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FSK standards for use in Caller ID and remote metering : ウィキペディア英語版 | FSK standards for use in Caller ID and remote metering
Frequency-shift keying (FSK) is used over telephone lines for Caller ID (displaying callers' numbers) and remote metering applications. There are several variations of this technology. == European Telecommunications Standards Institute FSK == In some countries of Europe, the European Telecommunications Standards Institute (ETSI) standards 200 778-1 and -2 – replacing 300 778-1 & -2 – allow 3 physical transport layers (Telcordia Technologies (formerly Bellcore), British Telecom (BT) and Cable Communications Association (CCA)), combined with 2 data formats Multiple Data Message Format (MDMF) & Single Data Message Format (SDMF), plus the Dual-tone multi-frequency (DTMF) system and a no-ring mode for meter-reading and the like. It's more of a recognition that the different types exist than an attempt to define a single "standard".
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「FSK standards for use in Caller ID and remote metering」の詳細全文を読む
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