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Voice frequency primary patch bay : ウィキペディア英語版 | Voice frequency primary patch bay In telecommunication, a voice frequency primary patch bay (VF) is a patching facility that provides the first appearance of local-user VF circuits in the technical control facility (TCF). The VF primary patch bay provides patching, (monitoring ), and testing for all VF circuits. Signals will have various levels and signaling schemes depending on the user terminal equipment. ==References==
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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「Voice frequency primary patch bay」の詳細全文を読む
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