The protection scheme state identifies the state in which the protection scheme is in.  PSS_FORCED_OR_LOCKED_OUT indicates that the entire group is locked; partial locking is indicated by PSS_AUTOMATIC.
Individual locks can be reported through transmission parameters on the appropriate TPs.
Changes in the value of this attribute lead to a State Change notification.

Readable by NMS? Yes
Writeable by NMS? No
Invariant? No
