Three stage non-blocking switching array

Details Three stage non-blocking switching array Three stage non-blocking switching array

1989-01-27

1991-01-08

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

340826, 379220, 379271, H04Q 100, H04B 338

Patent

active

049839616

ABSTRACT:
A three-stage non-blocking switching array having twice the number of inputs and outputs for its sub-arrays of its input and output stages as the number of lines to be switched, and having one more sub-array in its intermediate stage than the minumum required to form a non-blocking switching array. The additional or redundant inputs and outputs are connected with the non-redundant inputs and outputs such that the redundant inputs are each individually connected with a non-redundant input of a respective other sub-array of the same respective stage. This construction maintains the non-blocking characteristic of the switching array even if one of the sub-arrays fails since, in such use, redundant substitute paths are available.

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Charles Clos, "A Study of Non-Blocking Switching Networks", Bell System Technical Journal, vol. XXXII, 1953, pp. 406-425.

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