APCO Project 25 wireless data services for smaller public safety agencies

Digital data messages are very important in modern communication systems and the advanced data technologies that rely on the Internet protocol have opened the door to a wide range of IP-based applications and services. With this trend in mind, we have implemented a system that will allow smaller law enforcement agencies to enable data services in their cruisers in a cost effective way, with a high level of reliability. Towards this goal, we have implemented an inexpensive software defined APCO Project 25 Data Base Station that utilizes the standard IP network interface. This paper describes the overall design of the data base station, its implementation in the preexisting radio network infrastructure, and the testing process. Laboratory tests have produced promising and encouraging results prior to real world deployment.