The two phone number fields, "Network Phone #1" and "Network Phone #2" tell AppleLink what phone number to dial. Consult your AppleLink manual for the number to use. The "Connect via…" button allows you to select a communication file for use with AppleLink. When you first set up your disk, click on these buttons to select a communication file. A file selection dialog will appear, and you should select the appropriate file from the "Communication files" folder on your AppleLink disk.