Asus DSL-N12HP User Manual page 140

The settings shown above are described below.
PPP SETTINGS
The PPP Username, PPP password and the PPPoE Service
Name entries are dependent on the particular requirements
of the ISP. The user name can be a maximum of 256 characters
and the password a maximum of 32 characters in length. For
Authentication Method, choose from AUTO, PAP, CHAP, and
MSCHAP.
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