ATOP 10G SFP+ BIDI series consist of 10G SFP+ BIDI 60KM, 10G SFP+ BIDI 40KM, 10G SFP+ BIDI 20KM, and 10G SFP+ BIDI 10KM, designed for use in 10Gigbit, multi-rate links up to 60KM of G.652 single mode fiber. Compatible with SFF-8431, SFF-8432 and supporting 10G Ethernet and 10G Fiber Channel protocol, these BIDI SFP products are well suited for data center Fast Ethernet and Fiber Channel applications. Digital diagnostics functions are available via an I2C interface, as specified by SFF-8472.