Which statement about the Legacy Network Gateway (LNG) is true?

Which statement about the Legacy Network Gateway (LNG) is true?

• A. A modern IP-based PSAP with no legacy components
• B. A signaling and media interconnection point between legacy networks and NG911
• C. A data storage facility
• D. A regulatory body overseeing emergency communications

Answer: (B)

The main idea is interoperability between legacy 911 networks and Next Generation 911 networks. The Legacy Network Gateway provides the bridge that connects traditional, circuit-switched or SS7-based emergency networks to the IP-based NG911 world. It handles signaling interworking (converting legacy call setup and control to SIP/NG911 signaling) and manages media interconnection (so the voice path can flow between old trunks and modern IP networks). This enables calls originating on legacy systems to reach NG911 services and for NG911 to reach legacy endpoints, without requiring a complete overhaul of the older infrastructure. It is not a modern IP-based PSAP, nor a data storage facility, nor a regulatory body.

The main idea is interoperability between legacy 911 networks and Next Generation 911 networks. The Legacy Network Gateway provides the bridge that connects traditional, circuit-switched or SS7-based emergency networks to the IP-based NG911 world. It handles signaling interworking (converting legacy call setup and control to SIP/NG911 signaling) and manages media interconnection (so the voice path can flow between old trunks and modern IP networks). This enables calls originating on legacy systems to reach NG911 services and for NG911 to reach legacy endpoints, without requiring a complete overhaul of the older infrastructure. It is not a modern IP-based PSAP, nor a data storage facility, nor a regulatory body.