Phone
Many cordless telephones and baby monitors in the United States and Canada use the 2.4 GHz frequency, the same frequency at which Wi-Fi standards 802.11b, 802.11g and 802.11n operate. This can cause a significant decrease in speed, or sometimes the total blocking of the Wi-Fi signal when a conversation on the phone takes place. There are several ways to avoid this though, some simple, and some more complicated.
- By Using Wired phones which do not transmit.
- Using a cordless phones which do not use the 2.4 GHz band
- Using the 5GHz band
- DECT 6.0 (1.9 GHz), 5.8 GHz or 900 MHz phones, commonly available today, do not use the 2.4 GHz band and thus do not interfere.
- VoIP/Wi-Fi phones share the Wi-Fi base stations and participate in the Wi-Fi contention protocols.
- Several different Wi-Fi channels are available and it is possible to avoid the phone channels.
The last will sometimes not be successful, as numerous cordless phones use a feature called Digital Spread Spectrum. This technology was designed to ward off eavesdroppers, but the phone will change channels at random, leaving no Wi-Fi channel safe from phone interference.
Read more about this topic: Electromagnetic Interference At 2.4 GHz
Famous quotes containing the word phone:
“ET phone home.”
—Melissa Mathison, U.S. screenwriter, and Steven Spielberg. ET, ET The Extra-Terrestrial, realizing he can contact his home planet (1982)
“If I play hard to get, soon the phone stops ringing altogether.”
—Mason Cooley (b. 1927)
“leaving the page of the book carelessly open,
something unsaid, the phone off the hook
and the love, whatever it was, an infection.”
—Anne Sexton (1928–1974)