---
title: "How to implement serial-to-fiber optic Ethernet with WIZnet W5500?"
url: "https://maker.wiznet.io/forum/12178"
markdown_url: "https://maker.wiznet.io/forum/12178/md"
type: "Forum topic"
category: "Ethernet Chips"
author: "CristianM"
created: "2017-02-27T09:01:52+09:00"
last_activity: "2017-05-04T08:39:53+09:00"
language: "en"
views: 1060
replies: 1
source: "WIZnet Makers forum (https://maker.wiznet.io/forum/)"
---

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

## Question

Asked by CristianM on 2017-02-27 in Ethernet Chips.

Hello! 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!

## Replies

### Reply 1 by Kei, 2017-02-28

I answered your other article.
Please refer to the link below.

[url][Ethernet controller with UART input? - #2 by Kei](https://forum.wiznet.io/t/ethernet-controller-with-uart-input/2915/2)]

Thank you.

---

Source: https://maker.wiznet.io/forum/12178