Call module for emergency set System 55 Program-neutral Features: The call module is a component of the emergency set. The call module includes the electronics, the signal light, and the buzzer of the emergency set. A zero-voltage contact is provided for the duration of the emergency call. The visual and acoustic signal can be optionally set from continuous light continuous tone to flashing light emergency call using jumpers. Notes : For follow-up ordering if the emergency set should be expanded.