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The PIU on the extended subrack reports a POWER_ABNORMAL alarm. (The actual import voltage is -60 V.) To remove the fault, the customer needs to re-configure the voltage monitor jumpers (J5 and J8) for the power supply of the XCE on the extended subrack (-48 V monitor by default), that is, to remove the caps from J5 and J8.
The customer first sets the jumpers of the currently standby XCE (in slot 60) and install the XCE board and cables. In this case, no exceptional alarm is reported.The customer then performs an active/standby switching of the XCE boards. In this case, all services on the extended subrack are interrupted. About one minute later, the cross-connect board on the master subrack switches from 9 to 10. The services on the extended subrack recover.
The PIU on the extended subrack reports a POWER_ABNORMAL alarm due to the wrong settings of the jumpers on the XCE:
72636 77 POWER_ABNORMAL MJ end
72637 78 POWER_ABNORMAL MJ end
The following alarms appear in order when the customer is configuring the jumpers on the standby XCE (in slot 60):
482895 60 BUS_ERR MJ end
482896 60 BUS_ERR MJ end
482897 60 BUS_ERR MJ end
482898 60 BUS_ERR MJ end
//The preceding lists the alarms after the cable is unplugged.
482900 60 BD_STATUS MJ end
//The preceding is the alarm generated after the board is unplugged and plugged.
The following alarms are generated on the service boards upon the active/standby XCE switching:
482992 51 PLL_FAIL MJ end
482916 52 TU_AIS MJ end
The following alarm is generated on the cross-connect board on the master subrack :
483115 9 BUS_ERR MJ end
The analysis shows that the active board on the master subrack is board before XCE switching on the extended subrack. For this reason, the cable between slot 60 and slot 9 works as the working cable between the master and extended subracks upon the switching. However, the cross-connect board 9 on the master subrack receives a BUS_ERR alarm upon the switching. As a result, automatic switching occurs between the active and standby cross-connect boards on the master subrack. The services run on the cable between slot 60 and slot 10. The following black box shows the switching data (bb9):
Level:3, XcsXcpModule.cpp, Line:2553, XCP switch because
c BUS_ERR or service board report XCS boardThe services recover upon the switching.
Locate and analyze the fault based on the on-site operation, alarms, and black box.In the engineering debugging stage, the field engineers should test the active/standby switching and ensure that all cables are operational.