Wikipedia
Call bell
A call bell is a bell that alerts and causes attention to the attendant who hears it.
Usage examples of "call bell".
The route lay up the old trail through Emigrant Gap, and their move would call Bell's bluff.
Perry Mason found the call bell in the kitchen, and replaced it with a buzzer.
Working swiftly and silently, he again disconnected the call bell and installed one of the buzzers.
She closed her eyes and listened to the call bell ring as he summoned the operator-, thenhis voice, indistinct, as he gave the number.
A single squad leadernot someone Alucius had metwas on dutyif on duty meant asleep in a wooden chair under the call bell.
He found the house, and pressed the outside call bell beside her name.