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Online DTMF Tone Generator - Audio Check
https://www.audiocheck.net/audiocheck_dtmf.php
Dual-Tone Multi-Frequency (DTMF) is the signal that you generate when you press an ordinary telephone's touch keys. Over the years, DTMF has replaced Pulse dialing, the early type of telephone dialing in which short pulses were used to relay the dialed number. With DTMF, each keypress on your phone generates tones made of two specific frequencies.
DTMF (dual tone multi-frequency) - SearchNetworking
https://www.techtarget.com/searchnetworking/definition/DTMF
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.
DTMF Audio Adjustments for Transmitters - Genave
http://genave.com/dtmf-audio-adjustments/
DTMF Audio Adjustments for Transmitters DTMF signals can be sent over copper wire, FM radio, microwave systems and any other medium which can handle normal audio. DTMF is very forgiving and adaptable, but there are a few guidelines which should be observed when sending the signals. DTMF has great hearing.
DTMF issues and problems when using VoIP.
https://www.voipmechanic.com/dtmf-issues.htm
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.
DTMF Tone Decoder - PAS-Products
https://pas-products.com/dtmf_tone_decoder.html
DTMF Tone Decoder software is an essential tool for audio technicians, police officers, forensic technicians, countermeasures technicians, and other audio related fields. The program provides the user a audio spectrum analyzer that is powerful and simple to use without complicated menus and setup requirements.
Download DTMF Tone Decoder 2019 - softpedia
https://www.softpedia.com/get/Multimedia/Audio/Audio-Mixers-Synthesizers/Spectrum-Analyzer-DTMF-Tone.shtml
DTMF Tone Decoder is a professional software application designed to help audio technicians analyze WAV files. It comes with support for spectrum analyzer, WAV recorder/player with built-in …
Using DTMF with WebRTC - Web APIs | MDN
https://developer.mozilla.org/en-US/docs/Web/API/WebRTC_API/Using_DTMF
The DTMF system is often referred to as "touch tone," after an old trade name for the system. WebRTC doesn't send DTMF codes as audio data. Instead, they're sent out-of-band, as RTP payloads. Note, however, that although it's possible to send DTMF using WebRTC, there is currently no way to detect or receive incoming DTMF.
4 Channel DTMF controller info | radionut63
https://radionut53.wixsite.com/radionut63/4-channel-dtmf-controller-info
This is the DTMF audio controller with four channels, any phone or fixed telephone with DTMF key code remotely controls product relay 'open' and 'close'. (the majority of smartphones and functions machine are DTMF code). Our software 'DTMF Dial' (installed in a computer) can be also provided to control relays. You can swap phone's for radio's
Online Tone Generator - A free and simple way to generate ...
https://onlinetonegenerator.com/dtmf.html
DTMF Dial Tones The Online Tone Generator can be used to create Dual Tone Multi Frequency (DTMF) signals commonly heard on telephone dial pads. Each tone is simply the sum of two sine waves. Click and hold the dial pad buttons to hear each tone.
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