How many alternate signaling tones are used in the alarm system?

The correct answer is that two alternate signaling tones are used in the alarm system. The use of two distinct tones is essential for providing clarity and differentiating between various types of alerts. Each tone can indicate a different status or type of alarm, which is crucial for immediate recognition and response by personnel monitoring the system. This dual-tone system helps in enhancing situational awareness and ensuring that individuals can quickly identify the nature of the alert, thereby facilitating efficient action when required.

Having only one tone might lead to confusion during emergencies, as there would be no way to distinguish between different alerts. Similarly, using more than two tones could complicate the signaling process and make it difficult for personnel to quickly ascertain the type of alarm, potentially leading to delayed responses. Thus, two distinct signaling tones strike an effective balance between clarity and simplicity in alarm notification systems.