Finisar's FTLX1471D3BCV is a 1G/10G dual-rate SFP+ transceiver is designed for use in 1-Gigabit and 10-Gigabit Ethernet links up to 10km over single mode fiber. They are compliant with SFF-8431, IEEE 802.3-2005 10GBASE-LR/LW and 1000BASE-LX. Digital diagnostics functions are available via a 2-wire serial interface, as specified in SFF-8472. This product is for applications specifically designed for 10G SFP+ ports and 1G/10G SFP+ ports and not native 1G SFP ports. This is a "limiting module", i.e., it employs a limiting receiver. Compliant per RoHS Directive 2011/65/EU See Finisar Application Note AN-2038 for more details.