A personalized annunciating signaling telephone unit delivers a first outgoing message to a caller identifying a plurality of codes which may be entered by the caller in order to identify the particular party the caller wishes to talk to. Once the caller enters one of the codes, a particular ring signal...http://www.google.com/patents/US5598461?utm_source=gb-gplus-sharePatent US5598461 - Personalized annunciation signaling phone unit
