Annunciator

==English==
===Noun===
# Anything that announces something
# A signalling devices that shows which of several electrical circuits is active, especially such a device in a telephone switchboard
# A buzzer in a UK signal box, that sounds when a train activates a treadle positioned on the track. Provides a warning or announcement of a nearby train.
pl:annunciator
ru:annunciator
vi:annunciator
zh:annunciator