Multi-mode MiniGBIC module.Applied to TL-SG5428, TL-SL5428E, TL-SG3210/3216/3424/3424P, TL-SL3428/3452, TL-SG2216/2424, TL-SL2210WEB/2218WEB/2428WEB/2452WEB, TL-SL1351 and MC200L.What This Product DoesThe TL-SM311 series Fiber Module Cards are introduced for extending transfer distance. Attached to our managed/smart switches, they can extend the distance to several kilometres even tens of kilometres which can basically satisfy the distance requirement of LAN. Users can choose whether and which items to use the fiber modules according to the demand in order to lower cost.