Line concentration system

Multiplex communications – Wide area network – Packet switching

Patent

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Details

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.

REFERENCES:
patent: 3303475 (1963-11-01), Hellerman et al.
patent: 4385379 (1983-05-01), Kelly et al.
patent: 4512014 (1985-04-01), Binz et al.
patent: 4656625 (1987-04-01), Nojiri et al.
patent: 4698801 (1987-10-01), Hatano et al.
patent: 4805165 (1989-02-01), Kawamura et al.

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