ATOP 25G SFP28 CWDM 20KM transceiver is designed for use in 28Gb/s links up to 20KM of G.652 single mode fiber. Compatible with SFF-8431, SFF-8432 and supporting Wireless (CPRI/eCPRI), 25G Ethernet and 25G Fiber Channel protocol, this transceiver is suitable for many telecom and datacom applications including 5G/4G wireless, Fast Ethernet, and Fiber Chanel. Digital diagnostics functions are available via an I2C interface, as specified by SFF-8472 and SFF-8402.