An Emergency Services IP Network (ESInet) is a managed, private IP network built for 911. It replaces legacy analog trunks and selective routers, and carries voice, text, video and data between carriers and 911 centers. NEXiSCore provides the ESInet and the core services that run on it.

What are Next Generation Core Services (NGCS)?

NGCS are the software functions defined in the NENA i3 standard that route and secure NG911 calls. They include the Emergency Services Routing Proxy (ESRP), Emergency Call Routing Function (ECRF), Location Validation Function (LVF) and Border Control Function (BCF). NEXiSCore delivers all of them as one platform.

Is NEXiSCore compliant with the NENA i3 standard?

Yes. NEXiSCore is built on the NENA i3 architecture, so it interoperates with i3-capable call handling systems, neighboring ESInets and originating service providers.

How does NEXiSCore route a 911 call to the right PSAP?

NEXiSCore checks the caller's location against authoritative GIS data, asks the ECRF which PSAP serves that location, and applies your routing policies. The call is then delivered with its location and caller data attached. If the primary PSAP is unavailable, the call reroutes to a designated backup.

Can NEXiSCore work with our existing call handling equipment?

Yes. NEXiSCore connects to i3-capable call handling systems, including NGA's NEXiSConnect, and can support legacy PSAP equipment during the transition to NG911.

NEXiSCore

ESInet and NG911 Core Services for 911 Authorities

NEXiSCore is the i3-compliant ESInet and Next Generation Core Services (NGCS) layer that carries 911 voice, text and data from every carrier to the right PSAP, with validated location and full redundancy.

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FAQ

Purpose-Built for Next Generation 911 Networks

What NEXiSCore Does

NEXiSCore connects Originating Service Providers (OSPs) to Public Safety Answering Points (PSAPs) over a secure, IP-based Emergency Services IP Network (ESInet). It runs the NENA i3 core services that decide where each 911 call goes, check the caller's location, and apply your routing policies, so every call and text reaches the correct 911 center without delay.

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Core Capabilities

Secure Emergency Call Routing

SIP-based i3 call routing through the ESRP and ECRF, so each 911 call reaches the right PSAP the first time.

Carrier-Grade Reliability

Redundant, geo-diverse network paths and trunks built for voice, text and video, with no single point of failure.

Advanced Location Validation

Location Validation Function (LVF) and GIS-based routing that confirm caller location before the call is delivered.

Policy-Based Resilience

Configurable routing policies that reroute calls automatically during outages, overflow or planned maintenance.

Full Interoperability

Standards-based i3 interfaces that connect carriers, neighboring ESInets and any i3-capable call handling system.

Identity & Security

Border Control Function (BCF) protection, encrypted transport and strict access controls that keep the ESInet safe from spoofing, TDoS and intrusion.

How NEXiSCore Powers NG911

NEXiSCore sits between the carriers and the 911 center. When a call or text enters the network, NEXiSCore validates the location, queries the ECRF for the correct PSAP, applies your routing policies through the ESRP, and delivers the call with its location and caller data attached. If a PSAP is down or overloaded, policy routing sends the call to a backup center automatically.

See It In Action

Designed for Every Emergency Input

NEXiSCore routes 911 interactions that start from:

Wireless and landline phones
VoIP and IP-based communications
Text-to-911 and Real-Time Text (RTT)
Connected vehicles, smart-city sensors and IoT devices

Built for State, Regional and Local 911 Authorities

State 911 Boards and Commissions

Regional 911 Districts

County and City 911 Centers

Public Safety Answering Points (PSAPs)

Emergency Communications Districts

FAQ

NG911 Insights, Research and Best Practices

White papers, case studies and guides on NG911 modernization, ESInets, cloud infrastructure and public safety innovation. See how 911 authorities are planning, deploying and scaling next generation 911.

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Logan County

Case study

NG911 ESInet NG911 + Call Handling

Logan County: Delivering End-to-End NG911 for West Virginia

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