CPC H04J 3/0667 (2013.01) [H04J 3/0617 (2013.01); H04J 3/0629 (2013.01); H04J 3/0688 (2013.01)] | 7 Claims |
1. A method for switching clock sources, the method comprising:
monitoring Precision Time Protocol (PTP) packets received via a first PTP port connected to a new grandmaster (GM);
calculating a frequency and a phase for the first PTP port based on the received PTP packets;
based on the calculated frequency and phase for the first PTP port, determining whether to add the first PTP port to a list of candidate ports; and
selecting a slave port using the list of candidate ports.
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