The J4858CST is an HP J4858C compatible fiber transceiver module that has been designed, programmed and tested to work with HP® brand switches and routers. It delivers dependable 1 GbE connectivity over fiber cable, for 1000BASE-SX compliant networks, with a maximum distance of up to 550 m (1804 ft).Technical Specifications: Wavelength: 850 nm Maximum Data Transfer Rate: 1.25 Gbps Type: Multi Mode Fiber Connection Type: LC Connector Maximum Transfer Distance: 550 m (1804 ft) MTBF: 3,381,761 hours Power Consumption: Less than 1.3 Watts Digital Diagnostics Monitoring (DDM): Yes 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. More from the Manufacturer More from the Manufacturer