JPS55161449A - Fault monitor system - Google Patents

Fault monitor system

Info

Publication number
JPS55161449A
JPS55161449A JP6839279A JP6839279A JPS55161449A JP S55161449 A JPS55161449 A JP S55161449A JP 6839279 A JP6839279 A JP 6839279A JP 6839279 A JP6839279 A JP 6839279A JP S55161449 A JPS55161449 A JP S55161449A
Authority
JP
Japan
Prior art keywords
transmission line
monitor
auxiliary
current
control part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6839279A
Other languages
Japanese (ja)
Inventor
Osamu Takahashi
Tadashi Akiba
Hisashi Morikawa
Koji Iijima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6839279A priority Critical patent/JPS55161449A/en
Publication of JPS55161449A publication Critical patent/JPS55161449A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To improve reliability of an auxiliary transmission line, by transmitting a monitor signal to not only the current transmission line but also the auxiliary transmission line to monitor always faults. CONSTITUTION:Synchronizing parts 3 and 4 extract the synchronizing signal from the frame signal for monitor included in signals of current input transmission line 11 and auxiliary input transmission line 13 and apply it to control part 6. Control part 6 controls switching part 5 by this syncronizing signal so that frame signals for monitor of the current transmission line and the auxiliary transmission line can be input to control part 6 correctly. The current transmission line and the auxiliary transmission line are constituted in a loop, and frame signals for monitor transmitted from current output transmission line 12 and auxiliary output transmission line 14 of monitor station 10 respectively circulate once through transmission lines and come to transmission lines 11 and 13 respectively. Consequently, when a fault occurs in any of both transmission lines, control part 6 performs processings such as alarm immediately.
JP6839279A 1979-05-31 1979-05-31 Fault monitor system Pending JPS55161449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6839279A JPS55161449A (en) 1979-05-31 1979-05-31 Fault monitor system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6839279A JPS55161449A (en) 1979-05-31 1979-05-31 Fault monitor system

Publications (1)

Publication Number Publication Date
JPS55161449A true JPS55161449A (en) 1980-12-16

Family

ID=13372384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6839279A Pending JPS55161449A (en) 1979-05-31 1979-05-31 Fault monitor system

Country Status (1)

Country Link
JP (1) JPS55161449A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57207454A (en) * 1981-06-16 1982-12-20 Meidensha Electric Mfg Co Ltd Loop system data highway system
JPS58170249A (en) * 1982-03-31 1983-10-06 Yokogawa Hokushin Electric Corp Redundant loop type data communication system
JPS58204659A (en) * 1982-05-03 1983-11-29 ゼネラル・シグナル・コ−ポレ−シヨン Optical fiber data highway
JPS58204658A (en) * 1982-05-03 1983-11-29 ゼネラル・シグナル・コ−ポレ−シヨン Optical electric mixture data highway
JPS60109946A (en) * 1983-11-18 1985-06-15 Japanese National Railways<Jnr> Fault detector at multiplex system stand-by side
JPS61116450A (en) * 1984-11-10 1986-06-03 Agency Of Ind Science & Technol Optical data way transmitter
JPS61126839A (en) * 1984-11-24 1986-06-14 Fujitsu Ltd Fault retrieval system
JPS6258746A (en) * 1985-09-06 1987-03-14 Nippon Telegr & Teleph Corp <Ntt> Circuit backup system
US5327275A (en) * 1990-10-30 1994-07-05 Fujitsu Limited Switching system of optical transmission lines for protecting from trouble

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5240288A (en) * 1975-09-27 1977-03-29 Fujitsu Ltd Data highway device
JPS5279605A (en) * 1975-12-25 1977-07-04 Fujitsu Ltd Circular communication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5240288A (en) * 1975-09-27 1977-03-29 Fujitsu Ltd Data highway device
JPS5279605A (en) * 1975-12-25 1977-07-04 Fujitsu Ltd Circular communication system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57207454A (en) * 1981-06-16 1982-12-20 Meidensha Electric Mfg Co Ltd Loop system data highway system
JPS58170249A (en) * 1982-03-31 1983-10-06 Yokogawa Hokushin Electric Corp Redundant loop type data communication system
JPS58204659A (en) * 1982-05-03 1983-11-29 ゼネラル・シグナル・コ−ポレ−シヨン Optical fiber data highway
JPS58204658A (en) * 1982-05-03 1983-11-29 ゼネラル・シグナル・コ−ポレ−シヨン Optical electric mixture data highway
JPS60109946A (en) * 1983-11-18 1985-06-15 Japanese National Railways<Jnr> Fault detector at multiplex system stand-by side
JPH0451104B2 (en) * 1983-11-18 1992-08-18 Tetsudo Sogo Gijutsu Kenkyusho
JPS61116450A (en) * 1984-11-10 1986-06-03 Agency Of Ind Science & Technol Optical data way transmitter
JPS61126839A (en) * 1984-11-24 1986-06-14 Fujitsu Ltd Fault retrieval system
JPS6258746A (en) * 1985-09-06 1987-03-14 Nippon Telegr & Teleph Corp <Ntt> Circuit backup system
US5327275A (en) * 1990-10-30 1994-07-05 Fujitsu Limited Switching system of optical transmission lines for protecting from trouble

Similar Documents

Publication Publication Date Title
JPS55161449A (en) Fault monitor system
JPS57116438A (en) Radio communication system
JPS5685112A (en) Check system for electric circuit of car
JPS5447415A (en) Sequelch remote control system for radio relay equipment
JPS6461140A (en) Data transmission equipment
JPS56100543A (en) Failure returning method of loop transmission line
JPS53124005A (en) Monitor system for subscriber line
JPS57101450A (en) Loop transmission system
JPS56120233A (en) Station device for optical data
JPS5365007A (en) Transmission system for intermittent signal
JPS5628532A (en) Transmission unit
JPS543401A (en) State monitor system for mobile station
JPS52146104A (en) Line monitoring system
JPS57138240A (en) Hairpin network
JPS5271908A (en) Abnormal supervising system of signal transmission system
JPS5423438A (en) Terminal connection system
JPS5550757A (en) Signal change-over control device
JPS56154849A (en) Circuit monitoring system of communication controller
JPS57160236A (en) Multiple transmission system for vehicle
JPS52122028A (en) Program switching control system for broadcasting satellite
JPS5490904A (en) Multiple signal transmission system for communication path
JPS553257A (en) Facsimile transmission control system
JPS56156088A (en) Monitor control system
JPS5491126A (en) Two-way itv system
JPS6315809B2 (en)