Slide the SFP module into a 1000Base-X port of the controller/switch until a connection is made and an audible click is heard. Insert the fiber optic cable into the. As seen in the preceding table, SFP+ is a 10 GbE transceiver and SFP28 is a 25 GbE transceiver, both of which can use either fiber or copper media to achieve 10 GbE or 25 GbE communication in each direction. The only thing you really need to know is that the bay is 9. For the shortest connections, passive copper direct attach cable (DAC) is a simple and cost-effective. SFP modules, small form-factor pluggable modules, also known as mini-GBICs, are hot-swappable Gigabit Ethernet optical transceivers.