Portcast technology can add audio and I/O functionality to a camera. It allows for the integration of additional functionalities such as audio inputs and outputs, as well as input/output ports for various sensors and devices.
This feature enhances the capabilities of the camera beyond just video recording. This information is corroborated by Axis Communications' technical documentation and product guides.

Axis' Corridor Format is designed to provide a vertically oriented video stream, which is ideal for monitoring narrow areas such as aisles. This format minimizes wasted space in the field of view and focuses on the desired area. For a retailer wanting to capture more of the aisle and less of the shelves, enabling Corridor Format on the AXIS M3204 camera would be the best solution. Detailed setup instructions can be found in Axis Communications' user manuals and configuration guides for Corridor Format.

The maximum power level at the powered device for PoE class 2 is 6.49 W. Power over Ethernet (PoE) class
2 devices are designed to consume between 3.84 W and 6.49 W. This classification helps ensure that network devices receive the appropriate power levels required for their operation.
Reference: Axis Communications. "Power over Ethernet (PoE) standards and classifications." Axis PoE Standards.

"Thermal radiation does not pass through standard glass lenses, as glass is opaque to the long-wavelength infrared radiation detected by thermal sensors. Special materials such as germanium are used for thermal camera lenses because they allow infrared radiation to pass through."
- Axis Communications Academy, Thermal Imaging, 2022
"Conventional glass lenses are not suitable for thermal imaging cameras because they block the wavelengths of infrared energy that thermal sensors use. Therefore, thermal lenses are made from materials like germanium."
- Axis Communications, Thermal Cameras Technology
References:
Axis Communications Academy, Thermal Imaging, 2022 (p. 6-7)
Axis Technology Overview: Thermal Cameras

If a PoE (Power over Ethernet) switch is unable to supply sufficient power to a network device, a midspan, also known as a PoE injector, should be used. A midspan is an external device that adds power to the Ethernet cable, thus providing the necessary power to the network device. This is particularly useful when existing network infrastructure cannot be upgraded to meet power requirements. According to Axis documentation, midspans are recommended to ensure adequate power delivery for network devices that require PoE.