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Similar to ダイヤルパルス
Template:電話の信号
Template:Telsigs
DTMF
DTMF
共通線信号No.7
Signalling System No. 7
着信音
Ringtone
ハウラ音
Off-hook tone
発信音
Dial tone
呼出音
Ringing tone
話中音
Busy signal
Categories
電話の信号
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