Enabling fax involves administering a telephony card to recognize fax as being associated with a particular digital protocol.
To enable fax on a telephony card that has already been administered:
The system displays the Change Card - Digital Interfaces screen.
The system displays a Change Parameters screen for the specified protocol.
The system displays a Change Card screen for the card.
The system displays information about the success or failure of the administration attempt.
Administration changes do not take effect until you stop and start the voice system (see Stopping and starting the voice system).