Experience Portal allows VoiceXML applications to send DTMF digits. This feature is most commonly used when an application running on Experience Portal communicates with an automated system and not with a human being. This is also used when applications communicate with network routing, such as Cisco ICM for "tack back and transfer" applications. Previously, the only way for Experience Portal applications to send DTMF digits was to play an audio file that contained a recording of the digits to be sent.
The following is a sample VoiceXML application that demonstrates how to send the digits 1 2 3 4:
<?xml version="1.0" encoding="UTF-8"?>
<vxml version="2.1"
xmlns="http://www.w3.org/2001/vxml"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.w3.org/2001/vxml
http://www.w3.org/TR/2007/REC-voicexml21-20070619/vxml.xsd">
<form>
<field>
<prompt>
<audio src="builtin://senddigit/1234"/>
</prompt>
</field>
</form>
</vxml>
