SDN (Integrated Services Digital Network), 180, assigned to databases and applications, 34 IPv6 addressing, requirement for 4G cellular BRI and PRI ISDN, 254 networks, 333 DLC support of, 200 traffic switched between with MPLS, 173 sililarities of PRI ISDN and T1, 255 IP based public network traffic, 171 using PRI ISDN trunks for caller identifica- IP-BSC (Internet Protocol base station controller), tion, 255 ISPs (Internet service providers), 10 IP Centrex, 180, 222 cloud initiatives, 34 iPhone, 356, 397 term used synonymously with providers and IP (Internet Protocol) carrriers, 167 all-IP packet infrastructure in 4G mobile used synonymously with carriers, 271 networks, 332 wireless Internet service providers (WISPs), connecting core networks to cell sites, 344 databases in LTE IP core, 344 Italy functions of LTE IP core, 343 TIM (Telecom Italia Mobile) Brasil, 404 support of core networks by WiMAX 2 and WiND Telecom, 420 LTE-Advanced, 332 ITU (International Telecommunications Union), TCP/IP protocols, 22 transitioning to IPv6, 274 broadband use in China, 218 version 6 and version 4 (IPv6 and IPv4), 267 H.323 signaling standards, 101 addressing schemes, 272 IMT-2000 3G standards, 324 IP multimedia subsystem (IMS), 184, 185 Optical Transport Network (OTN) standard, IP private branch exchanges (PBXs), 74 architecture, 77 spectrum allocation, 318 overview of architecture, 78 Synchronous Ethernet, 172 using hosted-IP PBX services, 92 iTunes, 16 IPsec (Internet Protocol Security), 231 ITU-R) International Telecommunications Union- token identification with, 234 Radiocommunication, 332 IPsec VPNs, 355 required capabilities for 4G technologies, 332, IP telephone systems, 53, 72-74. See also VoIP direct and indirect cchannels and management, ITU-Telecommunications (ITU-T), Control Plane Technology standard, 176 manufacturers, 74 for small to medium-sized businesses, 82 technology behind, 75-77 IP traffic J3, comparison to T3 and E3 standards, 247 carried on same wavelength as SONET/SDH jacks (outlets), 40, 84 on OTN equ