How to reconnect a disconnected fiber optic cable to a router

Reconnect a fiber optic cable by carefully connecting it to the Optical Network Terminal (ONT) and then linking the ONT to your router via Ethernet.

Step 1: Prepare Your Equipment

Ensure you have the following:

• Fiber optic cable with SC/APC or SC/UPC connectors.
• Optical Network Terminal (ONT) provided by your ISP.
• Router with a WAN or Internet port.
• Ethernet cable to connect the ONT to the router.
• Optional: dust caps to protect fiber ends and safety gloves to handle the cable safely .

Step 2: Handle the Fiber Cable Safely

• Inspect the fiber ends for dirt or damage; clean if necessary.
• Remove protective dust caps from both the fiber cable and the ONT port.
• Hold the connector by its plastic housing; avoid touching the glass tip .

Step 3: Connect the Fiber to the ONT

• Align the fiber connector with the ONT's optical port using the key or tab.
• Push the connector in gently until it clicks securely.
• Ensure the connection is snug but do not force it, as fiber is delicate .

Step 4: Connect the ONT to the Router

• Use an Ethernet cable to link the ONT's LAN/Ethernet port to the router's WAN/Internet port.
• Make sure the router is powered off during initial connection to avoid signal issues .

Step 5: Power On and Verify

• Plug in and power on the ONT first; wait 2–5 minutes for the status lights to stabilize.
• Power on the router and check its indicator lights to confirm a successful connection.
• A solid green light on the ONT usually indicates proper power and signal reception .

Step 6: Test the Connection

• Use a computer or mobile device to verify internet access.
• Optionally, use network testing tools like a visual fault locator or OTDR to check signal integrity if issues persist .

Additional Tips

• Keep the ONT and router in a dry, ventilated area near a power outlet.
• Avoid bending the fiber cable sharply; maintain the minimum bend radius.
• Secure excess cable with velcro straps to prevent tension or damage . Following these steps ensures a safe and reliable reconnection of your fiber optic cable to your router, restoring your internet service efficiently.