What is the function of the Legacy Network Gateway (LNG) in NG911?

• A. A gateway interconnecting legacy wireline/wireless networks to NG911
• B. A satellite backup system
• C. A data storage facility
• D. A firewall for internal networks

Answer: (A)

The Legacy Network Gateway is the bridge between old-style 9-1-1 networks and the IP-based NG911 system. Its job is to interconnect legacy wireline and wireless networks with NG911 so that calls and accompanying data can travel smoothly into the NG911 environment and reach the appropriate PSAP. It handles the signaling and protocol translation needed when a legacy network (which may use different signaling methods) talks to the NG911 components, ensuring caller information like location and ANI/ALI data can be delivered where it’s needed. It’s not a satellite backup system, a data storage facility, or a firewall; its purpose is interworking between legacy networks and NG911.