isn't a real printer, it's a virtual one. When you enter the Fax console File menu you should be able to click on:
1. Send a Fax now
2. Receive a Fax
You can't share a fax printer for the reason I gave above - it's not a real device. If you are getting a message to say that all fax printers are inaccessible it's likely that an error has occured during the Faxing setup.
Open the Fax monitor, click on tools and select 'configure fax ' to run the wizard again.