The adapter must be securely plugged into the SC connector of the Visible Light Dummy GBIC.
After inserting, check if the fiber is protruding from the connector end, and then use it on the actual machine.
(If not enough, the fiber may break in the connector. Please check after temporary.)
The mouth opening length and the clever cutting length is 0.4 - 0.6 inches (10 - 16 mm) and is equivalent to fuse.