The 10057-ST is an Extreme Networks 10057 compatible upstream fiber SFP transceiver which pairs with StarTech.com\'s 10056-ST. They are designed, programmed and tested to work with 1000Base-BX-U compatible Extreme Networks switches and routers. The SFP transceiver module supports a maximum distance of up to 10 km (6.2 mi) and delivers dependable 1 GbE connectivity over fiber cabling. This SFP fiber module is hot-swappable, making upgrades and replacements seamless by minimizing network disruptions. 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.