Circuit arrangement for telecommunication switching systems conn

Circuit arrangement for telecommunication switching systems, par

Circuit arrangement for telecommunications switching systems, pa

Circuit for regulating current in a PBX loop

Circuit for translating telephone numbers

Combined caller and agent endpoint manager

Common channel signaling message intercept system

Communication arrangement

Communication center methods and apparatus

Communication control apparatus and method and communication exc

Communication network with hidden calling number capability

Communication of user data to an automatic call distributor...

Communication switching system with performance characteristics

Communication system and call processing method

Communication system distributed processing message delivery sys

Communication system employing a personal assistant server...

Communication system employing a personal assistant server...

Communication system for telecommunication relay services

Communication system supporting remote operations

Communication system, exchange and extension call processing...