Abnormal work warning: When an elevator appears to be working beyond its preset limit, the system will give off warnings. The HVAC fans are turned off.     Automatic warning: The system will automatically ring a warning alarm for service interruption and indicate the location and nature of problem.     Alarm for trapped passengers: It enables  passengers to establish two way communications  with the service center in case of being trapped in  an elevator.     Increases the efficiency of the maintenance staff.   Presents help augment security efficiency, emergency event response.   Entire bank of elevators are monitored and controlled to human comfort.     BACK