(TELECOMMUNICATIONS AND NETWORKS (Chapter 8
اسلاید 1: 8TELECOMMUNICATIONSAND NETWORKSChapter
اسلاید 2: What technologies are used in telecommunications systems? What telecommunications transmission media should our organization use? How should our organization design its networks?Essentials of Management Information SystemsChapter 8 Telecommunications and NetworksOBJECTIVES
اسلاید 3: What alternative network services are available to our organization? What telecommunications applications can be used for electronic commerce and electronic business?Essentials of Management Information SystemsChapter 8 Telecommunications and NetworksOBJECTIVES
اسلاید 4: Managing LANs Managing bandwidthMANAGEMENT CHALLENGESEssentials of Management Information SystemsChapter 8 Telecommunications and Networks
اسلاید 5: THE TELECOMMUNICATIONS REVOLUTIONTelecommunications: Communication of information by electronic means The marriage of computers and communications: The 1996 Telecommunications Deregulation and Reform ActThe Information Superhighway: High-speed digital telecommunications networks, accessible by the general publicEssentials of Management Information SystemsChapter 8 Telecommunications and Networks
اسلاید 6: COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEMComputers to process informationTerminals or any input/output devices that send or receive dataCommunications processorsCommunications softwareEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksTelecommunications System Components
اسلاید 7: COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEMEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksComponents of a Telecommunications SystemFigure 8-1
اسلاید 8: COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEMTransmit informationEstablish interface between sender and the receiverRoute messages along most efficient pathsEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksFunctions of Telecommunications Systems
اسلاید 9: COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEMPerform elementary processing of information Perform editorial tasks on data Convert message speed or formatControl flow of informationEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksFunctions of Telecommunications Systems
اسلاید 10: COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEMAnalog signal Continuous waveform Passes through communications mediumUsed for voice communicationsEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksTypes of Signals: Analog and Digital
اسلاید 11: COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEMDigital signalDiscrete waveformTransmits data coded into two discrete states as 1-bits and 0-bitsUsed for data communicationsModemTranslates computer’s digital signals into analog and vice versaEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksTypes of Signals: Analog and Digital
اسلاید 12: COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEMEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksFunctions of the ModemFigure 8-2
اسلاید 13: COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEMTwisted wire: Telephone systemsCoaxial cable: Cable televisionFiber optics and optical networks: Dense wave division multiplexing (DWDM)Essentials of Management Information SystemsChapter 8 Telecommunications and NetworksCommunications Channels
اسلاید 14: COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEMWireless transmission: Microwave, Satellites, Paging systems, Cellular telephones, Personal communication Services, Personal digital assistants, Mobile data networksTransmission: Baud, bandwidthEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksCommunications Channels
اسلاید 15: COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEMEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksFrequency Ranges for Communications Media and DevicesFigure 8-3
اسلاید 16: Essentials of Management Information SystemsChapter 8 Telecommunications and NetworksFigure 8-4COMMUNICATIONS NETWORKSAmoco’s Satellite Transmission System
اسلاید 17: COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEMFront-end processor: Manages communications for the host computerConcentrator: Collects and temporarily stores messagesController: Supervises communication trafficMultiplexer: Enables single communication channel to carry data transmissions Essentials of Management Information SystemsChapter 8 Telecommunications and NetworksCommunications Processors and Software
اسلاید 18: COMMUNICATIONS NETWORKSStar Network: All computers and other devices are connected to a central host computer Bus Network: Links a number of computers by a single circuit Ring Network: All computers are linked by a closed loop Essentials of Management Information SystemsChapter 8 Telecommunications and NetworksNetwork Topologies
