25GBASE-SR Multi-Mode 100 m SFP28 Transceiver The DEM-S2801SR is a hot-pluggable 25G SFP28 transceiver for high-speed connections via multimode fiber optic cables. With support for 25GBase-SR, a range of up to 100 meters over OM4 fibres and an LC duplex connection, the module is suitable for use in data centers, corporate networks and high-performance backbone infrastructures.