About Network Clock Sources
Network clock sources are timing devices that use a signal from an atomic clock or other external reference source to set and maintain a central time for all of the elements in a network. They minimize the number of external time-synchronization links, provide a common frame of reference (time) for all network devices, and help ensure the accuracy of network logic. Network clock sources can use an asynchronous transfer mode (ATM) switch to receive clocking signals from a private branch exchange (PBX), a building integrated timing supply (BITS), or another ATM switch. Typically, a PBX receives its timing signal from a public switched telephone network (PSNT). This method that is suitable for applications in which the network is already connected to telephone equipment via circuit emulation services (CES). Network clock sources that use a BITS can use a T1, E1, or other high-speed connection to provide DS1 timing to all of the network devices within a building, office, or facility. DS1 timing outputs are derived from the optical line rate and are relatively jitter-free.
Engineering Web: Network Clock Sources - Machine Design
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Industrial Networks Get Synced Up | Machine Design Adaptive Clock Recovery (ACR): ACR algorithms attempt to reproduce the master network clock at far-away nodes. |
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Ethernet in Real time | Machine Design First, all nodes on the network synchronize their time to a master clock. |
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Most Recent | Machine Design of surface-mount crystal units, NX5032GA and NX8045GB, provide clock signal sources for CPUs in automotive powertrains and safety-control devices. |
