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/Y.1369.

Amendment 2 provides the following updates:

- Changes Annex C to reference Annex B of ITU-T G.8275

- Corrects some settings in Tables V.2 and V.3

- Clarifies the requirements on the T-TSC when it is embedded in the end application

- Adds an example to Appendix XII.