A.Optical line protection

B.1+1 protection inside the board

C.Customer side 1+1 protection

D.ODUk SNCP protection

A.Check the room temperature, humidity and cleanliness

B.Check the cabinet and board indicators

C.Check the fan box and clean the air filter

D.Check device sound alarms

A.Set the OTU as the detection unit, and the electrical layer alarms such as OTUk_LOF and OTUK_LOM will also trigger the switching.

B.In-board 1+1 protection can be applied to chain networking and ring networking.

C.For OSN 1800 devices, you can use the OTU with dual-selection to protect your business.

D.The 1+1 protection on the board can protect the OTU board.

A.Ring

B.Mesh

C.Point to point

D.Chain type

A.Establish and maintain an ECC routing table.

B.Provide data communication services.

C.Establish and maintain a MAC connection between neighboring network elements.

D.Provide end-to-end communication services to the upper layer