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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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