Educational Telecommunications

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Educational Telecommunications

• by
• Gerald Knezek
• Professor of Technology Cognition
• University of North Texas

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Telecommunications

• Tele - at a distance
• Communications - exchange of information

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Telecommunications

• Communications over distance or time

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Modes of Communication

• Simplex
• broadcast radio, TV
• Half Duplex
• speakerphone
• Full Duplex
• telephone

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Types of Telecommunication Systems

• Audio
• Video
• Data
• Combinations

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Audio

• Broadcast Radio
• Two-way Radio
• Audio Teleconferencing

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Video

• Broadcast Television
• Slow-Scan TV
• Two-Way Videoconferencing

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Data

• Computer-Mediated Communication
• Asynchronous (E-mail)
• Synchronous (Chat Mode)
• Computer Conferencing
• Computer-Supported Collaborative Work

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Required Data Comm. Equipment

• Computer
• Modem
• (modulator - demodulator)
• Terminal Emulation Software
• Phone Line

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Combination Data/Graphics Systems

• Information Retrieval Services
• interactive access to (primarily) text
• Source, Compuserve, Dow Jones
• Teletext
• one-way text and graphics Prestel (UK)
• stock market quotations
• severe weather alert

(continued)
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• (continued)
• Videotex
• Prodigy, U.S. Videotel
• two-way interactive retrievel of text and
  graphics
• Audiographics
• text, sound and graphics via computer workstation
• electronic blackboard

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Teleconferencing

• Audio
• Video
• includes audio

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Distance Education

• Distance Learning
• Distance Teaching

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Distance Education Delivery Systems

• LIFT Model
• Live, Interactive, Facilitated TV
• Satellite Based
• TI-IN
• (continued)

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• (continued)
• Modem Courses
• Submit homework via Email
• TCJC
• Two-Way Audio/Video
• video teleconference
• UNT PDC, VTEL

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Computer Networks

• Cluster
• less than 30 machines
• near to each other
• LAN
• local area network
• less than 9 miles

(continued)
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• (continued)
• MAN
• metropolitan area network
• less than 50 miles
• WAN
• wide area network
• greater than 50 miles

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Internet

• Network of networks
• All use TCP/IP protocols

(continued)
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• (continued)
• Support basic services
• Email (SMTP)
• Telnet
• FTP
• Supports numerous servers and clients
• JOVE Unix system at UNT, Tenet in Austin
• Listservs
• Gopher, WWW, etc.

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Simple Curricular Enhancements via Email

• NGS Kids Network
• ATT Learning Network
• TERCs Global Lab
• TCETs Air/Water Project

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The End