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IEEE C37.238a-2023

IEEE Standard Profile for Use of IEEE 1588™ Precision Time Protocol in Power System Applications Amendment 1: Adding a Type-Length-Value (TLV) to Indicate the Latest International Earth Rotation Service (IERS)-Specified Universal Time Coordinated (UTC) Leap Second Event

Amendment Standard - Active. This amendment to IEEE Std. C37.238™-2017 specifies a LEAP_SECOND_EVENT TLV to enable grandmaster-capable clocks to distribute leap second event and validity information in advance.

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