If you want to dial in to the OSU modem pool in order to get your mail or browse the web, you will need an Annex password. This is separate from your UCS password.
PAP allows login name and password verification to be accomplished without a script file.
PAP requires an Annex password. The Annex password itself does not expire. Users must log in to UCS at least once every 100 days to change their password. If you don't change your password, it will expire, and your account will be disabled shortly thereafter. When this happens, the Annex password will no longer work and you will not be able to dial in to the OSU modem pool.