The value of aluPtpClockSyncCertaintyState indicates the synchronization certainty state of the clock. When the clock is acting as a Grandmaster (ie. a master only ordinary clock or a boundary clock with a PRTC timing source) the aluPtpClockSyncCertaintyState is encoded as 'certain(1)' if the aluPtpClockFreqTraceable and aluPtpClockTimeTraceable are 'true(1)'. If either of these attributes are 'false(2)', the aluPtpClockSyncCertaintyState is 'uncertain(2)'. When the clock is acting as a slave (ie. boundary clock or an ordinary slave clock with a slave ptp-port)the aluPtpClockSyncCertaintyState is 'certain(1)' if all the following are true: 1) the aluPtpParentSyncCertaintyState is 'certain(1)' 2) the SETS is locked to a frequency reference that equivalent or better than the aluPtpClockClass when converted to TmnxSSMQualityLevel. 3) the clock as a ptp-port that has a aluPtpPortDSPortState that is in the 'slave (9)' state. The aluPtpClockSyncCertaintyState values 'certain(1)' and 'uncertain(2)' are only supported when the aluPtpClockProfile is 'g8275dot1-2014 (3)'. For all other profiles only 'unknown(0)' is supported.