Overview

Transmission failures can occur for a number of reasons depending on the device type and communication error. They can be encountered when a fax is sent or received.

Among the most common transmission errors, we have:

• Call Failed: 46- quite generic, can be related to a variety of underlying causes.
• Handshaking Error: 54 - includes failures to send a fax to a specific number, aborted faxes, and modem timeouts. 
• No dialtone detected: 45 - shown when sending faxes, usually during initial setup, after an upgrade, migration, or IP address changes. 
• Busy tone detected: 39 - shown on one of the lines when sending faxes.
• Unknown error: 3 - not restricted to, but more common with FoIP and Brooktrout devices.

Information

As these errors can be highly dependent on environmental details like the types of devices, lines, and customer-specific configuration requirements, we recommend you to start with one of the following troubleshooting articles, according to the error you have noticed:

• Call Failed: 46
• Handshaking Error: 54
• No dialtone detected: 45
• Busy tone detected: 39
• Unknown error: 3

Each article above covers a different situation and contains instructions on how to provide additional information in case you need to open a ticket with FaxMaker support.