翻訳と辞書 Words near each other ・ ITU School of Naval Architecture and Ocean Engineering ・ ITU School of Textile Technologies and Design ・ ITU Science Center ・ ITU Sprint Distance Triathlon World Championships ・ ITU Suleyman Demirel Cultural Center ・ ITU T.50 ・ ITU T.61 ・ ITU Telecom World ・ ITU Telecom World 2006 ・ ITU terrain model ・ ITU Triathlon Mixed Relay World Championships ・ ITU Triathlon World Cup ・ ITU TRIGA Mark-II Training and Research Reactor ・ ITU Turkish Music State Conservatory ・ ITU TV ・ ITU V.23 ・ ITU V.70 ・ ITU World Triathlon Series ・ ITU Youth Forum ・ Itu'muta ・ Itu'ti'u ・ Itu, Nigeria ・ Itu, São Paulo ・ ITU-D ・ ITU-R ・ ITU-R 468 noise weighting ・ ITU-R BT.656 ・ ITU-R P.525 ・ ITU-T ・ ITU-T Y.1564 Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク ITU V.23 ： ウィキペディア英語版 ITU V.23 The V.23 standard was an early modem standard approved by the ITU in 1988. It specifies audio frequency-shift keying (AFSK) to encode and transfer data at a rate of 1200 bits per second, half-duplex at 1200 baud (Mode 2), (or at a "fallback rate" of 600 baud, mode 1) for the forward data-transmission channel, and an optional 75 baud backward channel. * V.23 Mode 1 AFSK uses a 1300 Hz tone (FZ) for ''mark'' (typically a binary ''1'') and 1700 Hz (FA) for ''space'' (typically a binary ''0''), and a 1500 Hz center frequency (F0.) * V.23 Mode 2 AFSK uses a 1300 Hz tone (FZ) for ''mark'' (typically a binary ''1'') and 2100 Hz (FA) for ''space'' (typically a binary ''0''), and a 1700 Hz center frequency (F0.) * V.23 backward channel AFSK uses a 390 Hz tone (FZ) for ''mark'' (typically a binary ''1'') and a 450 Hz (FA) for ''space'' (typically a binary ''0'').) In some European countries,(and perhaps elsewhere), V.23 Mode 2 AFSK modulation, (without the backward channel) is used to transmit Caller ID information over POTS lines in the public telephone network. The 75 baud backward channel was originally envisioned for use in error correction schemes, but V.23 was also widely used in Videotex applications where the backward channel was used to send keyboard data in an asymmetrical full duplex scheme in devices such as the Minitel. ==Related technology== The BELL 202 communications standard defines a similar modulation scheme. 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 V.23」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.