With the network cable from the Duo to the router installed, and the phone connected to the Duo, power down the duo wait 15 seconds, re-apply power to the Duo, you should get now have a blinking green light on the Duo and get a ring back on the phone shortly. If that does not work...Make sure all your connections are good. Then, with all you components hooked up (including the duo with the phone hooked up to it), power down everything off, reboot modem (wait), restart router (wait), restart Duo (you should get ring back in around 10-15 seconds).