This StarTech.com Gigabit fiber SFP is engineered to deliver reliable network connections. Built to exacting specifications and fully tested to ensure maximum performance, this high-quality fiber transceiver module can be installed into Cisco switches and routers that support the GLC-SX-MMD transceiver module, as well as other major brands of networking equipment. This 1000Base-SX SFP delivers Gigabit connectivity over multimode fiber cable, with a range of up to 550 m (1804 ft. ). It provides a dependable and cost-effective way to add, replace or upgrade the ports on your networking equipment.