Artesyn ATCA-F125 Installation and Use Guide (April 2014) - Manual (Page 41)

Hardware Preparation and Installation
ATCA-F125 (6873M Artwork) Installation and Use (6806800J94J) 41
2. Remove the optical port plug.
SFP Module Damage
 The optical port plug protects the sensitive optical fibres against dirt and damage. Dirt
and damage can render the SFP module inoperable.
 Only remove the optical plug when you are ready to connect a cable to the SFP module.
When no cable is connected, cover the port with an optical port plug.