Motorola DS6878 Reference Manual page 425

Then, in order to limit the full name to 15 characters, create the following ADF rule:
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Begin New Rule
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Action: Send Next 15 Characters
For a license belonging to Michael Williams, the parsed data is Williams, Michael and Williams, Micha after
applying the previous ADF rule.
Driver's License Set Up (DS6878-DL) 17 - 43
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Criterion: Parsed Driver's License
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Save Rule