In order to send a fax broadcast, you must first import a fax list. Fax lists can be as simple as a simple list of fax numbers, or they can also include contact details, such as name, company name, etc. Contact details beyond just a fax number are used by the Cover Page and Custom Fax Header functionality of the Impact Fax Broadcast.
Importing Contact Information Manually – Import all other lists
Importing Contact Information Automatically with Field Identifiers – Import a list containing field
Importing Fax Numbers – Import a list containing fax numbers exclusively