Exchange having function for detecting fault in internal unit

Details Exchange having function for detecting fault in internal unit Exchange having function for detecting fault in internal unit

1998-03-16

2000-10-31

Ton, Dang

Multiplex communications

Diagnostic testing

Fault detection

370229, H04J 116

Patent

active

061413267

ABSTRACT:
An exchange has units traversed by cells, such as a line interface unit, a cell multiplexer/demultiplexer unit and a cell switch unit, as well as a processor. Each cell traversing unit detects and counts passing cell and cell error on a per-connection basis, adds the counts, along with unit identification data, onto an intra-office cell and then transmits the cell. One of the cell traversing units serving as an end unit accumulates, for each cell traversing unit and on a per-connection basis, the passing cell counts and the error cell counts sent from the other cell traversing units. The processor detects a fault in a cell traversing unit upon acquiring the passing cell count and cell error count, on a per-connection basis, of each cell traversing unit, the passing cell count and cell error count having been accumulated in the cell traversing unit serving as the end unit.

REFERENCES:
patent: 5949753 (1999-09-01), Alexandes
patent: 5991312 (1999-11-01), Koenig et al.

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