Symbol Technologies DS 6608 - Manual (Page 249)

Advanced Data Formatting 15-17
Code Lengths
Define the number of characters the selected code type must contain. Do not select any code length to select code types of any length.
Scan these bar codes to define the number of characters the selected code types must contain. Select one length per rule only.
1 Character
2 Characters
3 Characters
4 Characters
5 Characters
6 Characters