These are set up a bit weird compared to normal WISP radio equipment. The default IP address is 192.0.2.1 for the radio. So you need to set a 192.0.2.3 with a subnet of 255.255.255.240. Looks like it is usually only accessible via the management port and you need to make or buy a special patch cable.
The User Guide is available here
You can download the Installation Guide from here
Both those documents show how to install and get into the device.