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:
Aug. 19, 1986
Filed:
Nov. 15, 1984
Applicant:
Inventor:
Susumu Sasaki, Fujisawa, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
375-3 ; 370 75 ; 1791 / ;
Abstract
A radio relay system for a fully-digitalized transmission network is disclosed. In the system, a received auxiliary signal can be by-passed from receiver to transmitter via a switching circuit provided in the auxiliary unit when an additional auxiliary signal is not input to the equipment. When a local auxiliary signal, for example, order wire signal from telephone equipment, is input, the switching circuit operatively disconnects the switching circuit and switches to supply the additional auxiliary signal to the transmitter. The auxiliary unit is thus by-passed upon the occurrence of a failure of the built-in circuit or power supply of the auxiliary unit.