A subscriber associates a ring-tone media selection based on a media genre, author, or title to a calling number. When an incoming call is detected, a particular ring-tone media selection, based on the subscriber's association, may be streamed from a central server to the subscriber's customer premises...http://www.google.de/patents/US7233658?utm_source=gb-gplus-sharePatent US7233658 - Flexible ring-tone service
