Landline communication

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Presentation transcript:

Landline communication system

Overview Introduction Landline communication system. Examples.

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

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

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

Telephone Telephone History How Does it Work ?

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

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

How Telephone Works ?

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

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.

How does it work ? I- Overview II- Process

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

Process

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.

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.

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

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

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

The Splitter

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.

The Splitter

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

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