The S2700 is provided in the standard version (SI) and enhanced version (EI). The S2700 switches of the EI series are collectively called S2700-EI, and the S2700 switches of the SI series are collectively called S2700-SI. S2710-SI is a sub-series switch of S2700-SI. Huawei S2710-52P-PWR-SI switch is a PoE switch, providing 48 Ethernet 10/100 PoE+ ports and 4 Gig SFP.