Patent ID: 11916589
Assignee: NEC CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A submarine device comprising:
a first optical transmission line including a first input node and a first output node;
a second optical transmission line including a second input node and a second output node and that is different from the first optical transmission line;
a first branching unit at each of a plurality of first monitor points set in the first optical transmission line that branches first monitor light and that outputs first branched light;
a second branching unit at each of a plurality of second monitor points set in the set optical transmission line that branches second monitor light and that outputs second branched light;
a first processing unit inserted into the first optical transmission line that processes the first branched light output by the first branching unit at one of the plurality of first monitor points;
a second processing unit inserted into the second optical transmission line that processes the second branched light output by the second branching unit at one of the plurality of second monitor points;
a selecting unit that selects branched light from the first branched light output by the first branching unit at each of the plurality of first monitor points and the second branched light output by the second branching unit at each of the plurality of second monitor points, and that outputs the branched light; and
a monitoring unit that monitors the selected branched light.