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. Each key has two tones at specific frequencies.

Dual-tone multi-frequency (DTMF) signaling 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 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 ...

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.

The two tone signaling system that we call Touchtone or DTMF was first announced by the Bells system in January 1960 in the Bell System technical Journal (BSTJ) as "Pushbutton Calling with a Two-Group Voice-Frequency Code".

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. These tones are the frequencies of rows as well as column which are represented on the keypad of …

2023年9月18日 · DTMF stands for Dual-Tone Multi-Frequency. It is a technology used in communication systems, specifically in telephony, to encode and decode the keypad tones or the touchtone sounds that are produced when pressing the buttons on a phone’s keypad.

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

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.

Dual-tone multi-frequency (DTMF) signaling uses audio tones over voice frequencies for telecom communication, primarily in call centers to route calls and process requests. It offers enhanced security, reduces errors, and improves call metrics.