The ONVIF Auxiliary Commands are set of individual commands used to control different features of the ONVIF device. ONVIF Driver supports only Auxiliary Commands from the ONVIF Device Service endpoint.
Sending AUX Commands
The DeviceService functional item provides the possibility to send auxiliary command to the device and return the result. The supported auxiliary commands are available as auxiliaryCommands property.

The supported auxiliary commands from the ONVIF device are part of the Capabilities and they are available as attributes in the functional item.