Intermec VT220/ANSI, Programmer'S Reference Manual

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APPENDIX A
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Bar Code Scanning
A-2 VT220/ANSI Terminal Emulation Programmer’s Reference Guide
How to Enable Algorithms
To maximize wireless terminal and network performance, it
is recommended that you enable only the bar code types re-
quired by your network and host application software. The
more bar code algorithms enabled in the wireless station,
the slower the response time. Likewise, the more types of
bar codes the host application receives, the slower through-
put time on processing bar code data.
How the Host Gets Bar Codes
The wireless station encodes descriptive data along with
bar code data returned to the host computer. This encoded
data indicates the type of bar code scanned and, in some
instances, the length of the bar code data. Also included in
the format may be check digits, start and stop digits, sys-
tem digits, add-on digits, and flags.
Bar code data streams always begin with the bar code type
followed by the bar code data. Table A-1 details the bar code
types and the format of the bar code data string. Refer to
the wireless station’s user guide for the bar code types that
the wireless station supports.