TP-LINK Gigabit SFP module, 1000Base-SX Multi-mode Fiber Mini GBIC Module, Plug and Play, LC/UPC interface, Up to 550/220m distance (TL-SM311LM) Description The 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 kilometers even tens of kilometers 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. Protocols Supported: IEEE 802.3z CSMA/CD TCP/IP Features: Multi-Mode MiniGBIC module, Supports full-duplex Wave Length: 850nm. Data Rate: 1.25Gbps. Port Type: LC/UPC Max. Cable Length: 550m(1,800 feet) using 50/125um Multi-Mode Fiber, 220m(720 feet) using 62.5/125um Multi-Mode Fiber Always keep the protective dust plug on the SFPs optical bores until you are ready to make a connection Compatible with all SFP ports on TP-Link product including JetStream switches, and media converter MC220L Work with MC200CM with multi-mode fiber connection Product Details: Brand: TP-Link Hardware Interface: GBIC Data Link Protocol: IEEE 802.3 Data Transfer Rate: 1280 Megabits Per Second Item Weight: 100 Grams Product Dimensions: 8.15 x 1.5 x 5.83 inches Item Weight: 3.53 ounces Item model number: TL-SM311LM Is Discontinued By Manufacturer: No Date First Available: March 10, 2010 Manufacturer: TP-Link