AT&T DEFINITY 2500 series Network Manual page 308

AB-2
ABBREVIATIONS
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CO
CRC
CSM
CSU
DAC
DACS
DCE
DCIU
DCS
DDS
DID
DMI
DNIS
DOD
DSC
DSU
DTE
DTMF
E&M
E-INOS
EIA
ENP
EPSCS
ESF
central office
cyclic redundancy check
Centralized System Management
customer service unit
dial access code
digital access and crossconnect system
data circuit-terminating equipment
data communications equipment
data communications interface unit
distributed communications system
digital service
DATAPHONE
direct inward dialing
digital multiplexed interface
dialed number identification service
direct outward dialing
dedicated switched connection
data service unit
data terminal equipment
dual-tone multi-frequency (dialing)
ear and mouth (signaling)
Enhanced Interactive Network Optimization System
Electronic Industry Association
extension number portability
Enhanced Private Switched Communications Service
extended super frame