annunciator

汉语翻译

n. 通报者, 信号器
【化】 报讯器

英语解释：

名词 annunciator:

1. an indicator that announces which electrical circuit has been active (as on a telephone switchboard)

详细解释：

an.nun.ci.a.tor

n.（名词）
One that announces, especially an electrical signaling device used in hotels or offices to indicate the sources of calls on a switchboard.
信号器，示号器：宣告物，尤指饭店或办公室中使用的一种电子信号装置，用来指示交换台上的呼叫信号来源