Cordless Phones
Cordless phones use several wireless technologies to connect remote handsets to a central base station. Phones that are advertised to use the 2.4- and 5.8-GHz bands do just that—and can cause significant interference with nearby WLANs. Cordless phones can use one channel at a time, but can also change channels dynamically. As well, transmit power levels can rise up to 250 mW, overpowering an AP at maximum power.
The Digital Enhanced Cordless Telecommunications (DECT) standard was developed by ETSI and uses the upper portion of the 1.8 GHz band in Europe, Asia, Australia, and South America. In the United States, cordless phones are based on DECT 6.0, which uses the 1.9-GHz band.
Because DECT and DECT 6.0 phones do not use the 2.4-GHz ...
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