Hi, when sending a fax to a particular destination it fails with "Fax processing not successful - result (13) Unexpected message received." To other destination is working ok, i don't know what is the particularity on this one that makes it fail... From the logs i see: 2017-11-24 18:30:05.625309 [DEBUG] mod_spandsp_fax.c:276 FLOW T.30 Rx: CFR with final frame tag 2017-11-24 18:30:05.625309 [DEBUG] mod_spandsp_fax.c:276 FLOW T.30 Rx: ff 13 84 2017-11-24 18:30:05.625309 [DEBUG] mod_spandsp_fax.c:276 FLOW T.30 Rx final frame in state D 2017-11-24 18:30:05.625309 [DEBUG] mod_spandsp_fax.c:276 FLOW T.30 Unexpected CFR frame in state D I guess that is not suppose to receive confirmed to received.. because the training is not yet done. Can i do anything from my side to make it work? I've tried with different resolutions but no luck.. i try with t38 but this gw the t38 is not well implemented and also didn't work. To send the fax i just do: originate {fax_verbose=true}sofia/gateway/CS2K/939165135 &txfax(/root/txfax.tiff) Attach full log. Thanks for the help. -- Saludos / Regards / Cumprimentos António Silva