Circuit arrangement for telecommunications exchang

专利名称：Circuit arrangement for telecommunications

exchanges

发明人：Werner Nagler,Fritz Hlawa,Lothar Schmidt申请号：US07/410684申请日：19890921公开号：US05043978A公开日：19910827

摘要：In a circuit arrangement for telecommunications exchanges, including PCM timedivision multiplex telephone exchanges with a central switching array and connectedsubordinate switching arrays, line terminal groups connected to a central switchingnetwork by way of link connections where each line terminal group has its ownsubordinate switching array and a group control unit are arranged in pairs. Within eachline terminal group, there is terminal equipment for connection of outside lines on theone hand, and on the other hand link terminating circuits for the link connections to thecentral switching array can also be switched from the subordinate switching array of therespective line terminal group to that of the partner line terminal group. Terminalequipment and link terminating circuits as well a subordinate control units with

subordinate switching arrays are equipped with three internal power supply systems andthree internal clock pulse supply systems per line terminal group. The terminalequipment, subordinate control system with subordinate switching array and linkterminating circuits all operate in plesiochronous operation. In a switching operation, theclock pulse supply of the terminal equipment being switched receives its master clockpulse from the subordinate control system of the partner line terminal group.

申请人：SIEMENS AKTIENGESELLSCHAFT

代理人：Adel A. Ahmed

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