Allied Telesis AT-FS750/48 - Manual (Page 40)

Chapter 2: Installation
40
4. Slide the SFP transceiver into an SFP slot on the switch, as shown in
Figure 12.
Figure 12. Inserting the SFP
5. Repeat steps 2 through 4 if you are installing another SFP transceiver.
Note
SFP transceivers are dust sensitive. When a fiber optic cable is not
installed, or when you store the SFP, always keep the plug in the
optical bores. When you do remove the plug, keep it for future use.
Note
Unnecessary removal and insertion of an SFP can lead to
premature failure.
For information about cabling for the SFP, consult the documentation
that was shipped with the SFP.