Abstract 1,006,127. Automatic exchange systems. STANDARD TELEPHONES & CABLES Ltd. Jan. 17, 1964 [Jan. 18, 1963], No. 2175/64. Addition to 946,263. Drawings to Specification. Heading H4K. In a system comprising a route selection network which simulates a connecting network wherein all free paths are first marked and then, at each stage of the network, one free path is selected by a succession of blocking operations whereafter the path through the connecting network corresponding to that selected by the selection network is set-up, the means for performing the blocking of the paths at each stage are combined into a common test unit and the similar plurality of means for setting-up the path through the connecting network are combined into a common control unit. Since the control units are relatively slow operating more than one may be provided. Preferably the test units are duplicated and either used alternately or one may be kept as a stand-by unit. A standby control unit may be provided. A test unit and a control unit may be combined into a single unit for use in small exchanges. The units may be used on a T.D.M. bases.
AN AUTOMATIC TELEPHONE SWITCHING SYSTEM COMPRISING A PLURALITY OF SUBSCRIBER STATIONS, LINE CIRCUITS ASSOCAITED WITH WACH OF SAID STATIONS, CONNECTION NETWORK MEANS COMPRISING A PLURALITY OF PATHS FOR LINKING CALLING ONES OF SAID SUBSCRIBER STATIONS TO CALLED ONES OF SAID SUBSCRIBER STATIONS, PILOTING NETWORK MEANS COMPRISING A PLURALITY OF SELECTED PATHS EXTENDING BETWEEN ALL OF SAID STATIONS, EACH OF SAID SELECTED PATHS BEING ANALOGOUS TO ONE OF SAID PLURALITY OF PATHS, MARKING MEANS INCLUDED IN SAID PILOTING NETWORK MEANS OPERATED RESPONSIVE TO DIRECTIVE SIGNALS FROM SAID CALLING STATIONS FOR MARKING SAID CALLING LINE CIRCUIT AND SAID CALLED LINE CIRCUIT, MEANS FOR TRANSMITTING FIRST PILOT SIGNALS FROM SAID MARKED CALLING LINE CIRCUIT TOWARD SAID MARKED CALLED LINE CIRCUIT AND FOR SENDING SECOND PILOT SIGNALS FROM SAID MARKED CALLED LINE CIRCUIT TOWARD SAID MARKED CALLING LINE CIRCUIT THROUGH ALL AVAILABLE ONES OF SAID SELECTION PATHS, SELECTION MEANS FOR PROGRESSIVELY BLOCKING A PART OF SAID AVAILABLE SELECTION PATHS THROUGH SAID SELECTION NETWORK, UNTIL A SINGLE SELECTION PATH IS SELECTED, AND MEANS RESPONSIVE TO SAID SELECTION OF SAID ONE SELECTED PATH FOR SWITCHING THROUGH SAID CONNECTION MEANS TO LINK SAID CALLING STATION TO SAID CALLED STATION OVER THE PATH ANALOGOUS TO SAID SELECTED SELECTION PATH.
Claim 2
Dependent Claim
201 words
AN AUTOMATIC TELEPHONE SWITCHING SYSTEM COMPRISING A PLURALITY OF SUBSCRIBER STATIONS, LINE CIRCUITS ASSOCAITED WITH WACH OF SAID STATIONS, CONNECTION NETWORK MEANS COMPRISING A PLURALITY OF PATHS FOR LINKING CALLING ONES OF SAID SUBSCRIBER STATIONS TO CALLED ONES OF SAID SUBSCRIBER STATIONS, PILOTING NETWORK MEANS COMPRISING A PLURALITY OF SELECTED PATHS EXTENDING BETWEEN ALL OF SAID STATIONS, EACH OF SAID SELECTED PATHS BEING ANALOGOUS TO ONE OF SAID PLURALITY OF PATHS, MARKING MEANS INCLUDED IN SAID PILOTING NETWORK MEANS OPERATED RESPONSIVE TO DIRECTIVE SIGNALS FROM SAID CALLING STATIONS FOR MARKING SAID CALLING LINE CIRCUIT AND SAID CALLED LINE CIRCUIT, MEANS FOR TRANSMITTING FIRST PILOT SIGNALS FROM SAID MARKED CALLING LINE CIRCUIT TOWARD SAID MARKED CALLED LINE CIRCUIT AND FOR SENDING SECOND PILOT SIGNALS FROM SAID MARKED CALLED LINE CIRCUIT TOWARD SAID MARKED CALLING LINE CIRCUIT THROUGH ALL AVAILABLE ONES OF SAID SELECTION PATHS, SELECTION MEANS FOR PROGRESSIVELY BLOCKING A PART OF SAID AVAILABLE SELECTION PATHS THROUGH SAID SELECTION NETWORK, UNTIL A SINGLE SELECTION PATH IS SELECTED, AND MEANS RESPONSIVE TO SAID SELECTION OF SAID ONE SELECTED PATH FOR SWITCHING THROUGH SAID CONNECTION MEANS TO LINK SAID CALLING STATION TO SAID CALLED STATION OVER THE PATH ANALOGOUS TO SAID SELECTED SELECTION PATH.