This StarTech.com Gigabit fibre SFP is engineered to deliver reliable network connections. Built to exacting specifications and fully tested to ensure maximum performance, this high-quality fibre transceiver module can be installed into Cisco® switches and routers that support the GLC-LH-SMD transceiver module, as well as other major brands of networking equipment. It provides a dependable and cost-effective way to add, replace or upgrade the ports on your 1000Base-LX/LH networking equipment, and it's backed by a lifetime warranty.