling (DTMF) is a telecommunication signaling system using the voice-frequency band over telephone lines between telephone equipment and other communications devices and switching centers. [1]

DTMF is used in ham radio in applications such as IRLP and Echolink, as a means to dial outside numbers via phone patch and as a means for repeater owners to configure the system remotely. It is sometimes known as tone dialing and allows the user to send a series of tones that activate or disable a remote repeater or service.

DTMF Meaning: What Is DTMF and How Does It Work? In the 1950s, the Bell System, led by AT&T, began research into different transmission methods for dialing phone numbers and connecting phone calls. A method they developed, called MF (multi-frequency) signaling, was so successful in connecting distant telephone exchanges for long-distance calls ...

2022年11月18日 · Dual-tone multi-frequency (DTMF) produces touch tone sounds heard when pressing a number on a phone’s keypad. When you press a number key, DTMF sends the following: command to the switch. And it does this by sending two tones – a high- and low-frequency tone – for every number key pressed.

2023年9月18日 · DTMF, also known as dual-tone multi-frequency, is a telephony signaling technology that enables communication by sending signals in the form of audio tones. These audio tones are generated using a DTMF encoder, which converts the input from the user into a specific combination of frequencies.

2024年10月7日 · DTMF is a signaling technique in telecommunication systems that generates distinct audio tones for each number when a telephone keypad button is pressed. DTMF tones …

DTMF, or Dual-Tone Multi-Frequency tones, are in-band telecommunications signals sent over voice frequencies. Commonly used over telephone lines, DTMF tones are also commonly called Touch Tones.

What is Dual Tone Multi-Frequency? The DTMF (dual tone multi-frequency) is one kind of signaling system intended for identifying a push button on a DTMF keypad. A key can be formed by combining two sine wave tones.

2024年7月10日 · Dual tone multi-frequency (DTMF) uses audio frequencies to direct users to their desired phone connections. It works by transmitting those frequencies over the voice channel, which are then picked up by remote equipment (in-band …