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asterisk play music while waiting for DTMF...

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Generation and detection of tones...

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iPhone tonepad functionality in two-way/conference calls...

DTMF detection from a wav file...

Generating DTMF tone to send in RTP packet...

Create repeating dtmf tone to play with AVAudioPlayer...

Alloc and init buffer and play DTMF...

Generating a tone using DTMF and playing it with AVAudioPlayer...

Parse (extract) DTMF in Python...

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

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