JPS5577258A - Abnormality detecting method for data transmission line - Google Patents

Abnormality detecting method for data transmission line

Info

Publication number
JPS5577258A
JPS5577258A JP15010378A JP15010378A JPS5577258A JP S5577258 A JPS5577258 A JP S5577258A JP 15010378 A JP15010378 A JP 15010378A JP 15010378 A JP15010378 A JP 15010378A JP S5577258 A JPS5577258 A JP S5577258A
Authority
JP
Japan
Prior art keywords
transmission line
trouble
lamp
station
output
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
JP15010378A
Other languages
Japanese (ja)
Inventor
Jinichi Sakurai
Masami Tamura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15010378A priority Critical patent/JPS5577258A/en
Publication of JPS5577258A publication Critical patent/JPS5577258A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Dc Digital Transmission (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To make the maintenance and inspection of a system effective by enabling a detection circuit for signal variation to decide upon whether abnormality of a serial transmission line is a trouble in a station or of the transmission line. CONSTITUTION:A station consists of receiver circuit 9 shaping input signals, clock generation part 10 extracting clocks from its output, control part 11 connecting to CPU, and transmitter circuit 12 sending its output signal out, and detection parts 13 and 14 exercise a supervision over variation time of input signals and output signals. If a signal would not vary for longer than a certain time, lamp 15 or 16 is made to come on. Here, when lamp 15 comes on the trouble of the transmission line is considered and when lamp 15 goes off and lamp 16 comes on, a trouble between the both is considered, so that it will be judged whether the trouble is occurring on the transmission line or in the station.
JP15010378A 1978-12-06 1978-12-06 Abnormality detecting method for data transmission line Pending JPS5577258A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15010378A JPS5577258A (en) 1978-12-06 1978-12-06 Abnormality detecting method for data transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15010378A JPS5577258A (en) 1978-12-06 1978-12-06 Abnormality detecting method for data transmission line

Publications (1)

Publication Number Publication Date
JPS5577258A true JPS5577258A (en) 1980-06-10

Family

ID=15489561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15010378A Pending JPS5577258A (en) 1978-12-06 1978-12-06 Abnormality detecting method for data transmission line

Country Status (1)

Country Link
JP (1) JPS5577258A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5870655A (en) * 1981-10-22 1983-04-27 Nippon Denso Co Ltd Multiplex-signal transmitter for car
US4590924A (en) * 1983-09-21 1986-05-27 Olympus Optical Co., Ltd. Endoscope system
JPS63142736A (en) * 1986-12-04 1988-06-15 Nec Corp Line supervisory system
JPS63312743A (en) * 1987-06-16 1988-12-21 Nec Corp Fault detecting mechanism for ring type network

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5162602A (en) * 1974-11-28 1976-05-31 Nippon Shisutemu Kogyo Kk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5162602A (en) * 1974-11-28 1976-05-31 Nippon Shisutemu Kogyo Kk

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5870655A (en) * 1981-10-22 1983-04-27 Nippon Denso Co Ltd Multiplex-signal transmitter for car
US4590924A (en) * 1983-09-21 1986-05-27 Olympus Optical Co., Ltd. Endoscope system
JPS63142736A (en) * 1986-12-04 1988-06-15 Nec Corp Line supervisory system
JPS63312743A (en) * 1987-06-16 1988-12-21 Nec Corp Fault detecting mechanism for ring type network

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