If you have NBN FTTN make sure that your using the DSL port at the back of your Modem
Now log in to Netgear by going to http://www.routerlogin.net.
In Basic Settings Select Internet and Copy the settings as shown in my Screen Shot Below
Remember that your Home Phone will not work if you're going to use any other modem.
Let me know if this help.
Welcome to TPG Community!
The TPG NBN VoIP home phone will not work with a third party modem since the configuration is embedded in our modem firmware.
Should you require further assistance, please let us know.