noOp - initial state only (cannot be Set by user). clear - clearing the last performed command. Can be Set only if previous state was other than noOp or clear. forcedSwitch - transferring service from primary channel to the secondary channel. Can be Set only if previous state was noOp or clear. If the non-Active channel is failed, the command will be rejected. lockout - freezing the current state. In 1+1 Bidirectional Optimized switching, Lockout is considered as a local request which is not signalled across the K-bytes. The effect of lockout is to freeze the selector position and transmitted K-bytes until the lockout request is cleared. Can be Set only if previous state was noOp or Clear.