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Introduction

Chapter 5 Communication Channels and Media. Introduction. Communication media is a path between the transmitter and the receiver Three types: conductive, optical cable, wireless. Chapter 5 Communication Channels and Media. 5.1 Conductive Media.

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Introduction

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  1. Chapter 5 Communication Channels and Media Introduction • Communication media is a path between the transmitter and the receiver • Three types: conductive, optical cable, wireless.

  2. Chapter 5 Communication Channels and Media 5.1 Conductive Media • The types of conductors used for networking are UTP, STP and Coaxial • UTP: contains several pair of wires • Uses RJ-45 or RJ-11 connectors • Divided into CAT-1 through CAT-5 • STP: improve the effect of noise.

  3. 5.1 Conductive Media Coaxial Cable • Used for transmitting high-speed information over long distances • ThinNet or 10Base2: RG-58 (BNC connector) • ThickNet or 10Base5: RG-11 (DIX connector) • CATV: RG-59.

  4. 5.1 Conductive Media ThinNet

  5. 5.1 Conductive Media ThickNet

  6. Chapter 5 Communication Channels and Media 5.2 Fiber-Optic Cable • Fiber-optic cable transfers information in the form of light • LED , ILD: convert a digital signal to an optical signal for transmitting information over optical cable • PIN : convert the light signals into electrical signals.

  7. 5.2 Fiber-Optic Cable Type of Fiber-Optic cable • SMF: use only one ray of the light source (ILD) • MMF: more than one light (LED) • MMF step index (Fig 5.7) • MMF grade index (Fig 5.8) • Connector: SC, ST, MT-RJ .

  8. Chapter 5 Communication Channels and Media 5.3 Wireless Transmission • Use microwave, radio, infrared light signals to transmit information • Terrestrial and Satellite System.

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