Precision Time Protocol (PTP)

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The Precision Time Protocol, as defined in the IEEE-1588 standard, provides a method to precisely synchronize computers over a Local Area Network (LAN) to an accuracy that was previously unobtainable. On an existing LAN, PTP is capable of synchronizing multiple clocks to better than 10 microseconds RMS. A Network Time Server with a GPS or CDMA receiver and PTP are typically referred to as an "IEEE-1588 GrandMaster". This paper will describe the basic principles of PTP, various implementations of PTP, measurement methods, and synchronization results using an EndRun GrandMaster