ITU-T G.8272 (PRTC) One-Page Summary

Title: Timing characteristics of Primary Reference Time Clocks

Summary

  • Primary Reference Time Clock equipment specification

  • Provides an accurate time reference into the network, using either 1pps or PTP output

  • Typical implementation based on GNSS

  • Jitter/wander based on PRC specification (G.811)

  • Describes test strategies for evaluating the performance of PRTC implementations

Status

Key Contents

Time Accuracy (clear sky)

  • Class A PRTC: within 100ns of UTC (or applicable primary time standard)
  • Class B PRTC: within 40ns of UTC (or applicable primary time standard)

Wander:

Functional Model:

Test Strategies:


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