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:
Nov. 11, 2003

Filed:

Aug. 11, 1999
Applicant:
Inventor:

Youzou Iketani, Kawasaki, JP;

Assignee:

Fujitsu Limited, Kawasaki, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 7/00 ; H04J 3/06 ;
U.S. Cl.
CPC ...
H04L 7/00 ; H04J 3/06 ;
Abstract

An interface apparatus has a transmitting section in which first transmission-timing information generating means generates transmission timing information X , which constitutes timing information of a sending user clock C , using a network clock CN and the sending user clock C , second transmission-timing information generating means generates test transmission timing information X ′ having any value, a selector selects the transmission timing information X , which is output by the first transmission-timing information generating means, during ordinary communication, and selects the test transmission timing information X ′ during a test, and cell assembling means assembles sending user data D and the transmission timing information X or X ′ selected by the selector into a fixed-length cell and sends the cell to an opposite interface apparatus.


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