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Glossary and Abbreviations
GL-1
DEFINITY ECS Release 8.2 ATM Installation,
Upgrades, and Administration
555-233-124
Issue 1
April 2000
GL
Glossary and Abbreviations
Numerics
800 service
A service in the United States that allows incoming calls from certain areas to an assigned number
for a flat-rate charge based on usage
AAR
Automatic Alternate Routing—digit analysis performed in support of the private network
numbering plan(s).
AC
Access Concentrator
ACD
Automatic Call Distribution
AFI
Address Format Identifier
AIS
Alarm Indication (or Inhibit) Signal—inserted when a network element receives a “bad” signal, and
forwarded downstream to tell the receivers what happened.
ARS
Automatic Route Selection—digit analysis performed in support of the public network numbering
plan(s)
ATM
Asynchronous Transfer Mode
ATM network duplication
ATM network duplication is an ATM-PNC configuration that allows DEFINITY ECS’s without
duplicated SPEs to be supported with duplicated EPN connectivity to other points on an ATM
network. These points can be on separate ATM switches, the same ATM switch, or directly
connected to an ATM-WAN. There is no difference in performance between ATM network
duplication and critical reliability.