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direct broadcast satellite
direct bury cable
direct current
direct distance dialing
direct inward dial
direct inward system access
direct outward dial
direct sequence spread spectrum
direct-to-home
directionality
directivity
Directorate General XIII
directory number
DISA
discard eligible
discrete amplification
discrete cosine transform
discrete multitone
disk operating system
dispersion
dispersion-shifted fiber
distance-vector routing protocol
distinctive ringing
distortion
distributed amplification
distributed feedback laser
Distributed Queue Dual Bus
| distribution frame
diurnal wander
Divestiture Decree
DLC
DLCI
DLL
DMT
DN
DND
DNIS
DNR
DNS
do-not-call registry
do not disturb
DOCSIS
DOD
domain
domain name
Domain Name Resolver
Domain Name System
Domsat Decision
dongle
dopant
doping
Doppler effect
DOS
dot
| dots per inch
dotted decimal notation
dotted quad
double sideband modulation
downlink
download
downstream
downtime
DPCM
DPLC
DPSK
DQDB
DQPSK
Draft-Martini VPN
drain wire
driver
drop
drop wire
dry
dry copper pair
DS
DS-0
DS-1
DS-1C
DS-2
DS-3
DS-4
| DS-5
DSA
DSB
DSF
DSI
DSL
DSL access multiplexer
DSL Forum
DSLAM
DSP
DSSS
DSU
DTE
DTH
DTMF
DTV
du jour
dual attached concentrator
dual attached station
dual counter-rotating ring
dual tone multifrequency
duct
duct tape
dumb terminal
duplex
duty cycle
DUV
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