Recommendation ITU‑T G.8274 describes the architecture and requirements for packet-based time and phase distribution in telecom networks. The architecture described is mainly applicable to the use of [IEEE 1588]. Details necessary to utilize [IEEE 1588] in a manner consistent with the architecture are defined in other Recommendations.This Recommendation describes the architecture and requirements for packet-based time and phase distribution in telecom networks. The architecture described is mainly applicable to the use of IEEE 1588. Details necessary to utilize IEEE 1588 in a manner consistent with the architecture are defined in other Recommendations. This Recommendation will address the following items: New G.8274 will take the current title, scope, and introduction from G.8275 Current G.8275 architecture content moved to G.8274 New material applicable packet-based time and phase architecture as per current G.8275 living list