Commercial security planning glossary

Use these terms to ask clearer questions about a commercial or industrial project. Definitions explain concepts, not installation instructions. The exact model, configuration, manufacturer documentation and applicable requirements govern a system’s behavior.

24-hour zone: An alarm input configured to remain active independently of normal intrusion arming. Its response depends on the device, programming and applicable requirements.
Access code: An authorized user’s code for permitted system functions. Code length and permissions are product-specific; use individual credentials where supported.
Arming: Placing the selected intrusion area into its configured protective state. Arming does not confirm that every device or communications path is healthy.
Away arming: An intrusion mode typically used when an area is unoccupied. The installer must explain which zones and delays apply.
Stay arming: An intrusion mode that typically leaves selected interior zones inactive while other zones remain armed. Confirm the actual configuration.
Backup or standby battery: A battery that supports equipment when its normal power source is unavailable. Required capacity, testing and replacement depend on the system and application.
Bell or sounder: An audible signaling output or device. Its meaning and permitted operation depend on the system; not every sound indicates the same event.
Bell cutoff: A configured limit on sounder operation. Settings must follow the equipment instructions and applicable requirements, not a universal time from a glossary.
Bypass: An authorized exclusion of a zone from specified operation. It creates a coverage limitation that must be understood, recorded and resolved.
Carbon monoxide detector: A device intended to detect carbon monoxide under its specified conditions. Follow its instructions and the facility’s emergency procedures; this glossary is not response guidance.
Cellular monitoring: Transmission of system information over a cellular network. Coverage, power, equipment support, subscriptions and supervision still affect reliability.
Central station or monitoring center: An organization receiving and processing specified signals under an agreed service. Confirm notification, verification and escalation procedures in writing.
Chime: A local indication of selected activity, such as a door opening. It is not necessarily an alarm or a monitored event.
Communicator: Equipment that transmits alarm or system information over an approved communications path. Its compatibility and supervision must match the application.
Contact; door or window sensor: A device used to indicate an opening’s condition. An opening contact alone does not prove that a lock is secure.
Control panel or panel: The system controller and associated electronics. A keypad may be separate from the panel; product layouts vary.
Disarm: Removing the selected intrusion area from its armed state. This does not remove power or necessarily disable independently active zones.
Entry delay: A configured interval associated with an authorized entry route. Confirm the actual procedure with the provider rather than assuming a standard duration.
Exit delay: A configured interval allowing departure during an arming sequence. Staff need training on the approved exit route and indications.
Flood or water sensor: A device that detects water at a specified location or condition. Placement and the response plan determine its usefulness.
Freeze or low-temperature sensor: A device that reports a selected temperature condition. Threshold, placement, measurement accuracy and notification behavior are model- and application-specific.
Geo-services or geofencing: Location-based features using a defined geographic boundary. Availability, permissions and behavior vary; they are not exclusive to one security brand.
Glassbreak sensor: A detector using a specified method, such as acoustic or vibration sensing, to identify possible glass breakage. Application and coverage limits matter.
Hardwired system: A system using physical wiring for some or all field devices. Wiring condition, supervision, pathways and documentation remain important.
Heat detector: A device responding to specified heat conditions. It is not interchangeable with a smoke detector; selection belongs in the applicable life-safety design.
Hybrid alarm system: An alarm system combining wired and wireless devices. Confirm which devices and functions the selected panel supports.
Image sensor: A detection device with associated image capture. Image delivery, retention, permissions and service requirements vary by product.
Keypad or touchpad: An interface for authorized system operation. Available commands and permissions depend on the configuration and user role.
Master code: A privileged code with specified administrative capabilities. It should be protected and managed under the organization’s access policy.
Memory or event history: Stored system events used for review. Capacity, timestamps, retention and export options depend on the platform.
Motion sensor: A device detecting movement through its specified sensing technology. Coverage, environmental limits and placement must be checked against the selected model.
Periodic test transmission: A scheduled communications check. Successful transmission does not demonstrate that every sensor works; missed-check handling and intervals must be agreed.
User programming: Settings available to authorized customer users, such as selected codes, schedules or notification preferences. Permissions vary.
Installer programming: Configuration requiring the appropriate technical role, authorization and competence. Changes can affect system operation and must be documented and verified.
Security phrase or passphrase: An agreed method of authenticating an authorized person during provider communication. It is distinct from a keypad code; response procedures vary.
Security system: The equipment and workflows supporting defined security objectives. Video, access control and intrusion detection have different functions and limitations.
Smoke detector: A device responding to smoke under specified conditions. Alarm, notification and monitoring arrangements depend on the actual life-safety system design.
Test mode: An agreed testing arrangement with the provider or monitoring center. Define its scope, responsible personnel and confirmation of return to normal service.
Voice dialer: Equipment or a service delivering specified voice notifications. Notification alone does not establish monitored response or dispatch.
Wireless alarm system: A system using radio communications for supported field devices. Radio coverage, interference, batteries and supervision require planning.
Zone: A defined input or detection grouping with a programmed response. A zone number should have a clear location and function in the documentation.
Partition: A separately managed alarm area within a supported system. User permissions, schedules and shared devices require coordination.
Trouble condition: An indication that a system component or function needs attention. Staff should know who reviews, records and resolves these indications.
Access credential: A card, fob, mobile credential or other supported means of presenting identity or authorization at a controlled opening.
Door schedule: A project record describing each controlled opening, its hardware, operation, interfaces and responsibilities. It is also a term used for timed door-operation rules.
Video retention: The period during which recordings remain available. Verify actual results under the agreed camera settings, workload and storage configuration.
Handover package: The agreed customer records, training, account ownership, equipment inventory, test results and support procedures delivered at completion.

Use the definitions in your project records

Ask the provider to identify the equipment, location, responsible person and expected response behind each term in a proposal. Keep the zone list, door schedule, user roles and acceptance tests with the project brief.

For a product-specific example, DSC publishes PowerSeries Neo product information and manuals. Do not apply one panel’s instructions to a different system.

Continue with intrusion-alarm planning, controlled-door planning or fire-alarm project coordination. Current provider information is available through the NERSA knowledge center.