In order to get the Quintum to talk PPOE you need to connect to the Quintum via console cable and be rady BEFORE you power up the Quintum.
When the Quintum is booting up, you will see a menu, where it ask you if you want to enter new info.
Pres enter or what ever it tells you, and that is the plce where you enter your username and password for the PPOE session.
The Quintum will keep reseting itself until it see a good registration on the provider.
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Best regards.