VoNR

Technical Explanation

Voice over New Radio (VoNR, also known as Vo5G) is the 5G SA equivalent of VoLTE. Voice packets are encapsulated over 5G NR radio bearers with 5QI=1 (conversational voice) and processed by an IP Multimedia Subsystem (IMS) connected to the 5G UPF. VoNR delivers ultra-fast call setup times (<1.5s), superior EVS (Enhanced Voice Services) HD audio quality, and prevents the device from dropping down to 4G during active voice calls (unlike EPS Fallback), preserving high-speed 5G data sessions during phone calls.

Key Functions

• Pure 5G Standalone voice and conversational video services
• Sub-second call setup and high-definition EVS codec transmission
• Zero interruption to 5G ultra-high-speed data downloads during calls
• SIP/IMS control signaling over dedicated 5QI=5 bearer