CECS 5400

Educational Telecommunications

Summer 2006

Key Terms and Concepts


  • Serial
  • Synchronous
  • Asynchronous
  • Simplex
  • Half Duplex
  • Full Duplex
  • Originate
  • Answer
  • Echo On (Local Ec)
  • Echo Off (no echo)
  • binary code
  • start bit
  • stop bit(s)
  • data bits
  • parity
  • baud
  • bits per second
  • Carrier
  • Bell 103
  • Bell 212
  • Bell 202
  • CCITT V.22bis
  • BBS
  • TTY
  • VT100
  • ANSI
  • Handshaking
  • timed delay
  • character prompt
  • XON - XOFF
  • log file
  • upload (transmit)
  • download (capture)
  • Video Conferencing
  • uplink
  • downlink
  • Radio Frequency Spectrum
  • ELF
  • VF
  • VLF
  • LF
  • MF
  • HF
  • VHF
  • UHF
  • SHF
  • EHF
  • bandwidth
  • kilohertz
  • megahertz
  • gigahertz
  • transponder
  • geostationary
  • polar orbit
  • scan lines
  • video lines
  • video retrace (video blanking)
  • PAL
  • WAN
  • MAN
  • LAN
  • Cluster
  • Broadband
  • Baseband
  • Narrow Band
  • Fiber Optic
  • Ribbon Cable
  • Twisted Pair
  • Coaxial Cable
  • Microwave
  • Transponder
  • Acoustic Coupler
  • Topology
  • Star
  • Bus
  • Ring
  • Contention Method
  • Carrie Sense
  • Token PasFile Server
  • ISO OSI
  • Modem
  • Parallel
  • Serial
  • Synchronous
  • Asynchronous
  • Simplex
  • Half Duplex
  • Full Duplex
  • Originate
  • Answer
  • Echo On (Local Echo


1. How may geostationary satellites would be required to cover the entire earth ? Where would you locate them and why ?
 
 
 
 
 
 
 
 
 
 

2. Suppose someone from Honolulu connects to ourfrom Honolulu connects to ourm Honolulu connects to our VAX in Denton via phone line. How long will it take for a character the person types to appear on his/her screen.
 
 
 
 
 
 
 
 
 
 

3. Explain the relationship between the terms azimuth, elevation, longitude, and latitude. How are they used to decide where to pointude. How are they used to decide where to point a satellite dish ?
 
 
 
 
 
 

4. Suppose you are the minister of education in Gondawannaland. Your job is to decide what kinds of telecommunication systems should be made available to students in education.

1) select five (5) available alternatives and 2) describe why each would or would not be recommended by you. Limit your answer to this page.
 
 
 
 

5. The following message was transmitted over an asychronous communication line with the settings 7,E,1asynchronous communication line with the settings 7,E,1. The order of transmission is (left to right) start bit, parity bit, data bits (high order first), stop bit(s). Decipher the message.
 
 

1010100111111100111111010100111