System for coordinating a plurality of synchronized time division multiplex systems

Claim 1

IN A TELECOMMUNICATION EXCHANGE SYSTEM FOR EXTENDING CONNECTIONS BETWEEN CALLING AND CALLED ONES OF A PLURALITY OF MULTI-CHANNEL LINES, A PLURALITY OF SYNCHRONIZED TIME DIVISION MULTIPLEX SYSTEMS EACH SERVING A DIFFERENT GROUP OF SAID LINES, A MEMORY DEVICE IN EACH OF SAID MULTIPLEX SYSTEMS AND INDIVIDUAL THERETO, EACH OF SAID INDIVIDUAL MEMORY DEVICES INCLUDING A SEPARATE GROUP OF STORAGE DEVICES FOR EACH CHANNEL OF THE ASSOCIATED MULTIPLEX SYSTEM AND INCLUDING READING AND RECORDING MEANS, MEANS INCLUDING THE SAID READING AND RECORDING MEANS FOR CYCLICALLY READING AND RECORDING ASSOCIATED MULTIPLEX SYSTEM LINE CONNECTION INFORMATION IN THE ASSOCIATED GROUP OF STORAGE DEVICES AT A SCANNING RATE EQUAL TO THE FREQUENCY OF SAID MULTIPLEX SYSTEMS, CONTROL MEANS COMMON TO ALL SAID MULTIPLEX SYSTEMS INCLUDING A COMMON MEMORY DEVICE, SAID COMMON MEMORY DEVICE INCLUDING A SEPARATE GROUP OF COMMON STORAGE DEVICES FOR EACH CHANNEL OF EACH OF SAID SYSTEMS AND INCLUDING COMMON READING AND RECORDING MEANS, AND MEANS INCLUDING THE COMMON READING AND RECORDING MEANS FOR CYCLICALLY READING AND RECORDING LINE CONNECTION INFORMATION FOR ALL OF SAID MULTIPLEX SYSTEMS IN THE SAID GROUPS OF COMMON STORAGE DEVICES AT A SCANNING RATE WHICH IS A SUBMULTIPLE OF THE SAID MULTIPLEX SYSTEM FREQUENCY.