Tp-Link TL-SM311LM Gigabit SFP module - 1000Base-SX Multi-mode Fiber Mini GBIC Module - 

TP-LINK TL-SM311LM - Gigabit SFP module - 1000Base-SX Multi-mode Fiber Mini GBIC Module - Up to 550/220m distance - Plug and Play - LC/UPC interface...