NG112 reference
Emergency Roaming
Structured NG112 reference page.
112 readiness
Policy, location, routing, and response quality connected in one operational model.
Mobile and IMS
Emergency Roaming
Roaming brings together visited-network radio access, home-network subscriber context, emergency service identity, location delivery and cross-border operational expectations. The user expectation is simple: 112 should work. The engineering reality is not simple.
What it does
Emergency roaming covers how callers expect 112 to work when they are outside their home network or country.
Roaming emergency support is essential for travelers and border regions across Europe.
How it works
- The visited network must recognize and support emergency access.
- Location should describe where the caller actually is, not where their home account lives.
- Routing must deliver the call to the emergency service responsible for the visited location.
Key interfaces and protocols
- 3GPP roaming/emergency procedures
- Mobile location
- Emergency service URNs/dial strings
- Inter-operator arrangements
Systems it interacts with
- IMS emergency calling
- VoLTE
- VoNR
- Wi-Fi calling
- Mobile location
- PEMEA
Common failure modes
- Home and visited network assumptions conflict.
- Emergency access works but location is delayed.
- Border-area routing goes to the wrong jurisdiction.
- Device support differs from network support.
Implementation considerations
- Test roaming explicitly rather than relying on domestic test results.
- Include border communities and tourist corridors.
- Document fallback behavior for unsupported devices.
Standards
- 3GPP TS 23.167
- European 112 policy
Related NG112 technologies
Relationship graph
Mobile chain: IMS Emergency Calling <-> VoLTE Emergency Calling <-> VoNR Emergency Calling <-> Emergency Roaming <-> NG eCall
Related country deployments
No country deployments are listed here until independently verified against official or high-confidence sources.
Related articles
Sources
- 3GPP TS 23.167: IMS emergency sessions - 3GPP, accessed 2026-08-31
- 3GPP TS 24.229: IMS call control protocol based on SIP and SDP - 3GPP, accessed 2026-08-31
- 112: the European emergency number - European Commission, accessed 2026-08-31
- Directive (EU) 2018/1972 establishing the European Electronic Communications Code - European Union, accessed 2026-08-31
- Next Generation 112 and the new Emergency Services Networks Landscape - EENA, accessed 2026-08-31
Last verified: 2026-08-31