For all mobile phone jammer are installed indoors

For all mobile phone jammer are installed indoors.
1956 old Watson's death, his son, Watson has become the chief executive member of the supreme leader, to become the second generation of IBM's leading figures. For decades, IBM Corporation in the small Watson called "the power of faith", inspired by, and strive to perfect service, to finally become the largest U.S. electronics company. June 1995, IBM with $ 3.53 billion acquisition of Lotus computer development company, wrote the modern commercial history extremely exciting one, the Lotus is second only to Microsoft, NOVELL, the world's third largest computer software manufacturers. Hewlett-Packard (HP) - HP (Hewlett-Packard) was built in 1939 and more than 60 years, extremely rapid development. It is unnecessary to take the specific lightning protection actions for mobile phone jammer .In May 2004, Softbank acquired Japan's third-largest fixed-line operator Japan Telecom successfully transition from the growing broadband and Internet services, and become a leader in the Japanese telecommunications market. AT & T American Telephone and Telegraph Company (AT & TCorporation) (NYSE: T) is a U.S. telecommunications company, founded in 1877, had long monopolized the United States long distance and local telephone market. AT & T in the past 20 years has gone through many layers and restructuring. At present, AT & T, the largest U.S. local and long distance telephone company, headquartered in San Antonio, Texas. AT & T, formerly known as the American Bell Telephone Company was created in 1877 by telephone inventor Bell. mobile phone jammer just shields the time in the class.This kind of mobile phone jammer will not be damaged by other external forces or not
In 1895, Bell split the U.S. nationwide long-distance business projects under development, the establishment of an independent company known as American Telephone and Telegraph Company (AT & T). In 1899, AT & T to integrate the business and assets of American Bell, the parent company of Bell System. The company has been the forerunner of the U.S. long-distance phone technology. In 1984, the U.S. Department of Justice in accordance with pp. antitrust laws "[[split of AT & T, split one inherits the parent company name of the new AT & T, Inc. (specializing in long-distance telephone service) and seven local telephone companies (Bell Seven Brothers "), the U.S. telecommunications industry has now entered the era of competition.  Installation of intelligent management system of mobile phone jammer can prevent examinees from cheating by using of such communication tools as the cell phone.