"The Wisconsin State Patrol, which oversees traffic incidents, statewide voice communications and mobile communications networks, has devoted several years to developing a strategy for adopting the Project 25 radio interoperability standards. Project 25 refers to a suite of standards for digital, two-way wireless communications products. A committee of manufacturers, public safety agencies, and state and federal communications professionals launched Project 25 in 1989 to provide detailed standards for interoperable radios."
National Criminal Justice Reference Service: http://www.ncjrs.gov/index.html
IN Short: Toward Criminal Justice Solutions (April 2010)