Welcome to the community!
We do not have information about the User interface of the Sagemcom modem but in the event that you are with TPG NBN FTTN, HFC, FTTC you may check this thread for reference.
Please see below the settings required to connect with TPG NBN.
VLAN = 2
connection = VDSL PPPoE
username = email@example.com
password = TPG Password
Let sus know how it will go.
I'm trying to connect Sagemcom F@st 5356 modem to my new TPG NBN connection.
Got to the point the link light is Green. However the internet light is staying White.
Can anyone help?