ATOP 25G SFP28-BIDI is designed for use in 28Gb/s links up to 10Km of G.652 single mode fiber. Compatible with SFF-8431, SFF-8432 and supporting Wireless (CPRI/eCPRI), 25G Ethernet LR protocol, this module operates at a wavelength of 1270 / 1330nm. It has built-in clock and data recovery (CDR). Digital diagnostics functions are available via an I2C interface, as specified by SFF-8472 and SFF-8402.