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Narrowband modem : ウィキペディア英語版 | Narrowband modem In telecommunication, a narrowband modem is a modem whose modulated output signal has an essential frequency spectrum that is limited to that which can be wholly contained within, and faithfully transmitted through, a voice channel with a nominal 4 kHz bandwidth. ''Note:'' High frequency (HF) modems are limited to operation over a voice channel with a nominal 3 kHz bandwidth. ==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「Narrowband modem」の詳細全文を読む
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