Brother HL-6050 User Manual page 166

When Interleaved 2 of 5 is selected with the parameter 't1' or 'T1':
Ten numerical characters '0' to '9' can be accepted as bar code data. Other characters cause a data
error. The number of characters for bar codes is not limited. Because this mode of bar codes needs even
characters, if the bar code data has odd characters, '0' is automatically added to the end of the bar code
data.
When FIM (US-Post Net) is selected with the parameter 't3' or 'T3'
Characters 'A' to 'D' are valid and one digit of data can be printed. Upper-case and lower-case alphabet
characters can be accepted.
When Post Net (US-Post Net) is selected with the parameter 't4' or 'T4'
Numbers '0' to '9' can be data and it must end with a check digit. '?' can be used instead of the check digit.
When EAN 8, EAN 13, or UPC A is selected with the parameter 't5' or 'T5'
Ten numbers '0' to '9' can be accepted as bar code data. The number of characters for bar codes is
limited as follows:
EAN 8: Total 8 digits (7 digits + 1 check digit)
EAN 13: Total 13 digits (12 digits + 1 check digit)
UPC A: Total 12 digits (11 digits + 1 check digit)
A number of characters other than above will cause data error that results in the bar code data being
printed as normal print data. If the check digit is not correct, the printer calculates the correct check digit
automatically so that the correct bar code data will be printed. When EAN13 is selected, adding '+' and
a two-digit or five-digit number after the data can create an add-on code.
When UPC-E is selected with the parameter "t6" or "T6":
The numbers '0' to '9' can be accepted as bar code data.
1 Eight digits (standard format) The first character must be '0' and the data must end with a check digit.
Total eight digits = '0' plus 6 digits plus 1 check digit.
2 Six digits The first character and the last check digit are removed from the eight digit data.
1: For eight digits, '?' can be used instead of a check digit.
2: Adding '+' and two-digit or five-digit number after the data creates an add-on code for all six and eight
digit formats.
APPENDIX (SPECIFICATIONS, FONTS AND BAR CODE) A - 11