I used to be connected to cable internet, which was downstairs running out of Ethernet port and another socket. The NBN guy had to look for a phone line and found it upstairs in this electrical cupboard, he plugged in the nbn box and the tpg modem.
not sure why this couldn't be placed downstairs where the old connection was removed.
signal is terrible.
@staceyH1 . If you have the white nbn box connected to a standard telephone outlet (FTTC), you can try moving it and the router to a telephone outlet downstairs. Three blue lights on nbn box means it has connected to the network.