A METHOD FOR SUPERVISING STATUS OF DUAL PROCESSORS IN ORDER TO OVERCOME TEMPORARY DUAL CHANNEL TROUBLE IN ATM SWITCH

摘要

PURPOSE: A method for monitoring a state of a duplex processor to recover a temporary duplex channel communication fault of an ATM(Asynchronous Transfer Mode) exchange is provided to divide a case where a hardware fault is generated in a standby processor and a case whether a hardware fault is not generated, so as to effectively monitor an actual state of the standby processor. CONSTITUTION: A processor state monitor(31) delivers a state request to an active processor(32). The active processor(32) delivers the state request to a standby processor(33) to obtain a state of the standby processor(33). If a state response is not received from the standby processor(33) in a predetermined time, the active processor(32) sets up a state of the standby processor(33) as 'unknown' and transmits a state of the active processor(32) itself and the 'unknown' state of the standby processor(33) to the processor state monitor(31). If a frequency of 'unknown' states is over a predetermined frequency, or n, the processor state monitor(31) sets up a state as 'abnormal'. And if the frequency of 'unknown' states is not over the predetermined frequency, or n, the processor state monitor(31) maintains a prior state.