Hi @Breettoo . Did you download the manual from the Asus website? Page 61 has details on internet connection.
The cable goes from wall socket to DSL port; no splitter is used.
Can you try these settings (page 61).
Transfer mode: VDSL WAN (PTM)
Service unit: Internet
IP version: IPv4
WAN Connection type: PPPoE
Enable UPnP: no (for now)
802.1q Enable?: Yes
VLAN ID: 2
Other settings not shown in manual:
Connect to DNS server automatically, Enable NAT.
Leave Dual WAN off.
@Breettoo . Correct.
You should confirm your type of plan by logging in to My Account/Plan and Contract details.
You can also check your address here: https://www.nbnco.com.au/learn/rollout-map
If you were sent a "NBN box" or there was one already there, you may not be FTTN.
If TPG sent you a wifi router, you should get this one working first.