SFP28 modules send data very fast, up to 25Gbps. They fit in the same small slots as older SFP+ modules. Enter the SFP28 transceiver, the crucial bridge technology delivering cost-effective, high-density 25 Gigabit per second (25G) connectivity. But what is SFP28 exactly, and why has it become a cornerstone of modern network upgrades? This guide dives deep into SFP28 technology, its various types. FS 25G SFP28 optical transceiver solutions offer a wide variety of high-density and low-power connectivity options for 25 Gigabit Ethernet, telecom, and data center. Trusted by 260K+ Enterprise Users. The SFP28 25G SR optical module, a core component of 25G Ethernet, offers high performance, low power consumption, and high port density. The Dell networking SR Optic, SFP28 transceiver prov.