Summary

Recommendation ITU-T G.8275.1/Y.1369.1 contains the ITU-T precision time protocol (PTP) profile for phase and time distribution with full timing support from the network. It provides the necessary details to utilize IEEE 1588 in a manner consistent with the architecture described in Recommendation ITU‑T G.8275.

Amendment 1 incorporates the following updates:

1���������� Clarifications on some dataset members use in the dataset comparison algorithm;

2���������� Updates to PTSF functionality to include monitoring ports;

3���������� Clarifies the setting of the frequencyTraceable flag;

4���������� Clarifies defaultDS.deviceType;

5���������� Adds performance monitoring Annex F of Recommendation ITU‑T G.8275 as an optional feature of this profile;

6���������� Adds clarification to Annex G and Annex K;

7���������� Revises terminology based on inclusive language;

8���������� Adds new dataset members into Table A.1 and Table A.5;

9���������� Adds new profileVersion 2.6 and 2.7 in clauses A.1 and A.11;

10�������� Added Appendices XVI and XVII.