How to Schedule a service.   Important   Please turn on your desktop speakers and check the volume level settings.   You can simulate an incoming call by clicking on the handset.   You may want certain services in specific time slots. For example, a quiz contest must be live every day during a particular time period.   Manually starting and stopping the IVR service every day may not be practical.   In this script, we have added some intelligence, so that the IVR service can be initiated or terminated automatically at custom specified time.   Two global variables are controlling this start and stop time in the script. Try changing those values and see how it works.