Intermec SR61T2D Programmer's Reference Manual page 127

SET------------------------------------
Add-ons Required ---------
Add-ons Optional ---------
SR60 Scanner Programmer's Reference Manual
Chapter 4 — Enabling and Configuring Symbologies
The following add-on filters for UPC/EAN are supported:
• Add-ons Required means that UPC/EAN labels must contain
a 2-digit, 5-digit, or C128 add-on segment in order for the
scanner to recognize or decode them.
• Add-ons Optional directs the scanner to recognize UPC/EAN
bar codes with or without P2, P5, or C128 2-digit add-on
segments.
• Disable Add-ons means the scanner will not recognize or
decode any add-on segment of UPC/EAN labels, but will
read and decode the standard UPC/EAN portion of the label.
Note: Due to the structure of add-on codes, selecting the optional
setting makes it impossible to ensure that the scanner will always
read the add-on portion of the label. Intermec makes no
guarantee, either written or implied, that scanners with optional
add-on decoding enabled will perform with the speed and
accuracy required for any given application.
The following bar codes affect all four UPC/EAN symbologies,
and are applied to all labels regardless of the leading digits of the
base label.
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