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The phone should be connected to the socket on the back of the modem that is next to the power socket, it's on the right hand side as you're looking at the back of the modem, check that it's not plugged into the dsl socket that's on the left hand side as you look at the back of the modem.
Is TPG in here? I still have no landline.
Hi @Junemoon1,
Welcome to TPG Community!
We noticed that this post is already marked as resolved.
If you are still not able to use the home phone, you may check this link for the general setup guide of your NBN HFC.
Let us know if you still need further assistance.
Kind regards,
BasilDV