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 …

Jul 19, 2021 · 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 D ual T one Multi-Frequency. 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 …

Jul 11, 2025 · Dual-Tone Multi-Frequency (DTMF) signaling is a system by which audible tones are used to represent buttons being pressed on a keypad.

Jan 21, 2016 · DTMF signaling is used for voice-frequency signaling over radio channels or telephone lines. In radio signaling, this is commonly used for tone-squelch or fire tone-out type applications.

Jun 12, 2023 · Dual-Tone Multi-Frequency (DTMF) tones are used for dialing, navigating automated phone systems, and other tasks.

Learn about DTMF (Dual Tone Multi Frequency) signal frequencies and their corresponding codes used in telecommunication networks. Understand the row and column representation of tones.

Dec 29, 2025 · What Is DTMF (Dual-Tone Multi-Frequency)? DTMF is a signaling method used in telecommunication systems where each key press on a telephone keypad generates two …

DTMF replaced rotary dial telephones and has lasted to the present day. Learn more about this signaling technology and how it works.

Nov 25, 2021 · DTMF is a signaling mode used for a variety of purposes. It's most known for telephony dialing, but is in use for many different applications such as DTMF paging for DTMF-enabled …