JPS5612136A - Detecting method for fault of balanced cable - Google Patents

Detecting method for fault of balanced cable

Info

Publication number
JPS5612136A
JPS5612136A JP8709779A JP8709779A JPS5612136A JP S5612136 A JPS5612136 A JP S5612136A JP 8709779 A JP8709779 A JP 8709779A JP 8709779 A JP8709779 A JP 8709779A JP S5612136 A JPS5612136 A JP S5612136A
Authority
JP
Japan
Prior art keywords
fault
relay
balanced
balanced cable
cable
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
JP8709779A
Other languages
Japanese (ja)
Inventor
Hiroshi Fujio
Masaharu Shimada
Takeshi Kakino
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP8709779A priority Critical patent/JPS5612136A/en
Publication of JPS5612136A publication Critical patent/JPS5612136A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing

Abstract

PURPOSE:To detect faults of balanced cables automatically by putting a balanced cable on a terminal side into switching operation by applying a DC voltage to a balanced cable on an office side in the opposite direction of communication. CONSTITUTION:To check balanced cables L and L' with regard to a fault, a DC voltage is applied to the balanced cable on office side 2 from electric power source 3 in the opposite direction of a call to excite relay 6 on this side of terminal side 1. As relay 6 operates, contact 7 is opened and relay 6 is not excited any more, closing contact 7. The above-mentioned operation is repeated to send a pulse from terminal side 1 to office side 2, so that the fault can be detected. In the call, relay 6 is not excited by diodes 8 and 8'.
JP8709779A 1979-07-10 1979-07-10 Detecting method for fault of balanced cable Pending JPS5612136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8709779A JPS5612136A (en) 1979-07-10 1979-07-10 Detecting method for fault of balanced cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8709779A JPS5612136A (en) 1979-07-10 1979-07-10 Detecting method for fault of balanced cable

Publications (1)

Publication Number Publication Date
JPS5612136A true JPS5612136A (en) 1981-02-06

Family

ID=13905438

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8709779A Pending JPS5612136A (en) 1979-07-10 1979-07-10 Detecting method for fault of balanced cable

Country Status (1)

Country Link
JP (1) JPS5612136A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS625739A (en) * 1985-07-01 1987-01-12 Nippo Tsushin Kogyo Kk Supervisory equipment for communication line
DE19530445A1 (en) * 1995-08-18 1997-02-20 Mc Micro Compact Car Ag Buckle holder of stiffened belt material for safety belt of motor vehicle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS625739A (en) * 1985-07-01 1987-01-12 Nippo Tsushin Kogyo Kk Supervisory equipment for communication line
JPH044781B2 (en) * 1985-07-01 1992-01-29
DE19530445A1 (en) * 1995-08-18 1997-02-20 Mc Micro Compact Car Ag Buckle holder of stiffened belt material for safety belt of motor vehicle
DE19530445C2 (en) * 1995-08-18 1998-02-26 Mc Micro Compact Car Ag Belt buckle holder made of stiffened webbing for a seat belt in a motor vehicle
US5860706A (en) * 1995-08-18 1999-01-19 Micro Compact Car Aktiengesellschaft Buckle holder made of a reinforced belt strap for a seat belt in a motor vehicle

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