 225-229, 232, 233, 235, SMS-SC, 273-275, 278, 279, 281, 236, 240 nominal routeing, 225, 228, 229, SPR, 11, 21-23, 73, 91, 224 232,233 SPS, 131, 134, 135 optimal routeing, 226, 227, 235, SRB, 6, 33-35, 38, 110, 111 236, 240 SRS, 122, 131 SS7, 180 SSS, 121, 124, 125, 126, 201 STA (DIAMETER), 99, 101, 105 SAA (DIAMETER), 76, 81, 84, 85, S-TMSI, 128, 279 STN-SR, 147, 148, 260-262, 268, SAR (DIAMETER), 76, 81, 84, 85, 269, 272 248, 261 STR (DIAMETER), 99, 101, 105 SCC AS, 243, 244, 245, 246, 248- SUBSCRIBE, 3, 4, 18, 24, 28, 56, 61, 255, 261-263, 265, 266, 269-271 63, 64, 69, 71, 76, 82, 83, 128, 147, service centralization, 200, 243 148, 151, 158, 159, 187, 192, 224, service continuity, 257, 261, 263, 244, 247, 261, 262, 268, 279 265, 269, 271 synchronization signal, 121, 201 session description protocol (SDP), system information, 3, 33, 36, 38, 17, 60, 87, 149, 181, 250 113, 114, 122, 124-128 SGsAP, 273, 274, 276-284, 285, 287 SGSN, 218, 219, 220, 221, 244, 245, SIB, 2, 3, 9, 33, 51, 54, 83, 112, 113, TC-RNTI, 127-129, 131 114, 124, 126, 127, 128, 164, 170, TDD, 116-118, 125, 131, 135, 138- 171, 174, 176, 179, 218, 240, 258, 141, 144, 145 267, 271, 272 TDM, 173, 175, 178, 180, 183 SIGTRAN, 180, 183 TEID, 47, 49-52, 73-75, 92, 202, SIMO, 120, 121 204-207, 209-214, 216 SIP (request), 16 TIP, 25, 58, 82, 109, 111-116, 120, SIP (response), 102, 177, 228, 250, 121, 130, 142, 143, 151, 158, 165, 174,178 VoLTE and ViLTE TIR, 151, 158, 159 ULA (DIAMETER), 70 TM, 16, 17, 34, 49, 58, 112, 128, ULR (DIAMETER), 70 150, 175, 268, 279 UL-SCH, 34, 35, 110, 114, 123 TMSI, 128, 268, 279 UMTS, 37, 223, 255, 257, 258, 267, TRF, 226, 227, 236-241 transmission mode, 120, 137-141 URN, 29, 43, 56, 57, 63, 106, 108, transport channel, 34, 35, 109, 110, 144, 150, 166, 175, 191, 251, 282 114, 122, 123, 125 user agent (UA), 13, 16, 53, 54, 77, uplink, 42, 86, 110, 114, 115, 117, 150, 181, 244 118, 122, 123, 126, 130-132, user equipment (UE), 2, 9, 27, 69, 135, 137-141, 143, 144, 200, 109, 243 277-282 USIM, 71 TrGW, 192, 193, 195-197, 225, 22