The SFP28 SR module electrical interface is compliant to SFI electrical specifications.The transmitter input and receiver output impedance is 100 Ohms differential. Datalines are internally AC coupled.
25GE SFP+ 1310nm 40KM Optical Transceiver: SFP+ optical transceivers are designed for use in Fibre Channel links up to 25.78 Gb/s data rate and up to 40 km link length.
25GE SFP+ 1310nm 10KM Optical Transceiver: SFP+ optical transceivers are designed for use in Fibre Channel links up to 25.78 Gb/s data rate and up to 10 km link length.