IN-EQUIPMENT PATH MONITOR SYSTEM

Japanese Patent JP3506479

B2

PURPOSE: To monitor all paths by allowing a cell detection section to generate comparison OAM cell data of an input port number whose reception is estimated corresponding to update of an output port number and comparing the data with cell data received from an object to be tested.
CONSTITUTION: An object to be tested 11 having optional input output ports whose input port number is N and whose output port number is M by receiving allowing N-sets of independent cell detection sections 131-13N to receive OAM cells sent from M-sets of independent cell generating sections 121-12M. Each of the cell generating sections 121-12M and each of the cell detection sections 131-13N are provided respectively with a pattern generator and the cell generating sections insert an OAM cell of a prescribed pattern for a prescribed test period to a cell. The cell detection sections check whether or not the OAM cell of a prescribed pattern is reached for a prescribed test period. No cell abort due to congestion takes place even when the OAM cell is simultaneously inserted at an insertion point by scheduling the insertion so that output paths are not overlapped to each cell generating section.

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Tetsuya Kiyonaga
Toshiyuki Sudo
Jinichi Yoshizawa
Hiromi Ueda
Kenji Akutsu
Ryuichi Ikematsu
Takanori Kurano

JP6210494A

March 15, 2004

March 07, 1994

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富士通株式会社
日本電信電話株式会社
日本電気株式会社

H04Q3/00; H04L12/26; H04L12/28; H04L12/70; (IPC1-7): H04L12/56

Yoshiyuki Osuge (1 outside)

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