The network box does not have fiber optic internet access
Install the latest version of FRITZ!OS because it contains improvements for different fiber optic connections that can resolve the error: Install the latest FRITZ!OS on the FRITZ!Box. The message "Fiber interrupted" is displayed on the "Overview" page of the FRITZ!Box user interface. As fast as 1,000 megabits per second can be reached without too much lag, making it the fastest link speed. The Network Box serves as a router, which provides Internet service for your home networks.
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