Download

768 INDEXData link connections, Digital SubscriberSignaling System No. 1 (DSS1), 237–238LAPD supervision of, 242–243Data link layer protocolsaccess systemsGR-303 standard, 133–134V5.2 standard, 149Digital Subscriber Signaling System No. 1(DSS1), 237–246control fields, 239–240data link connections, 237–238supervision of, 242–243frame format, 238–239frame types, 239SABME, DISC, DM, and UA frames, 244TEI management, 244–246transfer modes, 241–242GSM cellular system, A interface, 369packet networks, 637V5.1 standard, 141–143Data networks, defined, 1Data rates, cdma2000 air interface, 411,421–422Data streams, cellular mobile networks, onforward control channels (FOCC), 338Data terminal equipment (DTE), DigitalSubscriber Signaling System No. 1 (DSS1),231–232Data transfer, connection-oriented SignalingConnection Control Part (SCCP), 485Data transmission, analog circuits, 19D-channel messages. See also Link AccessProtocol for D-channel (LAPD)Digital Subscriber Signaling System No. 1(DSS1) and, 233data link connections, 237–238V5.1 standard, 140–147Deactivationcall screening, advanced intelligent networks,550–551cellular mobile networks, updating on,373–374Decoding operations, code-division multipleaccess (CDMA) networks, direct sequencecoding, 391–392De-encapsulation, packet-based communication,639–640Default directory number, DSS1protocol,subscription-parameter groups, 265Delayed acknowledgments, signaling linkmanagement, MTP protocol, 181Descriptors, Gateway Control Protocol (GCP),694Destination Local Reference (DLR), SignalingConnection Control Part (SCCP), 473connection-oriented service, 486Destination point code (DPC)MTP level 3 message format, 185Telephone User Part (TUP) protocol, messagestructure, 202Destinations, digit analysis, and routing, 13–14automatic rerouting, 17inter-LATA call routing, 16–17intra-LATA call routing, 14–15Destination transaction identifier (DTID),Transaction Capabilities Application Part(TCAP), 511Dialing plancustomized, 73international numbers, 10overview, 71public office, 71–72Dialog-control APDUs, Transaction CapabilitiesApplication Part (TCAP), 503, 506DialogsSession Initiation Protocol (SIP), 682–683Transaction Capabilities Application Part(TCAP), 499–502Dial-toneintraexchange call signaling, 55–56properties of, 64–65Differential phase-shift keying (DPSK), datatransmission, analog circuits, 19Differential quaternery phase-shift keying(DQPSK), IS-54 cellular system, 357Differential service (DiffServ), Voice overInternet Protocol and, 652Digital Access Signaling System (DASS),British Telecom National User Partprotocol, 225–226DigitalChannelData parameter, IS-MAP, 603Digital circuits, circuit multiplicationequipment, 33–34Digital color code (DCC)AMPS overhead parameter messageformat, 345cellular mobile networks, mobile controlmessage parameter, 350, 352Digital connectivity, Telephone User Part (TUP)protocol, 201, 217, 219Digital cross-connect system, Message TransferPart (MTP) protocol, MTP1, 169–170Digital line concentrators (DLCs), accessnetworks, 38–40Digital loop carriers, access networks, 38–40Digital multiplexed echo cancelers, 31