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Router with fiber optic cable working fine but unable to connect to the internet

Router with fiber optic cable working fine but unable to connect to the internet

A router connected to a fiber optic cable may have no internet due to physical cable issues, device misconfiguration, or service interruptions.Check Physical ConnectionsEnsure that the fiber optic cable is properly connected to the Optical Network Terminal (ONT) or modem and that the router's WAN/Internet port is securely connected. Inspect the fiber cable for visible damage, sharp bends, or loose connectors, and clean connectors with lint-free wipes and isopropyl alcohol if necessary . Damaged or contaminated cables can prevent signal transmission.Verify Device StatusCheck the LEDs on your ONT or modem. The Power LED should be on, the PON light should be active, and the Alarm LED should not be red. If the Data LED is off, the issue may be between the ONT and the router . Restart both the ONT and the router to clear temporary glitches .Check Router ConfigurationLog in to your router's management page and verify the Internet IP address. If it shows 0.0.0.0, the router is not receiving a valid IP from the ONT, indicating a possible modem or physical connection problem . You may need to:Clone your computer's MAC address to the routerSet a static IP or DNS serverEnsure the router firmware is up to date Test with Wired ConnectionConnect a computer directly to the ONT using an Ethernet cable. If the internet works, the problem is likely with the router. If it still does not work, the issue may be with the fiber service or ONT .Consider External FactorsCheck for service outages in your area using your ISP's website or mobile app. Environmental factors, such as moisture or temperature extremes, can also affect fiber performance .Advanced TroubleshootingIf the above steps fail:Swap transceivers or cables with known-good unitsUse an OTDR or power meter to test signal strengthContact your ISP or router manufacturer for technical support By systematically checking physical connections, device status, router configuration, and service availability, you can identify the root cause and restore internet connectivity.

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I''m currently in the process of making an ethernet cable that doesn''t have the power carrying pair connected, so that we can test if the POE injector is somehow pushing power to the

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