Which devices can a building automation system send alarms and logs to besides off-site PCs?

• A. Pagers, Fax machines, and Cell phones
• B. Pagers
• C. Fax machines
• D. Cell phones

Answer: (A)

Alerts from a building automation system are often routed to multiple external devices to ensure the right people are notified quickly, even if one channel is busy or unavailable. Pagers are valued in critical environments because they operate on a separate paging network that can work even when other networks are congested or down, giving a reliable alert path. Fax machines offer a tangible, printable record of logs or alarm summaries received over phone lines, which can be important for documentation and compliance. Cell phones provide immediate, portable alerts via SMS or voice, allowing on-call staff to respond from anywhere. Using all three creates redundancy and broad reach, which is why this broader set is the best fit. Limiting alerts to just one device (pager only, fax only, or cell phone only) reduces the chances that someone receives the notification or can act on it promptly.