JPS5696554A - Self diagnosis system for line interface - Google Patents

Self diagnosis system for line interface

Info

Publication number
JPS5696554A
JPS5696554A JP17172379A JP17172379A JPS5696554A JP S5696554 A JPS5696554 A JP S5696554A JP 17172379 A JP17172379 A JP 17172379A JP 17172379 A JP17172379 A JP 17172379A JP S5696554 A JPS5696554 A JP S5696554A
Authority
JP
Japan
Prior art keywords
information path
receiver
receivers
driver
drivers
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.)
Granted
Application number
JP17172379A
Other languages
Japanese (ja)
Other versions
JPS5810896B2 (en
Inventor
Akihiko Iura
Koji Hattori
Yoshihiro Kondo
Kimio Seki
Kanji Ito
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
NTT Inc
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
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, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP54171723A priority Critical patent/JPS5810896B2/en
Publication of JPS5696554A publication Critical patent/JPS5696554A/en
Publication of JPS5810896B2 publication Critical patent/JPS5810896B2/en
Expired 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
    • H04L1/24—Testing correct operation
    • H04L1/242—Testing correct operation by comparing a transmitted test signal with a locally generated replica
    • H04L1/243—Testing correct operation by comparing a transmitted test signal with a locally generated replica at the transmitter, using a loop-back

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

PURPOSE:To obtain accurate diagnosis result without giving adverse effect on other channels, by providing a loop check set for the self-diagnosis of devices including drivers and receivers. CONSTITUTION:To the pre- and post-device, information path I having receivers 7, 10 and drivers 8, 9 in the information path respectively, loop check set II connected to the input terminal of the receivers 7, 10 for the output terminal of the drivers 8, 9 of each information path, and means RA1-RA4 switching the receiver and driver of each information path, are provided. Further, a given pattern data is fed to each driver and receiver at open state by means of open means, and the diagnosis of each driver and receiver is made with the receiver output of the information path switched.
JP54171723A 1979-12-29 1979-12-29 Line interface self-diagnosis circuit method Expired JPS5810896B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54171723A JPS5810896B2 (en) 1979-12-29 1979-12-29 Line interface self-diagnosis circuit method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54171723A JPS5810896B2 (en) 1979-12-29 1979-12-29 Line interface self-diagnosis circuit method

Publications (2)

Publication Number Publication Date
JPS5696554A true JPS5696554A (en) 1981-08-04
JPS5810896B2 JPS5810896B2 (en) 1983-02-28

Family

ID=15928467

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54171723A Expired JPS5810896B2 (en) 1979-12-29 1979-12-29 Line interface self-diagnosis circuit method

Country Status (1)

Country Link
JP (1) JPS5810896B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930594A (en) * 1982-08-13 1984-02-18 ヤマハ株式会社 Synchronous operation of electronic musical instrument

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930594A (en) * 1982-08-13 1984-02-18 ヤマハ株式会社 Synchronous operation of electronic musical instrument

Also Published As

Publication number Publication date
JPS5810896B2 (en) 1983-02-28

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