Check the fibre terminal (ONT) connection - Check the connection between your router and the optical network terminal (ONT), that's the small box attached to the inside wall of your house, make sure both ends are firmly in place. Is it the correct cable?This document describes how to troubleshoot fiber optic interfaces by addressing some of the fiber optic module and cabling specifications. There are no specific requirements for this document. When issues like signal loss, slow speeds, or intermittent connectivity arise, systematic troubleshooting is key. The outages listed here indicate that we've identified an issue and are. Does the 0 Mbit/s Link Status indicate a problem with the fiber optic socket or the modem itself? Could this issue be related to ISP or is it more likely a hardware issue with the modem or fiber optic connection? Should I try any further steps, or is it best to contact Telekom support at this. Why is my router saying disconnected but the internet is working Informational notification. This question is locked and replying has been disabled. Community content may not be verified or up-to-date. Welcome to the Google Fiber help community.