By default, to access the modem’s configuration via web pages or to use its radio channel, the machine connecting to it must be configured in the same IP address class.
In the case of a link between two networks of different class, it will be necessary to modify the modem’s subnet mask (the modem does not act as a router).
This also has the advantage of filtering a class of IP addresses and not overloading the radio channel, or defining a coverage area associated with a specific class of addresses.
To achieve complete transparency between different or unknown network classes (e.g. internet) it is possible to set the subnet mask to 0.0.0.0.
The user manual can be downloaded from this page.