The SFPGLCLHSMST is a Cisco GLC-LH-SM compatible fiber transceiver module that has been designed, programmed and tested to work with Cisco® brand switches and routers. It delivers dependable 1GbE (1000 Mbps) connectivity over fiber cable, for 1000BASE-LX/LH compliant networks, with a maximum distance of up to 10 km (6.2 mi). Technical Specifications: Wavelength: 1310 nm Maximum Data Transfer Rate: 1.25 Gbps Type: Single Mode / Multimode Fiber Connection Type: LC Connector Maximum Transfer Distance: 10 km (6.2 mi) - SM / 1 km (0.6 mi) - MM MTBF: 3,092,408 hours Power Consumption: Less than 1 Watt Digital Diagnostics Monitoring (DDM): No This SFP fiber module is hot-swappable, making upgrades and replacements seamless by minimizing network disruptions. StarTech.com SFPs All StarTech.com SFP & SFP+ transceiver modules are backed by a lifetime warranty and free lifetime multilingual technical support. StarTech.com offers a wide variety of SFP modules and direct-attach SFP cables, providing the convenience and reliability you need to ensure dependable network performance.