Doorbell
noun
A buzzer that will call you to the door is a doorbell.
よびりん
The reading is 呼ぶ and 鈴's reading, put together.
大便の最中に呼び鈴が鳴り、男はお尻も拭かずに玄関へ急いだ。
The doorbell rang while he was in the middle of pooping and he rushed to the door without wiping his butt.