Glossary
GL-2 Issue 3 June 2000
AGNE
Alarm Gateway Network Element — A defined NE in an alarm group through which members of the
alarm group exchange information.
AIS
Alarm Indication Signal — A code transmitted downstream in a digital network that shows that an
upstream failure has been detected and alarmed.
AMI
Alternate Mark Inversion — A line code that employs a ternary signal to convey binary digits, in
which successive binary ones are represented by signal elements that are normally of alternating,
positive and negative polarity but equal in amplitude, and in which binary zeros are represented by
signal elements that have zero amplitude.
ANSI
American National Standards Institute
APS
Automatic Protection Switch
ARM
Access Resource Module
AS&C
Alarm, Status, and Control
ASCII
American Standard Code for Information Interchange — A standard 8-bit code used for exchanging
information among data processing systems and associated equipment.
ASN.1
Abstract Syntax Notation 1
ASNE
Alarm Server Network Element
AT M
Asynchronous Transfer Mode
Auto
Automatic — One possible state of a DS1 or DS3 port. In this state, the port will automatically be
put "in service" if a good signal is detected coming from the DSX panel.
Automatic Protection Switch
A protection switch that occurs automatically in response to an automatically detected fault condi-
tion.
Automatic Synchronization Reconfiguration
A feature that allows another synchronization source to be automatically selected and the synchro-
nization source provisioning to be automatically reconfigured in the event of a synchronization
source failure or network synchronization change, for example, a fiber cut.
AUXCTL
Auxiliary Control — The name of the slot to the left of the SYSCTL slot on the DDM-2000 OC-3 and
FiberReach wideband shelves and to the right of the SYSCTL slot on the DDM-2000 OC-12 shelf.
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