9-1-1 in Connecticut
Basic 9-1-1 Service
"9-1-1" has been available as the telephone number to dial to request emergency assistance in Connecticut since the 1970's. The first 9-1-1 service available was called Basic 9-1-1 service and it delivered 9-1-1 calls to a local police department, fire department or regional dispatch center based on the originating telephone exchange without the benefit of any location information. Technical limitations inherent in Basic 9-1-1 service made it impossible, at that time, to provide 9-1-1 service to everyone in the State.
Enhanced 9-1-1 Service
In 1984 legislation was passed mandating that Enhanced 9-1-1 service, commonly known as "E9-1-1", be implemented statewide by the end of 1989. E9-1-1 service made 9-1-1 the only number to call for emergency assistance anywhere in the state from any type of telephone device (traditional wireline, wireless and voice over IP (VoIP) telephones). E9-1-1 service delivered 9-1-1 calls to public safety answering points (PSAPs) via an SS7/ISDN network, and provided automatic location information (ALI) with a display of the name, address and telephone number of the orignating telephone on a screen at the PSAP.
Next Generation 9-1-1 Service
The next phase in the evolution of 9-1-1 in Connecticut is Next-Generation 9-1-1 (NG911). The new system utilizes the West Safety Services' "VIPER NG911" platform for the PSAP equipment. The deployment of the VIPER NG911 system to our PSAPs began in January of 2017 and was completed in November of 2017. NG911 is Internet Protocol (IP) based, utilzes the State of Connecticut Public System Data Network (PSDN) for call delivery, and employs state of the art software and hardware at the PSAPs. It provides the infrastructure to allow text to 9-1-1, and the future ability to send images/video with a 9-1-1 call when telecommunication service carriers make these features available to the public.