Setting up your connection
Having a nbn™ Fibre to the Premises connection, also known as FTTP will require your connection to be set up like the picture below.
Check your power
The nbn™ connection box is also known as a Network Termination Device or NTD. The NTD also has Power Supply.
Ensure the nbn™ box (NTD), power supply and modem are powered on.
Check your cabling
Ensure your modem's WAN port is connected via ethernet cable to the nbn™ box (NTD) UNI-D port, usually the number 1 port.
Ensure there is no phone cable connected to your modem DSL port.
Has this fixed your internet?