What are Mobile Phones

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What are Mobile Phones?

• 1/10/07

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Cell Phone Parts
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SIM Card

• Subscriber Identity Module
• Stores on average 64 KB, but can range to 512 KB
• Information includes
• Unique Mobile ID
• Address Book, Text Messages
• Location Area Identity Last known location of
  the phone

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Cell Towers

• Raised transceivers cover up to 35 km, but often
  no more than a few blocks.
• Communicate to base station via cable or
  microwave transmission
• Network Switching Subsystem handles communication
  between mobiles and landline phones

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GSM Global System for Mobile Communications

• Leading standard for mobile manufacturers to
  enable phones to work across the world
• Operates in 4 different frequencies based on
  country.
• Handles transmission of cell services including
  voice and data.

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Learning about your phone

• Mobile phones vary a great deal in
• Software
• Memory
• Data Transmission
• Processing Speed
• Multimedia Components
• Visit your phone manufacturers website for
  specifications

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The Beginning

• Guglielmo Marconi developed wireless
  communication of electrical signal, at age 21.
• By 1901, Marconi had sent transoceanic
  transmissions
• Marconi later joined the Italian Fascist
  movement.
• Nikola Tesla holds the patent for radio
  transmission
• Despite holding numerous patents, Tesla died
  destitute in a New York Hotel.

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20th Century Transmission

• Ability to communicate across large distances is
  key to various industries.
• As technology dispersed, communication became
  more frequently used for social communications.
• From single line for a community to mobile phones
  for each person, each technology changes the
  practices of use.

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Current Status

• Cell tower map of Atlanta
• New phone technology UMTS, WiFi phones
• Move from voice to data
• New phone designs