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Functions
As a remote concentrator, the DATANET-30 takes traffic from low volume areas with low speed
terminal devices and depending upon the program, performs the following functions:
1.
Message accumulation and distribution
2.
Code conversion
3.
Speed conversion
4.
Multipri vate line control
5.
Error control
6.
In-transit storage
7.
Unattended operation
Operation
The messages are accumulated from many remote terminals and held in the in-transit storage
until they can be transmitted at higher speed over a trunk line to a DATANET-30 switching center.
When messages are received by a DATANET-30 remote concentrator from another DATANET-30,
speed and code conversion are accomplished and the messages are transmitted out to the lower
speed terminal devices.
Hence, an increase in line utilization is obtained between two DATA-
NET-30 centers and the low speed remote terminals. Traffic can be handled two ways:
The concentrator can act as a store and forward switching center between those remote
terminals connected into the concentrator.
The concentrator can be operating in the capacity of a relay station with the message switching
being done by a DATANET-30 functioning as a switching center. All messages would go one
way to the switching center and then back to the concentrator for transmission to one of the
remote stations.
THE NETWORK
The DATANET-30 can be built up to a network configuration by interconnecting several DATA-
NET-30 switching centers with high speed lines.
Figure 6. Nationwide Network
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