Communication and Technology (Revised)

Communication and Technology (Revised) - November 15, 2007...

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November 15, 2007 CLST311 Communication and Technology I. Intro a. Most popular means of communication that technology has created b. Thesis i. A majority of the public use a variety of reasonably new technologies as a necessary means of communication including such advances as the cellular phone, internet applications, and instant messaging. II. Cell Phones a. History i. Original break from house phones ii. 1843 – Michael Faraday 1. Studied to see if space could conduct electricity 2. Paved the way for cell phone idea iii. 1865 – Doctor Mahlon Loomis 1. First person to communicate through wireless atmosphere 2. Came up with the idea of transmitting and receiving messages through atmosphere as a conductor 3. Granted $50,000 for his research iv. 1876 – Alexander Graham Bell 1. Invention of the telephone v. 1880 – Nikolai Tesla 1. Invention of the radio vi. 1973 – Creation of Motorola (Martin Copper) 1. Took to New York to find investors vii. 1977 – First cell phone made in Chicago 1. 2,000 free cell phones given for free trial in attempt to promote the new invention viii. 1988 – Mass production of the ‘Bag Phone’ offered in only 54 countries world wide (38 US) ix. 1991 – Creation of the Analog cell phone b. Operation of the cell phone (how they function) i. Cell phones are complex radios 1. Combination of phone and radio ii. Frequencies 1. Full Duplex 2. The breakdown of a city into small cells which allows frequency reuse throughout a city which allows people to use their cell phone simultaneously without interruption because someone else is using their phone. (little wordy, will change) iii. Channels 1. A cell phone can work on 1,664 channels or more as opposed to a CB Radio which only has 40 channels. iv. Range 1
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November 15, 2007 CLST311 1. Cell phones operate within cells, and alternate cells as they the phone is in motion. 2. Based on service towers and providers, the range is determined which can be throughout a country or even globally c. Evolved features i. Text/Picture messaging ii. Internet iii. Email iv. Cameras/Camcorders v. Conference calling vi. Walkie-Talkies d. Human response i. More reachable 1. Parents have more control over children 2. Employees are more accessible by employers a. Company issued cell phones 3. Emergency use
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This note was uploaded on 04/21/2008 for the course CLST 311 taught by Professor Panos during the Spring '08 term at Towson.

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Communication and Technology (Revised) - November 15, 2007...

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