Time-division multiplex telephone system

Claim 1

IN A SWITCHING ARRANGEMENT OVER WHICH IS CONDUCTED THE TRAFFIC OF A PLURALITY OF TIME-DIVISION MULTIPLEX TELEPHONE COMMUNICATION SYSTEMS, EACH HAVING A TELEPHONE MULTIPLEX LINE TO WHICH THE SUBSCRIBERS OF THE CORRESPONDING SYSTEMS ARE PERIODICALLY CONNECTED IN PULSE-WISE FASHION IN EACH CASE BY MEANS OF SPEECH SWITCHES, SAID ARRANGEMENT BEING CONSTRUCTED AS A CROSS WIRE COUPLING FIELD WHICH HAS, IN ADDITION TO COUPLING POINT CONTACTS FOR CARRYING THE TRAFFIC BETWEEN DIFFERENT SUCH TIME-DIVISION MULTIPLEX TELEPHONE COMMUNICATION SYSTEMS, WHICH COUPLING POINT CONTACTS ARE ASSOCIATED IN EACH CASE WITH A COMBINATION PAIR OF TELEPHONE MULTIPLEX LINES OF SAID COMMUNICATION SYSTEMS AND COUPLING POINT CONTACTS FOR CARRYING OUT TRAFFIC WITHIN THE INDIVIDUAL TIME-DIVIDION MULTIPLEX TELEPHONE COMMUNICATION IN EACH CASE WITH A MULTIPLEX LINE OF TACTS ARE ASSOCIATED IN EACH CASE WITH A MULTIPLEX LINE OF ADDITIONAL TIME-DIVISION MULTIPLEX COMMUNICATION SYSTEMS WHICH HAVE SPEECH ENERGY STORERS INSTEAD OF SUBSCRIBERS, ALSO ADDITIONAL COUPLING POINT CONTACTS WHICH IN EACH CASE ARE ASSOCIATED WITH A COMBINATION PAIR OF A TELEPHONE MULTIPLEX LINE AND A MULTIPLED LINE OF ADDITIONAL TIME-DIVISION MULTIPLED TELEPHONE COMMUNICATION SYSTEMS HAVING LINES LEADING TO OTHER CENTRAL EXCHANGES RATHER THAN SUBSCRIBERS; THE IMPROVEMENT WHICH COMPRISES, DISPOSED IN THE COUPLED FIELD, ADDITIONAL COUPLING POINT CONTACTS WHICH IN EACH CASE ARE CONNECTED WITH THEIR ONE TERMINAL TO A SPECIAL MULTIPLEX LINE AND WITH THEIR OTHER TERMINAL TO ONE THE MULTIPLEX LINES OF THE ADDITIONAL TIME-DIVISION MULTIPLEX COMMUNICATION SYSTEMS HAVING LINES LEADING TO OTHER EXCHANGES, OVER WHICH ADDITIONAL COUPLING POINT CONTACTS CAN BE CARRIED THE TRAFFIC BETWEEN SAID ADDITIONAL TIME-DIVISION MULTIPLEX TELEPHONE COMMUNICATION SYSTEMS, AND SPECIFICALLY IN EACH CASE BY PULSEWISE CLOSURE OF SUCH ADDITIONAL COUPLING POINT CONTACTS, AS WELL AS COUPLING POINTS CONTACTS WHICH BELONG TO COMBINATION PAIRS OF MULTIPLEX LINES WHICH IN EACH BASE CONSIST OF A MULTIPLEX LINE OF SUCH ADDITIONAL TIME-DIVISION MULTIPLEX COMMUNICATION SYSTEM HAVING LINES LEADING TO OTHER EXCHANGES AND A MULTIPLEX LINE OF ONE OF THE ADDITIONAL TIME-DIVIDION MULTIPLEX LINE OF ONE OF THE ADHAVING SPEECH ENERGY STORES INSTEAD OF SUBSCRIBERS, VIA WHICH COUPLING POINT CONTACTS THE TRAFFIC CAN BE CARRIED WITHIN THE ADDITIONAL TIME-DIVISION MULTIPLEX COMMUNICATION SYSTEMS HAVING LINES FOR OUTGOING AND INCOMING TRAFFIC WHICH LEAD TO OTHER CENTRAL EXCHANGES.