ATOP SFP+ CWDM for Ethernet 10KM transceiver is designed for use in 10Gigbit, multi-rate links up to 20KM of G.652 single mode fiber. Compatible with SFF-8431, SFF-8432 and supporting 10G LR Ethernet and 10G Fiber Channel protocol, this product is well suited for Fast Ethernet and data centre interconnect applications. Digital diagnostics functions are available via an I2C interface, as specified by SFF-8472.