The managed access system renders unauthorized devices useless within the prison; it relieves the administration of having to locate or confiscate the devices. It permits authorized devices to operate unimpeded. The technology avoids the legal impediments associated with competing technologies for cell detection and cell-jamming. It ensures that all emergency 911 calls are permitted to complete. Christopher Epps, Commissioner of MDOC, announced the system on September 8, 2010, and suggested that it provided a model for other prisons to use to reduce contraband cell phones. Due to the installation of the system, between August 6, 2010 and September 9, 2010, more than 216,320 texts and calls were blocked.