Overview#
Legacy E911 infrastructure was designed for a world where emergency calls came from landlines with fixed addresses. Today, a caller reporting a wildfire might be sending a video from their phone, a deaf resident might be texting from a moving vehicle, and a smart building might be triggering an automated fire alarm over IP. The PSAP NG911 / NG112 Integration module connects 911 and 112 centres to that reality.
The module enables PSAPs to transition from legacy E911 systems to IP-based NG911 / NG112 architecture with support for multimedia emergency communications, geospatial routing, and interoperability across jurisdictions. It is designed for emergency communications centres, police and fire dispatch operations, EMS coordination, and multi-agency coordination centres that need to meet NG911 / NG112 migration mandates while maintaining continuity with existing infrastructure during the transition.
Key Features#
i3 Standards Compliance Engine#
- Emergency Call Routing Function (ECRF): Determines the proper PSAP based on caller location using GIS-based routing with polygon boundary definitions
- Multi-jurisdictional overlap resolution
- Time-of-day routing for consolidated centres
SIP/RTP Protocol Stack#
- SIP Registration: Trunk registration with carrier partners supporting up to 500 simultaneous trunks
- Automatic re-registration with exponential backoff
- TLS transport for encrypted signalling
ESInet Connectivity Management#
- Multi-Carrier Integration: Redundant connectivity across three paths
- Primary carrier: Dedicated fibre connection
- Secondary carrier: Alternative fibre path (diverse route)
- Tertiary carrier: Wireless 5G backup for total failure scenarios
Legacy System Interoperability#
- Selective Router Integration: Traditional CAMA/MF interfaces for continuity during transition
- Multi-Frequency (MF) signalling emulation
- Centralized Automatic Message Accounting (CAMA) trunks
- ALI database query via TCP/IP connection
Emergency Call Data Management#
- Voice Recordings: High-fidelity audio capture in Linear PCM, 16-bit, 8 kHz minimum
- Optional wideband recording at 16 kHz for improved call quality
- Dual-channel recording capturing caller and call-taker on separate tracks
Benefits#
- Improved Location Accuracy: 50-metre precision enables faster dispatch and reduces wrong-address responses
- Enhanced Caller Information: Multimedia contact types provide richer situational context for dispatchers
- Accessibility Compliance: Text, video, and relay service support improves access for deaf and hard-of-hearing callers
- Disaster Resilience: Automatic three-path failover prevents service disruption during outages
- Multi-Media Support: Text, images, and video expand communication options beyond voice calls
- Regulatory Compliance: Architecture aligns with NG911 / NG112 migration programmes and multimedia emergency communications requirements
- Future-Ready: IP-based infrastructure supports emerging technologies as they become standardised
Use Cases#
- Emergency dispatch centres migrating from legacy E911 to NG911 / NG112 architecture while maintaining operational continuity
- Multi-agency coordination during complex incidents requiring shared multimedia evidence
- Accessibility-compliant emergency communications for deaf, hard-of-hearing, and speech-impaired callers
- Regional dispatch consolidation requiring unified NG911 / NG112 infrastructure across multiple jurisdictions
- Island and remote emergency services establishing IP-based emergency communications with satellite or 5G connectivity
Integration#
The module connects with carrier ESInet partners via dedicated fibre and 5G backup paths, legacy selective routers through CAMA/MF emulation, ALI databases via TCP/IP, CAD systems for incident creation, and recording infrastructure for dual-channel call capture. Supports NENA i3 standards for NG911 together with NG112-aligned emergency IP interoperability patterns.
Open Standards#
- NENA i3 (NENA-STA-010): The module's Emergency Call Routing Function, ESInet connectivity, and multimedia contact handling are built on the NENA i3 standard for Next Generation 9-1-1 architecture, the normative US reference for IP-based public-safety answering point infrastructure.
- EENA NG112: European emergency IP interoperability follows NG112 specifications from the European Emergency Number Association, aligning call routing, location delivery, and multimedia contact types with EU PSAP migration mandates.
- SIP (RFC 3261) / TLS: All voice and multimedia call signalling uses the IETF Session Initiation Protocol over TLS transport, enabling standards-based trunk registration, re-registration with exponential backoff, and encrypted call establishment across carrier ESInet paths.
- RTP / SRTP (RFC 3550 / RFC 3711): Real-time voice and video media is carried over RTP, with SRTP used for encrypted media streams between the ESInet and call-taking positions.
- PIDF-LO (RFC 4119) / LoST (RFC 5222): Caller location is delivered in Presence Information Data Format, Location Object and routed to the correct PSAP jurisdiction via the Location-to-Service Translation protocol, enabling the 50-metre precision referenced in the location accuracy feature.
- RFC 7852 (Additional Data Related to an Emergency Call): Supplementary caller and device data, including device information and service provider identity, is conveyed using the RFC 7852 additional-data block attached to the SIP INVITE.
- Linear PCM audio (ITU-T G.711 / G.722): Emergency call recordings are captured in Linear PCM at 16-bit 8 kHz (G.711 narrowband) with optional 16 kHz wideband capture (G.722), producing recordings that are compatible with any standards-compliant evidence management or quality-assurance platform.
- OAuth2 / JWT (RFC 6749 / RFC 7519): Operator and system access to the module's GraphQL and REST surfaces is governed by OAuth2 bearer tokens and JSON Web Tokens, consistent with the platform-wide identity model.
Last Reviewed: 2026-01-09 Last Updated: 2026-01-09