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] The different beeps heard when pressing the number buttons on a telephone are the DTMF frequencies. On modern telephones ...

This tool alows you to encode or decode DTMF (dual-tone multi-frequency) signals. Use this slider to set the duration of the tones. Use this dialpad to create the corresponding DTMF tones. You can capture the sound of your microphone. You should use a different device to generate the tones. Letter: ?? Number: A tool by Nicolas Hollmann.

2020年6月28日 · DTMF(Dual Tone Multi Frequency) 双音多频，由高频群和低频群组成，高低频群各包含4个频率；两个频率波形合成按键信号(0-9 * # A B C D)。 SIP中检测DTMF信号的方法：SIPINFO、RFC2833、INBAND；至于这些是什么我这个外行纯属热闹；拿两个

A DTMF code for dual-tone multi-frequency, is the name given to a combination of sound frequencies (beep) emitted by the keys of a telephone keypad. The sounds emitted can be used by telephone servers, either to recognize a dialed number, or by automated voice servers to recognize which keys are typed by the user.

Dual-tone multi-frequency signaling (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 was first developed in the Bell System in the United States, and became known under the trademark Touch-Tone for use in push-button telephones supplied to ...

2022年1月6日 · DTMF Code, short for dual-tone multi-frequency code, is a response code generated when an end-user presses the numbers on a mobile or landline phone’s keypad. Each number from 0 to 9 is uniquely identified with a DTMF code that can be received and interpreted on the receiver side.

DTMF is the basis for voice communications control. Modern telephony uses DTMF to dial numbers, configure telephone exchanges (switchboards), and so on. Occasionally, simple floating codes are transmitted using DTMF - usually via a CB transceiver (27 MHz). It is used to transfer information between radio transceivers, in voice mail

DTMF Decoder is a very easy to use program to decode DTMF dial tones found on telephone lines with touch tone phones. DTMF Decoder is also used for receiving data transmissions over the air in amateur radio frequency bands.

2015年11月18日 · 本文介绍了DTMF（Dual-Tone Multi-Frequency）编码及其在电话按键中的应用。 DTMF由低频和高频SINE波形相加组成，通过建立按键矩阵进行编码。 解码过程利用Goertzel算法高效找出匹配的频率组合。 文章通过示例展示了编码和解码的验证，强调了波形时间和编码的对应关系。 首先先说明一下 DTMF 的定义：Dual-Tone Multi-Frequency, 常见的应用就是电话按键的编码及解码. 如电话按键 4 * 4 的矩阵对应表. 由一组低频与一组高频的 SINE 波形相加组成. …

A web based DTMF encoder/decoder. Contribute to NHollmann/DTMF-Tool development by creating an account on GitHub.