Alcatel-Lucent 1643 AMS Operation Manual page 366

Glossary
NMS
Network Management System
NNE
Non-SDH network element
NNI
Network Node Interface
Node
A node or network element is defined as all equipment that is controlled by one system
controller.
Node
Defined as all equipment that is controlled by one system controller. A node cannot
always be directly managed by a management system. See also network element.
NOMC
Network Operation Maintenance Channel
Non-revertive switching
In non-revertive switching, there is an active and standby high-speed line, circuit pack,
etc. When a protection switch occurs, the standby line, circuit pack, etc., is selected
causing the old standby line, circuit pack, etc., to be used for the new active line, circuit
pack, etc. The original active line, circuit pack, etc., becomes the standby line, circuit
pack, etc. This status remains in effect when the fault clears. Therefore, this protection
scheme is "non-revertive" in that there is no switch back to the original status in effect
before the fault occurred.
Non-revertive switching
In non-revertive switching there is an active and a standby high speed line, circuit pack,
etc. When a protection switch occurs, the standby line, circuit pack, etc. is selected
which causes the old standby line, circuit pack, etc, to be used for the new active line,
circuit pack, etc. The original active line, circuit pack, etc. becomes the standby line,
circuit pack, etc. This status remains in effect when the faults clears. Therefore, this
protection scheme is non-revertive in that there is no switch back to the original status
that was in effect before the fault occurred.
Non-synchronous
The essential characteristic of timescales or signals such that their significant instants do
not necessarily occur at the same average rate.
Not Protected Domain
The Not Protected Domain for the ITM-SC contains all the network elements that are
managed by that ITM-SC and are not currently protected by another ITM-SC. If the
ITM-SC fails, the network elements in this domain are not managed by any ITM-SC.
See also Geographic Redundancy.
NPI
Null Pointer Indication
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GL-20 Alcatel-Lucent - Proprietary
See notice on first page
365-312-803R7.2
Issue 4, May 2007