User manual

In this appendix:
Boundary clock ................................................................. A-1
Epoch ............................................................................... A-1
Grandmaster clock ........................................................... A-1
Master clock ..................................................................... A-2
PTP .................................................................................. A-2
PTP port ........................................................................... A-2
PTP subdomain ................................................................ A-2
Boundary clock
A clock with more than a single PTP port, with each PTP port providing access
to a separate PTP communication path. Boundary clocks are used to eliminate
timing fluctuations caused by routers and other network elements.
Definition derived from NIST website (http://ieee1588.nist.gov).
Epoch
The reference time defining the origin of a time scale. For PTP, the epoch is
January 1, 1970.
Definition derived from NIST website (http://ieee1588.nist.gov).
Grandmaster clock
Serves as the primary reference time to which all other clocks are ultimately
synchronized. If there is synchronization across multiple subnetworks, the
grandmaster clock is the reference of time for all subnetworks.
Definition derived from NIST website (http://ieee1588.nist.gov).
Appendix A
IEEE-1588 Glossary of Terms