Indicates the Type of the Clock Instance. There are five Device Types. 0: Inactive - passive clock instance 1: Ord-Bound - clock's Device Type is Ordinary-Boundary Clock. 2: P2p Transp - clock's Device Type is Peer to Peer Transparent Clock. 3: E2e Transp - clock's Device Type is End to End Transparent Clock. 4: Master Only - clock's Device Type is Master Only. 5: Slave Only - clock's Device Type is Slave Only. 6: Boundary Clock frontend clock instance, only 1-step, 1-way is supported.