NASHVILLE, Tenn.–The Tennessee Department of Correction Commissioner is calling for the use of cellphone jamming technology to combat what he calls “one of the largest security concerns in prisons today.”

Commissioner Tony Parker cites a report citing the effectiveness of such technology to block illegal cell phone use at jails and prisons. Based on findings from a National Telecommunications and Information Administration pilot program in South Carolina, the technology can jam illegal cell phones in prisons without disrupting legal communication device use.

According to TDOC, illegal cell phones in prisons have been used to promote illegal activity, drug smuggling , facilitate assaults, and even plan escapes. An escape in 2015 facilitated through use of a cell phone led to death of TDOC officer Wayne “Cotton” Morgan.

In his statement, Parker says its time to use the technology to help correctional departments “remove the threats that illegal cell phones bring.”