3. Select to which email address you want to email the received fax. If you select “Default FAX Destination”, the fax will be sent to the email address configured for the virtual fax extension number. Alternatively you can forward faxes to the email address configured for a particular extension. This allows you to create multiple DID rules so as to give people a personal fax extension. You can configure the default email address from the settings > fax node. Page 81 How to implement it? Write details.