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Glossary
Terms and Definitions
G L - 2 4
Lucent Technologies - Proprietary
See notice on first page
365-372-327 R2.0
Issue 1, October 2003
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Loop Timing
Loop timing is a special case of line timing. It applies to NEs that have only
one OC-N interface. For example, terminating nodes in a linear network are
loop timed. See Line Timing.
LOP - Loss of Pointer
A failure to extract good data from an STS-1 payload.
LOS - Loss of Signal
The complete absence of an incoming signal.
LR - Long Reach
A term used to describe distances of 40 km or more between optical transmitter
and reciever without regeneration. See Intermediate Reach.
M
Main
The two slots (M-1 and M-2) on the Metropolis
®
DMXtend shelf in which the
OC-3 or OC-12 main OLIU circuit packs are installed.
Midspan Meet
The capability to interface between two lightwave terminals of different
vendors. This applies to high-speed optical interfaces.
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.
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: onr or more high- and low-speed
transmission ports, built-in intelligence, synchronization and timing capability,
and access interfaces for use by technicians and/or operation systems. In
addition, a network element may also include a time slot interchanger.
