Once you've made sure everything is correctly plugged into the router, next make sure the other end of the Ethernet cable is securely plugged into either the wall jack or the indoor terminal box.
Now check the status light again.
Still not green? Check to see whether any electrical breakers or outlets with circuit breakers in them have been tripped.
If your fiber terminal was installed in your garage or outside your home, it's likely that it plugs into a ground-fault circuit interrupter (GFCI) outlet. These have built-in circuit breakers that can trip when there is an overload or other issue with the electrical current.