itc20 finals mis8ch08
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8.1 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
88
TELECOMMUNICATIONSTELECOMMUNICATIONS
ANDAND
NETWORKSNETWORKS
Chapter
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8.2 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
What technologies are used inWhat technologies are used in
telecommunications systems?telecommunications systems?
What telecommunications transmissionWhat telecommunications transmission
media should our organization use?media should our organization use?
How should our organization design itsHow should our organization design itsnetworks?networks?
OBJECTIVES
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8.3 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
What alternative network services areWhat alternative network services are
available to our organization?available to our organization?
What telecommunications applicationsWhat telecommunications applications
can be used for electronic commerce andcan be used for electronic commerce and
electronic business?electronic business?
OBJECTIVES
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8.4 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
Managing LANsManaging LANs
Managing bandwidthManaging bandwidth
MANAGEMENT CHALLENGES
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8.5 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEM
Telecommunications:Telecommunications:
Communication of information byCommunication of information by
electronic meanselectronic means
Includes digital data transmissionIncludes digital data transmission
as well as voice transmissionas well as voice transmission
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8.6 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEM
Computers to process informationComputers to process information
Terminals or any input/output devicesTerminals or any input/output devicesthat send or receive datathat send or receive data
Communications processorsCommunications processors
Communications softwareCommunications software
Telecommunications System Components
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8.7 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEM
Components of a Telecommunications System
Figure 8-1
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8.9 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEM
Perform elementary processing ofPerform elementary processing of
informationinformation
Perform editorial tasks on dataPerform editorial tasks on data
Convert message speed or formatConvert message speed or format
Control flow of informationControl flow of information
Functions of Telecommunications Systems
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8.11 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEM
Digital signalDigital signal
Discrete waveformDiscrete waveform
Transmits data coded into twoTransmits data coded into twodiscrete states as 1discrete states as 1--bits and 0bits and 0--bitsbits
Used for data communicationsUsed for data communications
ModemModem Translates computers digitalTranslates computers digital
signals into analog and vice versasignals into analog and vice versa
Types of Signals: Analog and Digital
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8.12 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEM
Functions of the Modem
Figure 8-2
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8.13 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEM
Twisted wire:Twisted wire: Telephone systemsTelephone systems
Coaxial cable:Coaxial cable: Cable televisionCable television
Fiber optics and optical networks:Fiber optics and optical networks:
Dense wave division multiplexing (DWDM)Dense wave division multiplexing (DWDM)
Communications Channels
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8.14 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEM
Wireless transmission:Wireless transmission: Microwave,Microwave,Satellites, Paging systems, CellularSatellites, Paging systems, Cellulartelephones, Personal communicationtelephones, Personal communication
Services, Personal digital assistants,Services, Personal digital assistants,Mobile data networksMobile data networks
Transmission speed:Transmission speed: Baud,Baud,bandwidthbandwidth
Communications Channels
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8.15 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEM
Frequency Ranges for CommunicationsMedia and Devices
Figure 8-3
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8.16 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
Figure 8-4
COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEM
Amocos Satellite Transmission System
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8.17 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
COMPONENTS AND FUNCTIONS OF A TELECOMMUNICATIONS SYSTEM
FrontFront--end processor:end processor: ManagesManagescommunications for the host computercommunications for the host computer
Concentrator:Concentrator: Collects and temporarilyCollects and temporarilystores messagesstores messages
Controller:Controller: Supervises communicationSupervises communicationtraffictraffic
Multiplexer:Multiplexer: Enables singleEnables singlecommunication channel to carry datacommunication channel to carry datatransmissionstransmissions
Communications Processors and Software
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8.18 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
COMMUNICATIONS NETWORKS
Star Network:Star Network: All computers and otherAll computers and otherdevices are connected to a central hostdevices are connected to a central hostcomputercomputer
Bus Network:Bus Network: Links a number ofLinks a number ofcomputers by a single circuitcomputers by a single circuit
Ring Network:Ring Network: All computers are linkedAll computers are linkedby a closed loopby a closed loop
Network Topologies
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8.19 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
A Star Network Topology
COMMUNICATIONS NETWORKS
Figure 8-5
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8.20 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
A Bus Network Topology
COMMUNICATIONS NETWORKS
Figure 8-6
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8.21 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
A Ring Network Topology
COMMUNICATIONS NETWORKS
