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Work item:
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G.8275
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Subject/title:
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Common aspects of PTP profiles for phase/time synchronization
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Status:
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Consented on 2025-10-24
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Approval process:
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AAP
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Type of work item:
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Recommendation
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Version:
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Rev.
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Equivalent number:
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-
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Timing:
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2025-10 (Medium priority)
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Liaison:
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-
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Supporting members:
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-
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Summary:
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Recommendation ITU-T G.8275 specifies common aspects of phase and time profiles defined in [ITU-T G.8275.1] and [ITU-T G.8275.2]. This recommendation includes the precision time protocol (PTP) functions per [IEEE 1588] that are necessary to ensure interoperability for the delivery of accurate phase/time synchronization.
This new revision incorporates the following updates:
Split the contents of the previous revision of [ITU-T G.8275] into this new revision which addresses the common aspects of PTP profiles, and the recommendation [ITU-T G.8274] which addresses the PTP architecture aspects;
Revise the title of this recommendation as “Common aspects of PTP profiles for phase/time synchronization”, and rewrite the summary and scope;
Rewrite the summary, scope and clause 6;
Move the contents of clauses 7 and 9 of the previous revision of [ITU-T G.8275] into the recommendation [ITU-T G.8274];
Move the contents of Annex A, Appendix I, Appendix II, Appendix V, Appendix VII and Appendix X into the recommendation [ITU-T G.8274], and add a reference to the recommendation [ITU-T G.8274] for these annex and appendixes;
Improve some contents of Annex F;
Add a new Annex G “Synchronization service availability performance metrics (optional)”;
Add a new deployment case about IWF into Appendix III;
Add a new Appendix XIV “Calculation of offsetScaledLogVariance for T GM timed by PRTC or ePRTC”;
Add a new Appendix XV “Considerations of deploying ePRTC and PRTC in the network”;
Add a new Appendix XVI “Considerations on timer reconfiguration”.
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Comment:
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-
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Reference(s):
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Historic references:
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Contact(s):
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First registration in the WP:
2025-05-21 10:56:48
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Last update:
2025-11-20 14:54:52
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