1. Support 2 port 10/ 100/1000M auto-detect ... 10/100/1000Mbps RJ45 ports and 2 port 1000Mbps SFP Slots•Supports standards, IEEE 802.3z/AB 10/1001000Base ... LC, WDM, multi-mode / single-mode fiber /1000Base-SX / LX SFP. Operating standardsIEEE802.3,IEEE802.3U,IEEE802.3Z , IEEE802.3X, ... WDM 1550/1310nm 20km3CP-4XXL1SN-XX1.25G SFP when choice SFP slots Eth 10/100/1000M 2 SFP and 2 UTP Ethernet Switch