Precision Time Protocol [1] is an alternative. CERN has been using it as part of a project to achieve sub-nanosecond accuracy over a wired network [2]. [1] ht

Precision Time Protocol [1] is an alternative. CERN has been using it as part of a project to achieve sub-nanosecond accuracy over a wired network [2]. [1] https://en.wikipedia.org/wiki/Precision_Time_Protocol https://en.wikipedia.org/wiki/Precision_Time_Protocol [2] https://en.wikipedia.org/wiki/White_Rabbit_Project https://en.wikipedia.org/wiki/White_Rabbit_Project