ATOP 10G SFP+ BIDI 40KM module is designed for use in 10Gigbit, multi-rate links up to 40KM of G.652 single mode fiber. Compatible with SFF-8431, SFF-8432 and supporting 10G Ethernet ER and 10G Fiber Channel protocol, this product is well suited for data centre Fast Ethernet and Fiber Channel applications. Digital diagnostics functions are available via an I2C interface, as specified by SFF-8472.