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2. 70/630 DGS
COMPONENTS
GENERAL
DGS INPUT STATION
MODEL 6312
TRANSMITTER
(See Figure 5)
•
The DGS permits the user to capture source or transaction data
accurately, as it occurs. This data can be captured or collected where it
occurs, \vhether a few feet from the central facility or a few thousand
miles and transmitted to that facility over common voice-grade com-
munications lines at a rate of 120 characters per second.
The components that make up the complement of required and optional
DGS components are listed belO\v.
•
The DGS Input Station provides a flexible, electronic scanner and
transmitter that operates remotely from the central processing facility.
Its function is to scan and transmit source or transaction data input in
the form of punched plastic badges, 80-column cards, variable data through
keyboard entry, and digital signals transmitted by a user-supplied digital
readout device. The DGS Input Stations available are the Model 6312
Transmitter or 6311 Transmitter. (See Figure 4.)
•
The basic 6312 Transmitter can read and encode 124 alphanumeric
characters in a single message and transmit those characters at a rate of
120 per second. Reading is bit parallel, transmission bit serial. The Input
Station is equipped with a standard 10-position pushbutton Transaction
Selector and a Supervisory Lock and Key. All optional input devices are
attached to the basic transmitter which is table mountable. In addition
to the prepunched or variable message characters the 6312 Input Station
transmits a one-digit Start of Text (STX) Character, a one-digit Trans-
action Code (TC), a three-digit Station ID, and a one-digit End of Text
(ETX) Character. The general message format is:
STX, TC,ID,n ...... n,ETX
where n
=
118 prepunched and variable characters.
i
The 6312 (124 characters) and the expanded version of 188 alphanumeric
characters (Feature 5608) may have any combination of input devices
with only two restrictions:
1.
The maximum number of characters minus the constant characters
may not be exceeded in any single transmission -
using the basic
6312: 118 alphanumeric characters; using the 6312 with expansion
Feature 5608: 182 alphanumeric characters.
2. The transmitter can accommodate one to two badge readers or one
to two card readers. However, the combination of badge readers/card
readers may not exceed three (i.e., one badge, two card) with any
DGS transmitter.
With these two constraints in mind, the user may specify any com-
bination of input devices as sho\yn in Table
1.
8
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