Hi
I am not familiar with that Modem/Router, but if it has the option to use ethernet connections rather than usb you will find it easy to connect as Linux will usually automatically recognize the connection. USB modem support is tricky in Linux and you may need a dedicated driver (I believe it must be compiled into the kernel or loaded as a module).
You could try to see if it is recognized by typing, as root:
If it is recognized, you will see it listed.
Hope this helps
Bob