How do you normally use a fax machine with 3CX and a SIP Trunk? The only information I could find was this article about a Patton M-ATA device. We ordered one and couldn't get it to work correctly. Is this the only method to send and receive faxes with 3CX, using a real fax machine (not an online faxing service)? I'm sure this is a common question, but I can't find an answer.