1. A system for providing voice activated access to information from a plurality of data sources and voice repositories in a single phone call session, the system comprising: a telephony platform; a speech recognizer for recognizing user's voice commands; a plurality of voice grammars that span relevant contexts for all data sources and voice repositories; a plurality of extractors for accessing information from the data sources and voice repositories; and an interpreter for parsing the voice commands recognized using said speech recognizer and said voice grammars and controlling said telephony platform and said means for accessing information.