翻訳と辞書 Words near each other ・ Meterana (moth) ・ Meterana pascoi ・ Meterana pauca ・ Meterana pictula ・ Meterana stipata ・ Meterana tartarea ・ Meterana vitiosa ・ Metered dose transdermal spray ・ Metered reply mail ・ Metered-dose inhaler ・ Meteren ・ Metergoline ・ Meterik ・ Metering ・ Metering mode ・ Metering pulse ・ Metering pump ・ Metermaids ・ Meters/bonwe ・ Meterythrosia ・ Metes and bounds ・ Metesh ・ Metethoheptazine ・ Metetí ・ Meteu 'L Klechem ・ Meteugoa ・ Meteugoa fasciosa ・ Meteugoa melanoleuca ・ Meteugoa obliquiata ・ Meteugoa ochrivena 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 Metering pulse ： ウィキペディア英語版 Metering pulse In telecommunications signalling, metering pulses are signals sent by telephone exchanges to metering boxes and payphones aimed at informing the latter of the cost of ongoing telephone calls. The properties of these signals differ between countries, but they typically have a frequency of 50 Hz, 12 kHz or 16 kHz, and a duration of several tens or hundreds of milliseconds. 50 Hz pulses are applied to the telephone circuit as common-mode signals, with respect to ground, as applying them differentially would allow the talking parties to hear 50 Hz buzz tones. These pulses are applied at relatively high voltage to distinguish them from 50 Hz power-mains-induced signals. 12- and 16 kHz metering pulses are applied differentially across the telephone circuit, as these frequencies cannot be heard by listeners with conventional telephone instruments. Each pulse represents a certain incremental cost. Therefore, during more expensive calls the exchange will generate more metering pulses per minute than during cheaper calls. == See also == * Automatic Message Accounting 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「Metering pulse」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.