an·nun·ci·a·tor /əˈnʌn(t)siˌetɚ/
通告者,電鈴指示裝置
annunciator
信號器 ANN
annunciator
告示器 信號器
An·nun·ci·a·tor n.
1. One who announces. Specifically: An officer in the church of Constantinople, whose business it was to inform the people of the festivals to be celebrated.
2. An indicator (as in a hotel) which designates the room where attendance is wanted.
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annunciator
n : an indicator that announces which electrical circuit has
been active (as on a telephone switchboard)