Electrical – SFP breakout to another SFP


Hey all I am just wondering before I do this if its possible to connect 2 SFP sockets to each other in order to bring in the fiber connection and then take it back out the same way?
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So in the image above, Pin 1 would hook up to Pin 1 on the second SFP socket. Pin 2 would hook up to Pin 2 on the second SFP socket, etc etc…

I'm doing this so that I can bring in the SFP connection into a server case and then once inside the server case I need to hook it up to a motherboard inside there that has the SFP connection.

To better illustrate what I am trying to accomplish:
enter image description here

this is what the ONT fiber hook up looks like that I am wanting to use (green connector).
enter image description here

Best Answer

I would expect that this isn't possible due to the I2C configuration interface and other system status/control signals defined on the connector. You would also need the appropriate power supplies on the board for the modules, so it couldn't be a passive adapter or passthrough board. To coordinate the TX/RX high-speed differential pairs, you would also need to swap pins and likely include DC blocking capacitors on those lines.

What pre-SFP interface are you planning on using? If you are using a consistent optical interface, you could look into short fiber jumpers that have a socket for exposing to the user and use just one (rather than three) SFP on the internal board.