pandora114 posted:The comments on the cbc site suggested a "Faraday Cage" Which effectively blocks any and all wireless signals from entering or leaving the building. So, they can effectively still have a wireless router and their own Wifi network going on, but it cannot extend past the Faraday cage. I think all schools should have one. Granted it's an expensive venture but as Prag said, if it aint urgent it can wait.
Faraday cages are legal in Canada.
Nope, nope, nope.
Mobile Phone Jammer
Faraday Cage
The principal is using a jammer, an electronic device that puts out a signal at the same frequency as devices, disrupting them and making them unusable.
A Faraday cage is a metal container that blocks
all electro-magnetic radiation whose wavelengths are longer than the holes of the cage.
Jammers target specific devices. Items that operate on different frequencies, such as radios and televisions, would be unaffected. In an emergency, like a school shooting, the jammer can be turned off. I don't know what the law is in Canada, but jammers are illegal in the U.S. Only the Federal government is allowed to use them and did so during Obama's inauguration.
Farady cages are legal and are frequently used in scientific research and industry. Items within a Faraday cage are still usable but cannot connect wirelessly with devices outside the cage.
You can create a Faraday cage by accident. My house (built in 1938) has interior walls that are plaster on top of mesh screens with cast iron plumbing, metal conduit for electrical wiring and steel frame windows. The WiFi and cordless phones work but people who want to use their cell phones have to go outside.