**My understanding of SFP functionality. **
SFP is an “interface” between 2 parts of a device.
SFP is a transceiver There are input and output, electrical to optical or optical to electrical. SFP includes a laser diode and photodiode.
Optical fibre connects 2 SFP module via LC connector.
If output signal of SFP is electrical, how can it be connected via optical fibre?
