When using AXIS People Counter, the camera lens must be facing straight down. This positioning ensures the most accurate counting of people as they pass through the monitored area. The overhead view eliminates obstructions and provides a clear field of vision directly below the camera, which is essential for precise counting. This recommendation is verified by Axis Communications' guidelines on deploying the AXIS People Counter application.

The feature in Axis cameras that allows a fixed box style camera to tell a PTZ camera to move to a preset is the HTTP server. Axis cameras can use HTTP commands to communicate with each other over the network.
By sending an HTTP request from a fixed camera, the PTZ camera can be directed to move to a specific preset position, enabling coordinated surveillance coverage.

Audio detection in Axis cameras is used to detect changes in decibel levels, which can indicate unusual or noteworthy events such as alarms, breaking glass, or raised voices. This functionality does not necessarily require a built-in microphone; it can also work with external microphones. The primary function is to trigger alerts or recordings based on significant changes in the audio environment. Axis Network Video documentation outlines the use of audio detection for enhancing security by monitoring for specific sound patterns or levels.