AT&T DEFINITY 2500 series Network Manual page 307

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4ESS
5ESS
AAR
ACA
ACD
ACP
ADPCM
ADU
AMI
APLT
ARS
AUDIX
B8ZS
BCC
BCCOS
BEHO
BOS
BRI
CAD/CAE
CAS
CCSA
ABBREVIATIONS
number 4 electronic switching system
number 5 electronic switching system
Automatic Alternate Routing
Automatic Circuit Assurance
Automatic Call Distribution
action control point (for SDN)
adaptive differential pulse-code modulation
asynchronous data unit
alternate mark inversion
advanced private-line termination
Automatic Route Selection
Audio Information Exchange
binary-8 zero-suppression (line coding)
bearer capability class
bearer capability class of service
best end hop off
bit-oriented signaling
basic rate interface
computer assisted design/computer assisted engineering
Call Accounting System
Centralized Attendant Service
common control switching arrangement
AB-1