Description: This object describes and controls the control function sub-system on the node.

up(1) The control function sub-system is fully functioning. This is the only state where it is possible to establish new channels. This is the only value possible to write to this object. When writing this value, the control function sub-system is forced to this state, which may result in all established channels to be removed or re-established.

recover(2) The control function sub-system is in the process of recovering the state of all channels after a node or control function sub-system failure, where it is When the process of recovering the channels is completed, the state will change to either up(1) if all channels state were successfully recovered, or limited(3) if the state of any channels failed to be recovered.

limited(3) The control function sub-system is not or has not been able to recover the state of all its channels after a node or control function sub-system failure. The already existing channels through the node may be fully functional, but it is not accepting any channel signaling. All link must be taken down for the control function sub-system to be able to assume a known state, which typically requires operator intervention. This state can be exited by writing up(1) to the object.

noControl(4) The control function sub-system is failing and is not responding. Signaling to the neighboring node is thus not possible. Already existing channels through the node may still be fully functional, but their state is not known. This state can be exited by writing up(1) to the object.