For customers experiencing any issues with their NBN service, we recommend the best thing to do first is check if there's an outage on the NBN network.
We have created this article that can guide you on How to Check for NBN Network Outage
If there are no known outages in your area, customers can proceed with the troubleshooting steps indicated on this article : https://community.tpg.com.au/t5/Featured-Articles/Troubleshooting-No-Dial-Tone-TPG-Home-Phone-Voice-Service/ba-p/1240
In your case, our Engineering team raised the issue with our International carrier and able to resolve the problem on their end. We understand that you've confirmed that the international call is working and if you need further assistance, please let us know.
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