Robo-calls are typically used to notify parents of weather-related school delays and cancellations.

铃声响起时，只听见保罗校长在咆哮：“ 现在是6点15分，德菲高中叫你起床啦！” “闹铃电话”还主要用于将诸如由于天气原因推迟或取消课程的变动告知学生家长。