A method of providing telecommunication service includes receiving a call for a called party from a calling party. The method also includes determining a presence status of the called party and communicating a greeting for the calling party, wherein the greeting identifies the presence status of the...http://www.google.fr/patents/US7623633?utm_source=gb-gplus-shareBrevet US7623633 - System and method for providing presence information to voicemail users
System and method for providing presence information to voicemail users
