ITU-T G.8275.2 (PTP Profile - PTS) One-Page Summary

Title: PTP telecom profile for phase/time synchronization with partial timing support from the network

Summary

• Defines the profile (options, parameters, extensions) for the use of PTP for packet-based
  time/phase delivery over existing networks

• Operates using unicast delivery over IPv4 or IPv6 networks

• Main use-case is time synchronization of TDD-based cellular basestations

Status

• Current version: 3rd Edition, November 2022

• Download from: http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=12833

Key Contents

Profile Features:

• Unicast Messaging - easier to support and manage in telecoms networks
• Message rates up to 128 messages per second (typical rates 16 to 32)
• Operates over IPv4/UDP for universal applicability (IPv6 also permitted)
• Operates over existing telecoms networks, with no PTP “on-path” support required
• Planned protection schemes in accordance with existing telecom practice
• Re-uses the alternate BMCA and clock class assignments from G.8275.1