During tests of alarms using Agilent Omni718 SDH Analyzer and NG-SDH equipments with SEP (EU-0X), if the equipment is configured with V100R003 (5.36.13.xx) software version, when you send LOF alarm from SDH analyzer (electrical STM-1), the alarm rise in the management and in a few seconds it is cleared and AU_LOP, J0_MM, B1_EXC and B2_EXC rise in the management. After that, the system do not recover since you reset the board, insert LOS or open the cable.
This phenomenon does not occurr with MP1570 equipment, but it also happened with Anritsu ANT-20 a few times.
Because of an incompatibility between the software version and the test equipments, when you insert LOF from SDH analyzer, the NG-SDH equipment looses the pointer. That is why it report AU_LOP, J0_MM, B1_EXC and B2_EXC in the management.
If you downgrade the equipment version software, this problem do not happen.
This problem only happen with test equipment. It should be clear that it does not affect a real network.