DECENTRALIZED CONTROL TYPE TIME-DIVISION EXCHANGE

摘要

PURPOSE:To eliminate the need for communication of a processor between blocks during system switching and to switch systems instantaneously by switching systems independently in a faulty block irrelevantly to other precedent and trailing blocks if an act system becomes faulty. CONSTITUTION:The unit control processor of a decentralized time-division exchange consists of a channel device composed of switches ETU0(F)-ETUn(R) of a line concentration means of double structure and a channel controller composed of switches DSU0-DSUn a distribution stage. Transmission parts 9 and 10 for highway information of front-side switches of systems 1 and 0 of the part ETU of this constitution and reception parts 13 and 14 for highway information of rear-side switches of systems 1 and 0 of the part ETU are provided with an interface part respectively. The system 1 and 0 are switched instantaneously independently in the faulty block by the reception side selector 18 of the part DSU of the interface part, transmission-side and reception-side selectors 16 and 19 of the part ETU, and elastic memories 20 and 21.