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.
Patent No.:
Date of Patent:
Dec. 20, 1994
Filed:
Oct. 27, 1993
Applicant:
Inventors:
Sumie Morita, Yokohama, JP;
Takashi Hatano, Kawasaki, JP;
Ryouzi Takano, Yokohama, JP;
Hisashi Koga, Yokohama, JP;
Tsutomu Shiomitsu, Yokohama, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04J / ; H04J / ;
U.S. Cl.
CPC ...
370 79 ; 370 941 ; 3701101 ;
Abstract
A maintenance link is established according to a LAPD between first and second terminal units on a path through which subscribers' packet information is transmitted. In the first and second terminal units, first and second communication state control units are provided for controlling the consistency of the communication state between the two terminal units by sending/receiving communication state control information using the maintenance link.