25GBASE-ER SFP28 Module SMF 40km FECCompatible with Cisco switches. Description 25GBASE ER SFP28 Module SMF 40km FEC This Product is programmed to be fully compatible and functional with all intended Cisco switching devices. This SFP module is based on the 25G Ethernet IEEE 802. 3by standard and is designed to be compliant with the SFP Multi source Agreement (MSA). This module is designed for Single mode fiber and operates at a nominal wavelength of 1310nm. Features Features Supports up