The fax is today frequently use to deliver advertising messages. Many of them are spams. To avoid those messages, the administrator can create a blocklist for incoming and outgoing fax.
When clicking on the button Edit at the left side appear the blocked numbers/lists linked to the user and at the right side the predefined blocklist.
Select one or many lists at the right side and click on Add the list to the blocklists use at vous désirez utiliser dans la liste de droite et cliquer sur Ajouter à la liste rouge pour l'activer. ???