Datalogic DSM0400 Product Reference Manual page 22

Setup
The DSM0400 decoder supports either DM configuration or C128 configuration
barcodes.In this manual only C128 labels are included.
The DSM0400 default uses C128 labels for configuration. To switch back and
forth between the two barcode types, scan the following barcodes:
14
Restore Default Configuration
C128 switches to DM configuration
DM switches to C128 configuration
DSM0400 Fixed Mount Area Imager Bar Code Reader