Unable to send fax. Fax fails with error 'Handshaking Failure 54' that is shown in GFI FaxMaker monitor and / or debug logs. 
 

After a call is placed successfully (which triggers a ringing on the remote side) any errors which occurs during the negotiation phase, transmission phase or cal termination phase are reported as a handshaking error: 54. The handshaking error:54 does not indicate in what stage the error occurred, so a closer look into the available logs files is necessary.

The initial approaches are:

• Check manually whether a user can dial the fax number and can hear a fax tone
• Check if the issue persists only with the fax number in question and if it is reproducible

Please verify if ECM is enabled for the fax session.

Please open a ticket with GFI Software Technical Support to get further assistance.
 

The 'Handshaking Failure 54' error is a generic error. Some causes of this error are: 

• Having an invalid fax number or the remote party is not a fax machine
• incorrect settings of the network element ( e.g. fax device, router, PBX, gateway, etc.) within your network or
• a network element ( e.g. fax device, router, PBX, gateway, etc.) within your network that is not configured optimal and causes timeouts

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