SWT4_CH05 - Chapter 5 Telecommunications, Wireless...

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Succeeding with Technology 4th ed> Telecommunications, Succeeding with Technology 4th ed> Telecommunications, Wireless & Please discontinue use of cell phone and turn off the ringer. n Fundamentals of Telecommunications n Networking Media, Devices, and Software Wireless Telecommunications Technologies Telecommunications, Wireless Technologies, and Computer Networks Chapter 5
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Succeeding with Technology 4th ed> Telecommunications, n Key Terms Fundamentals of Telecommunications
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Succeeding with Technology 4th ed> Telecommunications, Telecommunications n Telecommunications : refers to the electronic transmission and reception of signals for communications.
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Succeeding with Technology 4th ed> Telecommunications, Types of Signals n Digital Signal : transmits data using two discrete states of voltage: high and low. n Analog Signal : transmits sound using continuously varying levels of voltage.
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Succeeding with Technology 4th ed> Telecommunications, Signal Frequency n Frequency: the speed at which a signal changes from high to low. n Bandwidth : the range of signal frequencies that can be sent over a given medium at the same time. ¡ Often expressed as bits per second ¡ Broadband : typically 2 – 5 Mbps
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Succeeding with Technology 4th ed> Telecommunications, Broadband n Broadband or high-speed Internet refers to a connection that is always on or active, such as cable or DSL. The huge array of digital records maintained by modern hospitals, including patient records and digital images from X-rays, MRIs, and other medical procedures, requires broadband networks to transfer records between locations.
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Succeeding with Technology 4th ed> Telecommunications, Networking Media, Devices, and Software n Key Terms ¡ Twisted pair cable ¡ Coaxial cable
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Succeeding with Technology 4th ed> Telecommunications, Networking Media {103D104D-A843-4F B-A849-1F40A3F41830} Twisted Pair res covered with an insulating layer. {81A569 3-C8AE-4E2A-9C72-A8DB 9D2E19F} Coaxial cable onductive shield (usually a layer of foil or metal braiding), and a cover. {F3EC4FDE-F51 -4C32-A5B6-84B76A3DD9F2} Fiber Optic gether in a sheathing (a jacket), transmits signals with light beams.
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Succeeding with Technology 4th ed> Telecommunications, Radio Wave n A radio wave is an electromagnetic wave transmitted through an antenna at different frequencies.
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Succeeding with Technology 4th ed> Telecommunications, Radio Waves n Radio waves use differing frequencies to carry many types of information: http://electronics.howstuffworks.com/radio-spectrum1.htm ¡ ¡ ¡ Television Broadcasts ¡ Garage Doors Openers ¡ Baby Monitors ¡ Cordless Phones ¡ Cell Phones ¡ Radio Controlled Cars and Airplanes
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SWT4_CH05 - Chapter 5 Telecommunications, Wireless...

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