VoNR (Voice over New Radio)

Voice over New Radio is the 5G-native voice service, equivalent to VoLTE but delivered over the 5G NR radio and 5G Standalone core via IMS. VoNR enables HD+ voice codecs, lower call setup times, and full integration with 5G QoS flows. Its security inherits from IMS (SIP over TLS, SRTP, IMS authentication) plus 5G-specific protections such as SUCI on the NAS layer.

Categories: Radio Access NetworkCore NetworkSignaling

VoNR in context

The radio access network is where mobile devices attach to the operator's infrastructure. Attacks in this layer include IMSI catching, rogue base stations and downgrade attacks; defenses rest on mutual authentication, integrity-protected signaling and Open RAN supply-chain hygiene.

The mobile core carries subscriber sessions, mobility and policy. In 4G it is the EPC (MME, HSS, S/PGW); in 5G it is the Service-Based Architecture with AMF, SMF, UPF, AUSF, UDM and the NRF.

To place VoNR in the wider telecom-security picture, review 5G SA, AMF, Base Station (BS), Capacity Planning, CAPEX and CSCF — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

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Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.