EP0359261A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Subsignal transmitting system
Assignee: Fujitsu Ltd
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Filing: 1989-09-14
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Granted: —
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Expires: 2009-09-14
Abstract
Abstract Disclosed is a subsignal transmitting system having working lines (A,B) for respectively transmitting multiplexed signals each including a main signal and having at least one protection line (C) for transmitting one of the multiplexed signals when it is detected that the transmitting conditions of one of the working lines (A,B) along which the signals are being transmitted are deteriorated. To realize the switching of the subsignal transmitting through the protection line (C), the system comprises a switching signal transmission line (D) for transmitting in the direction opposite to the transmission of the multiplexed signals, a switching signal indicating which one of the working lines (A,B) is deteriorated for transmission of the corresponding multiplexed signal, a transmitting side subsignal switching unit (6,9) for outputting one of the input subsignals to one of the working lines (A,B) respectively and for outputting, in response to the switching signal, one of the input subsignals to the protection line (C); and a receiving side subsignal switching unit (13,14), operatively connected to the subsignal output terminals (OS1,OS2) for outputting the subsignal through the protection line (C) to, in response to the switching signal, the corresponding one of the subsignal output terminals (OS1,OS2), the remaining subsignals through the working lines (A,B) being output to the remaining output terminals, respectively.
Inventors
- 👤 Takeshi Yagi
- 👤 Toshio Tamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:32
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/22
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
251 words
A subsignal transmitting system having a plurality of working lines (A,B) for respectively transmitting multiplexed signals each including a main signal (a,b), and having at least one protection line (C) for transmitting one of said multiplexed signals when when it is detected that the transmitting condition of one of said working lines along which said signals is being transmitted are deteriorated; wherein each of said multiplexed signals includes a subsignal (c,d) multiplexed with said main signal; said subsignal transmitting system comprising: a plurality of subsignal input terminals (IS1,IS2) for respectively receiving input subsignals; a plurality of subsignal output terminals (OS1,OS2) for respectively outputting subsignals transmitted through said working lines or said protection line; a switching signal transmission line (D-D) for transmitting, in the direction opposite to the transmission of said multiplexed signals, a switching signal indicating which one of said working lines is deteriorated for transmission of the corresponding multiplexed signal; transmitting side subsignal switching means (6, 9), operatively connected to said subsignal input terminals, for outputting one of said said input subsignals to one of said working lines respectively and for outputting, in response to said switching signal, one of said input subsignals to said protection line; and receiving side subsignal switching means (13, 14), operatively connected to said subsignal output terminals, for outputting said subsignal through said protection line to, in response to said switching signal, the corresponding one of said subsignal output terminals, the remaining subsignals through said working lines being output to the remaining output terminals, respectively.
Claim 2
Dependent Claim
251 words
A subsignal transmitting system having a plurality of working lines (A,B) for respectively transmitting multiplexed signals each including a main signal (a,b), and having at least one protection line (C) for transmitting one of said multiplexed signals when when it is detected that the transmitting condition of one of said working lines along which said signals is being transmitted are deteriorated; wherein each of said multiplexed signals includes a subsignal (c,d) multiplexed with said main signal; said subsignal transmitting system comprising: a plurality of subsignal input terminals (IS1,IS2) for respectively receiving input subsignals; a plurality of subsignal output terminals (OS1,OS2) for respectively outputting subsignals transmitted through said working lines or said protection line; a switching signal transmission line (D-D) for transmitting, in the direction opposite to the transmission of said multiplexed signals, a switching signal indicating which one of said working lines is deteriorated for transmission of the corresponding multiplexed signal; transmitting side subsignal switching means (6, 9), operatively connected to said subsignal input terminals, for outputting one of said said input subsignals to one of said working lines respectively and for outputting, in response to said switching signal, one of said input subsignals to said protection line; and receiving side subsignal switching means (13, 14), operatively connected to said subsignal output terminals, for outputting said subsignal through said protection line to, in response to said switching signal, the corresponding one of said subsignal output terminals, the remaining subsignals through said working lines being output to the remaining output terminals, respectively.
Claim 3
Dependent Claim
45 words
A subsignal transmitting system as claimed in claim 1, wherein said switching signal transmission line is an opposite direction protection line for transmitting an opposite-direction multiplexed signal including an opposite-direction main signal and an opposite-direction subsignal, said switching signal being included in said opposite-direction subsignal.
Claim 4
Dependent Claim
34 words
A subsignal transmitting system as claimed in claim 1, wherein said subsignals include switching signals each indicating whether the corresponding one of said working lines is deteriorated for transmission of the corresponding multiplexed signal.
