NG112 reference

Vonr

Structured NG112 reference page.

112 readiness

Policy, location, routing, and response quality connected in one operational model.

Mobile and IMS

VoNR Emergency Calling

Voice over New Radio

VoNR emergency support is a moving target across devices, networks and roaming environments. It should be discussed as part of 5G emergency readiness, not as a universally available European capability.

5G SA device

NR access

IMS emergency session

Interworking/fallback

PSAP

What it does

VoNR emergency calling addresses emergency sessions in 5G standalone environments using IMS.

VoNR may become a major mobile emergency access path as 5G standalone networks mature.

How it works

The device attempts emergency service over 5G standalone access.
IMS procedures and operator policy determine routing and fallback.
Interworking to LTE or other access may be needed where support is incomplete.

Key interfaces and protocols

3GPP IMS emergency procedures
5G access
SIP/SDP
Mobile location

Systems it interacts with

IMS emergency calling
VoLTE
Emergency roaming
Mobile location
NG eCall

Common failure modes

5G standalone support exists but emergency support is incomplete.
Roaming or interworking behavior is inconsistent.
Fallback loses emergency context.
Testing covers voice but not location.

Implementation considerations

Avoid blanket deployment claims.
Document fallback and interworking assumptions.
Test 5G SA, NSA and LTE transitions separately.

Standards

3GPP TS 23.167
3GPP TS 24.229

Related NG112 technologies

Relationship graph

Mobile chain: IMS Emergency Calling <-> VoLTE Emergency Calling <-> VoNR Emergency Calling <-> Emergency Roaming <-> NG eCall

IMS Emergency Calling VoLTE Emergency Calling Emergency Roaming Mobile Location Resilience

Related country deployments

No country deployments are listed here until independently verified against official or high-confidence sources.

Emergency Roaming

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