White Papers

Introduction of NTP (PDF)
Description: The need for synchronized time is critical for today’s network environments. Using NTP is an excellent way to keep a large number of network nodes in close synchronization. NTP requires a minimum of network overhead and can also maintain a high level of synchronization accuracy and security. In addition, an effectively designed NTP infrastructure is relatively easy to implement, making NTP ideal for both small and large enterprise networks.
Precision Time Protocol (PTP/IEEE-1588) (PDF)
Description: The Precision Time Protocol, as defined in the IEEE-1588 standard, provides a method to precisely synchronize computers over a Local Area Network (LAN). PTP is capable of synchronizing multiple clocks to better than 100 nanoseconds on a network specifically designed for IEEE-1588. A Network Time Server with PTP is typically referred to as an “IEEE-1588 Grandmaster” or “PTP Grandmaster”. This paper describes basic principles of PTP, information on using dual Grandmasters, and the requirements of the network to achieve sub-100 nanosecond time synchronization.