Abstract: In the development of development systems, efforts are being made to design software systems which are as modular as possible for controlling the switching system. Efforts are also being made to achieve this aim for the call processing system for controlling connections in a switching system. The basic structure of the call processing system has a signaling interface system and a call control system, both of which are limited to logic connection control and submit autonomous connection requests to a resource control system which carries out the physical connection control. The call processing system furthermore has a coordination system for coordinating the autonomous connection requests with respect to the resource control system.

Abstract: A coordination system coordinates connection requests of a modular connection system to a switching control system. The connection system controls connections at a logic level, and the switching control system controls connections at a physical level. Coordination modules have the following elements. A receiver receives and buffer-stores connection requests produced from the connection system for an active connection end point involved with a connection. A connection request, which is buffer-stored by the coordination modules, is passed on to the switching control system when the coordination modules have received control over an active connection end point. Control over a specific active connection end point is surrendered to one another such that only one coordination module has control over this specific active connection end point at a specific point in time.