You activate the subscription to Ljósleiðarinn (e. fiber connection) by clicking on the link we sent you via e-mail and SMS, and follow the instructions in the document that comes with your router.
For the Huawei HG-659 fiber optic router, follow these instructions.
For the Huawei DG8245W2 fiber optic router, follow these instructions.
The LAN cable connects to the yellow LAN 1 port on the fiber optic box. Then connect the other end of the cable to the blue WAN port on the back of the router.