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Questions tagged [dtmf]

Related to transmitting or receiving Dual-Tone Multi-Frequency (DTMF) signaling, a technology used in analog telephony.

Related to transmitting or receiving Dual-Tone Multi-Frequency (DTMF) signaling, a technology used in analog telephony.

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How to send DTMF signal in Symbian S60

I am new to Symbian development. I am developing a VOIP [SIP protocol] app for Nokia Symbian S60 3rd edition. I want to send DTMF signal through my app. But couldn't find any clue. So how can I send and catch DTMF signals in my app. Thanks in…
shibli049
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DTMF Tones take a while to play

I am working on a phone app. I have a dial pad grid view with buttons. I have a tone generator object created in onResume method. I also use a lock object. On click of any digit, i use the tone generator object to play a DTMF tone corresponding to…
user959739
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live detect DTMF code from the mic using sox and multimon-ng

I want to detect the DTMF tones from the live audio stream. I am able to record the live audio and store it to a wave file using sox: sox -b 16 -e signed-integer -c 1 -d -t wavpcm tt.wav I am also able to detect the tone using…
Mohit
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Getting DTMF signals when receiving a call on Android

Is there any way to receive and identify DTMF signals when you get a phonecall? I found these two functions (extractNetworkPortion & extractPostDialPortion), but I can't seem to get DTMF signal send by phonecalls. Also, what is the shortest delay…
Andreas
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How to gather Twilio DTMF input from call recipient on outbound call

We're developing a Twilio programmable voice app that can select from a list of persons, and place an outbound call to their regular telephone number. Once the call is connected, we want to be able to speak to the party and then gather dtmf input…
Rob Carlisle
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Where are DTMF sound files on iOS 11?

I'm using iOS' DTMF audio files at /System/Library/Audio/UISounds/dtmf-0.caf etc.. These files can no longer be found there on iOS 11. Has anyone found them? Or, can you confirm Apple no longer has DTMF as files, but rather generates them?
meaning-matters
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iphone sdk How to play DTMF audio file during a phone communication

I need to create an application that interact with a telecom company. The end user make some choice in the application and after that we compose a number that include DTMF tone after a pause (,) to call the corresponding departement. But my problem…
Amnysia
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How to fetch DTMF Tones in Android application

Is it possible to fetch DTMF tones in android when the person on other side presses 1,2,3.....9 during a conversation? If so, how?
nirav
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CXPlayDTMFCallAction doesn't play local dtmf sound

I am integrating CallKit with VOIP app. I was able to make incoming and outgoing calls. I followed the step: ConfigureAudioSession startAudio in (didActivate) stopAudio in (didDeActivate) I have implemented the callbacks for DTMF provider delegate…
ssk
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android, how to programatically capture which On screen keypad key is pressed during call?

How to capture the key presses during a call. They way user navigates IVRs when they call an operator they press 1 or some other key to select language and so on. Is there a way to programtically capture these key presses?
Vivid ADev
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Android: DTMF Conference call

I am working a conference app, in this application I need to call a conference number via Intent Action. The phone number is as "Phone No,Conference Pin#". The main problem I am facing is after call get connected, to join conference it take 20 sec.…
Sandip Jadhav
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How to Programatically Dial a Phone number in the Android SDK?

How do you programatically do this in the Android SDK: Dial a phone number Bypass the keypad screen Send additional DTMF after the number is dialed Bypass the send DTMF tone prompt I have managed to do 1 till 3 by dialing +555-1212w1234…
Jason Yeo
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Parse (extract) DTMF in Python

If I have a recorded audio file (MP3), is there any way to get the figure out the DTMF tones that were recorded in pure Python? (If pure python is not available, then Java is okay too. The point being that it should be able to run in Google…
yydl
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Call a Phone number and pass DTMF using iOS

How to achieve the below requirement using iOS? 1) Programmatically dial a Phone Number through iOS. 2) Send additional DTMF after the number is called. I found tel URL scheme is available to make a call. Not sure about sending DTMF…
datag
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Is it kosher to send RTP audio and DTMF events at the same time?

I am sending an audio stream over RTP, and at the same time ought to send some DTMF events to control a switch on the other end. First of all, from the RTP standard, is it allowed to send continuous uninterrupted audio and events overlapping in…
kkm inactive - support strike
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