The J9151A-BX-U-ST is an HP J9151A compatible upstream fiber SFP+ transceiver which pairs with StarTech.coms J9151A-BX-D-ST. They are designed, programmed and tested to work with 10GBase-BX compatible MSA 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.