Camera and recording terms
| Term | Meaning | Why it matters |
|---|---|---|
| Field of view | The width/height of the scene a camera sees | A wide view reduces the size of a distant target within the image. |
| Resolution | The image pixel dimensions or stated megapixel class | It does not alone establish useful target detail. |
| Bitrate | The amount of encoded video data per second | It affects storage and network design. |
| NVR | Network video recorder | Check channels, supported streams, throughput and usable storage. |
| PoE | Power over Ethernet | Compatible equipment can carry data and power on the connection. |
| WDR | Wide dynamic range processing | Compare performance in the actual mixed-light scene. |
| Retention | How long recordings remain available before being overwritten | It depends on usable capacity and actual recording settings/activity. |
Alarm and communication terms
| Term | Meaning | Why it matters |
|---|---|---|
| Zone | A configured detection input or grouped detection area | Its name should identify the real location/function. |
| PIR | Passive infrared movement detection | Placement, surroundings and supported pet conditions matter. |
| Door contact | A device detecting a door/window opening state | It does a different job from movement detection. |
| Part-arm | An arming mode for selected configured protection | The protected zones must suit people remaining inside. |
| Communicator | Equipment connecting supported events to an external service/path | It can have compatibility, network and recurring-service dependencies. |
| Monitoring | A provider receiving supported events and following contracted instructions | Clarify contacts, response scope and attendance charges. |
Visitor and access terms
| Term | Meaning | Why it matters |
|---|---|---|
| Door station | The visitor-facing intercom equipment | Check view, audio, reach and compatible answering points. |
| Credential | A supported identifier used to request access | Its format and revocation process must suit the system. |
| Controller | Equipment handling access decisions or outputs as designed | Reader, credential and door interfaces need compatibility. |
| Relay | A switching output used within an agreed interface | It does not automatically supply power to a lock or gate. |
| Account owner | The identity controlling administration/recovery | Keep it under customer or business control through personnel changes. |
Sources and equipment references
Checked for the product, supplier or information details used here. Exact procedures depend on the installed model; these links are not a substitute for its instructions.