Officials: Cellphone Jamming Test At Md. Prison A Success

COLUMBIA, S.C. (AP) — Federal officials say they conducted a successful test earlier this year of a jamming technology some hope will help combat the threat posed by inmates with smuggled cellphones.
A report obtained Friday by The Associated Press details the January 17 test of micro-jamming technology at a federal prison in Cumberland, Maryland. Officials say they were able to shut down phone signals inside a prison cell, while phones about 20 feet away worked normally.
Prisons officials