Configuration 1

Configuration 1: PC speakers

Description: This is simplist configuration where a single PC is used to play sounds
to speakers connected to the PC.  This setup is popular for home users for reminders, such as appointment and medicine reminders.   This configuration could also be used for small store fronts for store announcements where a PC on the floor is not an issue.
PC with 486 or higher processor
Sound Card
Computer speakers

Configuration 2: Standard Public Address or School Bell System
Configuration 3: Variable Classroom Schedule
Configuration 4: Wireless Audio Transmission