| Description | This object specifies the Clock state returned by PTP engine
which was described earlier.
Freerun state. Applies to a slave device that is not locked to
a master. This is the initial state a slave starts out with
when
it is not getting any PTP packets from the master or because of
some other input error (erroneous packets, etc).
Holdover state. In this state the slave device is locked to a
master but communication with the master is lost or the
timestamps in the ptp packets are incorrect. But since the
slave was locked to the master, it can run with the same
accuracy for
sometime. The slave can continue to operate in this state for
some time. If communication with the master is not restored for
a while, the device is moved to the FREERUN state.
Acquiring state. The slave device is receiving packets from a
master and is trying to acquire a lock.
Freq_locked state. Slave device is locked to the Master with
respect to frequency, but not phase aligned
Phase_aligned state. Locked to the master with respect to
frequency and phase. |