A communication switching system, composed of a performance characteristics system (LMS) and a base switching system (BVS), whereby the base switching system (BVS) has a basic call controller (BRS) for controlling a 2-party call composed of two connections communicating via messages with respectively...http://www.google.se/patents/US5883952?utm_source=gb-gplus-sharePatent US5883952 - Communication switching system with performance characteristics system and a base switching system
