Internal modems can be ISA and are either Plug-and-Play (PnP) or not.
You have to manually set up non-PnP ISA devices.
Note:
In order to identify your device, you need to have the documentation
for the device, or be able to contact the device manufacturer to
have it identified. Currently, there is no utility within QNX Neutrino to
obtain a list of ISA devices installed on your system.