1. Landline communication
system

2. Overview
Introduction
Landline communication system.
Examples.

3. Introduction: Types of communication systems: 1-
Landline communication system 2-
Cellular and mobile communication system.

4. Types of communication systems: Landline communication system
Telephone
DSL
Cellular and mobile communication system
Mobile phone network

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

6. Telephone
Telephone
History
How Does it Work ?

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

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

9. How Telephone Works ?

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

11. 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.

12. How does it work ? I-
Overview
II-
Process

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

14. Process

15. 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.

16. 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.

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

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

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

20. The Splitter

21. 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.

22. The Splitter

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

24. References http://en.wikipedia.org/wiki/History_of_the_telephone