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Introduction to Information SystemsEssentials for the Internetworked E-Business Enterprise

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C h a p t e r

James A. OBrien

6

Telecommunications

and

Networks

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Identify several major developments and trendsin the industries, technologies, and businessapplications of telecommunications andInternet technologies.

Provide examples of the business value ofInternet, intranet, and extranet applications.

Identify the basic components, functions, andtypes of telecommunications networks used in

business.

Explain the functions of major types oftelecommunications network hardware,software, media, and services.

Chapter Objectives

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Trends in Telecommunications

More electronic commerce, enterprise collaboration,online business operations and strategic advantage in markets

services, acce

Extensive Internet, interconnected local & globaldigital networks, improved transmission channels

Industry Trends

Technology Trends

Application Trends

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Telecommunications Strategic Capabilities

Overcome Geographic Barriers: Capture information aboutbusiness transactions from remote locations.

Overcome Time Barriers: Provide information to remote locations

immediately after it is requested.

Overcome Cost Barriers: Reduce the cost of more traditionalmeans of communications.

Overcome Structural Barriers: Support linkages for competitiveadvantage.

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Internet Applications

Surf andE-mail

Internet Chatand

Discussion Forums

Download andComputer

Search Engines

E-CommerceTransfer

Protocol (FTP)and Telnet

Popular Usesof the

Internet

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Business Value from e-Commerce Applications

Increase Customer Loyalty & Retention

Reduce the Cost of Doing Business

Generate New Revenue Sources

Attract New Customers

Deriving BusinessValue from e-CommerceApplications

Develop New Markets & Channels

Develop New Web-based Products

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Basic Components in a Telecommunications Network

TelecommunicationsSoftware

1

2 3

4

52

PCs, NCs,and OtherTerminals

ComputersTelecommunicationsChannels and Media

TelecommunicationsProcessors

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Wide Area Networks

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California Norway

Belgium

Pennsyl-vania

Manitoba

BritishColumbia

Chile

Ontario

JapanDominicanRepublic

WideAreaNetwork

WAN

El h Edi iJ A OB i S

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Local Area Networks

NetworkServer

SharedDatabase and

Software Packages

SharedPrinter

PCPC

PC PC PC

Internetwork Processor to Other Networks

El h Edi iJ A OB i I d i I f i S

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Other E-business Networks

Router

Intranet

Server

Host System

IntranetServer

The

Internet

Fire wall

Fire wall

RouterExtranet

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Client Server Networking

ClientSystems

Servers

Host Systems/Superservers

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Client/Server Networks and Network Computing

NetworkServer

Host System

Superserver

Client

User InterfaceApplication Processing

Application ControlDistributed Database

Central database control

Heavy duty processing

Server Server

NetPC

Browser-basedUser Interface

Web OSApplication Software

Application

DBMS

DB

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Telecommunications Communication Media

Twisted Pair

Coaxial Cable

Fiber Optics

TerrestrialMicrowave

CommunicationSatellites

CellularTechnologies

Wireless LAN

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Telecommunications Processors and Software

Modems

Multiplexers

InternetworkProcessors

Switches

Routers

Hubs

Gateways

Fire walls

Network OperatingSystem

TelecommunicationsMonitor

Middleware Network Management

Software

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Network Topologies

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The Internets TCP/IP

Application orProcess Layer

Internet Protocol (IP)

Host-to-Host Transport Layer

Network Interface

Physical Layer

Application

LayerPresentation

Layer

SessionLayer

TransportLayer

NetworkLayer

Data LinkLayer

PhysicalLayer

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Chapter Summary

Organizations are becoming internetworkedenterprises that use the Internet, intranets, andother telecommunications networks to support e-business.

Telecommunications has entered a deregulatedand fiercely competitive environment with manyvendors, carriers, and services

A major trend is towards pervasive use of theInternet and its technologies to buildinterconnected enterprise and global networks.

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Chapter Summary (cont)

The major components of anytelecommunications network are:

Terminals,

Telecommunications processors,

Communication channels,

Computers, and

Telecommunications software.

There are several basic types of telecommnetworks, including wide area networks(WANs) and local area networks (LANs).

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Chapter Summary (cont)

Key telecommunications networkalternatives include telecommunicationsmedia, processors, software, channels, andarchitectures.