Claim 5
Dependent Claim
16 words
A subsignal transmitting system as claimed in claim 3, wherein said subsignals further include orderwire signals.
Claim 6
Dependent Claim
17 words
A subsignal transmitting system as claimed in claim 3, wherein said subsignals further include way side signals.
Claim 7
Dependent Claim
159 words
A subsignal transmitting system as claimed in claim 1, further comprising: transmitting side main signal switching means (211) having a plurality of main signal input terminals (IM1,IM2) and a plurality of output terminals operatively connected to the input sides of said plurality of working lines and said protection line, for connecting said main signal input terminals to the input sides of said working lines respectively and for selectively connecting, in response to said switching signal, the corresponding one of said main signals to the input side of said protection line; and receiving side main signal switching means (212) having a plurality of main signal output terminals (OM1,OM2), for connecting, in response to said switching signal, the output sides of said working lines except for the deteriorated working line to the corresponding main signal output terminals and for selectively connecting, in response to said switching signal, the output side of said protection line to the corresponding main signal output terminal.
Claim 8
Dependent Claim
109 words
A subsignal transmitting system as claimed in claim 6, further comprising: transmitting terminal equipment means (1), operatively connected to said transmitting side switching means, for inserting said input subsignals into said main signals to form and transmit said multiplexed signals; receiving terminal equipment means (3), operatively connected to said receiving side switching means, for dropping said subsignals from said multiplexed signals to output said output main signals and said output subsignals; and at least one intermediate repeater means, operatively connected between said transmitting terminal equipment means and said receiving terminal equipment means, for dropping necessary subsignals from said multiplexed signals and for inserting necessary subsignals into said multiplexed signals.
Claim 9
Dependent Claim
83 words
A subsignal transmitting system as claimed in claim 7, wherein said transmitting side subsignal switching means (6, 9) comprises: switching signal detecting means (6), operatively connected to said switching signal transmission line (D-D), for detecting said switching signal; and first subsignal selecting means (9), operatively connected to said switching signal detecting means (6) and to said subsignal input terminals, for selecting, in response to said detected switching signal, a subsignal corresponding to the deteriorated working line to be inserted into said protection line.
Claim 10
Dependent Claim
79 words
A subsignal transmitting system as claimed in claim 8, wherein said receiving side subsignal switching means (13,14) comprises: a plurality of subsignal selecting means (13,14), provided to respectively correspond to said plurality of working lines and operatively connected to said plurality of working lines, to said protection line and to said output subsignal terminals, for selecting, in response to said switching signal from said receiving side swithcing means, the subsignals from said working lines or from said protection line.
Claim 11
Dependent Claim
129 words
A subsignal transmitting system as claimed in claim 9, further comprising: intermediate switching signal detecting means (7), operatively connected to said switching signal transmission line (D-D), for detecting said switching signal; a plurality of dropping subsignal selecting means (10,11), provided to respectively correspond to said plurality of working lines and connected to said intermediate switching signal detecting means, for selectively dropping, in response to said switching signal from said intermediate switching signal detecting means, subsignals from said working lines or from said protection line; and inserting subsignal selecting means (12), operatively connected to said intermediate switching signal detecting means and to said protection line, for selectively inserting, in response to said switching signal from said intermediate switching signal detecting means, one of said input subsignals into said protection line.
Claim 12
Dependent Claim
84 words
A subsignal transmitting system as claimed in claim 10, wherein said transmitting terminal equipment means (1) comprises, corresponding to each of said working lines, a data service channel unit (16,17) for multiplexing the corresponding input main signal with the corresponding input subsignal to form a multiplexed signal, and a transmitter (28,29) for transmitting said multiplexed signal to the corresponding working line, and comprises, corresponding to said protection line, a data surface channel unit (15) for multiplexing the selected main signal with the selected subsignal.
Claim 13
Dependent Claim
84 words
A subsignal transmitting system as claimed in claim 10, wherein said intermediate repeater means comprises, corresponding to each of said working lines and said protection line, a reciver for receiving the multiplexed signal from the corresponding transmitter, a data service channel unit for dropping the subsignal from the multiplexed signal output from said receiver and for inserting an input subsignal into the corresponding working line, and a transmitter for transmitting the multiplexed signal from the data service channel unit to the corresponding working line.
Claim 14
Dependent Claim
61 words
A subsignal transmitting system as claimed in claim 10, wherein said receiving terminal equipment means comprises, corresponding to each of said working lines and said protection line, a receiver for receiving the multiplexed signal from the corresponding transmitter in said intermediate repeater means, and a data service channel unit for dropping the subsignal from the multiplexed signal output from said receiver.
References Cited (Backward Citations)
No citation records indexed.
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