dtmf

Is there DTMF API or standard that includes letters as well as standard numeric values?

I have not been able to find any literature on the subject. ...

Phone App Only Dials 7 digit phone numbers, Email function not working

I have developed an iPhone application that integrates a list of shopping registries,a To Do list and a Contact sub-app. The 'Contact' app has a GUI similar to the Info page on the iPhone's Contact app with ability to select a contact in the middle, and three buttons; Call, Sms, and Email at the bottom. When the user touches the 'Select...

Generate DTMF Tones

I am wondering if anyone has come across a way to generate tones in the iPhone SDK. I am trying to generate DTMF tones, and can't seem to find anything substantial out there. I want to be able to specify how long to play the tone for as well (i.e. to simulate holding the button down as opposed to just pressing it briefly.. I found an op...

How to send dtmf tones using BlackBerry API?

hi I have tried to use PhoneArguments phoneArgs = new PhoneArguments(PhoneArguments.ARG_CALL, num); Invoke.invokeApplication(Invoke.APP_TYPE_PHONE, phoneArgs); PhoneCall call = Phone.getActiveCall(); call.sendDTMFTones(tones); but it doesnt work. Can anyone point me to a working code snippet for sending DTMF? regar...

Uplink DTMF tone generation

Greetings Is there any way I can dynamically generate uplink DTMF tone (ie the receiver hears it)? When I looked at the android source code I saw a function called startDTMF() which is exactly what I need, but I couldn't find any API that allows me to access that function... I then thought of using ToneGenerator and tried to inject th...

Writing a grammar in VoiceXML to match # terminated digits or *1 or *2

I an writing a VoiceXML app and i am having a problem. The application listens for DTMF tones only. The user enters a confirmation number followed by #. They can also enter *1 or *2 to speak to customer service, or resend the confirmation message. I am having trouble creating a grammer that will work for this. I've been able to use t...

Change Call Screen

I need to change or customize the call screen when initiating a call on Android. After searching on google I do not find any way to do it. There is no way to send DTMF tones during a call, the idea is to send a specific number to the call screen. So when a call is made is possible to see the number to dial during a call to the PBX. I ...

"RFC 2833 RTP Event" Consecutive Events and the E "End" Bit

Why do I get a dtmf sound when the E bit is 0 and no sound when it is 1? (RTP packets appear in wireshark either way) Background: I can send out a RFC 2833 dtmf event as outlined at http://www.ietf.org/rfc/rfc2833.txt obtaining the following behaviour when the E bit is NOT set: If for example keys 7874556332111111145855885#3 are press...

how to implement dtmf

hi any of them know how to implement dtmf in iphone application. thanks in advance. ...

iPhone 3.5mm jack based application

I want to encode data via a DTMF encoder and send it back to the iPhone via the 3.5mm Jack. Is it possible to send data back into the 3.5mm jack. conventionally audio signals are sent out over the iPhone 3.5mm jack? Is there provision to deal with DTMF and 3.5mm jack based input applications in Iphone's External Accessory framework? ...

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 Appengine) ...

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 but I am wondering if anyone knows how to bypass the send DTMF tone prompt. ...

Alloc and init buffer and play DTMF

I want to allocate a memory buffer and initialize it with data of a mathematical equation in order to gain a pure DTMF tone. I am using the AudioQueueServices library to allocate and fill the buffer. I used a formula of 2 sine waves and 2 different frequencies. However, neither a sound nor a tone is not played. It may be important to me...

Generating a tone using DTMF and playing it with AVAudioPlayer.

I want to generate a custom DTMF tone and play it on the iPhone. In order to do so, I have created and allocated a memory buffer with a custom tone (ptr). Now I want to create a NSData object, initialized with the memory buffer, and pass it to AVAudioPlayer using initWithData:error: instance method. I wrote the following code, but when ...

How to obtain Dual Tone signal from DTMF IC6847?

I have to obtain dual tones from DTMF 6847 chip.Which pins are to be shorted to obtain different sets of frequencies so that I can see them on the oscilloscope? Please help. ...

DTMF # and * workaround in iOS4?

Hello all. I have read all the posts about DTMF and iPhone. I know that the characters "#" and "*" are disallowed by the SDK for security reasons. I have tried the stringByAddingPercentEscapesUsingEncoding: and the FURLCreateStringByAddingPercentEscapes workarounds. It is not possible, in my case, to generate the DTMF tones as one pos...

Can we send data across an analog phone line ?

Hi all, I wish to know whether it is possible to sent data across PSTN network. While the call is in progress. I want to sent some data through the telephone line (As DTMF tones can be sent). The data that I want to sent is digital which is encrypted and modulated on an analog carrier (So that it can be send over an analog wire). I have...

Strange flow DTMF capture on tcpdump

Hi, I captured a tcpdump of a SIP call to debug DTMF problem (repeated digits), but I have some problem interpreting it. From what I understand, when I parse the captured traffic through wireshark's "VOIP CALL", I should see something like this (for digits 123) : CAPTURE 1 RTP telephone event DTMF One 1 (end of event) RTP telephone eve...

How can I connect the KT3170 (The DTMF reciever) to USB (4bit data) ?

Hi all, This will be my first try at USB intefacing ! May I know how to transfer the data from pins : 11-15 of KT3170 IC to USB ? Data sheet : http://www.datasheetcatalog.org/datasheet/SamsungElectronic/mXuusvq.pdf I guess I will need to configure a Microprocessor for making the OS uderstand what profile of device is this , In that Case...

Create repeating dtmf tone to play with AVAudioPlayer

HI, i'm trying to create a repeating dtmf tone so i can play it with AVAudioPlayer. Currently when i loop it in some audio editing software such as audacity there is always a glitch or change in tone at the point where it repeats. Is there some particular length of time i need to create it to avoid this. I initally created a one second ...