In a conventional electronic exchanger, a common bus repeater duplexer (a double bus relay relay system)

摘要

The present invention relates to a common bus repeater duplexer in an electronic exchanger suitable for normally performing a common bus function without interruption of fault isolation and interruption of one backboard failure attempt service. In the conventional technology, There is a drawback in that it is difficult to isolate the faults and the faults can be transmitted to the other bus due to the failure of the one bus and the operation of the entire bus structure becomes impossible in the case of the back board failure. In the case of implementing both redundancy functions, it is possible to perform normal operation even if a failure occurs in either one of the relay functions by connecting the signals in the form of a cross signal. Also, by using such a bus relay function, In addition to isolating faults, The common bus function can be normally performed without interruption of the service, thereby improving the reliability of the service, thereby improving the aforementioned drawbacks.