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Mobile / Wireless / Cellular Service
Wireless communication is the transfer of information between two or more points that are not connected by an electrical conductor.
The most common wireless technologies use radio. With radio waves distances can be short, such as a few meters fortelevision or as far as thousands or even millions of kilometers for deep-space radio communications. It encompasses various types of fixed, mobile, and portable applications, including two-way radios, cellular telephones, personal digital assistants (PDAs), and wireless networking. Other examples of applications of radio wireless technology include GPSunits, garage door openers, wireless computer mice, keyboards and headsets, headphones, radio receivers, satellite television, broadcast television and cordless telephones.
Somewhat less common methods of achieving wireless communications include the use of other electromagneticwireless technologies, such as light, magnetic, or electric fields or the use of sound.
The term wireless has been used twice in communications history, with slightly different meaning. It was initially used from about 1890 for the first radio transmitting and receiving technology, as in wireless telegraphy, until the new wordradio replaced it around 1920. The term was revived in the 1980s and 1990s mainly to distinguish digital devices that communicate without wires, such as the examples listed in the previous paragraph, from those that require wires. This is its primary usage today.
LTE, LTE-Advanced, Wi-Fi, Bluetooth are some of the most common modern wireless technologies.
A mobile phone is a telephone that can make and receive calls over a radio frequency carrier while the user is moving within a telephone service area. The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public switched telephone network (PSTN). Most modern mobile telephone services use a cellular network architecture, and therefore mobile telephones are often also called cellular telephones or cell phones. In addition totelephony, modern mobile phones support a variety of other services, such as text messaging, MMS, email, Internet access, short-range wireless communications (infrared, Bluetooth), business applications, gaming, and photography. Mobile phones which offer these and more general computing capabilities are referred to as smartphones.
The first handheld mobile phone was demonstrated by John F. Mitchell[1][2] and Martin Cooper of Motorola in 1973, using a handset weighing c. 4.4 lbs (2 kg).[3] In 1983, the DynaTAC 8000x was the first commercially available handheld mobile phone. From 1983 to 2014, worldwide mobile phone subscriptions grew to over seven billion, penetrating 100% of the global population and reaching the bottom of the economic pyramid.[4] In 2014, the top mobile phone manufacturers were Samsung, Nokia, Apple, and LG.[5]
Edmonds
Edmonds is a city in Snohomish County, Washington, United States, and is a Northern Suburb of Seattle located 11 miles (18 km) north of the city. Edmonds has a view of Puget Sound and both the Olympic Mountains and Cascade Range. The third most populous city in Snohomish County after Everett and Marysville, the population was 39,709 according to the 2010 census and the estimated population in 2015 was 40,490.[3] Based on per capita income, one of the more reliable measures of affluence, Edmonds ranks 20th of 281 areas in the state of Washington.[5]
Edmonds is a port in the Washington State Ferries system. Currently, the only ferry from Edmonds is a run to Kingston, Washington; in the past, there have been much longer routes from Edmonds to Port Townsend, Washington.[6]
Edmonds is the oldest incorporated city in Snohomish County. Logger George Brackett founded Edmonds in 1890, naming the city either for Vermont Sen. George Franklin Edmunds[7] or in association with the nearby Point Edmund, named by Charles Wilkes in 1841 and later changed to Point Edwards.[8] Brackett came to the future site of Edmonds while paddling a canoe north of Seattle, searching for timber. When a gust of wind hit his canoe, Brackett beached in a location later called “Brackett’s Landing”.[9]
The town was named Edmonds in 1884, but was not incorporated until 1890 as an official “village fourth class” of Snohomish County. In that same year, Brackett sold 455 acres (1.84 km2) to the Minneapolis Realty and Investment Company. The town was plotted and a wharf was added along the waterfront. Modest houses and commercial structures sprouted up with a row of shingle mills dominating the cityscape.