Glossary
Issue 3 June 2000
GL-13
MXBIU
Multiplexer and Backplane Interface Unit
MXRVO Circuit Pack
The MXRVO circuit pack multiplexes seven VT-G signals from the DS1 circuit packs to an STS-1
signal for connection to the OLIU circuit packs.
N
NE
Near-End — The network element the user is at or working on. Also called local.
NE
Network Element — The basic building block of a telecommunications equipment within a telecom-
munication network that meets SONET standards. Typical internal attributes of a network element
include: one or more high- and low-speed transmission ports, built-in intelligence, synchronization
and timing capability, access interfaces for use by technicians and/or operation systems. In addition,
a network element may also include a time slot interchanger.
NE-ACTY
Near End Activity — An LED on the user panel.
NEBS
Network Equipment-Building System
nm
Nanometer (10
-9
meters)
NMA
Network Monitoring and Analysis — An operations system designed by Telcordia Technologies
which is used to monitor network facilities.
NMON
Not Monitored — A provisioning state for equipment that is not monitored or alarmed.
NMLI
Native Mode LAN Interface external to the DDM-2000 FiberReach multiplexer.
Node
In SONET a node is a line terminating element.
Non-Revertive
A protection switching mode in which, after a protection switch occurs, the equipment remains in its
current configuration after any failure conditions that caused a protection switch to occur clear or
after any external switch commands are reset. (See Revertive.)
NRZ
Nonreturn to Zero
NSA
Not Service Affecting
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