StarTech.com Cisco GLC-SX-MM Compatible SFP Module - 1000BASE-SX Fiber Optical SFP Transceiver - Lifetime Warranty - 1 Gbps - Maximum Transfer Distance: 550 m (1804 ft)The SFPGLCSXMMST is a Cisco GLC SX MM compatible fiber transceiver module that has been designed, programmed and tested to work with Cisco brand switches and routers. It delivers dependable 1GbE (1000 Mbps) connectivity over fiber cable, for 1000BASE SX compliant networks, with a maximum distance of up to 550 m (1804 ft). Hot swappable with fiber optic modules Low power consumption of less than 1 W Meets or exceeds OEM specifications and Multi Source