Principles of Information Systems, Sixth Edition

Telecommunications and Networks

Chapter 6

Principles of Information Systems, Sixth Edition

Overview of Telecommunications Systems

Principles of Information Systems, Sixth Edition

Communications

Principles of Information Systems, Sixth Edition

Communications

Principles of Information Systems, Sixth Edition

Telecommunications

Principles of Information Systems, Sixth Edition

Telecommunications Media

Principles of Information Systems, Sixth Edition

Basic Communications Channel Characteristics

• Simplex channel• Half-duplex• Full-duplex channel

Principles of Information Systems, Sixth Edition

Bandwidth

• The range of frequencies that an electronic signal occupies on a given transmission medium.

Principles of Information Systems, Sixth Edition

Broadband

• Telecommunications in which a wide band of frequencies is available to transmit information, allowing more information to be transmitted in a given amount of time.

Principles of Information Systems, Sixth Edition

Shannon’s Fundamental Law of Information Theory

• The information carrying capacity of a channel is directly proportional to its bandwidth - the broader the bandwidth, the more information that can be carried.

Principles of Information Systems, Sixth Edition

Types of Media

• Twisted-Pair• Coaxial Cable• Fiber-Optic Cable• Microwave Transmission

Principles of Information Systems, Sixth Edition

Twisted-Pair Wire Cable

Principles of Information Systems, Sixth Edition

Coaxial Cable

Principles of Information Systems, Sixth Edition

Fiber Optic Cable

Principles of Information Systems, Sixth Edition

Microwave Transmission

Principles of Information Systems, Sixth Edition

Satellite Transmission

Principles of Information Systems, Sixth Edition

Cellular Transmission

Principles of Information Systems, Sixth Edition

Telecommunications Devices

Principles of Information Systems, Sixth Edition

Devices

• Modems:– Analog– Digital

• Special-purpose modems• Multiplexers • Front-end processors

Principles of Information Systems, Sixth Edition

Modems

Principles of Information Systems, Sixth Edition

Multiplexers

Principles of Information Systems, Sixth Edition

Front-End Processors

Principles of Information Systems, Sixth Edition

Carriers and Services

Principles of Information Systems, Sixth Edition

Carriers and Services

• Common carriers• Value-added carriers• Switched and dedicated lines• Private branch exchange (PBX)• Wide-area telecommunications service (WATS)• Phone and dialing services • Digital subscriber line (DSL)• T1 Carrier

Principles of Information Systems, Sixth Edition

Integrated Services Digital Network (ISDN)

Principles of Information Systems, Sixth Edition

Carriers and Services

Principles of Information Systems, Sixth Edition

Networks & Distributed Processing

Principles of Information Systems, Sixth Edition

Basic Processing Strategies

• Centralized processing• Decentralized processing• Distributed processing

Principles of Information Systems, Sixth Edition

Network Concepts and Considerations

• Network topology– Ring network– Bus network– Hierarchical– Star network– Hybrid network

• Network types– Local Area Networks– Wide Area Networks– International networks– Home and small business networks

Principles of Information Systems, Sixth Edition

Network Topology

Principles of Information Systems, Sixth Edition

Network Topology

Principles of Information Systems, Sixth Edition

Network Topology

Principles of Information Systems, Sixth Edition

Local Area Networks

Principles of Information Systems, Sixth Edition

Wide Area Networks

Principles of Information Systems, Sixth Edition

Home and Small Business Networks

Principles of Information Systems, Sixth Edition

Terminal-to-Host

Principles of Information Systems, Sixth Edition

File Server

Principles of Information Systems, Sixth Edition

Client/Server

Principles of Information Systems, Sixth Edition

Communications Software and Protocols

Principles of Information Systems, Sixth Edition

Communications Software

• Network operating systems (NOS)• Network management software

Principles of Information Systems, Sixth Edition

Communications Protocols

• Open Systems Interconnection (OSI) model• Transmission Control Protocol/Internet Protocol

(TCP/IP)• Systems Network Architecture (SNA)• Ethernet• Asynchronous Transfer Mode (TM)• Bluetooth

Principles of Information Systems, Sixth Edition

Open Systems Interconnection (OSI) Model

Principles of Information Systems, Sixth Edition

Open Systems Interconnection (OSI) Model

Principles of Information Systems, Sixth Edition

Network Interconnectivity Technology

Principles of Information Systems, Sixth Edition

Bridge, Routers, and Gateways

Principles of Information Systems, Sixth Edition

Telecommunications and Applications

Principles of Information Systems, Sixth Edition

Telecommunications and Applications

• Voice mail• Electronic software distribution• Telecommuting• Videoconferencing• Electronic data interchange (EDI)

Principles of Information Systems, Sixth Edition

Videoconferencing

Principles of Information Systems, Sixth Edition

Electronic Data Interchange (EDI)

Principles of Information Systems, Sixth Edition

Public Network Services

Principles of Information Systems, Sixth Edition

Summary• Communications - any process that permits

information to pass from a sender to one or more receivers

• Telecommunications media - twisted-pair wire cable, coaxial cable, and fiber-optic cable

• Modems - convert signals from digital to analog for transmission, then back to digital

• Ethernet - the most widely installed local area network (LAN) technology