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    Spare channel system for sectionalizing a communication line circuit
    1.
    发明授权
    Spare channel system for sectionalizing a communication line circuit 失效
    用于通信通信线路电路的分频通道系统

    公开(公告)号：US3588824A

    公开(公告)日：1971-06-28

    申请号：US3588824D

    申请日：1969-09-04

    申请人： GEN SIGNAL CORP

    发明人： BARKER WILLIAM M

    IPC分类号： H04Q5/00 ,  H04Q9/00

    CPC分类号： H04Q5/00

    摘要： A COMMUNICATION LINE CIRCUIT CONNECTS A CONTROL OFFICE STATION WITH A PLURALITY OF SUCCESSIVE REMOTELY SPACED FIELD STATIONS. AN AUXILIARY LINE CIRCUIT EXTENDS FROM THE CONTROL OFFICE TO THE MOST REMOTE FIELD STATION. THE COMMUNICATION LINE CIRCUIT IS NORMALLY ENERGIZED, AND A LINE DETECTOR RELAY AT EACH STATION SENSES SUCH ENERGIZATION. IN CASE OF LINE CIRCUIT FAILURE, THE DROPPING AWAY OF THE DETECTOR RELAYS AT VARIOUS STATIONS ACTIVATES SECTIONALIZING MEANS AND INDICATORS AT THE CONTROL OFFICE MANIFEST THE GENERAL AREA OF THE FAILURE. CONTROLS FOR DESECTIONALIZATION CAN BE TRANSMITTED FROM THE CONTROL OFFICE TO THE SEVERAL FIELD STATIONS TO PUT THE LINE CIRCUIT BACK TOGETHER STATION-BY-STATION AS DESIRED TO COMMUNICATE WITH FIELD STATIONS AHEAD OF THE FAILURE DIRECTLY FROM THE CONTROL OFFICE OVER THE COMMUNICATION LINE CIRCUIT AND TO COMMUNICATE WITH FIELD STATIONS BEYOND THE FAILURE THROUGH THE SECTION OF THE COMMUNICATION LINE CIRCUIT BEYOND THE FAILURE AND OVER THE AUXILIARY LINE CIRCUIT TO THE CONTROL OFFICE.