Expanding your switch's capacity for networking doesn't need to be complicated. Formerly Linksys Business Series, now Cisco Small Business Network Accessories, the MFEFX1 100 Base-FX Mini-GBIC SFP Transceiver offers the ability to connect to legacy fiber optic interfaces. Installing the module is as easy as sliding it into an accompanying port on a compatible Cisco switch. Additional features of the Cisco MFEFX1 100 Base-FX Mini-GBIC SFP Transceiver include: -Faster networking in a mini GBIC format. -Easy installation. -A maximum fiber optic cable distance of 2 kilometers. -Low insertion-loss duplex LC receptacle & low electromagnetic interference.