Apple AirPort Extreme 802.11n (1st Generation) - Manual (Page 8)

8 Chapter 1 Getting Started
Once you have connected the cables for all the devices you plan to use, connect the
AC plug adapter, and plug AirPort Extreme into the wall. There is no “on” switch.
Important: Use only the AC adapter that came with your AirPort Extreme.
When you plug AirPort Extreme into the wall, the status light flashes green for one
second, and then glows amber while it starts up. Once it has started up completely, the
status light flashes amber. The status light glows solid green once it is set up and
connected to the Internet or a network.
When you connect Ethernet cables to the Ethernet LAN ports (G ), the lights above the
ports glow solid.
Power port Ethernet activity light
AC adapter