For emergency handling of business interruptions, fault location should be performed as soon as possible, and then the business should be resumed.

In the case of the OptiX OSN equipment, when the standby board is normal, which of the following operations does not cause the active/standby switching of the cross-connect board or clock board?

Which of the following standards must be met for the isolation test in the feature test of the multiplexer/demultiplexer?

The following description of the Flexible ROADM, which is wrong?

When creating a Client path using the path method, if the RL0S alarm is generated on the line card, the path cannot be created.