Description Mellanox SFP28-25GER-31 Compatible is a 25GBASE-ERL SFP28 transceiver reaching 30km over single-mode fiber at 1310nm. It includes duplex LC connectors and DOM monitoring, optimized for Mellanox high-speed low-latency networking hardware. This module provides the extended-reach 25GbE connectivity needed for high-performance computing and data center clusters.