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:
Mar. 04, 1986
Filed:
Nov. 18, 1983
Applicant:
Inventors:
Sachio Miyazaki, Tokyo, JP;
Shinichiro Aoki, Sagamihara, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J / ; H04L / ;
U.S. Cl.
CPC ...
370104 ; 375108 ;
Abstract
A synchronization method and apparatus in redundant time-division-multiple-access communication equipment, wherein the synchronization between an active circuit and a standby circuit is carried out using a frequency divided signal from the active transmission frame timing signal instead of using the transmission frame timing signal. At timings other than the output timing of the frequency divided signal, the standby transmission frame counter runs independently. Thus, failure of the active circuit has less effect on the standby circuit and switching between the active circuit and the standby circuit can be carried out smoothly.