Apple AirPort Extreme 802.11n (5th Generation) - Manual (Page 10)

10 Chapter 1 GettingStarted
Plugging In AirPort Extreme
Before you plug in your AirPort Extreme, first connect the appropriate cables to the
ports you want to use:
 Connect the Ethernet cable that is connected to your DSL or cable modem (if you will
connect to the Internet) to the Ethernet (WAN) port (<).
 Connect a USB cable connected from the USB port (d) on the AirPort Extreme to
a compatible USB printer (if you will print to a USB printer), a hard disk, or a hub.
 Connect an Ethernet cable from any Ethernet device to the Ethernet LAN ports (G).
After you have connected the cables for all the devices you plan to use, connect the
AC adapter to the power port, and plug your AirPort Extreme into a power outlet. There
is no power switch.
Power port Ethernet activity light
AC adapter