You can be notified of the status of the fax in several different ways. First of all, set the "Messages and Notifications" for the extension sending the fax to send an email or SMS to the sender with the Fax Transmission Results.
Secondly, the sender can check under the "My Extension" on the RC Portal. Go to "Messages" and then "Sent Items". The result of the fax transmission will show their.
Finally, the fax transmission results can be viewed in the "Call Log" of either the "Admin Portal" or the "My Extension" portion of the RC Portal.