k 403 incoming traffic 493, 497 GTP (gateway tunnelling protocol) incumbent operator 118, 133, 254, 217, 218, 282, 283, 325 255, 474 ingress label edge router (ingress LER) H.248 50, 89, 90, 97, 268, 274, 320, integrity 45, 47, 78, 160, 186-188, 387, 480 192, 199, 204, 207-209, 212, H.263 214, 218-220, 289, 392, 451, 452 H.323 79, 90, 97, 238, 267, 269, 271, intelligent network services 54, 71 281, 328, 354, 358, 387, 391, interactive class 162, 163, 165, 229, 392, 403, 404 HDSL 134, 357, 376 interior gateway routing protocol, (IGP) header compression 14, 75, 79, 166, 342, 343 236, 258, 484 internal rate of return (IRR) 145, 463, HE-VASP (home environment- 466, 469, 470 value-added service provider) international mobile 110, 286, 290, 417, 445 telecommunications-2000 HFC 378 (IMT-2000) 366 higher radio access network 361 Internet control message protocol HLR 56, 165, 245, 276, 278, 280, (ICMP) 53 394, 398, 402 Internet offload 255, 327, 474 home environment 110, 290, 291, Internet protocol security (IPsec) 92, 416, 417, 445 home location register (HLR) 165, 266, 303, 402 Internet service provider (ISP) 29, 110, 111, 227, 277, 327 home subscriber server (HSS) 386, interrogating CSCF (I-CSCF) 400, 401, 421 intrusion 32, 187, 206, 218, 267 399, 400, 402, 413, 419-421 11, 13, 18, 30, 44, 47, 53, 54, 56, HTTP 61, 88, 89, 94, 96, 169, 170, 58, 60, 61, 63, 65, 68, 75, 77, 78, 198, 204, 206, 214, 238, 243, 81, 88, 91, 92, 94, 95, 100, 106, 269, 275, 294, 392, 434, 461 111, 116, 118, 131, 145, 160, 161, hybrid fibre-coaxial (HFC) 378 169, 171, 174, 175, 177, 179, 180, 187-189, 195, 197-200, IBSP 32 203, 206-208, 210-216, 220, 206, 220 223, 224, 226, 227, 230-234, idle load 237, 238, 240-242, 245, 249, 53, 94 250, 254-256, 258, 268, IGP 342, 343 270-272, 275, 276, 278, I-mode 36, 121, 156, 158, 172 280-282, 286, 289, 290, 296, 78, 354, 362, 387, 397 299-301, 322, 325-327, 331, 56, 79, 83, 90, 95, 98, 112, 113, 332, 334-338, 340, 342-347, 165, 250, 258, 386, 390, 416, 349, 350, 352-355, 359, 360, 447, 490, 495, 496 362, 367