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A DATANET-30 system consists of a variety of equipment, the choice of which depends upon sys-
tem design and requirements. The following illustrations cover some of the combinations possible
with a DA TANET-30 to fill the communication requirements of modern business activities.
TELETYPE MESSAGE SWITCHING SYSTEM
The General Electric DATANET-30 switching center is a fully-automatic system designed to
perform, store and forward message switching. The DATANET-30 switching center can be used
to communicate with any of the following:
1.
Direct-connected communication stations,
2.
Multipoint private line connected stations,
3.
Dial-up stations on public message networks,
4.
Direct input/output with computer systems (core to core),
5.
Indirect input/ output with computer systems (via magnetic tape or a disc storage unit),
6.
Communication with other networks or portions of a network.
Functions
All the functions of transmitting to or rece1vmg messages (data) from a remote terminal, and
handling the messages enroute from origin to destination must be coordinated within the message
switching system.
This coordination is accomplished by providing means for the functions of:
1.
Message Accumulation--Messages are assembled and routed under program control.
2.
Message Distribution--Messages are distributed under program control.
3.
Automatic Multipoint Private Line Control (Party Line)--Polling and selection of stations
on the line is accomplished under program control.
4.
In-Transit Storage--Storage is provided for message queueing.
5.
Journal Storage--Storage is provided for recording message journals.
6.
Intercept Storage--Storage is provided for messages for stations closed due to limited
time of operation, station malfunction, etc.
7.
Message Accounting--Journal storage can be processed during off hours or low activity
periods to provide daily status reports, and data for network study.
8.
Traffic Analysis--The number of messages per line per station per day can be counted.
The reports generated can then by typed out at the supervisory position. Such items as
average message length, number of multiple message broadcasts, and operator errors in
formatting may be included in the reports.
9.
Multiple Message Broadcast--Individual messages can be routed to more than one out-
station as designated by the routing indicators.
10.
Automatic Restart--System is capable of automatically restarting itself in case of
program malfunction.
11.
Supervisory System Monitoring--One Automatic Send-Receive (ASR) and a Receive Only
(RO) Teletype device are used for system monitoring. Headers of misrouted messages
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