The SFP-10G-BXD-I-ST is a Cisco SFP-10G-BXD-I compatible downstream fiber SFP transceiver which pairs with StarTech.com's SFP-10G-BXU-I-ST. They are designed, programmed and tested to work with 10GBase-BX compatible Cisco switches and routers. The SFP+ transceiver module supports a maximum distance of up to 10 km (6.2 mi) and delivers dependable 10 GbE connectivity over fiber cabling. This SFP+ fiber module is hot-swappable, making upgrades and replacements seamless by minimizing network disruptions.