Multiplex communications – Wide area network – Packet switching
Patent
1990-01-26
1991-07-02
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 84, 370112, H04Q 1100
Patent
active
050291602
ABSTRACT:
A line concentration system containing: a plurality of data input/output circuits; a plurality of first-side transmission lines to each of which one of a plurality of data input/output circuits can be connected; a second-side transmission line, and a data input/output timing controller. The second-side transmission line is connected with the above plurality of first-side transmission lines, and is capable of transmitting a predetermined number of channels of data. Each of the above data input/output circuits inputs/outputs data at a controlled timing from/onto the first-side transmission line to which its own data input/output circuits is connected. The data input/output timing controller controls the timings of the above inputs/outputs by the above plurality of data input/output circuits so that data input/output operations in two of the data input/output circuits are not simultaneously carried out. In addition, the line concentration system further contains a connection switching circuits, which is provided for connecting a controlled number of corresponding first-side transmission lines with the second-side transmission line; and the controlled number can be selected among a plurality of predetermined numbers.
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Fujitsu Limited
Hsu Alpus H.
Olms Douglas W.
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