Duluth, MN (NNCNOW.com) --- The City of Duluth, over the next few months, will be making upgrades to the radios and radio channel the “All Hazard Siren” operates through. The Federal Communications Commission (FCC) is mandating changes be made to the communication systems across the United States. City officials say they decided to wait until winter to do the upgrade to reduce the impact of the system being down. The plan calls for half of the sirens to be taken offline for 3 weeks, once upgraded and placed back in service. It is expected the system will be fully functioning by February 2013. During these upgrades, half the sirens will always be working. In case of an emergency all sirens can be set off manually at the pole if needed. The usual testing on the first Wednesday of the month will not occur during the months of December, January and potentially February of 2013. Posted to the web by Krista Burns