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GENERAL
(Cont'd)
THE SPECTRA 70/630
DATA GATHERING
SYSTEM (DGS)
Local System
Long Lines System
Print Back and Inquiry
Response System
In t
rodlu' f
if)
iI
the standard need he added at the point of transaction. Xow. a :-;econd
disad\'antage of batch proce:-;sing, transCl'iption errors, has been mini-
mized. Operations personnel can input source or transaction data
di]"ectl~'
to the central processing facility, minimizing the
costl~·
and }'edundant
conventional data pl'eparation step.
•
The 70/ 630 DGS operates on-line to any Spectra 70 3o, -1o, or ;");)
Processor having a 65K-byte memory (with TDOS
~ICS)
*
or larger and
equipped with a 70 668 Communications Controller-Multichannel. The
70 630 DGS Input Stations are located remotely at key points thl'oughout
all the user's facilities (whether within a few feet or a few thousands of
miles from the central processing facility) allowing the user to enter
source data accurately and rapidly into the system as the data originates.
This data may be in the form of punched card, punched plastic badges,
variable numerics, or digital signals converted from analogue. There are
two basic DGS systems which can operate independently or in concert
depending on the requirements of the user.
The~'
are the local and the
long lines system.
•
Within an intra-plant radius of 30 wire miles (from Input Station to
central processing facility), the DGS operates on its own with Input
Stations, DGS Line Concentrators, DGS Buffers, and Spectra 70 Com-
munications processing equipment. To accomplish this distance transmis-
sion, simple hdsted pair (hvo-wire) metallic voice grade lines are
required.
* *
The user has the choice of using local telephone company
supplied facilities which may already exist to a large extent in his installa-
tion. Or, he may supply his own lines provided that they are equivalent
to or exceed the specified line requirements. (See Figure 2.)
•
To operate the DGS over longer extra-plant distances, a DGS Signal
Converter and subsets (AT&T 202D or equivalent) must be added between
the DGS Line Concentrator and the receiving buffers. The DGS Buffer
must also be replaced by a pair of Asynchronous Data Set (ADS) Buffers.
This arrangement permits long distance operation of DGS between any
desired points. (See Figure 3.)
•
Although DGS is basically a "one-way" data gathering system, pro-
vision has been made within the Spectra 70 product line to develop inquiry
and remote print back systems which will operate in concert with the
DGS. RCA offers the user flexibility in building his inquiry system by
offering a wide range of remote inquiry! response devices \vhich com-
plement DGS.
As a natural outgro\\,th of RCA's long and unique experience in the
data collection field, DGS has been designed to provide sound and useful
data collection systems. Generally, the DGS offers the user:
systems
modularity and flexibility both in configuration and growth potential,
speed, high reliability, built-in checks to ensure accuracy, ease of use,
and economy.
*
Tape Disc Operating System/Multichannel Communication System.
**
Technical specifications for distance/line requirements will be supplied as an Appendix
to this manual.
2
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