alarm log
A history of setting and clearing system alarms on the NE.
alarm severity
An attribute that defines the priority of the alarm message. The method in which alarms are
processed depends on their severity.
ALPHG
Low Power High Gain DWDM Amplifier. See “AHPHG ” (p. GL-1) for related term.
American National Standards Institute (ANSI)
A United States standards body that accredits standards for programming languages,
communications, and networking. ANSI is the U.S. representative in the International
Organization for Standards (ISO).
amplified spontaneous emission (ASE)
Optical noise generated in an erbium-doped fiber amplifier (EDFA) with and without signal input
power.
ANSI
See “American National Standards Institute” (p. GL-2) for definition.
APD
See “avalanche photodiode” (p. GL-3) for definition.
APS
See “automatic protection switching” (p. GL-3) for definition.
APSD
See “automatic power shutdown” (p. GL-3) for definition.
ASE
See “amplified spontaneous emission” (p. GL-2) for definition.
asynchronous
Data that is transmitted without an associated clock signal.
asynchronous transfer mode (ATM)
A fast-packet, connection-oriented, cell-switching technology for broadband signals. ATM is
designed to accommodate any form of data, including voice, facsimile, computer data, video,
image, and multimedia, whether compressed or uncompressed, whether real-time or non-real-time
in nature, and with guaranteed quality of service (QoS).
ATM networks will accept or reject connections based on a user's average and peak bandwidth
requirements, providing flexible and efficient service for LAN-to-LAN, compressed video, and
other applications that involve variable bit rate (VBR) traffic.
ATM
See “asynchronous transfer mode” (p. GL-2) for definition.
Glossary
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GL-2
1830 PSS-36/PSS–32/PSS-16/PSS-4
8DG60888CAAA Release 3.6.0 and 3.6.1
Issue 1 June 2011
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