This Recommendation specifies he management requirements and information model for managing a synchronization network and equipment based on the synchronization architecture and equipment defined in the following ITU-T Recommendations:

• [ITU-T G.8264], which specifies the synchronization status message (SSM) transport channel, protocol behaviour and message format;

• [ITU-T G.8271], which defines the one pulse-per-second (1PPS) time and phase synchronization interface specification;

• [ITU-T G.781], which defines the atomic functions for frequency synchronization based on the physical layer;

• [ITU-T G.8265.1], [ITU-T G.8275.1] and [ITU-T G.8275.2], which defines the Telecom Profiles of the Precision Time Protocol (PTP) as defined in [IEEE 1588-2008] and [IEEE 1588-2019].

The management information model will be described using an extension to the model artefacts defined in [ITU-T G.7711]. The extensions enable synchronization networks to be managed using the same patterns found in [ITU-T G.7711].

This amendment updates the Recommendation to align the information model for PTP telecom profile with the data set defined in [IEEE 1588-2019].