اسلاید 19: Essentials of Management Information SystemsChapter 8 Telecommunications and NetworksA Star Network TopologyCOMMUNICATIONS NETWORKSFigure 8-5
اسلاید 20: Essentials of Management Information SystemsChapter 8 Telecommunications and NetworksA Bus Network TopologyCOMMUNICATIONS NETWORKSFigure 8-6
اسلاید 21: Essentials of Management Information SystemsChapter 8 Telecommunications and NetworksA Ring Network TopologyCOMMUNICATIONS NETWORKSFigure 8-7
اسلاید 22: Private Branch ExchangesCentral switching system Handle firm’s voice and digital communicationsEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksPrivate Branch Exchanges, Local Area Networks (LANs), and Wide Area Networks (WANs)COMMUNICATIONS NETWORKS
اسلاید 23: Local Area NetworksTelecommunication networkRequire its own dedicated channels Encompass a limited distanceGateway, router, Network Operating System (NOS), peer-to-peerEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksPrivate Branch Exchanges, Local Area Networks (LANs), and Wide Area Networks (WANs)COMMUNICATIONS NETWORKS
اسلاید 24: Essentials of Management Information SystemsChapter 8 Telecommunications and NetworksCOMMUNICATIONS NETWORKSA Local Area Network (LAN)Figure 8-8
اسلاید 25: Wide Area Networks (WANs)Telecommunication networkSpan large geographical distanceConsist of variety of cable, satellite, and microwave technologiesSwitched lines, dedicated linesEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksPrivate Branch Exchanges, Local Area Networks (LANs), and Wide Area Networks (WANs)COMMUNICATIONS NETWORKS
اسلاید 26: Value-Added Networks (VANs)Private, multipath, data-only, third-party-managed network Other Network ServicesPacket switching, Frame Relay, Asynchronous transfer mode (ATM)Integrated Services Digital Network (ISDN), Digital subscriber line (DSL), Cable modems, T1 line, BroadbandEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksNetwork Services and Broadband TechnologiesCOMMUNICATIONS NETWORKS
اسلاید 27: Essentials of Management Information SystemsChapter 8 Telecommunications and NetworksPacked-Switched Networks and Packet CommunicationsFigure 8-9COMMUNICATIONS NETWORKS
اسلاید 28: Converged networkNetwork with technology Enables voice and data to run over a single networkUnified messagingSystem combining voice messages, email, and fax Essentials of Management Information SystemsChapter 8 Telecommunications and NetworksNetwork ConvergenceCOMMUNICATIONS NETWORKS
اسلاید 29: Electronic Mail and GroupwareE-mail: Eliminates telephone tag and costly long-distance telephone chargesGroupware: Enables work groups at different locations to participate in discussion forums and work on shared documents and projectsEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksElectronic Commerce and Electronic Business TechnologiesCOMMUNICATIONS NETWORKS
اسلاید 30: Voice Mail and FaxVoice mail: Digitizes spoken message and transmits it over a networkFax: Digitizes and transmits documents over telephone linesEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksElectronic Commerce and Electronic Business TechnologiesCOMMUNICATIONS NETWORKS
اسلاید 31: Teleconferencing, data conferencing, and videoconferencingTeleconferencing: Ability to confer with a group of people simultaneouslyData conferencing: Two or more users can edit and modify data files simultaneouslyVideoconferencing: Participants are able to see each other over video screensEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksElectronic Commerce and Electronic Business TechnologiesCOMMUNICATIONS NETWORKS
اسلاید 32: Digital information services, distance learning and E-LearningDistance learning: Education or training delivered over a distance to individuals in one or more locationsE-learning: Instruction delivered online using the Internet or private networksEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksElectronic Commerce and Electronic Business TechnologiesCOMMUNICATIONS NETWORKS
اسلاید 33: Direct computer-to-computer exchange between two organizations of standard business transaction documentsEssentials of Management Information SystemsChapter 8 Telecommunications and NetworksElectronic Data InterchangeCOMMUNICATIONS NETWORKS
اسلاید 34: Essentials of Management Information SystemsChapter 8 Telecommunications and NetworksElectronic Data Interchange (EDI)Figure 8-10COMMUNICATIONS NETWORKS
اسلاید 35: 8TELECOMMUNICATIONSAND NETWORKSChapter
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