The following description of the alarm, which is correct? (Multiple choice)
A, C are the WDM OTM stations, and B is the relay station.
When the transmission direction of the A to B stations is interrupted, the Wavelength side of the B-stack OTU relay board reports the R_LOS emergency alarm and runs the processing to the upstream A.
The station side OTU2_BDI secondary alarm. At the same time, the alarm continues to be transmitted to the downstream station of the B station. After the alarm is processed at the C site, the ODU2_PM_AIS minor alarm is reported on the WDM side of the C-site OTU, and the ODU2_PM_BDI secondary alarm is transmitted back to the upstream station A.
Which of the following description of the evolutionist in the mainstream SDN model in the industry is correct? (Multiple Choice)
When creating an OCh trail by using the board method, the source/sink ports select the corresponding line board and the IN/OUT port of the FIU board.
The OSN 8800 device is protected by fan redundancy. When any fan in the fan box is broken, the system can still operate normally for a long time.
