Cell phone jammers have to be sophisticated enough to squelch phone signals without interfering with other devices, from garage door openers to medical equipment.

SPOKANE, Wash. - Just days after testing a cell phone jammer designed to block students from calling and texting during class, a Spokane area school has scrapped the program. Administrators ...

The device includes a transmitter that mimics a cell phone base station and a metal horn to concentrate the signal from a 10 milliwatt power source in a single direction. Scanning… a concealed ...

Jamming machines block cell phone signals, but the technology is banned in state prisons thanks to the Federal Communications Act of 1934 which passed long before cell phones were invented.

HOUSTON A Houston company is in trouble for messing with worker s cell phones. The FCC gave R&N Manufacturing a $29,000 fine for using a signal jammer in its warehouse.

Laws against cell phone jammers in the U.S. apply to everyone except federal government officials. Which raises the question: Is that right?

When someone inside makes a phone call, the closest cell tower will pick up that signal. In a prison with a managed access system in place, the tower is usually located within the perimeter.

The Canadian government will kick off a 90-day public comment period this Saturday on whether to license technology aimed at preventing the inappropriate use of cell phones in places such as ...

The jarring polychromatic din of ringing cell phones is increasingly being thwarted by devices initially developed to help security forces avert eavesdropping and thwart phone-triggered bombings.

I fully do agree that prisoners shouldn't have access to cell phones but there are much better and LEGAL alternatives. Let's analyze the problem at hand: Prisoners having access to cell phones.