Voicent Gateway

Voicent Gateway is ideal for developing desktop voice applications such as the Voicent Messenger Personal Version. These Applications can also use the same Voicent Gateway so people in the same office can share the same telephone line. Voicent Gateway extends the boundaries of business and the web by enabling rapid design and deployment of voice applications. Based on the Open VoiceXML standard, Voicent Gateway enables interactive voice access to the web and enterprise systems from any telephone.

http://www.voicent.com/gateway.php