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How to set up fiber optic on a Xiaomi router

To connect a Xiaomi router to a fiber optic internet line, you need to link the fiber cable to an ONT and then connect the ONT to the router via Ethernet, followed by configuring the router with the correct WAN settings.Step 1: Gather Required Equipment
  • Optical Network Terminal (ONT): Provided by your ISP, converts fiber signals to Ethernet.
  • Xiaomi router: Ensure it supports WAN input and gigabit speeds.
  • Fiber optic cable: Usually single-mode with SC/APC or SC/UPC connectors.
  • Ethernet cable: To connect the ONT to the router.
  • Power adapters: For both ONT and router .
Step 2: Install the ONT
  1. Locate the fiber wall outlet where the ISP's fiber line enters your home.
  2. Connect the fiber optic cable from the wall outlet to the ONT's optical port. Handle the fiber carefully to avoid dirt or damage .
  3. Power on the ONT and wait for the status lights to stabilize (usually 2–5 minutes), .
Step 3: Connect the ONT to the Xiaomi Router
  1. Use an Ethernet cable to connect the ONT's LAN/Ethernet port to the WAN port on your Xiaomi router .
  2. Power on the router and wait for the indicator lights to confirm a successful connection .
Step 4: Configure the Xiaomi Router
  1. Access the router's web interface via a browser (typically 192.168.31.1 for Xiaomi routers).
  2. Navigate to Internet Settings and select WAN Connection Type. For most fiber connections, this is PPPoE.
  3. Enter the PPPoE username and password provided by your ISP. If you did not receive credentials, contact your ISP or check the customer portal .
  4. Save the settings and reboot the router if necessary.
Step 5: Verify the Connection
  • Check the router's status page to ensure it shows an active internet connection.
  • Test connectivity on a device via Wi-Fi or Ethernet.
Tips and Precautions
  • Keep the ONT and router in a dry, ventilated area near power outlets .
  • Avoid bending the fiber cable sharply to prevent damage .
  • Handle fiber connectors by the plastic housing and keep dust caps on until ready to connect .
  • If the connection fails, ensure the ONT is fully booted before powering the router and verify PPPoE credentials . By following these steps, your Xiaomi router should be successfully connected to your fiber optic internet, providing high-speed and low-latency performance.
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