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Los is red light

Level 1a
My LOS is lit red and I can not connect to the internet.
Level 8

An LOS led would normaly indicate low or no fibre optic level, can you take a pic of the rear of the router to show what you've got connected. Check that the fibre cable hasn't been unpluged or kinked. A sharp bend in the fibre will greatly reduce the signal level so check it isn't jammed against the back of a TV/AV cabinet for example.


Hi xinyanwu ,


as @orbistat has advised LOS is Loss of Signal to your modem.

Also PON light is off so it is not detecting the optical network.


What kind of service are you running?