AddOn Transceiver/Media Converter - 1 x Network (RJ-45) - Multi-mode, Single-mode - Gigabit Ethernet - 10/100/1000Base-TX, 1000Base-X, 1000Base-SX, 1000Base-LX, 1000Base-BX - 1 x Expansion Slots - SFP (mini-GBIC) - 1 x SFP Slots - Standalone: