A common adjunct switch in association with a communications network provides a number of functionalities, one of which allows associated subscribers to customize the way in which they receive telephone calls and access enhanced services, such as a facsimile service. In particular, each subscriber may...http://www.google.fr/patents/US5384831?utm_source=gb-gplus-shareBrevet US5384831 - System for providing personalized telephone calling features
System for providing personalized telephone calling features
