busy tone signal 中文意思是什麼
busy tone signal
解釋
忙音信號-
If a second person calls while the " call waiting " function is deactivated, that caller will get the busy signal and you will not hear the special alert tone
若要接聽或打出重要電話,可先暫時取消來電待接訊號,如再有第三者打入電話,對方會聽到線路繁忙訊號,而用戶也不會聽到來電待接訊號。
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