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, and it's backed by a lifetime warranty. This multimode SFP transceiver is manufactured by StarTech.com to meet or exceed OEM specifications and comply with the industry's MSA (Multi-Source Agreement) standards. Committed to the highest standards of quality, StarTech.com provides an extensive range of networking products including copper and fiber network cards, fiber media converters, Ethernet switches and wireless products. The MM Gigabit SFP is engineered to the highest quality standards and is 100% Cisco compatible, equivalent to the Cisco GLC-SX-MMD SFP transceiver. The StarTech.com SFP transceiver is configured and fully tested to ensure it works seamlessly with Cisco or other major brands of networking equipment.