Summary

Recommendation ITU-T G.8275.2/Y.1369.2 contains the ITU-T precision time protocol (PTP) profile for phase/time distribution with partial timing support from the network (unicast mode). 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. This Recommendation defines the PTP profile for unicast mode only. Future editions of this Recommendation may contain a separate profile for a mixed unicast/multicast case.

Amendment 2 provides the following updates:

–           Adds new acronym to clause 4: T-BC-A

–           Adds and replaced text in clause 5 related to addition of T-BC-A

–           Adds and replaced text in clause 6.2.3 related to T-BC-A addition and reference to "local time reference", including changes to Table 1

–           Changed text in clause 6.6

–           Adds references to T-BC-A in clauses 6.7.1 and 6.7.4

–           Adds T-BC-A reference and "local time reference" to clauses 6.7.6 and 6.7.7

–           New material and edits to clause 6.8 including T-BC-A references

–           Adds references to T-BC-A in Appendix I and Appendix III

–           Adds "local time reference" to Appendix II

–           Adds and replaced material in Appendix IV

–           Adds new material added to Appendix V related to PTSF

–           Adds new Appendix VIII on PTSF-lossSync.