re: Att fiber gurus - question

Those pedestals have by far the worst fiber connections we use. The newer ones use screw in opti-tap connectors that are much more durable and protected. The connectors in the terminal like the one in your picture are sometimes low on space if the terminal has a lot of connections. Some of them serve up to 16 customers in neighborhoods where our engineers decided to not use their brains when designing the build out. Unfortunately the fiber can easily be damaged by a tech installing a new line if he is not careful.

What I would try is unplugging the ethernet cord from the modem and then power cycling the ont. Give it a few minutes but if you still see a red alarm light a tech will have to come out.