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)
“You hear that, Vitus? The phone is dead. Even the phone is dead.”
—Peter Ruric, and Edgar G. Ulmer. Edgar G. Ulmer. Hjalmar Poelzig (Boris Karloff)
“I went into the kitchen and got halfway to the phone before I realized that I couldn’t call her.... A lot of people who lost a mother or father or husband or wife will tell you that they find themselves almost talking out loud. I do that a lot.”
—Bill Clinton (b. 1946)