AAP Recommendation

G.8272: Timing characteristics of primary reference time clocks

Study Group
15

Study Period
2025-2028

Consent Date
2025-03-28

Approval Date

Provisional Name


Input used for Consent
SG15-TD72-R1/PLEN (2025-03)
SG15-TD93/PLEN (2025-03) (A.5 TD)

Status
LJ

IPR
Site

Recommendation ITU-T G.8272 specifies the requirements for primary reference time clocks (PRTCs) suitable for time, phase and frequency synchronization in packet networks. It defines the error allowed at the time output of the PRTC. These requirements apply under the normal environmental conditions specified for the equipment. This Revision to Recommendation ITU-T G.8272 (2018/11) provides the following updates: Changed “time standard” to “time scale” and clarified the use of UTC. Replaced the term “calibration” with the more appropriate term “compensation”. Modification to scope. New text added under clause 7, Holdover. Modifications to Appendix III

AAP Current Status