ATOP 25G SFP28-LWDM (LAN-WDM) uses 12 wavelengths covering 1269.23nm～1318.35nm of O-band with a transmission data rate of 28Gbps, supporting link distance up to 40km of G.652 single-mode fiber. Compatible with SFF-8431, SFF-8432 and supporting Wireless (CPRI/eCPRI) and 25G Ethernet, this transceiver is ideally suited for 5G fronthaul applications. Digital diagnostics functions are available via an I2C interface, as specified by SFF-8472 and SFF-8402.