VPLS (Virtual Private LAN Service) is a Layer 2 VP technology that simulates a local area network.

When the board detects that the error rate of the regenerator section signal exceeds 10 by detecting the B1 byte, the B1_SD alarm is reported.

Path method creates OCh failure, what are the possible reasons? (Multiple Choice)

In the non-aggregated OTU processing SDH standard signal scenario, both A and B are WDM stations, and the R_Los alarm is detected on the client side of the OTU of the A station. After the alarm is processed on the WDM side of the OTU, the client side of the downstream B station detects and reports the REM_SF alarm, and the B station transmits the signal to the downstream client device and reports the R_LOS alarm to the client device.

When creating an electric layer path, one RX/TX port can only establish a connection with one optical channel of the clientLP port.