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Review: Telera DeVXchange (Part I)

  • By Hitesh Seth
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Debug Logs

One of the features introduced by VoiceXML 2.0 was the <log> tag. This tag allows developers of VoiceXML applications to uniformly log any required messages, variable values etc. to either analyze them for future debugging needs or just for an audit trail. This information is highlighted by the "Debug Logs" tool. Similar to the Call Tracer tool, this information is also available after the call has ended as well for future analysis.


Voice Recorder & Audio Converter

A rule of thumb in creating interactive dynamic speech recognition applications is to use Text-to-Speech cautiously. VoiceXML allows the use of pre-recorded audio as output prompts. To enable the rapid development of these prompts, CodeCenter allows the developer to create these prompts in his/her own voice (or maybe a voice of a colleague) using a phone. The Voice Recorder then allows the developer to download the pre-recorded prompts into the web server.

Finally if you have already created a bunch of audio files in your computer using your favorite audio recording tool, you can convert them into the audio format supported by CodeCenter or your Text-to-Speech engine and telephony boards using the Audio Converter. A number of formats are supported for inter-conversion, including Windows WAV, Dialogic VOX, Sun Microsystems AU and Macintosh HCOM.


The "tech resources" section of the CodeCenter community provides a bunch of technical resources which can be useful for beginning to advanced developers. This includes code and VoiceXML application samples (including dynamic samples using ASP/JSP scripting technology), a VoiceXML Reference Guide, a set of professionally recorded reusable audio-prompts and technical white-papers.

To be Continued

In the next issue of our continuation of the review of Telera DeVXchange  we will take a look at the Grammar Verifier tool, outbound calling functionality and we will also review some interesting extensions that Telera has developed for call-control within VoiceXML applications.


About Hitesh Seth

A freelance author and known speaker, Hitesh is a columnist on VoiceXML technology in XML Journal and regularly writes for other technology publications including Java Developer's Journal, Web Services Journal and The Computer Bulletin on emerging technology topics such as J2EE, Microsoft .NET, XML, Wireless Computing, Speech Applications, Web Services & Enterprise/B2B Integration. He is the conference chair for VoiceXML Planet Conference & Expo. Hitesh received his Bachelors Degree from the Indian Institute of Technology Kanpur (IITK), India. Feel free to email any comments or suggestions about the articles featured in this column at hks@hiteshseth.com.

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This article was originally published on December 2, 2002

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