We have at least 50 phones hooked up. One in particular, Cisco IP Phone 303, boots up fine; however, the three buttons on the right are amber instead of green. The display reads the proper username but if I push one of the buttons it says Failed (480). If I hook up an unassigned phone to that same port/cable the phone has green lights. If I then assign that "new" phone to the user the lights turn amber. It appears to be a user setting and not the phones. Anyone have any ideas?