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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Toll switching trunk ： ウィキペディア英語版 Toll switching trunk In telecommunication, a toll switching trunk or toll connecting trunk〔(The Digital Future, 1979 ) Toll connecting trunk〕 is a trunk connecting one or more end offices to a toll center as the first stage of concentration for intertoll or long distance traffic. Operator assistance or participation may be an optional function. In U.S. common carrier telephony service, a toll center designated ''Class 4C'' is an office where assistance in completing incoming calls is provided in addition to other traffic; a toll center designated ''Class 4P'' is an office where operators handle only outbound calls, or where switching is performed without operator assistance. == References == * 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「Toll switching trunk」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.