The version of the T2000 is V2R2, and the NE version of the OSN1500B equipment is 18.104.22.168. PD1 boards in slot 6 and slot 7 consist of the TPS group,
and slot 7 is the work board, while slot 6 is the protection board. First we made a loop on the work board(slot 7) on the first channel, then we did cold reset for the board. The wait and restore time of the TPS is 600s.
Original there were "T_ALOS" and "DOWN_E1_AIS" alarms for the work board in slot7.
When we made the loop on the work board, "LOOP_ALM" was reported, and the "T_ALOS" alarm was cleared.
After the work board was cold reset, the "TPS_ALM"(slot 6) and "BD_STATUS"(slot 7) alarms were reported, "Loop_ALM" was
cleared, and the original alarms "T_ALOS" and "DOWN_E1_AIS" of the work board were cleared and reported by the protection board in slot 6.
at the same time, two "TU protect switching" were reported in the abnormal event, one is about the autoswitching, and the other one is about the waiting to restore.
when the cold reset complete, two copies of "Circuitpack online event" about the PD1(slot 7) and D12S(slot 15) were reported.
After 10 mins, "TU protect switching" was reported again in the abnormal event, "TPS_ALM" on the protection board was cleared, the "T_ALOS" and "DOWN_E1_AIS"
alarms on the protection board were cleared and reported on the work board again.
When TPS took place, "LOOP_ALM" was cleared, and the cleared "T_ALOS" was reported by the protection board in slot 6. so we can deduce that the loop in
the work board was released.
For the OSN1500 equipment (22.214.171.124), When TPS takes place, the loop on the work board will be released though all the service was moved to the protection