Gigaopto 25G CWDM SFP28 transceiver module series is designed for single mode fiber and operates at a nominal wavelength of CWDM wavelength. The modules are suitable for 25G Ethernet and wireless CPRI (option 10) applications. 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.