A noncoded alarm system is characterized by what feature?

A noncoded alarm system is defined by its lack of specific location information at the control panel when an alarm is activated. This type of system simply alerts to an activation in the building but does not indicate which specific device or location triggered the alarm. This is important for fire safety and response protocols, as it helps fire departments understand the general area of concern but does not provide precise details that might be essential for efficient response.

In contrast, a coded alarm system provides detailed information about the specific device that has been activated, allowing for a more targeted and effective response. The other options, while important features of alarm systems, do not accurately characterize a noncoded alarm. For instance, visual and audio notifications are common in various alarm systems, not just noncoded ones, and automatic activation of sprinklers pertains to system functionalities not directly related to the coding of the alarm itself.