Cell+Phones

=Cell Phones=

DEFINITION
A mobile phone or mobile (also called cellphone and handphone) is an electronic device used for mobile telecommunications (mobile telephone, text messaging or data transmission) over a cellular network of specialized base stations known as cell sites.

HISTORY
1843- Michael Faraday strarts his studies that space can conduct electricity. 1865- A Virginia scientist, Dr. Mahlon Loomis, creates a method of communicating through the earth's atmosphere by using an electrical conductor. He did this by flying two kites that are rigged with copper screans and wires that are connected to the ground on two different mountains about 18 miles apart. 1866- The first trans-Atlantic telegraph was built. (Doesn't really have much to do with cell phones, but it's a major advancement for communication. 1921- A police department starts installing mobile radios, but it fails because there is too much interference and over crowding channels. (2MHz) 1934- U.S. Congress creates the FCC (Federal Communications Commission) 1940's- Mobile radios are starting to operate at 30 to 40 MHz. 1945- The first mobile-radio-telephone service is made in St. Louis, Mississippi. (Has 6 channels and can operate at 150 MHz) 1947- AT&T comes out with the first radio car phone that only works between New York and Boston. 1949- Radio Common Carriers (RCC) are the first link between mobile phones and the telephone, rather than just radio to radio. 1956- First car phone becomes available to the United States. The system is still using push-to-talk phones, and it is an improved version that works. However, the units are big and bulky, and require a personal radio operator to switch the call. 1964- New operating system is created so it can operate on a single channel at 150 MHz. This removes the need for push-to-talk operators. 1969- The self-dialing capability is now upgraded to 450 MHz and becomes standard in the United States. This is known as (IMTS) Improved mobile telephone service. 1970- Cell phone lobbyists finally win with the FCC and get a window of 75 MHz in the 800 MHz region, which allocated specifically for cell phones. 1971- AT&T proposes a modern day mobile-phone system to the FCC. This divides cities into cells. 1973- The first personal handset is invented by Dr. Martin Cooper while working for Motorola. 1974- The FCC encourages cell phone companies to push forward the “cellular idea”. 1975- AT&T adapts its own cellular plan for the city of Chicago, but the FCC is still unsure about putting the plan into action. 1977- Cell phone testing is permitted by the FCC in Chicago 1981- The FCC makes strict rules about the growing cell phone industry in dealing with manufactures. 1988- The CTIA (Cellular Technology Industry Association) is formed and helps to make the industry into an empire. One of its biggest contributions is when it helped make TDMA phone technology. 2001- Bellsouth leaves the payphone business due to the competiton of cell phones

COMPARISON OF PAST AND PRESENT DEVICES
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PURPOSE
A cell phone has many purposes. It serves as a communication device, a game console, and it can even get on the internet. Also, it can take pictures, take videos, and record stuff.

LINKS
[|Cell Phone Timeline Video] [|Cell Phone Timeline]