What errors can occur during the fax transmission Author: Luis Fernandes November 30, 2018 04:20 AnswerApplies to GFI FaxMaker The following errors can be encountered when a fax is sent or received. Call Failed: 46 Handshaking Error: 54 No dialtone detected: 45 Busy tone detected: 43 Related articles What does Handshaking Failure 54 mean? What does Busy tone detected: 43 mean? What does Call Failed: 46 mean? Error: 'Handshaking Failure 54' when sending a fax ( ECM ) What is the difference between G.711 and T.38 for fax over IP?