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:
May. 17, 1994
Filed:
Mar. 31, 1992
Eiji Sugawara, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A line interface circuit on the receiving side detects communication failure in terms of an error rate and informs the supervisory and control unit on the receiving side of the occurrence of the failure. The supervisory and control unit on the receiving side in turn switches the line data communications from the receiving side to the transmitting side to another line unused for data communications to inform the supervisory and control unit on the transmitting side of the occurrence of the failure. The supervisory and control unit on the transmitting side switches the line for data communications from the transmitting side to the receiving side to the other line. The switching circuit on the receiving side comprises buffers each inserted in a line and a buffer connected to the common outputs of the buffers so that the supervisory and control unit on the receiving side automatically receives a transmit signal transmitted over a line switched on the transmitting side.