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Glossary
NMS
Network Management System. A system responsible for
managing at least part of a network. An NMS is generally a
reasonably powerful and well-equipped computer, such as an
engineering workstati
keep track of network statistics and resources.
NOC
Network Operations Center. The physical space from which a
typically large telecommunications network is managed,
monitored and supervised.
NPU
Network Pr
NRT
Non Real Time. is very similar to the Real-Time polling service
except that connections may utilize random access transmit
opportunities for sending bandwidth requests. These Non Real
Time Variable Bit Rate (NRT-VBR) services, such as file transfer
and Internet access with a minimum guaranteed rate, are
characterized by requirement for a guaranteed rate, but can
tolerate longer delays and are rather insensitive to jitter. Service
parameters include CIR, Committed Time (CT), and MIR that
limit t
expand to occupy full bandwidth.
OA&M
Operation, Administration & Maintenance. Provides the facilities
and the personnel required to manage a network.
ODU
Outdoor Unit
OFDM
Orthogonal Frequency Division Multiplexing: A method for
multiplexing signals, which divides th
a series of frequencies known as tones. Orthogonal tones do not
interfere with each other when the peak of one tone corresponds
with the null. The rapid switching, frequency-hopping technique
is intended to allow more robust data service.
OOB
Out-Of-Band
PER
Packet Error Rate. In a digital transmission, PER is the
percentage of packets with errors divided by the total number of
packets that have been transmitted, received or processed over a
given time period.
PHY
PHYsical Layer. The physical, or lowest, laye
Model. In a wireless network, the PHY defines parameters such
as data rates, modulation method, signaling parameters,
transmitter/receiver synchronization, etc. Within an actual radio
implementation, the PHY c
baseband signal processing sections.
VIII
on. NMSs communicate with agents to help
ocessing Unit
he rate as otherwise bandwidth
orresponds to the radio front end and
intensive services may
e available bandwidth into
r of the OSI Network
BreezeMAX System Manual
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