A method and system that enables a subscriber and/or operator to specify one or more conditions under which a given feature such as a supplementary service (SS) is to be executed. When a call event occurs, the relevant telecommunications network evaluates a logical expression that includes variables...http://www.google.com/patents/US6295447?utm_source=gb-gplus-sharePatent US6295447 - Method and system for enabling the control of execution of features in a telecommunications network
