The following description of the 1+1 protection in the board, the correct ones are: (Multiple Choice)

• A.For OSN 1800 devices, you can use the OTU with dual-selection to protect your business.
• B.In-board 1+1 protection can be applied to chain networking and ring networking.
• C.The 1+1 protection on the board can protect the OTU board.
• D.Set the OTU as the detection unit, and the electrical layer alarms such as OTUk_LOF and OTUK_LOM will also trigger the switching.

Comment: *

Name: *

Email: *

Verification: *

During the process of maintaining the OSN device, it is often seen that the fan runs at full speed, and the device reports the TEMP_OVER alarm. What are the common causes and treatment methods?

• A.The dust inside the fan is serious, which affects the speed. You need to remove the fan to remove it.
• B.The dust filter is heavily dusty and affects ventilation. The dust filter needs to be cleaned.
• C.The power module of the board is heavily dusty, affecting heat dissipation, and needs to be removed.
• D.The optical module has an abnormal cooling function and needs to be replaced with a light board.

Comment: *

Name: *

Email: *

Verification: *

Which of the following description of the process for optimizing the line attenuation compensation anomaly is correct? (Multiple choice)

• A.After receiving the alarm, the SOM obtains the OCh path corresponding to the alarm and adds it to the management path to be optimized.
• B.The SCC board at the downstream site of the fault reports the alarm to the power detection unit (OA) of the first node through DCN communication, and reports the alarm to the SOM on the SC of the first node.
• C.According to the user adjustment command, adjust the line attenuation of the OCh path to make the downstream light output reach the normal value.
• D.The downstream power detection unit (OA) detects that the line attenuation deviation exceeds the threshold and reports the alarm to its own SCC board.

Comment: *

Name: *

Email: *

Verification: *

Which of the following statement about the MPLS-TP OAM level is correct?

• A.Tunnel is the service layer of PW, PW is the service layer of Service, and Service is the service layer of Section.
• B.Section is the service layer of PW, PW is the service layer of Tunnel, and Tunnel is the service layer of Service.
• C.Section is the service layer of the tunnel, Tunnel is the service layer of the PW, and PW is the service layer of the Service.
• D.Service is the service layer of the PW, PW is the service layer of the Tunnel, and Tunnel is the service layer of the Section.

Comment: *

Name: *

Email: *

Verification: *

Since the EALC/ALC function is used in the SOM system, there is a possibility of business interruption during optical power adjustment.

• A.FALSE
• B.TRUE

Comment: *

Name: *

Email: *

Verification: *