Hi @ABee   Welcome to the Community1   Do you know what type of NBN technology you have? Your desired device is a router only, which means it will work for NBN FTTP (for bundled service).   If you are under the NBN FTTP technology, then VoIP will still work as it is connected directly to the NBN NTD box.   If you are under a different NBN technology (FTTN/FTTC/FTTB/HFC), then you need a VDSL modem/router as VLAN ID tagging is required for the service to work. If you'll use a third party device, then the bundled VoIP will not work.   BasilDV ... View more

@ABee .  If you have FTTP connection, the phone connects to the NBN box and is independent of the router. To use the X5460 as access point: Do factory reset on X5460. Login to its admin and change its LAN ip address to say 192.168.1.2 and save it. The browser disconnects so login using the new address. Disable DHCP and save. Connect the X5460 to the TPG router using LAN to LAN. Use Cat6 cables (NBN box to TPG router, and TPG router to X5460). If the X5460 wifi gives full coverage, disable wifi on TPG router. ... View more