You are a developer who completed tens of projects till now but still no voice application project? You exposed your company legacy application on all modern channels Web, PDA but you’d like to expose it also on the PSTN network? This post may offer you a starting hint:
I will cite from http://www.voicexml.org:
“Voice Extensible Markup Language (VoiceXML) is a markup language for creating voice user interfaces that use automatic speech recognition (ASR) and text-to-speech synthesis (TTS). AT&T, IBM, Lucent and Motorola founded the VoiceXML Forum, a global industry organization, in March, 1999 to promote and to accelerate the adoption of VoiceXML-based applications worldwide.
More than 10,000 commercial VoiceXML-based speech applications have been deployed across a diverse set of industries, including financial services, government, insurance, retail, telecommunications, transportation, travel and hospitality. Millions of calls are answered by VoiceXML applications every day!”
Start something practical or starting hints for developers: