ATOP 25G SFP28-DWDM 10km Transceiver is a multi-purpose module designed for 25G Ethernet (28Gbps data rate) and CPRI/eCPRI links reach up to 10km over single-mode fiber (SMF). Designed for data center core networks and enterprise campus networks, it features a high-performance cooled DWDM EML transmitter and high sensitivity APD receiver. Digital diagnostics functions are available via an I2C interface, as specified by SFF-8472 and SFF-8402. It has built-in clock and data recovery (CDR).