Get a home phone plan on the nbn network
You're able to get a home phone service on the nbn network, however it's not required. The nbn network uses VoIP technology (Voice over IP) to provide the home phone services and if you're coming from another provider, you can request to keep the same number.
Since a home phone using VoIP must be plugged into the power, if the power fails, you’ll need to use a mobile phone to make or receive calls, including for calling emergency service numbers (e.g. 000). For Fibre to the Premise (FTTP) connections, you may have the option to install a battery back-up power supply unit which will provide emergency power for up to 5 hours. A battery backup unit won’t power any cordless phones or phones that require external power. You can learn more on Connect and Move to the NBN Network.
You can order an AGL Home Phone with your Internet service online on nbn Plans.