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Landline communication system PowerPoint Presentation
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Landline communication system

Landline communication system

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Landline communication system

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  1. Landline communication system

  2. Overview • Introduction • Landline communication system. • Examples.

  3. Introduction: Types of communication systems:

  4. What is a Landline? • A landline is a physical connection between two devices. • Example on a Landline: • Landline Phone (metal wire or fiber cable)

  5. Telephone

  6. History Of Telephone Alexander Graham inventing the first practical telephone. Thomas Edison, invented the carbon microphone which produced a strong telephone signal

  7. Bell on the telephone in New York (calling Chicago) in 1892

  8. How Telephone Works ?

  9. DSL -What is it ? - How does it work ? - What are the advantages and disadvantages ?

  10. What is DSL ? • DSL stands for Digital Subscriber Line. • It is a technology that brings huge data and information to homes and small businesses over ordinary telephone lines. • Different variations of DSL, such as ADSL, HDSL, IDSL, VDSL and RADSL.

  11. How does it work ?

  12. OVERVIEW • How is it connected ? • Speed Range. (from 144 Kb to 1.5 Mb per second)

  13. Process

  14. Advantages • DSL does not tie up the phone line. • Higher speed. • DSL doesn't necessarily require new wiring. • Some companies that offers DSL will usually provide the modem as part of the installation.

  15. Disadvantages - The farther you are from the central office, the slower your connection is. As you move away from the central office, more distortion enters the line and the signal deteriorates. - The connection is faster for receiving data than it is for sending data over the Internet. - The service is not available everywhere.

  16. Dial-up and DSL signals • Using Dial-up for internet. • Interfere with phone calls. Why ? • Slow. Why?

  17. Dial-up • Originally designed to carry “Speech”. • 300Hz to 3.4kHz • In one wire: • Phone call data + Internet data = ? NOISE

  18. DSL • Originally designed to carry “Data”. • 25kHz to 1.1MHz. • In one wire: • Phone call data + Internet data = ? BUT IN DIFFERENT FREQUENCIES

  19. The Splitter

  20. The Splitter • One input and two outs device: • Phone output get. • DSL output get. • Phone output gat is a Low-pass filter: • It passes DC to 3.4kHz.

  21. The Splitter

  22. EE205 TermProject Supervision of : DR. SAMIR AL-GHADHBAN Workers on the project: - BASEM ALSHAHRANI - SAUD KHAIR - ABDULAZIZ ALSENAIDE

  23. References • http://en.wikipedia.org/wiki/History_of_the_telephone • https://www.youtube.com/watch?v=Koylq78LzoM • http://www.epanorama.net/documents/telecom/adsl_filter.html • http://www.wisegeek.com • http://www.netstartechnology.net/ • http://computer.howstuffworks.com • http://www.dslreports.com/faq/117 • http://www.pcworld.com/article/14129/article.html