ATOP 20G SFP28-LR is designed for 25 Gigabit Ethernet and Infiniband EDR Applications for use in 28Gb/s links up to 100m with OM4 multi-mode filber (MMF). Compatible with SFF-8431, SFF-8432, it supports Wireless (CPRI), 25G Ethernet SR and 25G Fiber Channel protocol. It has built-in clock and data recovery (CDR). Digital diagnostic functions are available via an I2C, as specified in SFF-8472 and SFF-8402.