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Glossary
Issue 3 June 2001
GL-13
Multiplexing
The process of combining several distinct digital signals into a single composite digital
signal.
Mult
Multipling. The cascading of signals in a bay. In the MULT mode, the DS1 external
reference can be cascaded to other shelves in a bay using Mult cables. Normally starting
with the bottom shelf (Number 1) and working towards the top of the bay.
MUX
Multiplex
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
telecommunication 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 which is
used to monitor network facilities.
NMON
Not Monitored — A provisioning state for equipment that is not monitored or alarmed.
Node
In SONET a node is a line terminating element.
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