Wireless Router, user manuals, operating guides & specifications. Plug in your modem and turn its power on Your modem may take up to 10 minutes before it’s ready to use. Check the modem for the IP address that the ISP is sending you. 2. Plug in the nbn box Plug the black DSL cable into a working phone socket and into the wall socket plug on the nbn box. Prefer written instructions? Check out the FTTP modem set up guide (PDF | 267 KB) Got a DWA0122 modem instead? Here's step-by-step instructions to set up Belong's earlier modem. Once you’re through to the next page, select ‘wi-fi’. ETHERNET FTTP-GUIDE-100252165 What’s in the box? 1x Belong modem 1x Power cable 1x White FTTN/B cable The white FTTN/B cable is not needed for your set-up. Step A. Can’t find your nbn box? How to set up your Belong modem Unplug old devices Unplug anything connected to the phone sockets in your house.