iple DES), 376, 622 packet radio data networks, 584-586 3G Partnership Project (3GPP), 599, 696, 700 1X RTT (Radio Transmission Technology), 608 3G (third-generation) cellular networks, 597-611 1xEV-DO (Enhanced Version-Data Only), 608 3.5G standards, 602-605 1xEV-DV (Enhanced Version-Data and Voice), 608 CDMA2000, 606-609 2.5G (intermediate second-generation) cellular CDMA450, 609 networks, 592-597 comparing mobile data architectures, 627 defined, 580 defined, 580 EDGE, 595-596 deployment issues, 609-611 GERAN, 596 HSDPA, 602-604 GPRS, 593-595 HSOPA, 605 HSCSD, 593 HSUPA, 604-605 messaging services standards, 596-597 IMS for, 697 primary techniques of, 592-593 overview of, 597-599 2BIQ (2 Binary 1 Quaternary), 158 standards, 599-601 2G (second-generation) cellular networks, TD-SCDMA, 606 586-592 UMTS TDD/TD-CDMA, 605 cdmaOne, 590-591 UMTS/W-CDMA, 601-602 defined, 580 3GPP (3G Partnership Project), 599, 696, 700 Index 4G (fourth-generation) cellular networks Add/drop multiplexers (ADMs) defined, 581 OADMs, 463-464 MeshCube, 656 in SDH/SONET network, 128-129 wireless broadband, 612-615 Address Resolution Protocol (ARP), 258 5G (fifth-generation) wireless, 581, 614-615 Address signals, PSTN, 130 6bone, 279 Adjacencies, in OSPF, 261 6to4, 277-278 ADMs (add/drop multiplexers) OADMs, 463-464 overview of, 128-129 A (access) link, 134 ADPCM (Adaptive Differential PCM) AAA (authentication, authorization, and high bit-rate vocoders, 576 accounting) voice compression standard, 119-120 IMS with, 422 waveform coders, 324 RADIUS for WLAN security, 648 ADSL (Asymmetrical Digital Subscriber Line) VPN security with, 375 ADSL2, 505-506 AAL (ATM adaptation layer), 233-235 ADSL2+, 506-507 Abilene Project, 292 ADSL2-RE, 507 ABR (area border router), 261 defined, 50 ABR (available bit rate), 439 overview of, 503-505 Access Advanced Encryption Standard (AES), 328, 377 AAA server in VPN security, 375 Advanced intelligent networks (AINs), 136-137 broadband outer tier, 428 Advanced Mobile Phone System (AMPS), 581, LAN methods, 182-185 58