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AB-2
ABBREVIATIONS
DACS
dB
DCE
D/CO
DCP
DID
DIF
DIP
DMI
DMI-BOS
DMI-MOS
DNIS
DPO
DS1
DSU
DSX-1
DTE
D/TO
D/TT
E&M
EDSL
EIA
EPSCS
ES
ESF
FAS
FRL
FX
FXO
FXS
GRS
HDLC
Hz
digital-access and cross-connect system
decibel
data circuit-terminating equipment
digital CO trunk
Digital Communications Protocol
Direct Inward Dialing
digital interface frame
dual in-line package
digital multiplexed interface
digital multiplexed interface with bit-oriented signaling
digital multiplexed interface with message-oriented signaling
dialed-number identification service
dial-pulse originating
digital signal level 1
data service unit
digital signal level 1 cross-connect field
data terminal equipment
digital toll office trunk
digital tie trunk
Ear and mouth
extended digital subscriber line
Electronics Industries Association
Enhanced Private Switched Communications Service
errored second
extended superframe
facility associated signaling
facilities restriction level
foreign exchange
foreign exchange office
foreign exchange subscriber
Generalized Route Selection
High-Level Data Link Control
hertz