Apple iMac (Early 2008) - Manual (Page 46)

46 Chapter 4 Problem, Meet Solution
If only one IP address is used, then you must have a router capable of sharing the
connection, also known as network address translation (NAT) or “IP masquerading.”
For setup information, check the documentation provided with your router or ask
the person who set up your network. You can use an AirPort Base Station to share one
IP address among multiple computers. For information about using an AirPort Base
Station, check Mac Help or visit the AirPort Support website at
www.apple.com/support/airport.
If you cannot resolve the issue using these steps, contact your ISP or network
administrator.
Problems with AirPort Extreme Wireless Communication
If you have trouble using AirPort Extreme wireless communication:
 Make sure you have properly configured the software according to the instructions
that came with your base station.
 Make sure the computer or network you are trying to connect to is running and has a
wireless access point.
 Make sure you are within antenna range of the other computer or the network’s
access point. Nearby electronic devices or metal structures can interfere with wireless
communication and reduce this range. Repositioning or rotating the computer may
improve reception.
 Check the AirPort signal level. You may see up to four bars in the AirPort status icon
in the menu bar.