d ISDN, 123 requirements for, 391 cable modem, 513-521 Strowger switch, 89-90 cognitive radio, 693 STS (Synchronous Transport Signal), 126 DTV, 402-409 Stub area (SA), 260 Ethernet, 179-180 Subdermal personal verification technology, xlii Frame Relay, 221-222 Subnetting, 274 IEEE 802.11x, 642 Subscription locator function (SLF), IMS, 424 Internet, 248 Subscription VOD (SVOD), 521, 522 Interplanetary Internet, 304 Subsplit systems, 510 IP voice, 324-325 Super 3G, 611-612 LAN, 175, 178 Supervisory signals, 129-130 multiservice edge, 436-437 Surgical training, with teleimmersion, 1 organizations, 37-40 Surveillance, and IPT, 315 PDH, 115 SVCs (switched virtual circuits), 10, 225-228 PKI, 380 SVOD (subscription VOD), 521, 522 VoFR compression, 228 Switched digital access, 206 voice compression, 119-120 Switched Ethernet, 184-185 VPN, 358 Switched networks, 11, 85 wireless HAN, 541-542 Switched services, PSTN, 109 Star topology, 187, 673 Switched virtual circuits (SVCs), 10, 225-228 Index Switches overview of, 676-677 ATM networks, 230 privacy issues, 681-682 IP, 198-200, 240-241 Tail circuits, 25 LAN, 189-191 Tandem office, 113 VPLS, 373 Tandem switch, 8 Switching, defined, 86 TAPI (Telephony Applications Programming Inter- Switching modes face), 319 circuit switching, 87-92 Taps, DSL, 496 connection-oriented networks, 84-85 Tbps (terabits per second), 99, 457 defined, 84 TBRPF (Topology Broadcast Based on Reverse-Path overview of, 7-8, 86-87 Forwarding), 655 packet switching, 92-100 TCP/IP (Transmission Control Protocol/Internet Switching nodes, PSTN, 111-112 Protocol) Symbol rate, 156 four-layer reference model, 168-170 Symmetric encryption, 376-377 Internet network architecture, 264-268 Symmetric High-Bit-Rate DSL (SHDSL), 50, 501-502 OSI model VS., 170-171 Symmetrical or Single-Line DSL (SDSL), 50, 501-502 packet switches and, 99 Synchronous Data Link Control (SDLC), 222 suite, 254-258 Synchronous Digital Hierarchy (SDH), 17 TCP (Transmission Control Protocol), 170, 255 Synchronous Digital Hierarchy/Synchronous O