Aligning
Using a pointer to indicate the head of a virtual container, e.g. to create an
Administrative Unit (AU) or a Tributary Unit (TU).
ALS
Automatic Laser Shutdown
Alternate Mark Inversion (AMI)
A line code that employs a ternary signal to convert binary digits. In this line code
successive binary ones are represented by signal elements that are normally of
alternately positive and negative polarity but are equal in amplitude, binary zeros are
represented by signal elements that have zero amplitude.
American Standard Code for Information Interchange (ASCII)
A standard 8-bit code that is used to exchange information among data processing
systems and associated equipment.
Anomaly
A difference between the actual and the desired operation of a function.
ANSI
American National Standards Institute
APS
Automatic Protection Switching
AS
Alarm Suppression assembly
Assembly
Gathering together of payload data with overhead and pointer information (an indication
of the direction of the signal).
Association
A logical connection between manager and agent through which management information
can be exchanged.
Asynchronous
See Non-synchronous.
ATC
Auxiliary Transmission Channel
ATM
Asynchronous Transfer Mode
AU
Administrative Unit
AU4AD
Administrative Unit 4 Assembler/Disassembler
Glossary
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GL-2
Lucent Technologies - Proprietary
See notice on first page
365-312-847R4.0
Issue 4, November 2006