P: postnet, Q: ucc/ean code 128, Valid characters: 0-9 – Datamax-O'Neil Class Series Programmer’s Manual User Manual
Page 202: Length: 5, 9 or 11 digits, The following example prints a postnet bar code, Length: 19 digits

Appendix G – Barcode Details
Class Series Programmer’s Manual
188
p:
Postnet
Valid Characters: 0-9
Length: 5, 9 or 11 digits
Valid bar widths: The width and height multiplier values of 00 will produce a valid Postnet symbol.
Usage: The bar code height field is ignored since the symbol height is United States Postal Service
specific. This bar code is to display the zip code on a letter or package for the US Postal Service.
The following example prints a Postnet bar code:
D11
1p000000015010032569
121100000000100Barcode p
E
Q:
UCC/EAN Code 128
Valid Characters: 0-9
Length: 19 digits.
Valid bar widths: The fourth character of record is the width of the narrow bar in dots. All other bars
are a ratio of the narrow bar (2 times, 3 times, and 4 times the narrow bar width). Human readable
characters for this bar code symbology are printed above the symbol.
The printer spreads a weighted module 103 check sum.
The following example prints a UCC/EAN Code 128 bar code:
D11
1Q00000001501000123456789012345678
121100000000100Barcode Q
E