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:
Oct. 30, 1990
Filed:
Sep. 14, 1989
Takeshi Yagi, Otawara, JP;
Toshio Tamura, Otawara, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A subsignal transmitting system had working lines for respectively transmitting multiplexed signals each including a main signal, and had at least one protection line for transmitting one of the multiplexed signals when it is detected that the transmitting conditions of one of the working lines along which the signals are being transmitted are deteriorated. To realize the switching of the subsignal transmitting through the protection line, the system comprises a switching signal transmission line for transmitting, in the direction opposite to the transmission of the multiplexed signals, a switching signal indicating which one of the working lines is too deteriorated for transmission of the corresponding multiplexed signal, a transmitting side subsignal switching unit for outputting one of the input subsignals to one of the working lines respectively and for outputting, in response to the switching signal, one of the input subsignals to the protection line; and a receiving side subsignal switching unit, operatively connected to the subsignal output terminals, for outputting the subsignal through the protection line to, in response to the switching signal, the corresponding one of the subsignal output terminals, the remaining subsignals through the working lines being output to the remaining output terminals, respectively.