Open Source VoiceXML Interpreter over Asterisk for Use in IVR Applications

Much research into building the voice extensible markup language (VoiceXML) interpreters has taken place under commercial setup. This limits researchers who investigate VoiceXML-based IVR applications. This paper presents the upgrading of the open source VoiceXML interpreter, Voxy, which operates over Asterisk as its telephony platform. This software will later be released for open source consumption. So far the open source VoiceXML interpreters include: JVoiceXML, OpenVXI and Voxy. Voxy is the only one that works with Asterisk and therefore was regarded as a starting point. The result found is that the enhanced Voxy has now improved from 6.33% to 96.20% compliancy with the W3C VoiceXML 2.1 standard. The interpreter only uses DTMF for interaction with users. The utilisation of text-to-speech and automatic speech recognition related components will be dealt with as part of the future work.