METHOD FOR DUPLEXING CENTRALIZED OPERATION AND MAINTENANCE SYSTEM IN TIME DIVISION EXCHANGES

摘要

PURPOSE: A method for duplexing a centralized operation and maintenance system in time division exchanges is provided to make another system server collect and analyze a message of a time division exchange immediately when a system server of a network operating system center is in a service impossible state due to the generation of a fault and to forward the collected data logically when the system server gets operated in normal condition. CONSTITUTION: If the output messages of time division exchanges in operation are inputted to repeaters through synchronous and asynchronous lines, the repeaters request call connections to the NUAs(Network User Addresses) of system servers in charge(201). A data communication network requests the call connections to the NUA of a destination system server(202). If the call connection request fails due to an abnormal state of the destination system server(203), the data communication network requests the call connection to an NUA system server that belongs to a hunt group(204). If the hunt group is connected, the repeaters transmit various messages to the NUA system server through the data communication network. The NUA system server collects, analyzes and stores them(210). The repeaters transmit monitoring-required messages to a monitoring unit through a router(212) and makes the messages displayed on the screen so that an operator can monitor the time division exchanges(213).