-170, 255 DiffServ Code Point (DSCP) DBPSK (Differential Binary PSK), 644 DiffServ using, 300, 444 DBS (Direct Broadcast Satellite), 529 IPv6 with, 276 Index Digital Audio Broadcast (DAB), 402, 632, 708-709 Directional antennas, 556 Digital audio radio, 71 Disaster recovery, microwave, 59 Digital cellular radio, 586-592 Discrete Multitone Technology. See DMT (Discrete cdmaOne, 590-591 Multitone Technology) defined, 580 Disney, 713 GSM, 567, 588-589 Distance-vector routing protocols, 259 overview of, 586-588 Distribution routers, 288 PDC, 592 DLCs (digital loop carriers) UWC, 589 architecture of, 117 Digital certificates, 380-381 evolution of, 117 Digital cross-connects (DCSs). See DCSs (digital intelligent multiplexing, 28-29 cross-connect) systems next-generation, 471-472 Digital data services (DDSs), 205-206 DLECs (data competitive local exchange carriers), Digital entertainment realm, xxxviii 105-106 Digital libraries, 306 DMB (Digital Multimedia Broadcasting) Digital loop carriers. See DLCs (digital loop DMB-T, 402 carriers) mobile TV standard, 708-709 Digital Millennium Copyright Act, 33 overview of, 634-636 Digital Multimedia Broadcasting. See DMB (Digital S-DMB, 632-633, 709 Multimedia Broadcasting) T-DMB, 632-633, 709 Digital Multimedia Broadcasting-Terrestrial DMB-T (Digital Multimedia Broadcasting- (DMB-T), 402 Terrestrial), 402 Digital objects, 306 DMT (Discrete Multitone Technology) Digital Subscriber Line. See DSL (Digital Sub- ADSL deployment with, 504 scriber Line) defined, 159 Digital television service, IPTV, 342-345 EFM using, 482 Digital terrestrial television (DTT), 400 DNS (Domain Name System), 250 Digital transmission importance of domain names, 283-284 conversion, 20-23 overview of, 280-281 overview of, 19-21 top-level domains, 281-283 PSTN access lines, 108 DoCoMo Super 3G, 612-613, 615 twisted-pair used in, 47-50 DOCSIS (Data Over Cable Service Interface Digital TV. See DTV (digital TV) Specifications) Digital video, 390-396 defined, 513 compression for, 393-396 DOCSIS 1.0, 514 delay and 