Why does the log show error correction off but modem config shows error correction on?

Having error correction enabled on the FF420 modem config page is only half of the picture.

The FF420 log will show error correction was used only if both sides of the fax connection support error correction and the 2 sides can agree on a common error correction method to use.

The FF420 fax log will indicate error correction is off, if the 2 sides can't agree on a common error correction method, or if the remote device indicates it doesn't support, or isn't using error correction.