We have a problem that some incomings fax have many bad rows, from at least 2 different customer and therefore not all lines are readable.

We tried first with to remove the ATA Device and changed that, that we receive them by mod_spandsp but the problem still exists.

Attached the log file:

Sender 1:https://pastebin.freeswitch.org/23960

Sender 2: https://pastebin.freeswitch.org/23961

FreeSWITCH version:

We use a patton ISDN/VoIP Gateway.

Any hint how we can resolve/debug that?

Thank you,

Raphael