...
The IP address (assigned automatically and can be changed if necessary).
Device serial number (for Axis devices only, see Axis IP Devices).
You can also customize a number of options shared by all video cameras in this group:
...
In the Other group, you can configure the parameters for the devices connected via the RTSP protocol (see Configuring connection of devices via RTSP).
In the Alternative camera 1 field, you can specify any camera in the current domain that can replace this camera on the layout when it isn't connected.
...