In later versions of SIA formats, what additional data may be included beyond zone and 20-digit event code?

• A. An optional caller ID alongside event codes.
• B. GPS coordinates of the alarm site.
• C. A 1-digit partition or area and a 2-digit modifier code (alpha).
• D. A 4-digit customer number.

Answer: (C)

In later versions of SIA alarm reporting formats, you can add extra fields to convey more detail beyond the zone and the long event code. Specifically, you’ll see a one-digit partition or area identifier that pinpoints a subsection of the site, plus a two-digit modifier code (alpha) that provides additional context about the event type or status. This combination lets responders understand not just where the alarm happened, but a finer nuance of the incident, without changing the core event code structure. Other data like GPS coordinates, caller ID, or a separate customer number aren’t part of this added SIA field set, so they aren’t included in the standard extended data in this format.