Fax - Received no response to DCS or TCF

I’ve a new installation of FreePBX ( and I am trying to setup the fax to work over SIP lines. I’ve enabled the detect fax and set up the users to accept fax (emails were assigned, etc).

Still, when I am trying to receive a fax I am getting the error in the subject (Received no response to DCS or TCF).

I’m using PJSIP with my SIP lines.

Any ideas what is the reason for this error?


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