The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Apr. 07, 1998

Filed:

Sep. 11, 1996
Applicant:
Inventor:

Haruo Moritomo, Kanagawa, JP;

Assignee:

Fujitsu Limited, Kanagawa, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J / ; H04L / ;
U.S. Cl.
CPC ...
370235 ; 370395 ;
Abstract

If an illegal cell number is detected three times continuously for a monitor section in a connection, then tag information including class information indicating the lowest quality class is added to a cell in the connection. If a normal cell number is detected four times continuously for the monitor section with the quality class of the cell lowered for the connection, then the quality class of the cell in the connection is restored to its original class. If an illegal cell number is detected n times continuously for the monitor section with the quality class of the cell lowered in the connection, then the tag information including valid/invalid information indicating an invalid state is added to the cell in the connection. As a result, the cell is stopped from being transmitted to a cell switch. If a normal cell number is detected m times continuously with the transmission of cells stopped, then the cell is released from the stop to the transmission of cells to the cell switch.


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