Residents and businesses in Dunwoody are invited to a behind-the-scenes look at the City’s new 9-1-1 communications services provider during a 911 Open House on Wednesday, September 28, 2011. Beginning October 3, the City of Dunwoody will join the cities of Sandy Springs and Johns Creek in their joint 9-1-1 center known as the Chattahoochee River 9-1-1 Authority or ChatComm. This event will give people the opportunity to learn more about ChatComm, the transition, and 9-1-1 communication services.