
Alarm Severity
The significance of a change in system performance or events. According to ITU-T
recommendations, an alarm can have one of the following severities: Critical, Major,
Minor, Warning.
Alarm suppression
An alarm management method. Alarms that are set to be suppressed are not reported
from NEs any more.
ALS
APS
Automatic Protection Switching
asynchronous
Pertaining to, being, or characteristic of something that is not dependent on timing.
Asynchronous
Transfer Mode
A protocol for the transmission of a variety of digital signals using uniform 53 byte cells.
A transfer mode in which the information is organized into cells; it is asynchronous in
the sense that the recurrence of cells depends on the required or instantaneous bit rate.
Statistical and deterministic values may also be used to qualify the transfer mode.
ATM
ATPC
Automatic Transmit Power Control
attenuation
Reduction of signal magnitude or signal loss, usually expressed in decibels.
AU
AUG
auto-negotiation
An optional function of the IEEE 802.3u Fast Ethernet standard that enables devices to
automatically exchange information over a link about speed and duplex abilities..
Automatic laser
shutdown
A technique (procedure) to automatically shutdown the output power of laser transmitters
and optical amplifiers to avoid exposure to hazardous levels.
Automatic Protection
Switching
Capability of a transmission system to detect a failure on a working facility and to switch
to a standby facility to recover the traffic.
Automatic Transmit
Power Control
A method of adjusting the transmit power based on fading of the transmit signal detected
at the receiver.
A.3 B
backplane
An electronic circuit board containing circuits and sockets into which additional
electronic devices on other circuit boards or cards can be plugged.
backup
A periodic operation performed on the data stored in the database for the purposes of
database recovery in case that the database is faulty. The backup also refers to data
synchronization between active and standby boards.
bandwidth
A range of transmission frequencies that a transmission line or channel can carry in a
network. In fact, it is the difference between the highest and lowest frequencies the
transmission line or channel. The greater the bandwidth, the faster the data transfer rate.
BDI
Backward Defect Indicator
BER
BER tester
Used to measure the bit error rate (BER) of signals during transmission.
Binding strap
The binding strap is 12.7 mm wide, with one hook side (made of transparent
polypropylene material) and one mat side (made of black nylon material).
OptiX OSN 550 Multi-Service CPE Optical Transmission
System
Configuration Guide
A Glossary and Acronyms
Issue 02 (2011-06-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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