Remote stage switching network

Claim 1

AN ELECTRONICALLY CONTROLLED SWITCHING NETWORK COMPRISING CROSSBAR SUBSCRIBERS'' SELECTION STAGES FORMING SATELLITE EXCHANGES AND CROSSBAR GROUP SELECTION STAGES FORMING A CENTRAL EXCHANGE SPACED APART FROM ONE ANOTHER, JUNCTORS LOCATED IN SAID CENTRAL EXCHANGE CONSTITUTING TERMINAL CIRCUITS OF PRESELECTION ROUTES THROUGH THE SUBSCRIBERS'' SELECTION STAGES AND INPUT CIRCUITS OF FINAL ROUTES THROUGH THE GROUP SELECTION STAGES AND SUBSCRIBERS'' SELECTION STAGES IN CASCADE, SATELLITE-CENTRAL TRUNKS BETWEEN SAID SUBSCRIBERS'' SELECTION STAGES AND SAID JUNCTORS, CONNECTION LINES BETWEEN JUNCTORS AND SAID GROUP SELECTION STAGES, CENTRAL-SATELLITE TRUNKS BETWEEN SAID GROUP SELECTION STAGES AND SAID SUBSCRIBERS'' SELECTION STAGES, SAID SUBSCRIBERS'' SELECTION STAGES HAVING ROW WLECTROMAGNETS AND COLUMN ELECTROMAGNETS OPERATING CROSSPOINTS CONNECTING SUBSCRIBERS TO SAID JUNCTORS AND SAID CENTRAL-SATELLITE TRUNKS TO SUBSCRIBERS, SAID GROUP SELECTION STAGES HAVING ROW ELECTROMAGNETS AND COLUMN ELECTROMAGNETS OPERATING CROSSPOINTS CONNECTING SAID JUNCTIONS TO SAID CENTRAL-SATELLITE TRUNKS, A SUBSCRIBER SEARCHING DEVICE, FIRST MEANS CONTROLLED BY SAID SUBSCRIBER SEARCHING DEVICE FOR OPERATING THE ROW ELECTROMAGNETS OF THE SUBSCRIBERS'' SELECTION STAGES, A CENTRAL-SATELLITE TRUNK SEARCHING DEVICE, SECOND MEANS CONTROLLED B Y SAID CENTRAL-SATELLITE TRUNK SEARCHING DEVICE FOR OPERATING THE ROW ELECTROMAGNETS OF THE GROUP SELECTION STAGES, A PLURALITY OF PRESELECTION WIRES BETWEEN THE SUBSCRIBERS'' SELECTION STAGES AND THE JUNCTORS, MEANS CONTROLLED BY SAID FIRST ROW ELECTROMAGNET OPERATING MEANS FOR MARKING A NUMBER OF SAID PRESELECTION WIRES, A FIRST ELECTRONIC SELECTOR FOR SELECTING ONE AMONG SAID MARKED PRESELECTION WIRES AND MARKING THE JUNCTOR CONNECTED THERETO, WHEREBY THE COLUMN ELECTROMAGNETS OF THE SUBSCRIBERS'' SELECTION STAGES ADAPTED TO CONNECT A GIVEN CALLING SUBSCRIBER TO THE MARKED JUNCTOR ARE DERIVED FROM THE SELECTED WIRES BETWEEN THE SUBSCRIBERS'' SELECTION STAGES SELECTION WIRES BETWEEN THE SUBSCRIBERS'' SELECTION STAGES AND THE GROUP SELECTION STAGES, MEANS CONTROLLED BY SAID FIRST ROW ELECTROMAGNET OPERATING MEANS FOR MAKING A NUMBER OF SAID FIRST PLURALITY OF FINAL SELECTION WIRES, A SECOND PLURALITY OF FINAL SELECTION WIRES INSIDE THE GROUP SELECTION STAGES, MEANS CONTROLLED BY SAID SECOND ROW ELECTROMAGNET OPERATING MEANS FOR MAKING A NUMBER OF SAID SECOND PLURALITY OF FINAL SELECTION WIRES, A SECOND ELECTRONIC SELECTOR FOR SELECTING ONE FIRST AND ONE SECOND WIRE AMONG SAID MARKED FINAL SELECTION WIRES WHEREBY THE COLUMN ELECTROMAGNETS OF THE SUBSCRIBERS'' SELECTION STAGES AND OF THE GROUP SELECTION STAGES ADAPTED TO CONNECT A GIVEN CALLED SUBSCRIBER TO THE MARKED JUNCTOR ARE DERIVED FROM THE SELECTED FINAL SELECTION WIRES AND MEANS FOR ENERGIZING SAID COLUMN ELECTROMAGNETS.