JPS5631258A - Line test system - Google Patents

Line test system

Info

Publication number
JPS5631258A
JPS5631258A JP10727479A JP10727479A JPS5631258A JP S5631258 A JPS5631258 A JP S5631258A JP 10727479 A JP10727479 A JP 10727479A JP 10727479 A JP10727479 A JP 10727479A JP S5631258 A JPS5631258 A JP S5631258A
Authority
JP
Japan
Prior art keywords
line
wire
trouble
circuits
circuit
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
JP10727479A
Other languages
Japanese (ja)
Inventor
Kozo Kamata
Hirotoshi Shirasu
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 JP10727479A priority Critical patent/JPS5631258A/en
Publication of JPS5631258A publication Critical patent/JPS5631258A/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)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To extend the range of line test, by separating and detecting currents of two-wire lines in the two-wire line storing circuit using the hybrid coil with Hall element. CONSTITUTION:The core of the hybrid coil constituting a two-wire.four-wire converting circuit is divided into two and is constituted as two independent transformers 10A and 10B. Hall element circuits 12A and 12B and amplifying circuits 13A and 13B are connected to respective cores. Consequently, currents of the A line and the B line of subscriber's line 2 can be separated and detected by circuits 12A, 12B, 13A and 13B. As a result, wide-range measurement for the ground-fault trouble, the short-circuit trouble, the induction trouble, and so on is possible.
JP10727479A 1979-08-24 1979-08-24 Line test system Pending JPS5631258A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10727479A JPS5631258A (en) 1979-08-24 1979-08-24 Line test system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10727479A JPS5631258A (en) 1979-08-24 1979-08-24 Line test system

Publications (1)

Publication Number Publication Date
JPS5631258A true JPS5631258A (en) 1981-03-30

Family

ID=14454902

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10727479A Pending JPS5631258A (en) 1979-08-24 1979-08-24 Line test system

Country Status (1)

Country Link
JP (1) JPS5631258A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01196950A (en) * 1988-02-01 1989-08-08 Nippon Telegr & Teleph Corp <Ntt> Method and equipment for digital subscriber line
JPH02121916U (en) * 1989-03-16 1990-10-04
JPH03176674A (en) * 1989-12-05 1991-07-31 Hiroshi Seki Checker of electric leak
JPH0480024A (en) * 1990-07-23 1992-03-13 Shigehiro Tawada Manufacture of core material of corrugated board

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01196950A (en) * 1988-02-01 1989-08-08 Nippon Telegr & Teleph Corp <Ntt> Method and equipment for digital subscriber line
JPH02121916U (en) * 1989-03-16 1990-10-04
JPH03176674A (en) * 1989-12-05 1991-07-31 Hiroshi Seki Checker of electric leak
JPH0480024A (en) * 1990-07-23 1992-03-13 Shigehiro Tawada Manufacture of core material of corrugated board

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