Florida science teacher suspended for signal-jamming students’ cell phones

[Igel]

4. Here's a link.

http://arstechnica.com/tech-policy/2015/06/florida-science-teacher-suspended-for-signal-jamming-students-cell-phones/


As for where he got it, I assume it was manufactured abroad. I've heard that in other countries places like movie theaters use them. "Japan" is the country that floats to the surface of this bit of mental swamp.

There are also devices used for sniffing out cell phone traffic. Some are directional but using them to find a source can be tricky. You know the single direction, and you really need at least two lines to locate the point of origin for the signal.

There are dedicated wall-mounted systems that feed to a common processor. They can locate the signal while it's being transmitted (and some even intercept). I've seen them advertised for use in places where you don't want cell phones to be used. Say, prisons. (If not for their cost, I'd probably have such a system set up in my classroom. It's all cinderblock and utterly windowless.)