I&I_4_11 - CHAPTER 4 TELECOMMUNICATIONS AND...

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CHAPTER 4 TELECOMMUNICATIONS AND NETWORKS
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Marina G. Erechtchoukova 2 Basic Definitions Telecommunications: the electronic transmission of signals for communications Telecommunications medium: anything that carries an electronic signal and interfaces between a sending device and a receiving device
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Marina G. Erechtchoukova 3 The Components of Telecommunications Systems Hardware: Sending/receiving unit: Computers, Telephones, Fax, Radio sets, TV sets … Telecommunications devices Telecommunications media Telecommunications network
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Marina G. Erechtchoukova 4 The Components of Telecommunications Systems ( cont… ) Communications software Communications protocols Communications applications: E-mail; Facsimile; EDI, EFT…. Communications provider
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Marina G. Erechtchoukova 5 The Components of Telecommunications Systems Sending Unit Telecommunications Device Telecommunications Device Communications Channels and Media Transmitter Receiver Receiving Unit
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Marina G. Erechtchoukova 6 Data and Signals Data Raw facts Static Signals Transmit data Dynamic Data and signals may be digital or analog
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Marina G. Erechtchoukova 7 Digital and Analog Data Analog data is represented as continuous waveform Example: audio tape Digital data is computer data – sequence of binary 0s and 1s: Example: data stored on the hard drive
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Marina G. Erechtchoukova 8 Analog vs. digital signals
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I&I_4_11 - CHAPTER 4 TELECOMMUNICATIONS AND...

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