Intermec EasyCoder E4 Programmer's Reference Manual page 9

Chapter 2 Getting Started
4. Serial Communications Test, cont.
Each line will be acknowledged by Ok on the screen, provided it
has been entered correctly. When you press ↵ (Carriage Return)
the third time, the printer will feed out a label, ticket, tag, or
a piece of strip with the text printed in the lower left corner of
the printable area.
ABCDEFGHIJKLM
You can try using other characters between the quotation
marks in the third line, especially typical national characters like
ÅÄÖÜ¿¢¥ç, etc. If any unexpected characters are printed, you
may need to select another character set (see Chapter 6.11), or
change the communication setup from 7-bit to 8-bit character
length.
EasyCoder E4 Direct Protocol v2.10 – Programmer's Reference Manual 7