The default parameters for the OTB1S0DM9LP are as follows;
STOP BIT: 1
DATA BIT: 8
The above parameters are fixed and can not be changed. The only thing that can be changed is the BAUD RATE and ADDRESS and this is done with the rotary switches on the module.
Note: The OTB TM2 modules will be obsolesced 9/1/2018 and it would be recommended to look for a replacement either the STB product line or the M221 line as a replacement.