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Hi bcasey1940
The NBN FTTP, could you check the lights of the NBN box?
There is the link so you can set up the modem manually. (Refers tFor NBN HFC & NBN Fixed Wireless).
https://community.tpg.com.au/t5/Modems-and-Devices/How-to-set-up-your-TP-Link-VR1600v-modem/td-p/709
Please advice
Thanks
Unfortunately your modem is a VDSL/ADSL does not habe router capabilities.
see the link
https://www.tp-link.com/au/home-networking/dsl-modem-router/archer-vr600v/
Thanks