Small form factor pluggables (SFPs) are optical transceivers that can be removed from a PIC (for more information, see Physical Interface Cards (PICs)).
Figure 98: Small Form Factor Pluggable (SFP)

SFPs are hot-insertable and hot-removable. Removing an SFP does not interrupt PIC functioning, but the removed SFP no longer receives or transmits data. To replace an SFP, perform the following procedures: