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The ITU Telecommunication Standardization Sector (ITU-T) is one of the three sectors (divisions or units) of the International Telecommunication Union (ITU); it coordinates standards for telecommunications. The standardization efforts of ITU commenced in 1865 with the formation of the International Telegraph Union (ITU). ITU became a United Nations specialized agency in 1947. The International Telegraph and Telephone Consultative Committee (CCITT, from (フランス語:Comité Consultatif International Téléphonique et Télégraphique)) was created in 1956, and was renamed ITU-T in 1993.〔(【引用サイトリンク】url=http://www.itu.int/history/ )〕 ITU-T has a permanent secretariat, the Telecommunication Standardization Bureau (TSB), based at the ITU headquarters in Geneva, Switzerland. The current Director of the Bureau is Chaesub Lee, whose 4-year term commenced on 1 January 2015,〔(【引用サイトリンク】title=TSB Director's Corner )〕 who replaced Malcolm Johnson of the United Kingdom, who was director from 1 January 2007 to 2014. == Primary function == The ITU-T mission is to ensure the efficient and timely production of standards covering all fields of telecommunications on a worldwide basis, as well as defining tariff and accounting principles for international telecommunication services.〔(ITU-T and TSB General Information )〕 The international standards that are produced by the ITU-T are referred to as "''Recommendations''" (with the word ordinarily capitalized to distinguish its meaning from the ordinary sense of the word "recommendation"), as they become mandatory only when adopted as part of a national law. Since the ITU-T is part of the ITU, which is a United Nations specialized agency, its standards carry more formal international weight than those of most other standards development organizations that publish technical specifications of a similar form.〔(apdip.net ) (p13)〕 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「ITU-T」の詳細全文を読む スポンサード リンク
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