When you first run the Apple Internet Dialer, it assumes you do not have internet access and guides you through setting up an account with a new ISP. If you already have dial-up access with an ISP, you can set it up by following these steps:
Step 1
Launch the Apple Internet Dialer application
Step 2
Choose Define Provider Information from the Provider menu.
Step 3
Enter the appropriate information for your ISP. if you do not know this information, call your ISP for the necessary information.