Make sure you are logged into the Console via the My Portal; Click on VoIP tab, the Cloud PBX tab and the Login to Phone Console button.
Click on Status from the left sidebar menu to expand.
Click on Faxes and then Send FAX button.
You'll get the following page:
Number: {Recipient fax number}
Schedule delivery: As soon as possible
Caller ID: {Make sure you selected your fax number}
Fax quality: {this can be left unchanged}
Page size: Automatic
Page rotate: Automatic portrait rotation
File in PDF or TIFF format: {this is where you can attach the file you want to fax}
Email status to: {you can enter an email to send you the status of your fax}
Then click the SEND button.