I want to use an ARN for Internet connection through an ISDN BRI dialup on my ISP but it doesn't work. I have created a PPP circuit (Dial-on-Demand) and configured my login and password in the PAP fields (I used CHAP as well but still doesn't work). Do I need to configure an unnumbered interface (0.0.0.0) on the PPP ISDN WAN interface? What else do I need to configure.Your help will be really appreciated.Thanks.