Datamax Prodigy Operator's Manual page 136

L: Identifies an I 2 of 5 bar code with modulo 10 checksum (UPC
shipping container symbology) that does the special human
readable formatting and adds bearer bars to the top and bottom
of bars when encoding 13 digits. The ASCII range for the
numeric codes is 48-57. Code I 2 of 5's normal wide to narrow
bar ratio of 5:2. Font D and J also print different forms of the I
2 of 5 bar code. There must be a maximum of 8 bar codes per
label.
203 DPI Printer 152 DPI Printer
Page - D20 Appendix D