A voice-enabled user interface and method for enabling a user that is providing audio and vocal input to access data from telephone service systems that are only responsive to dual tone multi-frequency ("DTMF") signals. A user access the voice-enabled user interface with a telephone device and provides...http://www.google.de/patents/US6731724?utm_source=gb-gplus-sharePatent US6731724 - Voice-enabled user interface for voicemail systems
