VIAVI Launches Cesium-free ePRTC360+ Clock with <100ns Drift Over 14 Days
VIAVI Solutions launched its patent-pending Cesium-less ePRTC360+ holdover clock, meeting ITU-T G.8272.1 requirements with under 30 ns short-term drift and below 100 ns over 14 days. Priced significantly lower than Cesium clocks and tested in live GNSS jamming environments, it supports edge deployment and enhances network timing resilience.
1. Product Launch and Standard Compliance
VIAVI launched the patent-pending ePRTC360+ holdover clock, the first Cesium-free solution meeting ITU-T G.8272.1 requirements with under 30 ns short-term drift and below 100 ns over 14 days. The device safeguards critical power grids, 5G networks, AI data centers, transportation and public safety systems against GNSS timing disruptions.
2. Technical Specifications and Testing
The ePRTC360+ integrates a Rubidium holdover oscillator with VIAVI’s SecureTime GEO anti-jamming and enhanced GNSS anti-spoofing antennas, leveraging encrypted, directional L-band altGNSS GEO-L signals for continuous timing. Live-sky defense and commercial tests confirmed 100 ns accuracy during GNSS-denied scenarios, and it is compatible with VIAVI’s SecurePNT 6200 series.
3. Cost Efficiency and Deployment Advantages
Priced significantly lower than traditional Cesium clocks and free of delicate startup or licensing constraints, the ePRTC360+ enables cost-effective deployment at network edge sites previously out of reach. Rapid integration into existing grandmaster systems and elimination of Cesium tube replacements reduce total cost of ownership and boost sync network robustness.
4. Demonstration and Market Outlook
VIAVI will showcase the ePRTC360+ at Mobile World Congress Barcelona 2026, highlighting edge deployment cases and resilience features. Broad adoption across telecommunications, defense, and critical infrastructure sectors could drive strong aftermarket demand and contribute to VIAVI’s revenue growth.