Apple AirPort Time Capsule 802.11n (4th Generation) - Manual (Page 32)

32 Chapter 3 TipsandTroubleshooting
ItemsThatCanCauseInterferencewithAirPort
The farther away the interference source, the less likely it is to cause a problem.
The following can interfere with AirPort communication:
 Microwave ovens
 Direct Satellite Service (DSS) radio frequency leakage
 The original coaxial cable that came with certain types of satellite dishes. Contact the
device manufacturer and obtain newer cables.
 Certain electrical devices such as power lines, electrical railroad tracks, and power
stations.
 Cordless telephones that operate in the 2.4 or 5 GHz range. If you have problems
with your phone or AirPort communication, change the channel your base station or
Time Capsule uses, or change the channel your phone uses.
 Nearby base stations using adjacent channels. For example, if base station A is set to
channel 1, base station B should be set to channel 6 or 11.