Artesyn RTM-ATCA-F120 Installation and Use (August 2014) - Manual (Page 42)

Hardware Preparation and Installation
RTM-ATCA-F120-OPT Installation and Use (6806800G29D) 42
3. Grasp the SFP/SFP+ module and carefully slide it out of the slot.
4. Cover the optical port with the optical port plug.
SFP/SFP+ Module Damage
The optical port plug protects the sensitive optical fibres against dirt and damage. Dirt and
damage can render the SFP/SFP+ module inoperable.
Only remove the optical plug when you are ready to connect a cable to the SFP/SFP+ module.
When no cable is connected, cover the port with an optical port plug.