Thanks for the link!

I am not sure which model we have here (model info is not conspicuous) but there is definitely no ethernet port, only USB.

The modem was supplied as part of a package deal by the ISP (Bigpond), so it looks as though we are out of luck unless we cough up for one of the models listed on that link, or unless we can just get the 'gateway' mentioned as part of the DW4020 model and combine it with the existing two (TX/RX) modems.

Or are there any routers with a USB input?
(You can tell I don't know much about networking )
(Being almost midnight doesn't help either )