Page 26 of 39 RTE6701-OEM Integration Manual VC27U V1.03 DRAFT.doc
device byte]
:
a single byte identifying with whom the block is associated. The value is always:
"O" :
Optical reader.
[type byte]
:
a single byte providing additional information as to the contents of the [text
information].
The value is always:
"U" :
unsolicited data
9.1.1.2 Text Information
Format:
<SOH>[length]"OU"<STX>[flag][optical data]<ETX>[BCC]
The 3M
TM
RTE6701-OEM is capable of reading three lines of data with the first line being the highest on the
document. The [optical data] field consists of 3 lines separated by the <CR> character. The general format for
[optical data] is:
[line 1]<CR>[line 2]<CR>[line 3]<CR>
If a line is not present the associated <CR> is always transmitted. If two lines are found then line 1 is assumed
to be missing and if one line is found, then lines 1 & 2 are assumed missing. Another way of putting this is that
the bottom line of the document is always line 3. e.g. only one line found transmitted as:
<CR><CR>[line 3]<CR>
If 3 lines of OCRB data are present the data is assumed to conform to the format of the US Resident Alien Card
(I-55) and ICAO Machine Readable Travel Card both of which are limited to 30 characters per line. Over length
lines are truncated from the right. Each line is padded with the underscore character "_" to the required 30
characters.
If 2 lines of OCRB data are present the data is assumed to conform to the ICAO 9303 standard for machine
readable passports and visas and is limited to 44 characters per line. Each line is padded with the underscore
character "_" to the required 44 characters. Over length lines are truncated from the right.
The [flag] byte is always present but is specifically used to provide information regarding the validity of E13B
data. The values for the [flag] byte are as follows:
[flag] = "0" OCRB data without any E13B characters.
All other values are reserved.
Any unrecognised characters are transmitted as the underscore character "_".
To Next Page
Loading...