Ethernet ports use LEDs to communicate link and activity status: Solid Green (Link) – Connection established and stable. Amber / Orange (Solid or Blinking) – Indicates slower speed, configuration mismatch, or minor network. The Optical Network Terminal (ONT) is a crucial device in modern telecommunications, serving as the interface between your home network and the fiber-optic internet connection provided by your Internet Service Provider (ISP). For more help topics, please visit the main Support Page. If you are a Freeola Full Fibre Broadband customer you will have an Openreach modem. The switch consists of multiple LEDs to monitor switch activity and performance. You can also monitor the status of the fan tray assembly and the power supplies. A black/grey Cityfibre ONT in working order. IMPORANT: If you have an issue.