DETROIT MI EMERGENCY RESPONSE SYSTEM FAILS Detroit, Michigan is the latest city to receive national news media attention for the failure of its P25 digital trunked radio system. The system failed during the 4th of July holiday weekend creating what was described as havoc for first responders. The radio system is for communication between 911 dispatchers and Detroit's police, fire and Emergency Management Service crews.It failed at around 5:30 a.m. Friday morning, July 5th causing a backlog of hundreds of calls. Michigan State Police stepped in to allow Detroit's emergency system to use the state's communication system. This backup was used for several days while crews worked to restore the Detroit system. Detroit Police Spokeswoman Sergeant Eren Stephens said that during the initial down time there had been some 60 priority one and more than 170 non-emergency calls that had backed up because of the issue. Like most new digital systems, Detroit's is dependant on centralized computer control. This means failure of the central processing system can bring the entire system to a halt.And while Detroit does have a mirrored back-up system in place it apparently had ever been fully tested and it also failed leading to state to step in.More is on-line at tinyurl.com/detroit-radio-down.