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VoiceXML is a programming language that was created to simplify the development of Interactive Voice Response (IVR) systems and other voice applications. Based on the Worldwide Web Consortium's (W3C's) Extensible Markup Language (XML),VoiceXML was established as a standard in 1999 by the VoiceXML Forum, an industry organization founded by AT&T, IBM, Lucent and Motorola. Today, over 600 companies support VoiceXML and use it to develop applications.

By utilizing the same networking infrastructure, HTTP communications, and markup language programming model, VoiceXML leverages an enterprises existing investment in technology as well as the skills of many of its application developers and administrators.

VoiceXML has features to control audio output, audio input, presentation logic, call flow, telephony connections, and event handling for errors. It serves as a standard for the development of powerful speech-driven interactive applications accessible from any phone.

How VoiceXML Works

Designed to leverage Web infrastructure, VoiceXML is analogous to HTML, which is a standard for creating Web sites. Similar to HTML, the development of voice applications using Voice is simple, straightforward and does not require specialized knowledge of proprietary telephony systems. Since the intricacies of developing voice applications are hidden from developers, they can focus on business logic and call flow design rather than on complex platform and infrastructure details.