Send DTMF

To send a specific DTMF tone to the caller on the outgoing stream, specify it in the audio src attribute in VXML. The Send DTMF functionality generates (RTP-NTE) events and sends them on outgoing stream as per RFC2833.

Format:

<audio src="builtin:senddtmf/<DTMF-DIGITS 0-9*#>" />

Example:


<?xml version="1.0"?>
<vxml version= "2.1"
xmls="http://www.w3.org/2001/vxml">
<form>
	<prompt>
            <audio src=”builtin:senddtmf/12345” />
      </prompt>

</form>
</vxml>

Note	Prompts queued prior to the Send DTMF audio element cannot barge-in even if the `barge in` property is set to `true`. Clear the Use Default Audio Path check box in call studio element in audio dialog while using Send DTMF.