This object indicates the Clock Mode when Clock type is G.8275.1 (meaning agnClkSrcPortSrcIdx=(5) or (6), and agnClkSrcPortType=5 notApplicable(1) - means agnClkSrcPortSrcIdx is not equal to 5 or 6. ordinaryClock(2) - means Clock entity actual Role is Master or Slave. boundaryClock(3) - meams Clock entity actual Role is Boundary Clock.