tional Telecommunications Union, icon-driven controls, 263 International Telecommunications Union IETF protocols, 296 (ITU), 111, 335 I-frame International Telecommunications Union's intraframe coding, as defined by MPEG, Telecommunications Standardization Sector (ITU-T), 12 IGMP-2, 184 Internet, 169 image resolution, 306 Internet Activities Board (IAB), 338 impedance, 442 Internet Engineering Task Force, 442 implementing videoconferencing Internet Engineering Task Force (IETF), 169, behavioral changes, 270 Internet Group Management Protocol IMTC, 147 (IGMP), 184 work on T.120 family of Internet Integrated Services, 175 Recommendations, 151 Internet Layer (TCP/IP), 170 I-muxes, 208 Internet Protocol (IP), 124, 169 indirect acoustic coupling, 273 interoperability standards, 11 information security, 131, 312, 313, 314, 315, 316, 319, 471 Interpolation, 445 installation definition, 341 of a group-oriented videoconferencing interviewing clients system, 269 as part of developing a business case, 56 Instructional Television Fixed Service (ITFS), intraframe coding, 243, 445 Intranets, 169, 295 instructions for use of videoconferencing, IP addresses, 171 Intel, 5, 12, 30, 48, 103, 108, 141, 213, 221, classes of, 184 232, 245, 290, 298, 299, 300, 323, 326, 424 IP multicasting, 183 Digital Video Interactive (DVI), 421 what it does, 183 introduction of ProShare, 11 IPSec, 131, 317, 435 Intel's ProShare family of personal IPX, 144, 478 conferencing products, 5 ISDN, 120, 200, 202, 208, 250, 265, 278, 305, Intel's Video System 200, 11 interactive multimedia, 246, 292 B channels, 201 interface, 443 Basic Rate Interface (BRI), 400 interference, 443 Basic Rate Interface Terminal Extender International Electrotechnical Commission (BRITE), 201 (IEC), 337 D channel, 201 Index D-channel, 413 ISO/IEC, 337 HO channels ISO/IEC 11172, 337, 342 and PRI, 207 ISO/IEC 13818, 344 H11, 207 ISO/IEC DIS 10918-1, 337 H12, 207 isochronous service, 224, 305, 446 LAPD, 207, 464 isos, 337 Multilink Point-to-Point Protocol (PPP), ITFS Antenna System,