Figure 8-7
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8.22 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
Private Branch ExchangesPrivate Branch Exchanges
Central switching systemCentral switching system
Handle firms voice and digitalHandle firms voice and digital
communicationscommunications
Private Branch Exchanges, Local Area Networks (LANs),
and Wide Area Networks (WANs)
COMMUNICATIONS NETWORKS
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8.23 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
Local Area NetworksLocal Area Networks
Require their own dedicated channelsRequire their own dedicated channels
Encompass a limited distanceEncompass a limited distance
Gateway, router, Network OperatingGateway, router, Network Operating
System (NOS), peerSystem (NOS), peer--toto--peerpeer
Private Branch Exchanges, Local Area Networks (LANs),
and Wide Area Networks (WANs)
COMMUNICATIONS NETWORKS
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8.24 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
COMMUNICATIONS NETWORKS
A Local Area Network (LAN)
Figure 8-8
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8.25 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
Wireless LANsWireless LANs
WiWi--Fi (802.11b) standard: Up to 11Mbps,Fi (802.11b) standard: Up to 11Mbps,low cost, highlow cost, high--speed mobile Internetspeed mobile Internetaccess, links work groupsaccess, links work groups
Bluetooth standard: Up to 720 Kbps,Bluetooth standard: Up to 720 Kbps,small personal area networkssmall personal area networks
Private Branch Exchanges, Local Area Networks (LANs),
and Wide Area Networks (WANs)
COMMUNICATIONS NETWORKS
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8.26 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
Wide Area Networks (WANs)Wide Area Networks (WANs)
Span large geographical distanceSpan large geographical distance
Consist of variety of cable, satellite, andConsist of variety of cable, satellite, andmicrowave technologiesmicrowave technologies
Switched lines, dedicated linesSwitched lines, dedicated lines
Private Branch Exchanges, Local Area Networks (LANs),
and Wide Area Networks (WANs)
COMMUNICATIONS NETWORKS
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8.27 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
ValueValue--Added Networks (VANs)Added Networks (VANs)
Private, multipath, dataPrivate, multipath, data--only, thirdonly, third--partyparty--managedmanagednetworknetwork
Other Network ServicesOther Network Services
Packet switching, Frame Relay, AsynchronousPacket switching, Frame Relay, Asynchronoustransfer mode (ATM)transfer mode (ATM)
Integrated Services Digital Network (ISDN), DigitalIntegrated Services Digital Network (ISDN), Digitalsubscriber line (DSL), Cable modems, T1 linesubscriber line (DSL), Cable modems, T1 line --BroadbandBroadband
Network Services and Broadband Technologies
COMMUNICATIONS NETWORKS
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8.28 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
Packed-Switched Networks and Packet
Communications
Figure 8-9
COMMUNICATIONS NETWORKS
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8.29 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
Converged networkConverged network
Enables voice, video and data to runEnables voice, video and data to run
over a single networkover a single network
Unified messagingUnified messaging
System combining voice messages,System combining voice messages,
email, and faxemail, and fax
Network Convergence
COMMUNICATIONS NETWORKS
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8.30 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
Electronic Mail and GroupwareElectronic Mail and Groupware
EE--mail:mail: Eliminates telephone tag andEliminates telephone tag andcostly longcostly long--distance telephone chargesdistance telephone charges
Groupware:Groupware: Enables work groups atEnables work groups atdifferent locations to participate indifferent locations to participate in
discussion forums and work on shareddiscussion forums and work on shared
documents and projectsdocuments and projects
Electronic Commerce and Electronic Business Technologies
ELECTRONIC COMMERCE AND ELECTRONIC BUSINESS TECHNOLOGIES
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8.31 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
Voice Mail and FaxVoice Mail and Fax
Voice mail:Voice mail: Digitizes spoken messageDigitizes spoken messageand transmits it over a networkand transmits it over a network
Fax:Fax: Digitizes and transmits documentsDigitizes and transmits documentsover telephone linesover telephone lines
Electronic Commerce and Electronic Business Technologies
ELECTRONIC COMMERCE AND ELECTRONIC BUSINESS TECHNOLOGIES
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8.33 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
Digital information services, distanceDigital information services, distance
learning and Elearning and E--LearningLearning
Distance learning:Distance learning: Education or trainingEducation or trainingdelivered over a distance to individuals indelivered over a distance to individuals in
one or more locationsone or more locations
EE--learning:learning: Instruction delivered onlineInstruction delivered onlineusing the Internet or private networksusing the Internet or private networks
Electronic Commerce and Electronic Business Technologies
ELECTRONIC COMMERCE AND ELECTRONIC BUSINESS TECHNOLOGIES
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8.34 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
Direct computerDirect computer--toto--computer exchangecomputer exchange
between two organizations of standardbetween two organizations of standard
business transaction documentsbusiness transaction documents
Electronic Data Interchange (EDI)
ELECTRONIC COMMERCE AND ELECTRONIC BUSINESS TECHNOLOGIES
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8.35 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks
Electronic Data Interchange (EDI)
Figure 8-10
ELECTRONIC COMMERCE AND ELECTRONIC BUSINESS TECHNOLOGIES
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8.36 2004 by Prentice Hall
Management Information Systems 8/eManagement Information Systems 8/eChapter 8 Telecommunications and NetworksChapter 8 Telecommunications and Networks88
TELECOMMUNICATIONSTELECOMMUNICATIONS
ANDAND
NETWORKSNETWORKS
Chapter
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