StarTech.com Cisco GLC-LH-SMD Compatible SFP Module, 1000BASE-LX/LH, 1GbE Single Mode (SMF) Fiber Optic Transceiver, 1GE Gigabit Ethernet SFP, LC Connector, 10km, 1310nm, DDM, Firepower - Lifetime Warranty (GLCLHSMDST) - SFP (mini-GBIC) transceivermodul - 1GbE