Add reliable, cost-efficient Gigabit Ethernet connections over single-mode/multi-mode fiber with this Mini-GBIC module - 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-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. Built for reliable network performance This single-mode/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. Fully compatible with Cisco and other major brands The SM/MM Gigabit SFP is engineered to the highest quality standards and is 100-Percent Cisco compatible, equivalent to the Cisco GLC-LH-SMD 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. You can be assured that the use of StarTech.com SFP products should not affect the warranty protection of your networking equipment.