JPS534412A - Test method for subscribing lines - Google Patents

Test method for subscribing lines

Info

Publication number
JPS534412A
JPS534412A JP7778576A JP7778576A JPS534412A JP S534412 A JPS534412 A JP S534412A JP 7778576 A JP7778576 A JP 7778576A JP 7778576 A JP7778576 A JP 7778576A JP S534412 A JPS534412 A JP S534412A
Authority
JP
Japan
Prior art keywords
lines
subscribing
test method
enable
short
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
JP7778576A
Other languages
Japanese (ja)
Inventor
Kozo Kamata
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 JP7778576A priority Critical patent/JPS534412A/en
Publication of JPS534412A publication Critical patent/JPS534412A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Locating Faults (AREA)

Abstract

PURPOSE:To enable the short and ground faults of the subscribing lines for the detection from the four wires side of the subscribing lines, in the time-sharing local telephone exchangers of four lines type.
JP7778576A 1976-07-02 1976-07-02 Test method for subscribing lines Pending JPS534412A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7778576A JPS534412A (en) 1976-07-02 1976-07-02 Test method for subscribing lines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7778576A JPS534412A (en) 1976-07-02 1976-07-02 Test method for subscribing lines

Publications (1)

Publication Number Publication Date
JPS534412A true JPS534412A (en) 1978-01-17

Family

ID=13643616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7778576A Pending JPS534412A (en) 1976-07-02 1976-07-02 Test method for subscribing lines

Country Status (1)

Country Link
JP (1) JPS534412A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55100773A (en) * 1979-01-26 1980-07-31 Nippon Telegr & Teleph Corp <Ntt> Supervisory unit for occasional break fault of data transmission line
JPS59110022A (en) * 1982-12-14 1984-06-25 Sanyo Electric Co Ltd Magnetic head
JPS60106011A (en) * 1983-11-11 1985-06-11 Sanyo Electric Co Ltd Production of magnetic head
JPS60146908U (en) * 1984-03-12 1985-09-30 三洋電機株式会社 magnetic head

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55100773A (en) * 1979-01-26 1980-07-31 Nippon Telegr & Teleph Corp <Ntt> Supervisory unit for occasional break fault of data transmission line
JPS59110022A (en) * 1982-12-14 1984-06-25 Sanyo Electric Co Ltd Magnetic head
JPS60106011A (en) * 1983-11-11 1985-06-11 Sanyo Electric Co Ltd Production of magnetic head
JPS60146908U (en) * 1984-03-12 1985-09-30 三洋電機株式会社 magnetic head

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