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A mobile phone jammer is an instrument used to prevent cellular phones from receiving signals from base stations. When used, the jammer effectively disables cellular phones. These devices can be used in practically any location, but are found primarily in places where a phone call would be particularly disruptive because silence is expected. ==Legality== Since these jammers actively broadcast radio signals, they may or may not be legal to possess or operate based on the specific laws of the area one is in. * Australia: Illegal to operate, supply or possess〔(【引用サイトリンク】title=Notification that the Australian Communications and Media Authority prohibits the operation or supply, or possession for the purpose of operation or supply, of specified devices )〕 * Brazil: Illegal, but installation in jails has been proposed. * Canada: Illegal, except by federal law-enforcement agencies who have obtained approval〔(Radiocommunication Act of Canada )〕 * EU: Illegal, according to the European Commission's "Interpretation of the Directive 1999/5/EC".〔(【引用サイトリンク】url=http://ec.europa.eu/enterprise/sectors/rtte/documents/interpretation_en.htm#h2-37 )〕 * India: Illegal by law to counter the illegal jamming except for Security/Military agencies. Can be used in jail, theatres, mosques, schools etc with prior permit and jamming strictly limited to the firm perimeter with zero leakage * New Zealand: Illegal to sell, manufacture or use.〔(【引用サイトリンク】title=Spectrum policy )〕 Legal inside jails by Department of Corrections. * Pakistan: Illegal to use without permission. The individuals or institutions must get No Objection Certificates (NOCs) before installation of such devices. * Singapore: Illegal to manufacture, import, use or sell radio jamming equipment other than by or for supply to a permitted person.〔(【引用サイトリンク】title=Spectrum policy )〕 * South Africa: Illegal. No organisation is allowed to jam cellular signals, and any device which is used to jam signals is illegal. 〔(【引用サイトリンク】title=This is who may jam cellular signals in South Africa )〕 * Sweden: Illegal. Legal inside jails and for military use.〔(【引用サイトリンク】title=Förbud mot störsändare )〕 * Ukraine: Legal, planned to be used in schools〔(Мобилки на тестах заставят замолчать )〕 * United Kingdom: Illegal to use, but legal to own. Having been proposed by prison inspectors,〔(【引用サイトリンク】title=BBC News - Jam mobile phone signals in prisons, says inspector )〕 installation and use in jails has been legal since the end of 2012〔(【引用サイトリンク】title=Page not found )〕 * United States: Cell phone blocking devices are used by federal officials under certain circumstances. Privacy rights of property owners may affect the policy and application of law within buildings. For radio communications, it is illegal to operate, manufacture, import, or offer for sale, including advertising (Communications Act of 1934).〔(【引用サイトリンク】title=Reports )〕 Blocking radio communications in public can carry fines of up to $112,000 and/or imprisonment of up to one year.〔(FCC: Wireless Services: Cellular Services: Operations: Blocking & Jamming )〕 The Homeland Security Act of 2002 may override the Communications Act of 1934. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mobile phone jammer」の詳細全文を読む スポンサード リンク
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