H31-321 Web TestEngine demo

Select all that apply.

• A

  When installing or maintaining an optical interface board or optical fibers, do not look into the optical interface board or fiber connectors.

• B

  You need to disconnect the fiber jumper from the optical interface board of the peer NE when using an
  optical time domain reflectometer (OTDR).

• C

  Use protective caps to cover unused optical ports and optical connectors of fiber jumpers.

• D

  You can replace optical interface boards or optical modules during equipment-side maintenance.