Telecommunications and
Networks
Chapter 6
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Principles and Learning Objectives
• Effective communication is essential to
organizational success.
– Define the terms communication and
telecommunications and describe the components of
a telecommunications system.
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Principles and Learning Objectives
• An unmistakable trend of communications technology
is that more people are able to send and receive all
forms of information over greater distances at a faster
rate.
– Identify three basic types of communications media and
discuss the basic characteristics of each.
– Identify several types of telecommunications hardware
devices and discuss the role that each plays.
– Identify the benefits associated with a telecommunications
network.
– Name three distributed processing alternatives and discuss
their basic features.
– Define the term network topology and identify five
alternatives.
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Principles and Learning Objectives
• The effective use of telecommunications and
networks can turn a company into an agile,
powerful, and creative organization, giving it a
long-term competitive advantage.
– Identify and briefly discuss several
telecommunications applications.
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Overview of
Telecommunications Systems
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Communications
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Communications
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Telecommunications
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Telecommunications Media
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Basic Communications Channel
Characteristics
• Simplex channel
• Half-duplex
• Full-duplex channel
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Bandwidth
• The range of frequencies that an
electronic signal occupies on a given
transmission medium.
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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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.
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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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.
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Types of Media
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•
•
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Twisted-Pair
Coaxial Cable
Fiber-Optic Cable
Microwave Transmission
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Twisted-Pair Wire Cable
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Coaxial Cable
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Fiber Optic Cable
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Microwave Transmission
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Satellite Transmission
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Cellular Transmission
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Telecommunications
Devices
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Devices
• Modems:
– Analog
– Digital
• Special-purpose modems
• Multiplexers
• Front-end processors
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Modems
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Multiplexers
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Front-End Processors
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Carriers and Services
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Carriers and Services
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•
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•
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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
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Integrated Services Digital
Network (ISDN)
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Carriers and Services
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Networks & Distributed
Processing
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Basic Processing Strategies
• Centralized processing
• Decentralized processing
• Distributed processing
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Network Concepts and
Considerations
• Network topology
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Ring network
Bus network
Hierarchical
Star network
Hybrid network
• Network types
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Local Area Networks
Wide Area Networks
International networks
Home and small business networks
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Network Topology
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Network Topology
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Network Topology
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Local Area Networks
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Wide Area Networks
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Home and Small Business Networks
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Terminal-to-Host
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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File Server
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Client/Server
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Communications Software and
Protocols
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Communications Software
• Network operating systems (NOS)
• Network management software
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Communications Protocols
• Open Systems Interconnection (OSI) model
• Transmission Control Protocol/Internet Protocol
(TCP/IP)
• Systems Network Architecture (SNA)
• Ethernet
• Asynchronous Transfer Mode (TM)
• Bluetooth
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Open Systems Interconnection (OSI)
Model
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Open Systems Interconnection (OSI)
Model
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Network Interconnectivity
Technology
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Bridge, Routers, and Gateways
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Telecommunications and
Applications
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Telecommunications and
Applications
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•
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Voice mail
Electronic software distribution
Telecommuting
Videoconferencing
Electronic data interchange (EDI)
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Videoconferencing
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Electronic Data Interchange (EDI)
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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Public Network Services
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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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
MSIS 110: Introduction to Computers; Instructor: S. Mathiyalakan
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