Summary

Recommendation ITU-T G.8275.2 specifies a profile for telecommunication applications based on precision time protocol (PTP) per [IEEE 1588]. This profile specifies the PTP functions that are necessary to ensure network element interoperability for the delivery of accurate phase/time (and frequency) synchronization. The profile is based on the use of partial timing support (PTS) or assisted partial timing support (APTS) from the network architecture as described in [ITU-T G.8274] and definitions described in [ITU‑T G.8260]. Common aspects of PTP profiles for phase/time synchronization are specified in [ITU‑T G.8275].

Revision incorporates the following updates:

· Updated references and abbreviations

· Updated clause 6.7.6 and clause 6.7.7, and added corresponding data set members in Table A.1

· Added description on PTSF for a virtual PTP port in clause 6.7.11

· Added portDS.wtrRemainingTime in clause 6.7.12 and in Table A.5

· Aligned the descriptions of clause 6.8 to G.8275.1, and added corresponding data set members in Table A.1

· Added defaultDS.timeSinceCurrentClockMode in clause 6.10 and in Table A.1

· Updated clause 8 and clause A.8

· Added a new annex, Annex G

· Renumbering the table numbers