GIGALIGHT 25G SFP28 eSR optical transceiver modules are used for short-distance interconnections between equipment within data centers or for 5G pre-transmission, and are compliant with the IEEE 802.3by 25GBASE-SR Ethernet transport protocol, with an optional dual-rate version compatible with CPRI Option 10 and 25GE. The series is an enhanced version of the 25G SFP28 SR, which uses a pair of multimode fibers for transmission with a central wavelength of 850nm over distances of up to 200m (OM3) or 300m (OM4), with an optional industrial-grade operating temperature range.