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    busy tone detector

    Abstract: HT95R6x tone decoder busy tone HA0227T HT95R65 dial tone
    Text: HT95R6x CPT Call Progress Tone Decoder 功能 HT95R6x CPT (Call Progress Tone) Decoder 功能 文件編碼:HA0227T 簡介 呼叫進程音 (CPT - Call Progress Tone) 是指從交換機到呼叫方的一組音頻音調,用以指示呼 叫的狀態,包括撥號音(Dial Tone)忙音(Busy Tone)、回鈴音(Ring-back Tone)、忙錄音(Recorder


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    PDF HT95R6x HA0227T HT95R64/HT95R65 HT95R6x 305Hz 640Hz busy tone detector tone decoder busy tone HA0227T HT95R65 dial tone