# How to implement serial-to-fiber optic Ethernet with WIZnet W5500? [closed]

I'm using W5500 to implement a serial to Ethernet converter, but I need to transmit over fiber optic cables. I will have a TX cable and a RX cable.

How can this be done since the output of W5500 is differential? Can you suggest a schematic?

Thank you!

• Which part of the process is causing you problems? – Andy aka Feb 27 '17 at 9:13
• That device has a PHY embedded for wired ethernet over twisted pair. How do you assume it even works with fibre? Also, the datasheet does not even mention any IEEE standard once, which leads me to assume it's a terrible choice for anything that has to rely on things being standards-compliant. There should be mentions of IEEE802.3 all over the PDF. – Marcus Müller Feb 27 '17 at 9:31
• So, probably, XY Problem. You've got a problem that you need to solve (connect something to some network), and you picked a way of solving it. Now, your way seems obscure to anyone who's experienced, but since you don't mention what your bigger problem is, it's practically impossible to help you. – Marcus Müller Feb 27 '17 at 9:32

Serial device – "dumb" signal translator – optical cable – "dumb" signal translator – serial-to-Network