Centrally controlled telecommunications exchange system

Abstract From the Canadian patent

In a telecommunications exchange system consisting of a central, section comprising a central switching network and a central coordination processor, and consisting of line trunk groups which are connected to the switching network via allocatable connection paths and which each comprise a subsidiary switching network and a subsidiary control unit, between the coordination processor on the one hand and each of the subsidiary control units on the other hand a control channel exists via which the former at all times has access to each of the. latter. With the start-up of an entire exchange system or only of individual line trunk groups the coordination, processor loads the subsidiary control …