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 ...

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.

5 天之前 · VoIP & Issues with DTMF. DTMF (Dual Tone Multi-frequency) are signals/tones that are sent when you press a telephone's touch keys. These tones (or data signals) are used to access voicemail (passwords) and navigate IVRs or attendants for large companies like banks.

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]

2023年6月12日 · In Session Initiation Protocol (SIP), Dual-Tone Multi-Frequency (DTMF) tones are used for dialing, navigating automated phone systems, and other tasks. For instance, when you call a bank number and press a digit to select an option, the pressed digit is …

2015年8月11日 · 双音多频(DTMF)是由贝尔实验室开发的信令方式，通过承载语音的模拟电话线传送电话拨号信息。每个数字利用两个不同频率突发模式的正弦波编码，选择双音方式是由于它能够可靠地将拨号信息从语音中区分出来。一般情况下，声音信号很难造成对DTMF接收器的 ...

2023年7月7日 · DTMF phones provide safe and easy access to banking and financial services. Customers may use the keypad to execute transactions, check balances, and verify themselves, guaranteeing speedy and user-friendly interactions. Industrial automation and control systems depend heavily on a DTMF phone, which facilitates remote equipment monitoring.

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, which stands for Dual-tone Multi-Frequency, is a technology used in telephony for transmitting and decoding digits using a keypad or touchtone buttons on a phone. DTMF technology has several advantages that make it a …

2025年3月9日 · DTMF is the global standard for audible tones that represent the digits on a phone keypad. With touch-tone land-line phones, pressing a key on the dialpad generates the corresponding DTMF...